/* ============================================================
   AIHIO — Stylesheet
   A digital extension of an exhibition.
   Black · White · Neutral · Quiet
   ============================================================ */

:root {
    --black: #0a0a0a;
    --ink: #141414;
    --paper: #ffffff;
    --bone: #f4f1ec;
    --stone: #d9d5cd;
    --muted: #8a8a8a;
    --line: rgba(0, 0, 0, 0.10);
    --line-dark: rgba(255, 255, 255, 0.14);

    --sans: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
    --verdana: Verdana, Geneva, "DejaVu Sans", sans-serif;

    --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--sans);
    font-weight: 300;
    color: var(--ink);
    background: var(--paper);
    line-height: 1.7;
    overflow-x: hidden;
}

img { display: block; max-width: 100%; height: auto; }
a   { color: inherit; text-decoration: none; }

.container {
    width: 100%;
    max-width: 1180px;
    margin: 0 auto;
    padding: 0 28px;
}

/* ============================================================
   TYPOGRAPHY HELPERS
   ============================================================ */
.eyebrow {
    font-size: 11px;
    font-weight: 400;
    letter-spacing: 0.36em;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 36px;
}

.eyebrow--light { color: rgba(255, 255, 255, 0.5); }

/* ============================================================
   ENTRANCE ANIMATIONS
   ============================================================ */

/* Hero: fade-in immediately on load */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 1.6s var(--ease) forwards;
}
@keyframes fadeInUp {
    to { opacity: 1; transform: translateY(0); }
}

/* Reveal on scroll */
.reveal {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 1.4s var(--ease), transform 1.4s var(--ease);
}
.reveal.is-visible { opacity: 1; transform: translateY(0); }

/* ============================================================
   NAV — white logo, transparent on hero, dark band when scrolled
   ============================================================ */
.nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    padding: 18px 28px;
    transition: background 0.45s var(--ease),
                padding 0.45s var(--ease),
                box-shadow 0.45s var(--ease);
}

.nav.is-scrolled {
    background: rgba(10, 10, 10, 0.92);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    padding: 10px 28px;
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.06);
}

.nav__brand { display: inline-flex; align-items: center; }

.nav__logo {
    height: 44px;
    width: auto;
    display: block;
}

.nav.is-scrolled .nav__logo { height: 34px; }

/* ============================================================
   HERO — sized to the video itself, never to 100vh
   ============================================================ */
.hero {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;       /* hugs the video aspect */
    max-height: 100vh;          /* never taller than the screen */
    overflow: hidden;
    background: var(--black);
}

.hero__video-wrap {
    position: absolute;
    inset: 0;
    z-index: 1;
    overflow: hidden;
    background: var(--black);
    pointer-events: none;
}

/* Self-hosted <video> — contain keeps the full frame visible even
   when the hero is forced taller than 16:9 (e.g. mobile with the
   490px min-height). The black bars match the hero background. */
.hero__video {
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center;
    background: var(--black);
    display: block;
    border: 0;
}

/* ============================================================
   SCROLL INDICATOR — desktop hint, hidden on mobile
   ============================================================ */
.hero__scroll {
    position: absolute;
    left: 50%;
    bottom: 26px;
    transform: translateX(-50%);
    z-index: 3;
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    color: rgba(255, 255, 255, 0.92);
    text-decoration: none;
    text-shadow: 0 1px 10px rgba(0, 0, 0, 0.45);
    animation-delay: 1.4s;
    transition: opacity 0.4s var(--ease);
}

.hero__scroll:hover { opacity: 0.7; }

.hero__scroll-label {
    font-family: var(--verdana);
    font-size: 10px;
    letter-spacing: 0.4em;
    text-transform: uppercase;
}

.hero__scroll::after {
    content: "";
    width: 1px;
    height: 28px;
    background: rgba(255, 255, 255, 0.9);
    transform-origin: top;
    animation: scrollLine 2.4s var(--ease) infinite 2s;
}

@keyframes scrollLine {
    0%   { transform: scaleY(0); transform-origin: top; }
    50%  { transform: scaleY(1); transform-origin: top; }
    51%  { transform-origin: bottom; }
    100% { transform: scaleY(0); transform-origin: bottom; }
}

/* hidden on small screens — mobile users don't need a "scroll" cue */
@media (max-width: 720px) {
    .hero__scroll { display: none; }
}

/* ============================================================
   HERO SOUND TOGGLE — small bottom-right button
   ============================================================ */
.hero__sound {
    position: absolute;
    right: 22px;
    bottom: 22px;
    z-index: 4;
    padding: 10px 16px;
    background: rgba(0, 0, 0, 0.35);
    border: 1px solid rgba(255, 255, 255, 0.5);
    color: var(--paper);
    cursor: pointer;
    font-family: var(--verdana);
    font-size: 10px;
    letter-spacing: 0.32em;
    text-transform: uppercase;
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    transition: background 0.4s var(--ease),
                border-color 0.4s var(--ease),
                letter-spacing 0.4s var(--ease);
}

.hero__sound:hover {
    background: rgba(0, 0, 0, 0.6);
    border-color: var(--paper);
    letter-spacing: 0.36em;
}

.hero__sound[aria-pressed="false"] .hero__sound-label::after { content: " — off"; }
.hero__sound[aria-pressed="true"]  .hero__sound-label::after { content: " — on"; }

/* ============================================================
   INTRO — short introduction paragraph
   ============================================================ */
.intro {
    padding: 130px 0 110px;
    background: var(--paper);
    text-align: center;
}

.intro__inner { max-width: 760px; }

.intro__lead {
    font-family: var(--verdana);
    font-weight: 400;
    font-size: clamp(18px, 2vw, 24px);
    line-height: 1.6;
    color: var(--ink);
    max-width: 680px;
    margin: 0 auto;
}

/* ============================================================
   FEATURE — image2 from client doc, sits between intro & statement
   ============================================================ */
.feature {
    padding: 40px 0 0;
    background: var(--paper);
}

.feature__figure {
    margin: 0;
    overflow: hidden;
    background: var(--stone);
}

.feature__figure img {
    width: 100%;
    height: auto;
    max-height: 78vh;
    object-fit: cover;
    display: block;
    transition: transform 2s var(--ease);
}

.feature__figure:hover img { transform: scale(1.02); }

/* ============================================================
   STATEMENT — "Born through dialogue…" paragraph
   ============================================================ */
.statement {
    padding: 110px 0 140px;
    background: var(--paper);
    text-align: center;
}

.statement__inner { max-width: 760px; }

.statement__lead {
    font-family: var(--verdana);
    font-weight: 400;
    font-size: clamp(20px, 2.2vw, 28px);
    line-height: 1.5;
    color: var(--ink);
    margin-bottom: 24px;
}

.statement__sub {
    font-family: var(--verdana);
    font-weight: 400;
    font-size: clamp(15px, 1.3vw, 17px);
    line-height: 1.7;
    color: #2a2a2a;
    max-width: 580px;
    margin: 0 auto;
}

/* ============================================================
   BLOCK — single Nordic pattern used for every content section:
   Available for · Typical environments · Collaboration · Tech specs
   ============================================================ */
.block {
    padding: 130px 0;
}

.block--white  { background: var(--paper); }
.block--beige  { background: var(--bone); }

.block__inner {
    max-width: 680px;
    margin: 0 auto;
    text-align: center;
}

.block__title {
    font-family: var(--verdana);
    font-weight: 700;
    font-size: clamp(20px, 2vw, 24px);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--ink);
    margin-bottom: 36px;
}

.block__lead {
    font-family: var(--verdana);
    font-weight: 400;
    font-size: 15px;
    line-height: 1.75;
    color: var(--ink);
    max-width: 540px;
    margin: 0 auto 28px;
}

.block__sub-label {
    font-family: var(--verdana);
    font-weight: 700;
    font-size: 11px;
    letter-spacing: 0.28em;
    text-transform: uppercase;
    color: var(--ink);
    margin: 32px auto 14px;
}

.block__list {
    list-style: none;
    padding: 0;
    margin: 0 auto;
    max-width: 520px;
    text-align: left;
}

.block__list li {
    font-family: var(--verdana);
    font-weight: 400;
    font-size: 15px;
    line-height: 1.5;
    color: var(--ink);
    padding: 14px 4px;
    border-top: 1px solid var(--line);
}

.block__list li:last-child { border-bottom: 1px solid var(--line); }

.block__lead-time {
    font-family: var(--verdana);
    font-weight: 400;
    font-size: 14px;
    color: var(--ink);
    margin: 32px auto 6px;
}

.block__note {
    font-family: var(--verdana);
    font-weight: 400;
    font-size: 13px;
    line-height: 1.7;
    color: var(--muted);
    font-style: italic;
    max-width: 460px;
    margin: 20px auto 0;
}

/* ============================================================
   CTA — begin a project collaboration
   ============================================================ */
.cta {
    padding: 140px 0;
    background: var(--black);
    color: var(--paper);
    text-align: center;
}

.cta__inner { max-width: 700px; margin: 0 auto; }

.cta__title {
    font-family: var(--verdana);
    font-weight: 400;
    font-size: clamp(24px, 3vw, 36px);
    line-height: 1.35;
    color: var(--paper);
    margin-bottom: 48px;
}

.cta__btn {
    display: inline-block;
    font-family: var(--verdana);
    font-weight: 700;
    font-size: 13px;
    letter-spacing: 0.28em;
    text-transform: uppercase;
    color: var(--paper);
    padding: 18px 36px;
    border: 1px solid rgba(255, 255, 255, 0.5);
    transition: background 0.4s var(--ease),
                color 0.4s var(--ease),
                border-color 0.4s var(--ease),
                letter-spacing 0.4s var(--ease);
}

.cta__btn:hover {
    background: var(--paper);
    color: var(--black);
    border-color: var(--paper);
    letter-spacing: 0.32em;
}

/* ============================================================
   FOOTER — 3-block layout: brand | soundscape | social
   ============================================================ */
.footer {
    background: var(--black);
    color: var(--paper);
    border-top: 1px solid var(--line-dark);
}

.footer__inner {
    display: grid;
    grid-template-columns: 1fr 1.4fr;
    gap: 80px;
    padding: 90px 28px 72px;
    align-items: start;
}

/* brand */
.footer__brand-block {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 20px;
}

.footer__logo {
    width: 130px;
    height: auto;
    display: block;
}

.footer__handmade {
    font-family: var(--verdana);
    font-size: 12px;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.75);
}

/* words */
.footer__words {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.footer__note {
    font-family: var(--verdana);
    font-size: 14px;
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.78);
}

.footer__note strong {
    color: var(--paper);
    font-weight: 700;
}

.footer__demo-link {
    font-family: var(--verdana);
    font-size: 12px;
    letter-spacing: 0.28em;
    text-transform: uppercase;
    color: var(--paper);
    padding-bottom: 6px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.5);
    align-self: flex-start;
    transition: letter-spacing 0.4s var(--ease),
                border-color 0.4s var(--ease);
}

.footer__demo-link:hover {
    letter-spacing: 0.32em;
    border-bottom-color: var(--paper);
}


.footer__base {
    border-top: 1px solid var(--line-dark);
    padding: 24px 28px;
    text-align: center;
    font-family: var(--verdana);
    font-size: 11px;
    letter-spacing: 0.24em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.5);
}

/* ============================================================
   RESPONSIVE — tighten everything for tablet & mobile
   ============================================================ */
@media (max-width: 1024px) {
    .container { padding: 0 24px; }

    .intro     { padding: 100px 0 70px; }
    .feature   { padding: 30px 0 0; }
    .statement { padding: 80px 0 110px; }
    .block     { padding: 90px 0; }
    .cta       { padding: 100px 0; }

    .footer__inner {
        grid-template-columns: 1fr;
        gap: 48px;
        padding: 70px 24px 50px;
    }
}

@media (max-width: 720px) {
    .nav            { padding: 14px 18px; }
    .nav.is-scrolled{ padding: 8px 18px; }
    .nav__logo      { height: 36px; }
    .nav.is-scrolled .nav__logo { height: 30px; }

    /* taller hero on mobile — gives the banner real presence */
    .hero { min-height: 290px; }

    .container { padding: 0 20px; }

    /* tighter rhythm */
    .intro      { padding: 56px 0 40px; }
    .feature    { padding: 16px 0 0; }
    .statement  { padding: 48px 0 56px; }
    .block      { padding: 56px 0; }
    .cta        { padding: 72px 0 96px; }

    /* smaller body / lead fonts per client feedback */
    .intro__lead     { font-size: 15px; line-height: 1.65; }
    .statement__lead { font-size: 17px; line-height: 1.5; }
    .statement__sub  { font-size: 14px; }

    /* unified block scaling on mobile */
    .block__title    { font-size: 16px; letter-spacing: 0.18em; margin-bottom: 26px; }
    .block__lead     { font-size: 14px; line-height: 1.65; }
    .block__list li  { font-size: 14px; padding: 12px 4px; }
    .block__sub-label{ font-size: 11px; letter-spacing: 0.24em; }
    .block__lead-time{ font-size: 13px; }
    .block__note     { font-size: 12px; }

    .cta__title { font-size: 22px; margin-bottom: 36px; }
    .cta__btn   { font-size: 12px; padding: 16px 28px; letter-spacing: 0.24em; }

    .eyebrow        { margin-bottom: 22px; letter-spacing: 0.28em; font-size: 10px; }

    .footer__inner    { padding: 100px 24px 50px; }
    .footer__logo     { width: 110px; }
    .footer__handmade { font-size: 11px; }
    .footer__note     { font-size: 13px; }
    .footer__base     { padding: 18px 24px; font-size: 10px; }
}

/* ============================================================
   ACCESSIBILITY
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
    .fade-in, .reveal { opacity: 1; transform: none; animation: none; transition: none; }
    html { scroll-behavior: auto; }
}