/* ==========================================================================
   simdiiste design-system.css — Tek Sunum Kaynağı (U1)
   Kaynak: Kurumsal UI Spesifikasyonu §2 (token) + §6 (bilesen) + §10.3 (a11y)
   Kural: Bu dosya HARICINDE yeni renk/radius/font TANIMLANMAZ.
   Guvenlik: CSP-uyumlu — font harici harici kaynak yok.
   Kullanim: <link rel="stylesheet" href="/assets/design-system.css">
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=Plus+Jakarta+Sans:wght@500;600;700&display=swap');

/* --------------------------------------------------------------------------
   1. TOKENLAR (Sektör frekans analizi + simdiiste kurumsal palet)
   -------------------------------------------------------------------------- */
:root {
  color-scheme: light;

  /* Marka — renk akisi: nötr slate -> kurumsal aksan -> durum */
  --si-primary: #0f172a;
  --si-primary-dark: #1e293b;
  --si-primary-tint: rgba(15, 23, 42, 0.06);
  --si-primary-light: #334155;
  --si-accent: #059669;
  --si-accent-dark: #047857;
  --si-accent-tint: rgba(5, 150, 105, 0.08);
  --si-gradient: #0f172a;

  /* Nötr palet (slate) */
  --si-bg: #f8fafc;
  --si-surface: #ffffff;
  --si-surface-2: #f1f5f9;
  --si-text: #0f172a;
  --si-text-primary: #0f172a;
  --si-text-secondary: #334155;   /* WCAG AAA */
  --si-text-muted: #64748b;       /* AA 4.76:1 */
  --si-text-faint: #94a3b8;       /* SADECE placeholder/ikon — anlamli metinde YOK */
  --si-border: #e2e8f0;
  --si-border-strong: #cbd5e1;

  /* Durum renkleri + tint zeminleri */
  --si-success: #059669;  --si-success-tint: #f0fdf4;  --si-success-text: #065f46;
  --si-danger: #dc2626;   --si-danger-tint: #fef2f2;   --si-danger-text: #991b1b;
  --si-warning: #d97706;  --si-warning-tint: #fffbeb;  --si-warning-text: #92400e;
  --si-info: #334155;     --si-info-tint: #f1f5f9;     --si-info-text: #0f172a;

  /* Tipografi — tek font (Inter); baslik Plus Jakarta Sans (max 600 semi-bold) */
  --si-font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --si-font-display: 'Plus Jakarta Sans', 'Inter', -apple-system, sans-serif;
  --si-mono: ui-monospace, 'Geist Mono', 'SF Mono', Menlo, Consolas, monospace;
  --si-fs-xs: 11px; --si-fs-sm: 12px; --si-fs-base: 13px; --si-fs-md: 14px;
  --si-fs-lg: 16px; --si-fs-xl: 20px; --si-fs-2xl: 24px;

  /* Ölçü — 6/8px radius */
  --si-radius-sm: 6px; --si-radius-md: 8px; --si-radius-lg: 12px;
  --si-radius-pill: 999px;
  --si-space-1: 4px; --si-space-2: 8px; --si-space-3: 12px;
  --si-space-4: 16px; --si-space-5: 24px; --si-space-6: 32px;

  /* Golge / hareket / katman */
  --si-shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.03);
  --si-shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04);
  --si-shadow-md: 0 4px 12px rgba(15, 23, 42, 0.06);
  --si-shadow-lg: 0 10px 28px rgba(15, 23, 42, 0.09);
  --si-transition: 150ms ease;
  --si-z-rail: 40; --si-z-topbar: 30; --si-z-modal: 100; --si-z-toast: 120;

  /* Kabuk olculeri */
  --si-rail-width: 68px;
  --si-rail-width-open: 240px;
  --si-topbar-height: 56px;
}

/* Cift tema (§10.3) — <html class="dark">; localStorage ile kalici */
.dark {
  color-scheme: dark;
  --si-bg: #0b1220;
  --si-surface: #111d33;
  --si-surface-2: #1a2740;
  --si-text: #f1f5f9;
  --si-text-primary: #f1f5f9;
  --si-text-secondary: #cbd5e1;
  --si-text-muted: #94a3b8;
  --si-text-faint: #64748b;
  --si-border: #26344f;
  --si-border-strong: #3b4a6b;
  --si-primary-tint: rgba(56, 189, 248, 0.12);
  --si-accent-tint: rgba(16, 185, 129, 0.14);
  --si-success-tint: rgba(16, 185, 129, 0.15);
  --si-success-text: #6ee7b7;
  --si-danger-tint: rgba(248, 113, 113, 0.15);
  --si-danger-text: #fca5a5;
  --si-warning-tint: rgba(251, 191, 36, 0.15);
  --si-warning-text: #fcd34d;
  --si-info-tint: rgba(56, 189, 248, 0.15);
  --si-info-text: #7dd3fc;
  --si-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --si-shadow-md: 0 4px 12px rgba(0, 0, 0, 0.45);
  --si-shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.55);
}

/* --------------------------------------------------------------------------
   2. BASE + ERİŞİLEBİLİRLİK (§10.3 — Kurumsal ölçümlerden)
   -------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: var(--si-font);
  font-size: var(--si-fs-base);
  font-weight: 400;
  line-height: 1.55;
  color: var(--si-text);
  background: var(--si-bg);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--si-font-display);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--si-text);
  margin: 0;
}
h1 { font-size: var(--si-fs-2xl); }
h2 { font-size: var(--si-fs-xl); }
h3 { font-size: var(--si-fs-lg); }

p { margin: 0 0 var(--si-space-3); }
a { color: var(--si-text); text-decoration: none; }
a:hover { text-decoration: underline; }

:focus-visible {
  outline: 2px solid var(--si-accent);
  outline-offset: 2px;
  border-radius: 3px;
}

.si-sr-only {
  position: absolute; width: 1px; height: 1px;
  margin: -1px; padding: 0; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

.si-skip-link {
  position: absolute; left: var(--si-space-3); top: -48px; z-index: 150;
  background: var(--si-primary); color: #fff; font-weight: 500;
  padding: 8px 14px; border-radius: 0 0 var(--si-radius-sm) var(--si-radius-sm);
  transition: top var(--si-transition);
}
.si-skip-link:focus { top: 0; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Form alanlari 16px — iOS odak zoom bug'i + WCAG (Kurumsal ölçü) */
input, select, textarea { font-family: inherit; font-size: 16px; }

/* Dokunma hedefi (coarse pointer'da 44px — WCAG 2.5.5) */
@media (pointer: coarse) {
  .si-btn, .si-rail__item, .si-chip--btn { min-height: 44px; }
}

/* --------------------------------------------------------------------------
   3. BİLEŞENLER (§6 — Kurumsal desenler, si- tokenlariyla)
   -------------------------------------------------------------------------- */

/* --- Buton --- */
.si-btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: var(--si-space-2);
  min-height: 38px; padding: 0 14px;
  font-family: var(--si-font); font-size: 13px; font-weight: 500;
  border-radius: var(--si-radius-sm); border: 1px solid transparent;
  cursor: pointer; text-decoration: none;
  transition: background var(--si-transition), border-color var(--si-transition),
              color var(--si-transition), box-shadow var(--si-transition);
  white-space: nowrap;
}
.si-btn:hover { text-decoration: none; }
.si-btn--primary { background: #0f172a; color: #fff; }
.si-btn--primary:hover { background: #1e293b; }
.si-btn--cta { background: var(--si-accent); color: #fff; }
.si-btn--cta:hover { background: var(--si-accent-dark); }
.si-btn--secondary { background: #ffffff; color: #334155; border-color: var(--si-border-strong); }
.si-btn--secondary:hover { background: var(--si-surface-2); color: #0f172a; }
.si-btn--ghost { background: transparent; color: #334155; }
.si-btn--ghost:hover { background: var(--si-surface-2); color: #0f172a; }
.si-btn--outline { background: #ffffff; color: #334155; border-color: var(--si-border-strong); }
.si-btn--outline:hover { background: var(--si-surface-2); color: #0f172a; }
.si-btn--danger { background: var(--si-danger); color: #fff; }
.si-btn--danger:hover { filter: brightness(0.92); }
.si-btn--icon { min-width: 36px; padding: 0 8px; }
.si-btn--sm { min-height: 32px; padding: 0 11px; font-size: 12.5px; }
.si-btn--lg { min-height: 44px; padding: 0 22px; font-size: 14px; }
.si-btn:disabled, .si-btn[aria-disabled="true"] { opacity: 0.55; cursor: not-allowed; }

/* --- Kart / KPI --- */
.si-card {
  background: var(--si-surface);
  border: 1px solid var(--si-border);
  border-radius: var(--si-radius-md);
  padding: var(--si-space-4) var(--si-space-5);
  box-shadow: var(--si-shadow-sm);
}
.si-kpi__head {
  display: flex; align-items: center; gap: var(--si-space-2);
  margin-bottom: var(--si-space-2);
}
.si-kpi__icon { width: 13px; height: 13px; color: var(--si-text-muted); flex-shrink: 0; }
.si-kpi__label { font-size: 12px; font-weight: 500; color: var(--si-text-secondary); }
.si-kpi__value {
  font-family: var(--si-font-display);
  font-variant-numeric: tabular-nums;
  font-size: var(--si-fs-xl); font-weight: 600;
  color: var(--si-text); line-height: 1.2;
}
.si-kpi__note { font-size: var(--si-fs-xs); color: var(--si-text-muted); margin-top: var(--si-space-1); }
.si-kpi__note--pos { color: var(--si-success); }
.si-kpi__note--neg { color: var(--si-danger); }

/* --- Tablo --- */
.si-table-wrap {
  background: var(--si-surface);
  border: 1px solid var(--si-border);
  border-radius: var(--si-radius-md);
  overflow-x: auto;
}
.si-table { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; }
.si-table th {
  text-align: left; text-transform: uppercase;
  font-size: 11.5px; font-weight: 500; letter-spacing: 0.03em; color: var(--si-text-secondary);
  padding: 10px 14px; border-bottom: 1px solid var(--si-border);
  background: var(--si-surface-2); white-space: nowrap;
}
.si-table td {
  font-size: var(--si-fs-base); font-weight: 400; color: var(--si-text);
  padding: 11px 14px; border-bottom: 1px solid #f1f5f9;
  vertical-align: middle;
}
.dark .si-table td { border-bottom-color: var(--si-border); }
.si-table tbody tr { transition: background var(--si-transition); }
.si-table tbody tr:hover { background: var(--si-surface-2); }
.si-table tbody tr:last-child td { border-bottom: 0; }

/* --- Chip / durum rozeti --- */
.si-chip {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: var(--si-fs-sm); font-weight: 500;
  padding: 3px 9px; border-radius: var(--si-radius-sm);
  background: var(--si-surface-2); color: var(--si-text-secondary);
  border: 1px solid var(--si-border); white-space: nowrap;
}
.si-chip--success { background: #f0fdf4; color: #065f46; border-color: #bbf7d0; }
.si-chip--danger  { background: #fef2f2; color: #991b1b; border-color: #fecaca; }
.si-chip--warning { background: #fffbeb; color: #92400e; border-color: #fde68a; }
.si-chip--info    { background: #f8fafc; color: #334155; border-color: #cbd5e1; }

/* --- Durum pill'i (ust serit) --- */
.si-pill { display: flex; align-items: center; gap: var(--si-space-2); }
.si-pill__icon { width: 13px; height: 13px; color: var(--si-text-muted); flex-shrink: 0; }
.si-pill__label { font-size: var(--si-fs-base); color: var(--si-text-secondary); }
.si-pill__value { font-size: var(--si-fs-base); font-weight: 600; color: var(--si-text); font-variant-numeric: tabular-nums; }

/* --- Form --- */
.si-field { display: flex; flex-direction: column; gap: 5px; }
.si-field__label { font-size: var(--si-fs-sm); font-weight: 500; color: var(--si-text-secondary); }
.si-input, .si-select {
  height: 38px; padding: 0 12px;
  font-size: var(--si-fs-base); font-weight: 400; color: var(--si-text);
  background: var(--si-surface);
  border: 1px solid var(--si-border-strong);
  border-radius: var(--si-radius-sm);
  transition: border-color var(--si-transition), box-shadow var(--si-transition);
}
.si-input:focus, .si-select:focus {
  outline: none; border-color: var(--si-text);
  box-shadow: 0 0 0 3px var(--si-primary-tint);
}
.si-input::placeholder { color: var(--si-text-faint); }
.si-filterbar {
  display: flex; flex-wrap: wrap; align-items: flex-end;
  gap: var(--si-space-3); margin-bottom: var(--si-space-4);
}

/* --- Bos durum --- */
.si-empty {
  text-align: center; padding: var(--si-space-6) var(--si-space-4);
  font-size: var(--si-fs-base); color: var(--si-text-muted);
}

/* --- Avatar --- */
.si-avatar {
  display: inline-flex; align-items: center; justify-content: center;
  width: 32px; height: 32px; border-radius: 50%;
  background: #f1f5f9; color: #0f172a; border: 1px solid var(--si-border);
  font-size: var(--si-fs-sm); font-weight: 600; flex-shrink: 0;
}

/* --------------------------------------------------------------------------
   4. KABUK (§3 — ikon rayi + ust serit + icerik)
   -------------------------------------------------------------------------- */
.si-shell {
  display: grid;
  grid-template-columns: var(--si-rail-width) 1fr;
  min-height: 100vh;
}
.si-rail {
  grid-row: 1;
  position: sticky; top: 0; height: 100vh; z-index: var(--si-z-rail);
  display: flex; flex-direction: column;
  background: var(--si-surface);
  border-right: 1px solid var(--si-border);
  overflow: hidden auto;
  transition: width var(--si-transition);
}
.si-brand {
  height: var(--si-topbar-height);
  display: flex; align-items: center; gap: var(--si-space-2);
  padding: 0 var(--si-space-3);
  background: #ffffff;
  border-bottom: 1px solid var(--si-border);
  color: var(--si-text); flex-shrink: 0;
}
.si-brand__name { font-family: var(--si-font-display); font-weight: 600; font-size: 13px; letter-spacing: -0.01em; }
.si-rail__list { list-style: none; margin: var(--si-space-3) 0; padding: 0 var(--si-space-2); display: flex; flex-direction: column; gap: 2px; }
.si-rail__item {
  display: flex; align-items: center; gap: var(--si-space-3);
  padding: 9px 10px; border-radius: var(--si-radius-sm);
  color: var(--si-text-secondary); font-size: 13px; font-weight: 500;
  cursor: pointer; border: 0; background: transparent; width: 100%;
  text-align: left; text-decoration: none;
  transition: background var(--si-transition), color var(--si-transition);
}
.si-rail__item:hover { background: var(--si-surface-2); color: var(--si-text); text-decoration: none; }
.si-rail__item.is-active { background: var(--si-surface-2); color: var(--si-text); font-weight: 600; }
.si-rail__item svg, .si-rail__item .si-icon { width: 20px; height: 20px; flex-shrink: 0; }
.si-rail__label { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.si-rail__spacer { flex: 1; }

/* Rayi kapaliyken etiketleri gizle (varsayilan) */
.si-shell:not(.si-shell--nav) .si-rail__label { display: none; }
.si-shell:not(.si-shell--nav) .si-rail { width: var(--si-rail-width); }
.si-shell--nav { grid-template-columns: var(--si-rail-width-open) 1fr; }
.si-shell--nav .si-rail { width: var(--si-rail-width-open); }

.si-main { display: flex; flex-direction: column; min-width: 0; background: var(--si-bg); }
.si-topbar {
  position: sticky; top: 0; z-index: var(--si-z-topbar);
  min-height: var(--si-topbar-height);
  display: flex; align-items: center; gap: var(--si-space-4);
  padding: var(--si-space-2) var(--si-space-5);
  background: var(--si-surface);
  border-bottom: 1px solid var(--si-border);
  flex-wrap: wrap;
}
.si-topbar__strip { display: flex; align-items: center; gap: var(--si-space-5); flex-wrap: wrap; }
.si-topbar__actions { margin-left: auto; display: flex; align-items: center; gap: var(--si-space-3); }
.si-page { padding: var(--si-space-5); }
.si-page__title { margin-bottom: var(--si-space-4); }

/* FAB — tek yesil aksan */
.si-fab {
  display: inline-flex; align-items: center; gap: var(--si-space-2);
  margin: var(--si-space-3);
  padding: 10px 14px; border: 0; border-radius: var(--si-radius-md);
  background: var(--si-accent); color: #fff;
  font-size: 13px; font-weight: 500; cursor: pointer;
  box-shadow: var(--si-shadow-md);
  transition: background var(--si-transition), transform var(--si-transition);
}
.si-fab:hover { background: var(--si-accent-dark); transform: translateY(-1px); }

/* --------------------------------------------------------------------------
   5. GRID YARDIMCILARI (§2 olculeri)
   -------------------------------------------------------------------------- */
.si-grid { display: grid; gap: var(--si-space-4); }
.si-grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.si-grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.si-grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.si-grid--auto { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.si-split { display: grid; grid-template-columns: 350px minmax(0, 1fr); gap: var(--si-space-4); }
.si-split--wide { grid-template-columns: 400px minmax(0, 1fr); }

/* --------------------------------------------------------------------------
   6. RESPONSIVE (Tüm ekranlarda @media; mobil zorunlu)
   -------------------------------------------------------------------------- */
@media (max-width: 1200px) {
  .si-grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .si-split, .si-split--wide { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .si-shell, .si-shell--nav { grid-template-columns: 1fr; }
  .si-rail {
    position: fixed; left: 0; top: 0; bottom: 0;
    transform: translateX(-100%);
    transition: transform var(--si-transition);
    box-shadow: var(--si-shadow-lg);
  }
  .si-shell:not(.si-shell--nav) .si-rail,
  .si-shell--nav .si-rail { width: var(--si-rail-width-open); }
  .si-shell--nav .si-rail { transform: translateX(0); }
  .si-shell:not(.si-shell--nav) .si-rail__label { display: inline; }
  .si-grid--2, .si-grid--3, .si-grid--4 { grid-template-columns: 1fr; }
  .si-page { padding: var(--si-space-4); }
  .si-topbar { padding: var(--si-space-2) var(--si-space-4); }
}

/* --------------------------------------------------------------------------
   7. BASKA YÜZEYLER (toast/modal kancalari — ilgili sayfa kurar)
   -------------------------------------------------------------------------- */
.si-toast {
  position: fixed; bottom: var(--si-space-5); right: var(--si-space-5);
  z-index: var(--si-z-toast);
  padding: 12px 16px; border-radius: var(--si-radius-md);
  background: var(--si-text); color: var(--si-bg);
  font-size: 13px; font-weight: 500;
  box-shadow: var(--si-shadow-lg);
}