/* ==========================================================================
   tnhec.com -- Pixel-Art Corporate Archaeology
   Translucent frost panels over drifting gradient mesh.
   ========================================================================== */

:root {
    --deep-bg: #0D1B2A;
    --frost-surface: #DCE8F5;
    --frost-border: rgba(255, 255, 255, 0.4);
    --primary-text: #1A2A3A;
    --secondary-text: #4A6E8C;
    --body-text: #2C3E50;
    --accent-warm: #E8A87C;
    --accent-cool: #7B9EBC;
    --pixel-highlight: #F0C674;
    --mesh-a: #C5D5E8;
    --mesh-b: #E8D5C5;
    --error: #D4756B;

    --frost-bg: rgba(220, 232, 245, 0.35);
    --frost-bg-hover: rgba(220, 232, 245, 0.45);
    --frost-blur: 16px;
    --frost-blur-hover: 24px;

    --spine-x: clamp(40px, 8vw, 120px);
    --panel-offset: clamp(80px, 15vw, 200px);
    --panel-max: clamp(600px, 55vw, 900px);
    --panel-pad: clamp(24px, 3vw, 48px);

    --font-display: 'Silkscreen', 'Press Start 2P', monospace;
    --font-pixel: 'Press Start 2P', monospace;
    --font-body: 'IBM Plex Sans', system-ui, sans-serif;
    --font-mono: 'IBM Plex Mono', ui-monospace, monospace;

    --ease-morph: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-spring: cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: clamp(0.95rem, 1.1vw, 1.15rem);
    line-height: 1.72;
    letter-spacing: 0.01em;
    color: var(--body-text);
    background: var(--deep-bg);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

body.boot {
    /* Initial dark state until JS triggers reveal */
}

/* ==========================================================================
   Gradient Mesh Background
   ========================================================================== */

.mesh-layer {
    position: fixed;
    inset: 0;
    z-index: 0;
    overflow: hidden;
    background: var(--deep-bg);
    opacity: 0;
    transition: opacity 1s ease-out;
}

body.mesh-on .mesh-layer {
    opacity: 1;
}

.mesh-field {
    position: absolute;
    inset: -20%;
    filter: blur(60px);
    will-change: transform;
}

.mesh-a {
    background: radial-gradient(circle at 30% 20%, var(--mesh-a) 0%, transparent 55%);
    animation: meshDrift 45s ease-in-out infinite;
}

.mesh-b {
    background: radial-gradient(circle at 70% 60%, var(--mesh-b) 0%, transparent 55%);
    animation: meshDrift 52s ease-in-out infinite reverse;
    animation-delay: -10s;
}

.mesh-c {
    background:
        radial-gradient(circle at 50% 90%, var(--accent-cool) 0%, transparent 50%),
        conic-gradient(from 180deg at 50% 50%, var(--deep-bg), transparent 30%, transparent 70%, var(--deep-bg));
    opacity: 0.45;
    animation: meshDrift 60s ease-in-out infinite;
    animation-delay: -25s;
}

@keyframes meshDrift {
    0%, 100% { transform: translate(0%, 0%) scale(1); }
    25% { transform: translate(6%, -4%) scale(1.05); }
    50% { transform: translate(-5%, 7%) scale(0.98); }
    75% { transform: translate(4%, 5%) scale(1.03); }
}

/* ==========================================================================
   Top Navigation
   ========================================================================== */

.topnav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 48px;
    z-index: 50;
    background: rgba(220, 232, 245, 0.25);
    backdrop-filter: blur(16px) saturate(1.3);
    -webkit-backdrop-filter: blur(16px) saturate(1.3);
    border-bottom: 1px solid var(--frost-border);
    transition: backdrop-filter 0.3s ease, background 0.3s ease;
    transform: translateY(-100%);
    opacity: 0;
    transition: transform 0.6s var(--ease-morph), opacity 0.6s ease, backdrop-filter 0.3s ease, background 0.3s ease;
}

body.mesh-on .topnav {
    transform: translateY(0);
    opacity: 1;
}

.topnav.scrolled {
    background: rgba(220, 232, 245, 0.35);
    backdrop-filter: blur(24px) saturate(1.4);
    -webkit-backdrop-filter: blur(24px) saturate(1.4);
}

.topnav-inner {
    height: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 clamp(16px, 3vw, 32px);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-mark {
    font-family: var(--font-pixel);
    font-size: 0.7rem;
    color: var(--primary-text);
    text-decoration: none;
    letter-spacing: 0.15em;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: clamp(12px, 2.5vw, 28px);
}

.nav-links a {
    font-family: var(--font-pixel);
    font-size: 0.55rem;
    color: var(--secondary-text);
    text-decoration: none;
    letter-spacing: 0.12em;
    transition: color 0.2s ease;
    position: relative;
}

.nav-links a:hover {
    color: var(--accent-warm);
}

/* ==========================================================================
   Timeline Spine
   ========================================================================== */

.timeline-spine {
    position: fixed;
    top: 0;
    bottom: 0;
    left: var(--spine-x);
    width: 24px;
    z-index: 5;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.8s ease;
}

body.mesh-on .timeline-spine {
    opacity: 1;
}

.spine-line {
    position: absolute;
    top: 80px;
    bottom: 80px;
    left: 11px;
    width: 2px;
    background-image: linear-gradient(to bottom, var(--accent-cool) 50%, transparent 50%);
    background-size: 2px 8px;
    background-repeat: repeat-y;
    transform-origin: top;
    transform: scaleY(var(--spine-progress, 0));
    transition: transform 0.05s linear;
}

.spine-nodes {
    position: absolute;
    inset: 0;
}

.spine-node {
    position: absolute;
    left: 0;
    width: 24px;
    height: 24px;
    transform: translateY(-50%);
    transition: transform 0.4s var(--ease-morph), filter 0.4s ease;
}

.spine-node.active {
    filter: drop-shadow(0 0 6px rgba(232, 168, 124, 0.6));
}

.spine-node svg {
    width: 100%;
    height: 100%;
    image-rendering: pixelated;
    shape-rendering: crispEdges;
}

@keyframes nodeMorph {
    0%, 100% { transform: rotate(0deg); }
    33% { transform: rotate(120deg); }
    66% { transform: rotate(240deg); }
}

.spine-node.active svg {
    animation: nodeMorph 2s ease-in-out infinite;
}

.spine-node:not(.active) svg {
    animation: nodeMorph 4s ease-in-out infinite;
}

/* ==========================================================================
   Timeline + Chapters
   ========================================================================== */

.timeline {
    position: relative;
    z-index: 10;
    padding-top: 48px;
}

.chapter {
    position: relative;
    min-height: 80vh;
    padding: clamp(40px, 6vw, 80px) clamp(16px, 4vw, 48px);
    padding-left: var(--panel-offset);
    display: flex;
    align-items: center;
}

.chapter-hero {
    min-height: 100vh;
    justify-content: center;
    padding-left: clamp(16px, 4vw, 48px);
}

.frost-panel {
    background: var(--frost-bg);
    backdrop-filter: blur(var(--frost-blur)) saturate(1.3);
    -webkit-backdrop-filter: blur(var(--frost-blur)) saturate(1.3);
    border: 1px solid var(--frost-border);
    max-width: var(--panel-max);
    width: 100%;
    padding: var(--panel-pad);
    position: relative;
    transition: backdrop-filter 0.3s ease, background 0.3s ease, transform 0.6s var(--ease-morph);
    box-shadow:
        0 8px 32px rgba(13, 27, 42, 0.18),
        inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

.chapter:not(.chapter-hero) .frost-panel {
    clip-path: inset(50%);
    opacity: 0;
    transition: clip-path 0.6s var(--ease-morph), opacity 0.5s ease;
}

.chapter.in-view:not(.chapter-hero) .frost-panel {
    clip-path: inset(0%);
    opacity: 1;
}

.frost-panel:hover {
    background: var(--frost-bg-hover);
    backdrop-filter: blur(var(--frost-blur-hover)) saturate(1.4);
    -webkit-backdrop-filter: blur(var(--frost-blur-hover)) saturate(1.4);
}

.chapter-hero .frost-panel {
    clip-path: inset(50%);
    text-align: center;
    padding: clamp(40px, 6vw, 80px) clamp(32px, 5vw, 64px);
    max-width: clamp(420px, 65vw, 720px);
    transition: clip-path 0.8s var(--ease-morph);
}

body.mesh-on .chapter-hero .frost-panel {
    clip-path: inset(0%);
}

/* ==========================================================================
   Hero Wordmark
   ========================================================================== */

.wordmark {
    display: flex;
    justify-content: center;
    gap: clamp(4px, 1vw, 12px);
    margin-bottom: clamp(20px, 3vw, 40px);
    image-rendering: pixelated;
}

.wm-letter {
    display: inline-block;
    width: clamp(40px, 7vw, 80px);
    height: clamp(48px, 9vw, 96px);
    background-color: var(--primary-text);
    background-repeat: no-repeat;
    background-size: 100% 100%;
    image-rendering: pixelated;
    opacity: 0;
    transform: translateY(-8px);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

body.mesh-on .wm-letter {
    opacity: 1;
    transform: translateY(0);
}

.wm-letter[data-letter="T"] {
    --pix:
        linear-gradient(var(--primary-text), var(--primary-text));
    background:
        /* horizontal top bar */
        linear-gradient(var(--primary-text), var(--primary-text)) 0 0/100% 16.67% no-repeat,
        /* vertical center bar */
        linear-gradient(var(--primary-text), var(--primary-text)) 50% 0/16.67% 100% no-repeat,
        transparent;
}

.wm-letter[data-letter="N"] {
    background:
        linear-gradient(var(--primary-text), var(--primary-text)) 0 0/16.67% 100% no-repeat,
        linear-gradient(var(--primary-text), var(--primary-text)) 100% 0/16.67% 100% no-repeat,
        linear-gradient(135deg, transparent 33%, var(--primary-text) 33%, var(--primary-text) 50%, transparent 50%) 0 0/100% 100% no-repeat,
        transparent;
}

.wm-letter[data-letter="H"] {
    background:
        linear-gradient(var(--primary-text), var(--primary-text)) 0 0/16.67% 100% no-repeat,
        linear-gradient(var(--primary-text), var(--primary-text)) 100% 0/16.67% 100% no-repeat,
        linear-gradient(var(--primary-text), var(--primary-text)) 0 50%/100% 16.67% no-repeat,
        transparent;
}

.wm-letter[data-letter="E"] {
    background:
        linear-gradient(var(--primary-text), var(--primary-text)) 0 0/16.67% 100% no-repeat,
        linear-gradient(var(--primary-text), var(--primary-text)) 0 0/100% 16.67% no-repeat,
        linear-gradient(var(--primary-text), var(--primary-text)) 0 50%/85% 16.67% no-repeat,
        linear-gradient(var(--primary-text), var(--primary-text)) 0 100%/100% 16.67% no-repeat,
        transparent;
}

.wm-letter[data-letter="C"] {
    background:
        linear-gradient(var(--primary-text), var(--primary-text)) 0 0/16.67% 100% no-repeat,
        linear-gradient(var(--primary-text), var(--primary-text)) 0 0/100% 16.67% no-repeat,
        linear-gradient(var(--primary-text), var(--primary-text)) 0 100%/100% 16.67% no-repeat,
        transparent;
}

.hero-tagline {
    font-family: var(--font-body);
    font-size: 0.9rem;
    color: var(--secondary-text);
    margin-bottom: clamp(16px, 2.5vw, 28px);
    letter-spacing: 0.02em;
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 0.6s ease, transform 0.6s ease;
    transition-delay: 0.6s;
}

body.mesh-on .hero-tagline {
    opacity: 1;
    transform: translateY(0);
}

.hero-meta {
    display: inline-flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent-cool);
    letter-spacing: 0.1em;
    padding: 8px 16px;
    border: 1px dashed rgba(123, 158, 188, 0.4);
    opacity: 0;
    transition: opacity 0.6s ease;
    transition-delay: 0.9s;
}

body.mesh-on .hero-meta {
    opacity: 1;
}

.meta-label {
    color: var(--secondary-text);
    font-weight: 500;
}

.meta-value {
    color: var(--accent-warm);
}

.meta-divider {
    color: var(--accent-cool);
    opacity: 0.5;
}

/* ==========================================================================
   Chapter Typography
   ========================================================================== */

.chapter-tag {
    font-family: var(--font-pixel);
    font-size: clamp(0.6rem, 1.2vw, 0.75rem);
    color: var(--secondary-text);
    text-transform: uppercase;
    letter-spacing: 0.18em;
    margin-bottom: clamp(12px, 2vw, 20px);
    padding-bottom: 8px;
    border-bottom: 1px dashed rgba(123, 158, 188, 0.3);
}

.chapter-heading {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(1.4rem, 3.5vw, 2.8rem);
    letter-spacing: 0.06em;
    color: var(--primary-text);
    line-height: 1.15;
    margin-bottom: clamp(16px, 2.5vw, 28px);
}

.lede {
    font-size: clamp(1.05rem, 1.3vw, 1.25rem);
    color: var(--primary-text);
    margin-bottom: clamp(16px, 2vw, 24px);
    font-weight: 400;
}

.frost-panel p {
    margin-bottom: 1.2em;
    color: var(--body-text);
}

.frost-panel p:last-child {
    margin-bottom: 0;
}

.spot-icon {
    width: 32px;
    height: 32px;
    vertical-align: middle;
    margin: 0 6px;
    image-rendering: pixelated;
    transform: scale(0);
    transition: transform 0.5s var(--ease-spring);
}

.in-view .spot-icon {
    transform: scale(1);
}

.mono-accent {
    font-family: var(--font-mono);
    font-size: 0.85em;
    color: var(--accent-cool);
}

/* ==========================================================================
   Divider Pattern
   ========================================================================== */

.divider-pattern {
    height: 16px;
    margin: clamp(20px, 3vw, 36px) 0;
    background-image:
        linear-gradient(90deg, transparent 0, transparent 4px, rgba(123, 158, 188, 0.4) 4px, rgba(123, 158, 188, 0.4) 8px, transparent 8px, transparent 16px),
        linear-gradient(90deg, transparent 0, transparent 12px, rgba(123, 158, 188, 0.25) 12px, rgba(123, 158, 188, 0.25) 14px, transparent 14px);
    background-size: 16px 100%, 16px 100%;
    background-repeat: repeat-x;
    background-position: 0 50%;
    image-rendering: pixelated;
}

/* ==========================================================================
   Doctrine list
   ========================================================================== */

.doctrine-list {
    list-style: none;
    display: grid;
    gap: 12px;
}

.doctrine-list li {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.18);
    border-left: 3px solid var(--accent-warm);
    transition: background 0.3s ease, transform 0.3s ease;
}

.doctrine-list li:hover {
    background: rgba(255, 255, 255, 0.28);
    transform: translateX(4px);
}

.doctrine-num {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--accent-warm);
    font-weight: 500;
    min-width: 28px;
}

.doctrine-text {
    font-family: var(--font-body);
    color: var(--primary-text);
    font-size: 0.98rem;
}

/* ==========================================================================
   Practice Grid
   ========================================================================== */

.practice-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: clamp(12px, 2vw, 20px);
    margin-top: clamp(16px, 2vw, 24px);
}

.practice-card {
    padding: clamp(16px, 2vw, 24px);
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    transition: background 0.3s ease, transform 0.3s ease, border-color 0.3s ease;
    position: relative;
}

.practice-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 8px;
    height: 8px;
    background: var(--accent-warm);
}

.practice-card:hover {
    background: rgba(255, 255, 255, 0.32);
    border-color: var(--accent-warm);
    transform: translateY(-4px);
}

.practice-icon {
    width: 48px;
    height: 48px;
    image-rendering: pixelated;
    margin-bottom: 12px;
    display: block;
}

.practice-title {
    font-family: var(--font-pixel);
    font-size: 0.7rem;
    color: var(--secondary-text);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin-bottom: 8px;
}

.practice-desc {
    font-size: 0.92rem;
    color: var(--body-text);
    line-height: 1.55;
    margin: 0;
}

/* ==========================================================================
   Data Chapter
   ========================================================================== */

.data-intro {
    color: var(--body-text);
    margin-bottom: clamp(20px, 3vw, 36px);
}

.data-block {
    margin-bottom: clamp(24px, 3vw, 40px);
    padding: clamp(16px, 2vw, 24px);
    background: rgba(13, 27, 42, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.25);
}

.data-block:last-child {
    margin-bottom: 0;
}

.data-label {
    font-family: var(--font-pixel);
    font-size: 0.6rem;
    color: var(--secondary-text);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 1px dashed rgba(123, 158, 188, 0.3);
}

/* Bar chart */
.bar-chart {
    display: grid;
    grid-template-columns: repeat(19, 1fr);
    gap: 4px;
    align-items: end;
    height: 180px;
    image-rendering: pixelated;
}

.bar-column {
    display: flex;
    flex-direction: column-reverse;
    gap: 2px;
    height: 100%;
    justify-content: flex-start;
}

.bar-block {
    width: 100%;
    aspect-ratio: 1;
    max-height: 12px;
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.in-view .bar-block.appear {
    opacity: 1;
    transform: translateY(0);
}

.bar-chart-axis {
    display: grid;
    grid-template-columns: repeat(19, 1fr);
    gap: 4px;
    margin-top: 8px;
    font-family: var(--font-mono);
    font-size: 0.55rem;
    color: var(--accent-cool);
    text-align: center;
}

.axis-tick {
    transform: rotate(-45deg);
    transform-origin: center;
    white-space: nowrap;
}

/* Metric strips */
.metric-rows {
    display: grid;
    gap: 12px;
}

.metric-row {
    display: grid;
    grid-template-columns: clamp(120px, 18vw, 180px) 1fr clamp(40px, 5vw, 56px);
    align-items: center;
    gap: clamp(8px, 1.5vw, 16px);
}

.metric-name {
    font-family: var(--font-pixel);
    font-size: 0.55rem;
    color: var(--secondary-text);
    letter-spacing: 0.1em;
}

.strip {
    display: grid;
    grid-template-columns: repeat(10, 1fr);
    gap: 3px;
    height: 16px;
}

.strip-segment {
    background: var(--frost-surface);
    border: 1px solid rgba(123, 158, 188, 0.3);
    opacity: 0;
    transform: scale(0.6);
    transition: opacity 0.2s ease, transform 0.3s var(--ease-spring), background 0.3s ease;
}

.in-view .strip-segment.appear {
    opacity: 1;
    transform: scale(1);
}

.strip-segment.filled {
    background: var(--pixel-highlight);
    border-color: var(--accent-warm);
}

.metric-value {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--accent-warm);
    font-weight: 500;
    text-align: right;
}

/* Heatmap */
.heatmap {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 3px;
    image-rendering: pixelated;
    margin-bottom: 12px;
}

.heat-cell {
    aspect-ratio: 1;
    opacity: 0;
    transform: scale(0.4);
    transition: opacity 0.25s ease, transform 0.4s var(--ease-spring);
}

.in-view .heat-cell.appear {
    opacity: 1;
    transform: scale(1);
}

.heatmap-legend {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--accent-cool);
}

.legend-gradient {
    flex: 1;
    height: 8px;
    background: linear-gradient(90deg,
        var(--frost-surface) 0%,
        var(--accent-cool) 30%,
        var(--accent-warm) 70%,
        var(--pixel-highlight) 100%);
    image-rendering: pixelated;
}

/* ==========================================================================
   Milestone Inventory Grid
   ========================================================================== */

.milestone-intro {
    color: var(--body-text);
    margin-bottom: clamp(20px, 3vw, 32px);
}

.inventory-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: clamp(12px, 2vw, 20px);
}

.milestone-tile {
    background: var(--deep-bg);
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 12px;
    text-align: center;
    cursor: pointer;
    filter: brightness(0.3) grayscale(1);
    transition: filter 0.5s ease, box-shadow 0.4s ease, border-color 0.4s ease, border-radius 0.3s ease, transform 0.3s ease;
    position: relative;
    overflow: hidden;
}

.milestone-tile.unlocked {
    filter: brightness(1) grayscale(0);
    border-color: rgba(232, 168, 124, 0.3);
    box-shadow: 0 0 12px rgba(240, 198, 116, 0.5);
    animation: tilePulse 0.3s ease-out;
}

@keyframes tilePulse {
    0% { border-radius: 0; }
    50% { border-radius: 4px; transform: scale(1.02); }
    100% { border-radius: 0; transform: scale(1); }
}

.milestone-tile:hover.unlocked {
    filter: brightness(1.15) grayscale(0);
    box-shadow: 0 0 18px rgba(240, 198, 116, 0.7);
    transform: translateY(-3px);
}

.tile-art {
    width: 64px;
    height: 64px;
    margin: 0 auto 10px;
    image-rendering: pixelated;
}

.tile-art svg {
    width: 100%;
    height: 100%;
    display: block;
}

.tile-label {
    font-family: var(--font-pixel);
    font-size: 0.5rem;
    color: var(--frost-surface);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 4px;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.tile-year {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--pixel-highlight);
    letter-spacing: 0.08em;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.milestone-tile.unlocked .tile-label,
.milestone-tile.unlocked .tile-year {
    opacity: 1;
}

/* ==========================================================================
   Contact / Final Chapter
   ========================================================================== */

.contact-grid {
    display: grid;
    gap: 12px;
    margin-top: clamp(20px, 3vw, 32px);
    margin-bottom: clamp(20px, 3vw, 32px);
}

.contact-row {
    display: grid;
    grid-template-columns: clamp(120px, 16vw, 160px) 1fr;
    gap: 16px;
    padding: 12px 0;
    border-bottom: 1px dashed rgba(123, 158, 188, 0.3);
    align-items: baseline;
}

.contact-label {
    font-family: var(--font-pixel);
    font-size: 0.55rem;
    color: var(--secondary-text);
    letter-spacing: 0.15em;
}

.contact-value {
    font-family: var(--font-mono);
    font-size: 0.92rem;
    color: var(--primary-text);
    letter-spacing: 0.02em;
}

.footer-note {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--secondary-text);
    text-align: center;
    letter-spacing: 0.04em;
    padding-top: 8px;
}

/* ==========================================================================
   Scroll-to-Top Button
   ========================================================================== */

.scroll-top {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: 1px solid var(--frost-border);
    background: var(--frost-bg);
    backdrop-filter: blur(16px) saturate(1.3);
    -webkit-backdrop-filter: blur(16px) saturate(1.3);
    cursor: pointer;
    z-index: 40;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transform: scale(0.6);
    transition: opacity 0.4s ease, transform 0.4s var(--ease-spring), background 0.3s ease;
}

.scroll-top.visible {
    opacity: 1;
    transform: scale(1);
}

.scroll-top:hover {
    background: var(--frost-bg-hover);
}

.scroll-top svg {
    width: 28px;
    height: 28px;
    image-rendering: pixelated;
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 720px) {
    :root {
        --spine-x: 28px;
        --panel-offset: 60px;
    }

    .nav-links {
        gap: 10px;
    }

    .nav-links a {
        font-size: 0.5rem;
    }

    .bar-chart {
        height: 140px;
    }

    .metric-row {
        grid-template-columns: 1fr;
        gap: 6px;
    }

    .contact-row {
        grid-template-columns: 1fr;
        gap: 4px;
    }

    .practice-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .topnav-inner {
        padding: 0 12px;
    }

    .nav-links {
        gap: 8px;
    }

    .nav-links li:nth-child(n+3) {
        display: none;
    }

    .wm-letter {
        width: 32px;
        height: 40px;
    }

    .hero-meta {
        font-size: 0.65rem;
    }
}