/* ========== RESET & TOKENS ========== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    --bg: #FFFFFF;
    --bg-s: #F7F7F7;
    --card: #FFFFFF;
    --card-hover: #FAFAFA;
    --text: #111111;
    --text-s: #555555;
    --text-m: #999999;
    --gold: #111111;
    --gold-l: #333333;
    --gold-dim: #666666;
    --gold-glow: rgba(0,0,0,0.04);
    --gold-glow-s: rgba(0,0,0,0.12);
    --border: rgba(0,0,0,0.16);
    --border-l: rgba(0,0,0,0.24);
    --r: 14px;
    --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

html { font-size: 16px; scroll-behavior: smooth; overflow-x: clip; width: 100%; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    overflow-x: clip;
    width: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a { color: inherit; text-decoration: none; }

.container {
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 28px;
}

/* ========== DYNAMIC BACKGROUND ========== */
.bg-dynamic {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    overflow: hidden;
}

/* Dot grid — visible across the page */
.bg-dot-grid {
    position: absolute;
    inset: 0;
    background-image: radial-gradient(circle, rgba(0,0,0,0.12) 1.2px, transparent 1.2px);
    background-size: 32px 32px;
    opacity: 1;
}

/* Ambient gradient sweep — slow horizontal drift, no center rotation */
.bg-aurora {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        135deg,
        transparent 0%,
        rgba(0,0,0,0.015) 25%,
        transparent 45%,
        rgba(0,0,0,0.012) 65%,
        transparent 85%,
        rgba(0,0,0,0.018) 100%
    );
    background-size: 300% 300%;
    animation: auroraDrift 25s ease-in-out infinite alternate;
}

@keyframes auroraDrift {
    0%   { background-position: 0% 0%; }
    50%  { background-position: 100% 50%; }
    100% { background-position: 30% 100%; }
}

/* Animated gradient blobs — much more visible */
.bg-blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0;
    will-change: transform;
}
.bg-blob--1 {
    width: 700px;
    height: 700px;
    background: radial-gradient(circle, rgba(0,0,0,0.025), transparent 65%);
    top: 5%;
    left: -10%;
    animation: blobDrift1 18s ease-in-out infinite alternate;
}
.bg-blob--2 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(0,0,0,0.018), transparent 65%);
    top: 40%;
    right: -12%;
    animation: blobDrift2 15s ease-in-out infinite alternate;
}
.bg-blob--3 {
    width: 550px;
    height: 550px;
    background: radial-gradient(circle, rgba(0,0,0,0.014), transparent 65%);
    bottom: 0%;
    left: 15%;
    animation: blobDrift3 22s ease-in-out infinite alternate;
}

/* Each blob gets its own drift path for organic motion */
@keyframes blobDrift1 {
    0%   { transform: translate(0, 0) scale(1); }
    33%  { transform: translate(80px, -60px) scale(1.1); }
    66%  { transform: translate(-40px, 40px) scale(0.9); }
    100% { transform: translate(60px, -30px) scale(1.05); }
}
@keyframes blobDrift2 {
    0%   { transform: translate(0, 0) scale(1); }
    33%  { transform: translate(-70px, 50px) scale(1.08); }
    66%  { transform: translate(50px, -40px) scale(0.92); }
    100% { transform: translate(-30px, 70px) scale(1.04); }
}
@keyframes blobDrift3 {
    0%   { transform: translate(0, 0) scale(1); }
    33%  { transform: translate(50px, 60px) scale(1.06); }
    66%  { transform: translate(-60px, -30px) scale(0.95); }
    100% { transform: translate(40px, -50px) scale(1.1); }
}

/* ========== FLOATING ICON ILLUSTRATIONS ========== */
.bg-icons {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.bg-icon {
    position: absolute;
    opacity: 0;
    transition: opacity 2s ease;
}
.bg-icon.visible { opacity: 0.28; }
.bg-icon.visible.bright { opacity: 0.35; }

.bg-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    pointer-events: none;
    user-select: none;
    mix-blend-mode: multiply;
    filter: grayscale(1) brightness(0);
}

/* 3 float variations for organic movement */
.bg-icon--f1 { animation: iconF1 9s ease-in-out infinite; }
.bg-icon--f2 { animation: iconF2 11s ease-in-out infinite; }
.bg-icon--f3 { animation: iconF3 8s ease-in-out infinite; }

@keyframes iconF1 {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-14px) rotate(3deg); }
}
@keyframes iconF2 {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-10px) rotate(-2.5deg); }
}
@keyframes iconF3 {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-18px) rotate(2deg); }
}

/* Hide when viewport is too narrow for margin illustrations */
@media (max-width: 1440px) {
    .bg-icons { opacity: 0.5; }
}
@media (max-width: 1200px) {
    .bg-icons { display: none; }
}

/* ========== PAGE WRAPPER (transition) ========== */
.page { opacity: 0; transition: opacity 0.6s ease, transform 0.6s ease; position: relative; z-index: 1; overflow-x: clip; max-width: 100vw; background: transparent; }
.page.loaded { opacity: 1; }
.page.exit { opacity: 0; transform: translateY(-8px); }

/* ========== SCROLL PROGRESS BAR ========== */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 2px;
    background: var(--gold);
    z-index: 101;
    width: 0%;
    pointer-events: none;
    box-shadow: 0 0 8px rgba(0,0,0,0.15), 0 0 2px rgba(0,0,0,0.3);
}


/* ========== NAV ========== */
nav {
    position: fixed;
    top: 0;
    left: 0; right: 0;
    z-index: 100;
    padding: 18px 0;
    transition: background 0.4s, border 0.4s, backdrop-filter 0.4s;
    opacity: 0;
    animation: navIn 0.8s var(--ease) 0.3s forwards;
}
@keyframes navIn { to { opacity: 1; } }
nav.scrolled {
    background: rgba(255,255,255,0.85);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-bottom: 2px solid var(--border);
}
nav .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Logo */
.logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    transition: filter 0.3s ease;
}
.logo:hover {
    filter: drop-shadow(0 0 8px rgba(0,0,0,0.15));
}
.logo-img {
    height: 44px;
    width: auto;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 36px;
    list-style: none;
}
.nav-links a {
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--text-m);
    transition: color 0.3s;
    letter-spacing: 0.01em;
    cursor: pointer;
}
.nav-links a:hover { color: var(--text); }
.nav-links .btn { color: var(--bg); }
.nav-links .btn:hover { color: var(--bg); }

/* ========== BUTTONS ========== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 11px 26px;
    background: var(--gold);
    color: var(--bg);
    border-radius: 8px;
    font-size: 0.82rem;
    font-weight: 600;
    letter-spacing: 0.01em;
    border: none;
    cursor: pointer;
    transition: box-shadow 0.3s, transform 0.15s ease;
    will-change: transform;
    position: relative;
    overflow: hidden;
    isolation: isolate;
}
.btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gold-l);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s var(--ease);
    z-index: -2;
}
.btn:hover::before {
    transform: scaleX(1);
}
.btn::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 50%;
    height: 100%;
    background: linear-gradient(105deg, transparent 30%, rgba(255,255,255,0.22) 50%, transparent 70%);
    z-index: -1;
    pointer-events: none;
}
.btn:hover::after {
    animation: btnShine 0.4s 0.08s ease-out forwards;
}
@keyframes btnShine {
    to { left: 150%; }
}
.btn:hover {
    box-shadow: 0 0 30px var(--gold-glow-s);
}
.btn-lg {
    padding: 16px 40px;
    font-size: 0.92rem;
    border-radius: 10px;
}

/* Hamburger */
.ham { display: none; cursor: pointer; padding: 8px; z-index: 1001; }
.ham span {
    display: block;
    width: 22px;
    height: 1.5px;
    background: var(--text);
    margin: 5px 0;
    transition: 0.3s;
}
.ham.open span:nth-child(1) { transform: rotate(45deg) translate(4px, 4px); }
.ham.open span:nth-child(2) { opacity: 0; }
.ham.open span:nth-child(3) { transform: rotate(-45deg) translate(4px, -4px); }

/* Mobile nav overlay */
@media (max-width: 768px) {
    .nav-links.mobile-open {
        display: flex;
        flex-direction: column;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--bg);
        z-index: 1000;
        align-items: center;
        justify-content: center;
        gap: 24px;
    }
    .nav-links.mobile-open li { list-style: none; }
    .nav-links.mobile-open a { font-size: 1.4rem; }
    .nav-links.mobile-open .btn { margin-top: 16px; }
}

/* ========== HERO ========== */
.hero {
    min-height: 85vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 120px 28px 60px;
    position: relative;
    overflow: hidden;
}

/* Ambient orb */
.orb {
    position: absolute;
    width: 700px;
    height: 700px;
    background: radial-gradient(circle, rgba(0,0,0,0.02) 0%, transparent 65%);
    top: 35%;
    left: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none;
    will-change: transform;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 680px;
}

.hero h1 {
    font-size: clamp(2.4rem, 5.2vw, 3.8rem);
    font-weight: 700;
    letter-spacing: -0.035em;
    line-height: 1.15;
    margin-bottom: 0;
    opacity: 0;
    transform: translateY(30px);
    will-change: opacity, transform;
}

/* Hero word-by-word reveal */
.hero-word {
    display: inline-block;
    opacity: 0;
    will-change: opacity, transform, filter;
}

/* Section title word reveals */
.title-word {
    display: inline-block;
    opacity: 0;
    will-change: opacity, transform, filter;
}

/* Separator line */
.gold-rule {
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--gold), transparent);
    margin: 28px auto 28px;
    will-change: width;
    position: relative;
    overflow: hidden;
}
.gold-rule::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 60%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(0,0,0,0.3), transparent);
    opacity: 0;
    transition: opacity 0.3s;
}
.gold-rule.shimmer::after {
    opacity: 1;
    animation: ruleShimmer 0.8s ease-out forwards;
}
@keyframes ruleShimmer {
    from { left: -60%; }
    to { left: 160%; }
}

.hero-sub {
    font-size: 1rem;
    color: var(--text-s);
    max-width: 520px;
    margin: 0 auto;
    line-height: 1.75;
    opacity: 0;
    transform: translateY(18px);
    will-change: opacity, transform;
}

.hero-cta {
    opacity: 0;
    transform: translateY(18px);
    will-change: opacity, transform;
}

.cross-link {
    margin-top: 24px;
    font-size: 0.85rem;
    color: var(--text-m);
    opacity: 0;
    transform: translateY(12px);
    will-change: opacity, transform;
}
.cross-link a {
    color: var(--gold-dim);
    border-bottom: 1px solid rgba(0,0,0,0.15);
    transition: color 0.3s, border-color 0.3s;
}
.cross-link a:hover {
    color: var(--gold);
    border-color: var(--gold);
}

/* ========== SECTION SYSTEM ========== */
.section {
    padding: 90px 0;
    position: relative;
}

/* Smooth gradient transitions between sections */
.section--alt {
    background: linear-gradient(180deg,
        var(--bg) 0%, var(--bg-s) 15%, var(--bg-s) 85%, var(--bg) 100%);
}

/* Dark sections — black bg, white text, alternating contrast */
.section--dark {
    background: #111111;
    color: #FFFFFF;
}
.section--dark .section-label,
.section--dark .section-title,
.section--dark h1,
.section--dark h2,
.section--dark h3,
.section--dark .math-big,
.section--dark .transition-big,
.section--dark .transition-gold,
.section--dark .agitation-text p.gold-text { color: #FFFFFF; }
.section--dark .section-sub,
.section--dark > .container > p,
.section--dark .final-cta p,
.section--dark p,
.section--dark .hero-sub,
.section--dark .problem-intro p,
.section--dark .framework-intro p,
.section--dark .process-intro p { color: rgba(255,255,255,0.7); }

/* Cards inside dark sections stay white */
.section--dark .card,
.section--dark .fw-card,
.section--dark .step-card,
.section--dark .qual-col {
    background: #FFFFFF;
    color: #111111;
    border-color: rgba(0,0,0,0.08);
}
.section--dark .card h3,
.section--dark .fw-card h3,
.section--dark .step-card h3,
.section--dark .qual-col h3 { color: #111111; }
.section--dark .card p,
.section--dark .fw-card p,
.section--dark .step-card p,
.section--dark .qual-col p { color: #555555; }
.section--dark .card-num,
.section--dark .fw-num,
.section--dark .step-num { color: #999999; }
.section--dark .card-icon svg,
.section--dark .fw-icon svg,
.section--dark .step-icon svg { stroke: #111111; }

/* Inverted buttons inside dark sections — white bg, black text */
.section--dark .btn {
    background: #FFFFFF;
    color: #111111;
}
.section--dark .btn::before { background: #E0E0E0; }
.section--dark .btn:hover { box-shadow: 0 0 30px rgba(255,255,255,0.15); }
.section--dark .card-arrow {
    background: #111111;
    color: #FFFFFF;
}
.section--dark .card-arrow svg { stroke: #FFFFFF; }

/* Dark transition sections */
.transition-section.section--dark { background: #111111; }
.transition-section.section--dark .transition-big { color: #FFFFFF; }
.transition-section.section--dark .transition-gold { color: #FFFFFF; }
.transition-section.section--dark .transition-line {
    background: linear-gradient(90deg, transparent, #FFFFFF, transparent);
}

/* Dark video container */
.section--dark .video-container {
    background: #FFFFFF;
    border-color: rgba(0,0,0,0.08);
}

/* Dark section gold rule */
.section--dark .gold-rule {
    background: linear-gradient(90deg, transparent, #FFFFFF, transparent);
}

/* FAQ in dark sections */
.section--dark .faq-item { border-bottom-color: rgba(255,255,255,0.15); }
.section--dark .faq-q { color: #FFFFFF; }
.section--dark .faq-q:hover { color: rgba(255,255,255,0.8); }
.section--dark .faq-icon { color: rgba(255,255,255,0.5); }
.section--dark .faq-item.open .faq-icon { color: #FFFFFF; }
.section--dark .faq-a-inner { color: rgba(255,255,255,0.7); }

/* Qual columns in dark sections */
.section--dark .qual-yes h3 { color: #111111; }
.section--dark .qual-no h3 { color: #777777; }
.section--dark .qual-yes .qual-list li svg { stroke: #111111; }
.section--dark .qual-no .qual-list li svg { stroke: #999999; }
.section--dark .qual-list li { color: #555555; }

/* Catch-all: any remaining text in dark sections */
.section--dark .cross-link { color: rgba(255,255,255,0.5); }
.section--dark .cross-link a { color: rgba(255,255,255,0.7); border-bottom-color: rgba(255,255,255,0.3); }
.section--dark .cross-link a:hover { color: #FFFFFF; border-color: #FFFFFF; }
.section--dark .video-text { color: rgba(255,255,255,0.7); }
.section--dark .play-btn { border-color: #FFFFFF; }
.section--dark .play-btn svg { fill: #FFFFFF; }
.section--dark .agitation-text p { color: rgba(255,255,255,0.7); }
.section--dark .blur-word { color: rgba(255,255,255,0.7); }

.section-label {
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--gold);
    margin-bottom: 20px;
}

.section-title {
    font-size: clamp(1.6rem, 2.8vw, 2.2rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.15;
    margin-bottom: 16px;
}

.section-sub {
    font-size: 1rem;
    color: var(--text-s);
    line-height: 1.75;
    max-width: 560px;
}

.section-center {
    text-align: center;
}
.section-center .section-sub {
    margin: 0 auto;
}

/* ========== CARD SYSTEM ========== */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
}

/* Layout variant: split removed — equal columns is cleaner */

.card {
    position: relative;
    background: var(--card);
    border: 2px solid var(--border);
    border-radius: var(--r);
    padding: 32px 28px;
    overflow: hidden;
    opacity: 0;
    transform: translateY(30px);
    will-change: opacity, transform;
    cursor: pointer;
}

/* Cursor-tracking inner glow */
.card-glow {
    position: absolute;
    inset: 0;
    background: radial-gradient(
        800px circle at var(--mouse-x, 50%) var(--mouse-y, 50%),
        rgba(0,0,0,0.04),
        transparent 40%
    );
    opacity: 0;
    transition: opacity 0.5s ease;
    pointer-events: none;
    border-radius: inherit;
}
.card:hover .card-glow { opacity: 1; }

/* Cursor-tracking border spotlight */
.card-border-glow {
    position: absolute;
    inset: -1px;
    background: radial-gradient(
        400px circle at var(--mouse-x, 50%) var(--mouse-y, 50%),
        rgba(0,0,0,0.18),
        transparent 40%
    );
    opacity: 0;
    transition: opacity 0.5s ease;
    pointer-events: none;
    border-radius: inherit;
    z-index: -1;
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    padding: 1px;
}
.card:hover .card-border-glow { opacity: 1; }

.card:hover {
    border-color: rgba(0,0,0,0.12);
}

/* Accent line top */
.card::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--gold), transparent);
    opacity: 0;
    transition: opacity 0.5s;
}
.card:hover::after { opacity: 0.5; }

/* Icons — inline with number */
.card-icon {
    width: 36px;
    height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    float: left;
    margin-right: 12px;
    margin-bottom: 0;
}
.card-icon svg {
    width: 22px;
    height: 22px;
    stroke: var(--gold);
    fill: none;
    stroke-width: 1.5;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.card-num {
    font-size: 0.68rem;
    font-weight: 600;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--gold);
    line-height: 36px;
    margin-bottom: 14px;
}
.card h3 {
    clear: both;
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.3;
    margin-bottom: 14px;
}
.card p {
    color: var(--text-s);
    font-size: 0.9rem;
    line-height: 1.75;
}

/* Card CTA (index page cards) — styled as button */
.card-arrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 22px;
    background: var(--gold);
    color: var(--bg);
    border-radius: 8px;
    font-size: 0.82rem;
    font-weight: 600;
    transition: box-shadow 0.3s, gap 0.4s var(--ease);
}
.card:hover .card-arrow {
    gap: 12px;
    box-shadow: 0 0 24px var(--gold-glow-s);
}
.card-arrow svg {
    width: 15px;
    height: 15px;
    stroke: var(--bg);
}

/* ========== VIDEO SECTION ========== */
.video-wrap {
    max-width: 860px;
    margin: 0 auto;
}
.video-container {
    position: relative;
    background: var(--card);
    border: 2px solid var(--border);
    border-radius: var(--r);
    overflow: hidden;
    transition: border-color 0.4s, box-shadow 0.4s;
}
.video-container wistia-player {
    display: block;
    width: 100%;
}
.video-container:hover {
    border-color: rgba(0,0,0,0.12);
    box-shadow: 0 20px 60px rgba(0,0,0,0.08);
}
.video-inner { text-align: center; }
.play-btn {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    border: 2px solid var(--gold);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 18px;
    transition: background 0.3s, box-shadow 0.3s;
}
.play-btn svg {
    width: 24px;
    height: 24px;
    fill: var(--gold);
    margin-left: 3px;
}
.video-container:hover .play-btn {
    background: rgba(0,0,0,0.06);
    box-shadow: 0 0 40px rgba(0,0,0,0.08);
}
.video-text {
    font-size: 0.85rem;
    color: var(--text-s);
    font-weight: 500;
}

/* ========== AGITATION SPLIT (text + video side by side) ========== */
.agitation-split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}
.agitation-split .video-wrap {
    max-width: 100%;
    margin: 0;
    position: sticky;
    top: 120px;
}

/* ========== PROBLEM AGITATION ========== */
.agitation-text {
    max-width: 620px;
}
.agitation-text p {
    font-size: 1.05rem;
    color: var(--text-s);
    line-height: 1.85;
    margin-bottom: 12px;
}

/* Blur-to-clear word animation */
.blur-word {
    display: inline-block;
    filter: blur(4px);
    opacity: 0.3;
    transition: filter 0.3s ease, opacity 0.3s ease;
}
.blur-word.clear {
    filter: blur(0px);
    opacity: 1;
}

.agitation-text p.gold-text {
    color: var(--gold);
    font-weight: 600;
}

/* Gold text character reveal */
.gold-text .char {
    display: inline-block;
    opacity: 0;
    transform: scale(1.05);
    transition: opacity 0.3s ease, transform 0.3s ease;
}
.gold-text .char.revealed {
    opacity: 1;
    transform: scale(1);
}

/* ========== TRANSITION SECTIONS ========== */
.transition-section {
    text-align: center;
    padding: 70px 0;
    overflow: hidden;
}
.transition-big {
    font-size: clamp(2rem, 4vw, 3.2rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.2;
    margin-bottom: 10px;
    will-change: transform;
}
.transition-gold {
    font-size: clamp(2rem, 4vw, 3.2rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.2;
    color: var(--gold);
    will-change: transform;
}

/* Transition line */
.transition-line {
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--gold), transparent);
    margin: 28px auto 0;
}

/* ========== PROBLEM INTRO ========== */
.problem-intro {
    max-width: 620px;
    margin-bottom: 20px;
}
.problem-intro p {
    font-size: 1rem;
    color: var(--text-s);
    line-height: 1.75;
    margin-bottom: 28px;
}

/* ========== FRAMEWORK (3 columns) ========== */
.framework-intro {
    max-width: 620px;
    margin: 0 auto 20px;
}
.framework-intro .section-sub {
    margin-bottom: 8px;
}

.framework-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 48px;
    margin-bottom: 48px;
    position: relative;
}

.fw-card {
    padding: 32px 28px;
    background: var(--card);
    border: 2px solid var(--border);
    border-radius: var(--r);
    position: relative;
    overflow: hidden;
    transition: border-color 0.4s, box-shadow 0.4s;
    cursor: pointer;
    text-align: center;
}
.fw-card:hover {
    border-color: rgba(0,0,0,0.12);
    box-shadow: 0 16px 48px rgba(0,0,0,0.06);
}
.fw-card::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--gold), transparent);
    opacity: 0;
    transition: opacity 0.5s;
}
.fw-card:hover::after { opacity: 0.5; }

/* Framework icons — inline with number */
.fw-icon {
    width: 36px;
    height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin: 0 8px 0 0;
    vertical-align: middle;
}
.fw-icon svg {
    width: 22px;
    height: 22px;
    stroke: var(--gold);
    fill: none;
    stroke-width: 1.5;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.fw-num {
    font-size: 0.68rem;
    font-weight: 600;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--gold);
    display: inline-flex;
    align-items: center;
    height: 36px;
    margin-bottom: 14px;
    vertical-align: middle;
}
.fw-card h3 {
    font-size: 1.15rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    margin-bottom: 12px;
}
.fw-card p {
    font-size: 0.88rem;
    color: var(--text-s);
    line-height: 1.75;
}

/* ========== PROCESS STEPS (2x2 grid) ========== */
.process-intro {
    max-width: 620px;
    margin-bottom: 20px;
}

.step-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
    margin-top: 48px;
    margin-bottom: 48px;
}

/* Layout variant: Staggered steps — removed, original 2x2 grid is cleaner */

.step-card {
    position: relative;
    background: var(--card);
    border: 2px solid var(--border);
    border-radius: var(--r);
    padding: 32px 28px;
    overflow: hidden;
    opacity: 0;
    transform: translateY(20px);
    will-change: opacity, transform;
    transition: border-color 0.4s, box-shadow 0.4s;
    cursor: pointer;
}
.step-card:hover {
    border-color: rgba(0,0,0,0.12);
    box-shadow: 0 16px 48px rgba(0,0,0,0.06);
}
.step-card::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--gold), transparent);
    opacity: 0;
    transition: opacity 0.5s;
}
.step-card:hover::after { opacity: 0.5; }

/* Step icons — inline with number */
.step-icon {
    width: 36px;
    height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    float: left;
    margin-right: 12px;
    margin-bottom: 0;
}
.step-icon svg {
    width: 22px;
    height: 22px;
    stroke: var(--gold);
    fill: none;
    stroke-width: 1.5;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.step-num {
    font-size: 0.68rem;
    font-weight: 600;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--gold);
    line-height: 36px;
    margin-bottom: 14px;
}
.step-card h3 {
    clear: both;
    font-size: 1.15rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    margin-bottom: 12px;
}
.step-card p {
    font-size: 0.9rem;
    color: var(--text-s);
    line-height: 1.75;
}

/* ========== MATH QUOTE ========== */
.math-quote {
    text-align: center;
    max-width: 680px;
    margin: 0 auto;
}
.math-big {
    font-size: clamp(1.8rem, 3.5vw, 2.8rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: 36px;
}

/* ========== QUALIFICATION ========== */
.qual-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    margin-top: 48px;
}
.qual-col {
    background: var(--card);
    border: 2px solid var(--border);
    border-radius: var(--r);
    padding: 44px 38px;
}
.qual-col h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 24px;
    letter-spacing: -0.01em;
}
.qual-yes h3 { color: var(--gold); }
.qual-no h3 { color: var(--text-s); }

.qual-list { list-style: none; }
.qual-list li {
    font-size: 0.92rem;
    color: var(--text-s);
    line-height: 1.7;
    padding: 8px 0;
    padding-left: 32px;
    position: relative;
}
.qual-list li svg {
    position: absolute;
    left: 0;
    top: 12px;
    width: 18px;
    height: 18px;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
    fill: none;
}
.qual-yes .qual-list li svg { stroke: var(--gold); }
.qual-no .qual-list li svg { stroke: var(--text-m); }

/* ========== FAQ ========== */
.faq-list {
    max-width: 760px;
    margin: 48px auto 0;
}
.faq-item {
    border-bottom: 2px solid var(--border);
}
.faq-q {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 24px 0;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    letter-spacing: -0.01em;
    transition: color 0.3s;
    user-select: none;
}
.faq-q:hover { color: var(--gold); }
.faq-icon {
    font-size: 1.3rem;
    font-weight: 300;
    color: var(--text-m);
    transition: transform 0.4s var(--ease), color 0.3s;
    flex-shrink: 0;
    margin-left: 16px;
    line-height: 1;
}
.faq-item.open .faq-icon {
    transform: rotate(45deg);
    color: var(--gold);
}
.faq-a {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s var(--ease);
}
.faq-item.open .faq-a { max-height: 500px; }
.faq-a-inner {
    padding-bottom: 24px;
    font-size: 0.9rem;
    color: var(--text-s);
    line-height: 1.8;
}

/* ========== FINAL CTA ========== */
.final-cta {
    text-align: center;
    padding: 100px 0;
}
.final-cta .section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: 18px;
}
.final-cta p {
    font-size: 1.05rem;
    color: var(--text-s);
    max-width: 520px;
    margin: 0 auto 40px;
    line-height: 1.75;
}

/* ========== FOOTER ========== */
footer {
    padding: 44px 0;
    background: #111111;
    border-top: 2px solid rgba(255,255,255,0.1);
}
footer .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.foot-links {
    display: flex;
    gap: 28px;
    list-style: none;
}
.foot-links a {
    font-size: 0.78rem;
    color: var(--text-m);
    transition: color 0.3s;
    cursor: pointer;
    position: relative;
}
.foot-links a { color: rgba(255,255,255,0.5); }
.foot-links a:hover { color: #FFFFFF; }
.foot-links a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 1px;
    background: #FFFFFF;
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s var(--ease);
}
.foot-links a:hover::after { transform: scaleX(1); }
.foot-links a:hover { color: #FFFFFF; }
.foot-copy {
    font-size: 0.72rem;
    color: rgba(255,255,255,0.4);
}

/* ========== FLOATING PARALLAX SHAPES ========== */
.floating-shape {
    position: absolute;
    pointer-events: none;
    z-index: 0;
    opacity: 0;
}
.shape-circle {
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(0,0,0,0.02), transparent 70%);
    right: -8%;
    top: 20%;
}
.shape-diamond {
    width: 50px;
    height: 50px;
    background: rgba(0,0,0,0.02);
    transform: rotate(45deg);
    left: 4%;
    top: 30%;
}

/* ========== SCROLL REVEAL (fallback before GSAP loads) ========== */
.sr {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
.sr.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ========== MOBILE ========== */
@media (max-width: 768px) {
    .nav-links { display: none; }
    .ham { display: block; }
    .hero h1 { font-size: 2.1rem; }
    .hero { min-height: 75vh; padding: 100px 28px 40px; }
    .agitation-split { grid-template-columns: 1fr; gap: 40px; }
    .agitation-split .video-wrap { position: static; }
    .cards-grid { grid-template-columns: 1fr; }
    .framework-grid { grid-template-columns: 1fr; }
    .step-grid { grid-template-columns: 1fr; }
    .qual-grid { grid-template-columns: 1fr; }
    .card { padding: 36px 28px; }
    .fw-card { padding: 32px 24px; }
    .step-card { padding: 36px 28px; }
    .qual-col { padding: 36px 28px; }
    .section { padding: 70px 0; }
    .transition-section { padding: 50px 0; }
    .transition-gold { font-size: 1.8rem; }
    footer .container {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
}

/* ========== TOUCH DEVICES ========== */
@media (pointer: coarse) {
    .scroll-progress { top: 0; }
}

/* ========== YOUTUBE FEED ========== */
.yt-feed { padding: 80px 0; overflow-x: clip; overflow-y: visible; }
.yt-feed .container { padding: 0 28px; }
.yt-feed .section-label { margin-bottom: 8px; }
.yt-feed .section-title { margin-bottom: 12px; }
.yt-feed .yt-feed-sub {
    color: var(--text-s); font-size: 1rem; max-width: 560px;
    margin: 0 auto 48px; text-align: center;
}
.yt-scroll-wrap {
    position: relative;
}
.yt-scroll-wrap::before,
.yt-scroll-wrap::after {
    content: '';
    position: absolute;
    top: 0;
    bottom: 16px;
    width: calc((100% - 1060px) / 2);
    min-width: 60px;
    z-index: 4;
    pointer-events: none;
}
.yt-scroll-wrap::before {
    left: 0;
    background: linear-gradient(to right, var(--bg, #FFFFFF) 30%, transparent 100%);
}
.yt-scroll-wrap::after {
    right: 0;
    background: linear-gradient(to left, var(--bg, #FFFFFF) 30%, transparent 100%);
}
.yt-scroll-wrap.yt-no-fade::before,
.yt-scroll-wrap.yt-no-fade::after {
    display: none;
}
.yt-grid {
    display: flex;
    gap: 20px;
    overflow-x: auto;
    scroll-snap-type: none;
    -webkit-overflow-scrolling: touch;
    padding: 0 calc(50% - 170px) 16px;
    scrollbar-width: none;
}
.yt-grid.yt-grid--center {
    justify-content: center;
}
.yt-grid::-webkit-scrollbar { display: none; }
.yt-card {
    flex: 0 0 340px;
    background: var(--card-bg, rgba(0,0,0,0.02));
    border: 2px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    transition: border-color 0.3s, transform 0.2s;
    cursor: pointer;
    text-decoration: none;
    color: inherit;
    display: block;
}
.yt-card:hover {
    border-color: var(--gold);
    transform: translateY(-3px);
}
.yt-thumb {
    position: relative;
    width: 100%;
    aspect-ratio: 16/9;
    overflow: hidden;
    background: #F0F0F0;
}
.yt-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s;
}
.yt-card:hover .yt-thumb img { transform: scale(1.04); }
.yt-play {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    width: 48px; height: 48px;
    background: rgba(0,0,0,0.7);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    opacity: 0.7;
    transition: opacity 0.3s;
}
.yt-card:hover .yt-play { opacity: 1; }
.yt-card.playing .yt-play { display: none; }
.yt-card.playing .yt-thumb img { display: none; }
.yt-card.playing:hover { transform: none; }
.yt-play svg { width: 20px; height: 20px; fill: #fff; margin-left: 2px; }
.yt-thumb iframe {
    position: absolute;
    top: 0; left: 0;
    width: 100%;
    height: 100%;
    border: none;
}
.yt-expand {
    position: absolute;
    top: 8px; right: 8px;
    width: 32px; height: 32px;
    background: rgba(0,0,0,0.7);
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 6px;
    display: none;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 3;
    transition: background 0.2s, border-color 0.2s;
}
.yt-card.playing .yt-expand { display: flex; }
.yt-expand:hover { background: rgba(0,0,0,0.9); border-color: var(--gold); }
.yt-expand svg { width: 14px; height: 14px; stroke: #fff; fill: none; stroke-width: 2; }
.yt-info { padding: 16px 18px; }
.yt-info h4 {
    font-size: 0.92rem;
    font-weight: 600;
    line-height: 1.4;
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.yt-info .yt-date {
    font-size: 0.75rem;
    color: var(--text-m);
    margin-top: 8px;
}
/* Scroll arrows — positioned below cards */
.yt-arrow-row {
    display: flex;
    justify-content: center;
    gap: 16px;
    padding-top: 20px;
}
.yt-arrow {
    width: 44px; height: 44px;
    background: rgba(0,0,0,0.04);
    border: 1px solid var(--border);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    cursor: pointer;
    transition: background 0.2s, border-color 0.2s;
}
.yt-arrow:hover { background: rgba(0,0,0,0.08); border-color: var(--gold); }
.yt-arrow svg { width: 18px; height: 18px; stroke: var(--text); fill: none; stroke-width: 2; }
/* Video lightbox */
.yt-lightbox {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    z-index: 10000;
    background: rgba(0,0,0,0.92);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
}
.yt-lightbox.active { opacity: 1; pointer-events: auto; }
.yt-lightbox-inner {
    width: 90vw;
    max-width: 960px;
    aspect-ratio: 16/9;
    position: relative;
}
.yt-lightbox-inner iframe {
    width: 100%;
    height: 100%;
    border: none;
    border-radius: 8px;
}
.yt-lightbox-close {
    position: absolute;
    top: -44px; right: 0;
    width: 36px; height: 36px;
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    cursor: pointer;
    transition: background 0.2s;
}
.yt-lightbox-close:hover { background: rgba(255,255,255,0.2); }
.yt-lightbox-close svg { width: 16px; height: 16px; stroke: #fff; fill: none; stroke-width: 2; }
@media (max-width: 600px) {
    .yt-card { flex: 0 0 280px; }
    .yt-feed { padding: 60px 0; }
    .yt-arrow { display: none; }
}

/* ========== INDEX PAGE SPECIFICS ========== */
.cards-section {
    padding: 0 28px 80px;
    position: relative;
    z-index: 2;
}
.cards-section .cards-grid {
    max-width: 1140px;
    margin: 0 auto;
}
.cards-section .card {
    padding: 52px 44px;
    cursor: pointer;
    display: block;
}
.cards-section .card p {
    margin-bottom: 36px;
}
.cards-section .card h3 {
    font-size: 1.4rem;
    margin-bottom: 16px;
}
.cards-section .card-num {
    margin-bottom: 28px;
}

@media (max-width: 768px) {
    .cards-section { padding-bottom: 60px; }
    .cards-section .card { padding: 40px 28px; }
}