/* ==========================================
   HABIT TRACKER PRO - MAIN STYLES
   ========================================== */

/* CSS Variables for Theming */
:root {
    /* Colors - Light Theme */
    --color-primary: #6366F1;
    --color-primary-dark: #4F46E5;
    --color-primary-light: #818CF8;
    --color-secondary: #8B5CF6;
    --color-success: #10B981;
    --color-warning: #F59E0B;
    --color-danger: #EF4444;
    --color-info: #3B82F6;
    
    /* Background Colors */
    --bg-primary: #FFFFFF;
    --bg-secondary: #F9FAFB;
    --bg-tertiary: #F3F4F6;
    --bg-elevated: #FFFFFF;
    
    /* Text Colors */
    --text-primary: #111827;
    --text-secondary: #6B7280;
    --text-tertiary: #9CA3AF;
    --text-inverse: #FFFFFF;
    
    /* Border Colors */
    --border-color: #E5E7EB;
    --border-color-dark: #D1D5DB;
    
    /* Shadow */
    --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);
    
    /* 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: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 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: 2.25rem;
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Z-Index */
    --z-base: 1;
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

/* ==========================================
   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);
    font-size: var(--font-size-base);
    line-height: 1.5;
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    overflow-x: hidden;
}

/* ==========================================
   LOADING SCREEN
   ========================================== */

.loading-screen {
    position: fixed;
    inset: 0;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.loading-screen.hide {
    opacity: 0;
    visibility: hidden;
}

.loading-content {
    text-align: center;
    color: white;
}

.loading-logo {
    font-size: 4rem;
    margin-bottom: var(--spacing-lg);
    animation: bounce 1s infinite;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    margin: var(--spacing-lg) auto;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: var(--radius-full);
    animation: spin 0.8s linear infinite;
}

.loading-text {
    font-size: var(--font-size-lg);
    font-weight: 600;
    letter-spacing: 0.05em;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

/* ==========================================
   APP CONTAINER
   ========================================== */

.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    max-width: 100vw;
    overflow-x: hidden;
}

.app-container.hidden {
    display: none;
}

/* ==========================================
   TOP NAVIGATION
   ========================================== */

.top-nav {
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    background-color: var(--bg-elevated);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
}

.nav-left, .nav-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.nav-center {
    flex: 1;
    text-align: center;
}

.app-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 700;
    font-size: var(--font-size-lg);
    color: var(--text-primary);
}

.logo-icon {
    font-size: var(--font-size-2xl);
}

.date-display {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    font-weight: 500;
}

.icon-btn {
    position: relative;
    width: 40px;
    height: 40px;
    border: none;
    background: transparent;
    border-radius: var(--radius-lg);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color var(--transition-fast);
}

.icon-btn:hover {
    background-color: var(--bg-tertiary);
}

.icon-btn:active {
    transform: scale(0.95);
}

.notification-badge {
    position: absolute;
    top: 4px;
    right: 4px;
    background-color: var(--color-danger);
    color: white;
    font-size: var(--font-size-xs);
    font-weight: 700;
    padding: 2px 6px;
    border-radius: var(--radius-full);
    min-width: 18px;
    text-align: center;
}

.notification-badge.hidden {
    display: none;
}

/* ==========================================
   SIDE MENU
   ========================================== */

.side-menu {
    position: fixed;
    left: -280px;
    top: 0;
    bottom: 0;
    width: 280px;
    background-color: var(--bg-elevated);
    box-shadow: var(--shadow-xl);
    z-index: var(--z-modal);
    overflow-y: auto;
    transition: transform var(--transition-base);
}

.side-menu.open {
    transform: translateX(280px);
}

.side-menu-header {
    padding: var(--spacing-xl);
    border-bottom: 1px solid var(--border-color);
}

.user-profile {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.user-avatar {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: white;
}

.user-info h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 2px;
}

.user-level {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.side-menu-content {
    padding: var(--spacing-lg) 0;
}

.menu-section {
    margin-bottom: var(--spacing-xl);
}

.menu-section-title {
    font-size: var(--font-size-xs);
    font-weight: 700;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0 var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
}

.menu-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    color: var(--text-secondary);
    text-decoration: none;
    transition: all var(--transition-fast);
    font-weight: 500;
}

.menu-item:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.menu-item.active {
    background-color: var(--color-primary);
    color: white;
}

.menu-icon {
    font-size: var(--font-size-xl);
    width: 24px;
    text-align: center;
}

.side-menu-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
}

.theme-toggle-btn {
    width: 100%;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    cursor: pointer;
    font-size: var(--font-size-base);
    transition: all var(--transition-fast);
}

.theme-toggle-btn:hover {
    background-color: var(--bg-tertiary);
}

.theme-icon {
    font-size: var(--font-size-xl);
}

.menu-overlay {
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: calc(var(--z-modal) - 1);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-base), visibility var(--transition-base);
}

.menu-overlay.show {
    opacity: 1;
    visibility: visible;
}

/* ==========================================
   MAIN CONTENT
   ========================================== */

.main-content {
    flex: 1;
    padding: var(--spacing-lg);
    padding-bottom: calc(80px + var(--spacing-lg));
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

.view {
    display: none;
}

.view.active {
    display: block;
    animation: fadeIn var(--transition-base);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.view-header {
    margin-bottom: var(--spacing-xl);
}

.view-header h1 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.view-subtitle {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
}

/* ==========================================
   HERO SECTION
   ========================================== */

.hero-section {
    margin-bottom: var(--spacing-2xl);
}

.greeting-container {
    margin-bottom: var(--spacing-xl);
}

.greeting-text {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.greeting-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
}

.quick-stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: var(--spacing-md);
}

.stat-card {
    background-color: var(--bg-elevated);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.stat-icon {
    font-size: var(--font-size-3xl);
}

.stat-content {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-bottom: 2px;
}

.stat-value {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text-primary);
}

/* ==========================================
   XP SECTION
   ========================================== */

.xp-section {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
    color: white;
}

.xp-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.xp-info {
    display: flex;
    flex-direction: column;
}

.xp-label {
    font-size: var(--font-size-sm);
    opacity: 0.9;
    font-weight: 600;
}

.xp-text {
    font-size: var(--font-size-lg);
    font-weight: 700;
}

.xp-rewards-btn {
    background-color: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-lg);
    padding: var(--spacing-sm) var(--spacing-md);
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 600;
    transition: background-color var(--transition-fast);
}

.xp-rewards-btn:hover {
    background-color: rgba(255, 255, 255, 0.3);
}

.xp-progress-bar {
    height: 12px;
    background-color: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.xp-progress-fill {
    height: 100%;
    background-color: white;
    border-radius: var(--radius-full);
    transition: width var(--transition-slow);
}

/* ==========================================
   MOOD SECTION
   ========================================== */

.mood-section {
    background-color: var(--bg-elevated);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.section-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
}

.view-all-link {
    font-size: var(--font-size-sm);
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 600;
    transition: color var(--transition-fast);
}

.view-all-link:hover {
    color: var(--color-primary-dark);
}

.mood-selector {
    display: flex;
    justify-content: space-between;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.mood-btn {
    flex: 1;
    font-size: var(--font-size-3xl);
    padding: var(--spacing-md);
    background-color: var(--bg-tertiary);
    border: 2px solid transparent;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.mood-btn:hover {
    transform: scale(1.05);
    background-color: var(--bg-secondary);
}

.mood-btn.active {
    border-color: var(--color-primary);
    background-color: rgba(99, 102, 241, 0.1);
    transform: scale(1.1);
}

.energy-selector {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.energy-label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    font-weight: 600;
}

.energy-slider-container {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.energy-icon {
    font-size: var(--font-size-xl);
}

.energy-slider {
    flex: 1;
    height: 8px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    outline: none;
}

.energy-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    background: var(--color-primary);
    border-radius: var(--radius-full);
    cursor: pointer;
}

.energy-slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    background: var(--color-primary);
    border-radius: var(--radius-full);
    cursor: pointer;
    border: none;
}

.energy-value {
    font-weight: 600;
    color: var(--text-primary);
    min-width: 50px;
    text-align: right;
}

/* ==========================================
   HABITS SECTION
   ========================================== */

.habits-section {
    margin-bottom: var(--spacing-2xl);
}

.add-habit-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background-color: var(--color-primary);
    color: white;
    border: none;
    border-radius: var(--radius-lg);
    padding: var(--spacing-sm) var(--spacing-md);
    cursor: pointer;
    font-weight: 600;
    transition: background-color var(--transition-fast);
}

.add-habit-btn:hover {
    background-color: var(--color-primary-dark);
}

.habits-progress {
    background-color: var(--bg-elevated);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.progress-text {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.progress-bar {
    height: 8px;
    background-color: var(--bg-tertiary);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    border-radius: var(--radius-full);
    transition: width var(--transition-slow);
}

.habits-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.habit-card {
    background-color: var(--bg-elevated);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    transition: all var(--transition-fast);
    cursor: pointer;
}

.habit-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(4px);
}

.habit-card.completed {
    opacity: 0.7;
    background-color: var(--bg-tertiary);
}

.habit-checkbox {
    width: 32px;
    height: 32px;
    min-width: 32px;
    border: 2px solid var(--border-color-dark);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.habit-checkbox:hover {
    border-color: var(--color-primary);
}

.habit-checkbox.checked {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
}

.habit-checkbox.checked svg {
    display: block;
}

.habit-checkbox svg {
    display: none;
    width: 18px;
    height: 18px;
    stroke: white;
    stroke-width: 3;
}

.habit-info {
    flex: 1;
}

.habit-name {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: 2px;
}

.habit-meta {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.habit-streak {
    display: flex;
    align-items: center;
    gap: 4px;
}

.empty-state {
    text-align: center;
    padding: var(--spacing-2xl);
}

.empty-state.hidden {
    display: none;
}

.empty-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-lg);
}

.empty-state h3 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.empty-state p {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

/* ==========================================
   BUTTONS
   ========================================== */

.btn-primary {
    background-color: var(--color-primary);
    color: white;
    border: none;
    border-radius: var(--radius-lg);
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

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

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color-dark);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-secondary:hover {
    background-color: var(--bg-tertiary);
}

.btn-danger {
    background-color: var(--color-danger);
    color: white;
    border: none;
    border-radius: var(--radius-lg);
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-danger:hover {
    background-color: #DC2626;
}

/* ==========================================
   BOTTOM NAVIGATION
   ========================================== */

.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: var(--bg-elevated);
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-around;
    padding: var(--spacing-sm) var(--spacing-md);
    z-index: var(--z-sticky);
    box-shadow: var(--shadow-lg);
}

.nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: var(--font-size-xs);
    padding: var(--spacing-sm);
    cursor: pointer;
    transition: color var(--transition-fast);
}

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

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

.nav-item-fab {
    position: relative;
    margin-top: -24px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: white;
    border-radius: var(--radius-full);
    width: 56px;
    height: 56px;
    box-shadow: var(--shadow-lg);
}

.nav-item-fab:hover {
    transform: scale(1.05);
    color: white;
}

/* ==========================================
   MODALS
   ========================================== */

.modal {
    display: none;
    position: fixed;
    inset: 0;
    z-index: var(--z-modal);
    background-color: rgba(0, 0, 0, 0.5);
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
}

.modal.show {
    display: flex;
}

.modal-content {
    background-color: var(--bg-elevated);
    border-radius: var(--radius-xl);
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    animation: modalSlideIn var(--transition-base);
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-xl);
    border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text-primary);
}

.modal-close {
    width: 32px;
    height: 32px;
    background: none;
    border: none;
    font-size: var(--font-size-2xl);
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: background-color var(--transition-fast);
}

.modal-close:hover {
    background-color: var(--bg-tertiary);
}

.modal-body {
    padding: var(--spacing-xl);
}

/* ==========================================
   FORMS
   ========================================== */

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.form-group input[type="text"],
.form-group input[type="time"],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
}

.form-group.hidden {
    display: none;
}

.days-selector {
    display: flex;
    gap: var(--spacing-sm);
}

.day-btn {
    flex: 1;
    padding: var(--spacing-md);
    background-color: var(--bg-tertiary);
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.day-btn:hover {
    background-color: var(--bg-secondary);
}

.day-btn.active {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
}

.form-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.form-actions button {
    flex: 1;
}

/* ==========================================
   TOAST NOTIFICATIONS
   ========================================== */

.toast-container {
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    z-index: var(--z-tooltip);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.toast {
    background-color: var(--bg-elevated);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md) var(--spacing-lg);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    min-width: 300px;
    animation: toastSlideIn var(--transition-base);
}

@keyframes toastSlideIn {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.toast.success {
    border-left: 4px solid var(--color-success);
}

.toast.error {
    border-left: 4px solid var(--color-danger);
}

.toast.info {
    border-left: 4px solid var(--color-info);
}

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

.hidden {
    display: none !important;
}

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

.mt-lg {
    margin-top: var(--spacing-lg);
}

.mb-lg {
    margin-bottom: var(--spacing-lg);
}

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

@media (max-width: 768px) {
    .top-nav {
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .logo-text {
        display: none;
    }
    
    .main-content {
        padding: var(--spacing-md);
    }
    
    .greeting-text {
        font-size: var(--font-size-2xl);
    }
    
    .quick-stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .bottom-nav {
        display: none;
    }
    
    .main-content {
        padding-bottom: var(--spacing-lg);
    }
}