/*
 * landing/css/story.css
 *
 * "How it works" story — 7 scenes, each a full 100vh slide with one
 * screenshot and a short caption. Screenshots alternate: scene 1 has
 * the shot on the RIGHT, scene 2 on the LEFT, and so on.
 *
 * The screenshot is the hero of each scene. Desktop grid is 1fr : 2fr
 * so the shot gets twice as much horizontal space as the caption.
 * Each scene has its own tilt angle so the page feels like a stack
 * of polaroids thrown onto a table, not a spreadsheet of rectangles.
 *
 * Also defines:
 *   - gif-tilt transition block that bridges hero -> story
 *   - mid-story CTA block that sits after scene 7
 */

/* ─── Shared section shell ────────────────────────────────────── */
.scene {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 4rem 2rem;
    z-index: 1;
}

.scene-inner {
    width: 100%;
    max-width: 1800px;
    display: grid;
    /* Default: caption LEFT (1fr), shot RIGHT (2fr) — this is scene 1. */
    grid-template-columns: 1fr 2fr;
    align-items: center;
    gap: 5rem;
    position: relative;
    z-index: 1;
}

/* HTML order is caption-first, shot-second. That puts the shot on
   the RIGHT by default (first scene). Even-numbered scenes flip the
   order so the shot lands on the LEFT — and the grid ratio flips to
   keep the shot in the big column. */
.scene .scene-caption { order: 1; }
.scene .scene-shot    { order: 2; }

.scene:nth-child(even of .scene) .scene-caption { order: 2; }
.scene:nth-child(even of .scene) .scene-shot    { order: 1; }
.scene:nth-child(even of .scene) .scene-inner   { grid-template-columns: 2fr 1fr; }

/* ─── Screenshot frame ────────────────────────────────────────── */
.scene-shot {
    position: relative;
}

.scene-shot img {
    display: block;
    width: 100%;
    height: auto;
    border-radius: 18px;
    border: 1px solid rgba(var(--purple-1), 0.25);
    box-shadow:
        0 4px 20px rgba(0, 0, 0, 0.4),
        0 30px 80px rgba(var(--purple-1), 0.3),
        0 0 0 1px rgba(255, 255, 255, 0.04);
    transition: transform 0.9s cubic-bezier(0.22, 1, 0.36, 1),
                opacity 0.9s cubic-bezier(0.22, 1, 0.36, 1);
    will-change: transform;
    opacity: 0;
}

/* Per-scene tilt — hand-picked angles. Each scene reads slightly
   different; together they feel organic, not uniform. */
.scene:nth-of-type(1) .scene-shot img { transform: translateX(60px)  rotate(-2deg); }
.scene:nth-of-type(2) .scene-shot img { transform: translateX(-60px) rotate(3deg);  }
.scene:nth-of-type(3) .scene-shot img { transform: translateX(60px)  rotate(-4deg); }
.scene:nth-of-type(4) .scene-shot img { transform: translateX(-60px) rotate(2deg);  }
.scene:nth-of-type(5) .scene-shot img { transform: translateX(60px)  rotate(-3deg); }
.scene:nth-of-type(6) .scene-shot img { transform: translateX(-60px) rotate(2.5deg); }
.scene:nth-of-type(7) .scene-shot img { transform: translateX(60px)  rotate(0deg);  }

.scene.in-view:nth-of-type(1) .scene-shot img { transform: translateX(0) rotate(-2deg);  opacity: 1; }
.scene.in-view:nth-of-type(2) .scene-shot img { transform: translateX(0) rotate(3deg);   opacity: 1; }
.scene.in-view:nth-of-type(3) .scene-shot img { transform: translateX(0) rotate(-4deg);  opacity: 1; }
.scene.in-view:nth-of-type(4) .scene-shot img { transform: translateX(0) rotate(2deg);   opacity: 1; }
.scene.in-view:nth-of-type(5) .scene-shot img { transform: translateX(0) rotate(-3deg);  opacity: 1; }
.scene.in-view:nth-of-type(6) .scene-shot img { transform: translateX(0) rotate(2.5deg); opacity: 1; }
.scene.in-view:nth-of-type(7) .scene-shot img { transform: translateX(0) rotate(0deg);   opacity: 1; }

/* ─── Caption ─────────────────────────────────────────────────── */
.scene-caption {
    padding: 0 1rem;
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.9s cubic-bezier(0.22, 1, 0.36, 1) 0.15s,
                transform 0.9s cubic-bezier(0.22, 1, 0.36, 1) 0.15s;
}

.scene.in-view .scene-caption {
    opacity: 1;
    transform: translateY(0);
}

.scene-step {
    display: inline-block;
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', monospace;
    font-size: 0.75rem;
    color: rgba(var(--purple-3), 1);
    letter-spacing: 0.15em;
    margin-bottom: 1rem;
    opacity: 0.7;
}

.scene-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    letter-spacing: -0.04em;
    line-height: 1;
    margin-bottom: 1.25rem;
    color: #ffffff;
}

.scene-title .accent {
    background: linear-gradient(135deg,
        rgba(var(--purple-3), 1),
        rgba(var(--purple-1), 1));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.scene-description {
    font-size: 1.0625rem;
    color: rgba(255, 255, 255, 0.65);
    line-height: 1.7;
    max-width: 440px;
}

/* ─── Gif tilt transition — the bridge from hero to story ────── */
/*
 * The bridge overlaps the bottom of the hero by a third of its own
 * height. Negative top margin (equal to 1/3 of min-height) pulls the
 * whole section up; z-index keeps it above the hero so the frame is
 * never clipped. The hero's scroll indicator sits behind the frame
 * as a result — intended: once the user starts scrolling they are
 * visually bridged straight into the demo.
 */
.gif-bridge {
    position: relative;
    min-height: 90vh;
    margin-top: calc(-30vh + 40px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    perspective: 1400px;
    z-index: 2;
}

/*
 * Two-layer frame:
 *   .gif-bridge-wrap   — owns the entrance fade/slide (once gif
 *                        finishes decoding, JS adds .loaded and it
 *                        animates from translateY(40px) + opacity 0
 *                        up into place).
 *   .gif-bridge-frame  — owns the scroll-scrubbed rotateX tilt.
 * Separation avoids the two transforms fighting for the same property.
 */
.gif-bridge-frame {
    width: 100%;
    max-width: 1100px;
    position: relative;
    transform-origin: center center;
    /* rotateX angle driven at runtime by gif-tilt.js as the user
       scrolls — here we just give a sensible starting value. */
    transform: rotateX(-22deg) translateZ(-40px);
    transition: transform 40ms linear;
}

.gif-bridge-frame img {
    display: block;
    width: 100%;
    height: auto;
    border-radius: 20px;
    border: 1px solid rgba(var(--purple-1), 0.3);
    box-shadow:
        0 10px 40px rgba(0, 0, 0, 0.5),
        0 40px 120px rgba(var(--purple-1), 0.35),
        0 0 0 1px rgba(255, 255, 255, 0.04);
    /* Loading state — gif is invisible and pushed down while the
       network fetches. The .loaded class (added by JS once the gif
       has actually decoded) rides it back into place with a single
       graceful motion, so the user never sees a broken square. */
    opacity: 0;
    transform: translateY(30px);
    transition:
        opacity   900ms cubic-bezier(0.22, 1, 0.36, 1),
        transform 900ms cubic-bezier(0.22, 1, 0.36, 1);
}

.gif-bridge-frame img.loaded {
    opacity: 1;
    transform: translateY(0);
}

/* Skeleton shimmer shown while the gif is still downloading. Sits
   beneath the <img> and fades out once the image has loaded. */
.gif-bridge-frame::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 20px;
    background:
        linear-gradient(100deg,
            rgba(var(--purple-1), 0.05) 0%,
            rgba(var(--purple-1), 0.18) 40%,
            rgba(var(--purple-1), 0.05) 80%);
    background-size: 200% 100%;
    animation: gifShimmer 1.6s ease-in-out infinite;
    opacity: 1;
    transition: opacity 500ms ease 300ms;
    pointer-events: none;
    z-index: 0;
}

.gif-bridge-frame.loaded::before {
    opacity: 0;
}

@keyframes gifShimmer {
    0%   { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.gif-bridge-caption {
    position: absolute;
    bottom: -3rem;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.5);
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

/* ─── Mid-story CTA — sits after scene 7 ──────────────────────── */
.mid-cta {
    position: relative;
    padding: 6rem 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2.5rem;
    z-index: 1;
}

.mid-cta-heading {
    font-size: clamp(1.5rem, 3vw, 2.25rem);
    font-weight: 600;
    letter-spacing: -0.02em;
    color: #ffffff;
    text-align: center;
    max-width: 640px;
    line-height: 1.3;
}

.mid-cta-heading .accent {
    background: linear-gradient(135deg,
        rgba(var(--purple-4), 1),
        rgba(var(--purple-1), 1));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.mid-cta-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
}

.btn-cta {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 1.75rem;
    border-radius: 999px;
    font-size: 0.9375rem;
    font-weight: 600;
    font-family: inherit;
    text-decoration: none;
    cursor: pointer;
    border: 1px solid transparent;
    transition: transform 150ms ease, background 150ms ease,
                border-color 150ms ease, box-shadow 150ms ease;
}

.btn-cta svg { width: 16px; height: 16px; }

.btn-cta-primary {
    background: linear-gradient(135deg,
        rgba(var(--purple-1), 1),
        rgba(var(--purple-2), 1));
    color: #ffffff;
    box-shadow: 0 10px 30px rgba(var(--purple-1), 0.4);
}

.btn-cta-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 16px 40px rgba(var(--purple-1), 0.55);
}

.btn-cta-primary:active { transform: translateY(0); }

.btn-cta-outline {
    background: rgba(255, 255, 255, 0.04);
    color: #ffffff;
    border-color: rgba(var(--purple-1), 0.35);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.btn-cta-outline:hover {
    background: rgba(var(--purple-1), 0.12);
    border-color: rgba(var(--purple-1), 0.55);
    transform: translateY(-2px);
}

.btn-cta-outline:active { transform: translateY(0); }

/* ─── Mobile story layout ─────────────────────────────────────── */
@media (max-width: 900px) {
    .scene { padding: 3rem 1.25rem; }

    .scene-inner,
    .scene:nth-child(even of .scene) .scene-inner {
        grid-template-columns: 1fr;
        gap: 2rem;
        justify-items: center;
    }

    /* On mobile always: image on top, caption below */
    .scene .scene-shot,
    .scene:nth-child(even of .scene) .scene-shot    { order: 1; }
    .scene .scene-caption,
    .scene:nth-child(even of .scene) .scene-caption { order: 2; }

    .scene-caption {
        text-align: center;
        padding: 0;
    }

    .scene-description { margin: 0 auto; }

    .scene-shot { margin: 0 auto; max-width: 100%; }

    /* Softer tilt angles on mobile so rotated images don't eat
       the narrow viewport. */
    .scene:nth-of-type(1) .scene-shot img,
    .scene.in-view:nth-of-type(1) .scene-shot img { transform: translateX(0) rotate(-1.5deg); }
    .scene:nth-of-type(2) .scene-shot img,
    .scene.in-view:nth-of-type(2) .scene-shot img { transform: translateX(0) rotate(1.5deg); }
    .scene:nth-of-type(3) .scene-shot img,
    .scene.in-view:nth-of-type(3) .scene-shot img { transform: translateX(0) rotate(-2deg); }
    .scene:nth-of-type(4) .scene-shot img,
    .scene.in-view:nth-of-type(4) .scene-shot img { transform: translateX(0) rotate(1deg); }
    .scene:nth-of-type(5) .scene-shot img,
    .scene.in-view:nth-of-type(5) .scene-shot img { transform: translateX(0) rotate(-1.5deg); }
    .scene:nth-of-type(6) .scene-shot img,
    .scene.in-view:nth-of-type(6) .scene-shot img { transform: translateX(0) rotate(1.5deg); }
    .scene:nth-of-type(7) .scene-shot img,
    .scene.in-view:nth-of-type(7) .scene-shot img { transform: translateX(0) rotate(0deg); }

    /* Off-screen start state — smaller slide distance for mobile. */
    .scene:not(.in-view):nth-of-type(odd) .scene-shot img  { transform: translateX(20px)  rotate(-2deg); }
    .scene:not(.in-view):nth-of-type(even) .scene-shot img { transform: translateX(-20px) rotate(2deg); }

    /* Mobile gif — 60px wider than the gif-bridge padding allows,
       bleeds 30px past each edge so the frame feels noticeably
       bigger on a phone while staying centered. */
    .gif-bridge { min-height: 60vh; overflow: visible; }
    .gif-bridge-frame {
        width: calc(100% + 60px);
        max-width: calc(100% + 60px);
        margin-left: -30px;
        margin-right: -30px;
        transform: rotateX(-15deg) translateZ(-20px);
    }
    .gif-bridge-frame img { border-radius: 16px; }
    .gif-bridge-caption { font-size: 0.75rem; bottom: -2.25rem; }
    .mid-cta { padding: 4rem 1.25rem; gap: 2rem; }
}

@media (max-width: 480px) {
    .mid-cta-actions { flex-direction: column; width: 100%; }
    .btn-cta { width: 100%; justify-content: center; }
}