/* Case Study Page Styles */

/* Reuse base variables from parent */
:root {
    --color-bg: #ffffff;
    --color-ink: #0a0a0a;
    --color-ink-secondary: #555;
    --color-ink-muted: #999;
    --color-accent: #D14950;
    --color-accent-hover: #b93e45;
    --color-blue: #1C5CFC;
    --color-border: rgba(10, 10, 10, 0.08);
    --font-display: 'Inter', sans-serif;
    --font-body: 'Inter', sans-serif;
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

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

html { scroll-behavior: smooth; font-size: 16px; }

body {
    font-family: var(--font-body);
    background: var(--color-bg);
    color: var(--color-ink-secondary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

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

/* Hero */
.cs-hero {
    padding: 8rem 4rem 4rem;
    max-width: 900px;
}

.cs-breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.72rem;
    color: var(--color-ink-muted);
    margin-bottom: 2rem;
    letter-spacing: 0.03em;
}

.cs-breadcrumb a {
    color: var(--color-ink-muted);
    transition: color 0.3s ease;
}

.cs-breadcrumb a:hover { color: var(--color-accent); }

.cs-breadcrumb .sep { color: var(--color-border); }

.cs-client {
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 1rem;
}

.cs-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4.5vw, 3.2rem);
    font-weight: 800;
    color: var(--color-ink);
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 1.5rem;
}

.cs-tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.cs-tag {
    font-family: var(--font-display);
    font-size: 0.6rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    color: var(--color-ink-muted);
    padding: 0.3rem 0.6rem;
    border: 1px solid var(--color-border);
    border-radius: 3px;
}

.cs-tag.google, .cs-also-read-tag.google {
    background: #fff;
    color: #111;
    border-color: #ccc;
}

/* Stats strip */
.cs-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1px;
    padding: 0;
    background: transparent;
    border-radius: 0;
    margin: 0 4rem 4rem;
    border: none;
    box-shadow: none;
    position: relative;
    overflow: visible;
}

.cs-stats::before {
    display: none;
}

.cs-stat-item {
    text-align: left;
    padding: 0.75rem 1.25rem;
    position: relative;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    background: #fff;
    transition: border-color 0.3s ease;
}

.cs-stat-item:hover {
    border-color: rgba(10,10,10,0.2);
}

.cs-stat-item:not(:last-child)::after {
    display: none;
}

.cs-stat-value {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 900;
    color: var(--color-ink);
    letter-spacing: -0.04em;
    line-height: 1;
    text-shadow: none;
}

.cs-stat-value .unit {
    color: var(--color-accent);
    font-size: 0.95rem;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.cs-stat-label {
    font-size: 0.68rem;
    color: var(--color-ink-muted);
    margin-top: 0.25rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    font-weight: 600;
}

/* Content sections */
.cs-content {
    max-width: 740px;
    padding: 0 4rem 4rem;
}

.cs-section {
    margin-bottom: 3rem;
}

.cs-section-label {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 1rem;
}

.cs-section-label .line {
    width: 24px;
    height: 1px;
    background: var(--color-accent);
}

.cs-section h3 {
    font-family: var(--font-display);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--color-ink);
    margin-bottom: 1rem;
    letter-spacing: -0.01em;
    line-height: 1.3;
}

.cs-section p {
    font-size: 0.95rem;
    line-height: 1.85;
    font-weight: 300;
    color: var(--color-ink-secondary);
    margin-bottom: 1rem;
}

.cs-section p:last-child {
    margin-bottom: 0;
}

/* Highlights list */
.cs-highlights {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    margin-top: 1rem;
}

.cs-highlights li {
    font-size: 0.88rem;
    color: var(--color-ink-secondary);
    font-weight: 400;
    padding-left: 1.4rem;
    position: relative;
    line-height: 1.6;
}

.cs-highlights li::before {
    content: '\2192';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: 600;
}

/* Campaign Creative / Gallery */
.cs-creative {
    padding: 0 4rem 4rem;
    max-width: 900px;
}

.cs-creative h3 {
    font-family: var(--font-display);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--color-ink);
    margin-bottom: 1.5rem;
    letter-spacing: -0.01em;
    line-height: 1.3;
}

.cs-gallery {
    display: grid;
    gap: 1rem;
}

.cs-gallery-item {
    border-radius: 12px;
    overflow: hidden;
    background: #f5f5f5;
}

.cs-gallery-item img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 12px;
}

.cs-gallery-caption {
    font-size: 0.78rem;
    color: var(--color-ink-muted);
    font-weight: 400;
    line-height: 1.6;
    margin-top: 1rem;
    font-style: italic;
}

/* Creative Slider */
.cs-slider {
    position: relative;
}

.cs-slider-track {
    display: flex;
    gap: 1rem;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    cursor: grab;
    padding-bottom: 0.5rem;
}

.cs-slider-track::-webkit-scrollbar { display: none; }

.cs-slider-card {
    flex: 0 0 200px;
    scroll-snap-align: start;
    background: #f5f5f5;
    border-radius: 10px;
    overflow: hidden;
    transition: transform 0.3s ease;
}

.cs-slider-card:hover {
    transform: translateY(-3px);
}

.cs-slider-card img {
    width: 100%;
    height: auto;
    object-fit: contain;
    display: block;
}

.cs-slider-label {
    display: block;
    font-size: 0.68rem;
    font-weight: 500;
    color: var(--color-ink-muted);
    padding: 0.6rem 0.8rem;
    letter-spacing: 0.02em;
}

.cs-slider-nav {
    display: flex;
    gap: 0.6rem;
    margin-top: 1rem;
}

.cs-slider-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1px solid var(--color-border);
    background: #fff;
    color: var(--color-ink);
    font-size: 0.9rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.cs-slider-btn:hover {
    background: var(--color-ink);
    color: #fff;
    border-color: var(--color-ink);
}

/* CTA footer */
.cs-footer {
    padding: 4rem;
    border-top: 1px solid var(--color-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 2rem;
}

.cs-footer-text {
    max-width: 400px;
}

.cs-footer-text h3 {
    font-family: var(--font-display);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--color-ink);
    margin-bottom: 0.5rem;
}

.cs-footer-text p {
    font-size: 0.88rem;
    color: var(--color-ink-secondary);
    font-weight: 300;
}

.cs-cta {
    display: inline-flex;
    align-items: center;
    gap: 0.8rem;
    padding: 1rem 2rem;
    background: var(--color-accent);
    color: #fff;
    font-family: var(--font-display);
    font-size: 0.82rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    border-radius: 4px;
    transition: background 0.3s ease;
}

.cs-cta:hover {
    background: var(--color-accent-hover);
}

/* More case studies link */
.cs-more {
    padding: 3rem 4rem 5rem;
    text-align: center;
}

.cs-more a {
    display: inline-flex;
    align-items: center;
    gap: 0.8rem;
    font-family: var(--font-display);
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--color-accent);
    transition: gap 0.3s var(--ease-out);
}

.cs-more a:hover { gap: 1.2rem; }

/* Also Read */
.cs-also-read {
    padding: 4rem 4rem 5rem;
    border-top: 1px solid var(--color-border);
}

.cs-also-read-heading {
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-ink-muted);
    margin-bottom: 2rem;
}

.cs-also-read-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.cs-also-read-card {
    display: block;
    border: 1px solid var(--color-border);
    border-radius: 10px;
    padding: 1.75rem;
    transition: border-color 0.3s ease, transform 0.3s ease;
    color: inherit;
}

.cs-also-read-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-3px);
}

.cs-also-read-client {
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 0.6rem;
}

.cs-also-read-title {
    font-family: var(--font-display);
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--color-ink);
    line-height: 1.35;
    margin-bottom: 1rem;
    letter-spacing: -0.01em;
}

.cs-also-read-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-bottom: 1.25rem;
}

.cs-also-read-tag {
    font-size: 0.58rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: var(--color-ink-muted);
    padding: 0.2rem 0.5rem;
    border: 1px solid var(--color-border);
    border-radius: 3px;
}

.cs-also-read-cta {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-accent);
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    transition: gap 0.3s ease;
}

.cs-also-read-card:hover .cs-also-read-cta {
    gap: 0.7rem;
}

/* Responsive */
@media (max-width: 900px) {
    .cs-hero { padding: 7rem 2.5rem 3rem; max-width: 100%; }
    .cs-stats { margin: 0 2.5rem 3rem; padding: 2.5rem 2rem; }
    .cs-content { padding: 0 2.5rem 3rem; }
    .cs-creative { padding: 0 2.5rem 3rem; }
    .cs-footer { padding: 3rem 2.5rem; }
    .cs-more { padding: 2rem 2.5rem 4rem; }
    .cs-also-read { padding: 3rem 2.5rem 4rem; }
}

@media (max-width: 768px) {
    .cs-hero { padding: 7rem 1.5rem 2.5rem; }
    .cs-stats {
        margin: 0 1.5rem 2.5rem;
        grid-template-columns: repeat(2, 1fr);
        gap: 0.75rem;
    }
    .cs-stat-item { padding: 1.5rem 1.25rem; }
    .cs-stat-value { font-size: 2.6rem; }
    .cs-stat-value .unit { font-size: 1.1rem; }
    .cs-content { padding: 0 1.5rem 2.5rem; max-width: 100%; }
    .cs-section h3 { font-size: 1.2rem; }
    .cs-footer { padding: 2.5rem 1.5rem; flex-direction: column; text-align: center; }
    .cs-footer-text { max-width: 100%; }
    .cs-more { padding: 1.5rem 1.5rem 3rem; }
    .cs-creative { padding: 0 1.5rem 2.5rem; max-width: 100%; }
    .cs-also-read { padding: 2.5rem 1.5rem 3.5rem; }
    .cs-also-read-grid { grid-template-columns: 1fr 1fr; gap: 1rem; }
    .cs-also-read-card { padding: 1.25rem; }
    .cs-title { font-size: clamp(1.8rem, 6vw, 2.6rem); }
    .cs-slider-card { flex: 0 0 160px; }
    .cs-slider-card img { height: auto; }
}

@media (max-width: 600px) {
    .cs-hero { padding: 6rem 1.2rem 2rem; }
    .cs-stats {
        margin: 0 1.2rem 2rem;
        grid-template-columns: repeat(2, 1fr);
        gap: 0.6rem;
    }
    .cs-stat-value { font-size: 2.2rem; }
    .cs-stat-value .unit { font-size: 1rem; }
    .cs-content { padding: 0 1.2rem 2rem; }
    .cs-creative { padding: 0 1.2rem 2rem; }
    .cs-footer { padding: 2rem 1.2rem; gap: 1.5rem; }
    .cs-more { padding: 1.2rem 1.2rem 2.5rem; }
    .cs-also-read { padding: 2rem 1.2rem 3rem; }
    .cs-also-read-grid { grid-template-columns: 1fr; gap: 0.85rem; }
    .cs-also-read-card { padding: 1.1rem; }
    .cs-also-read-title { font-size: 0.88rem; }
    .cs-title { font-size: clamp(1.6rem, 7vw, 2.4rem); }
    .cs-breadcrumb { margin-bottom: 1.25rem; }
    .cs-tags { gap: 0.35rem; }
    .cs-slider-card { flex: 0 0 140px; }
    .cs-slider-card img { height: auto; }
}