/* ═══════════════════════════════════════════════════════════════
   Design System — Mrunal Shende Academic Portfolio
   Dark red-black · Sidebar nav · wodniack-inspired
   ═══════════════════════════════════════════════════════════════ */

:root {
    /* ── Dark Theme (default) — deep red-black ── */
    --bg:            #140000;
    --bg-alt:        #1a0404;
    --bg-card:       #220808;
    --bg-card-hover: #2c0e0e;
    --text:          #ede8e0;
    --text-secondary:#9a9088;
    --text-muted:    #5a5250;
    --accent:        #5eaaa2;
    --accent-soft:   #7cc4bc;
    --accent-bg:     rgba(94, 170, 162, 0.10);
    --accent-border: rgba(94, 170, 162, 0.30);
    --border:        rgba(237, 232, 224, 0.07);
    --border-hover:  rgba(237, 232, 224, 0.14);
    --binary-color:  rgba(94, 170, 162, 0.35);
    --binary-lit:    rgba(124, 196, 188, 0.85);
    --binary-bg:     #0e0000;
    --stripe-color:  rgba(94, 170, 162, 0.18);

    /* ── Typography ── */
    --font-heading: 'Source Serif 4', 'Georgia', serif;
    --font-body:    'Inter', -apple-system, 'Segoe UI', sans-serif;
    --font-mono:    'JetBrains Mono', 'Fira Code', monospace;

    /* ── Layout ── */
    --sidebar-width: 220px;
    --max-width:     68rem;
    --nav-height:    3.75rem; /* mobile only */

    /* ── Spacing ── */
    --space-xs:  0.25rem;
    --space-sm:  0.5rem;
    --space-md:  1rem;
    --space-lg:  1.5rem;
    --space-xl:  2.5rem;
    --space-2xl: 4rem;
    --space-3xl: 6rem;

    /* ── Transitions ── */
    --ease:     cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --duration: 0.3s;
}

/* ── Light Mode — Warm Paper + Deep Indigo ── */
[data-theme="light"] {
    --bg:            #fefdf8;
    --bg-alt:        #f0ecfa;
    --bg-card:       #ffffff;
    --bg-card-hover: #f3eeff;
    --text:          #140d2e;
    --text-secondary:#3b2e6b;
    --text-muted:    #6b5fa0;
    --accent:        #4f35e0;
    --accent-soft:   #7a67e8;
    --accent-bg:     rgba(79, 53, 224, 0.07);
    --accent-border: rgba(79, 53, 224, 0.24);
    --border:        rgba(20, 13, 46, 0.09);
    --border-hover:  rgba(20, 13, 46, 0.18);
    --binary-color:  rgba(79, 53, 224, 0.20);
    --binary-lit:    rgba(79, 53, 224, 0.65);
    --binary-bg:     #e6e0f8;
    --stripe-color:  rgba(79, 53, 224, 0.09);
}


/* ═══════════════════════════════════════════
   Reset & Base
   ═══════════════════════════════════════════ */

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html {
    scroll-behavior: smooth;
    scroll-padding-top: 2rem;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.7;
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background 0.35s var(--ease), color 0.35s var(--ease);
}

::selection { background: var(--accent); color: #fff; }
img  { max-width: 100%; display: block; }
ul   { list-style: none; }

a {
    color: var(--accent);
    text-decoration: none;
    transition: color var(--duration) var(--ease);
}
a:hover { color: var(--accent-soft); }


/* ═══════════════════════════════════════════
   Layout — Sidebar + Main
   ═══════════════════════════════════════════ */

.main-content {
    margin-left: var(--sidebar-width);
    min-height: 100vh;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-xl);
}


/* ═══════════════════════════════════════════
   Sidebar Navigation
   ═══════════════════════════════════════════ */

.sidebar {
    position: fixed;
    top: 0; left: 0; bottom: 0;
    width: var(--sidebar-width);
    background: var(--bg);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    padding: 2rem 1.5rem;
    z-index: 100;
    overflow-y: auto;
    transition: background 0.35s var(--ease);
}

/* Scrollbar in sidebar */
.sidebar::-webkit-scrollbar { width: 3px; }
.sidebar::-webkit-scrollbar-track { background: transparent; }
.sidebar::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

/* Logo */
.sb-logo {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.02em;
    margin-bottom: 1.5rem;
    flex-shrink: 0;
}
.sb-logo:hover { color: var(--text); }
.sb-dot { color: var(--accent); }

/* Console */
.sb-console {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    color: var(--accent);
    letter-spacing: 0.1em;
    border: 1px solid var(--accent-border);
    background: var(--accent-bg);
    padding: 4px 10px;
    border-radius: 4px;
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 1px;
    flex-shrink: 0;
}

.console-cursor {
    animation: blink 1s step-end infinite;
    color: var(--accent-soft);
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50%       { opacity: 0; }
}

/* Nav links */
.sb-links {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    flex: 1;
}

.sb-link {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-muted);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    padding: 0.5rem 0.6rem;
    border-radius: 5px;
    position: relative;
    transition: all var(--duration) var(--ease);
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.sb-link::before {
    content: '';
    width: 4px; height: 4px;
    border-radius: 50%;
    background: var(--accent);
    flex-shrink: 0;
    opacity: 0;
    transform: scale(0);
    transition: all var(--duration) var(--ease);
}

.sb-link:hover,
.sb-link.active {
    color: var(--text);
    background: var(--accent-bg);
}

.sb-link.active::before,
.sb-link:hover::before {
    opacity: 1;
    transform: scale(1);
}

.sb-link.active { color: var(--accent-soft); }

/* Sidebar bottom */
.sb-bottom {
    flex-shrink: 0;
    margin-top: 2rem;
}

.sb-status {
    margin-bottom: 1rem;
    border-top: 1px solid var(--border);
    padding-top: 1rem;
}

.sb-status span {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.62rem;
    color: var(--text-muted);
    letter-spacing: 0.04em;
    line-height: 1.8;
}

.sb-status span:last-child { color: var(--accent); }

.sb-actions {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    flex-wrap: wrap;
}

.sb-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px; height: 32px;
    border-radius: 6px;
    border: 1px solid var(--border);
    color: var(--text-muted);
    background: transparent;
    cursor: pointer;
    transition: all var(--duration) var(--ease);
    font-family: var(--font-body);
}
.sb-icon svg { width: 14px; height: 14px; }
.sb-icon:hover {
    border-color: var(--accent-border);
    color: var(--accent);
    background: var(--accent-bg);
}

/* Show/hide sun/moon */
.theme-icon-sun  { display: none; }
.theme-icon-moon { display: block; }
[data-theme="light"] .theme-icon-sun  { display: block; }
[data-theme="light"] .theme-icon-moon { display: none; }

/* Mobile hamburger (hidden on desktop) */
.sb-hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}
.sb-hamburger span {
    display: block;
    width: 22px; height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: transform var(--duration) var(--ease),
                opacity  var(--duration) var(--ease);
}

/* Hamburger → ✕ when menu is open */
.sb-hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.sb-hamburger.active span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.sb-hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }


/* ═══════════════════════════════════════════
   Hero
   ═══════════════════════════════════════════ */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-binary {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    opacity: 0.4;
}

.hero-binary .bin-row {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    color: var(--binary-color);
    letter-spacing: 0.18em;
    white-space: nowrap;
    line-height: 1.6;
    padding: 0 1rem;
    mask-image: linear-gradient(to top, rgba(0,0,0,0.6) 0%, transparent 80%);
    -webkit-mask-image: linear-gradient(to top, rgba(0,0,0,0.6) 0%, transparent 80%);
}

.hero-content {
    position: relative;
    z-index: 2;
    width: 100%;
    padding: var(--space-xl) 0;
}

/* ── 2-column hero grid ── */
.hero-inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    min-height: calc(100vh - 4rem);
    padding: var(--space-2xl) 0;
}
.hero-left {
    display: flex;
    flex-direction: column;
}

/* Status pill */
.hero-status {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--accent-soft);
    border: 1px solid var(--accent-border);
    background: var(--accent-bg);
    padding: 5px 14px 5px 10px;
    border-radius: 20px;
    align-self: flex-start;
    letter-spacing: 0.04em;
    margin-bottom: var(--space-xl);
    opacity: 0;
    animation: fadeInUp 0.5s var(--ease) 0.1s forwards;
}
.hero-status-dot {
    width: 7px; height: 7px;
    border-radius: 50%;
    background: var(--accent);
    flex-shrink: 0;
    animation: statusPulse 2s ease-in-out infinite;
}
@keyframes statusPulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(94,170,162,0.6); }
    50%       { box-shadow: 0 0 0 6px rgba(94,170,162,0); }
}

.hero-name {
    font-family: var(--font-heading);
    font-size: clamp(3.2rem, 6vw, 6.5rem);
    font-weight: 700;
    line-height: 0.9;
    letter-spacing: -0.03em;
    color: var(--text);
    margin-bottom: var(--space-lg);
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.7s var(--ease) 0.2s forwards;
}
.hero-word { display: block; }

/* Role tags */
.hero-role {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-bottom: var(--space-lg);
    opacity: 0;
    animation: fadeInUp 0.6s var(--ease) 0.35s forwards;
}
.hero-role-tag {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--text-secondary);
    letter-spacing: 0.04em;
}
.hero-role-sep { color: var(--accent); font-size: 1rem; line-height: 1; }

.hero-intro {
    font-size: 0.98rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
    opacity: 0;
    transform: translateY(16px);
    animation: fadeInUp 0.7s var(--ease) 0.45s forwards;
}

/* KPI bar */
.hero-kpis {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    padding: var(--space-md) var(--space-xl);
    border: 1px solid var(--border);
    border-radius: 10px;
    background: rgba(94,170,162,0.04);
    align-self: flex-start;
    margin-bottom: var(--space-xl);
    opacity: 0;
    animation: fadeInUp 0.6s var(--ease) 0.58s forwards;
}
.hero-kpi {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    min-width: 2.8rem;
}
.hero-kpi-val {
    font-family: var(--font-mono);
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--accent);
    line-height: 1;
    letter-spacing: -0.02em;
}
.hero-kpi-lbl {
    font-family: var(--font-mono);
    font-size: 0.59rem;
    color: var(--text-muted);
    letter-spacing: 0.07em;
    text-transform: uppercase;
}
.hero-kpi-rule {
    width: 1px;
    height: 2.2rem;
    background: var(--border-hover);
    flex-shrink: 0;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    opacity: 0;
    transform: translateY(16px);
    animation: fadeInUp 0.7s var(--ease) 0.68s forwards;
}

/* Right column */
.hero-right {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    animation: fadeIn 1s var(--ease) 0.7s forwards;
}
.hero-right::before {
    content: '';
    position: absolute;
    inset: -15%;
    background: radial-gradient(ellipse 60% 60% at 50% 52%, rgba(94,170,162,0.07) 0%, transparent 70%);
    animation: graphBg 5s ease-in-out infinite;
    pointer-events: none;
}
@keyframes graphBg {
    0%,100% { opacity: 0.6; transform: scale(1); }
    50%      { opacity: 1;   transform: scale(1.08); }
}
@keyframes fadeIn { to { opacity: 1; } }

.hero-graph {
    width: 100%;
    max-width: 400px;
    height: auto;
    overflow: visible;
}

/* ── SVG graph ── */
.hg-edge {
    stroke: rgba(94,170,162,0.22);
    stroke-width: 1.5;
    opacity: 0;
    stroke-dasharray: 4 10;
    transition: opacity 0.45s ease;
    animation: hgFlow 3.5s linear infinite;
}
.hg-edge-long { stroke: rgba(94,170,162,0.13); stroke-dasharray: 3 12; }
.hg-edge-out  { stroke: rgba(94,170,162,0.6); stroke-width: 2; stroke-dasharray: 5 7; animation-duration: 2.5s; }
@keyframes hgFlow { to { stroke-dashoffset: -14; } }

.hg-edges-l1.hg-drawn .hg-edge { opacity: 1; }
.hg-edges-l2.hg-drawn .hg-edge { opacity: 1; }
.hg-edges-l3.hg-drawn .hg-edge { opacity: 1; }

.hg-edges-l1.hg-drawn .hg-edge:nth-child(1) { transition-delay: 0.00s; }
.hg-edges-l1.hg-drawn .hg-edge:nth-child(2) { transition-delay: 0.06s; }
.hg-edges-l1.hg-drawn .hg-edge:nth-child(3) { transition-delay: 0.12s; }
.hg-edges-l1.hg-drawn .hg-edge:nth-child(4) { transition-delay: 0.18s; }
.hg-edges-l1.hg-drawn .hg-edge:nth-child(5) { transition-delay: 0.24s; }
.hg-edges-l1.hg-drawn .hg-edge:nth-child(6) { transition-delay: 0.30s; }
.hg-edges-l1.hg-drawn .hg-edge:nth-child(7) { transition-delay: 0.36s; }
.hg-edges-l1.hg-drawn .hg-edge:nth-child(8) { transition-delay: 0.42s; }
.hg-edges-l1.hg-drawn .hg-edge:nth-child(9) { transition-delay: 0.48s; }
.hg-edges-l2.hg-drawn .hg-edge:nth-child(1) { transition-delay: 0.00s; }
.hg-edges-l2.hg-drawn .hg-edge:nth-child(2) { transition-delay: 0.08s; }
.hg-edges-l2.hg-drawn .hg-edge:nth-child(3) { transition-delay: 0.16s; }
.hg-edges-l2.hg-drawn .hg-edge:nth-child(4) { transition-delay: 0.24s; }
.hg-edges-l3.hg-drawn .hg-edge:nth-child(1) { transition-delay: 0.00s; }
.hg-edges-l3.hg-drawn .hg-edge:nth-child(2) { transition-delay: 0.10s; }

.hg-node { opacity: 0; transition: opacity 0.45s ease; }
.hg-node.hg-vis { opacity: 1; }

.hg-nc {
    fill: var(--bg-card);
    stroke: rgba(94,170,162,0.45);
    stroke-width: 1.5;
    transform-box: fill-box;
    transform-origin: center;
    animation: hgNodePulse 4s ease-in-out infinite;
}
.hg-node-hot .hg-nc    { stroke: rgba(94,170,162,0.85); stroke-width: 2; animation-duration: 3s; }
.hg-node-gate .hg-nc   { stroke: rgba(94,170,162,0.65); stroke-width: 1.8; }
.hg-node-mmig .hg-nc   { stroke: rgba(94,170,162,0.9); stroke-width: 2; animation-duration: 2.8s; }
.hg-nc-out { fill: var(--accent); stroke: rgba(124,196,188,0.9); stroke-width: 2;
             animation: hgOutPulse 2s ease-in-out infinite; }
@keyframes hgNodePulse { 0%,100% { stroke-opacity:.45; } 50% { stroke-opacity:.9; } }
@keyframes hgOutPulse  { 0%,100% { filter: drop-shadow(0 0 5px rgba(94,170,162,0.5)); }
                         50%     { filter: drop-shadow(0 0 14px rgba(94,170,162,1)); } }

.hg-out-ring {
    fill: none;
    stroke: rgba(94,170,162,0.25);
    stroke-width: 1.5;
    transform-box: fill-box;
    transform-origin: center;
    animation: hgRingPulse 2.5s ease-in-out infinite;
}
@keyframes hgRingPulse { 0%,100% { transform: scale(1); stroke-opacity:.25; }
                         50%     { transform: scale(1.35); stroke-opacity:0; } }

.hg-lbl   { font-family: var(--font-mono); font-size: 9px; fill: rgba(94,170,162,0.65); text-anchor: middle; dominant-baseline: central; pointer-events: none; }
.hg-lbl-g { fill: rgba(124,196,188,0.85); font-size: 9px; }
.hg-lbl-m { fill: rgba(124,196,188,0.95); font-size: 8px; }
.hg-lbl-o { fill: #ede8e0; font-size: 9px; font-weight: 700; }
.hg-caption { font-family: var(--font-mono); font-size: 9px; fill: rgba(94,170,162,0.28); text-anchor: middle; }

/* Light mode graph */
[data-theme="light"] .hg-nc          { fill: #ffffff; stroke: rgba(79,53,224,0.5); }
[data-theme="light"] .hg-node-hot .hg-nc { stroke: rgba(79,53,224,0.85); }
[data-theme="light"] .hg-nc-out      { fill: #4f35e0; stroke: rgba(79,53,224,0.8); }
[data-theme="light"] .hg-edge        { stroke: rgba(79,53,224,0.22); }
[data-theme="light"] .hg-edge-long   { stroke: rgba(79,53,224,0.12); }
[data-theme="light"] .hg-edge-out    { stroke: rgba(79,53,224,0.6); }
[data-theme="light"] .hg-out-ring    { stroke: rgba(79,53,224,0.25); }
[data-theme="light"] .hg-lbl         { fill: rgba(79,53,224,0.6); }
[data-theme="light"] .hg-lbl-g       { fill: rgba(79,53,224,0.85); }
[data-theme="light"] .hg-lbl-m       { fill: rgba(79,53,224,0.95); }
[data-theme="light"] .hg-lbl-o       { fill: #ffffff; }
[data-theme="light"] .hg-caption     { fill: rgba(79,53,224,0.28); }
[data-theme="light"] .hero-right::before {
    background: radial-gradient(ellipse 60% 60% at 50% 52%, rgba(79,53,224,0.07) 0%, transparent 70%);
}
[data-theme="light"] .hero-status { color: #4f35e0; }
[data-theme="light"] .hero-status-dot { background: #4f35e0; animation: statusPulseLight 2s ease-in-out infinite; }
@keyframes statusPulseLight { 0%,100% { box-shadow: 0 0 0 0 rgba(79,53,224,0.6); } 50% { box-shadow: 0 0 0 6px rgba(79,53,224,0); } }
[data-theme="light"] .hero-kpis   { background: rgba(79,53,224,0.04); }

/* Responsive */
@media (max-width: 1000px) {
    .hero-inner { grid-template-columns: 1fr; gap: 2rem; min-height: auto; }
    .hero-right { display: none; }
    .hero-kpis  { align-self: auto; }
}
@media (max-width: 600px) {
    .hero-kpis  { flex-wrap: wrap; gap: var(--space-md); padding: var(--space-sm) var(--space-md); }
    .hero-kpi-rule { display: none; }
}


/* ═══════════════════════════════════════════
   Binary Separator  (prominent, wodniack-style)
   ═══════════════════════════════════════════ */

.binary-sep {
    position: relative;
    overflow: hidden;
    background: var(--binary-bg);
    border-top: 1px solid var(--accent-border);
    border-bottom: 1px solid var(--accent-border);
}

/* Diagonal stripe accents on each side */
.bin-triangle {
    position: absolute;
    top: 0; bottom: 0;
    width: 70px;
    z-index: 2;
    pointer-events: none;
}
.bin-triangle-l {
    left: 0;
    background: repeating-linear-gradient(
        -45deg,
        var(--stripe-color) 0px,
        var(--stripe-color) 1px,
        transparent 1px,
        transparent 7px
    );
    -webkit-mask-image: linear-gradient(90deg, rgba(0,0,0,0.8) 0%, transparent 100%);
    mask-image: linear-gradient(90deg, rgba(0,0,0,0.8) 0%, transparent 100%);
}
.bin-triangle-r {
    right: 0;
    background: repeating-linear-gradient(
        45deg,
        var(--stripe-color) 0px,
        var(--stripe-color) 1px,
        transparent 1px,
        transparent 7px
    );
    -webkit-mask-image: linear-gradient(270deg, rgba(0,0,0,0.8) 0%, transparent 100%);
    mask-image: linear-gradient(270deg, rgba(0,0,0,0.8) 0%, transparent 100%);
}

.bin-rows {
    padding: 0.9rem 5rem;
}

/* Horizontal stripe bar between code rows */
.bin-stripe-bar {
    height: 5px;
    width: 100%;
    background: repeating-linear-gradient(
        90deg,
        var(--stripe-color) 0,
        var(--stripe-color) 4px,
        transparent 4px,
        transparent 10px
    );
    margin: 3px 0;
    opacity: 0.7;
}

.bin-row {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--binary-color);
    letter-spacing: 0.16em;
    white-space: nowrap;
    line-height: 1.8;
    display: block;
    overflow: hidden;
}

.bin-row:nth-child(even) { opacity: 0.55; }

.bin-char { display: inline-block; }

.bin-char.lit {
    color: var(--binary-lit);
    text-shadow: 0 0 10px var(--accent);
}


/* ═══════════════════════════════════════════
   Buttons
   ═══════════════════════════════════════════ */

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.65rem 1.4rem;
    font-size: 0.85rem;
    font-weight: 500;
    font-family: var(--font-body);
    border-radius: 6px;
    border: 1.5px solid transparent;
    cursor: pointer;
    transition: all var(--duration) var(--ease);
    letter-spacing: 0.01em;
}

.btn-primary {
    background: var(--accent);
    color: #0a0000;
    border-color: var(--accent);
}
.btn-primary:hover {
    background: var(--accent-soft);
    border-color: var(--accent-soft);
    color: #0a0000;
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(94,170,162,0.3);
}

[data-theme="light"] .btn-primary       { color: #fff; }
[data-theme="light"] .btn-primary:hover { color: #fff; }

.btn-secondary {
    background: transparent;
    color: var(--text);
    border-color: var(--border-hover);
}
.btn-secondary:hover {
    border-color: var(--accent-border);
    color: var(--text);
    transform: translateY(-1px);
}

.btn-outline {
    background: transparent;
    color: var(--accent);
    border-color: var(--accent-border);
}
.btn-outline:hover {
    background: var(--accent-bg);
    border-color: var(--accent);
    color: var(--accent-soft);
    transform: translateY(-1px);
}


/* ═══════════════════════════════════════════
   Sections
   ═══════════════════════════════════════════ */

.section     { padding: var(--space-3xl) 0; }
.section-alt { background: var(--bg-alt); }

.section-header { margin-bottom: var(--space-2xl); }

.section-label {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--accent);
    letter-spacing: 0.1em;
    display: none;
    margin-bottom: var(--space-sm);
}

.section-title {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.025em;
    line-height: 1.1;
    overflow: hidden;
}

.section-subtitle {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-top: var(--space-sm);
}

.inline-link {
    color: var(--accent);
    border-bottom: 1px solid var(--accent-border);
    transition: border-color var(--duration) var(--ease);
}
.inline-link:hover { border-color: var(--accent); color: var(--accent-soft); }


/* ── Letter-by-letter animation on section titles ── */
.ltr {
    display: inline-block;
    opacity: 0;
    transform: translateY(60px);
    transition: opacity 0.45s var(--ease), transform 0.45s var(--ease);
}
.ltr-space { display: inline-block; width: 0.28em; }


/* ═══════════════════════════════════════════
   Hero — Mouse-parallax floats
   ═══════════════════════════════════════════ */

.hero-floats {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 1;
    overflow: hidden;
}

.hf {
    position: absolute;
    font-family: var(--font-mono);
    color: var(--accent);
    opacity: 0.09;
    user-select: none;
    will-change: transform;
    transform: translate(var(--tx, 0px), calc(var(--ty, 0px) + var(--sy, 0px)));
    transition: transform 0.22s ease-out;
}

.hf-1 { font-size: 0.85rem; left: 8%;  top: 26%; letter-spacing: 0.1em; }
.hf-2 { font-size: 2.8rem;  left: 83%; top: 16%; opacity: 0.07; }
.hf-3 { font-size: 0.68rem; left: 74%; top: 66%; letter-spacing: 0.25em; }
.hf-4 { font-size: 0.88rem; left: 17%; top: 74%; }
.hf-5 { font-size: 3.2rem;  left: 4%;  top: 52%; opacity: 0.05; }
.hf-6 { font-size: 0.64rem; left: 87%; top: 44%; letter-spacing: 0.18em; }
.hf-7 { font-size: 0.78rem; left: 55%; top: 13%; letter-spacing: 0.1em; }
.hf-8 { font-size: 2.5rem;  left: 44%; top: 73%; opacity: 0.06; }

@media (max-width: 768px) { .hero-floats { display: none; } }


/* ═══════════════════════════════════════════
   About — Stat counters
   ═══════════════════════════════════════════ */

.about-stats {
    display: flex;
    margin-bottom: var(--space-2xl);
    border: 1px solid var(--border);
    border-radius: 10px;
    overflow: hidden;
    background: var(--bg-card);
}

.stat-block {
    flex: 1;
    padding: 2rem 1.2rem;
    text-align: center;
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.6rem;
    transition: background var(--duration) var(--ease);
    position: relative;
}
.stat-block:last-child { border-right: none; }
.stat-block:hover { background: var(--bg-card-hover); }

.stat-block::after {
    content: '';
    position: absolute;
    bottom: 0; left: 20%; right: 20%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent-border), transparent);
    opacity: 0;
    transition: opacity var(--duration) var(--ease);
}
.stat-block:hover::after { opacity: 1; }

.stat-numrow {
    display: flex;
    align-items: baseline;
    gap: 2px;
    line-height: 1;
}

.count-up {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 3.5vw, 3rem);
    font-weight: 700;
    color: var(--accent);
    line-height: 1;
}

.stat-plus {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    color: var(--accent);
    line-height: 1;
}

.stat-desc {
    font-family: var(--font-mono);
    font-size: 0.63rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.07em;
    line-height: 1.6;
}

@media (max-width: 480px) {
    .about-stats  { flex-wrap: wrap; }
    .stat-block   { flex: 1 1 50%; border-bottom: 1px solid var(--border); }
    .stat-block:nth-child(even) { border-right: none; }
    .stat-block:nth-child(n+3)  { border-bottom: none; }
}


/* ═══════════════════════════════════════════
   About — Two-column panels
   ═══════════════════════════════════════════ */

.about-panels {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    align-items: start;
}

@media (max-width: 900px) {
    .about-panels { grid-template-columns: 1fr; }
}


/* ═══════════════════════════════════════════
   About — Terminal window
   ═══════════════════════════════════════════ */

.about-terminal {
    background: #06000d;
    border: 1px solid var(--border);
    border-radius: 10px;
    overflow: hidden;
    font-family: var(--font-mono);
    min-height: 300px;
}

[data-theme="light"] .about-terminal { background: #0f0a22; border-color: rgba(79,53,224,0.22); }

.term-titlebar {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 9px 14px;
    background: rgba(255, 255, 255, 0.03);
    border-bottom: 1px solid var(--border);
}

.term-dot {
    width: 11px; height: 11px;
    border-radius: 50%;
    flex-shrink: 0;
}
.tdot-r { background: #ff5f56; }
.tdot-y { background: #ffbd2e; }
.tdot-g { background: #27c93f; }

.term-name {
    font-size: 0.65rem;
    color: var(--text-muted);
    margin-left: 8px;
    letter-spacing: 0.04em;
}

.term-body {
    padding: 1.1rem 1.3rem;
    font-size: 0.78rem;
    line-height: 2;
    color: #a0c0b0;
    min-height: 260px;
}

.term-line { display: block; white-space: pre; }

.term-prompt { color: #5eaaa2; }
.term-cmd    { color: #ddd5c4; }
.term-out    { color: #7a9a88; }

.term-cur {
    display: inline-block;
    width: 7px; height: 0.88em;
    background: #5eaaa2;
    vertical-align: text-bottom;
    animation: blink 1s step-end infinite;
}


/* ═══════════════════════════════════════════
   About — Right column
   ═══════════════════════════════════════════ */

.about-right {
    display: flex;
    flex-direction: column;
    gap: 1.8rem;
}

/* Identity badges */
.about-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 0.55rem;
}

.id-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.45rem 0.9rem;
    border: 1px solid var(--border);
    border-radius: 100px;
    font-size: 0.78rem;
    color: var(--text-secondary);
    background: var(--bg-card);
    opacity: 0;
    transform: scale(0.85) translateY(10px);
    transition: opacity 0.45s cubic-bezier(0.34, 1.56, 0.64, 1),
                transform 0.45s cubic-bezier(0.34, 1.56, 0.64, 1),
                border-color var(--duration) var(--ease),
                background  var(--duration) var(--ease);
}

.id-badge.badge-show {
    opacity: 1;
    transform: scale(1) translateY(0);
}

.id-badge svg {
    width: 13px; height: 13px;
    color: var(--accent);
    flex-shrink: 0;
}

.id-badge:hover {
    border-color: var(--accent-border);
    background: var(--accent-bg);
    color: var(--text);
}

.id-badge-accent {
    border-color: var(--accent-border);
    background: var(--accent-bg);
    color: var(--accent);
}
.id-badge-accent svg { color: var(--accent-soft); }


/* Focus bars */
.about-focus {
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}

.focus-row {
    display: grid;
    grid-template-columns: 8.5rem 1fr;
    align-items: center;
    gap: 0.9rem;
}

.focus-label {
    font-family: var(--font-mono);
    font-size: 0.67rem;
    color: var(--text-muted);
    letter-spacing: 0.04em;
    text-align: right;
    white-space: nowrap;
}

.focus-track {
    height: 3px;
    background: var(--border);
    border-radius: 3px;
    overflow: hidden;
}

.focus-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--accent) 0%, var(--accent-soft) 100%);
    border-radius: 3px;
    transition: width 1.3s cubic-bezier(0.23, 1, 0.32, 1);
}


/* About bio paragraph */
.about-bio {
    margin-top: var(--space-xl);
    padding: var(--space-lg) var(--space-xl);
    border-left: 2px solid var(--accent-border);
    background: var(--accent-bg);
    border-radius: 0 8px 8px 0;
}

.about-bio p {
    font-size: 0.95rem;
    line-height: 1.75;
    color: var(--text-secondary);
    margin: 0;
}


/* ═══════════════════════════════════════════
   Research Interests
   ═══════════════════════════════════════════ */

.research-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: var(--space-md);
}

.research-chip {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    opacity: 0;
    transition: border-color var(--duration) var(--ease),
                background var(--duration) var(--ease),
                transform var(--duration) var(--ease),
                box-shadow var(--duration) var(--ease);
}
.research-chip.card-visible {
    animation: chipIn 0.5s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

@keyframes chipIn {
    0%   { opacity: 0; transform: scale(0.75) translateY(20px); }
    100% { opacity: 1; transform: scale(1) translateY(0); }
}

.research-chip:hover {
    border-color: var(--accent-border);
    background: var(--bg-card-hover);
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 8px 28px rgba(0,0,0,0.3);
}
.chip-icon {
    width: 17px; height: 17px;
    color: var(--accent);
    flex-shrink: 0;
}
.research-chip span {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text);
}


/* ═══════════════════════════════════════════
   Timeline / Experience
   ═══════════════════════════════════════════ */

/* ── Timeline v2 ───────────────────────────────────── */
.tl-wrap {
    position: relative;
    padding-left: 3.5rem;
}
.tl-wrap::before {
    content: '';
    position: absolute;
    left: 12px; top: 14px; bottom: 14px;
    width: 2px;
    background: linear-gradient(to bottom,
        var(--accent) 0%,
        rgba(94,170,162,0.35) 60%,
        transparent 100%);
    transform-origin: top center;
    transform: scaleY(0);
    transition: transform 1.4s cubic-bezier(0.22, 1, 0.36, 1);
}
.tl-wrap.tl-line-drawn::before {
    transform: scaleY(1);
}

/* Item */
.tl-item {
    position: relative;
    padding-bottom: var(--space-2xl);
    opacity: 0;
    transform: translateX(32px);
    transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
.tl-item:last-child { padding-bottom: 0; }
.tl-item.tl-show {
    opacity: 1;
    transform: translateX(0);
}

/* Per-type accent colours */
.tl-item[data-type="phd"]      { --tl-c: 94, 170, 162;  }
.tl-item[data-type="mtech"]    { --tl-c: 139, 125, 232; }
.tl-item[data-type="industry"] { --tl-c: 196, 154, 80;  }
.tl-item[data-type="be"]       { --tl-c: 107, 142, 154; }

/* Marker icon circle */
.tl-marker {
    position: absolute;
    left: -3.5rem;
    top: 0;
    width: 26px; height: 26px;
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    background: var(--bg-card);
    border: 2px solid rgba(var(--tl-c, 94,170,162), 0.7);
    color: rgb(var(--tl-c, 94,170,162));
    z-index: 2;
    transition: background 0.4s var(--ease), box-shadow 0.4s var(--ease);
}
.tl-marker svg { width: 12px; height: 12px; }
.tl-item.tl-show .tl-marker {
    background: rgba(var(--tl-c, 94,170,162), 0.12);
    box-shadow: 0 0 0 5px rgba(var(--tl-c, 94,170,162), 0.10),
                0 0 14px rgba(var(--tl-c, 94,170,162), 0.16);
}

/* Card */
.tl-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-left: 3px solid rgba(var(--tl-c, 94,170,162), 0.75);
    border-radius: 0 8px 8px 0;
    padding: var(--space-lg) var(--space-xl);
    transition: border-left-color 0.4s, box-shadow 0.4s;
}
.tl-item.tl-show .tl-card {
    border-left-color: rgb(var(--tl-c, 94,170,162));
    box-shadow: -4px 0 20px rgba(var(--tl-c, 94,170,162), 0.10),
                0 2px 16px rgba(0,0,0,0.18);
}
.tl-card:hover {
    border-left-color: rgb(var(--tl-c, 94,170,162));
    box-shadow: -4px 0 28px rgba(var(--tl-c, 94,170,162), 0.18),
                0 4px 24px rgba(0,0,0,0.22);
}

/* Top row */
.tl-top {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-bottom: var(--space-sm);
}
.tl-chip {
    font-family: var(--font-mono);
    font-size: 0.67rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: rgb(var(--tl-c, 94,170,162));
    border: 1px solid rgba(var(--tl-c, 94,170,162), 0.38);
    background: rgba(var(--tl-c, 94,170,162), 0.08);
    padding: 2px 10px;
    border-radius: 20px;
}
.tl-period {
    font-family: var(--font-mono);
    font-size: 0.73rem;
    color: var(--text-muted);
    margin-left: auto;
}

/* Role / org */
.tl-role {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text);
    line-height: 1.3;
    margin-bottom: 3px;
}
.tl-org {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
}

/* Details list */
.tl-details {
    list-style: none;
    margin-bottom: var(--space-md);
}
.tl-details li {
    position: relative;
    padding-left: 1.2rem;
    margin-bottom: var(--space-sm);
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.74;
}
.tl-details li::before {
    content: '';
    position: absolute;
    left: 0; top: 0.72em;
    width: 6px; height: 1px;
    background: rgba(var(--tl-c, 94,170,162), 0.65);
}

/* Skill tags */
.tl-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    padding-top: var(--space-sm);
    border-top: 1px solid var(--border);
}
.tl-tags span {
    font-family: var(--font-mono);
    font-size: 0.67rem;
    color: var(--text-muted);
    border: 1px solid var(--border);
    background: var(--bg);
    padding: 2px 9px;
    border-radius: 3px;
    transition: color 0.25s, border-color 0.25s, background 0.25s;
}
.tl-item.tl-show .tl-tags span:hover {
    color: rgb(var(--tl-c, 94,170,162));
    border-color: rgba(var(--tl-c, 94,170,162), 0.4);
    background: rgba(var(--tl-c, 94,170,162), 0.07);
}

/* Light mode adjustments */
[data-theme="light"] .tl-card      { background: #fefcff; }
[data-theme="light"] .tl-marker   { background: #ede8fa; }
[data-theme="light"] .tl-tags span { background: #f0ecf8; }


/* ═══════════════════════════════════════════
   Projects
   ═══════════════════════════════════════════ */

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--space-lg);
}

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: var(--space-xl);
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
    opacity: 0;
    transform-style: preserve-3d;
    will-change: transform;
    transition: border-color var(--duration) var(--ease),
                background var(--duration) var(--ease),
                box-shadow var(--duration) var(--ease);
}

/* Top accent line on hover */
.project-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent), var(--accent-soft), transparent);
    opacity: 0;
    transition: opacity 0.4s var(--ease);
    z-index: 1;
}

/* Mouse-tracking glow */
.project-card::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 10px;
    background: radial-gradient(
        420px circle at var(--mx, 50%) var(--my, 50%),
        rgba(94, 170, 162, 0.09) 0%,
        transparent 60%
    );
    opacity: 0;
    transition: opacity 0.4s ease;
    pointer-events: none;
}

.project-card.card-visible {
    animation: cardIn 0.75s cubic-bezier(0.23, 1, 0.32, 1) forwards;
}

@keyframes cardIn {
    0% {
        opacity: 0;
        transform: translateY(70px) scale(0.93) rotateX(6deg);
        filter: blur(4px);
    }
    60% {
        filter: blur(0px);
    }
    100% {
        opacity: 1;
        transform: translateY(0) scale(1) rotateX(0deg);
        filter: blur(0px);
    }
}

/* Hover: JS handles transform; CSS handles colour/glow */
.project-card:hover {
    border-color: var(--accent-border);
    background: var(--bg-card-hover);
}
.project-card:hover::before { opacity: 1; }
.project-card:hover::after  { opacity: 1; }

.project-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-md);
}
.project-tag {
    font-size: 0.68rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--accent);
    background: var(--accent-bg);
    padding: 3px 10px;
    border-radius: 4px;
    border: 1px solid var(--accent-border);
}
.project-hash {
    font-family: var(--font-mono);
    font-size: 0.62rem;
    color: var(--text-muted);
    letter-spacing: 0.06em;
}
.project-title {
    font-family: var(--font-heading);
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: var(--space-sm);
    line-height: 1.35;
}
.project-desc {
    font-size: 0.86rem;
    color: var(--text-secondary);
    line-height: 1.75;
    margin-bottom: var(--space-lg);
    flex: 1;
}
.project-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-sm);
}
.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
}
.project-tech span {
    font-family: var(--font-mono);
    font-size: 0.66rem;
    font-weight: 500;
    color: var(--text-muted);
    background: rgba(237,232,224,0.04);
    border: 1px solid var(--border);
    padding: 2px 8px;
    border-radius: 4px;
}
[data-theme="light"] .project-tech span { background: rgba(79,53,224,0.05); }

.project-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 30px; height: 30px;
    border-radius: 6px;
    border: 1px solid var(--border-hover);
    color: var(--text-muted);
    transition: all var(--duration) var(--ease);
    flex-shrink: 0;
}
.project-link svg  { width: 14px; height: 14px; }
.project-link:hover {
    border-color: var(--accent-border);
    color: var(--accent);
    background: var(--accent-bg);
}


/* ═══════════════════════════════════════════
   Projects — Editorial list
   ═══════════════════════════════════════════ */

.proj-list {
    display: flex;
    flex-direction: column;
}

.proj-item {
    display: grid;
    grid-template-columns: 5.5rem 1fr;
    gap: 2.5rem;
    padding: 3rem 0;
    border-bottom: 1px solid var(--border);
    position: relative;
    opacity: 0;
    transform: translateX(-32px);
    transition: border-color var(--duration) var(--ease);
}

.proj-item:first-child { border-top: 1px solid var(--border); }

.proj-item.proj-visible {
    animation: projIn 0.75s cubic-bezier(0.23, 1, 0.32, 1) forwards;
}

@keyframes projIn {
    from { opacity: 0; transform: translateX(-32px); }
    to   { opacity: 1; transform: translateX(0);     }
}

/* ── Left column ── */
.proj-lhs {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding-top: 0.25rem;
    gap: 0.7rem;
}

.proj-num {
    font-family: var(--font-heading);
    font-size: 2.4rem;
    font-weight: 700;
    color: var(--border);
    line-height: 1;
    letter-spacing: -0.03em;
    transition: color 0.4s var(--ease), text-shadow 0.4s var(--ease);
}

.proj-vline {
    width: 1px;
    flex: 1;
    min-height: 2rem;
    background: var(--border);
    transform: scaleY(0);
    transform-origin: top;
    transition: transform 0.7s cubic-bezier(0.23, 1, 0.32, 1),
                background 0.4s var(--ease);
}

.proj-item.proj-visible .proj-vline { transform: scaleY(1); }

.proj-item:hover .proj-num {
    color: var(--accent);
    text-shadow: 0 0 28px rgba(94, 170, 162, 0.4);
}
.proj-item:hover .proj-vline { background: var(--accent-border); }

/* ── Right column — split grid ── */
.proj-rhs {
    min-width: 0;
    display: grid;
    grid-template-columns: 1fr 270px;
    gap: var(--space-xl);
    align-items: start;
}
.proj-text { min-width: 0; }

/* ── Terminal preview panel ── */
.proj-preview {
    position: sticky;
    top: calc(var(--space-xl) + 1rem);
}
.proj-term {
    background: #05000c;
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
    font-family: var(--font-mono);
    font-size: 0.69rem;
    line-height: 1.75;
}
.proj-term-bar {
    background: rgba(255,255,255,0.035);
    border-bottom: 1px solid var(--border);
    padding: 7px 12px;
    display: flex;
    align-items: center;
    gap: 6px;
}
.ptdot {
    width: 10px; height: 10px;
    border-radius: 50%;
    flex-shrink: 0;
}
.ptdot-r { background: #ff5f57; }
.ptdot-y { background: #febc2e; }
.ptdot-g { background: #28c840; }
.proj-term-title {
    font-size: 0.62rem;
    color: var(--text-muted);
    margin-left: auto;
    letter-spacing: 0.04em;
}
.proj-term-body {
    padding: 14px 16px 16px;
}

/* Terminal line base — hidden until proj-visible */
.ptl {
    opacity: 0;
    transform: translateY(4px);
    transition: opacity 0.22s ease, transform 0.22s ease;
    white-space: pre;
    overflow: hidden;
}
/* Stagger each line when project scrolls in */
.proj-visible .ptl:nth-child(1)  { transition-delay: 0.20s; opacity:1; transform:none; }
.proj-visible .ptl:nth-child(2)  { transition-delay: 0.35s; opacity:1; transform:none; }
.proj-visible .ptl:nth-child(3)  { transition-delay: 0.50s; opacity:1; transform:none; }
.proj-visible .ptl:nth-child(4)  { transition-delay: 0.65s; opacity:1; transform:none; }
.proj-visible .ptl:nth-child(5)  { transition-delay: 0.80s; opacity:1; transform:none; }
.proj-visible .ptl:nth-child(6)  { transition-delay: 0.95s; opacity:1; transform:none; }
.proj-visible .ptl:nth-child(7)  { transition-delay: 1.10s; opacity:1; transform:none; }
.proj-visible .ptl:nth-child(8)  { transition-delay: 1.25s; opacity:1; transform:none; }
.proj-visible .ptl:nth-child(9)  { transition-delay: 1.40s; opacity:1; transform:none; }
.proj-visible .ptl:nth-child(10) { transition-delay: 1.55s; opacity:1; transform:none; }
.proj-visible .ptl:nth-child(11) { transition-delay: 1.70s; opacity:1; transform:none; }
.proj-visible .ptl:nth-child(12) { transition-delay: 1.85s; opacity:1; transform:none; }

/* Line type colours */
.ptl-cmd  { color: var(--accent-soft); }
.ptl-cmt  { color: var(--text-muted); font-style: italic; }
.ptl-dim  { color: var(--text-muted); }
.ptl-head { color: var(--text-secondary); font-weight: 600; }
.ptl-sep  { color: var(--border-hover); }
.ptl-row  { color: var(--text-secondary); }
.ptl-kw   { color: #8b7de8; }
.ptl-ok   { color: var(--accent-soft); }
.ptl-gap  { line-height: 0.6; }
.ptl-good { color: #5eaaa2; }
.ptl-warn { color: #c49a50; }
.ptl-fn   { color: #8bd4cd; }
.ptl-str  { color: #c49a50; }
.ptl-stat { display: flex; gap: 0.5rem; }
.ptl-k    { color: var(--text-muted); min-width: 6.5rem; }
.ptl-v    { }

/* Blinking cursor on last visible line */
.ptl-cur {
    display: inline-block;
    color: var(--accent);
    animation: blink 1s step-end infinite;
    opacity: 0;
}
.proj-visible .ptl-cur { opacity: 1; }

/* Hide preview on narrow screens */
@media (max-width: 1060px) {
    .proj-rhs      { grid-template-columns: 1fr; }
    .proj-preview  { display: none; }
}

.proj-meta {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.65rem;
    flex-wrap: wrap;
}

.proj-venue {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    color: var(--text-muted);
    letter-spacing: 0.04em;
}

.proj-status {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 2px 8px;
    border-radius: 4px;
    border: 1px solid;
}

.status-pub    { color: var(--accent); background: var(--accent-bg); border-color: var(--accent-border); }
.status-review { color: #c8a83a; background: rgba(200,168,58,0.08); border-color: rgba(200,168,58,0.28); }
.status-proto  { color: #7b9fd4; background: rgba(123,159,212,0.08); border-color: rgba(123,159,212,0.28); }

.proj-title {
    font-family: var(--font-heading);
    font-size: clamp(1.2rem, 2vw, 1.55rem);
    font-weight: 600;
    color: var(--text);
    line-height: 1.2;
    letter-spacing: -0.018em;
    margin-bottom: 0.9rem;
}

.proj-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.82;
    max-width: 54rem;
    margin-bottom: 1.5rem;
}

.proj-em {
    color: var(--accent-soft);
    font-weight: 600;
    font-style: normal;
}

/* Numerical metrics (project 01) */
.proj-metrics {
    display: flex;
    gap: 2.8rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.proj-metric { display: flex; flex-direction: column; gap: 0.25rem; }

.proj-metric-val {
    display: flex;
    align-items: baseline;
    gap: 1px;
    line-height: 1;
}

.proj-count {
    font-family: var(--font-heading);
    font-size: clamp(1.7rem, 2.6vw, 2.1rem);
    font-weight: 700;
    color: var(--accent);
    line-height: 1;
}

.mfx  { font-family: var(--font-heading); font-size: 1.2rem; color: var(--accent); line-height: 1; }
.msfx { font-family: var(--font-heading); font-size: 1rem;   color: var(--accent); line-height: 1; }

.proj-metric-val--text { align-items: center; }

.proj-metric-badge {
    font-family: var(--font-heading);
    font-size: clamp(1.7rem, 2.6vw, 2.1rem);
    font-weight: 700;
    color: var(--accent);
    line-height: 1;
    position: relative;
}

.proj-metric-badge-sup {
    font-size: 0.85rem;
    vertical-align: super;
    letter-spacing: 0.02em;
}

.proj-metric-lbl {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* Highlight bullets (projects 02–04) */
.proj-hls {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    margin-bottom: 1.5rem;
}

.proj-hl {
    display: flex;
    align-items: flex-start;
    gap: 0.6rem;
    font-size: 0.87rem;
    color: var(--text-secondary);
    line-height: 1.6;
    opacity: 0;
    transform: translateX(-12px);
    transition: opacity 0.4s var(--ease), transform 0.4s var(--ease);
}

.proj-hl.hl-show { opacity: 1; transform: translateX(0); }

.proj-hl svg {
    width: 14px; height: 14px;
    color: var(--accent);
    flex-shrink: 0;
    margin-top: 0.15rem;
}

/* Footer: stack + link */
.proj-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
}

.proj-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
}

.proj-stack span {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    font-weight: 500;
    color: var(--text-muted);
    background: rgba(237, 232, 224, 0.04);
    border: 1px solid var(--border);
    padding: 3px 9px;
    border-radius: 4px;
    transition: all var(--duration) var(--ease);
}

.proj-stack span:hover {
    background: var(--accent-bg);
    color: var(--accent);
    border-color: var(--accent-border);
}

[data-theme="light"] .proj-stack span { background: rgba(79,53,224,0.05); }

.proj-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-family: var(--font-mono);
    font-size: 0.76rem;
    font-weight: 500;
    color: var(--text-muted);
    border: 1px solid var(--border-hover);
    padding: 6px 14px;
    border-radius: 6px;
    white-space: nowrap;
    transition: all var(--duration) var(--ease);
}

.proj-link svg { width: 13px; height: 13px; }

.proj-link:hover {
    border-color: var(--accent-border);
    color: var(--accent);
    background: var(--accent-bg);
    transform: translateY(-1px);
}

@media (max-width: 640px) {
    .proj-item              { grid-template-columns: 3.2rem 1fr; gap: 1.2rem; padding: 2rem 0; }
    .proj-num               { font-size: 1.7rem; }
    .proj-metrics           { gap: 1.6rem; }
    .proj-count             { font-size: 1.5rem; }
    .proj-footer            { flex-direction: column; align-items: flex-start; }
}


/* ═══════════════════════════════════════════
   Publications
   ═══════════════════════════════════════════ */

.publications-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}
.pub-card {
    display: flex;
    gap: var(--space-lg);
    padding: var(--space-lg) var(--space-xl);
    border: 1px solid var(--border);
    border-left: 3px solid transparent;
    border-radius: 8px;
    background: var(--bg-card);
    opacity: 0;
    transition: border-color var(--duration) var(--ease),
                box-shadow var(--duration) var(--ease),
                background var(--duration) var(--ease);
}
.pub-card.card-visible {
    animation: pubIn 0.65s cubic-bezier(0.23, 1, 0.32, 1) forwards;
}

@keyframes pubIn {
    0% {
        opacity: 0;
        transform: translateX(-50px);
        border-left-color: var(--accent);
    }
    50% {
        border-left-color: var(--accent-border);
    }
    100% {
        opacity: 1;
        transform: translateX(0);
        border-left-color: transparent;
    }
}

.pub-card:hover {
    border-color: var(--accent-border);
    border-left-color: var(--accent);
    background: var(--bg-card-hover);
    box-shadow: 0 4px 28px rgba(0,0,0,0.3);
}
.pub-year {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--accent);
    white-space: nowrap;
    padding-top: 2px;
    min-width: 3rem;
}
.pub-body { flex: 1; }
.pub-title {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
    line-height: 1.42;
    margin-bottom: 4px;
}
.pub-authors {
    font-size: 0.84rem;
    color: var(--text-secondary);
    margin-bottom: 2px;
}
.pub-venue {
    font-size: 0.78rem;
    color: var(--accent);
    font-style: italic;
    margin-bottom: var(--space-sm);
    font-family: var(--font-mono);
}
.pub-links { display: flex; gap: var(--space-sm); }
.pub-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-muted);
    border: 1px solid var(--border);
    padding: 3px 10px;
    border-radius: 4px;
    transition: all var(--duration) var(--ease);
}
.pub-link svg { width: 12px; height: 12px; }
.pub-link:hover {
    color: var(--accent);
    border-color: var(--accent-border);
    background: var(--accent-bg);
}
.pub-cite {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-muted);
    padding: 3px 10px;
    border-radius: 4px;
    border: 1px solid var(--border);
}
.pub-cite svg { width: 11px; height: 11px; }

.pub-card-review {
    border-style: dashed;
    opacity: 0.7;
}
.pub-year-review {
    color: var(--text-muted);
    font-size: 1rem;
}
.pub-review-note {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--text-muted);
    font-size: 0.85rem;
    font-style: italic;
    margin: 0;
}
.pub-review-note svg { width: 14px; height: 14px; flex-shrink: 0; }


/* ═══════════════════════════════════════════
   Skills
   ═══════════════════════════════════════════ */

.skills-groups {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-xl);
}
.skills-group {
    padding: var(--space-xl);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    opacity: 0;
    transition: border-color var(--duration) var(--ease);
}
.skills-group.card-visible {
    animation: skillIn 0.6s cubic-bezier(0.23, 1, 0.32, 1) forwards;
}

@keyframes skillIn {
    0%   { opacity: 0; transform: translateY(40px); filter: blur(3px); }
    100% { opacity: 1; transform: translateY(0);    filter: blur(0); }
}

.skills-group:hover {
    border-color: var(--accent-border);
}
.skills-group-title {
    font-family: var(--font-heading);
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-sm);
    border-bottom: 1px solid var(--border);
}
.skills-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.skills-tags span {
    font-size: 0.8rem;
    color: var(--text-secondary);
    background: rgba(237,232,224,0.04);
    border: 1px solid var(--border);
    padding: 5px 14px;
    border-radius: 5px;
    transition: all var(--duration) var(--ease);
}
.skills-tags span:hover {
    background: var(--accent-bg);
    color: var(--accent);
    border-color: var(--accent-border);
}
[data-theme="light"] .skills-tags span { background: rgba(79,53,224,0.05); }


/* ═══════════════════════════════════════════
   Contact
   ═══════════════════════════════════════════ */

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: var(--space-md);
}
.contact-card {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-lg) var(--space-xl);
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg-card);
    transition: all var(--duration) var(--ease);
    color: var(--text);
}
.contact-card:hover {
    border-color: var(--accent-border);
    background: var(--bg-card-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(0,0,0,0.3);
    color: var(--text);
}
.contact-icon { width: 22px; height: 22px; color: var(--accent); flex-shrink: 0; }
.contact-label {
    font-size: 0.72rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted);
    margin-bottom: 2px;
}
.contact-value { font-size: 0.85rem; color: var(--text-secondary); }


/* ═══════════════════════════════════════════
   Footer
   ═══════════════════════════════════════════ */

.footer {
    padding: var(--space-xl) 0;
    border-top: 1px solid var(--border);
}
.footer-inner { text-align: center; }
.footer p {
    font-size: 0.78rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}
.footer-sep { color: var(--accent); margin: 0 0.5rem; }


/* ═══════════════════════════════════════════
   Scroll Reveal
   ═══════════════════════════════════════════ */

.reveal {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.65s var(--ease), transform 0.65s var(--ease);
}
.reveal.visible { opacity: 1; transform: translateY(0); }

@keyframes fadeInUp {
    to { opacity: 1; transform: translateY(0); }
}


/* ═══════════════════════════════════════════
   Responsive — Mobile
   ═══════════════════════════════════════════ */

@media (max-width: 768px) {

    html { scroll-padding-top: calc(var(--nav-height) + 1rem); }

    /* Sidebar becomes top bar */
    .sidebar {
        position: fixed;
        top: 0; left: 0; right: 0; bottom: auto;
        width: 100%;
        height: var(--nav-height);
        flex-direction: row;
        align-items: center;
        padding: 0 1rem;
        border-right: none;
        border-bottom: 1px solid var(--border);
        overflow: visible;
        gap: var(--space-md);
    }

    .sb-console  { display: none; }
    .sb-status   { display: none; }
    .sb-bottom   { display: none; }

    .sb-links {
        display: none;
        position: absolute;
        top: var(--nav-height);
        left: 0; right: 0;
        background: var(--bg);
        border-bottom: 1px solid var(--border);
        padding: 1rem;
        flex-direction: column;
        gap: 0.2rem;
        box-shadow: 0 8px 32px rgba(0,0,0,0.4);
    }
    .sb-links.open { display: flex; }

    .sb-hamburger {
        display: flex;
        margin-left: auto;
    }

    /* Show minimal actions in mobile top bar */
    .sb-bottom {
        display: flex;
        margin: 0;
        margin-left: auto;
    }
    .sb-status { display: none; }
    .sb-actions {
        display: flex;
        gap: 0.3rem;
    }
    .sb-icon { width: 28px; height: 28px; }

    .main-content {
        margin-left: 0;
        padding-top: var(--nav-height);
    }

    .hero          { min-height: 80vh; }
    .hero-binary   { display: none; }
    .hero-content  { padding: var(--space-2xl) 0; }
    .hero-name     { font-size: clamp(2.6rem, 10vw, 4rem); }

    .section       { padding: var(--space-2xl) 0; }
    .container     { padding: 0 var(--space-lg); }

    .tl-wrap           { padding-left: 2.2rem; }
    .tl-marker         { left: -2.2rem; width: 20px; height: 20px; }
    .tl-marker svg     { width: 10px; height: 10px; }
    .tl-card           { padding: var(--space-md); }
    .tl-period         { margin-left: 0; width: 100%; }
    .projects-grid     { grid-template-columns: 1fr; }
    .pub-card          { flex-direction: column; gap: var(--space-sm); }
    .pub-year          { min-width: auto; }
    .skills-groups     { grid-template-columns: 1fr; }
    .contact-grid      { grid-template-columns: 1fr; }
    .research-grid     { grid-template-columns: 1fr; }

    .bin-rows { padding: 0.8rem 3rem; }
}

@media (max-width: 480px) {
    html { font-size: 15px; }
    .hero-name      { font-size: 2.4rem; }
    .hero-actions   { flex-direction: column; }
    .hero-actions .btn { width: 100%; justify-content: center; }
    .bin-rows       { padding: 0.6rem 1.5rem; }
}


/* ═══════════════════════════════════════════
   Light Mode — Element Polish
   ═══════════════════════════════════════════ */

/* Hero: indigo radial glow instead of flat bg */
[data-theme="light"] .hero {
    background:
        radial-gradient(ellipse 70% 60% at 65% 30%, rgba(79,53,224,0.07) 0%, transparent 70%),
        radial-gradient(ellipse 40% 50% at 20% 80%, rgba(79,53,224,0.04) 0%, transparent 60%),
        var(--bg);
}

/* Alt sections get a very soft lavender wash */
[data-theme="light"] .section-alt {
    background: linear-gradient(160deg, #f0ecfa 0%, #faf8ff 60%, #f5f0ff 100%);
}

/* Sidebar — white with subtle indigo right border */
[data-theme="light"] .sidebar {
    background: #ffffff;
    border-right-color: rgba(79,53,224,0.12);
    box-shadow: 2px 0 20px rgba(79,53,224,0.06);
}

/* Console badge in indigo tint */
[data-theme="light"] .sb-console {
    border-color: rgba(79,53,224,0.28);
    background: rgba(79,53,224,0.06);
    color: #4f35e0;
}

/* Section number labels get indigo */
[data-theme="light"] .section-label {
    color: rgba(79,53,224,0.35);
}

/* Hero binary strip */
[data-theme="light"] .hero-binary {
    background: var(--binary-bg);
}

/* Project terminal windows — dark indigo bg, not pure black */
[data-theme="light"] .proj-term {
    background: #0f0a22;
    border-color: rgba(79,53,224,0.20);
}
[data-theme="light"] .proj-term-bar {
    background: rgba(79,53,224,0.12);
    border-bottom-color: rgba(79,53,224,0.18);
}

/* Publication cards */
[data-theme="light"] .pub-card {
    background: #fefcff;
    border-color: rgba(20,13,46,0.08);
}
[data-theme="light"] .pub-card:hover {
    border-color: rgba(79,53,224,0.25);
    box-shadow: 0 4px 20px rgba(79,53,224,0.09);
}

/* Research chips */
[data-theme="light"] .research-chip {
    background: #fefcff;
    border-color: rgba(79,53,224,0.14);
}
[data-theme="light"] .research-chip:hover {
    border-color: rgba(79,53,224,0.35);
    background: rgba(79,53,224,0.06);
}

/* Contact cards */
[data-theme="light"] .contact-card {
    background: #fefcff;
    border-color: rgba(79,53,224,0.12);
}
[data-theme="light"] .contact-card:hover {
    border-color: rgba(79,53,224,0.30);
    box-shadow: 0 6px 24px rgba(79,53,224,0.10);
}

/* Focus bars */
[data-theme="light"] .focus-track {
    background: rgba(79,53,224,0.08);
}

/* About stats */
[data-theme="light"] .stat-block {
    border-color: rgba(79,53,224,0.14);
}

/* Footer */
[data-theme="light"] .footer {
    border-top-color: rgba(79,53,224,0.12);
    background: #fefdf8;
}