/* =========================
   VARIABLES + BASE
========================= */
:root {
    --bg: #07080c;
    --fg: #eef0ff;
    --muted: rgba(238, 240, 255, .78);
    --max: 980px;

    --font-body: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial;
    --font-title: "Space Grotesk", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial;

    /* assets */
    --poster: url("gafa_poster_3840.webp");
}

* {
    box-sizing: border-box;
}

html,
body {
    height: 100%;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: var(--font-body);
    color: var(--fg);
    background: var(--bg);
    overflow-x: hidden;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-title);
    letter-spacing: -0.02em;
}

a {
    color: inherit;
}

/* Lock scroll until user enters */
body.is-locked {
    overflow: hidden;
    height: 100vh;
}

body.is-locked .controls,
body.is-locked .arrow {
    opacity: 0;
    pointer-events: none;
}

/* =========================
   HERO (poster + video)
========================= */
.hero {
    position: relative;
    width: 100%;

    height: 100vh;   /* fallback */
    height: 100svh; /* viewport "stable" iOS */
    height: 100dvh; /* viewport "dynamique" iOS */
    overflow: hidden;

    /* fallback */
    background-color: #9AAEA6;

    /* poster */
    background-image: var(--poster);
    background-position: center;
    background-size: cover;
    background-repeat: no-repeat;
}

/* vignette */
.hero::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 2;
    pointer-events: none;
    background: radial-gradient(1200px 700px at 50% 45%,
            rgba(0, 0, 0, .06) 0%,
            rgba(0, 0, 0, .22) 55%,
            rgba(0, 0, 0, .45) 100%);
}

.hero video {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    pointer-events: none;
    z-index: 1;
    background: var(--poster) center/cover no-repeat;
    opacity: 0;
    transition: opacity .35s ease;
    transform: translateZ(0);
    will-change: transform;
}

.hero video.is-ready {
    opacity: 1;
}

/* =========================
   ENTER OVERLAY
========================= */
.enterOverlay {
    position: fixed;
    inset: 0;
    z-index: 6;
    display: grid;
    place-items: center;
    background: rgba(0, 0, 0, .28);
    transition: opacity .15s ease;
}

.enterOverlay.is-hidden {
    opacity: 0;
    pointer-events: none;
}

.enterBtn {
    padding: 16px 28px;
    border-radius: 999px;
    border: 1px solid rgba(238, 240, 255, .22);
    background: rgba(255, 255, 255, .14);
    color: rgba(238, 240, 255, .92);

    font-family: var(--font-title);
    font-size: 12.5px;
    font-weight: 600;
    letter-spacing: .08px;

    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);

    cursor: pointer;
    transition: transform .14s ease, background .14s ease;
}

.enterBtn:hover {
    background: rgba(255, 255, 255, .20);
    transform: translateY(-1px);
}

.enterBtn:focus-visible {
    outline: 2px solid rgba(238, 240, 255, .28);
    outline-offset: 3px;
}

/* =========================
   HERO CONTROLS (audio / replay / arrow)
========================= */
.controls,
.arrow {
    pointer-events: auto;
    z-index: 5;
}

.controls {
    position: absolute;
    left: 50%;
    bottom: 150px;
    transform: translateX(-50%);
    display: flex;
    gap: 14px;
    align-items: center;
    justify-content: center;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    white-space: nowrap;

    padding: 14px 22px;
    border-radius: 999px;

    border: 1px solid rgba(238, 240, 255, .18);
    background: rgba(255, 255, 255, .12);
    color: rgba(238, 240, 255, .92);

    font-family: var(--font-title);
    font-size: 12.5px;
    font-weight: 600;
    letter-spacing: .08px;

    cursor: pointer;
    user-select: none;

    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);

    transition: background .14s ease, transform .14s ease, border-color .14s ease;
}

.btn:hover {
    background: rgba(255, 255, 255, .20);
    transform: translateY(-1px);
}

.btn:focus-visible {
    outline: 2px solid rgba(238, 240, 255, .28);
    outline-offset: 2px;
}

.arrow {
    position: absolute;
    left: 50%;
    bottom: 6px;
    transform: translateX(-50%);
    border: 0;
    background: transparent;
    padding: 10px;
    cursor: pointer;
    animation: bob 1.8s ease-in-out infinite;
}

.arrow:hover {
    transform: translateX(-50%) translateY(-2px);
}

.arrow:focus-visible {
    outline: 2px solid rgba(255, 255, 255, .30);
    outline-offset: 6px;
    border-radius: 10px;
}

.arrow-icon {
    width: 78px;
    height: 78px;
    color: rgba(255, 255, 255, .92);
    filter: drop-shadow(0 10px 28px rgba(0, 0, 0, .45));
}

@keyframes bob {

    0%,
    100% {
        transform: translateX(-50%) translateY(0);
    }

    50% {
        transform: translateX(-50%) translateY(-10px);
    }
}

@media (orientation:portrait) {
    .controls {
        bottom: 140px;
    }

    .arrow {
        bottom: 18px;
    }
}

/* =========================
   STORY (sticky zones + backgrounds)
========================= */
.story {
    position: relative;
    background: var(--bg);
    margin-top: -1px;
}

.story__sticky {
    position: sticky;
    top: 0;
    height: 100svh;
    height: 100dvh;
    overflow: hidden;
}

.story__bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
    z-index: 1;
    isolation: isolate;
}

.story__bgLayer {
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity 1.25s ease;
    will-change: opacity, transform;
    transform: translateZ(0);
}

.story__bgLayer.is-on {
    opacity: 1;
}

.story__bgLayer::before,
.story__bgLayer::after {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    opacity: 0;
    transition: opacity 1.25s ease;
    will-change: opacity, transform;
    mix-blend-mode: screen;
    filter: blur(26px);
    transform: translateZ(0);
}

.story__bgLayer.is-on::before,
.story__bgLayer.is-on::after {
    opacity: 1;
}

/* background palettes */
.story__bgLayer.bg-2,
.story__bgLayer.bg-4 {
    background: linear-gradient(180deg, #9AAEA6 0%, #B7C6BF 78%, #D3DFDA 100%);
}

.story__bgLayer.bg-1,
.story__bgLayer.bg-3 {
    background: linear-gradient(180deg, #05070D 0%, #060A10 55%, #07080C 100%);
}

/* light glows */
.story__bgLayer.bg-2::before,
.story__bgLayer.bg-4::before {
    background:
        radial-gradient(420px 260px at 62% 20%,
            rgba(255, 255, 255, .92) 0%,
            rgba(255, 255, 255, .55) 28%,
            rgba(255, 255, 255, .18) 52%,
            transparent 72%),
        radial-gradient(1100px 760px at 28% 68%,
            rgba(255, 255, 255, .22) 0%,
            rgba(255, 255, 255, .10) 40%,
            transparent 72%);
    opacity: 1;
    filter: blur(54px);
}

.story__bgLayer.bg-2::after,
.story__bgLayer.bg-4::after {
    background: radial-gradient(900px 620px at 88% 22%,
            rgba(120, 255, 210, .16) 0%,
            rgba(120, 255, 210, .06) 52%,
            transparent 78%);
    opacity: 1;
    filter: blur(18px);
}

/* dark glows */
.story__bgLayer.bg-1::before,
.story__bgLayer.bg-3::before {
    background:
        radial-gradient(980px 720px at 92% 18%,
            rgba(120, 255, 210, .14) 0%,
            rgba(120, 255, 210, .07) 42%,
            transparent 78%),
        radial-gradient(1600px 1100px at 100% 0%,
            rgba(120, 255, 210, .05) 0%,
            transparent 70%),
        radial-gradient(1200px 900px at 14% 86%,
            rgba(120, 255, 210, .06) 0%,
            transparent 72%);
}

.story__bgLayer.bg-1::after,
.story__bgLayer.bg-3::after {
    background: radial-gradient(700px 520px at 82% 32%,
            rgba(255, 255, 255, .06) 0%,
            transparent 72%);
    filter: blur(26px);
    opacity: .9;
}

.story__flash {
    position: absolute;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    opacity: 0;
    background: linear-gradient(180deg, rgba(255, 255, 255, .18), rgba(255, 255, 255, 0) 40%);
    transition: opacity .18s ease;
}

.story__flash.on {
    opacity: .9;
}

.story__copy {
    position: relative;
    z-index: 3;
    height: 100%;
    max-width: var(--max);
    margin: 0 auto;
    padding: clamp(42px, 7vh, 84px) 18px;
    display: flex;
    align-items: center;
}

/* =========================
   STEP (text + micro lines)
========================= */
.step {
    position: absolute;
    left: 18px;
    right: 18px;

    opacity: 0;
    transform: translateY(44px) scale(.985);
    filter: blur(6px);

    transition:
        opacity .6s ease,
        transform 1s cubic-bezier(.18, .9, .18, 1),
        filter .9s ease;

    pointer-events: none;
    will-change: opacity, transform, filter;
}

.step.is-active {
    opacity: 1;
    transform: translateY(0) scale(1);
    filter: blur(0);
    pointer-events: auto;
}

.step h2 {
    margin: 0 0 14px;
    font-size: clamp(30px, 4.2vw, 56px);
    line-height: 1.02;
    letter-spacing: -0.03em;
    font-weight: 300;
}

.step p {
    margin: 0;
    max-width: 60ch;
    font-size: clamp(15px, 1.2vw, 18px);
    line-height: 1.65;
    font-weight: 300;
}

.step[data-theme="dark"] h2 {
    color: rgba(238, 240, 255, .96);
}

.step[data-theme="dark"] p {
    color: rgba(238, 240, 255, .82);
}

.step[data-theme="light"] h2 {
    color: rgba(12, 20, 35, .92);
}

.step[data-theme="light"] p {
    color: rgba(12, 20, 35, .72);
}

.step .baseline {
    display: block;
    font-weight: 500;
    letter-spacing: 0.3em;
    font-size: clamp(15px, 1.2vw, 18px);
    line-height: 1.35;
    text-transform: uppercase;
    opacity: .92;
    margin-bottom: .6em;
}

.lines {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.line,
.baseline {
    opacity: 0;
    transform: translateY(14px);
    transition: opacity .55s ease, transform .9s cubic-bezier(.18, .9, .18, 1);
    will-change: opacity, transform;
}

.step.is-active .line,
.step.is-active .baseline {
    opacity: 1;
    transform: translateY(0);
}

.step.is-active .baseline {
    transition-delay: .02s;
}

.step.is-active .line:nth-child(1) {
    transition-delay: .06s;
}

.step.is-active .line:nth-child(2) {
    transition-delay: .14s;
}

.step.is-active .line:nth-child(3) {
    transition-delay: .22s;
}

.step.is-active .line:nth-child(4) {
    transition-delay: .30s;
}

/* =========================
   CTA
========================= */
.story__cta {
    margin-top: 38px;
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.linkbtn {
    display: inline-flex;
    align-items: center;
    justify-content: center;

    padding: 14px 26px;
    border-radius: 20px;

    background: linear-gradient(-90deg,
            rgba(131, 169, 163, .92) 0%,
            rgba(123, 152, 148, .92) 100%);

    color: rgba(255, 255, 255, .92);
    text-decoration: none;

    font-family: var(--font-title);
    font-size: 11.5px;
    font-weight: 400;
    letter-spacing: 1px;
}

.linkbtn:hover {
    transform: translateY(-1px);
    filter: brightness(1.04) saturate(1.03);
}

.linkbtn:active {
    transform: translateY(0);
    filter: brightness(0.99);
}

.linkbtn:focus-visible {
    outline: 2px solid rgba(255, 255, 255, .38);
    outline-offset: 4px;
}

/* =========================
   SCROLL LENGTH + ACCESSIBILITY
========================= */
.story__scroll {
   height: 1px;
}

@media (prefers-reduced-motion: reduce) {
    .arrow {
        animation: none;
    }

    .story__bgLayer,
    .line,
    .step {
        transition: none;
    }
}

@media (max-width: 520px) and (orientation: portrait) {
  
  .hero video {
    object-position: 50% 35%;
  }
}