.st-main { display: grid; gap: 16px; }
.st-hero { display: grid; grid-template-columns: minmax(0, 1fr) 310px; gap: 28px; align-items: center; padding: 28px 30px; }
.st-hero h1 { margin: 4px 0 9px; font: 700 clamp(2rem, 4vw, 3.15rem) var(--font-display); letter-spacing: -.045em; }
.st-clock { display: grid; gap: 5px; padding: 18px; border: 1px solid color-mix(in srgb, var(--blue) 35%, var(--border)); border-radius: 15px; background: color-mix(in srgb, var(--blue) 7%, var(--surface)); }
.st-clock span, .st-stat span { color: var(--text-3); font-size: .68rem; font-weight: 800; letter-spacing: .07em; text-transform: uppercase; }
.st-clock strong { font: 700 1.15rem var(--font-display); }
.st-clock small, .st-stat small { color: var(--text-3); font-size: .7rem; }
.st-summary { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 10px; }
.st-stat { display: grid; gap: 4px; padding: 15px 17px; border-left: 3px solid var(--border); }
.st-stat strong { font: 700 1.55rem var(--font-display); }
.st-stat--sell { border-left-color: var(--red); }
.st-stat--sell strong { color: var(--red); }
.st-stat--up { border-left-color: var(--green); }
.st-stat--up strong { color: var(--green); }
.st-stat--favorite { border-left-color: #f59e0b; }
.st-stat--favorite strong, .st-star { color: #f59e0b; }
.st-star { font-size: .8rem; }
.st-controls { display: flex; justify-content: space-between; align-items: center; gap: 14px; padding: 12px 14px; }
.st-filter-stack { display: grid; gap: 7px; }
.st-view-tabs { display: flex; flex-wrap: wrap; gap: 6px; }
.st-view-tabs button { padding: 9px 12px; border: 1px solid var(--border); border-radius: 9px; color: var(--text-2); font-size: .73rem; font-weight: 800; }
.st-view-tabs button.active { border-color: var(--blue); background: var(--blue); color: #fff; }
.st-view-tabs button.up:not(.active) { color: var(--green); border-color: color-mix(in srgb, var(--green) 35%, var(--border)); background: color-mix(in srgb, var(--green) 6%, var(--surface)); }
.st-view-tabs button.down:not(.active) { color: var(--red); border-color: color-mix(in srgb, var(--red) 35%, var(--border)); background: color-mix(in srgb, var(--red) 6%, var(--surface)); }
.st-tabs, .st-control-right { display: flex; align-items: center; flex-wrap: wrap; gap: 6px; }
.st-tabs button { padding: 8px 11px; border: 1px solid var(--border); border-radius: 9px; color: var(--text-2); font-size: .73rem; font-weight: 750; }
.st-tabs button.active { border-color: var(--blue); background: var(--blue); color: #fff; }
.st-control-right select, .st-control-right input { height: 38px; border: 1px solid var(--border); border-radius: 9px; background: var(--surface); color: var(--text); font-size: .74rem; }
.st-control-right select { padding: 0 28px 0 10px; }
.st-control-right input { width: 210px; padding: 0 11px; }

/* Table and sticky column setup (FR-03) */
.st-table-card { overflow: hidden; padding: 0; }
.st-table-head { display: flex; align-items: center; justify-content: space-between; padding: 18px 20px; border-bottom: 1px solid var(--border); }
.st-table-head h2 { margin-top: 3px; font: 700 1.2rem var(--font-display); }
.st-table-head > span { color: var(--text-3); font-size: .72rem; }
.st-table-wrap { overflow: auto; position: relative; }
.st-table { width: 100%; min-width: 1240px; border-collapse: separate; border-spacing: 0; }
.st-table th { position: sticky; top: 0; z-index: 2; padding: 10px 12px; background: var(--surface-2); color: var(--text-3); font-size: .65rem; letter-spacing: .055em; text-transform: uppercase; text-align: right; white-space: nowrap; border-bottom: 1px solid var(--border); }
.st-table th:first-child { text-align: left; }
.st-table td { padding: 11px 12px; border-top: 1px solid var(--border); font-size: .75rem; text-align: right; vertical-align: middle; }
.st-table td:first-child { text-align: left; }
.st-table tbody tr { transition: background .16s ease; }
.st-table tbody tr:hover { background: color-mix(in srgb, var(--blue) 5%, transparent); }

/* FR-03: Sticky Hisse Sütunu */
.st-table th:first-child,
.st-table th.st-col-sticky {
  position: sticky;
  left: 0;
  z-index: 5;
  background: var(--surface-2) !important;
  box-shadow: 2px 0 6px rgba(0, 0, 0, 0.08);
}
.st-table td.st-col-sticky,
.st-table td:first-child:not([colspan]) {
  position: sticky;
  left: 0;
  z-index: 4;
  background: var(--surface);
  box-shadow: 2px 0 6px rgba(0, 0, 0, 0.08);
}
.st-table tbody tr:hover td.st-col-sticky,
.st-table tbody tr:hover td:first-child:not([colspan]) {
  background: color-mix(in srgb, var(--blue) 8%, var(--surface));
}

/* FR-03: Signal Group Header z-index and border */
.st-signal-group td {
  position: sticky;
  top: 37px;
  z-index: 3;
  left: auto !important;
  padding: 10px 14px !important;
  text-align: left !important;
  background: var(--surface) !important;
  border-top: 2px solid var(--border) !important;
  border-bottom: 1px solid var(--border) !important;
}
.st-signal-group td span { margin-right: 7px; }
.st-signal-group td strong { font-size: .74rem; letter-spacing: .045em; }
.st-signal-group td em { margin-left: 8px; color: var(--text-3); font-size: .65rem; font-style: normal; }
.st-signal-group.up td, .st-signal-group.up td span { color: var(--green); }
.st-signal-group.down td, .st-signal-group.down td span { color: var(--red); }

.st-asset { display: flex; align-items: center; gap: 9px; color: inherit; text-decoration: none; }
.st-asset img { width: 32px; height: 32px; flex: none; border: 1px solid var(--border); border-radius: 50%; background: #fff; object-fit: contain; }
.st-asset > span { display: grid; gap: 2px; min-width: 0; }
.st-asset strong { font-size: .8rem; }
.st-asset small { max-width: 190px; overflow: hidden; color: var(--text-3); font-size: .66rem; text-overflow: ellipsis; white-space: nowrap; }

.st-timeframe { display: inline-flex; padding: 5px 7px; border-radius: 7px; background: var(--surface-2); color: var(--text-2); font-size: .66rem; font-weight: 800; white-space: nowrap; }
.st-timeframe.daily { color: var(--blue); background: color-mix(in srgb, var(--blue) 10%, var(--surface)); }
.st-direction { display: inline-flex; align-items: center; gap: 5px; padding: 6px 8px; border-radius: 999px; font-size: .65rem; font-weight: 850; }
.st-direction.up { color: var(--green); background: var(--green-glow); }
.st-direction.down { color: var(--red); background: var(--red-glow); }
.st-direction i { width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.st-level { display: grid; gap: 2px; }
.st-level strong { font-size: .79rem; }
.st-level small { color: var(--text-3); font-size: .62rem; }
.st-value-good { color: var(--green); }
.st-value-bad { color: var(--red); }
.st-value-warn { color: var(--amber); }
.st-rsi { display: grid; gap: 2px; }
.st-rsi strong { font-size: .8rem; }
.st-rsi small { font-size: .61rem; color: var(--text-3); }
.st-warnings { padding: 10px 14px; border-top: 1px solid var(--border); color: var(--amber); font-size: .68rem; line-height: 1.45; }
.st-loading-row td { color: var(--text-3); text-align: center !important; }
.st-empty { padding: 35px !important; text-align: center !important; color: var(--text-3); }

/* FR-01: Status tags */
.st-signal-fresh { color: var(--green); font-size: .62rem; font-weight: 700; }
.st-badge-expired { color: var(--red); background: color-mix(in srgb, var(--red) 12%, transparent); padding: 1px 5px; border-radius: 4px; font-size: .6rem; font-weight: 800; }
.st-closed-at { color: var(--text-3); font-size: .62rem; white-space: nowrap; }
.st-live-price small.is-live { color: var(--green); font-weight: 700; }
.st-live-price small.is-closed { color: var(--text-3); font-size: .62rem; }
.st-live-price small.is-no-live { color: var(--amber); font-size: .62rem; }

.st-hero-side { display: grid; justify-items: end; gap: 10px; }
.st-favorites-link { display: inline-flex; align-items: center; justify-content: center; padding: 10px 14px; border: 1px solid color-mix(in srgb, #f59e0b 55%, var(--border)); border-radius: 10px; background: color-mix(in srgb, #f59e0b 10%, var(--surface)); color: #d88a05; font-size: .76rem; font-weight: 800; text-decoration: none; }
.st-favorites-link:hover { border-color: #f59e0b; background: color-mix(in srgb, #f59e0b 16%, var(--surface)); }
.st-price-note { display: block; margin-top: 5px; color: var(--text-3); font-size: .67rem; }
.st-global-countdown { display: block; margin-top: 3px; color: var(--amber); font: 700 1.05rem var(--font-display); letter-spacing: .025em; }
.st-action-btn { display: inline-flex; align-items: center; gap: 4px; padding: 5px 11px; border-radius: 8px; background: color-mix(in srgb, var(--blue) 12%, var(--surface)); border: 1px solid color-mix(in srgb, var(--blue) 35%, var(--border)); color: var(--blue); font-size: .68rem; font-weight: 800; text-decoration: none; white-space: nowrap; transition: all .18s ease; }
.st-action-btn:hover { background: var(--blue); color: #fff; border-color: var(--blue); transform: translateY(-1px); box-shadow: 0 3px 10px rgba(37, 99, 235, 0.3); }

/* BIST Sectors */
.st-sectors[hidden] { display: none; }
.st-sectors { padding: 24px; }
.st-sector-heading { display: flex; justify-content: space-between; align-items: center; gap: 16px; margin-bottom: 20px; }
.st-sector-heading h2 { font-size: 1.25rem; margin: 6px 0 8px; }
.st-sector-heading p:not(.eyebrow) { color: var(--text-3); font-size: .75rem; }
.st-sector-all { flex-shrink: 0; color: var(--blue); font-weight: 700; font-size: .75rem; padding: 10px 15px; border: 1px solid var(--border); border-radius: 10px; }
.st-sector-all.active { background: var(--blue-glow); border-color: var(--blue); }
.st-sector-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.st-sector-card { position: relative; display: flex; flex-direction: column; gap: 12px; min-width: 0; padding: 17px 18px; border: 1px solid var(--border); border-radius: 12px; background: var(--surface-2); text-align: left; color: var(--text); transition: border-color .15s, background .15s, transform .15s; }
.st-sector-card:hover { border-color: var(--blue); transform: translateY(-2px); }
.st-sector-card.active { border-color: var(--blue); background: var(--blue-glow); box-shadow: inset 3px 0 var(--blue); }
.st-sector-name { display: block; font-size: .83rem; font-weight: 700; line-height: 1.5; min-height: 2.5em; }
.st-sector-counts { font-size: .7rem; color: var(--text-2); font-variant-numeric: tabular-nums; }
.st-sector-bar { display: block; width: 100%; height: 4px; background: var(--border); border-radius: 8px; overflow: hidden; margin-top: auto; }
.st-sector-bar.has-data { background: var(--red); }
.st-sector-bar i { display: block; height: 100%; background: var(--green); width: 0; transition: width .25s; }

/* Page Layout & Sizing */
.st-page .st-main { width: min(1440px, calc(100% - 40px)); gap: 20px; }
.st-page .card { border-radius: 18px; }
.st-page .st-hero { position: relative; overflow: hidden; padding: 32px 36px; background: radial-gradient(ellipse at 15% 0%, var(--blue-glow), transparent 65%), var(--surface); border-top: 2px solid var(--blue); }
.st-page .st-hero h1 { font-size: clamp(1.8rem, 3.3vw, 2.8rem); }
.st-page .st-hero .page-desc { max-width: 580px; font-size: .95rem; line-height: 1.7; }
.st-hero-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.st-hero-tags span { border: 1px solid var(--border); border-radius: 7px; padding: 5px 9px; background: var(--surface); font-size: .68rem; color: var(--text-2); }
.st-page .st-clock { width: 100%; background: var(--surface); box-shadow: var(--shadow-sm); }
.st-page .st-clock strong { font-size: .8rem; color: var(--text-2); }
.st-page .st-global-countdown { font-size: 1.7rem; color: var(--text); font-variant-numeric: tabular-nums; }
.st-page .st-hero-side { width: 100%; }
.st-page .st-summary { gap: 12px; }
.st-page .st-stat { padding: 17px 20px; box-shadow: none; }
.st-page .st-stat strong { font-size: 1.8rem; font-variant-numeric: tabular-nums; }
.st-page .st-controls { display: grid; grid-template-columns: minmax(0, 1fr) auto; padding: 20px; align-items: start; }
.st-page .st-filter-stack { gap: 14px; }
.st-page .st-view-tabs { padding-bottom: 14px; border-bottom: 1px solid var(--border); }
.st-page .st-view-tabs button { min-height: 40px; border-radius: 10px; }
.st-page .st-tabs button { border-color: transparent; border-radius: 8px; min-height: 36px; }
.st-page .st-tabs button:not(.active):hover { background: var(--surface-2); border-color: var(--border); }
.st-page .st-control-right { padding-top: 1px; }
.st-page .st-control-right input { height: 40px; background: var(--surface-2); }
.st-page button:focus-visible, .st-page a:focus-visible { outline: 3px solid var(--blue); outline-offset: 3px; }
.st-page .st-table-head { padding: 22px 24px; gap: 16px; }
.st-table-meta { display: flex; flex-shrink: 0; flex-direction: column; gap: 6px; align-items: flex-end; font-size: .75rem; color: var(--text-2); }
.st-table-meta button { color: var(--blue); font-size: .7rem; padding: 5px; }
.st-page .st-table td { padding: 15px 12px; font-variant-numeric: tabular-nums; }
.st-page .st-table th { padding: 13px 12px; }
.st-page .st-signal-group td { top: 41px; }
.st-page .st-asset img { width: 34px; height: 34px; }
.st-page .st-empty { padding: 45px 18px !important; font-size: .85rem; }

/* Responsive Media Queries */
@media (max-width: 1100px) {
  .st-page .st-controls { grid-template-columns: 1fr; }
  .st-page .st-control-right { justify-content: flex-end; }
}

@media (max-width: 980px) {
  .st-hero { grid-template-columns: 1fr; }
  .st-summary { grid-template-columns: repeat(3, 1fr); }
  .st-controls { align-items: stretch; flex-direction: column; }
  .st-control-right { width: 100%; }
  .st-control-right input { flex: 1; width: auto; }
}

@media (max-width: 768px) {
  .st-page .st-main { width: calc(100% - 24px); gap: 14px; }
  .st-page .st-hero { padding: 24px; }
  .st-hero-side { justify-items: stretch; }
  .st-favorites-link { width: 100%; }
  .st-page .st-summary { gap: 8px; }
  .st-page .st-stat { padding: 12px; }
  .st-page .st-table-head { padding: 18px; }
  .st-page .st-table-head h2 { font-size: 1.05rem; }

  /* FR-03: Kompakt yatay kaydırılabilir sektör seçici */
  .st-sectors { padding: 16px; }
  .st-sector-heading { flex-direction: column; align-items: flex-start; gap: 8px; margin-bottom: 12px; }
  .st-sector-grid {
    display: flex !important;
    flex-wrap: nowrap !important;
    overflow-x: auto !important;
    gap: 8px !important;
    padding: 4px 2px 10px !important;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
  }
  .st-sector-card {
    flex: 0 0 160px !important;
    padding: 10px 12px !important;
    gap: 6px !important;
  }
  .st-sector-name {
    min-height: auto !important;
    font-size: .74rem !important;
    white-space: nowrap !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
  }
  .st-sector-counts { font-size: .61rem !important; }
}

@media (max-width: 600px) {
  .st-asset { gap: 7px; }
  .st-asset img { width: 26px; height: 26px; }
  .st-asset strong { font-size: .78rem; }
  .st-asset small { max-width: 105px; font-size: .62rem; }
  .st-table td.st-col-sticky,
  .st-table th.st-col-sticky {
    max-width: 140px;
    padding: 10px 8px;
  }
}

@media (max-width: 480px) {
  .st-page .st-controls { padding: 14px; }
  .st-page .st-tabs { display: flex; flex-wrap: nowrap; overflow-x: auto; width: 100%; padding: 3px 0 8px; }
  .st-page .st-tabs button { flex: 0 0 auto; width: auto; white-space: nowrap; }
  .st-page .st-filter-stack { min-width: 0; }
  .st-page .st-table-head { align-items: flex-start; }
  .st-hero-tags { margin-top: 14px; }
  .st-page .st-summary { grid-template-columns: 1fr 1fr; }
  .st-page .st-summary .st-stat:last-child { grid-column: 1 / -1; display: flex; align-items: center; justify-content: space-between; }
  .st-page .st-control-right { display: flex; }
  .st-page .st-control-right input { width: 0; min-width: 0; flex: 1; }
  .st-view-tabs { display: grid; grid-template-columns: 1fr 1fr; }
  .st-view-tabs button { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  .st-sector-card, .st-sector-bar i { transition: none; }
  .st-sector-card:hover { transform: none; }
}

/* GUI-04: Compact table mode */
.st-table.is-compact-mode .st-col-detail {
  display: none !important;
}
.st-table.is-compact-mode {
  min-width: 800px;
}

.st-mode-toggle {
  display: inline-flex;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  margin-right: 8px;
}
.st-mode-toggle button {
  padding: 4px 10px;
  font-size: .69rem;
  font-weight: 750;
  background: var(--surface-2);
  color: var(--text-2);
  border: none;
  cursor: pointer;
  transition: all .15s;
}
.st-mode-toggle button.active {
  background: var(--blue);
  color: #fff;
}


/* GUI-04: Sortable headers */
th[data-sort] {
  cursor: pointer;
  user-select: none;
  transition: color .15s;
}
th[data-sort]:hover {
  color: var(--text);
}
th[data-sort]::after {
  content: ' ↕';
  opacity: .35;
  font-size: .62rem;
}
th[data-sort].sort-asc::after {
  content: ' ▲';
  opacity: 1;
  color: var(--blue);
}
th[data-sort].sort-desc::after {
  content: ' ▼';
  opacity: 1;
  color: var(--blue);
}


/* GUI-03: Preview Button & Action Cell */
.st-action-cell {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 6px;
}
.st-preview-btn {
  padding: 4px 8px;
  font-size: .68rem;
  font-weight: 750;
  border-radius: 7px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text-2);
  cursor: pointer;
  transition: all .15s;
  white-space: nowrap;
}
.st-preview-btn:hover {
  color: var(--blue);
  border-color: var(--blue);
  background: var(--surface);
}

/* GUI-03: Preview Drawer & Overlay */
.st-preview-drawer[hidden], .st-preview-overlay[hidden] { display: none; }
.st-preview-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, .5);
  backdrop-filter: blur(2px);
  z-index: 9998;
}
.st-preview-drawer {
  position: fixed;
  top: 0;
  right: 0;
  width: min(600px, 100vw);
  height: 100vh;
  background: var(--surface);
  border-left: 1px solid var(--border);
  box-shadow: -8px 0 32px rgba(0, 0, 0, .35);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-sizing: border-box;
  animation: stSlideIn .2s cubic-bezier(0.16, 1, 0.3, 1);
}
@keyframes stSlideIn {
  from { transform: translateX(100%); }
  to { transform: translateX(0); }
}
.st-preview-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
  background: var(--surface-2);
}
.st-preview-title {
  display: flex;
  align-items: center;
  gap: 10px;
}
.st-preview-logo {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  object-fit: cover;
  background: #fff;
  border: 1px solid var(--border);
}
.st-preview-title h3 {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--text);
}
.st-preview-title p {
  margin: 1px 0 0;
  font-size: .72rem;
  color: var(--text-3);
}
.st-preview-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}
.st-preview-full-btn {
  font-size: .72rem;
  font-weight: 750;
  padding: 4px 9px;
  border: 1px solid var(--border);
  border-radius: 7px;
  color: var(--text-2);
  text-decoration: none;
}
.st-preview-full-btn:hover {
  color: var(--blue);
  border-color: var(--blue);
}
.st-preview-close {
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 7px;
  color: var(--text-2);
  cursor: pointer;
  font-size: .95rem;
}
.st-preview-close:hover {
  background: var(--surface);
  color: var(--text);
}
.st-preview-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 18px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  font-size: .74rem;
  color: var(--text-2);
}
.st-preview-nav button {
  padding: 3px 9px;
  font-size: .7rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface-2);
  color: var(--text-2);
  cursor: pointer;
}
.st-preview-nav button:disabled {
  opacity: .4;
  cursor: not-allowed;
}
.st-preview-body {
  flex: 1;
  overflow-y: auto;
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.st-preview-badges {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.st-preview-price-text strong {
  font-size: 1.05rem;
  color: var(--text);
}
.st-preview-price-text small {
  font-size: .72rem;
  color: var(--text-3);
  margin-left: 4px;
}
.st-preview-chart-surface {
  width: 100%;
  height: 260px;
  border: 1px solid var(--border);
  border-radius: 9px;
  overflow: hidden;
}
.st-preview-rsi-surface {
  width: 100%;
  height: 90px;
  border: 1px solid var(--border);
  border-radius: 9px;
  overflow: hidden;
}
.st-preview-chart-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 24px;
  color: var(--text-3);
  font-size: .76rem;
}
.st-preview-levels-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 8px;
}
.st-preview-level-card {
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface-2);
  display: grid;
  gap: 2px;
}
.st-preview-level-card span {
  font-size: .63rem;
  color: var(--text-3);
  text-transform: uppercase;
  font-weight: 700;
}
.st-preview-level-card strong {
  font-size: .86rem;
  color: var(--text);
}
.st-preview-level-card small {
  font-size: .62rem;
  color: var(--text-3);
}