/* ============================================
   CASE STUDIES — Coverflow Gallery
   Full-screen rotating 3D card carousel.
   Lead card of each project runs the real site
   live; the rest are poster cards that expand
   to a full-screen live view on click.
   Scoped under .csx — uses site brand tokens.
   ============================================ */

.csx {
    position: relative;
    height: 100vh;
    height: 100svh;
    min-height: 620px;
    overflow: hidden;
    isolation: isolate;
    --csx-card-w: clamp(320px, 50vw, 680px);
    --csx-card-h: clamp(400px, 62vh, 660px);
    --csx-nav-h: 61px;
    --card-accent: var(--primary);
    --card-accent-glow: var(--primary-glow);
    background: var(--bg-deep);
}

/* ---------- Ambient background ---------- */
.csx-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
    overflow: hidden;
    pointer-events: none;
}

.csx-glow {
    position: absolute;
    width: 62vw;
    height: 62vw;
    max-width: 900px;
    max-height: 900px;
    border-radius: 50%;
    filter: blur(90px);
    opacity: 0.55;
    transition: background 0.6s ease;
}

.csx-glow--1 {
    background: radial-gradient(circle, var(--card-accent-glow), transparent 70%);
    top: -12%;
    left: -8%;
    animation: csx-drift1 24s ease-in-out infinite alternate;
}

.csx-glow--2 {
    background: radial-gradient(circle, rgba(0, 212, 255, 0.16), transparent 70%);
    bottom: -18%;
    right: -10%;
    animation: csx-drift2 28s ease-in-out infinite alternate;
}

@keyframes csx-drift1 {
    to {
        transform: translate(8%, 10%) scale(1.15);
    }
}

@keyframes csx-drift2 {
    to {
        transform: translate(-10%, -8%) scale(1.1);
    }
}

.csx-grain {
    position: absolute;
    inset: 0;
    opacity: 0.04;
    mix-blend-mode: overlay;
    pointer-events: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ---------- Heading ---------- */
.csx-head {
    position: absolute;
    top: calc(var(--csx-nav-h) + clamp(8px, 2.6vh, 28px));
    left: 0;
    right: 0;
    z-index: 6;
    text-align: center;
    padding: 0 20px;
    pointer-events: none;
}

.csx-eyebrow {
    display: inline-block;
    font-size: 0.72rem;
    letter-spacing: 0.32em;
    text-transform: uppercase;
    color: var(--primary-dim);
    margin-bottom: 10px;
    opacity: 0;
    transform: translateY(12px);
    animation: csx-rise 0.9s var(--ease-premium) 0.1s forwards;
}

.csx-head h1 {
    font-family: var(--font-heading);
    font-size: clamp(1.9rem, 4.6vw, 3.4rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1;
    margin: 0;
    background: linear-gradient(180deg, var(--text-primary), var(--primary-dim));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    opacity: 0;
    transform: translateY(16px);
    animation: csx-rise 1s var(--ease-premium) 0.24s forwards;
}

.csx-sub {
    margin: 8px auto 0;
    max-width: 56ch;
    font-size: clamp(0.82rem, 1.2vw, 0.95rem);
    color: var(--text-muted);
    opacity: 0;
    transform: translateY(16px);
    animation: csx-rise 1s var(--ease-premium) 0.36s forwards;
}

@keyframes csx-rise {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ---------- Stage ---------- */
.csx-stage {
    position: absolute;
    inset: 0;
    z-index: 5;
    display: grid;
    place-items: center;
    padding-top: calc(var(--csx-nav-h) + clamp(148px, 26vh, 230px));
    padding-bottom: clamp(120px, 17vh, 184px);
    box-sizing: border-box;
    perspective: 1700px;
    perspective-origin: 50% 50%;
    cursor: grab;
    touch-action: pan-y;
}

.csx-stage.dragging {
    cursor: grabbing;
}

.csx-ring {
    position: relative;
    width: var(--csx-card-w);
    height: var(--csx-card-h);
    transform-style: preserve-3d;
}

/* ---------- Card ---------- */
.csx-card {
    position: absolute;
    inset: 0;
    width: var(--csx-card-w);
    height: var(--csx-card-h);
    transform-style: preserve-3d;
    transition:
        transform 0.8s var(--ease-premium),
        opacity 0.8s var(--ease-premium),
        filter 0.8s var(--ease-premium);
    will-change: transform, opacity;
}

.csx-card:not(.is-front) {
    cursor: pointer;
}

.csx-card-inner {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    border-radius: 22px;
    overflow: hidden;
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    box-shadow:
        0 30px 80px rgba(0, 0, 0, 0.5),
        inset 0 0 0 1px rgba(255, 255, 255, 0.03);
    transition: box-shadow 0.8s var(--ease-premium);
}

.csx-card.is-front .csx-card-inner {
    box-shadow:
        0 44px 120px var(--card-accent-glow),
        0 30px 80px rgba(0, 0, 0, 0.55),
        inset 0 0 0 1px rgba(255, 255, 255, 0.05);
}

/* device chrome */
.csx-chrome {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 11px 14px;
    background: rgba(0, 0, 0, 0.22);
    border-bottom: 1px solid var(--glass-border);
    flex-shrink: 0;
}

.csx-dots {
    display: flex;
    gap: 6px;
}

.csx-dots span {
    width: 11px;
    height: 11px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.16);
}

.csx-dots span:nth-child(1) { background: #ff5f57; }
.csx-dots span:nth-child(2) { background: #febc2e; }
.csx-dots span:nth-child(3) { background: #28c840; }

.csx-url {
    flex: 1;
    text-align: center;
    font-size: 0.72rem;
    color: var(--text-muted);
    background: rgba(0, 0, 0, 0.22);
    border-radius: 7px;
    padding: 5px 12px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 60%;
    margin: 0 auto;
}

.csx-live-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.6rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--success);
    flex-shrink: 0;
}

.csx-live-pill::before {
    content: "";
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--success);
    box-shadow: 0 0 0 0 rgba(52, 211, 153, 0.55);
    animation: csx-pulse 2s infinite;
}

.csx-live-pill.static {
    color: var(--text-muted);
}

.csx-live-pill.static::before {
    background: var(--text-muted);
    box-shadow: none;
    animation: none;
}

@keyframes csx-pulse {
    0% { box-shadow: 0 0 0 0 rgba(52, 211, 153, 0.55); }
    70% { box-shadow: 0 0 0 8px rgba(52, 211, 153, 0); }
    100% { box-shadow: 0 0 0 0 rgba(52, 211, 153, 0); }
}

/* screen */
.csx-screen {
    position: relative;
    flex: 1;
    overflow: hidden;
    background: var(--bg-surface);
}

.csx-poster {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: top center;
    display: block;
    background: #eef1f5;
}

.csx-frame {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border: 0;
    background: #fff;
    opacity: 0;
    transition: opacity 0.6s ease;
    pointer-events: none;
}

.csx-frame.show {
    opacity: 1;
}

.csx-skeleton {
    position: absolute;
    inset: 0;
    background:
        linear-gradient(100deg, transparent 30%, rgba(255, 255, 255, 0.06) 50%, transparent 70%),
        var(--bg-surface);
    background-size: 220% 100%;
    animation: csx-shimmer 1.4s infinite;
    opacity: 0;
    pointer-events: none;
}

.csx-card.is-front .csx-frame:not(.show) ~ .csx-skeleton {
    opacity: 1;
}

@keyframes csx-shimmer {
    to { background-position: -120% 0; }
}

/* light sweep on the front card */
.csx-sweep {
    position: absolute;
    top: 0;
    left: -60%;
    width: 50%;
    height: 100%;
    background: linear-gradient(100deg, transparent, rgba(255, 255, 255, 0.12), transparent);
    transform: skewX(-18deg);
    opacity: 0;
    pointer-events: none;
}

.csx-card.is-front .csx-sweep {
    animation: csx-sweep 5.5s var(--ease-premium) 0.6s infinite;
}

@keyframes csx-sweep {
    0% { left: -60%; opacity: 0; }
    14% { opacity: 1; }
    32% { left: 120%; opacity: 0; }
    100% { left: 120%; opacity: 0; }
}



/* meta */
.csx-meta {
    padding: 15px 18px 17px;
    flex-shrink: 0;
    background: linear-gradient(180deg, transparent, rgba(0, 0, 0, 0.14));
}

.csx-cat {
    display: block;
    font-size: 0.64rem;
    font-weight: 600;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--card-accent);
}

.csx-meta h3 {
    font-family: var(--font-heading);
    font-size: clamp(1.05rem, 1.5vw, 1.3rem);
    font-weight: 700;
    letter-spacing: -0.01em;
    margin: 6px 0 10px;
    color: var(--text-primary);
}

.csx-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.csx-tag {
    font-size: 0.66rem;
    padding: 4px 9px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    color: var(--text-body);
}

/* CTA card */
.csx-card.cta .csx-card-inner {
    background:
        radial-gradient(120% 80% at 50% 0%, var(--primary-glow-strong), transparent 62%),
        linear-gradient(180deg, var(--bg-card), var(--bg-surface));
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 40px;
    gap: 6px;
}

.csx-spark {
    width: 62px;
    height: 62px;
    border-radius: 20px;
    display: grid;
    place-items: center;
    background: var(--gradient-primary);
    box-shadow: 0 14px 40px var(--primary-glow-strong);
    margin-bottom: 18px;
    color: #fff;
}

.csx-card.cta h3 {
    font-family: var(--font-heading);
    font-size: clamp(1.5rem, 2.4vw, 1.95rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.1;
    margin: 0 0 12px;
    color: var(--text-primary);
}

.csx-card.cta p {
    color: var(--text-body);
    font-size: 0.95rem;
    line-height: 1.55;
    max-width: 30ch;
    margin: 0 0 24px;
}

/* ---------- Buttons ---------- */
.csx-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font: inherit;
    font-weight: 600;
    font-size: 0.92rem;
    color: #fff;
    background: var(--gradient-primary);
    border: none;
    border-radius: 999px;
    padding: 13px 24px;
    cursor: pointer;
    text-decoration: none;
    box-shadow: 0 10px 30px var(--primary-glow-strong);
    transition: 0.3s var(--ease-premium);
}

.csx-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 16px 42px var(--primary-glow-strong);
}

.csx-btn-ghost {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font: inherit;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-body);
    background: transparent;
    border: 1px solid var(--glass-border);
    border-radius: 999px;
    padding: 12px 22px;
    cursor: pointer;
    transition: 0.3s var(--ease-premium);
}

.csx-btn-ghost:hover {
    color: var(--text-primary);
    border-color: var(--text-muted);
}

/* ---------- Controls ---------- */
.csx-controls {
    position: absolute;
    bottom: clamp(22px, 4vh, 42px);
    left: 0;
    right: 0;
    z-index: 6;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 13px;
    pointer-events: none;
}

.csx-nav-row {
    display: flex;
    align-items: center;
    gap: 22px;
    pointer-events: auto;
}

.csx-nav-btn {
    width: 46px;
    height: 46px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    cursor: pointer;
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    transition: 0.3s var(--ease-premium);
}

.csx-nav-btn:hover {
    transform: translateY(-2px);
    border-color: var(--card-accent);
    color: var(--card-accent);
}

.csx-counter {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    min-width: 96px;
    text-align: center;
    letter-spacing: 0.06em;
    font-variant-numeric: tabular-nums;
}

.csx-counter .sep,
.csx-counter .total {
    color: var(--text-muted);
    font-weight: 500;
}

.csx-hint {
    font-size: 0.74rem;
    color: var(--text-muted);
    letter-spacing: 0.01em;
}



/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
    .csx-card,
    .csx-glow,
    .csx-sweep,
    .csx-skeleton,
    .csx-eyebrow,
    .csx-head h1,
    .csx-sub,
    .csx-ov-stage,
    .csx-ov-panel {
        animation: none !important;
        transition: none !important;
    }

    .csx-eyebrow,
    .csx-head h1,
    .csx-sub {
        opacity: 1;
        transform: none;
    }
}

/* ---------- Responsive ---------- */
@media (max-width: 880px) {
    .csx-ov-grid {
        grid-template-columns: 1fr;
        grid-template-rows: 1fr auto;
    }

    .csx-ov-stage {
        margin: 14px 14px 0;
    }

    .csx-ov-panel {
        align-self: start;
        padding: 22px 22px 28px;
        max-height: 42vh;
    }

    .csx-ov-metrics {
        gap: 18px;
    }
}

@media (max-width: 600px) {
    .csx {
        --csx-card-w: clamp(260px, 88vw, 400px);
        --csx-card-h: clamp(360px, 56vh, 520px);
    }

    .csx-hint {
        display: none;
    }

    .csx-nav-row {
        gap: 16px;
    }
}