/* ============================================
   PROJECT CASE STUDY PAGE STYLES
   ============================================ */

/* --- Hero --- */
.project-hero {
    padding: clamp(8rem, 15vw, 12rem) 0 clamp(3rem, 6vw, 5rem);
    position: relative;
    overflow: hidden;
}

.project-hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.project-hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(13, 148, 136, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(13, 148, 136, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
}

.project-hero-gradient {
    position: absolute;
    width: 500px;
    height: 500px;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.12;
}

.project-hero-gradient.teal {
    background: var(--secondary);
    top: -200px;
    right: -100px;
}

.project-hero-gradient.orange {
    background: var(--accent);
    bottom: -200px;
    left: -100px;
    opacity: 0.06;
}

.project-hero-content {
    position: relative;
    z-index: 1;
}

.project-hero .breadcrumb {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
}

.project-hero .breadcrumb a {
    color: var(--secondary);
    text-decoration: none;
    transition: color 0.3s;
}

.project-hero .breadcrumb a:hover {
    color: var(--secondary-glow);
}

.project-hero .breadcrumb .sep {
    color: var(--text-muted);
}

.project-hero h1 {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 0.75rem;
}

.project-hero .tagline {
    font-size: 1.2rem;
    color: var(--accent);
    font-style: italic;
    margin-bottom: 1.5rem;
}

.project-hero .description {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 680px;
    margin-bottom: 2rem;
}

.project-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
}

.project-meta-item {
    min-width: 0;
    flex: 1 1 180px;
}

.project-meta-label {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 0.35rem;
}

.project-meta-value {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.45;
    overflow-wrap: anywhere;
}

.project-meta-value a {
    color: var(--secondary);
    text-decoration: none;
    transition: color 0.3s;
}

.project-meta-value a:hover {
    color: var(--secondary-glow);
}

.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.25rem 0.75rem;
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 600;
}

.status-badge.live {
    background: rgba(13, 148, 136, 0.12);
    color: var(--secondary-glow);
    border: 1px solid rgba(13, 148, 136, 0.25);
}

.status-badge.dev {
    background: rgba(249, 115, 22, 0.12);
    color: var(--accent);
    border: 1px solid rgba(249, 115, 22, 0.25);
}

.status-badge .dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: currentColor;
}

.case-study-nav-wrap {
    position: sticky;
    top: 76px;
    z-index: 20;
    backdrop-filter: blur(14px);
    background: rgba(7, 15, 28, 0.72);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.case-study-nav {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    padding: 0.95rem 0;
}

.case-study-link {
    display: inline-flex;
    align-items: center;
    padding: 0.5rem 0.85rem;
    border-radius: 999px;
    border: 1px solid transparent;
    color: var(--text-muted);
    text-decoration: none;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    transition: all 0.25s ease;
}

.case-study-link:hover,
.case-study-link.active {
    color: var(--secondary-glow);
    border-color: rgba(13, 148, 136, 0.25);
    background: rgba(13, 148, 136, 0.08);
}

.section--sm[id] {
    scroll-margin-top: 9rem;
}


/* --- Screenshot / Image Placeholders --- */
.screenshot-block {
    margin: 3rem 0;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border);
    background: var(--bg-card);
    cursor: zoom-in;
    transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.screenshot-block:hover {
    transform: translateY(-3px);
    border-color: rgba(13, 148, 136, 0.24);
    box-shadow: 0 18px 48px rgba(0, 0, 0, 0.28);
}

.screenshot-media {
    display: block;
    width: 100%;
    height: auto;
    background: #08111f;
}

.screenshot-placeholder {
    width: 100%;
    aspect-ratio: 16/9;
    background: linear-gradient(135deg, var(--bg-card), var(--primary));
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    gap: 0.75rem;
    font-size: 0.85rem;
}

.screenshot-placeholder svg {
    width: 48px;
    height: 48px;
    opacity: 0.3;
}

.screenshot-caption {
    padding: 0.75rem 1.25rem;
    font-size: 0.8rem;
    color: var(--text-muted);
    border-top: 1px solid var(--border);
    font-family: var(--font-mono);
}

.screenshot-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
    margin: 2rem 0;
}

.lightbox-media > img,
.lightbox-media > video,
.lightbox-media > .screenshot-placeholder {
    display: block;
    width: 100%;
    height: auto;
}

.lightbox-overlay {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    background: rgba(3, 7, 18, 0.88);
}

.lightbox-overlay.open {
    display: flex;
}

.lightbox-dialog {
    width: min(980px, 100%);
    border-radius: 18px;
    overflow: hidden;
    border: 1px solid rgba(148, 163, 184, 0.2);
    background: #091321;
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.45);
}

.lightbox-media {
    width: 100%;
}

.lightbox-caption {
    padding: 1rem 1.25rem;
    color: var(--text-secondary);
    border-top: 1px solid rgba(148, 163, 184, 0.16);
}

.lightbox-close {
    position: absolute;
    top: 1.25rem;
    right: 1.25rem;
    width: 42px;
    height: 42px;
    border: 1px solid rgba(148, 163, 184, 0.25);
    border-radius: 999px;
    background: rgba(15, 23, 42, 0.9);
    color: #fff;
    cursor: pointer;
}

/* --- Prose Content --- */
.prose {
    max-width: 760px;
}

.prose h2 {
    font-family: var(--font-display);
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
    margin-top: 0;
}

.prose h3 {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    margin-top: 2rem;
}

.prose p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    margin-bottom: 1.25rem;
    line-height: 1.8;
}

.prose p strong {
    color: var(--text-primary);
    font-weight: 600;
}

.prose ul, .prose ol {
    color: var(--text-secondary);
    margin-bottom: 1.25rem;
    padding-left: 1.5rem;
}

.prose li {
    margin-bottom: 0.4rem;
    font-size: 1rem;
}

.prose blockquote {
    border-left: 3px solid var(--secondary);
    padding: 1rem 1.5rem;
    margin: 2rem 0;
    background: rgba(13, 148, 136, 0.04);
    border-radius: 0 8px 8px 0;
    color: var(--text-secondary);
    font-style: italic;
}

/* --- Info Cards / Callouts --- */
.callout {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.75rem;
    margin: 2rem 0;
}

.callout.highlight {
    border-left: 3px solid var(--secondary);
}

.callout.warning {
    border-left: 3px solid var(--accent);
}

.callout h4 {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.callout p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin: 0;
}

/* --- Tech Stack Detail --- */
.tech-stack-detail {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1rem;
    margin: 2rem 0;
}

.tech-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 1.25rem;
    transition: all 0.3s ease;
}

.tech-item:hover {
    border-color: var(--border-hover);
    transform: translateY(-2px);
}

.tech-item-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.tech-item-icon {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    flex-shrink: 0;
    color: var(--text-primary);
}

.tech-item-icon svg {
    width: 18px;
    height: 18px;
    stroke: currentColor;
    fill: none;
    stroke-width: 1.8;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.tech-item-icon.teal { background: rgba(13, 148, 136, 0.12); color: var(--secondary-glow); }
.tech-item-icon.orange { background: rgba(249, 115, 22, 0.12); color: var(--accent); }
.tech-item-icon.blue { background: rgba(59, 130, 246, 0.12); color: #60a5fa; }
.tech-item-icon.purple { background: rgba(168, 85, 247, 0.12); color: #a78bfa; }

.tech-item h4 {
    font-family: var(--font-display);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
}

.tech-item p {
    color: var(--text-muted);
    font-size: 0.85rem;
    line-height: 1.5;
}

/* --- Feature Deep Dive --- */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.25rem;
    margin: 2rem 0;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.75rem;
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--secondary), transparent);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.feature-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-3px);
}

.feature-card:hover::before {
    opacity: 1;
}

.feature-card-icon {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    background: rgba(13, 148, 136, 0.08);
    border: 1px solid var(--border);
    color: var(--secondary-glow);
}

.feature-card-icon svg {
    width: 22px;
    height: 22px;
    stroke: currentColor;
    fill: none;
    stroke-width: 1.8;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.feature-card h4 {
    font-family: var(--font-display);
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* --- Architecture Diagram Placeholder --- */
.architecture-block {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 2rem;
    margin: 2rem 0;
    text-align: center;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.architecture-block .label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--secondary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 1rem;
}

.arch-flow {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.7rem;
    flex-wrap: wrap;
}

.arch-node,
.flow-box {
    transition: transform 0.25s ease, opacity 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.architecture-block.is-interactive .arch-node,
.architecture-block.is-interactive .flow-box {
    cursor: pointer;
}

.architecture-block.is-interactive .arch-node.is-dim,
.architecture-block.is-interactive .flow-box.is-dim,
.architecture-block.is-interactive .arch-arrow.is-dim,
.architecture-block.is-interactive .flow-arrow.is-dim {
    opacity: 0.35;
}

.arch-node.is-active,
.flow-box.is-active {
    transform: translateY(-2px);
}

.arch-node {
    padding: 0.6rem 1.2rem;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 8px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-secondary);
    white-space: nowrap;
}

.arch-node.highlight,
.arch-node.is-active {
    border-color: var(--secondary);
    color: var(--secondary-glow);
    background: rgba(13, 148, 136, 0.06);
    box-shadow: 0 10px 28px rgba(13, 148, 136, 0.16);
}

.arch-arrow,
.flow-arrow {
    color: var(--text-muted);
    font-size: 1.1rem;
    transition: opacity 0.25s ease;
}

.arch-flow + .arch-flow {
    margin-top: 0.85rem;
}

.flow-box {
    min-width: 128px;
    padding: 0.7rem 1.1rem;
    border-radius: 12px;
    border: 1px solid var(--border);
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    white-space: nowrap;
}

.flow-box.is-active {
    box-shadow: 0 10px 28px rgba(15, 23, 42, 0.22);
}

.flow-box.source {
    background: rgba(148, 163, 184, 0.12);
    border-color: rgba(148, 163, 184, 0.24);
    color: #cbd5e1;
}

.flow-box.process {
    background: rgba(13, 148, 136, 0.12);
    border-color: rgba(13, 148, 136, 0.32);
    color: var(--secondary-glow);
}

.flow-box.validation {
    background: rgba(249, 115, 22, 0.12);
    border-color: rgba(249, 115, 22, 0.3);
    color: #fdba74;
}

.flow-box.database {
    background: rgba(59, 130, 246, 0.12);
    border-color: rgba(59, 130, 246, 0.3);
    color: #93c5fd;
}

.flow-box.output {
    background: rgba(34, 197, 94, 0.12);
    border-color: rgba(34, 197, 94, 0.28);
    color: #86efac;
}


/* --- Metrics / Stats Row --- */
.metrics-row {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.25rem;
    margin: 2.5rem 0;
}

.metric-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 1.5rem;
    text-align: center;
    min-width: 0;
    min-height: 132px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.metric-value {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    color: var(--secondary-glow);
    line-height: 1.08;
    margin-bottom: 0.45rem;
}

.metric-label {
    font-size: 0.82rem;
    color: var(--text-muted);
    text-transform: none;
    letter-spacing: 0.02em;
    line-height: 1.45;
    overflow-wrap: anywhere;
}

/* --- Challenges & Solutions --- */
.challenge-block {
    margin: 1.5rem 0;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
}

.challenge-header {
    padding: 1.25rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    border-bottom: 1px solid var(--border);
    cursor: pointer;
    transition: background 0.3s;
}

.challenge-header:hover {
    background: rgba(255, 255, 255, 0.02);
}

.challenge-icon {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    flex-shrink: 0;
    color: var(--accent);
}

.challenge-icon svg {
    width: 16px;
    height: 16px;
    stroke: currentColor;
    fill: none;
    stroke-width: 1.8;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.challenge-icon.problem {
    background: rgba(249, 115, 22, 0.12);
    color: var(--accent);
}

.challenge-icon.solution {
    background: rgba(13, 148, 136, 0.12);
    color: var(--secondary-glow);
}

.challenge-header h4 {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.challenge-body {
    padding: 1.25rem 1.5rem;
}

.challenge-body p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 0.75rem;
}

.challenge-body p:last-child {
    margin-bottom: 0;
}

/* --- Code Snippets --- */
.code-block {
    background: #0a0f1a;
    border: 1px solid var(--border);
    border-radius: 10px;
    overflow: hidden;
    margin: 1.5rem 0;
}

.code-block-header {
    padding: 0.6rem 1rem;
    background: rgba(255, 255, 255, 0.02);
    border-bottom: 1px solid var(--border);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.code-block-header .dots {
    display: flex;
    gap: 4px;
}

.code-block-header .dots span {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text-muted);
    opacity: 0.3;
}

.code-block pre {
    padding: 1.25rem;
    overflow-x: auto;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    line-height: 1.6;
    color: var(--text-secondary);
}

.code-block .keyword { color: #c792ea; }
.code-block .string { color: #c3e88d; }
.code-block .comment { color: #546e7a; }
.code-block .function { color: #82aaff; }
.code-block .number { color: #f78c6c; }

/* --- Project Navigation (Prev/Next) --- */
.project-nav {
    border-top: 1px solid var(--border);
    padding: 3rem 0;
}

.project-nav-inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.project-nav-link {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem;
    text-decoration: none;
    transition: all 0.3s ease;
}

.project-nav-link:hover {
    border-color: var(--border-hover);
    transform: translateY(-2px);
}

.project-nav-link.next {
    text-align: right;
}

.project-nav-direction {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--secondary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 0.5rem;
}

.project-nav-title {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* --- Dividers --- */
.divider {
    height: 1px;
    background: var(--border);
    margin: 3rem 0;
}

/* --- Responsive --- */
@media (max-width: 768px) {
    .project-meta {
        gap: 1.25rem;
    }

    .case-study-nav-wrap {
        top: 68px;
    }

    .case-study-nav {
        gap: 0.5rem;
        padding: 0.8rem 0;
    }

    .tech-stack-detail {
        grid-template-columns: 1fr;
    }

    .feature-grid {
        grid-template-columns: 1fr;
    }

    .screenshot-grid {
        grid-template-columns: 1fr;
    }

    .arch-flow {
        flex-direction: column;
    }

    .project-nav-inner {
        grid-template-columns: 1fr;
    }

    .project-nav-link.next {
        text-align: left;
    }

    .metrics-row {
        grid-template-columns: 1fr;
    }

    .metric-card {
        min-height: 0;
    }
}

@media (max-width: 480px) {
    .case-study-link {
        width: 100%;
        justify-content: center;
    }

    .lightbox-overlay {
        padding: 1rem;
    }
}