/* ==========================================================================
   ToolHub — Tasarım Token'ları (tek kaynak)
   ui-ux-pro-max skill kurallarına göre: açık tema, kontrollü vurgu renkleri,
   4px tabanlı spacing, akışkan tipografi ölçeği.
   ========================================================================== */
:root {
  /* Zemin */
  --c-bg: #ffffff;
  --c-bg-soft: #f6f8fc;
  --c-bg-raised: #ffffff;
  --c-surface: #ffffff;
  --c-border: #e4e9f2;
  --c-border-strong: #cbd5e8;

  /* Metin */
  --c-text: #101828;
  --c-text-muted: #475467;
  --c-text-faint: #98a2b3;
  --c-text-on-accent: #ffffff;

  /* Vurgu */
  --c-blue: #2563eb;
  --c-blue-dark: #1d4ed8;
  --c-blue-soft: #eaf1ff;
  --c-purple: #7c3aed;
  --c-purple-soft: #f3ecff;
  --c-teal: #0891b2;
  --c-teal-soft: #e6f7fb;

  --c-success: #17825a;
  --c-success-soft: #e5f7ef;
  --c-warning: #b45309;
  --c-warning-soft: #fef3e2;
  --c-danger: #d92d20;
  --c-danger-soft: #fef2f1;

  --gradient-brand: linear-gradient(135deg, var(--c-blue) 0%, var(--c-purple) 100%);
  --gradient-glow: radial-gradient(60% 60% at 50% 0%, rgba(37,99,235,0.14) 0%, rgba(124,58,237,0.06) 55%, transparent 100%);

  /* Gölgeler */
  --shadow-xs: 0 1px 2px rgba(16,24,40,0.05);
  --shadow-sm: 0 1px 3px rgba(16,24,40,0.08), 0 1px 2px rgba(16,24,40,0.04);
  --shadow-md: 0 4px 12px rgba(16,24,40,0.08), 0 2px 4px rgba(16,24,40,0.04);
  --shadow-lg: 0 12px 32px rgba(16,24,40,0.12), 0 4px 8px rgba(16,24,40,0.04);
  --shadow-glow: 0 8px 30px rgba(37,99,235,0.18);

  /* Radius */
  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 16px;
  --r-xl: 24px;
  --r-full: 999px;

  /* Spacing (4px tabanlı) */
  --sp-1: 4px;  --sp-2: 8px;  --sp-3: 12px; --sp-4: 16px;
  --sp-5: 24px; --sp-6: 32px; --sp-7: 48px; --sp-8: 64px; --sp-9: 96px;

  /* Tipografi — akışkan ölçek */
  --fs-xs: clamp(0.75rem, 0.72rem + 0.1vw, 0.8rem);
  --fs-sm: clamp(0.875rem, 0.85rem + 0.1vw, 0.925rem);
  --fs-base: clamp(1rem, 0.97rem + 0.15vw, 1.05rem);
  --fs-lg: clamp(1.125rem, 1.08rem + 0.2vw, 1.25rem);
  --fs-xl: clamp(1.25rem, 1.18rem + 0.3vw, 1.5rem);
  --fs-2xl: clamp(1.5rem, 1.35rem + 0.6vw, 1.875rem);
  --fs-3xl: clamp(1.875rem, 1.6rem + 1vw, 2.375rem);
  --fs-4xl: clamp(2.25rem, 1.85rem + 1.6vw, 3rem);
  --fs-5xl: clamp(2.75rem, 2.1rem + 2.4vw, 3.75rem);

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, "Helvetica Neue", Arial, sans-serif;
  --lh-tight: 1.2;
  --lh-normal: 1.55;

  /* Geçiş */
  --ease-out: cubic-bezier(.22,1,.36,1);
  --dur-fast: 140ms;
  --dur-base: 240ms;
  --dur-slow: 380ms;

  /* Layout */
  --container-max: 1280px;
  --header-h: 72px;

  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --c-bg: #0b1220;
    --c-bg-soft: #101a2c;
    --c-bg-raised: #131d30;
    --c-surface: #131d30;
    --c-border: #22304a;
    --c-border-strong: #2e3f5e;
    --c-text: #eef2f9;
    --c-text-muted: #a6b2c8;
    --c-text-faint: #6b7a97;
    --c-blue-soft: #16233d;
    --c-purple-soft: #221c3c;
    --c-teal-soft: #102431;
    --c-success-soft: #0f2a20;
    --c-warning-soft: #2b2110;
    --c-danger-soft: #2c1414;
    --shadow-glow: 0 8px 34px rgba(37,99,235,0.35);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --c-bg: #0b1220;
  --c-bg-soft: #101a2c;
  --c-bg-raised: #131d30;
  --c-surface: #131d30;
  --c-border: #22304a;
  --c-border-strong: #2e3f5e;
  --c-text: #eef2f9;
  --c-text-muted: #a6b2c8;
  --c-text-faint: #6b7a97;
  color-scheme: dark;
}