/* ============================================================
   Code Brilliance - case study pages
   ============================================================ */

:root {
    --cb-black: #05080e;
    --cb-ink: #e8eef5;
    --cb-muted: #9fb0c3;
    --cb-cyan: #14ecd5;
    --cb-blue: #0d47a1;
    --cb-line: rgba(255, 255, 255, 0.12);
}

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

html {
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    background: var(--cb-black);
    color: var(--cb-ink);
    font-family: 'Kabel', 'Segoe UI', system-ui, -apple-system, sans-serif;
    font-size: 17px;
    line-height: 1.65;
    overflow-x: hidden;
}

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

a {
    color: var(--cb-cyan);
}

.cs-wrap {
    width: min(1080px, calc(100% - 40px));
    margin: 0 auto;
}

/* ---------- Header ---------- */
.cs-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(5, 8, 14, 0.82);
    border-bottom: 1px solid var(--cb-line);
    backdrop-filter: blur(12px);
}

.cs-header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    min-height: 68px;
}

.cs-brand img {
    height: 34px;
    width: auto;
}

.cs-header nav {
    display: flex;
    flex-wrap: wrap;
    gap: 22px;
}

.cs-header nav a {
    color: var(--cb-ink);
    text-decoration: none;
    font-size: 13px;
    letter-spacing: 1.6px;
    text-transform: uppercase;
    opacity: 0.82;
    transition: opacity 0.2s ease, color 0.2s ease;
}

.cs-header nav a:hover,
.cs-header nav a:focus-visible {
    color: var(--cb-cyan);
    opacity: 1;
}

/* ---------- Hero ---------- */
main {
    padding: 70px 0 40px;
}

.cs-kicker {
    margin: 0 0 14px;
    color: var(--cb-cyan);
    font-size: 12px;
    letter-spacing: 4px;
    text-transform: uppercase;
}

h1 {
    margin: 0 0 20px;
    font-size: clamp(2.4rem, 6vw, 4.2rem);
    line-height: 1.02;
    letter-spacing: -0.5px;
    font-weight: 700;
}

.cs-lede {
    margin: 0 0 46px;
    max-width: 62ch;
    font-size: clamp(1.05rem, 2vw, 1.3rem);
    color: var(--cb-muted);
}

.cs-hero {
    position: relative;
    border: 1px solid var(--cb-line);
    border-radius: 18px;
    overflow: hidden;
    background: linear-gradient(135deg, rgba(13, 71, 161, 0.55), rgba(20, 236, 213, 0.12));
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.55);
}

.cs-hero img {
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: cover;
}

/* ---------- Meta ---------- */
.cs-meta {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1px;
    margin: 34px 0 10px;
    padding: 0;
    background: var(--cb-line);
    border: 1px solid var(--cb-line);
    border-radius: 14px;
    overflow: hidden;
}

.cs-meta > div {
    background: #080d16;
    padding: 18px 20px;
}

.cs-meta dt {
    color: var(--cb-muted);
    font-size: 11px;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 6px;
}

.cs-meta dd {
    margin: 0;
    font-size: 15px;
    font-weight: 600;
}

/* ---------- Article ---------- */
.cs-body {
    max-width: 820px;
    padding-top: 40px;
}

.cs-body section {
    margin-bottom: 46px;
}

.cs-body h2 {
    margin: 0 0 14px;
    font-size: 22px;
    letter-spacing: 0.4px;
}

.cs-body h2::after {
    content: "";
    display: block;
    width: 46px;
    height: 2px;
    margin-top: 10px;
    background: var(--cb-cyan);
}

.cs-body p {
    margin: 0 0 16px;
    color: #cdd8e5;
}

.cs-list {
    margin: 0;
    padding: 0;
    list-style: none;
}

.cs-list li {
    position: relative;
    padding: 0 0 0 26px;
    margin-bottom: 12px;
    color: #cdd8e5;
}

.cs-list li::before {
    content: "";
    position: absolute;
    left: 2px;
    top: 0.62em;
    width: 8px;
    height: 8px;
    background: var(--cb-cyan);
    transform: rotate(45deg);
}

.cs-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.cs-tags li {
    padding: 8px 14px;
    border: 1px solid rgba(20, 236, 213, 0.35);
    border-radius: 999px;
    color: var(--cb-cyan);
    font-size: 13px;
    letter-spacing: 0.4px;
}

/* ---------- CTA ---------- */
.cs-cta {
    margin: 56px 0;
    padding: 34px;
    border-radius: 18px;
    border: 1px solid rgba(20, 236, 213, 0.28);
    background:
        radial-gradient(circle at 100% 0%, rgba(13, 71, 161, 0.55), transparent 60%),
        #080d16;
}

.cs-cta h2 {
    margin-top: 0;
}

.cs-cta h2::after {
    display: none;
}

.cs-cta-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 20px;
}

.cs-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 46px;
    padding: 12px 22px;
    border-radius: 999px;
    border: 1px solid var(--cb-line);
    color: var(--cb-ink);
    text-decoration: none;
    font-size: 13px;
    letter-spacing: 1.2px;
    text-transform: uppercase;
    transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.cs-btn:hover,
.cs-btn:focus-visible {
    transform: translateY(-2px);
    border-color: var(--cb-cyan);
    color: var(--cb-cyan);
}

.cs-btn-primary {
    background: var(--cb-cyan);
    border-color: var(--cb-cyan);
    color: #041018;
    font-weight: 700;
}

.cs-btn-primary:hover,
.cs-btn-primary:focus-visible {
    background: #0ff0d8;
    color: #041018;
}

/* ---------- Related ---------- */
.cs-related {
    padding-top: 20px;
    border-top: 1px solid var(--cb-line);
}

.cs-related h2 {
    font-size: 16px;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--cb-muted);
}

.cs-related > div {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
}

.cs-related a {
    display: block;
    padding: 18px;
    border: 1px solid var(--cb-line);
    border-radius: 14px;
    background: #080d16;
    text-decoration: none;
    transition: border-color 0.2s ease, transform 0.2s ease;
}

.cs-related a:hover,
.cs-related a:focus-visible {
    border-color: var(--cb-cyan);
    transform: translateY(-3px);
}

.cs-related span {
    display: block;
    color: var(--cb-ink);
    font-weight: 600;
    margin-bottom: 4px;
}

.cs-related small {
    color: var(--cb-muted);
    font-size: 12px;
}

.cs-back {
    display: inline-block;
    margin-top: 22px;
    color: var(--cb-muted);
    font-size: 13px;
    letter-spacing: 1px;
    text-transform: uppercase;
    text-decoration: none;
}

.cs-back:hover {
    color: var(--cb-cyan);
}

/* ---------- Footer ---------- */
.cs-footer {
    margin-top: 40px;
    padding: 34px 0 90px;
    border-top: 1px solid var(--cb-line);
    color: var(--cb-muted);
    font-size: 13px;
}

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
    .cs-meta {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .cs-related > div {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    body {
        font-size: 16px;
    }

    .cs-header-inner {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
        padding: 12px 0;
    }

    .cs-header nav {
        gap: 14px;
    }

    .cs-header nav a {
        font-size: 12px;
        letter-spacing: 1px;
    }

    main {
        padding-top: 40px;
    }

    .cs-meta {
        grid-template-columns: 1fr;
    }

    .cs-cta {
        padding: 24px 20px;
    }
}