/* =============================================
   About Page — Vion Society
   Fully responsive: 1200 → 900 → 600 → 480px
   ============================================= */

/* ── Hero ────────────────────────────────────── */
.ab-hero {
    position: relative;
    width: 100%;
    min-height: 100vh;
    display: flex;
    align-items: flex-end;
    padding-bottom: 8rem;
    overflow: hidden;
    background: var(--color-bg);
}

.ab-hero__bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center 35%;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 8s ease;
}

.ab-hero:hover .ab-hero__bg {
    transform: scale(1.03);
}

.ab-hero__overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        160deg,
        rgba(12,12,12,0.15) 0%,
        rgba(12,12,12,0.55) 50%,
        rgba(12,12,12,0.92) 100%
    );
}

.ab-hero__content {
    position: relative;
    z-index: 2;
    max-width: 820px;
}

.ab-hero__eyebrow {
    display: block;
    font-family: var(--font-ui);
    font-size: 0.68rem;
    font-weight: 400;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--color-gold);
    margin-bottom: 1.5rem;
}

.ab-hero__title {
    font-family: var(--font-heading);
    font-size: clamp(3.2rem, 9vw, 9.5rem);
    font-weight: 300;
    color: var(--color-white);
    line-height: 0.92;
    letter-spacing: -0.02em;
    margin-bottom: 2.5rem;
}

.ab-hero__sub {
    font-family: var(--font-body);
    font-size: clamp(0.9rem, 1.5vw, 1.1rem);
    line-height: 1.7;
    color: rgba(255,255,255,0.8);
    max-width: 560px;
    margin-bottom: 0.75rem;
}

.ab-hero__sub--muted {
    color: rgba(255,255,255,0.45);
    font-size: 0.88rem;
    margin-bottom: 2.5rem;
}

.ab-hero__cta {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-ui);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: rgba(255,255,255,0.6);
    border-bottom: 1px solid rgba(255,255,255,0.2);
    padding-bottom: 4px;
    transition: color var(--transition), border-color var(--transition);
}
.ab-hero__cta:hover {
    color: var(--color-white);
    border-color: var(--color-white);
}

/* ── Story ───────────────────────────────────── */
.ab-story {
    background: var(--color-bg);
}

.ab-story__title {
    font-family: var(--font-heading);
    font-size: clamp(2.2rem, 5vw, 4rem);
    font-weight: 300;
    color: var(--color-white);
    margin: 1rem 0 2.5rem;
    line-height: 1.05;
}

.ab-story__body p {
    font-size: 1.05rem;
    line-height: 1.85;
    color: rgba(255,255,255,0.65);
    margin-bottom: 1.5rem;
}
.ab-story__body p:last-child { margin-bottom: 0; }

/* ── Quality Over Quantity ───────────────────── */
.ab-quality {
    padding: var(--spacing-3xl) 0;
    background: var(--color-bg-section);
    overflow: hidden;
}

.ab-quality__inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 6rem;
}

.ab-quality__text {
    padding-left: 2rem;
}

.ab-quality__word {
    display: block;
    font-family: var(--font-heading);
    font-size: clamp(3rem, 7vw, 7.5rem);
    font-weight: 300;
    color: var(--color-white);
    line-height: 0.95;
    letter-spacing: -0.02em;
}

.ab-quality__word--accent {
    color: var(--color-gold);
}

.ab-quality__img-wrap {
    position: relative;
    aspect-ratio: 4 / 5;
    border-radius: var(--radius-md);
    overflow: hidden;
}

.ab-quality__img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    transition: transform 0.8s ease;
}

.ab-quality__img-wrap:hover .ab-quality__img {
    transform: scale(1.04);
}

.ab-quality__img-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(12,12,12,0.35), transparent 60%);
}

/* ── Designed Around You ─────────────────────── */
.ab-designed {
    background: var(--color-bg);
}

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

.ab-designed__title {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 4.5vw, 3.8rem);
    font-weight: 300;
    color: var(--color-white);
    line-height: 1.05;
    margin-top: 1rem;
}

.ab-designed__lead {
    font-size: 1.2rem;
    color: var(--color-white);
    font-family: var(--font-heading);
    line-height: 1.4;
    margin-bottom: 1.25rem;
}

.ab-designed__right p {
    font-size: 1rem;
    line-height: 1.8;
    color: rgba(255,255,255,0.6);
    margin-bottom: 1.25rem;
}
.ab-designed__right p:last-child { margin-bottom: 0; }

/* ── Heaven by VION ──────────────────────────── */
.ab-heaven {
    position: relative;
    min-height: 90vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.ab-heaven__bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center 40%;
    transform: scale(1.04);
    transition: transform 10s ease;
}

.ab-heaven:hover .ab-heaven__bg {
    transform: scale(1);
}

.ab-heaven__overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to right,
        rgba(12,12,12,0.92) 0%,
        rgba(12,12,12,0.7) 55%,
        rgba(12,12,12,0.2) 100%
    );
}

.ab-heaven__content {
    position: relative;
    z-index: 2;
    max-width: 600px;
    padding: var(--spacing-3xl) 0;
}

.ab-heaven__eyebrow {
    display: block;
    font-family: var(--font-ui);
    font-size: 0.65rem;
    font-weight: 500;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: var(--color-gold);
    margin-bottom: 1.25rem;
}

.ab-heaven__title {
    font-family: var(--font-heading);
    font-size: clamp(2.8rem, 6vw, 5.5rem);
    font-weight: 300;
    color: var(--color-white);
    line-height: 0.95;
    margin-bottom: 2rem;
}

.ab-heaven__desc {
    font-size: 1rem;
    line-height: 1.8;
    color: rgba(255,255,255,0.65);
    margin-bottom: 1.25rem;
}

.ab-heaven__tagline {
    margin: 2.5rem 0;
    padding: 1.75rem 2rem;
    border-left: 2px solid var(--color-gold);
    background: rgba(201,169,110,0.06);
}

.ab-heaven__tag-title {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    color: var(--color-white);
    margin-bottom: 0.35rem;
    font-weight: 300;
}

.ab-heaven__tag-sub {
    font-size: 0.85rem;
    color: rgba(255,255,255,0.45);
    letter-spacing: 0.04em;
}

.ab-heaven__cta {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-ui);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--color-gold);
    border-bottom: 1px solid rgba(201,169,110,0.4);
    padding-bottom: 4px;
    transition: border-color var(--transition), opacity var(--transition);
}
.ab-heaven__cta:hover {
    border-color: var(--color-gold);
    opacity: 0.8;
}

/* ── Sri Lanka Through VION ──────────────────── */
.ab-srilanka {
    background: var(--color-bg-section);
}

.ab-srilanka__inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    align-items: stretch;
    min-height: 680px;
}

.ab-srilanka__left {
    position: relative;
    overflow: hidden;
}

.ab-srilanka__media {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.ab-srilanka__overlay-text {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(12,12,12,0.85) 0%, rgba(12,12,12,0.1) 60%);
    display: flex;
    align-items: flex-end;
    padding: 3rem;
}

.ab-srilanka__caption {
    font-family: var(--font-heading);
    font-size: clamp(1.5rem, 3vw, 2.5rem);
    font-weight: 300;
    color: var(--color-white);
    line-height: 1.2;
}

.ab-srilanka__right {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 5rem 4rem;
    background: var(--color-bg);
}

.ab-srilanka__title {
    font-family: var(--font-heading);
    font-size: clamp(2.2rem, 4.5vw, 4rem);
    font-weight: 300;
    color: var(--color-white);
    line-height: 1.0;
    margin: 1rem 0 2rem;
}

.ab-srilanka__right p {
    font-size: 1rem;
    line-height: 1.8;
    color: rgba(255,255,255,0.6);
    margin-bottom: 1.25rem;
}

.ab-srilanka__btn {
    align-self: flex-start;
    margin-top: 1rem;
}

/* ── Discover Sri Lanka (strip) ──────────────── */
.ab-discover {
    background: var(--color-bg);
    overflow: hidden;
}

.ab-discover__title {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 4vw, 3.2rem);
    font-weight: 300;
    color: var(--color-white);
    margin: 0.75rem 0 1rem;
}

.ab-discover__sub {
    font-size: 0.95rem;
    color: rgba(255,255,255,0.5);
    line-height: 1.7;
    max-width: 560px;
    margin-bottom: 3rem;
}

.ab-discover__strip-wrap {
    position: relative;
    padding: 0 0 2.5rem;
}

.ab-discover__strip {
    display: flex;
    gap: 1.5rem;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding: 0 var(--spacing-md);
    padding-left: calc((100vw - var(--container-width, 1160px)) / 2 + var(--spacing-md));
    cursor: grab;
}
.ab-discover__strip:active { cursor: grabbing; }
.ab-discover__strip::-webkit-scrollbar { display: none; }

/* Discover card */
.ab-dcard {
    flex: 0 0 300px;
    scroll-snap-align: start;
    cursor: pointer;
    display: block;
    text-decoration: none;
}

.ab-dcard__img-wrap {
    position: relative;
    aspect-ratio: 3 / 4;
    border-radius: var(--radius-sm);
    overflow: hidden;
    margin-bottom: 0.9rem;
}

.ab-dcard__img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.ab-dcard:hover .ab-dcard__img {
    transform: scale(1.06);
}

.ab-dcard__overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(12,12,12,0.5) 0%, transparent 50%);
    opacity: 0.7;
    transition: opacity var(--transition);
}

.ab-dcard:hover .ab-dcard__overlay {
    opacity: 0.4;
}

.ab-dcard__label {
    font-family: var(--font-ui);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: rgba(255,255,255,0.6);
    transition: color var(--transition);
}

.ab-dcard:hover .ab-dcard__label {
    color: var(--color-white);
}

/* Strip nav buttons */
.ab-strip-btn {
    display: none;
    position: absolute;
    top: 38%;
    transform: translateY(-50%);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 1px solid rgba(255,255,255,0.15);
    background: rgba(12,12,12,0.7);
    color: var(--color-white);
    font-size: 1rem;
    cursor: pointer;
    backdrop-filter: blur(8px);
    transition: border-color var(--transition), background var(--transition);
    z-index: 5;
}

.ab-strip-btn:hover {
    border-color: rgba(255,255,255,0.5);
    background: rgba(12,12,12,0.9);
}

.ab-strip-btn--prev { left: 1.5rem; }
.ab-strip-btn--next { right: 1.5rem; }

@media (min-width: 900px) {
    .ab-strip-btn { display: flex; align-items: center; justify-content: center; }
}

/* ── Animate on scroll ───────────────────────── */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.animate-on-scroll.is-visible {
    opacity: 1;
    transform: none;
}

.animate-on-scroll[data-delay="1"] { transition-delay: 0.1s; }
.animate-on-scroll[data-delay="2"] { transition-delay: 0.2s; }
.animate-on-scroll[data-delay="3"] { transition-delay: 0.3s; }
.animate-on-scroll[data-delay="4"] { transition-delay: 0.4s; }

/* ══════════════════════════════════════════
   RESPONSIVE — tablet (≤ 900px)
   ══════════════════════════════════════════ */
@media (max-width: 900px) {

    /* Hero */
    .ab-hero {
        padding-bottom: 5rem;
        align-items: flex-end;
    }

    /* Quality — image first, text second */
    .ab-quality__inner {
        grid-template-columns: 1fr;
        gap: 0;
    }
    .ab-quality__text {
        padding: 3rem var(--spacing-md) 2rem;
        order: 2;
    }
    .ab-quality__img-wrap {
        order: 1;
        aspect-ratio: 16 / 9;
        border-radius: 0;
    }

    /* Philosophy */
    .ab-designed__inner {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }

    /* Heaven */
    .ab-heaven__content { max-width: 100%; }
    .ab-heaven__overlay { background: rgba(12,12,12,0.8); }

    /* Sri Lanka */
    .ab-srilanka__inner {
        grid-template-columns: 1fr;
        gap: 0;
        min-height: auto;
    }
    .ab-srilanka__left  { min-height: 56vw; }
    .ab-srilanka__right { padding: 3rem var(--spacing-md); }
    .ab-srilanka__btn   { align-self: stretch; text-align: center; justify-content: center; }

    /* Discover strip */
    .ab-dcard { flex: 0 0 72vw; }
    .ab-discover__strip { padding-left: var(--spacing-md); }
}

/* ══════════════════════════════════════════
   RESPONSIVE — mobile (≤ 600px)
   ══════════════════════════════════════════ */
@media (max-width: 600px) {

    /* Hero */
    .ab-hero {
        padding-bottom: 3.5rem;
        min-height: 100svh;
    }
    .ab-hero__title {
        font-size: clamp(2.8rem, 13vw, 4.5rem);
        margin-bottom: 1.75rem;
    }
    .ab-hero__sub { font-size: 0.9rem; }

    /* Story */
    .ab-story__title { font-size: clamp(2rem, 8vw, 2.8rem); }
    .ab-story__body p { font-size: 0.97rem; }

    /* Quality */
    .ab-quality__word { font-size: clamp(2.8rem, 11vw, 4.5rem); }
    .ab-quality__text { padding: 2.5rem var(--spacing-sm) 1.75rem; }

    /* Philosophy */
    .ab-designed__title  { font-size: clamp(1.9rem, 8vw, 2.6rem); }
    .ab-designed__lead   { font-size: 1.05rem; }

    /* Heaven */
    .ab-heaven { min-height: auto; padding: 5rem 0; }
    .ab-heaven__title { font-size: clamp(2.4rem, 10vw, 3.5rem); }
    .ab-heaven__tagline { padding: 1.25rem 1.25rem; }

    /* Sri Lanka */
    .ab-srilanka__left  { min-height: 70vw; }
    .ab-srilanka__caption { font-size: clamp(1.3rem, 5vw, 1.8rem); }
    .ab-srilanka__right { padding: 2.5rem var(--spacing-sm); }
    .ab-srilanka__title { font-size: clamp(2rem, 8vw, 2.8rem); }

    /* Discover */
    .ab-dcard           { flex: 0 0 80vw; }
    .ab-discover__title { font-size: clamp(1.8rem, 7vw, 2.4rem); }
    .ab-discover__sub   { font-size: 0.88rem; }
    .ab-discover__strip { gap: 1rem; padding-left: var(--spacing-sm); }
}

/* ══════════════════════════════════════════
   RESPONSIVE — small phones (≤ 480px)
   ══════════════════════════════════════════ */
@media (max-width: 480px) {

    .ab-hero { padding-bottom: 2.5rem; }
    .ab-hero__eyebrow { font-size: 0.62rem; letter-spacing: 0.18em; margin-bottom: 1rem; }
    .ab-hero__title   { font-size: clamp(2.5rem, 14vw, 3.5rem); margin-bottom: 1.5rem; }

    .ab-heaven__tagline { padding: 1rem 1rem; }
    .ab-heaven__tag-title { font-size: 1.25rem; }

    .ab-srilanka__overlay-text { padding: 1.5rem; }

    .ab-dcard { flex: 0 0 88vw; }

    .ab-strip-btn { display: none !important; }
}