/* ========================================
   SO-101 India Build Guide
   Anthropic.com design — exact replica
   ======================================== */

@import url('https://fonts.googleapis.com/css2?family=Source+Serif+4:ital,opsz,wght@0,8..60,300;0,8..60,400;0,8..60,500;0,8..60,600;0,8..60,700;0,8..60,800;0,8..60,900;1,8..60,400&display=swap');

:root {
    /* Anthropic exact palette */
    --bg-page: #f5f0e8;
    --bg-card: #ece7dd;
    --bg-white: #faf7f2;
    --bg-dark: #191915;
    --bg-dark-nav: #191915;

    --text-primary: #191918;
    --text-body: #3d3d3a;
    --text-secondary: #6b6b66;
    --text-muted: #9b9a95;
    --text-light: #c5c3bc;
    --text-on-dark: #d4d2cc;
    --text-heading-dark: #e8e6e0;

    --accent: #c96442;
    --accent-hover: #b85a3a;
    --accent-bg: rgba(201, 100, 66, 0.08);
    --accent-border: rgba(201, 100, 66, 0.2);

    --border: #d8d4cb;
    --border-light: #e5e1d8;
    --border-dark: #3a3a36;
    --border-subtle: rgba(0,0,0,0.06);

    --follower-color: #c96442;
    --follower-bg: rgba(201, 100, 66, 0.07);
    --follower-border: rgba(201, 100, 66, 0.18);

    --leader-color: #3b7a9e;
    --leader-bg: rgba(59, 122, 158, 0.07);
    --leader-border: rgba(59, 122, 158, 0.18);

    --both-color: #6b6b66;
    --both-bg: rgba(107, 107, 102, 0.07);
    --both-border: rgba(107, 107, 102, 0.18);

    /* Typography */
    --font-serif: 'Source Serif 4', 'Georgia', 'Times New Roman', serif;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'SF Mono', monospace;

    /* Layout */
    --container: 1120px;
    --section-gap: 80px;
    --radius: 12px;
    --radius-sm: 8px;
    --transition: all 0.2s ease;
}

/* ========================================
   Reset
   ======================================== */

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 100px;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-page);
    color: var(--text-body);
    line-height: 1.65;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--text-primary);
    text-decoration: none;
    transition: var(--transition);
}

.container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 32px;
}

.bg-particles { display: none; }

/* ========================================
   Announcement Bar
   ======================================== */

.announcement-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1001;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 8px 24px;
    background: var(--bg-dark);
    font-size: 0.78rem;
    font-weight: 500;
    text-align: center;
}

.announcement-bar span {
    color: var(--text-on-dark);
    opacity: 0.7;
}

.announcement-bar a {
    color: var(--accent);
    font-weight: 600;
    transition: var(--transition);
}

.announcement-bar a:hover {
    color: #e07a56;
}

/* ========================================
   Navigation — Anthropic style
   Fixed top bar, dark CTA button
   ======================================== */

.navbar {
    position: fixed;
    top: 0;
    left: 0; right: 0;
    z-index: 1000;
    background: rgba(245, 240, 232, 0.88);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-subtle);
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(245, 240, 232, 0.95);
}

.nav-container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 60px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-primary);
    text-decoration: none;
}

.logo-icon { font-size: 1.15rem; }

.logo-text {
    font-family: var(--font-sans);
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: -0.01em;
}

.logo-accent { color: var(--accent); }

.nav-links {
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav-link {
    padding: 8px 16px;
    font-size: 0.87rem;
    font-weight: 450;
    color: var(--text-primary);
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--text-secondary);
}

.nav-service-link {
    display: inline-flex;
    align-items: center;
    padding: 7px 12px;
    margin-left: 4px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent);
    border: 1px solid rgba(222, 123, 85, 0.35);
    border-radius: 999px;
    background: rgba(222, 123, 85, 0.08);
    transition: var(--transition);
}

.nav-service-link:hover {
    color: #fff;
    border-color: transparent;
    background: var(--accent);
}

.nav-cta {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 20px;
    font-size: 0.85rem;
    font-weight: 500;
    color: #fff;
    background: var(--text-primary);
    border: none;
    border-radius: 100px;
    transition: var(--transition);
}

.nav-cta svg { fill: #fff; }

.nav-cta:hover {
    background: #333;
    color: #fff;
}

/* ========================================
   Hero — Anthropic editorial layout
   Large serif heading + body text on right
   ======================================== */

.hero {
    position: relative;
    z-index: 1;
    min-height: auto;
    display: flex;
    flex-direction: column;
    padding: 150px 32px 60px;
    max-width: var(--container);
    margin: 0 auto;
    gap: 0;
}

.hero-content { max-width: 680px; }

.hero-badge { display: none; }

.hero-title {
    font-family: var(--font-serif);
    font-size: clamp(2.8rem, 5.5vw, 4rem);
    font-weight: 400;
    line-height: 1.12;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    margin-bottom: 0;
}

/* Override gradient text - Anthropic uses plain black text */
.gradient-text,
.gradient-text-alt {
    background: none !important;
    -webkit-background-clip: unset !important;
    -webkit-text-fill-color: unset !important;
    background-clip: unset !important;
    color: var(--text-primary);
}

/* Underline key words like Anthropic does */
.gradient-text {
    text-decoration: underline;
    text-decoration-thickness: 1.5px;
    text-underline-offset: 4px;
}

.gradient-text-alt {
    color: var(--text-primary);
    text-decoration: underline;
    text-decoration-thickness: 1.5px;
    text-underline-offset: 4px;
}

.hero-subtitle {
    font-family: var(--font-serif);
    font-size: 1.18rem;
    line-height: 1.65;
    color: var(--text-body);
    margin-bottom: 32px;
    font-weight: 400;
}

.hero-subtitle strong {
    font-weight: 600;
    color: var(--text-primary);
}

.hero-actions {
    display: flex;
    gap: 12px;
    margin-bottom: 36px;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    font-size: 0.88rem;
    font-weight: 500;
    font-family: var(--font-sans);
    border-radius: 100px;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    text-decoration: none;
}

.btn-primary {
    background: var(--text-primary);
    color: #fff;
}

.btn-primary:hover {
    background: #333;
    color: #fff;
    transform: translateY(-1px);
}

.btn-primary svg { stroke: #fff; }

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    border-color: var(--text-secondary);
    color: var(--text-primary);
}

/* Hero visual — hidden, stats inline */
.hero-visual { display: none; }

.arm-diagram { display: none; }

.hero-stats {
    display: flex;
    flex-direction: row;
    gap: 40px;
    padding-top: 8px;
}

.stat {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 400;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    background: none;
    -webkit-background-clip: unset;
    -webkit-text-fill-color: unset;
    background-clip: unset;
}

.stat-label {
    font-size: 0.72rem;
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.stat-divider {
    width: 1px;
    height: 32px;
    background: var(--border);
    align-self: center;
}

/* ========================================
   Sections — generous whitespace
   ======================================== */

.section {
    position: relative;
    z-index: 1;
    padding: var(--section-gap) 0;
}

.section-header {
    text-align: left;
    margin-bottom: 60px;
    max-width: 640px;
}

.section-tag {
    display: inline-block;
    font-size: 0.68rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--text-muted);
    padding: 0;
    border: none;
    background: none;
    border-radius: 0;
    margin-bottom: 16px;
}

.section-title {
    font-family: var(--font-serif);
    font-size: clamp(1.8rem, 3.5vw, 2.6rem);
    font-weight: 400;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    line-height: 1.2;
    margin-bottom: 16px;
}

.section-desc {
    font-size: 1.02rem;
    color: var(--text-secondary);
    max-width: 520px;
    margin: 0;
    line-height: 1.7;
}

/* ========================================
   Features — Anthropic card grid
   Sand-colored cards, no borders
   ======================================== */

.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    background: none;
    border: none;
    border-radius: 0;
    overflow: visible;
}

.feature-card {
    padding: 36px;
    background: var(--bg-card);
    border: none;
    border-radius: var(--radius);
    transition: var(--transition);
}

.feature-card:hover {
    background: #e4dfd5;
}

.feature-icon {
    font-size: 1.5rem;
    margin-bottom: 18px;
}

.feature-card h3 {
    font-family: var(--font-serif);
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.feature-card p {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ========================================
   BOM Section — on dark background block
   like Anthropic's "Project Glasswing" card
   ======================================== */

.bom-section {
    background: var(--bg-dark);
    border-radius: var(--radius) var(--radius) 0 0;
    margin: 0 16px;
    padding: 64px 0 80px;
}

.bom-section .section-header {
    text-align: left;
}

.bom-section .section-tag {
    color: var(--text-light);
}

.bom-section .section-title {
    color: var(--text-heading-dark);
}

.bom-section .section-desc {
    color: var(--text-on-dark);
    opacity: 0.7;
}

/* BOM Tabs */
.bom-tabs {
    display: inline-flex;
    gap: 2px;
    margin-bottom: 48px;
    background: rgba(255,255,255,0.06);
    border-radius: 100px;
    padding: 3px;
}

.bom-tab {
    padding: 8px 20px;
    font-size: 0.82rem;
    font-weight: 500;
    font-family: var(--font-sans);
    color: var(--text-on-dark);
    opacity: 0.6;
    background: transparent;
    border: none;
    border-radius: 100px;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.bom-tab:hover {
    opacity: 1;
}

.bom-tab.active {
    color: var(--text-primary);
    background: var(--bg-page);
    opacity: 1;
    font-weight: 550;
}

/* BOM Category Headers */
.bom-category {
    margin-bottom: 48px;
}

.category-header {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-dark);
}

.category-icon {
    font-size: 1.3rem;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius-sm);
    flex-shrink: 0;
}

.category-header h3 {
    font-family: var(--font-serif);
    font-size: 1.15rem;
    font-weight: 500;
    color: var(--text-heading-dark);
    margin-bottom: 2px;
}

.category-header p {
    font-size: 0.78rem;
    color: var(--text-on-dark);
    opacity: 0.5;
}

.category-header a {
    color: var(--accent);
    font-weight: 500;
}

/* Parts Table — on dark */
.parts-table {
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius);
    overflow: hidden;
    background: rgba(255,255,255,0.03);
}

.table-header {
    display: grid;
    grid-template-columns: 2fr 1.5fr 1.2fr 0.5fr 0.8fr 1fr;
    gap: 12px;
    padding: 12px 20px;
    background: rgba(255,255,255,0.04);
    border-bottom: 1px solid rgba(255,255,255,0.06);
    font-size: 0.65rem;
    font-weight: 600;
    color: var(--text-on-dark);
    opacity: 0.4;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.table-row {
    display: grid;
    grid-template-columns: 2fr 1.5fr 1.2fr 0.5fr 0.8fr 1fr;
    gap: 12px;
    padding: 16px 20px;
    align-items: center;
    border-bottom: 1px solid rgba(255,255,255,0.05);
    transition: var(--transition);
}

.table-row:last-child { border-bottom: none; }

.table-row:hover {
    background: rgba(255,255,255,0.03);
}

.table-row.hidden { display: none; }

.part-name {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 550;
    font-size: 0.85rem;
    color: var(--text-heading-dark);
}

.part-badge {
    font-size: 0.58rem;
    font-weight: 650;
    padding: 2px 7px;
    border-radius: 3px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    flex-shrink: 0;
}

.part-badge.follower {
    background: var(--follower-bg);
    color: var(--follower-color);
    border: 1px solid var(--follower-border);
}

.part-badge.leader {
    background: var(--leader-bg);
    color: var(--leader-color);
    border: 1px solid var(--leader-border);
}

.part-badge.both {
    background: rgba(255,255,255,0.06);
    color: var(--text-on-dark);
    border: 1px solid rgba(255,255,255,0.1);
}

.part-spec {
    font-size: 0.78rem;
    color: var(--text-on-dark);
    opacity: 0.6;
    font-family: var(--font-mono);
    font-weight: 400;
}

.part-usage {
    font-size: 0.78rem;
    color: var(--text-on-dark);
    opacity: 0.4;
}

.part-qty {
    font-weight: 600;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-heading-dark);
}

.part-price {
    font-weight: 600;
    color: var(--text-heading-dark);
    font-family: var(--font-mono);
    font-size: 0.85rem;
}

.buy-link {
    display: inline-flex;
    align-items: center;
    padding: 5px 12px;
    font-size: 0.72rem;
    font-weight: 600;
    border-radius: 100px;
    transition: var(--transition);
    text-decoration: none;
    letter-spacing: 0.01em;
}

.buy-link.evelta {
    background: var(--follower-bg);
    color: var(--follower-color);
    border: 1px solid var(--follower-border);
}

.buy-link.evelta:hover {
    background: rgba(201, 100, 66, 0.16);
}

.buy-link.robu {
    background: var(--leader-bg);
    color: var(--leader-color);
    border: 1px solid var(--leader-border);
}

.buy-link.robu:hover {
    background: rgba(59, 122, 158, 0.16);
}

.buy-link.amazon {
    background: rgba(176, 125, 16, 0.07);
    color: #c4930f;
    border: 1px solid rgba(176, 125, 16, 0.18);
}

.buy-link.amazon:hover {
    background: rgba(176, 125, 16, 0.14);
}

.buy-link.github {
    background: rgba(255,255,255,0.06);
    color: var(--text-on-dark);
    border: 1px solid rgba(255,255,255,0.12);
}

.buy-link.github:hover {
    background: rgba(255,255,255,0.1);
}

/* Printed parts note */
.print-note {
    margin-top: 12px;
    font-size: 0.75rem;
    color: var(--text-on-dark);
    opacity: 0.45;
    font-style: italic;
    line-height: 1.5;
}

.print-note a {
    color: var(--accent);
    font-weight: 500;
    font-style: normal;
}

/* Subtotals — on dark */
.cost-subtotal {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 20px;
    margin-top: 10px;
    background: rgba(255,255,255,0.03);
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-on-dark);
    opacity: 0.7;
}

.subtotal-value {
    font-family: var(--font-mono);
    font-weight: 700;
    color: var(--text-heading-dark);
    font-size: 0.92rem;
    opacity: 1;
}

/* Total Card — on dark */
.cost-total { margin-top: 48px; }

.total-card {
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius);
    padding: 36px;
}

.total-header {
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid rgba(255,255,255,0.06);
}

.total-header h3 {
    font-family: var(--font-serif);
    font-size: 1.3rem;
    font-weight: 500;
    color: var(--text-heading-dark);
    margin-bottom: 4px;
}

.total-header p {
    font-size: 0.82rem;
    color: var(--text-on-dark);
    opacity: 0.5;
}

.total-breakdown { max-width: 400px; }

.breakdown-row {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    font-size: 0.9rem;
    color: var(--text-on-dark);
    opacity: 0.7;
}

.breakdown-row span:last-child {
    font-family: var(--font-mono);
    font-weight: 600;
    color: var(--text-heading-dark);
    opacity: 1;
}

.breakdown-divider {
    height: 1px;
    background: rgba(255,255,255,0.08);
    margin: 6px 0;
}

.breakdown-row.total {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-heading-dark);
    padding-top: 12px;
    opacity: 1;
}

.breakdown-row.total span:last-child {
    color: var(--text-heading-dark);
    font-size: 1.15rem;
    font-weight: 700;
    background: none;
    -webkit-background-clip: unset;
    -webkit-text-fill-color: unset;
    background-clip: unset;
}

.total-note {
    margin-top: 16px;
    font-size: 0.73rem;
    color: var(--text-on-dark);
    opacity: 0.4;
    font-style: italic;
}

/* ========================================
   Assembly Steps — line-separated list
   (Anthropic's "Core views on AI safety" style)
   ======================================== */

.assembly-section {
    background: var(--bg-page);
}

.steps-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0;
    background: none;
    border: none;
    border-top: 1px solid var(--border);
    overflow: visible;
    border-radius: 0;
}

.step-card {
    padding: 28px 0;
    background: transparent;
    border: none;
    border-bottom: 1px solid var(--border);
    border-radius: 0;
    display: grid;
    grid-template-columns: 60px 160px 1fr auto;
    align-items: center;
    gap: 24px;
    transition: var(--transition);
}

.step-card::before { display: none; }

.step-card:hover {
    background: transparent;
    transform: none;
    box-shadow: none;
}

.step-number {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-muted);
    background: none;
    -webkit-background-clip: unset;
    -webkit-text-fill-color: unset;
    background-clip: unset;
    opacity: 1;
    margin-bottom: 0;
    line-height: 1;
}

.step-card h3 {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0;
}

.step-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.55;
    margin-bottom: 0;
}

.step-link {
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--text-primary);
    padding: 8px 18px;
    background: var(--text-primary);
    color: #fff;
    border-radius: 100px;
    white-space: nowrap;
    transition: var(--transition);
}

.step-link:hover {
    background: #333;
    color: #fff;
}

/* ========================================
   Notes — subtle cards on light bg
   ======================================== */

.notes-section {
    background: var(--bg-page);
    padding-top: 48px;
    padding-bottom: 0;
}

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

.note-card {
    padding: 28px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    background: var(--bg-white);
    transition: var(--transition);
}

.note-card:hover { transform: none; }

.note-card.warning { border-color: var(--follower-border); }
.note-card.tip { border-color: var(--leader-border); }
.note-card.info { border-color: var(--border); }

.note-icon { font-size: 1.3rem; margin-bottom: 12px; }

.note-card h3 {
    font-family: var(--font-serif);
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.note-card p {
    font-size: 0.82rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.note-card strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* ========================================
   Footer — Anthropic dark footer exactly
   ======================================== */

.footer {
    position: relative;
    z-index: 1;
    padding: 72px 0 40px;
    background: var(--bg-dark);
    color: var(--text-on-dark);
    border-top: none;
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 64px;
    margin-bottom: 48px;
}

.footer-brand .logo-text {
    color: var(--text-heading-dark);
}

.footer-brand .logo-accent {
    color: var(--accent);
}

.footer-brand p {
    margin-top: 12px;
    font-size: 0.82rem;
    color: var(--text-on-dark);
    opacity: 0.5;
    max-width: 300px;
    line-height: 1.6;
}

.footer-brand .twitter-handle {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 16px;
    padding: 7px 16px;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-heading-dark);
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 100px;
    transition: var(--transition);
}

.footer-brand .twitter-handle:hover {
    background: rgba(255,255,255,0.1);
    color: #fff;
}

.footer-brand .twitter-handle svg {
    color: var(--text-heading-dark);
    fill: var(--text-heading-dark);
}

.footer-links h4 {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-heading-dark);
    margin-bottom: 16px;
    letter-spacing: 0;
    text-transform: none;
}

.footer-links a {
    display: block;
    padding: 5px 0;
    font-size: 0.82rem;
    color: var(--text-on-dark);
    opacity: 0.55;
    transition: var(--transition);
}

.footer-links a:hover {
    opacity: 1;
    color: var(--text-heading-dark);
    transform: none;
}

.footer-bottom {
    padding-top: 28px;
    border-top: 1px solid var(--border-dark);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-bottom p {
    font-size: 0.72rem;
    color: var(--text-on-dark);
    opacity: 0.35;
    margin: 0;
}

/* ========================================
   Scroll Animations
   ======================================== */

.fade-in {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

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

@media (max-width: 1024px) {
    .hero {
        grid-template-columns: 1fr;
        min-height: auto;
        padding-top: 120px;
        gap: 48px;
    }

    .hero-visual {
        order: -1;
    }

    .hero-stats {
        flex-direction: row;
        gap: 32px;
    }

    .stat {
        border-bottom: none;
        border-right: 1px solid var(--border);
        padding-right: 32px;
        padding-bottom: 0;
    }

    .stat:last-child { border-right: none; }

    .nav-links { display: none; }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 36px;
    }

    .step-card {
        grid-template-columns: 1fr;
        gap: 8px;
        padding: 24px 0;
    }

    .step-link {
        justify-self: start;
    }
}

@media (max-width: 768px) {
    :root { --section-gap: 80px; }

    .container { padding: 0 20px; }
    .nav-container { padding: 0 20px; }

    .bom-section { margin: 0; border-radius: 0; }

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

    .table-header { display: none; }

    .table-row {
        grid-template-columns: 1fr;
        gap: 4px;
        padding: 14px 16px;
    }

    .part-spec::before { content: 'Spec: '; color: var(--text-muted); font-family: var(--font-sans); }
    .part-usage::before { content: 'Used in: '; color: var(--text-muted); }
    .part-qty::before { content: 'Qty: '; color: var(--text-muted); font-family: var(--font-sans); font-weight: 400; }
    .part-price::before { content: 'Price: '; color: var(--text-muted); font-family: var(--font-sans); font-weight: 400; }

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

    .cost-subtotal { flex-direction: column; gap: 6px; text-align: center; }

    .footer-bottom { flex-direction: column; gap: 4px; text-align: center; }
}

@media (max-width: 480px) {
    .hero-title { font-size: 2.2rem; }

    .hero-actions { flex-direction: column; }

    .btn { width: 100%; justify-content: center; }

    .hero-stats { flex-direction: column; gap: 16px; }

    .stat { border-right: none; border-bottom: 1px solid var(--border); padding-right: 0; padding-bottom: 16px; }
}

/* ========================================
   Order Page
   ======================================== */

.order-navbar {
    top: 0;
    background: rgba(250, 247, 242, 0.78);
    border-bottom: 1px solid rgba(201, 100, 66, 0.16);
}

.order-page {
    position: relative;
    z-index: 1;
    min-height: 100vh;
    padding-top: 90px;
    padding-bottom: 48px;
    background:
        radial-gradient(circle at 10% 12%, rgba(201, 100, 66, 0.2), transparent 34%),
        radial-gradient(circle at 92% 28%, rgba(59, 122, 158, 0.17), transparent 30%),
        linear-gradient(180deg, #f8f2e8 0%, #f2ece1 100%);
}

.order-glow {
    position: fixed;
    width: 320px;
    height: 320px;
    border-radius: 50%;
    filter: blur(90px);
    pointer-events: none;
    z-index: 0;
    opacity: 0.5;
}

.order-glow-1 {
    top: -80px;
    left: -100px;
    background: rgba(201, 100, 66, 0.4);
}

.order-glow-2 {
    right: -80px;
    top: 160px;
    background: rgba(59, 122, 158, 0.3);
}

.order-nav-pill {
    display: inline-flex;
    align-items: center;
    padding: 8px 14px;
    border-radius: 999px;
    font-size: 0.77rem;
    font-weight: 700;
    letter-spacing: 0.03em;
    color: #8f3f24;
    border: 1px solid rgba(201, 100, 66, 0.28);
    background: rgba(201, 100, 66, 0.1);
}

.order-hero {
    padding: 28px 0 16px;
}

.order-hero .container {
    max-width: 980px;
}

.order-hero-topline {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 14px;
}

.order-chip {
    display: inline-flex;
    align-items: center;
    padding: 5px 12px;
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: #fff;
    background: #c96442;
    border-radius: 999px;
}

.order-layout {
    display: grid;
    grid-template-columns: 1.4fr 1fr;
    gap: 20px;
    align-items: start;
}

.order-form,
.order-summary {
    background: rgba(250, 247, 242, 0.94);
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: 16px;
    padding: 26px;
    box-shadow: 0 18px 34px rgba(25, 25, 21, 0.08);
    backdrop-filter: blur(6px);
}

.order-form h2,
.order-summary h2 {
    font-family: var(--font-serif);
    font-size: 1.4rem;
    font-weight: 500;
    margin-bottom: 18px;
    color: var(--text-primary);
}

.order-subtitle {
    font-size: 0.82rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
}

.form-row {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 14px;
}

.form-row label {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.form-row input,
.form-row select,
.form-row textarea {
    border: 1px solid rgba(0, 0, 0, 0.12);
    border-radius: 8px;
    padding: 10px 12px;
    font-family: var(--font-sans);
    font-size: 0.9rem;
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.86);
}

.form-row input:focus,
.form-row select:focus,
.form-row textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(201, 100, 66, 0.12);
}

.payment-panel {
    border: 1px solid rgba(201, 100, 66, 0.28);
    background:
        linear-gradient(140deg, rgba(201, 100, 66, 0.12) 0%, rgba(201, 100, 66, 0.04) 80%),
        rgba(250, 247, 242, 0.9);
    border-radius: 12px;
    padding: 18px;
    margin-bottom: 16px;
}

.payment-panel h3 {
    font-size: 1rem;
    margin-bottom: 6px;
    color: var(--text-primary);
}

.payment-panel p {
    font-size: 0.82rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.payment-help {
    margin-top: 10px;
}

.payment-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 10px;
}

.payment-actions .btn {
    padding: 10px 18px;
}

.payment-actions .btn-secondary {
    background: rgba(255, 255, 255, 0.9);
}

.full-width {
    width: 100%;
    justify-content: center;
}

.summary-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.summary-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.summary-row span:last-child {
    font-family: var(--font-mono);
    color: var(--text-primary);
}

.summary-divider {
    border-bottom: 1px solid var(--border);
    margin: 4px 0;
}

.summary-row.total {
    font-weight: 600;
    color: var(--text-primary);
}

.summary-row.total span:last-child {
    font-size: 1.1rem;
    font-weight: 700;
    color: #8f3f24;
}

.summary-points {
    margin-top: 16px;
    padding-left: 18px;
    color: var(--text-secondary);
}

.summary-points li {
    margin-bottom: 6px;
    font-size: 0.83rem;
}

.order-message {
    margin-top: 14px;
    font-size: 0.88rem;
    color: #1f7a3c;
    font-weight: 500;
}

.order-message.error {
    color: #ad2f2f;
}

.pricing-table {
    display: flex;
    flex-direction: column;
    gap: 0;
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: 8px;
    overflow: hidden;
    background: rgba(255, 255, 255, 0.6);
}

.pricing-header {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    padding: 12px;
    background: rgba(201, 100, 66, 0.12);
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
    font-weight: 600;
    font-size: 0.75rem;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.pricing-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    padding: 11px 12px;
    align-items: center;
    font-size: 0.83rem;
    color: var(--text-secondary);
    border-bottom: 1px solid rgba(0, 0, 0, 0.04);
}

.pricing-row:last-child {
    border-bottom: none;
}

.pricing-row span:nth-child(n+2) {
    font-family: var(--font-mono);
    font-weight: 600;
    color: var(--text-primary);
}

@media (max-width: 900px) {
    .order-nav-pill {
        display: none;
    }

    .order-layout {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .order-hero-topline {
        flex-direction: column;
        align-items: flex-start;
    }

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

    .payment-actions {
        flex-direction: column;
    }
}