/* =============================================
   CASE STUDY — shared styling for project deep-dives
   Uses the site's design tokens from styles.css
   ============================================= */

.cs-page {
    max-width: 1080px;
    margin: 0 auto;
    padding: 130px 1.5rem 6rem;
    position: relative;
    z-index: 2;
}

.cs-back {
    display: inline-block;
    color: var(--text-secondary-color);
    text-decoration: none;
    font-size: 0.92rem;
    margin-bottom: 2.2rem;
    transition: color 0.2s, transform 0.2s;
}
.cs-back:hover { color: var(--accent-color); transform: translateX(-3px); }

/* ---------- HERO ---------- */
.cs-hero { max-width: 820px; margin-bottom: 3.5rem; }

.cs-eyebrow {
    display: inline-block;
    font-size: 0.78rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--accent-color);
    margin-bottom: 1rem;
}

.cs-hero h1 {
    font-size: clamp(2.4rem, 7vw, 4.5rem);
    line-height: 1;
    letter-spacing: -0.03em;
    margin: 0 0 1rem;
    color: var(--secondary-color);
}

.cs-tagline {
    font-size: 1.15rem;
    line-height: 1.6;
    color: var(--text-secondary-color);
    margin: 0 0 1.8rem;
}

.cs-tags { display: flex; flex-wrap: wrap; gap: 0.45rem; margin-bottom: 2rem; }
.cs-tag {
    font-size: 0.76rem;
    padding: 0.32em 0.8em;
    border-radius: 99px;
    background: var(--pill-bg);
    color: var(--pill-text);
    letter-spacing: 0.02em;
}

.cs-hero-actions { display: flex; flex-wrap: wrap; gap: 0.8rem; }
.cs-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4em;
    padding: 0.8em 1.6em;
    border-radius: 99px;
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    transition: transform 0.2s, box-shadow 0.2s, background 0.2s, color 0.2s;
}
.cs-btn--primary { background: var(--secondary-color); color: var(--bg-color); border: 1px solid var(--secondary-color); }
.cs-btn--primary:hover { transform: translateY(-3px); box-shadow: 0 8px 24px rgba(0,0,0,0.25); }
.cs-btn--ghost { background: transparent; color: var(--text-color); border: 1px solid var(--hero-border-color); }
.cs-btn--ghost:hover { border-color: var(--accent-color); color: var(--accent-color); transform: translateY(-3px); }

/* ---------- META BAR ---------- */
.cs-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 2.5rem;
    padding: 1.6rem 0;
    border-top: 1px solid var(--card-border);
    border-bottom: 1px solid var(--card-border);
    margin-bottom: 3.5rem;
}
.cs-meta dt {
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: var(--text-secondary-color);
    margin-bottom: 0.3rem;
}
.cs-meta dd { margin: 0; color: var(--secondary-color); font-weight: 600; }

/* ---------- SECTIONS ---------- */
.cs-section { margin-bottom: 4rem; }
.cs-section > h2 {
    font-size: clamp(1.6rem, 3.5vw, 2.4rem);
    color: var(--secondary-color);
    margin: 0 0 0.6rem;
    letter-spacing: -0.02em;
}
.cs-section-lead {
    color: var(--text-secondary-color);
    font-size: 1.05rem;
    line-height: 1.65;
    max-width: 720px;
    margin: 0 0 2rem;
}
.cs-body p { color: var(--text-color); font-size: 1.08rem; line-height: 1.75; margin: 0 0 1.2rem; max-width: 760px; }

/* ---------- GAMES GRID ---------- */
.cs-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
    gap: 1rem;
}
.cs-card {
    border: 1px solid var(--card-border);
    background: var(--card-bg);
    border-radius: 14px;
    padding: 1.3rem;
    backdrop-filter: blur(6px);
    transition: transform 0.2s, border-color 0.2s;
}
.cs-card:hover { transform: translateY(-4px); border-color: var(--accent-color); }
.cs-card h3 { margin: 0 0 0.3rem; color: var(--secondary-color); font-size: 1.1rem; }
.cs-card .cs-card-mode {
    font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.1em;
    color: var(--accent-color); font-weight: 700;
}
.cs-card p { margin: 0.5rem 0 0; color: var(--text-secondary-color); font-size: 0.9rem; line-height: 1.5; }

/* ---------- TECH STACK ---------- */
.cs-tech {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 0.8rem;
}
.cs-tech-item {
    display: flex; gap: 0.8rem; align-items: baseline;
    padding: 0.9rem 1rem;
    border: 1px solid var(--card-border);
    border-radius: 12px;
    background: var(--card-bg);
}
.cs-tech-item strong { color: var(--secondary-color); white-space: nowrap; }
.cs-tech-item span { color: var(--text-secondary-color); font-size: 0.9rem; line-height: 1.45; }

/* ---------- HIGHLIGHT (problem / solution) ---------- */
.cs-highlight {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    align-items: start;
    padding: 2rem 0;
    border-top: 1px solid var(--card-border);
}
.cs-highlight:last-of-type { border-bottom: 1px solid var(--card-border); }
.cs-highlight h3 { margin: 0 0 1rem; color: var(--secondary-color); font-size: 1.3rem; }
.cs-ps { margin-bottom: 0.9rem; }
.cs-ps-label {
    display: inline-block; font-size: 0.7rem; font-weight: 700;
    text-transform: uppercase; letter-spacing: 0.1em;
    padding: 0.2em 0.6em; border-radius: 6px; margin-right: 0.5rem;
}
.cs-ps--problem .cs-ps-label { background: rgba(212,45,45,0.15); color: #d42d2d; }
.cs-ps--solution .cs-ps-label { background: rgba(70,170,90,0.15); color: #46aa5a; }
.cs-ps p { display: inline; color: var(--text-color); line-height: 1.6; }

.cs-highlight figure { margin: 0; }
.cs-highlight img {
    width: 100%; border-radius: 12px; border: 1px solid var(--card-border); display: block;
}
.cs-highlight figcaption {
    margin-top: 0.6rem; font-size: 0.82rem; color: var(--text-secondary-color); text-align: center;
}

/* ---------- CODE ---------- */
pre.cs-code {
    margin: 0;
    background: #0b0b0f;
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 1.1rem 1.2rem;
    overflow-x: auto;
    font-size: 0.84rem;
    line-height: 1.6;
}
body:not(.dark-mode) pre.cs-code { background: #11131a; }
pre.cs-code code {
    font-family: 'JetBrains Mono', ui-monospace, monospace;
    color: #d6dbe8;
    white-space: pre;
}
.cs-code-label {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.74rem;
    color: var(--text-secondary-color);
    margin-bottom: 0.5rem;
}

/* ---------- COMPARE (before / after) ---------- */
.cs-compare {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.2rem;
}
.cs-compare figure { margin: 0; }
.cs-compare img {
    width: 100%;
    border-radius: 12px;
    border: 1px solid var(--card-border);
    display: block;
}
.cs-compare figcaption {
    margin-top: 0.6rem;
    font-size: 0.85rem;
    color: var(--text-secondary-color);
    text-align: center;
}

/* ---------- RESEARCH (user tests) ---------- */
.cs-research {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(330px, 1fr));
    gap: 1rem;
}
.cs-research-card {
    border: 1px solid var(--card-border);
    background: var(--card-bg);
    border-radius: 14px;
    padding: 1.4rem;
    backdrop-filter: blur(6px);
}
.cs-research-card h3 { margin: 0 0 0.2rem; color: var(--secondary-color); font-size: 1.15rem; }
.cs-research-meta {
    display: block;
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--accent-color);
    font-weight: 700;
    margin-bottom: 1rem;
}
.cs-research-label {
    display: block;
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-secondary-color);
    margin: 1rem 0 0.5rem;
}
.cs-sublist {
    margin: 0;
    padding-left: 1.1rem;
    color: var(--text-color);
}
.cs-sublist li { margin-bottom: 0.45rem; line-height: 1.5; font-size: 0.94rem; }

/* ---------- TIMELINE ---------- */
.cs-timeline { border-left: 2px solid var(--card-border); padding-left: 1.6rem; margin-left: 0.4rem; }
.cs-tl { position: relative; padding-bottom: 2.2rem; }
.cs-tl::before {
    content: ""; position: absolute; left: -1.95rem; top: 0.35rem;
    width: 11px; height: 11px; border-radius: 50%;
    background: var(--accent-color); box-shadow: 0 0 0 4px var(--bg-color);
}
.cs-tl-week { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.14em; color: var(--accent-color); font-weight: 700; }
.cs-tl h3 { margin: 0.2rem 0 0.6rem; color: var(--secondary-color); font-size: 1.15rem; }
.cs-tl p { color: var(--text-secondary-color); line-height: 1.65; margin: 0 0 1rem; max-width: 720px; }
.cs-tl img { width: 100%; max-width: 620px; border-radius: 12px; border: 1px solid var(--card-border); display: block; }
.cs-tl-imgs { display: flex; flex-wrap: wrap; gap: 0.8rem; }
.cs-tl-imgs img { max-width: 300px; flex: 1 1 260px; }

/* ---------- FEEDBACK ---------- */
.cs-feedback { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(280px,1fr)); gap: 0.6rem; }
.cs-feedback li {
    display: flex; align-items: center; gap: 0.6rem;
    padding: 0.7rem 1rem; border: 1px solid var(--card-border);
    border-radius: 10px; background: var(--card-bg); color: var(--text-color);
}
.cs-feedback li::before { content: "✓"; color: #46aa5a; font-weight: 700; }

/* ---------- CTA ---------- */
.cs-cta {
    text-align: center;
    padding: 3rem 1.5rem;
    border: 1px solid var(--card-border);
    border-radius: 18px;
    background: var(--card-bg);
}
.cs-cta h2 { margin: 0 0 0.6rem; color: var(--secondary-color); }
.cs-cta p { margin: 0 0 1.6rem; color: var(--text-secondary-color); }

@media (max-width: 760px) {
    .cs-highlight { grid-template-columns: 1fr; }
    .cs-compare { grid-template-columns: 1fr; }
    .cs-page { padding-top: 105px; }
}