/* ============================================================
   Precision Silver — Case Study / Project Detail Styles
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Inter+Tight:wght@400;700&display=swap');

/* ── Tokens (inherited subset) ────────────────────────────── */
:root {
    --bg: #0F0F0F;
    --bg-raised: #141414;
    --surface: #1C1C1C;
    --surface-hi: #242424;
    --border: rgba(192, 192, 192, 0.15);
    --border-hi: rgba(192, 192, 192, 0.35);
    --accent: #C0C0C0;
    --accent-hi: #E5E5E5;
    --text: #E5E5E5;
    --text-muted: #777;
    --text-faint: #3A3A3A;
    --tag-bg: rgba(192, 192, 192, 0.08);
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 24px;
    --radius-pill: 999px;
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --dur: 0.3s;
}

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

html {
    scroll-behavior: smooth;
}

body {
    background: var(--bg);
    color: var(--text);
    font-family: 'Inter', -apple-system, sans-serif;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    display: block;
    max-width: 100%;
}

/* ── Detail Nav (simplified) ──────────────────────────────── */
.detail-nav {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 100;
    width: min(720px, calc(100vw - 40px));
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 56px;
    padding: 0 24px;
    border-radius: var(--radius-pill);
    border: 1px solid var(--border-hi);
    background: rgba(15, 15, 15, 0.72);
    backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.6), inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

.back-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-muted);
    transition: color var(--dur);
}

.back-btn:hover {
    color: var(--accent-hi);
}

.back-btn svg {
    transition: transform var(--dur) var(--ease-out);
}

.back-btn:hover svg {
    transform: translateX(-3px);
}

.nav-logo {
    font-family: 'Inter Tight', sans-serif;
    font-weight: 700;
    font-size: 1rem;
    letter-spacing: -0.02em;
    color: var(--accent-hi);
}

/* ── Case Study Hero ──────────────────────────────────────── */
.case-hero {
    min-height: 70vh;
    padding: 160px 7vw 80px;
    border-bottom: 1px solid var(--border);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
}

.case-hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(var(--border) 1px, transparent 1px),
        linear-gradient(90deg, var(--border) 1px, transparent 1px);
    background-size: 80px 80px;
    opacity: 0.4;
    pointer-events: none;
}

.case-category-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    border-radius: var(--radius-pill);
    border: 1px solid var(--border);
    background: var(--tag-bg);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 24px;
    width: fit-content;
}

.case-title {
    font-family: 'Inter Tight', sans-serif;
    font-size: clamp(2.5rem, 6vw, 5.5rem);
    font-weight: 700;
    letter-spacing: -0.04em;
    line-height: 0.95;
    color: var(--accent-hi);
    margin-bottom: 28px;
}

.case-meta-row {
    display: flex;
    gap: 40px;
    flex-wrap: wrap;
}

.case-meta-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.case-meta-label {
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-muted);
}

.case-meta-value {
    font-size: 0.9375rem;
    color: var(--accent-hi);
    font-weight: 500;
}

/* ── Hero Image ───────────────────────────────────────────── */
.case-image-section {
    padding: 0 7vw;
}

.case-image-wrap {
    margin-top: -60px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border);
    background: var(--surface);
    aspect-ratio: 16/7;
}

.case-image-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.case-image-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--surface) 0%, #111 50%, var(--bg-raised) 100%);
}

.placeholder-center svg {
    opacity: 0.15;
}

/* ── Content ──────────────────────────────────────────────── */
.case-content {
    padding: 80px 7vw 120px;
    max-width: 800px;
}

.case-content-label {
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 24px;
}

.case-description {
    font-size: 1.0625rem;
    line-height: 1.85;
    color: var(--text-muted);
}

.case-description p+p {
    margin-top: 1.4em;
}

/* ── Tags ─────────────────────────────────────────────────── */
.case-tags-section {
    padding: 0 7vw 80px;
    border-top: 1px solid var(--border);
    padding-top: 60px;
}

.case-tags-label {
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 20px;
}

.case-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.case-tag {
    padding: 8px 18px;
    border-radius: var(--radius-pill);
    border: 1px solid var(--border);
    background: var(--tag-bg);
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--accent);
    letter-spacing: 0.04em;
}

/* ── Footer / Next project ────────────────────────────────── */
.case-footer {
    border-top: 1px solid var(--border);
    padding: 60px 7vw;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.btn-back-home {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 13px 28px;
    border-radius: var(--radius-pill);
    border: 1px solid var(--border-hi);
    background: transparent;
    color: var(--accent-hi);
    font-size: 0.8125rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    transition: background var(--dur), color var(--dur), transform var(--dur);
}

.btn-back-home:hover {
    background: var(--accent-hi);
    color: var(--bg);
    transform: translateY(-1px);
}

.case-footer-copy {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ── Error / Not Found ────────────────────────────────────── */
.error-section {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 20px;
    text-align: center;
    padding: 40px;
}

.error-code {
    font-family: 'Inter Tight', sans-serif;
    font-size: 6rem;
    font-weight: 700;
    color: var(--text-faint);
    letter-spacing: -0.05em;
}

.error-msg {
    color: var(--text-muted);
    font-size: 1rem;
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 768px) {
    .case-hero {
        padding: 140px 6vw 60px;
    }

    .case-content {
        padding: 60px 6vw 80px;
    }

    .case-tags-section,
    .case-image-section,
    .case-footer {
        padding-left: 6vw;
        padding-right: 6vw;
    }

    .case-footer {
        flex-direction: column;
        align-items: flex-start;
    }
}