/* =========================================
   CSS Custom Properties (Variables)
   ========================================= */
   :root {
    /* Colors */
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-primary-light: #3b82f6;
    --color-danger: #ef4444;
    --color-danger-dark: #dc2626;
    --color-success: #22c55e;
    --color-success-light: rgba(34, 197, 94, 0.2);
    
    /* Text Colors */
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-light: #94a3b8;
    
    /* Background Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8faff;
    --bg-gradient: linear-gradient(145deg, #f8faff 0%, #ffffff 100%);
    --bg-hover: #f1f5f9;
    
    /* Border Colors */
    --border-primary: #e2e8f0;
    --border-focus: #2563eb;
    
    /* Layout Heights */
    --header-height: 60px;
    --context-height: 80px;
    --auth-card-width: 24rem;
    --auth-header-height: 4rem;
    --auth-progress-height: 4px;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    
    /* Font Sizes */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 2rem;
    --text-4xl: 3rem;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px -1px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 12px 20px -8px rgba(37, 99, 235, 0.2);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    
    /* Transitions */
    --transition-base: all 0.2s ease;
    --transition-smooth: all 0.3s ease-in-out;
    --transition-bounce: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* =========================================
   Reset & Base Styles
   ========================================= */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    height: 100%;
    /* Prevent zooming and horizontal scroll on mobile */
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-gradient);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    /* Prevent horizontal scroll */
    overflow-x: hidden;
    width: 100%;
    position: relative;
}

/* =========================================
   Typography
   ========================================= */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--space-md);
}

h1 {
    font-size: var(--text-4xl);
    background: linear-gradient(135deg, var(--text-primary) 0%, #334155 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: var(--space-md);
    font-weight: 800;
}

h2 {
    font-size: var(--text-3xl);
    color: var(--text-primary);
}

h3 {
    font-size: var(--text-2xl);
    color: var(--text-primary);
}

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

/* =========================================
   Layout Containers
   ========================================= */
.content-container {
    max-width: 1000px;
    margin: var(--space-2xl) auto var(--space-lg);
    padding: 0 var(--space-xl);
    text-align: center;
    width: 100%;
}

.container {
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
    padding: var(--space-lg);
}

/* Auth specific container */
.auth-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-md);
}

/* =========================================
   Utility Classes
   ========================================= */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-light { color: var(--text-light); }

/* Flex utilities */
.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-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }

.subtitle {
    font-size: var(--text-lg);
    color: var(--text-secondary);
    margin-bottom: var(--space-2xl);
}

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

/* Gradient text utility */
.gradient-text {
    background: linear-gradient(to right, var(--color-primary-dark), var(--color-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* =========================================
   Media Queries
   ========================================= */
@media (max-width: 768px) {
    :root {
        /* Adjust spacing for mobile */
        --space-2xl: 2rem;
        --header-height: 50px;
        --context-height: 160px;
        --auth-card-width: 100%;
    }
    
    .content-container {
        padding: 0 var(--space-md);
        margin-top: var(--space-lg);
    }
    
    h1 {
        font-size: var(--text-3xl);
    }
    
    /* Ensure proper width constraints on mobile */
    * {
        max-width: 100vw;
    }
}

/* =========================================
   Print Styles
   ========================================= */
@media print {
    body {
        background: none;
    }
    
    .content-container {
        margin: 0;
        padding: 0;
    }
}