/* ============================================
   Kripton – About Page
   ============================================ */

@font-face {
    font-family: 'Outfit';
    src: url('../fonts/Outfit/Outfit-VariableFont_wght.ttf') format('truetype');
    font-weight: 100 900;
    font-style: normal;
    font-display: swap;
}

/* ── Shared utilities ─────────────────────── */
.ab-label {
    font-size: 0.68rem;
    letter-spacing: 0.24em;
    text-transform: uppercase;
    font-weight: 500;
    color: #888;
    margin-bottom: 1.5rem;
    display: block;
}

.ab-label--light { color: rgba(255,255,255,0.45); }

.ab-link {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.75rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    font-weight: 500;
    color: #0a0a0a;
    border-bottom: 1px solid rgba(0,0,0,0.25);
    padding-bottom: 3px;
    text-decoration: none;
    transition: border-color 0.3s ease;
}

.ab-link svg {
    width: 22px; height: 11px;
    stroke: currentColor; fill: none; stroke-width: 1.5;
    transition: transform 0.3s ease;
}

.ab-link:hover { border-color: #0a0a0a; }
.ab-link:hover svg { transform: translateX(5px); }

/* GSAP initial states */
.ab-reveal {
    opacity: 0;
    transform: translateY(36px);
}

/* ── 1. HERO ──────────────────────────────── */
.ab-hero {
    position: relative;
    min-height: 100vh;
    background-color: #0a0a0a;
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: flex-end;
    overflow: hidden;
}

.ab-hero::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.72) 0%, rgba(0,0,0,0.25) 60%, rgba(0,0,0,0.1) 100%);
    pointer-events: none;
}

.ab-hero__img { display: none; }

.ab-hero__overlay { display: none; }

.ab-hero__content {
    position: relative;
    z-index: 2;
    padding: 5rem 5rem 6rem;
    max-width: 1440px;
    margin: 0 auto;
    width: 100%;
}

.ab-hero__eyebrow {
    font-size: 0.68rem;
    letter-spacing: 0.28em;
    text-transform: uppercase;
    color: rgba(255,255,255,0.7);
    font-weight: 500;
    margin-bottom: 2.5rem;
    display: block;
}

.ab-hero__title {
    font-size: clamp(1.6rem, 3vw, 2.8rem);
    font-weight: 300;
    letter-spacing: -0.02em;
    line-height: 1.2;
    color: #ffffff;
    margin-bottom: 1.25rem;
}

.ab-hero__sub {
    font-size: 0.95rem;
    font-weight: 300;
    color: rgba(255,255,255,0.7);
    line-height: 1.7;
    max-width: 480px;
    margin-bottom: 2rem;
}

.ab-hero__line {
    width: 3rem;
    height: 1px;
    background: rgba(200,169,110,0.7);
}

.ab-anim--d1 { transition-delay: 0.1s; }
.ab-anim--d2 { transition-delay: 0.2s; }
.ab-anim--d3 { transition-delay: 0.3s; }
.ab-anim--d4 { transition-delay: 0.4s; }
.ab-anim--d5 { transition-delay: 0.5s; }

.ab-hero__scroll {
    position: absolute;
    bottom: 2.5rem;
    right: 3rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: rgba(255,255,255,0.3);
    font-size: 0.62rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
}

.ab-hero__scroll-line {
    width: 1px;
    height: 40px;
    background: rgba(255,255,255,0.2);
    position: relative;
    overflow: hidden;
}

.ab-hero__scroll-line::after {
    content: '';
    position: absolute;
    top: -100%; left: 0;
    width: 100%; height: 100%;
    background: rgba(200,169,110,0.8);
    animation: scrollLine 2s ease-in-out infinite;
}

@keyframes scrollLine { 0% { top: -100%; } 100% { top: 100%; } }

/* ── 2. BRAND STORY ───────────────────────── */
.ab-story {
    padding: 10rem 5rem;
    background: #ffffff;
    max-width: 1440px;
    margin: 0 auto;
}

.ab-story__grid {
    display: grid;
    grid-template-columns: 1fr 1.4fr;
    gap: 6rem;
    align-items: start;
}

.ab-story__heading {
    font-size: clamp(2.5rem, 5vw, 5rem);
    font-weight: 200;
    letter-spacing: -0.03em;
    line-height: 1.05;
    color: #0a0a0a;
    margin-bottom: 3rem;
}

.ab-story__stat {
    display: flex;
    align-items: baseline;
    gap: 1rem;
    padding-top: 2rem;
    border-top: 1px solid #e0e0e0;
}

.ab-story__stat-num {
    font-size: clamp(3rem, 6vw, 5.5rem);
    font-weight: 200;
    letter-spacing: -0.04em;
    color: #c8a96e;
    line-height: 1;
}

.ab-story__stat-label {
    font-size: 0.78rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: #888;
    line-height: 1.5;
}

.ab-story__body {
    font-size: 1.05rem;
    font-weight: 300;
    color: #444;
    line-height: 1.85;
    margin-bottom: 1.75rem;
}

.ab-story__body em {
    font-style: normal;
    color: #0a0a0a;
    font-weight: 400;
}

/* ── 3. IMPACT ────────────────────────────── */
.ab-impact {
    padding: 8rem 5rem;
    background: #f7f5f2;
}

.ab-impact__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
    border-top: 1px solid #d8d4ce;
    border-left: 1px solid #d8d4ce;
    margin-bottom: 6rem;
}

.ab-impact__item {
    padding: 3.5rem 2.5rem;
    border-right: 1px solid #d8d4ce;
    border-bottom: 1px solid #d8d4ce;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.ab-impact__num {
    font-size: clamp(2.5rem, 4vw, 4rem);
    font-weight: 200;
    letter-spacing: -0.04em;
    color: #0a0a0a;
    line-height: 1;
}

.ab-impact__desc {
    font-size: 0.78rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: #888;
    line-height: 1.5;
}

.ab-impact__statement {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.ab-impact__statement blockquote {
    font-size: clamp(1.2rem, 2.5vw, 1.8rem);
    font-weight: 200;
    letter-spacing: -0.02em;
    line-height: 1.5;
    color: #0a0a0a;
    font-style: italic;
    border: none;
    padding: 0;
    margin: 0;
}

/* ── 4. BIOLOGY ───────────────────────────── */
.ab-biology {
    position: relative;
    background: #0a0a0a;
    padding: 10rem 5rem;
    overflow: hidden;
}

.ab-biology__glow {
    position: absolute;
    top: 50%;
    left: 30%;
    transform: translate(-50%, -50%);
    width: 60vw;
    height: 60vw;
    background: radial-gradient(ellipse at center,
        rgba(200,169,110,0.14) 0%,
        rgba(255,200,100,0.06) 40%,
        transparent 70%);
    pointer-events: none;
    animation: glowPulse 8s ease-in-out infinite alternate;
}

.ab-biology__content {
    position: relative;
    z-index: 2;
    max-width: 760px;
    margin: 0 auto;
}

.ab-biology__heading {
    font-size: clamp(2.5rem, 5vw, 5rem);
    font-weight: 200;
    letter-spacing: -0.03em;
    line-height: 1.05;
    color: #ffffff;
    margin-bottom: 2.5rem;
}

.ab-biology__body {
    font-size: 1rem;
    font-weight: 300;
    color: rgba(255,255,255,0.6);
    line-height: 1.85;
    margin-bottom: 1.5rem;
}

/* Circadian rhythm bar */
.ab-biology__rhythm {
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.ab-biology__rhythm-bar {
    display: flex;
    justify-content: space-between;
    position: relative;
    padding-bottom: 1.5rem;
}

.ab-biology__rhythm-bar::before {
    content: '';
    position: absolute;
    bottom: 0; left: 0; right: 0;
    height: 4px;
    border-radius: 2px;
    background: linear-gradient(to right,
        #c8a96e 0%,
        #fff8e0 25%,
        #ffffff 50%,
        #ffe0a0 75%,
        #1a1a2e 100%);
}

.ab-biology__rhythm-label {
    font-size: 0.65rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: rgba(255,255,255,0.35);
}

/* ── 5. HUMAN CENTRIC LIGHTING ────────────── */
.ab-hcl {
    padding: 10rem 5rem;
    background: #ffffff;
}

.ab-hcl__header {
    max-width: 1440px;
    margin: 0 auto 5rem;
}

.ab-hcl__heading {
    font-size: clamp(2rem, 4vw, 3.5rem);
    font-weight: 200;
    letter-spacing: -0.03em;
    line-height: 1.1;
    color: #0a0a0a;
}

.ab-hcl__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2px;
    background: #e8e4de;
    max-width: 1440px;
    margin: 0 auto;
}

.ab-hcl__card {
    background: #ffffff;
    padding: 3rem 2.5rem;
    transition: background 0.35s ease, transform 0.35s ease, box-shadow 0.35s ease;
    cursor: default;
}

.ab-hcl__card:hover {
    background: #f7f5f2;
    transform: translateY(-6px);
    box-shadow: 0 16px 48px rgba(0,0,0,0.07);
    z-index: 1;
    position: relative;
}

.ab-hcl__card-icon {
    width: 44px;
    height: 44px;
    margin-bottom: 2rem;
}

.ab-hcl__card-icon svg {
    width: 100%;
    height: 100%;
    stroke: #c8a96e;
    fill: none;
    stroke-width: 1;
}

.ab-hcl__card-title {
    font-size: 1rem;
    font-weight: 400;
    letter-spacing: 0.04em;
    color: #0a0a0a;
    margin-bottom: 0.75rem;
}

.ab-hcl__card-body {
    font-size: 0.85rem;
    font-weight: 300;
    color: #666;
    line-height: 1.7;
}

/* ── 6. PHILOSOPHY ────────────────────────── */
.ab-philosophy {
    padding: 10rem 5rem;
    background: #0a0a0a;
}

.ab-philosophy__header {
    max-width: 1440px;
    margin: 0 auto 6rem;
}

.ab-philosophy__heading {
    font-size: clamp(2rem, 4vw, 3.5rem);
    font-weight: 200;
    letter-spacing: -0.03em;
    line-height: 1.1;
    color: #ffffff;
}

.ab-philosophy__pillars {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 0;
    border-top: 1px solid rgba(255,255,255,0.1);
    max-width: 1440px;
    margin: 0 auto;
}

.ab-pillar {
    padding: 3rem 2rem 3rem 0;
    border-right: 1px solid rgba(255,255,255,0.08);
    padding-right: 2rem;
}

.ab-pillar:last-child { border-right: none; }

.ab-pillar__num {
    display: block;
    font-size: 0.65rem;
    letter-spacing: 0.2em;
    color: #c8a96e;
    margin-bottom: 1.5rem;
    font-weight: 500;
}

.ab-pillar__title {
    font-size: 1rem;
    font-weight: 400;
    color: #ffffff;
    letter-spacing: 0.04em;
    margin-bottom: 1rem;
}

.ab-pillar__body {
    font-size: 0.82rem;
    font-weight: 300;
    color: rgba(255,255,255,0.45);
    line-height: 1.7;
}

/* ── 7. CLOSING ───────────────────────────── */
.ab-closing {
    position: relative;
    min-height: 80vh;
    background: #0a0a0a;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    border-top: 1px solid rgba(255,255,255,0.06);
}

.ab-closing__glow {
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse 60% 50% at 50% 50%,
        rgba(200,169,110,0.12) 0%,
        transparent 70%);
    pointer-events: none;
    animation: glowPulse 7s ease-in-out infinite alternate;
}

.ab-closing__content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 4rem 2rem;
}

.ab-closing__statement {
    font-size: clamp(2.5rem, 6vw, 6rem);
    font-weight: 200;
    letter-spacing: -0.04em;
    line-height: 1.05;
    color: #ffffff;
    margin-bottom: 3rem;
}

.ab-closing__cta {
    display: inline-flex;
    align-items: center;
    gap: 1rem;
    font-size: 0.75rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    font-weight: 500;
    color: #ffffff;
    text-decoration: none;
    border-bottom: 1px solid rgba(255,255,255,0.3);
    padding-bottom: 3px;
    transition: border-color 0.3s ease;
}

.ab-closing__cta svg {
    width: 22px; height: 11px;
    stroke: currentColor; fill: none; stroke-width: 1.5;
    transition: transform 0.3s ease;
}

.ab-closing__cta:hover { border-color: #ffffff; }
.ab-closing__cta:hover svg { transform: translateX(5px); }

/* ── Responsive ───────────────────────────── */
@media (max-width: 1024px) {
    .ab-story { padding: 7rem 3rem; }
    .ab-story__grid { grid-template-columns: 1fr; gap: 3rem; }
    .ab-impact { padding: 6rem 3rem; }
    .ab-impact__grid { grid-template-columns: repeat(2, 1fr); }
    .ab-biology { padding: 7rem 3rem; }
    .ab-hcl { padding: 7rem 3rem; }
    .ab-hcl__grid { grid-template-columns: repeat(2, 1fr); }
    .ab-philosophy { padding: 7rem 3rem; }
    .ab-philosophy__pillars { grid-template-columns: repeat(3, 1fr); gap: 0; }
}

@media (max-width: 768px) {
    .ab-hero__content { padding: 3rem 2rem 4rem; }
    .ab-hero__title { font-size: clamp(2.5rem, 10vw, 4rem); }
    .ab-story { padding: 5rem 2rem; }
    .ab-impact { padding: 5rem 2rem; }
    .ab-impact__grid { grid-template-columns: repeat(2, 1fr); }
    .ab-biology { padding: 5rem 2rem; }
    .ab-hcl { padding: 5rem 2rem; }
    .ab-hcl__grid { grid-template-columns: 1fr; }
    .ab-philosophy { padding: 5rem 2rem; }
    .ab-philosophy__pillars { grid-template-columns: 1fr 1fr; }
    .ab-pillar { border-right: none; border-bottom: 1px solid rgba(255,255,255,0.08); padding: 2rem 0; }
    .ab-closing__statement { font-size: clamp(2rem, 8vw, 3.5rem); }
}

@media (max-width: 480px) {
    .ab-impact__grid { grid-template-columns: 1fr; }
    .ab-philosophy__pillars { grid-template-columns: 1fr; }
}