/* FinCaroTur - Personal Finance App
   Mobile-first, minimalist, modern design
*/

/* ========================================
   THEME SYSTEM - 8 Elegant Themes
   ======================================== */

/* Theme 1: Midnight (Default Dark) - Deep blue */
:root,
[data-theme="midnight"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent: #6366f1;
    --accent-light: #818cf8;
    --success: #22c55e;
    --warning: #f59e0b;
    --danger: #ef4444;
    --border: #334155;
    --shadow-color: rgba(0, 0, 0, 0.4);
}

/* Theme 2: Charcoal (Dark) - Pure dark grey */
[data-theme="charcoal"] {
    --bg-primary: #18181b;
    --bg-secondary: #27272a;
    --bg-tertiary: #3f3f46;
    --text-primary: #fafafa;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;
    --accent: #a855f7;
    --accent-light: #c084fc;
    --success: #22c55e;
    --warning: #f59e0b;
    --danger: #ef4444;
    --border: #3f3f46;
    --shadow-color: rgba(0, 0, 0, 0.5);
}

/* Theme 3: Forest (Dark) - Deep green */
[data-theme="forest"] {
    --bg-primary: #0c1a14;
    --bg-secondary: #14291f;
    --bg-tertiary: #1f3d2d;
    --text-primary: #f0fdf4;
    --text-secondary: #86efac;
    --text-muted: #4ade80;
    --accent: #22c55e;
    --accent-light: #4ade80;
    --success: #22c55e;
    --warning: #fbbf24;
    --danger: #f87171;
    --border: #1f3d2d;
    --shadow-color: rgba(0, 0, 0, 0.4);
}

/* Theme 4: Plum (Dark) - Deep purple/burgundy */
[data-theme="plum"] {
    --bg-primary: #1a0a1e;
    --bg-secondary: #2d1433;
    --bg-tertiary: #451a4a;
    --text-primary: #fdf4ff;
    --text-secondary: #e879f9;
    --text-muted: #c026d3;
    --accent: #e879f9;
    --accent-light: #f0abfc;
    --success: #4ade80;
    --warning: #fbbf24;
    --danger: #fb7185;
    --border: #451a4a;
    --shadow-color: rgba(0, 0, 0, 0.4);
}

/* Theme 5: Snow (Light) - Clean white */
[data-theme="snow"] {
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-tertiary: #e2e8f0;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --accent: #3b82f6;
    --accent-light: #60a5fa;
    --success: #16a34a;
    --warning: #d97706;
    --danger: #dc2626;
    --border: #e2e8f0;
    --shadow-color: rgba(0, 0, 0, 0.1);
}

/* Theme 6: Sand (Light) - Warm beige */
[data-theme="sand"] {
    --bg-primary: #faf7f2;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f0ebe3;
    --text-primary: #292524;
    --text-secondary: #57534e;
    --text-muted: #a8a29e;
    --accent: #d97706;
    --accent-light: #f59e0b;
    --success: #16a34a;
    --warning: #ca8a04;
    --danger: #dc2626;
    --border: #e7e5e4;
    --shadow-color: rgba(0, 0, 0, 0.08);
}

/* Theme 7: Mint (Light) - Fresh green */
[data-theme="mint"] {
    --bg-primary: #f0fdfa;
    --bg-secondary: #ffffff;
    --bg-tertiary: #ccfbf1;
    --text-primary: #134e4a;
    --text-secondary: #0f766e;
    --text-muted: #5eead4;
    --accent: #14b8a6;
    --accent-light: #2dd4bf;
    --success: #22c55e;
    --warning: #f59e0b;
    --danger: #ef4444;
    --border: #99f6e4;
    --shadow-color: rgba(0, 0, 0, 0.08);
}

/* Theme 8: Lavender (Light) - Soft purple */
[data-theme="lavender"] {
    --bg-primary: #faf5ff;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f3e8ff;
    --text-primary: #3b0764;
    --text-secondary: #6b21a8;
    --text-muted: #c4b5fd;
    --accent: #8b5cf6;
    --accent-light: #a78bfa;
    --success: #22c55e;
    --warning: #f59e0b;
    --danger: #ef4444;
    --border: #e9d5ff;
    --shadow-color: rgba(0, 0, 0, 0.08);
}

/* ========================================
   BASE VARIABLES (non-theme)
   ======================================== */

:root {
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;

    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-md: 1rem;
    --font-size-lg: 1.25rem;
    --font-size-xl: 1.5rem;
    --font-size-2xl: 2rem;

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

    /* Shadows - using theme shadow-color */
    --shadow-sm: 0 1px 2px var(--shadow-color);
    --shadow-md: 0 4px 6px var(--shadow-color);
    --shadow-lg: 0 10px 15px var(--shadow-color);

    /* Safe areas */
    --safe-top: env(safe-area-inset-top, 0px);
    --safe-bottom: env(safe-area-inset-bottom, 0px);
    --nav-height: 70px;
}

/* Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: var(--font-family);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
    min-height: 100dvh;
    overflow-x: hidden;
    padding-bottom: calc(var(--nav-height) + var(--safe-bottom));
}

/* Typography */
h1, h2, h3 {
    font-weight: 600;
    line-height: 1.2;
}

h1 { font-size: var(--font-size-xl); }
h2 { font-size: var(--font-size-lg); }
h3 { font-size: var(--font-size-md); }

/* Main Content */
.main-content {
    padding: var(--spacing-md);
    padding-top: calc(var(--safe-top) + var(--spacing-md));
    max-width: 600px;
    margin: 0 auto;
}

/* Page Header */
.page-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.page-header h1 {
    color: var(--text-primary);
    font-size: var(--font-size-lg);
    font-weight: 500;
    letter-spacing: -0.02em;
}

/* Month Selector */
.month-selector {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
}

.month-nav {
    background: var(--bg-secondary);
    border: none;
    color: var(--text-primary);
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background 0.2s;
}

.month-nav:active {
    background: var(--bg-tertiary);
}

.current-month {
    font-size: var(--font-size-md);
    font-weight: 500;
    min-width: 140px;
    text-align: center;
}

/* Navigation */
.nav-bottom {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: calc(var(--nav-height) + var(--safe-bottom));
    padding-bottom: var(--safe-bottom);
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: space-around;
    align-items: center;
    z-index: 100;
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    text-decoration: none;
    color: var(--text-muted);
    font-size: var(--font-size-xs);
    padding: var(--spacing-sm);
    transition: color 0.2s;
    background: none;
    border: none;
    cursor: pointer;
}

.nav-item svg {
    width: 24px;
    height: 24px;
}

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

.nav-add {
    background: var(--accent);
    color: white !important;
    width: 56px;
    height: 56px;
    border-radius: var(--radius-full);
    margin-top: -20px;
    box-shadow: var(--shadow-lg);
}

.nav-add svg {
    width: 28px;
    height: 28px;
}

/* Summary Cards */
.summary-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.summary-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    text-align: center;
}

.summary-label {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.summary-value {
    font-size: var(--font-size-md);
    font-weight: 600;
}

.summary-card.over-budget .summary-value {
    color: var(--danger);
}

.summary-card.negative .summary-value {
    color: var(--danger);
}

/* Chart Container */
.chart-container {
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.chart-container h3 {
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.chart-container canvas {
    max-height: 200px;
}

/* Category List */
.category-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.category-item {
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
}

.category-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.category-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
}

.category-icon svg {
    width: 18px;
    height: 18px;
}

.category-details {
    flex: 1;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.category-name {
    font-weight: 500;
}

.category-budget {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.category-progress {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.progress-bar {
    height: 6px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    border-radius: var(--radius-full);
    transition: width 0.3s ease;
}

.progress-fill.warning {
    background: var(--warning) !important;
}

.progress-fill.over {
    background: var(--danger) !important;
}

/* Group Sections */
.group-section {
    margin-bottom: var(--spacing-lg);
}

.group-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
}

.group-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.group-info svg {
    width: 20px;
    height: 20px;
}

.group-name {
    font-weight: 600;
    font-size: var(--font-size-md);
}

.group-total {
    font-weight: 600;
    color: var(--text-secondary);
}

.edit-group-btn,
.edit-category-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    padding: var(--spacing-xs);
    cursor: pointer;
    opacity: 0.5;
    transition: opacity 0.2s;
}

.edit-group-btn:hover,
.edit-category-btn:hover {
    opacity: 1;
}

.edit-group-btn svg,
.edit-category-btn svg {
    width: 16px;
    height: 16px;
}

/* Recent Expenses Section */
.recent-section {
    margin-bottom: var(--spacing-lg);
}

.recent-section h3 {
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-md);
}

.recent-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.recent-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
}

.recent-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.category-icon.small {
    width: 28px;
    height: 28px;
}

.category-icon.small svg {
    width: 14px;
    height: 14px;
}

.recent-details {
    display: flex;
    flex-direction: column;
}

.recent-category {
    font-weight: 500;
    font-size: var(--font-size-sm);
}

.recent-date {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
}

.recent-amount {
    font-weight: 600;
}

/* Categories Actions */
.categories-actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

.categories-actions .btn {
    flex: 1;
}

/* Button Ghost */
.btn-ghost {
    background: none;
    border: 1px dashed var(--border);
    color: var(--text-secondary);
    padding: var(--spacing-sm);
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-xs);
}

.btn-ghost:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.btn-ghost svg {
    width: 14px;
    height: 14px;
}

/* Modal Spacer */
.modal-actions .spacer {
    flex: 1;
}

/* Checkbox Label */
.checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--primary);
}

.progress-text {
    display: flex;
    justify-content: space-between;
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
}

/* Owner Bars */
.owner-bars {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.owner-bar {
    display: grid;
    grid-template-columns: 80px 1fr 80px;
    align-items: center;
    gap: var(--spacing-sm);
}

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

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

.bar {
    height: 100%;
    border-radius: var(--radius-full);
}

.owner-value {
    font-size: var(--font-size-sm);
    text-align: right;
}

/* Budget List */
.budget-total {
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.budget-total .label {
    font-weight: 500;
}

.budget-total .value {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--accent);
}

.budget-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.budget-item {
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.budget-info {
    flex: 1;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.category-name-wrapper {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.recurring-badge {
    color: var(--accent);
    opacity: 0.8;
}

.recurring-badge svg {
    width: 14px;
    height: 14px;
}

.budget-item.recurring {
    border-left: 3px solid var(--accent);
}

.budget-amount {
    font-weight: 600;
    font-size: var(--font-size-md);
}

.budget-edit-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    padding: var(--spacing-sm);
    cursor: pointer;
}

.budget-edit-btn svg {
    width: 18px;
    height: 18px;
}

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

/* Expenses List */
.filter-tabs {
    display: flex;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding-bottom: var(--spacing-xs);
}

.filter-tab {
    background: var(--bg-secondary);
    border: none;
    color: var(--text-secondary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    white-space: nowrap;
    cursor: pointer;
    transition: all 0.2s;
}

.filter-tab.active {
    background: var(--accent);
    color: white;
}

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

.date-header {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    padding: var(--spacing-sm) 0;
    margin-top: var(--spacing-sm);
}

.date-header:first-child {
    margin-top: 0;
}

.expense-item {
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    transition: background 0.2s;
}

.expense-item:active {
    background: var(--bg-tertiary);
}

.expense-info {
    flex: 1;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.expense-details {
    display: flex;
    flex-direction: column;
}

.expense-category {
    font-weight: 500;
}

.expense-description {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
}

.expense-right {
    text-align: right;
}

.expense-amount {
    font-weight: 600;
    display: block;
}

.expense-owner {
    font-size: var(--font-size-xs);
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    background: var(--bg-tertiary);
}

.expense-owner.owner-arthur {
    background: rgba(34, 197, 94, 0.2);
    color: var(--success);
}

.expense-owner.owner-carolina {
    background: rgba(236, 72, 153, 0.2);
    color: #ec4899;
}

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

.empty-state svg {
    width: 48px;
    height: 48px;
    margin-bottom: var(--spacing-md);
    opacity: 0.5;
}

/* Forms */
.form-group {
    margin-bottom: var(--spacing-md);
}

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

.form-group input,
.form-group select {
    width: 100%;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-primary);
    font-size: var(--font-size-md);
    -webkit-appearance: none;
}

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

.form-group.checkbox {
    display: flex;
    align-items: center;
}

.form-group.checkbox label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    margin: 0;
}

.form-group.checkbox input {
    width: auto;
}

.amount-input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.currency-symbol {
    position: absolute;
    left: var(--spacing-md);
    color: var(--text-muted);
    font-weight: 500;
}

.amount-input-wrapper input {
    padding-left: calc(var(--spacing-md) + 20px);
    font-size: var(--font-size-lg);
    font-weight: 600;
}

.amount-input-wrapper.large input {
    font-size: var(--font-size-2xl);
    padding: var(--spacing-lg);
    padding-left: calc(var(--spacing-lg) + 24px);
    text-align: center;
}

.amount-input-wrapper.large .currency-symbol {
    left: var(--spacing-lg);
    font-size: var(--font-size-xl);
}

/* Owner Toggle */
.owner-toggle {
    display: flex;
    gap: var(--spacing-xs);
}

.owner-btn {
    flex: 1;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all 0.2s;
}

.owner-btn.active {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
}

/* Color Picker */
.color-picker {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.color-btn {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    border: 2px solid transparent;
    cursor: pointer;
    transition: transform 0.2s;
}

.color-btn.active {
    border-color: white;
    transform: scale(1.1);
}

/* Month/Year Select */
.month-year-select {
    display: flex;
    gap: var(--spacing-sm);
}

.month-year-select select {
    flex: 1;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-md);
    font-weight: 500;
    border: none;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
}

.btn svg {
    width: 18px;
    height: 18px;
}

.btn-primary {
    background: var(--accent);
    color: white;
}

.btn-primary:active {
    background: var(--accent-light);
}

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

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

.btn-danger {
    background: var(--danger);
    color: white;
}

.btn-block {
    width: 100%;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Modals */
.modal {
    position: fixed;
    inset: 0;
    z-index: 200;
    display: none;
    align-items: flex-end;
    justify-content: center;
}

.modal.open {
    display: flex;
}

.modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    padding: var(--spacing-lg);
    padding-bottom: calc(var(--spacing-lg) + var(--safe-bottom));
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from {
        transform: translateY(100%);
    }
    to {
        transform: translateY(0);
    }
}

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

.modal-header h3 {
    font-size: var(--font-size-lg);
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: var(--spacing-xs);
}

.modal-close svg {
    width: 24px;
    height: 24px;
}

.modal-actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

.modal-actions .btn {
    flex: 1;
}

.modal-actions .btn-danger {
    flex: 0;
    padding: var(--spacing-sm);
}

/* Numeric Keyboard */
.numeric-keyboard {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: var(--spacing-md);
    padding-bottom: calc(var(--spacing-md) + var(--safe-bottom));
    z-index: 300;
    transform: translateY(100%);
    transition: transform 0.3s ease;
}

.numeric-keyboard.open {
    transform: translateY(0);
}

.keyboard-display {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    text-align: right;
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-md);
}

.keyboard-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-sm);
}

.key {
    background: var(--bg-tertiary);
    border: none;
    color: var(--text-primary);
    font-size: var(--font-size-xl);
    padding: var(--spacing-md);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background 0.1s;
}

.key:active {
    background: var(--border);
}

.key-delete {
    color: var(--danger);
}

.key-delete svg {
    width: 24px;
    height: 24px;
}

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

.keyboard-actions .btn {
    flex: 1;
}

/* Settings */
.settings-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.settings-section {
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
}

.settings-section h3 {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-md);
}

.setting-toggle {
    display: flex;
    gap: var(--spacing-sm);
}

.setting-btn {
    flex: 1;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-sm);
}

.setting-btn.active {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
}

.setting-btn .flag {
    font-weight: 600;
}

.exchange-rate-display {
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.rate-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.rate-label {
    color: var(--text-secondary);
}

.rate-value {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--accent);
}

.rate-date {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    margin-top: var(--spacing-xs);
}

/* Login Page */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    min-height: 100dvh;
    padding: var(--spacing-lg);
}

.login-container {
    width: 100%;
    max-width: 360px;
}

.login-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.login-header h1 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-xs);
}

.login-header p {
    color: var(--text-secondary);
}

.login-form {
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
}

/* Flash Messages */
.flash-messages {
    margin-bottom: var(--spacing-md);
}

.flash {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-sm);
}

.flash-error {
    background: rgba(239, 68, 68, 0.2);
    color: var(--danger);
}

.flash-success {
    background: rgba(34, 197, 94, 0.2);
    color: var(--success);
}

/* Animations */
@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.spin {
    animation: spin 1s linear infinite;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 4px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: var(--radius-full);
}

/* Add category button */
.add-category-btn {
    margin-top: var(--spacing-md);
}

.add-category-btn svg {
    width: 18px;
    height: 18px;
}

/* ========================================
   THEME SELECTOR
   ======================================== */

.theme-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-sm);
}

.theme-btn {
    aspect-ratio: 1;
    border-radius: var(--radius-md);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
    overflow: hidden;
    padding: 0;
}

.theme-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--theme-bg) 50%, var(--theme-accent) 50%);
}

.theme-btn::after {
    content: attr(data-label);
    position: absolute;
    bottom: 4px;
    left: 0;
    right: 0;
    font-size: 9px;
    text-align: center;
    color: var(--theme-text);
    font-weight: 500;
    text-shadow: 0 1px 2px rgba(0,0,0,0.3);
}

.theme-btn.active {
    border-color: var(--accent);
    transform: scale(1.05);
    box-shadow: 0 0 0 2px var(--accent);
}

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

/* Theme button colors */
.theme-btn[data-theme="midnight"] {
    --theme-bg: #0f172a;
    --theme-accent: #6366f1;
    --theme-text: #f8fafc;
}

.theme-btn[data-theme="charcoal"] {
    --theme-bg: #18181b;
    --theme-accent: #a855f7;
    --theme-text: #fafafa;
}

.theme-btn[data-theme="forest"] {
    --theme-bg: #0c1a14;
    --theme-accent: #22c55e;
    --theme-text: #f0fdf4;
}

.theme-btn[data-theme="plum"] {
    --theme-bg: #1a0a1e;
    --theme-accent: #e879f9;
    --theme-text: #fdf4ff;
}

.theme-btn[data-theme="snow"] {
    --theme-bg: #f8fafc;
    --theme-accent: #3b82f6;
    --theme-text: #0f172a;
}

.theme-btn[data-theme="sand"] {
    --theme-bg: #faf7f2;
    --theme-accent: #d97706;
    --theme-text: #292524;
}

.theme-btn[data-theme="mint"] {
    --theme-bg: #f0fdfa;
    --theme-accent: #14b8a6;
    --theme-text: #134e4a;
}

.theme-btn[data-theme="lavender"] {
    --theme-bg: #faf5ff;
    --theme-accent: #8b5cf6;
    --theme-text: #3b0764;
}

/* Theme section header */
.theme-section-label {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.theme-section-label:first-child {
    margin-top: 0;
}

/* Smooth theme transition */
body {
    transition: background-color 0.3s ease, color 0.3s ease;
}

.nav-bottom,
.modal-content,
.summary-card,
.category-item,
.budget-item,
.expense-item,
.settings-section,
.login-form {
    transition: background-color 0.3s ease, border-color 0.3s ease;
}