/* ===========================
   MAIN.CSS - Global Theme & Base Styles
   Cross-page theme, colors, typography, and layout
   =========================== */

/* Font Import */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

/* ===========================
   CSS VARIABLES (THEME)
   =========================== */
:root {
    /* Colors - Primary */
    --color-primary: #ef4444;
    --color-primary-dark: #dc2626;
    --color-primary-light: #f87171;
    
    /* Colors - Status */
    --color-success: #10b981;
    --color-success-light: #d1fae5;
    --color-success-dark: #065f46;
    --color-error: #ef4444;
    --color-error-light: #fee2e2;
    --color-error-dark: #991b1b;
    --color-warning: #f59e0b;
    --color-warning-light: #fed7aa;
    
    /* Colors - Neutral */
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;
    
    /* Colors - Accent */
    --color-purple: #a855f7;
    --color-purple-light: #e9d5ff;
    --color-orange: #f97316;
    --color-orange-light: #fed7aa;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
    
    /* Typography */
    --font-family: 'Inter', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2rem;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.2s ease;
    --transition-slow: 0.3s ease;
}

/* ===========================
   RESET & BASE STYLES
   =========================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    background: linear-gradient(to bottom right, var(--color-gray-50), var(--color-gray-100));
    min-height: 100vh;
    color: var(--color-gray-900);
    line-height: 1.5;
}

/* ===========================
   TYPOGRAPHY
   =========================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-gray-900);
}

h1 { font-size: var(--font-size-3xl); }
h2 { font-size: var(--font-size-2xl); }
h3 { font-size: var(--font-size-xl); }
h4 { font-size: var(--font-size-lg); }

p {
    line-height: 1.6;
}

/* ===========================
   LAYOUT
   =========================== */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

.container-sm {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

/* ===========================
   HEADER (Global)
   =========================== */
header {
    background: white;
    box-shadow: var(--shadow-sm);
    border-bottom: 1px solid var(--color-gray-200);
}

.header-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: var(--spacing-lg) var(--spacing-xl);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.header-icon {
    background: var(--color-primary);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.subtitle {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
}

/* ===========================
   MAIN CONTENT
   =========================== */
main {
    max-width: 1280px;
    margin: 0 auto;
    padding: var(--spacing-2xl) var(--spacing-xl);
}

/* ===========================
   UTILITY CLASSES
   =========================== */
.hidden {
    display: none !important;
}

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

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

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

/* ===========================
   RESPONSIVE BREAKPOINTS
   =========================== */
@media (max-width: 1024px) {
    :root {
        --font-size-3xl: 1.5rem;
        --font-size-2xl: 1.25rem;
    }
}

@media (max-width: 768px) {
    .header-container {
        padding: var(--spacing-md);
    }
    
    main {
        padding: var(--spacing-xl) var(--spacing-md);
    }
    
    .container {
        padding: 0 var(--spacing-md);
    }
}

@media (max-width: 480px) {
    :root {
        --font-size-3xl: 1.25rem;
        --font-size-2xl: 1.125rem;
    }
}