/**
 * Material Design 3 Theme for Personal Finance Tracker
 * Inspired by Google's Material You design system
 * Now with Dark Mode Support and Improved Color Palette
 */

:root {
    /* Material Design 3 Color Palette - Emerald/Teal Theme */
    --md-primary: #10B981;
    --md-primary-dark: #059669;
    --md-primary-light: #34D399;
    --md-secondary: #14B8A6;
    --md-secondary-dark: #0D9488;
    --md-secondary-light: #5EEAD4;
    --md-success: #22C55E;
    --md-warning: #F59E0B;
    --md-error: #EF4444;
    --md-info: #3B82F6;

    /* Surface colors - Light Mode */
    --md-surface: #FFFFFF;
    --md-surface-variant: #F3F4F6;
    --md-surface-container: #F9FAFB;
    --md-surface-container-high: #E5E7EB;

    /* Text colors - Light Mode */
    --md-on-surface: #111827;
    --md-on-surface-variant: #6B7280;
    --md-on-primary: #FFFFFF;

    /* Elevation shadows */
    --md-elevation-1: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
    --md-elevation-2: 0 3px 6px rgba(0,0,0,0.16), 0 3px 6px rgba(0,0,0,0.23);
    --md-elevation-3: 0 10px 20px rgba(0,0,0,0.19), 0 6px 6px rgba(0,0,0,0.23);
    --md-elevation-4: 0 14px 28px rgba(0,0,0,0.25), 0 10px 10px rgba(0,0,0,0.22);
    --md-elevation-5: 0 19px 38px rgba(0,0,0,0.30), 0 15px 12px rgba(0,0,0,0.22);

    /* Border radius */
    --md-radius-sm: 8px;
    --md-radius-md: 12px;
    --md-radius-lg: 16px;
    --md-radius-xl: 24px;
    --md-radius-full: 9999px;

    /* Transitions */
    --md-transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --md-transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --md-transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Mode Theme */
[data-theme="dark"] {
    /* Keep same primary colors but adjust for dark backgrounds */
    --md-primary: #34D399;
    --md-primary-dark: #10B981;
    --md-primary-light: #6EE7B7;
    --md-secondary: #5EEAD4;
    --md-secondary-dark: #14B8A6;
    --md-secondary-light: #99F6E4;
    --md-success: #4ADE80;
    --md-warning: #FBBF24;
    --md-error: #F87171;
    --md-info: #60A5FA;

    /* Surface colors - Dark Mode */
    --md-surface: #1F2937;
    --md-surface-variant: #111827;
    --md-surface-container: #374151;
    --md-surface-container-high: #4B5563;

    /* Text colors - Dark Mode */
    --md-on-surface: #F9FAFB;
    --md-on-surface-variant: #D1D5DB;
    --md-on-primary: #111827;

    /* Dark mode shadows (lighter for visibility) */
    --md-elevation-1: 0 1px 3px rgba(0,0,0,0.4), 0 1px 2px rgba(0,0,0,0.5);
    --md-elevation-2: 0 3px 6px rgba(0,0,0,0.5), 0 3px 6px rgba(0,0,0,0.6);
    --md-elevation-3: 0 10px 20px rgba(0,0,0,0.6), 0 6px 6px rgba(0,0,0,0.7);
    --md-elevation-4: 0 14px 28px rgba(0,0,0,0.7), 0 10px 10px rgba(0,0,0,0.8);
    --md-elevation-5: 0 19px 38px rgba(0,0,0,0.8), 0 15px 12px rgba(0,0,0,0.9);
}

/* Global Styles */
* {
    box-sizing: border-box;
}

body {
    font-family: 'Roboto', 'Segoe UI', system-ui, -apple-system, sans-serif;
    background-color: var(--md-surface-variant);
    color: var(--md-on-surface);
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

/* Material Design Cards */
.md-card {
    background: var(--md-surface);
    border-radius: var(--md-radius-lg);
    box-shadow: var(--md-elevation-1);
    transition: box-shadow var(--md-transition-normal);
    overflow: hidden;
}

.md-card:hover {
    box-shadow: var(--md-elevation-2);
}

.md-card-elevated {
    box-shadow: var(--md-elevation-2);
}

.md-card-elevated:hover {
    box-shadow: var(--md-elevation-3);
}

.md-card-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--md-surface-container-high);
}

.md-card-title {
    font-size: 20px;
    font-weight: 500;
    margin: 0;
    color: var(--md-on-surface);
}

.md-card-subtitle {
    font-size: 14px;
    color: var(--md-on-surface-variant);
    margin: 4px 0 0 0;
}

.md-card-body {
    padding: 24px;
}

.md-card-actions {
    padding: 16px 24px;
    display: flex;
    gap: 12px;
    justify-content: flex-end;
}

/* Material Design Buttons */
.md-btn {
    font-family: 'Roboto', sans-serif;
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    padding: 10px 24px;
    border: none;
    border-radius: var(--md-radius-full);
    cursor: pointer;
    transition: all var(--md-transition-fast);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    position: relative;
    overflow: hidden;
}

.md-btn:before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width var(--md-transition-normal), height var(--md-transition-normal);
}

.md-btn:active:before {
    width: 300px;
    height: 300px;
}

.md-btn-filled {
    background-color: var(--md-primary);
    color: var(--md-on-primary);
    box-shadow: var(--md-elevation-1);
}

.md-btn-filled:hover {
    background-color: var(--md-primary-dark);
    box-shadow: var(--md-elevation-2);
}

.md-btn-outlined {
    background-color: transparent;
    color: var(--md-primary);
    border: 1px solid var(--md-primary);
}

.md-btn-outlined:hover {
    background-color: rgba(16, 185, 129, 0.08);
}

.md-btn-text {
    background-color: transparent;
    color: var(--md-primary);
    padding: 10px 16px;
}

.md-btn-text:hover {
    background-color: rgba(16, 185, 129, 0.08);
}

.md-btn-icon {
    padding: 12px;
    border-radius: var(--md-radius-full);
    background-color: transparent;
    color: var(--md-on-surface-variant);
}

.md-btn-icon:hover {
    background-color: var(--md-surface-container);
}

/* FAB (Floating Action Button) */
.md-fab {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 56px;
    height: 56px;
    border-radius: var(--md-radius-lg);
    background-color: var(--md-secondary);
    color: var(--md-on-primary);
    border: none;
    box-shadow: var(--md-elevation-3);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--md-transition-normal);
    z-index: 1000;
}

.md-fab:hover {
    box-shadow: var(--md-elevation-4);
    transform: scale(1.05);
}

.md-fab-extended {
    width: auto;
    padding: 0 24px;
    gap: 12px;
}

/* Material Design Navigation */
.md-nav-rail {
    width: 80px;
    background-color: var(--md-surface);
    box-shadow: var(--md-elevation-1);
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 16px 0;
    gap: 12px;
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    z-index: 100;
}

.md-nav-drawer {
    width: 280px;
    background-color: var(--md-surface);
    box-shadow: var(--md-elevation-1);
    display: flex;
    flex-direction: column;
    padding: 24px 0;
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    z-index: 100;
    overflow-y: auto;
}

.md-nav-item {
    width: 100%;
    padding: 12px 24px;
    display: flex;
    align-items: center;
    gap: 16px;
    color: var(--md-on-surface-variant);
    text-decoration: none;
    transition: background-color var(--md-transition-fast);
    border-radius: 0;
}

.md-nav-item:hover {
    background-color: var(--md-surface-container);
}

.md-nav-item.active {
    background-color: var(--md-secondary-light);
    color: var(--md-secondary-dark);
    font-weight: 500;
}

.md-nav-icon {
    width: 24px;
    height: 24px;
    font-size: 24px;
}

/* Material Design Top App Bar */
.md-top-app-bar {
    background-color: var(--md-surface);
    box-shadow: var(--md-elevation-1);
    padding: 16px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 99;
}

.md-top-app-bar-title {
    font-size: 22px;
    font-weight: 400;
    margin: 0;
}

.md-top-app-bar-actions {
    display: flex;
    gap: 8px;
    align-items: center;
}

/* Material Design Forms */
.md-text-field {
    position: relative;
    margin-bottom: 20px;
}

.md-text-field input,
.md-text-field select,
.md-text-field textarea {
    width: 100%;
    padding: 16px 12px 8px;
    border: 1px solid var(--md-on-surface-variant);
    border-radius: var(--md-radius-sm) var(--md-radius-sm) 0 0;
    background-color: var(--md-surface-container);
    font-family: 'Roboto', sans-serif;
    font-size: 16px;
    color: var(--md-on-surface);
    transition: all var(--md-transition-fast);
}

.md-text-field input:focus,
.md-text-field select:focus,
.md-text-field textarea:focus {
    outline: none;
    border-bottom: 2px solid var(--md-primary);
    background-color: var(--md-surface-variant);
}

.md-text-field label {
    position: absolute;
    left: 12px;
    top: 16px;
    font-size: 16px;
    color: var(--md-on-surface-variant);
    transition: all var(--md-transition-fast);
    pointer-events: none;
}

.md-text-field input:focus + label,
.md-text-field input:not(:placeholder-shown) + label,
.md-text-field select:focus + label,
.md-text-field select:not([value=""]) + label,
.md-text-field textarea:focus + label,
.md-text-field textarea:not(:placeholder-shown) + label {
    top: 4px;
    font-size: 12px;
    color: var(--md-primary);
}

/* Material Design Chips */
.md-chip {
    display: inline-flex;
    align-items: center;
    padding: 6px 12px;
    border-radius: var(--md-radius-sm);
    background-color: var(--md-surface-container);
    color: var(--md-on-surface);
    font-size: 14px;
    gap: 8px;
}

.md-chip-primary {
    background-color: rgba(16, 185, 129, 0.12);
    color: var(--md-primary);
}

.md-chip-success {
    background-color: rgba(67, 160, 71, 0.12);
    color: var(--md-success);
}

.md-chip-error {
    background-color: rgba(229, 57, 53, 0.12);
    color: var(--md-error);
}

.md-chip-warning {
    background-color: rgba(251, 140, 0, 0.12);
    color: var(--md-warning);
}

/* Material Design Snackbar */
.md-snackbar {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background-color: #323232;
    color: white;
    padding: 14px 24px;
    border-radius: var(--md-radius-sm);
    box-shadow: var(--md-elevation-3);
    display: flex;
    align-items: center;
    gap: 16px;
    min-width: 280px;
    max-width: calc(100vw - 32px);
    opacity: 0;
    transition: all var(--md-transition-normal);
    z-index: 10000;
}

.md-snackbar.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

/* Material Design Progress */
.md-progress-linear {
    height: 4px;
    background-color: var(--md-surface-container);
    border-radius: var(--md-radius-full);
    overflow: hidden;
    position: relative;
}

.md-progress-bar {
    height: 100%;
    background-color: var(--md-primary);
    border-radius: var(--md-radius-full);
    transition: width var(--md-transition-normal);
}

/* Material Design List */
.md-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.md-list-item {
    padding: 12px 16px;
    display: flex;
    align-items: center;
    gap: 16px;
    transition: background-color var(--md-transition-fast);
    cursor: pointer;
}

.md-list-item:hover {
    background-color: var(--md-surface-container);
}

.md-list-item-icon {
    width: 24px;
    height: 24px;
    color: var(--md-on-surface-variant);
    flex-shrink: 0;
}

.md-list-item-text {
    flex: 1;
    min-width: 0; /* Allow text to shrink and wrap */
}

.md-list-item-primary {
    font-size: 16px;
    color: var(--md-on-surface);
    word-wrap: break-word;
}

.md-list-item-secondary {
    font-size: 14px;
    color: var(--md-on-surface-variant);
    word-wrap: break-word;
}

/* Tables - Make them scrollable on mobile */
.table-container {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

table {
    min-width: 100%;
    border-collapse: collapse;
}

table th,
table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--md-surface-container-high);
}

table th {
    font-weight: 500;
    color: var(--md-on-surface-variant);
    background-color: var(--md-surface-container);
}

/* Chart containers - ensure they're responsive */
canvas {
    max-width: 100%;
    height: auto !important;
}

/* Material Design Divider */
.md-divider {
    height: 1px;
    background-color: var(--md-surface-container-high);
    border: none;
    margin: 16px 0;
}

/* Layout */
.md-container {
    margin-left: 280px;
    padding: 24px;
    max-width: 1400px;
}

.md-grid {
    display: grid;
    gap: 24px;
}

.md-grid-cols-1 { grid-template-columns: repeat(1, 1fr); }
.md-grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.md-grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.md-grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1024px) {
    .md-grid-cols-4 { grid-template-columns: repeat(2, 1fr); }
    .md-grid-cols-3 { grid-template-columns: repeat(2, 1fr); }
}

/* Mobile Menu Button */
.md-mobile-menu-btn {
    position: fixed;
    top: 16px;
    left: 16px;
    width: 48px;
    height: 48px;
    border-radius: var(--md-radius-full);
    background-color: var(--md-primary);
    color: var(--md-on-primary);
    border: none;
    box-shadow: var(--md-elevation-2);
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    z-index: 1001;
    transition: all var(--md-transition-fast);
}

.md-mobile-menu-btn:active {
    transform: scale(0.95);
}

/* Backdrop Overlay */
.md-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: all var(--md-transition-normal);
    z-index: 99;
}

.md-backdrop.show {
    opacity: 1;
    visibility: visible;
}

/* Responsive Breakpoints */
@media (max-width: 1024px) {
    .md-grid-cols-4 { grid-template-columns: repeat(2, 1fr); }
    .md-grid-cols-3 { grid-template-columns: repeat(2, 1fr); }

    /* Better spacing on tablets */
    .md-container {
        padding: 20px;
    }
}

@media (max-width: 768px) {
    .md-container {
        margin-left: 0;
        padding: 16px;
        padding-top: 80px; /* Space for mobile menu button */
    }

    .md-nav-drawer {
        transform: translateX(-100%);
        transition: transform var(--md-transition-normal);
        z-index: 100;
    }

    .md-nav-drawer.open {
        transform: translateX(0);
    }

    .md-mobile-menu-btn {
        display: flex;
    }

    .md-grid-cols-2,
    .md-grid-cols-3,
    .md-grid-cols-4 {
        grid-template-columns: repeat(1, 1fr);
    }

    /* Make FAB smaller and reposition on mobile */
    .md-fab {
        width: 48px;
        height: 48px;
        bottom: 16px;
        right: 16px;
    }

    /* Better button sizing for touch */
    .md-btn {
        min-height: 44px;
        padding: 12px 20px;
    }

    .md-btn-icon {
        min-width: 44px;
        min-height: 44px;
    }

    /* Responsive snackbar */
    .md-snackbar {
        min-width: auto;
        width: calc(100vw - 32px);
        left: 16px;
        right: 16px;
        transform: translateX(0) translateY(100px);
        bottom: 16px;
    }

    .md-snackbar.show {
        transform: translateX(0) translateY(0);
    }
}

/* Small mobile devices */
@media (max-width: 480px) {
    .md-container {
        padding: 12px;
        padding-top: 72px;
    }

    /* Smaller text on very small screens */
    h1 {
        font-size: 24px !important;
    }

    h2 {
        font-size: 20px !important;
    }

    /* Card padding adjustment */
    .md-card-body {
        padding: 16px;
    }

    .md-card-header {
        padding: 16px;
    }

    /* List item padding */
    .md-list-item {
        padding: 10px 12px;
    }

    /* Smaller gaps in grids */
    .md-grid {
        gap: 16px;
    }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-right { text-align: right; }
.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.p-0 { padding: 0; }
.p-1 { padding: 8px; }
.p-2 { padding: 16px; }
.p-3 { padding: 24px; }

/* Responsive Utilities */
.mobile-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
}

.mobile-full-width {
    width: 100%;
}

/* Make button groups wrap on mobile */
@media (max-width: 768px) {
    /* Page headers that have title and actions */
    div[style*="display: flex"][style*="justify-content: space-between"] {
        flex-direction: column !important;
        align-items: flex-start !important;
        gap: 16px;
    }

    /* Button groups in headers */
    div[style*="display: flex"][style*="gap"] button,
    div[style*="display: flex"][style*="gap"] a.md-btn {
        flex: 1 1 auto;
        min-width: fit-content;
    }

    /* Make forms stack better on mobile */
    form[style*="grid-template-columns"] {
        grid-template-columns: 1fr !important;
    }

    /* Card titles and actions */
    .md-card-header[style*="display: flex"] {
        flex-direction: column !important;
        align-items: flex-start !important;
        gap: 12px;
    }
}

/* Very small screens - make buttons full width */
@media (max-width: 480px) {
    div[style*="display: flex"][style*="gap"] {
        width: 100%;
    }

    div[style*="display: flex"][style*="gap"] button,
    div[style*="display: flex"][style*="gap"] a.md-btn {
        width: 100%;
        justify-content: center;
    }

    /* Make text fields better on small screens */
    .md-text-field input,
    .md-text-field select,
    .md-text-field textarea {
        font-size: 16px; /* Prevents iOS zoom on focus */
    }

    /* Ensure gradient cards are readable on small screens */
    .md-card-body h2 {
        font-size: 24px !important;
    }

    .md-card-body h6 {
        font-size: 12px !important;
    }

    /* Icon sizes in list items for mobile */
    .md-list-item-icon {
        width: 40px;
        height: 40px;
    }

    /* Better chip sizing on mobile */
    .md-chip {
        font-size: 12px;
        padding: 4px 10px;
    }
}

/* Modal dialogs - ensure they're mobile friendly */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
}

.modal-content {
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    background: var(--md-surface);
    border-radius: var(--md-radius-lg);
    box-shadow: var(--md-elevation-5);
}

@media (max-width: 768px) {
    .modal-content {
        max-width: 100%;
        max-height: calc(100vh - 32px);
    }

    /* Ensure modal forms are usable on mobile */
    .modal .md-text-field {
        margin-bottom: 16px;
    }

    /* Modal buttons should stack on mobile */
    .modal .md-card-actions {
        flex-direction: column;
    }

    .modal .md-card-actions button,
    .modal .md-card-actions a {
        width: 100%;
    }
}

/* Improve canvas sizing for charts on mobile */
@media (max-width: 768px) {
    canvas {
        max-height: 250px !important;
    }

    /* List items with complex layouts */
    .md-list-item {
        flex-wrap: wrap;
        gap: 12px;
    }

    /* Better overflow handling */
    * {
        overflow-wrap: break-word;
        word-wrap: break-word;
    }
}

/* Landscape mobile orientation */
@media (max-width: 896px) and (orientation: landscape) {
    .md-container {
        padding-top: 60px;
    }

    .md-mobile-menu-btn {
        top: 8px;
        left: 8px;
        width: 44px;
        height: 44px;
    }
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn var(--md-transition-normal) ease-out;
}