/* ==========================================================================
   NEDEN — solda dikey sekme listesi, sağda "bugün / Mükellef Portal ile" paneli
   ========================================================================== */

.cases {
  display: grid;
  grid-template-columns: 290px minmax(0, 1fr);
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background: var(--surface);
  box-shadow: var(--shadow);
  overflow: hidden;
}

/* ---------- Sekme listesi ---------- */
.cases__nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px;
  border-right: 1px solid var(--line);
  background: var(--surface-2);
}

.cases__tab {
  position: relative;
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr);
  align-items: center;
  column-gap: 12px;
  padding: 14px;
  border-radius: 14px;
  text-align: left;
  color: var(--muted);
  overflow: hidden;
  transition: color .25s, background-color .25s, box-shadow .25s;
}
.cases__tab:hover { color: var(--ink); background: rgb(11 26 51 / .03); }

.cases__tab[aria-selected="true"] {
  color: var(--ink);
  background: var(--surface);
  box-shadow: var(--shadow-sm), inset 0 0 0 1px var(--line);
}

.cases__tab-idx {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  grid-row: span 2;
  border-radius: 10px;
  background: var(--surface);
  box-shadow: inset 0 0 0 1px var(--line);
  color: var(--muted);
  transition: background-color .25s, color .25s;
}
.cases__tab-idx .i { width: 18px; height: 18px; }
.cases__tab[aria-selected="true"] .cases__tab-idx { background: var(--navy-900); color: #fff; box-shadow: none; }

.cases__tab-label { font-size: 15px; font-weight: 700; white-space: nowrap; }
.cases__tab-sub { font-size: 12.5px; color: var(--muted); line-height: 1.35; }

/* Otomatik geçişin ilerleme çubuğu (sekmenin alt kenarında) */
.cases__progress {
  position: absolute;
  left: 14px; right: 14px; bottom: 0;
  height: 2px;
  overflow: hidden;
  border-radius: 2px;
}
.cases__progress i {
  display: block;
  height: 100%;
  background: var(--red-600);
  transform: scaleX(0);
  transform-origin: left;
}
.cases__tab[aria-selected="true"] .cases__progress i { transform: scaleX(var(--progress, 0)); }
.cases.is-static .cases__progress { display: none; }

/* ---------- Paneller ---------- */
/* Tüm paneller aynı hücrede üst üste durur; kap en uzun panelin yüksekliğini alır,
   böylece sekme değişince sayfa zıplamaz. JS yoksa paneller alt alta sıralanır. */
.cases__panels { display: grid; }

.js .case { grid-area: 1 / 1; }
.js .case:not(.is-active) {
  visibility: hidden;
  opacity: 0;
  pointer-events: none;
}

.case {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  align-items: center;
  gap: clamp(28px, 4vw, 56px);
  padding: clamp(28px, 3.5vw, 48px);
}

.case.is-active { animation: case-in .6s var(--ease-out); }
@keyframes case-in {
  from { opacity: 0; transform: translate3d(0, 10px, 0); }
}

.case__copy { display: grid; align-content: start; gap: 24px; }

.case__block { display: grid; gap: 8px; }

.case__label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  width: fit-content;
  padding: 4px 10px 4px 8px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .04em;
  text-transform: uppercase;
}
.case__label .i { width: 14px; height: 14px; stroke-width: 2.75; }
.case__block--before .case__label { background: var(--red-50); color: var(--red-600); }
.case__block--after .case__label { background: var(--green-100); color: var(--green-600); }

.case__block h3 { font-size: 1.25rem; letter-spacing: -.02em; }
.case__block p { color: var(--ink-2); font-size: 15px; line-height: 1.65; }
.case__block--before h3 { color: var(--ink-2); }
.case__block--before p { color: var(--muted); }

/* "Bugün" ile "Mükellef Portal ile" arasındaki bağlayıcı */
.case__block--after {
  position: relative;
  padding: 20px;
  border-radius: 16px;
  background: var(--surface-2);
  box-shadow: inset 0 0 0 1px var(--line);
}

.case__stat {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 4px 12px;
  font-size: var(--fs-sm);
  color: var(--muted);
}
.case__stat .num { font-size: 1.5rem; font-weight: 800; letter-spacing: -.03em; color: var(--navy-900); }

/* Sağdaki mockup: satırlar sırayla yerine oturur */
.case__visual {
  position: relative;
  padding: clamp(14px, 2.5vw, 28px);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(rgb(11 31 69 / .12) 1px, transparent 1.2px) 0 0 / 18px 18px,
    var(--bg-alt);
}

.case.is-active .mock-row { animation: row-in .6s var(--ease-out) backwards; }
.case.is-active .mock-row:nth-child(1) { animation-delay: .12s; }
.case.is-active .mock-row:nth-child(2) { animation-delay: .2s; }
.case.is-active .mock-row:nth-child(3) { animation-delay: .28s; }
.case.is-active .mock-row:nth-child(4) { animation-delay: .36s; }

/* ---------- Duyarlı ---------- */
@media (max-width: 1140px) {
  .cases { grid-template-columns: minmax(0, 1fr); }
  .cases__nav {
    flex-direction: row;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scrollbar-width: none;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }
  .cases__nav::-webkit-scrollbar { display: none; }
  .cases__tab { flex: none; scroll-snap-align: start; padding: 10px 14px 12px 10px; }
  .cases__tab-sub { display: none; }
  .cases__tab-idx { grid-row: auto; width: 30px; height: 30px; border-radius: 8px; }
}

@media (max-width: 860px) {
  /* minmax(0, …): mockup'taki kırılmayan satırlar sütunu genişletip metni kesmesin */
  .case { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 560px) {
  .cases { border-radius: var(--radius-lg); margin-inline: calc(var(--gutter) * -.5); }
  .case { padding: 22px 18px 20px; gap: 24px; }
  .case__block--after { padding: 16px; }
  .case__visual { margin-inline: -6px; padding: 10px; }
  .mock-row { padding: 12px 10px; gap: 10px; }
}