/* CSS Variables matching theme */
:root {
    --primary-gradient: #10b981;
    --secondary-gradient: #34d399;
    --accent-gradient: #6ee7b7;
    --success-gradient: #10b981;
    --warning-gradient: #f59e0b;
    --error-gradient: #ef4444;
    
    --primary-color: #10b981;
    --secondary-color: #059669;
    --accent-color: #34d399;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --info-color: #3b82f6;
    --error-color: #ef4444;
    
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-muted: #9ca3af;
    --text-white: #ffffff;
    
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-tertiary: #f3f4f6;
    
    --border-light: #e5e7eb;
    --border-medium: #d1d5db;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --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);
    
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    --font-family: 'Quicksand', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* Dark mode variables */
[data-theme="dark"] {
    --primary-gradient: #10b981;
    --secondary-gradient: #34d399;
    --accent-gradient: #6ee7b7;
    --success-gradient: #10b981;
    --warning-gradient: #f59e0b;
    --error-gradient: #ef4444;
    
    --primary-color: #10b981;
    --secondary-color: #059669;
    --accent-color: #34d399;
    --success-color: #10b981;
    --warning-color: #fbbf24;
    --info-color: #60a5fa;
    --error-color: #f87171;
    
    --text-primary: #f9fafb;
    --text-secondary: #d1d5db;
    --text-muted: #9ca3af;
    --text-white: #ffffff;
    
    --bg-primary: #111827;
    --bg-secondary: #1f2937;
    --bg-tertiary: #374151;
    
    --border-light: #374151;
    --border-medium: #4b5563;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
    --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, 0.3);
}

/* Dark mode specific overrides */
[data-theme="dark"] .header {
    background: rgba(17, 24, 39, 0.95) !important;
}

[data-theme="dark"] input {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-color: var(--border-medium);
}

[data-theme="dark"] input::placeholder {
    color: var(--text-muted);
}

[data-theme="dark"] select {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-color: var(--border-medium);
}

[data-theme="dark"] textarea {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-color: var(--border-medium);
}

/* Enhanced dark mode styling */
[data-theme="dark"] .modal {
    background: rgba(0, 0, 0, 0.8);
}

[data-theme="dark"] code {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

[data-theme="dark"] pre {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

/* Scrollbar styling for dark mode */
[data-theme="dark"] ::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

[data-theme="dark"] ::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

[data-theme="dark"] ::-webkit-scrollbar-thumb {
    background: var(--border-medium);
    border-radius: 4px;
}

[data-theme="dark"] ::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Dark mode overrides for shopping list components */
[data-theme="dark"] .list-header {
    background: var(--bg-secondary) !important;
}

[data-theme="dark"] .list-card {
    background: var(--bg-primary);
    border-color: var(--border-medium);
}

[data-theme="dark"] .list-name {
    color: var(--text-primary);
}

/* Theme toggle styling */
#theme-toggle {
    transition: transform 0.15s ease !important;
}

#theme-toggle:hover {
    background: var(--bg-secondary) !important;
}

#theme-icon {
    transition: transform 0.3s ease;
}

/* Prevent flash of unstyled content */
html {
    background: #f9fafb; /* Default to light mode background */
    transition: background-color 0.2s ease;
}

html[data-theme="dark"] {
    background: #1f2937 !important;
}

html[data-theme="light"] {
    background: #f9fafb !important;
}

/* Immediate theme application for body */
body {
    background: var(--bg-secondary);
    transition: background-color 0.2s ease, color 0.2s ease;
}

/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    color: var(--text-primary);
    line-height: 1.6;
    background: var(--bg-secondary);
    overflow-x: hidden;
}

/* Page Header */
.page-header {
    margin-bottom: var(--spacing-2xl);
    text-align: center;
    animation: fadeInUp 0.8s ease;
}

.page-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-sm);
}

.page-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

/* Header, Navigation, and Dropdown styles */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-light);
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
    transition: transform 0.3s ease;
}

.logo:hover {
    transform: scale(1.05);
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: var(--primary-gradient);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2rem;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    list-style: none;
}

.nav-link {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    position: relative;
    transition: color 0.3s ease;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
}

.nav-link:hover {
    color: var(--primary-color);
    transform: translateY(-1px);
}

.nav-link.logout {
    background: var(--error-color);
    color: var(--text-white);
}

.nav-link.logout:hover {
    background: #dc2626;
    color: var(--text-white);
}

/* Dropdown Styles */
.nav-dropdown {
    position: relative;
}

.dropdown-toggle {
    display: flex;
    align-items: center;
    cursor: pointer;
}

.dropdown-arrow {
    transition: transform 0.3s ease;
}

.nav-dropdown:hover .dropdown-arrow {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: calc(100% + 6px);
    left: 50%;
    transform: translateX(-50%) translateY(-8px);
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    min-width: 160px;
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s ease;
    z-index: 1000;
    list-style: none;
    padding: var(--spacing-xs) 0;
    margin: 0;
}

.dropdown-menu::before {
    content: '';
    position: absolute;
    top: -4px;
    left: 50%;
    transform: translateX(-50%);
    width: 8px;
    height: 8px;
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-bottom: none;
    border-right: none;
    transform: translateX(-50%) rotate(45deg);
}

.nav-dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.dropdown-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.2s ease;
    border: none;
    background: none;
    font-size: 0.9rem;
}

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

.dropdown-link.logout {
    color: var(--error-color);
}

.dropdown-link.logout:hover {
    background: rgba(239, 68, 68, 0.1);
    color: var(--error-color);
}

.dropdown-link.upgrade-link {
    background: var(--primary-color);
    color: white;
    font-weight: 600;
    border-radius: var(--radius-md);
    margin: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    position: relative;
    overflow: hidden;
}

.dropdown-link.upgrade-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.dropdown-link.upgrade-link:hover::before {
    left: 100%;
}

.dropdown-link.upgrade-link:hover {
    background: var(--secondary-color);
    color: white;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.dropdown-link.upgrade-link i {
    color: #fbbf24;
    font-size: 0.9rem;
}

.dropdown-link i {
    font-size: 0.85rem;
    width: 14px;
    text-align: center;
}

/* Add subtle separators in dropdown */
.dropdown-menu li:not(:last-child) {
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.dropdown-menu li:last-child .dropdown-link {
    border-bottom: none;
}

/* Main Content */
.main-content {
    min-height: 100vh;
    padding: 100px var(--spacing-lg) var(--spacing-xl);
}

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.25rem;
    color: var(--text-primary);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
}

.mobile-menu-btn:hover {
    background: var(--bg-secondary);
    color: var(--primary-color);
}

/* Footer */
.footer {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    padding: var(--spacing-xl) var(--spacing-lg);
    text-align: center;
    margin-top: var(--spacing-2xl);
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.1);
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: rgba(16, 185, 129, 0.3);
}

.footer p {
    color: var(--text-secondary);
    margin: 0;
    font-size: 0.875rem;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}