/* ==========================================================================
   FiTicaret Design System & Core Tokens
   Built by agency-ui-designer & agency-ux-architect
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500;700&family=Space+Grotesk:wght@500;600;700&display=swap');

:root {
  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-display: 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Type Scale */
  --text-xs: 0.75rem;     /* 12px */
  --text-sm: 0.875rem;    /* 14px */
  --text-base: 1rem;      /* 16px */
  --text-md: 1.125rem;    /* 18px */
  --text-lg: 1.25rem;     /* 20px */
  --text-xl: 1.5rem;      /* 24px */
  --text-2xl: 1.875rem;   /* 30px */
  --text-3xl: 2.25rem;    /* 36px */
  --text-4xl: 3rem;       /* 48px */
  --text-5xl: clamp(2.5rem, 6vw, 4.25rem); /* Responsive Hero */

  /* Spacing Scale (4px base) */
  --space-1: 0.25rem;     /* 4px */
  --space-2: 0.5rem;      /* 8px */
  --space-3: 0.75rem;     /* 12px */
  --space-4: 1rem;        /* 16px */
  --space-5: 1.25rem;     /* 20px */
  --space-6: 1.5rem;      /* 24px */
  --space-8: 2rem;        /* 32px */
  --space-10: 2.5rem;     /* 40px */
  --space-12: 3rem;       /* 48px */
  --space-16: 4rem;       /* 64px */
  --space-20: 5rem;       /* 80px */
  --space-24: 6rem;       /* 96px */

  /* Radius */
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Transitions */
  --ease-spring: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-smooth: cubic-bezier(0.2, 0.8, 0.2, 1);
  --transition-fast: 150ms var(--ease-spring);
  --transition-normal: 250ms var(--ease-spring);
  --transition-slow: 450ms var(--ease-spring);

  /* Containers */
  --container-max: 1280px;
  --container-narrow: 1040px;
  --container-pad: 1.5rem;

  /* Z-Index Hierarchy */
  --z-base: 1;
  --z-elevated: 10;
  --z-sticky: 100;
  --z-modal: 500;
  --z-toast: 1000;
}

/* ==========================================================================
   Themes: Default (Cyber Dark), Stealth Obsidian, and Titanium Light
   ========================================================================== */

/* 1. Default: Cyber Dark Theme */
:root,
[data-theme="cyber"] {
  --color-scheme: dark;

  /* Backgrounds */
  --bg-page: #06080F;
  --bg-page-rgb: 6, 8, 15;
  --bg-surface: #0B101D;
  --bg-card: rgba(14, 21, 37, 0.72);
  --bg-card-hover: rgba(19, 29, 52, 0.85);
  --bg-glass: rgba(11, 16, 29, 0.75);
  --bg-glass-input: rgba(18, 26, 44, 0.65);
  --bg-code: #05070D;

  /* Borders */
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-medium: rgba(255, 255, 255, 0.16);
  --border-highlight: rgba(0, 240, 255, 0.4);
  --border-card-glow: rgba(0, 240, 255, 0.18);

  /* Text */
  --text-heading: #F8FAFC;
  --text-body: #CBD5E1;
  --text-muted: #64748B;
  --text-subtle: #475569;

  /* Brand Accents (Aligned with Fi Ticaret Logo) */
  --brand-orange: #FF5722;
  --brand-orange-rgb: 255, 87, 34;
  --brand-coral: #FF7A59;
  --brand-cyan: #00F0FF;
  --brand-cyan-rgb: 0, 240, 255;
  --brand-blue: #3B82F6;
  --brand-blue-rgb: 59, 130, 246;
  --brand-crimson: #FF5722;
  --brand-crimson-rgb: 255, 87, 34;
  --brand-emerald: #10B981;
  --brand-emerald-rgb: 16, 185, 129;
  --brand-purple: #8B5CF6;
  --brand-purple-rgb: 139, 92, 246;
  --brand-amber: #F59E0B;

  /* Primary Button / Highlight Gradient */
  --gradient-brand: linear-gradient(135deg, #FF5722 0%, #F97316 50%, #FF7A59 100%);
  --gradient-cyan: linear-gradient(135deg, #00F0FF 0%, #3B82F6 100%);
  --gradient-cyber: linear-gradient(135deg, #FF5722 0%, #F97316 50%, #00F0FF 100%);
  --gradient-dark-card: linear-gradient(180deg, rgba(20, 28, 48, 0.6) 0%, rgba(10, 15, 26, 0.8) 100%);

  /* Glows and Shadows */
  --glow-brand: 0 0 35px rgba(255, 87, 34, 0.45);
  --glow-cyan: 0 0 35px rgba(0, 240, 255, 0.35);
  --glow-emerald: 0 0 30px rgba(16, 185, 129, 0.3);
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.7);
  --shadow-subtle: 0 4px 20px rgba(0, 0, 0, 0.4);

  /* Grid overlay */
  --grid-line-color: rgba(255, 255, 255, 0.035);
}

/* 2. Stealth Obsidian Theme (Pure Monolith Dark) */
[data-theme="stealth"] {
  --color-scheme: dark;
  --bg-page: #000000;
  --bg-page-rgb: 0, 0, 0;
  --bg-surface: #0A0A0A;
  --bg-card: rgba(18, 18, 18, 0.75);
  --bg-card-hover: rgba(26, 26, 26, 0.85);
  --bg-glass: rgba(10, 10, 10, 0.8);
  --bg-glass-input: rgba(20, 20, 20, 0.7);
  --bg-code: #000000;

  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-medium: rgba(255, 255, 255, 0.16);
  --border-highlight: rgba(16, 185, 129, 0.4);
  --border-card-glow: rgba(255, 255, 255, 0.12);

  --text-heading: #FFFFFF;
  --text-body: #D4D4D8;
  --text-muted: #71717A;
  --text-subtle: #52525B;

  --brand-cyan: #22C55E;
  --brand-cyan-rgb: 34, 197, 94;
  --brand-blue: #60A5FA;
  --brand-blue-rgb: 96, 165, 250;
  --brand-crimson: #E11D48;
  --brand-crimson-rgb: 225, 29, 72;
  --brand-emerald: #10B981;
  --brand-emerald-rgb: 16, 185, 129;

  --gradient-brand: linear-gradient(135deg, #E11D48 0%, #BE123C 100%);
  --gradient-cyan: linear-gradient(135deg, #22C55E 0%, #10B981 100%);
  --glow-brand: 0 0 30px rgba(225, 29, 72, 0.25);
  --glow-cyan: 0 0 30px rgba(34, 197, 94, 0.25);
  --grid-line-color: rgba(255, 255, 255, 0.02);
}

/* 3. Titanium Light Theme (Crisp Enterprise High-Tech) */
[data-theme="light"] {
  --color-scheme: light;
  --bg-page: #F8FAFC;
  --bg-page-rgb: 248, 250, 252;
  --bg-surface: #FFFFFF;
  --bg-card: rgba(255, 255, 255, 0.85);
  --bg-card-hover: rgba(241, 245, 249, 0.95);
  --bg-glass: rgba(255, 255, 255, 0.82);
  --bg-glass-input: #F1F5F9;
  --bg-code: #0F172A;

  --border-subtle: rgba(0, 0, 0, 0.08);
  --border-medium: rgba(0, 0, 0, 0.16);
  --border-highlight: rgba(37, 99, 235, 0.4);
  --border-card-glow: rgba(37, 99, 235, 0.12);

  --text-heading: #0F172A;
  --text-body: #334155;
  --text-muted: #64748B;
  --text-subtle: #94A3B8;

  --brand-cyan: #0284C7;
  --brand-cyan-rgb: 2, 132, 199;
  --brand-blue: #2563EB;
  --brand-blue-rgb: 37, 99, 235;
  --brand-crimson: #E11D48;
  --brand-crimson-rgb: 225, 29, 72;
  --brand-emerald: #059669;
  --brand-emerald-rgb: 5, 150, 105;

  --gradient-brand: linear-gradient(135deg, #E11D48 0%, #EA580C 100%);
  --gradient-cyan: linear-gradient(135deg, #0284C7 0%, #2563EB 100%);
  --glow-brand: 0 4px 20px rgba(225, 29, 72, 0.25);
  --glow-cyan: 0 4px 20px rgba(2, 132, 199, 0.25);
  --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.06);
  --shadow-subtle: 0 2px 10px rgba(0, 0, 0, 0.04);
  --grid-line-color: rgba(0, 0, 0, 0.04);
}

/* ==========================================================================
   CSS Reset & Base Rules
   ========================================================================== */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-page);
  color: var(--text-body);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Accessible focus styling */
:focus-visible {
  outline: 2px solid var(--brand-cyan);
  outline-offset: 3px;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

button {
  font-family: inherit;
  font-size: inherit;
  border: none;
  background: none;
  cursor: pointer;
}

img, svg, video {
  display: block;
  max-width: 100%;
}

input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

/* Selection */
::selection {
  background: rgba(0, 240, 255, 0.25);
  color: var(--text-heading);
}

/* Responsive Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-pad);
  padding-right: var(--container-pad);
}

.container-narrow {
  width: 100%;
  max-width: var(--container-narrow);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-pad);
  padding-right: var(--container-pad);
}