/* Case studies — variant styles */

/* ── V2 Editorial Index ─────────────────────────────────────── */
.cs-edit-list { display: grid; gap: 0; border-top: 1px solid var(--slate-200); }
.cs-edit-row {
  display: grid;
  grid-template-columns: 64px 100px 1fr 180px 32px;
  gap: 32px;
  align-items: center;
  padding: 32px 8px;
  border-bottom: 1px solid var(--slate-200);
  text-decoration: none; color: inherit;
  transition: background .2s ease, padding .2s ease;
}
.cs-edit-row:hover { background: var(--slate-50); padding-left: 16px; }
.cs-edit-num {
  font-family: var(--font-display); font-weight: 700; font-size: 28px;
  color: var(--slate-300); letter-spacing: -0.02em;
}
.cs-edit-row:hover .cs-edit-num { color: var(--cyan-500); }
.cs-edit-meta { display: grid; gap: 6px; }
.cs-edit-year { font-family: var(--font-display); font-weight: 600; font-size: 14px; color: var(--ink); }
.cs-edit-tag {
  font-size: 11px; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.06em;
  color: var(--slate-500);
}
.cs-edit-client { font-size: 12px; font-weight: 600; color: var(--cyan-600); text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 6px; }
.cs-edit-title {
  font-family: var(--font-display); font-weight: 700;
  font-size: 22px; line-height: 1.25; letter-spacing: -0.02em;
  color: var(--ink); margin-bottom: 8px;
  text-wrap: pretty; max-width: 560px;
}
.cs-edit-excerpt { color: var(--slate-500); font-size: 14.5px; line-height: 1.55; max-width: 560px; }
.cs-edit-metric { text-align: right; }
.cs-edit-metric-v {
  font-family: var(--font-display); font-weight: 700;
  font-size: 32px; letter-spacing: -0.02em; color: var(--ink);
  line-height: 1;
}
.cs-edit-metric-l { font-size: 12px; color: var(--slate-500); margin-top: 6px; }
.cs-edit-arrow { color: var(--slate-400); display: grid; place-items: center; }
.cs-edit-arrow svg { width: 22px; height: 22px; transition: transform .2s ease, color .2s ease; }
.cs-edit-row:hover .cs-edit-arrow svg { transform: translateX(4px); color: var(--cyan-500); }

@media (max-width: 960px) {
  .cs-edit-row {
    grid-template-columns: 48px 1fr;
    gap: 16px;
    padding: 24px 8px;
  }
  .cs-edit-meta, .cs-edit-metric, .cs-edit-arrow { display: none; }
  .cs-edit-num { font-size: 22px; }
  .cs-edit-title { font-size: 18px; }
}

/* ── V3 Featured + tabs ────────────────────────────────────── */
.cs-feat {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 48px;
  align-items: center;
  background: #fff;
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-xl);
  padding: 32px;
  box-shadow: var(--shadow);
  margin-bottom: 32px;
}
.cs-feat-cover { aspect-ratio: 4/3; border-radius: var(--radius-lg); overflow: hidden; }
.cs-feat-cover .cs-cover { aspect-ratio: 4/3; height: 100%; }
.cs-feat-body { display: grid; gap: 16px; align-content: start; }
.cs-feat-client {
  font-family: var(--font-body); font-weight: 600; font-size: 13px;
  color: var(--cyan-600); text-transform: uppercase; letter-spacing: 0.08em;
}
.cs-feat-title {
  font-family: var(--font-display); font-weight: 700;
  font-size: 36px; line-height: 1.15; letter-spacing: -0.02em;
  color: var(--ink); text-wrap: pretty;
}
.cs-feat-excerpt { font-size: 16px; line-height: 1.6; color: var(--slate-500); }
.cs-feat-metrics {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 16px; padding: 20px 0;
  border-top: 1px solid var(--slate-100);
  border-bottom: 1px solid var(--slate-100);
  margin: 8px 0;
}
.cs-feat-metric-v { font-family: var(--font-display); font-weight: 700; font-size: 22px; letter-spacing: -0.02em; color: var(--ink); }
.cs-feat-metric-l { font-size: 12px; color: var(--slate-500); margin-top: 4px; }
.cs-feat-tabs {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 8px;
  background: #fff;
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-lg);
  padding: 8px;
}
.cs-feat-tab {
  display: grid; gap: 4px;
  padding: 14px 16px;
  border-radius: var(--radius);
  text-align: left;
  background: transparent;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all .15s ease;
  min-height: 80px;
  align-content: start;
}
.cs-feat-tab:hover { background: var(--slate-50); }
.cs-feat-tab.is-active { background: var(--ink); color: #fff; }
.cs-feat-tab-num { font-family: var(--font-display); font-weight: 700; font-size: 12px; color: var(--slate-400); letter-spacing: 0.04em; }
.cs-feat-tab.is-active .cs-feat-tab-num { color: var(--cyan-300); }
.cs-feat-tab-client { font-family: var(--font-display); font-weight: 600; font-size: 14px; color: inherit; }
.cs-feat-tab-meta { font-size: 11px; color: var(--slate-500); text-transform: uppercase; letter-spacing: 0.05em; }
.cs-feat-tab.is-active .cs-feat-tab-meta { color: rgba(255,255,255,0.6); }

@media (max-width: 960px) {
  .cs-feat { grid-template-columns: 1fr; padding: 20px; }
  .cs-feat-title { font-size: 28px; }
  .cs-feat-tabs { grid-template-columns: 1fr 1fr; }
}

/* ── V4 Timeline ───────────────────────────────────────────── */
.cs-tl { position: relative; padding: 16px 0; }
.cs-tl-spine {
  position: absolute; left: 50%; top: 0; bottom: 0;
  width: 2px; transform: translateX(-1px);
  background: linear-gradient(180deg, transparent 0%, var(--slate-200) 8%, var(--slate-200) 92%, transparent 100%);
}
.cs-tl-row {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 60px 1fr;
  align-items: center;
  margin-bottom: 32px;
}
.cs-tl-row.is-left .cs-tl-card { grid-column: 1; text-align: right; justify-self: end; }
.cs-tl-row.is-left .cs-tl-card .cs-tl-meta,
.cs-tl-row.is-left .cs-tl-card .cs-tl-result { justify-content: flex-end; }
.cs-tl-row.is-left .cs-tl-card .cs-link { float: right; }
.cs-tl-row.is-right .cs-tl-card { grid-column: 3; }
.cs-tl-node { grid-column: 2; justify-self: center; position: relative; z-index: 1; }
.cs-tl-node-inner {
  width: 56px; height: 56px;
  background: #fff;
  border: 2px solid var(--cyan-500);
  border-radius: 999px;
  display: grid; place-items: center;
  font-family: var(--font-display); font-weight: 700;
  font-size: 14px; color: var(--cyan-600);
  box-shadow: 0 4px 12px rgba(6,182,212,0.25);
}
.cs-tl-card {
  background: #fff;
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-lg);
  padding: 24px;
  max-width: 440px;
  transition: all .2s ease;
  display: grid; gap: 8px;
}
.cs-tl-card:hover { border-color: var(--cyan-500); transform: translateY(-2px); box-shadow: var(--shadow); }
.cs-tl-meta { display: flex; gap: 8px; align-items: center; font-size: 12px; color: var(--slate-500); font-weight: 500; }
.cs-tl-year { color: var(--ink); font-weight: 600; }
.cs-tl-dot { color: var(--slate-300); }
.cs-tl-client { font-size: 12px; font-weight: 600; color: var(--cyan-600); text-transform: uppercase; letter-spacing: 0.08em; }
.cs-tl-title { font-family: var(--font-display); font-weight: 700; font-size: 20px; letter-spacing: -0.01em; color: var(--ink); line-height: 1.3; text-wrap: pretty; }
.cs-tl-excerpt { font-size: 14px; line-height: 1.55; color: var(--slate-500); }
.cs-tl-result { display: flex; align-items: center; gap: 6px; color: var(--cyan-600); font-weight: 600; font-size: 13.5px; padding: 8px 0; }

@media (max-width: 820px) {
  .cs-tl-spine { left: 28px; }
  .cs-tl-row { grid-template-columns: 56px 1fr; gap: 16px; }
  .cs-tl-row.is-left .cs-tl-card,
  .cs-tl-row.is-right .cs-tl-card { grid-column: 2; text-align: left; max-width: 100%; justify-self: stretch; }
  .cs-tl-row.is-left .cs-tl-card .cs-tl-meta,
  .cs-tl-row.is-left .cs-tl-card .cs-tl-result { justify-content: flex-start; }
  .cs-tl-row.is-left .cs-tl-card .cs-link { float: none; }
  .cs-tl-node { grid-column: 1; justify-self: start; }
  .cs-tl-node-inner { width: 48px; height: 48px; }
}