/* ============================================
   THEME SYSTEM - Dark/Light Mode CSS Variables
   ============================================ */

:root {
    /* Light Theme Colors */
    --color-bg-primary: #ffffff;
    --color-bg-secondary: #f5f7fa;
    --color-text-primary: #1a1a1a;
    --color-text-secondary: #666666;
    --color-text-tertiary: #999999;
    --color-border: #e0e0e0;
    --color-border-light: #f0f0f0;
    
    /* Accent Colors - Remain consistent */
    --color-primary: #6366f1;
    --color-primary-hover: #4f46e5;
    --color-primary-light: #e0e7ff;
    --color-secondary: #7c3aed;
    --color-success: #10b981;
    --color-danger: #ef4444;
    --color-warning: #f59e0b;
    --color-info: #3b82f6;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.2);
    
    /* Other Variables */
    --transition-speed: 300ms;
    --font-family-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

/* Dark Mode Variables */
html[data-theme="dark"],
html.dark-mode {
    --color-bg-primary: #1a1a1a;
    --color-bg-secondary: #2d2d2d;
    --color-text-primary: #ffffff;
    --color-text-secondary: #b0b0b0;
    --color-text-tertiary: #808080;
    --color-border: #404040;
    --color-border-light: #2d2d2d;
    
    /* Shadows adjust for dark mode */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.6);
}

/* ============================================
   BASE ELEMENT STYLES
   ============================================ */

body {
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
    font-family: var(--font-family-base);
    transition: background-color var(--transition-speed) ease,
                color var(--transition-speed) ease;
}

a {
    color: var(--color-primary);
    transition: color var(--transition-speed) ease;
}

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

button {
    transition: background-color var(--transition-speed) ease,
                border-color var(--transition-speed) ease,
                color var(--transition-speed) ease;
}

/* ============================================
   COMPONENT STYLES
   ============================================ */

/* Cards and Containers */
.card,
.modal,
.dropdown-menu {
    background-color: var(--color-bg-primary);
    border-color: var(--color-border);
    box-shadow: var(--shadow-md);
    transition: background-color var(--transition-speed) ease,
                border-color var(--transition-speed) ease,
                box-shadow var(--transition-speed) ease;
}

/* Navigation */
/*nav,
.navbar {
    background-color: var(--color-bg-secondary);
    border-bottom-color: var(--color-border);
    box-shadow: var(--shadow-sm);
}*/

.navbar a {
    color: var(--color-text-primary);
}

.navbar a:hover {
    color: var(--color-primary);
}

/* Input Fields */
input,
textarea,
select {
    background-color: var(--color-bg-secondary);
    color: var(--color-text-primary);
    border-color: var(--color-border);
    transition: background-color var(--transition-speed) ease,
                border-color var(--transition-speed) ease,
                color var(--transition-speed) ease;
}

input:focus,
textarea:focus,
select:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-light);
}

/* Buttons */
.btn-primary {
    background-color: var(--color-primary);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    background-color: var(--color-primary-hover);
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: var(--color-secondary);
    color: white;
    border: none;
}

.btn-secondary:hover {
    opacity: 0.9;
}

.btn-outline {
    border: 2px solid var(--color-primary);
    color: var(--color-primary);
    background-color: transparent;
    padding: 8px 18px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-outline:hover {
    background-color: var(--color-primary-light);
}

/* Text Utilities */
.text-muted {
    color: var(--color-text-secondary);
}

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

/* Borders */
.border {
    border-color: var(--color-border);
}

.border-light {
    border-color: var(--color-border-light);
}

/* Backgrounds */
.bg-secondary {
    background-color: var(--color-bg-secondary);
}

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

/* Code Blocks */
code,
pre {
    background-color: var(--color-bg-secondary);
    color: var(--color-text-primary);
    border-color: var(--color-border);
}

/* Tables */
table {
    border-collapse: collapse;
}

table thead {
    background-color: var(--color-bg-secondary);
    border-bottom-color: var(--color-border);
}

table tbody tr {
    border-bottom-color: var(--color-border-light);
}

table tbody tr:hover {
    background-color: var(--color-bg-secondary);
}

/* ============================================
   THEME TOGGLE BUTTON STYLES
   ============================================ */

#theme-toggle,
.theme-toggle-btn {
    position: relative;
    width: 44px;
    height: 44px;
    border: none;
    background: linear-gradient(145deg, #f0f0f0, #e6e6e6);
    border-radius: 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 
        3px 3px 8px rgba(0, 0, 0, 0.1),
        -2px -2px 6px rgba(255, 255, 255, 0.9);
    overflow: hidden;
    outline: none;
}

#theme-toggle:hover,
.theme-toggle-btn:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: 
        4px 4px 12px rgba(0, 0, 0, 0.15),
        -2px -2px 8px rgba(255, 255, 255, 0.95);
}

#theme-toggle:active,
.theme-toggle-btn:active {
    transform: translateY(0) scale(0.98);
}

/* Toggle Icon Container */
.toggle-icon {
    position: relative;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ============================================
   LIGHT MODE - Show Moon, Hide Sun
   ============================================ */

/* Moon Icon - Visible in Light Mode */
#theme-toggle .moon-icon,
.theme-toggle-btn .moon-icon {
    position: absolute;
    font-size: 1.2rem;
    color: #6366f1;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

/* Sun Icon - Hidden in Light Mode */
#theme-toggle .sun-icon,
.theme-toggle-btn .sun-icon {
    position: absolute;
    font-size: 1.3rem;
    color: #fbbf24;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 0;
    transform: rotate(-90deg) scale(0.5);
}

/* ============================================
   DARK MODE - Show Sun, Hide Moon
   ============================================ */

body.dark-theme #theme-toggle,
body.dark-theme .theme-toggle-btn,
html.dark-mode #theme-toggle,
html.dark-mode .theme-toggle-btn,
html[data-theme="dark"] #theme-toggle,
html[data-theme="dark"] .theme-toggle-btn {
    background: linear-gradient(145deg, #2d2d2d, #1f1f1f);
    box-shadow: 
        3px 3px 8px rgba(0, 0, 0, 0.4),
        -2px -2px 6px rgba(60, 60, 60, 0.2);
}

body.dark-theme #theme-toggle:hover,
body.dark-theme .theme-toggle-btn:hover,
html.dark-mode #theme-toggle:hover,
html.dark-mode .theme-toggle-btn:hover,
html[data-theme="dark"] #theme-toggle:hover,
html[data-theme="dark"] .theme-toggle-btn:hover {
    box-shadow: 
        4px 4px 12px rgba(0, 0, 0, 0.5),
        -2px -2px 8px rgba(70, 70, 70, 0.3);
}

/* Dark Mode - Hide Moon */
body.dark-theme #theme-toggle .moon-icon,
body.dark-theme .theme-toggle-btn .moon-icon,
html.dark-mode #theme-toggle .moon-icon,
html.dark-mode .theme-toggle-btn .moon-icon,
html[data-theme="dark"] #theme-toggle .moon-icon,
html[data-theme="dark"] .theme-toggle-btn .moon-icon {
    opacity: 0;
    transform: rotate(90deg) scale(0.5);
}

/* Dark Mode - Show Sun */
body.dark-theme #theme-toggle .sun-icon,
body.dark-theme .theme-toggle-btn .sun-icon,
html.dark-mode #theme-toggle .sun-icon,
html.dark-mode .theme-toggle-btn .sun-icon,
html[data-theme="dark"] #theme-toggle .sun-icon,
html[data-theme="dark"] .theme-toggle-btn .sun-icon {
    opacity: 1;
    transform: rotate(0deg) scale(1);
    filter: drop-shadow(0 0 6px rgba(251, 191, 36, 0.5));
}

/* ============================================
   SINGLE ICON FALLBACK (Legacy Support)
   ============================================ */

/* When button only has a single icon (no .toggle-icon wrapper) */
#theme-toggle > i:only-child,
.theme-toggle-btn > i:only-child {
    font-size: 1.2rem;
    transition: all 0.3s ease;
}

/* Light mode - single icon */
#theme-toggle > i.fa-moon:only-child,
.theme-toggle-btn > i.fa-moon:only-child {
    color: #6366f1;
}

/* Dark mode - single icon */
body.dark-theme #theme-toggle > i.fa-sun:only-child,
body.dark-theme .theme-toggle-btn > i.fa-sun:only-child,
html.dark-mode #theme-toggle > i.fa-sun:only-child,
html.dark-mode .theme-toggle-btn > i.fa-sun:only-child,
html[data-theme="dark"] #theme-toggle > i.fa-sun:only-child,
html[data-theme="dark"] .theme-toggle-btn > i.fa-sun:only-child {
    color: #fbbf24;
    filter: drop-shadow(0 0 6px rgba(251, 191, 36, 0.5));
}

/* ============================================
   HOVER GLOW EFFECT
   ============================================ */

#theme-toggle::before,
.theme-toggle-btn::before {
    content: '';
    position: absolute;
    inset: -2px;
    border-radius: 14px;
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    opacity: 0;
    z-index: -1;
    transition: opacity 0.3s ease;
}

#theme-toggle:hover::before,
.theme-toggle-btn:hover::before {
    opacity: 0.2;
}

body.dark-theme #theme-toggle::before,
body.dark-theme .theme-toggle-btn::before,
html.dark-mode #theme-toggle::before,
html.dark-mode .theme-toggle-btn::before,
html[data-theme="dark"] #theme-toggle::before,
html[data-theme="dark"] .theme-toggle-btn::before {
    background: linear-gradient(135deg, #fbbf24, #f59e0b);
}

/* ============================================
   RESPONSIVE ADJUSTMENTS
   ============================================ */

@media (max-width: 768px) {
    #theme-toggle,
    .theme-toggle-btn {
        width: 40px;
        height: 40px;
        border-radius: 10px;
    }
    
    #theme-toggle .moon-icon,
    .theme-toggle-btn .moon-icon {
        font-size: 1.1rem;
    }
    
    #theme-toggle .sun-icon,
    .theme-toggle-btn .sun-icon {
        font-size: 1.15rem;
    }
}

@media (max-width: 480px) {
    #theme-toggle,
    .theme-toggle-btn {
        width: 36px;
        height: 36px;
        border-radius: 8px;
    }
    
    #theme-toggle .moon-icon,
    .theme-toggle-btn .moon-icon,
    #theme-toggle .sun-icon,
    .theme-toggle-btn .sun-icon {
        font-size: 1rem;
    }
}

/* ============================================
   ALERTS AND NOTIFICATIONS
   ============================================ */

.alert {
    border-color: var(--color-border);
}

.alert-danger {
    background-color: rgba(239, 68, 68, 0.1);
    border-color: var(--color-danger);
    color: var(--color-danger);
}

.alert-success {
    background-color: rgba(16, 185, 129, 0.1);
    border-color: var(--color-success);
    color: var(--color-success);
}

.alert-warning {
    background-color: rgba(245, 158, 11, 0.1);
    border-color: var(--color-warning);
    color: var(--color-warning);
}

.alert-info {
    background-color: rgba(59, 130, 246, 0.1);
    border-color: var(--color-info);
    color: var(--color-info);
}

/* ============================================
   SCROLLBAR STYLES (WebKit only)
   ============================================ */

::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background-color: var(--color-bg-secondary);
}

::-webkit-scrollbar-thumb {
    background-color: var(--color-text-tertiary);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background-color: var(--color-text-secondary);
}

/* ============================================
   SMOOTH TRANSITIONS
   ============================================ */

* {
    transition: background-color var(--transition-speed) ease,
                color var(--transition-speed) ease,
                border-color var(--transition-speed) ease;
}

/* Disable transitions for images and some elements */
img,
svg,
iframe {
    transition: none !important;
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

.theme-light {
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
}

.theme-dark {
    background-color: var(--color-bg-secondary);
    color: var(--color-text-secondary);
}

.theme-primary {
    color: var(--color-primary);
}

.theme-secondary {
    color: var(--color-secondary);
}

/* ============================================
   CUSTOM STYLES FOR EXISTING COMPONENTS
   ============================================ */

/* Plans Section */
.plan-card {
    background-color: var(--color-bg-primary);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
}

.plan-card:hover {
    box-shadow: var(--shadow-lg);
}

/* Navigation Items */
.nav-item {
    color: var(--color-text-primary);
}

.nav-item:hover {
    color: var(--color-primary);
}

/* Dashboard Elements */
.dashboard-stat {
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
}

/* Chat/Conversation */
.chat-bubble {
    background-color: var(--color-bg-secondary);
    border-color: var(--color-border);
}

.chat-bubble.user {
    background-color: var(--color-primary);
    color: white;
}

/* Modals */
.modal-content {
    background-color: var(--color-bg-primary);
}

.modal-header {
    border-bottom-color: var(--color-border);
}

.modal-footer {
    border-top-color: var(--color-border);
}

/* Forms */
.form-group label {
    color: var(--color-text-primary);
}

.form-control {
    background-color: var(--color-bg-secondary);
    border-color: var(--color-border);
    color: var(--color-text-primary);
}

.form-control:focus {
    background-color: var(--color-bg-primary);
    border-color: var(--color-primary);
}

/* Footer */
footer {
    background-color: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    color: var(--color-text-secondary);
}

/* Print Styles */
@media print {
    :root {
        --color-bg-primary: #ffffff;
        --color-text-primary: #000000;
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    * {
        transition: none !important;
        animation: none !important;
    }
}