/* Centralized Layout CSS for consistent page structure */

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

/* Root Variables - Light Theme (Default) */
:root {
    /* Brand Colors */
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --accent-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;

    /* Background Colors */
    --background-body: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    --background-primary: #ffffff;
    --background-secondary: #f8fafc;
    --background-tertiary: #f1f5f9;
    --background-hover: #f8fafc;
    --background-active: #f1f5f9;

    /* Text Colors */
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --text-inverse: #ffffff;
    --text-on-primary: #ffffff;

    /* Border Colors */
    --border-primary: #e2e8f0;
    --border-secondary: #cbd5e1;
    --border-light: #f1f5f9;

    /* Interactive States */
    --link-color: #2563eb;
    --link-hover: #1d4ed8;

    /* Shadows */
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-nav: 0 1px 3px rgba(0, 0, 0, 0.05);
    --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-card-hover: 0 8px 20px rgba(0, 0, 0, 0.15);
    --shadow-button: 0 4px 12px rgba(37, 99, 235, 0.3);
    --shadow-button-hover: 0 6px 16px rgba(37, 99, 235, 0.5);

    /* Special Elements */
    --gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-avatar: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-accent: linear-gradient(135deg, #10b981 0%, #059669 100%);
    --overlay-dark: rgba(0, 0, 0, 0.7);
    --overlay-medium: rgba(0, 0, 0, 0.5);
    --overlay-light: rgba(0, 0, 0, 0.1);
    --backdrop-blur: rgba(255, 255, 255, 0.95);
    --backdrop-translucent: rgba(255, 255, 255, 0.2);

    /* Admin/Special Colors */
    --admin-color: #f59e0b;
    --success-bg: #f0fdf4;
    --info-bg: #eff6ff;
    --warning-bg: #fffbeb;
    --danger-bg: #fef2f2;
}

/* Dark Theme */
html[data-theme='dark'] {
    /* Brand Colors - Slightly adjusted for dark mode */
    --primary-color: #3b82f6;
    --primary-hover: #60a5fa;
    --accent-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;

    /* Background Colors */
    --background-body: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    --background-primary: #1e293b;
    --background-secondary: #334155;
    --background-tertiary: #475569;
    --background-hover: #334155;
    --background-active: #475569;

    /* Text Colors */
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --text-inverse: #0f172a;
    --text-on-primary: #ffffff;

    /* Border Colors */
    --border-primary: #334155;
    --border-secondary: #475569;
    --border-light: #334155;

    /* Interactive States */
    --link-color: #60a5fa;
    --link-hover: #93c5fd;

    /* Shadows - Darker and more subtle for dark mode */
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.3), 0 1px 2px 0 rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 10px 10px -5px rgba(0, 0, 0, 0.4);
    --shadow-nav: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-card-hover: 0 8px 20px rgba(0, 0, 0, 0.4);
    --shadow-button: 0 4px 12px rgba(59, 130, 246, 0.3);
    --shadow-button-hover: 0 6px 16px rgba(59, 130, 246, 0.5);

    /* Special Elements */
    --gradient-hero: linear-gradient(135deg, #4338ca 0%, #6366f1 100%);
    --gradient-avatar: linear-gradient(135deg, #4338ca 0%, #6366f1 100%);
    --gradient-primary: linear-gradient(135deg, #4338ca 0%, #6366f1 100%);
    --gradient-accent: linear-gradient(135deg, #10b981 0%, #059669 100%);
    --overlay-dark: rgba(0, 0, 0, 0.85);
    --overlay-medium: rgba(0, 0, 0, 0.6);
    --overlay-light: rgba(0, 0, 0, 0.2);
    --backdrop-blur: rgba(30, 41, 59, 0.95);
    --backdrop-translucent: rgba(30, 41, 59, 0.3);

    /* Admin/Special Colors */
    --admin-color: #fbbf24;
    --success-bg: #064e3b;
    --info-bg: #1e3a8a;
    --warning-bg: #78350f;
    --danger-bg: #7f1d1d;
}

/* HTML and Body - Sticky Footer Setup */
html {
    height: 100%;
}

body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--background-body);
    background-attachment: fixed; /* Prevents gradient from repeating on scroll */
    color: var(--text-primary);
    margin: 0;
    line-height: 1.6;
    transition: background 0.3s ease, color 0.3s ease;
}

/* Main Page Container - Consistent width across all pages */
.page-container,
.container,
.main-container,
.admin-container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

/* For pages with grid layout (index, favorites) */
.main-container {
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: 2rem;
    padding: 2rem 1.5rem;
}

/* Responsive adjustments */
@media (max-width: 1024px) {
    .main-container {
        grid-template-columns: 1fr;
        padding: 1.5rem 1rem;
    }

    .page-container,
    .container,
    .admin-container {
        padding: 1.5rem 1rem;
    }
}

@media (max-width: 768px) {
    .page-container,
    .container,
    .main-container,
    .admin-container {
        padding: 1rem;
    }
}