/* ============================================
   BrutallyHonest.io Theme System
   OpenAI-Inspired Minimal Design with Tokenization
   ============================================ */

:root {
  /* Color Tokens - Linear Dark Theme */
  --color-primary: #5E6AD2;
  --color-primary-hover: #4C5FD5;
  --color-primary-light: rgba(94, 106, 210, 0.1);
  
  /* Color Tokens - Dark Backgrounds (Linear Style) */
  --color-bg-primary: #0D0D0D;
  --color-bg-secondary: #151515;
  --color-bg-tertiary: #1A1A1A;
  --color-text-primary: #FFFFFF;
  --color-text-secondary: #9CA3AF;
  --color-text-tertiary: #6B7280;
  
  /* Color Tokens - Accent */
  --color-accent: #5E6AD2;
  --color-accent-hover: #4C5FD5;
  
  /* Color Tokens - Semantic */
  --color-success: #10B981;
  --color-warning: #F59E0B;
  --color-error: #EF4444;
  --color-info: #3B82F6;
  
  /* Typography Tokens - Inter Font Only */
  --font-display: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, monospace;
  
  /* Font Size Tokens */
  --text-xs: 0.75rem;      /* 12px */
  --text-sm: 0.875rem;     /* 14px */
  --text-base: 1rem;       /* 16px */
  --text-lg: 1.125rem;     /* 18px */
  --text-xl: 1.25rem;      /* 20px */
  --text-2xl: 1.5rem;      /* 24px */
  --text-3xl: 1.875rem;    /* 30px */
  --text-4xl: 2.25rem;     /* 36px */
  --text-5xl: 3rem;        /* 48px */
  --text-6xl: 3.75rem;     /* 60px */
  
  /* Spacing Tokens */
  --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 */
  
  /* Border Tokens */
  --radius-sm: 0.25rem;    /* 4px */
  --radius-base: 0.5rem;   /* 8px */
  --radius-lg: 0.75rem;    /* 12px */
  --radius-xl: 1rem;       /* 16px */
  --radius-2xl: 1.5rem;    /* 24px */
  --radius-full: 9999px;
  
  --border-width: 1px;
  --border-color: rgba(255, 255, 255, 0.08);
  
  /* Shadow Tokens - Subtle Linear Style */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-base: 0 1px 3px 0 rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 12px 0 rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 24px 0 rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 16px 48px 0 rgba(0, 0, 0, 0.6);
  
  /* Transition Tokens */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Layout Tokens */
  --max-width-sm: 640px;
  --max-width-md: 768px;
  --max-width-lg: 1024px;
  --max-width-xl: 1280px;
  --max-width-2xl: 1536px;
}

/* Dark mode tokens (optional for future) */
@media (prefers-color-scheme: dark) {
  :root {
    --color-bg-primary: #1a1a1a;
    --color-bg-secondary: #2d2d2d;
    --color-bg-tertiary: #3d3d3d;
    --color-text-primary: #ececf1;
    --color-text-secondary: #c5c5d2;
    --color-text-tertiary: #9b9ba8;
    --border-color: #4d4d4d;
  }
}

/* ============================================
   Global Styles
   ============================================ */

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Selection color */
::selection {
  background-color: var(--color-primary);
  color: var(--color-bg-primary);
}

/* ============================================
   Typography
   ============================================ */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.1;
  margin-bottom: var(--space-4);
  letter-spacing: -0.02em;
}

h1 { font-size: var(--text-5xl); font-weight: 600; }
h2 { font-size: var(--text-4xl); font-weight: 600; }
h3 { font-size: var(--text-3xl); font-weight: 600; }
h4 { font-size: var(--text-2xl); font-weight: 600; }
h5 { font-size: var(--text-xl); font-weight: 600; }
h6 { font-size: var(--text-lg); font-weight: 600; }

p {
  margin-bottom: var(--space-4);
}

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

a:hover {
  color: var(--color-accent-hover);
}

/* ============================================
   Button Components (Tokenized)
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: -0.01em;
  border: none;
  border-radius: 24px;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background-color: #FFFFFF;
  color: #0D0D0D;
}

.btn-primary:hover {
  background-color: rgba(255, 255, 255, 0.9);
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: rgba(255, 255, 255, 0.1);
  color: #FFFFFF;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-accent {
  background-color: var(--color-accent);
  color: white;
  box-shadow: var(--shadow-sm);
}

.btn-accent:hover {
  background-color: var(--color-accent-hover);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.btn-lg {
  padding: 12px 28px;
  font-size: 15px;
}

.btn-sm {
  padding: 8px 16px;
  font-size: 13px;
}

/* ============================================
   Layout Components
   ============================================ */

.container {
  width: 100%;
  max-width: var(--max-width-xl);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.section {
  padding: var(--space-20) 0;
}

.section-sm {
  padding: var(--space-12) 0;
}

.section-lg {
  padding: var(--space-24) 0;
}

/* ============================================
   Card Component
   ============================================ */

.card {
  background-color: var(--color-bg-primary);
  border: var(--border-width) solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

/* ============================================
   Form Components
   ============================================ */

.form-group {
  margin-bottom: var(--space-6);
}

.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-base);
  font-family: var(--font-primary);
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  border: var(--border-width) solid var(--border-color);
  border-radius: var(--radius-base);
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

.form-checkbox {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.form-checkbox input[type="checkbox"] {
  width: 18px;
  height: 18px;
  cursor: pointer;
}

/* ============================================
   Utility Classes
   ============================================ */

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-primary { color: var(--color-text-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-tertiary { color: var(--color-text-tertiary); }

.bg-primary { background-color: var(--color-bg-primary); }
.bg-secondary { background-color: var(--color-bg-secondary); }

.mt-4 { margin-top: var(--space-4); }
.mb-4 { margin-bottom: var(--space-4); }
.my-4 { margin-top: var(--space-4); margin-bottom: var(--space-4); }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }

/* ============================================
   Responsive Utilities
   ============================================ */

@media (max-width: 768px) {
  h1 { font-size: var(--text-4xl); }
  h2 { font-size: var(--text-3xl); }
  h3 { font-size: var(--text-2xl); }
  
  .section {
    padding: var(--space-12) 0;
  }
  
  .container {
    padding: 0 var(--space-4);
  }
}