/* CSS Variables - Modern Dark Mode with Vibrant Accents */
:root {
    /* Primary: Electric Teal (2026 trend) */
    --primary: #00d4aa;
    --primary-dark: #00b894;
    --primary-light: #55efc4;

    /* Danger: Vibrant Coral-Pink */
    --danger: #ff6b9d;
    --danger-dark: #e84a7f;

    /* Success: Bright Mint */
    --success: #00e676;

    /* Warning: Soft Gold */
    --warning: #ffc048;

    /* Dark mode grays */
    --gray-900: #0f0f12;  /* Deepest background */
    --gray-800: #16161a;  /* Card background */
    --gray-700: #1e1e24;  /* Elevated surfaces */
    --gray-600: #2a2a32;  /* Borders */
    --gray-500: #4a4a56;  /* Muted text */
    --gray-400: #72728a;  /* Secondary text */
    --gray-300: #a0a0b8;  /* Body text */
    --gray-200: #ccccd8;  /* Emphasized text */
    --gray-100: #e8e8f0;  /* High contrast text */
    --gray-50: #f4f4f8;   /* Maximum contrast */
    --white: #ffffff;

    /* Shadows for dark mode */
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.6);

    /* Glow effects for accents */
    --glow-primary: 0 0 20px rgba(0, 212, 170, 0.3);

    /* Radii */
    --radius: 8px;
    --radius-lg: 12px;

    /* Layout */
    --nav-height: 56px;
    --header-height: 44px;
}

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

html {
    font-size: 18px;  /* Bumped from 16px for better readability */
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: var(--gray-900);
    min-height: 100vh;
    color: var(--gray-200);
    line-height: 1.5;
    overflow-x: hidden;
}

/* App Container */
#app {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Login Screen */
.login-screen {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
    background: var(--gray-900);
}

.login-container {
    width: 100%;
    max-width: 360px;
    padding: 32px 24px;
    background: var(--gray-800);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.login-container h1 {
    text-align: center;
    color: var(--primary);
    font-size: 1.75rem;
    margin-bottom: 24px;
}

.login-form .form-group {
    margin-bottom: 16px;
}

.login-form .form-group label {
    display: block;
    margin-bottom: 6px;
    color: var(--gray-300);
    font-size: 0.875rem;
}

.login-error {
    background: rgba(255, 107, 157, 0.15);
    color: var(--danger);
    padding: 10px 12px;
    border-radius: var(--radius);
    font-size: 0.875rem;
    margin-bottom: 16px;
    border: 1px solid var(--danger);
}

.login-form button[type="submit"] {
    margin-top: 8px;
}

/* User email in settings */
.user-email {
    color: var(--gray-400);
    font-size: 0.875rem;
    margin-bottom: 12px;
}

/* Offline Indicator (floating) */
.offline-indicator {
    position: fixed;
    top: 12px;
    right: 12px;
    background: var(--warning);
    color: var(--gray-900);
    padding: 6px 12px;
    border-radius: var(--radius);
    font-size: 0.75rem;
    font-weight: 600;
    z-index: 150;
    box-shadow: var(--shadow-md);
}

/* Main Content */
main {
    flex: 1;
    width: 100%;
    padding-top: 0;
    padding-bottom: var(--nav-height);
    overflow-y: auto;
}

/* Screens */
.screen {
    display: none;
    width: 100%;
    padding: 12px;
    min-height: calc(100vh - var(--header-height) - var(--nav-height));
}

.screen.active {
    display: block;
    width: 100%;
}

/* Bottom Navigation */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: var(--gray-800);
    border-top: 1px solid var(--gray-600);
    display: flex;
    justify-content: space-around;
    align-items: center;
    box-shadow: 0 -2px 20px rgba(0, 0, 0, 0.4);
    z-index: 100;
}

.nav-item {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex: 1;
    min-height: 44px;
    padding: 6px 4px;
    color: var(--gray-300);  /* Lighter for better contrast */
    text-decoration: none;
    transition: color 0.2s, background-color 0.2s;
}

.nav-item svg {
    width: 22px;
    height: 22px;
    margin-bottom: 1px;
}

.nav-item span {
    font-size: 0.7rem;
    font-weight: 500;
}

.nav-item.active {
    color: var(--primary);
    background: rgba(0, 212, 170, 0.1);
    border-radius: var(--radius);
}

.nav-item.active::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 50%;
    transform: translateX(-50%);
    width: 24px;
    height: 3px;
    background: var(--primary);
    border-radius: 2px;
    box-shadow: var(--glow-primary);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 12px 24px;
    font-size: 1rem;
    font-weight: 500;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
    -webkit-user-select: none;
    user-select: none;
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background: var(--primary);
    color: #000000;  /* True black for max contrast */
}

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

.btn-secondary {
    background: var(--gray-700);
    color: var(--gray-200);
}

.btn-secondary:hover {
    background: var(--gray-600);
}

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

.btn-danger:hover {
    background: var(--danger-dark);
}

.btn-pink {
    background: #ff6b9d;
    color: #000000;  /* True black for max contrast */
}

.btn-pink:hover {
    background: #ff85b1;
}

.btn-outline-teal {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}

.btn-outline-teal:hover {
    background: rgba(0, 212, 170, 0.1);
}

.btn-dark {
    background: var(--gray-900);
    color: var(--gray-100);
    border: 1px solid var(--gray-700);
}

.btn-dark:hover {
    background: var(--gray-800);
}

.btn-icon {
    min-width: 48px;
    min-height: 48px;
    padding: 12px;
    background: transparent;
    border-radius: 50%;
    color: var(--gray-200);  /* Visible on dark backgrounds */
}

.btn-icon:hover {
    background: var(--gray-700);
}

.btn-block {
    width: 100%;
}

.btn-large {
    min-height: 56px;
    font-size: 1.125rem;
}

.btn-toggle {
    flex: 1;
    background: var(--gray-700);
    color: var(--gray-400);
    border-radius: 0;
}

.btn-toggle:first-child {
    border-radius: var(--radius) 0 0 var(--radius);
}

.btn-toggle:last-child {
    border-radius: 0 var(--radius) var(--radius) 0;
}

.btn-toggle.active {
    background: var(--primary);
    color: #000000;  /* True black for max contrast */
}

.btn-small {
    min-height: 36px;
    padding: 8px 16px;
    font-size: 0.875rem;
}

/* Inputs */
.input, .select, .textarea {
    width: 100%;
    min-height: 48px;
    padding: 12px 16px;
    font-size: 1rem;
    border: 1px solid var(--gray-600);
    border-radius: var(--radius);
    background: var(--gray-800);
    color: var(--gray-100);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.input:focus, .select:focus, .textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 212, 170, 0.2);
}

.input-large {
    min-height: 56px;
    font-size: 1.5rem;
    font-weight: 600;
    text-align: center;
}

.textarea {
    min-height: 80px;
    resize: vertical;
}

/* Form Groups */
.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gray-600);
}

/* Entry Screen */
#entry-categories {
    display: flex;
    flex-direction: column;
    gap: 16px;
    padding-bottom: 16px;
}

.category-card {
    background: var(--gray-800);
    border-radius: var(--radius-lg);
    padding: 16px;
    box-shadow: var(--shadow);
    border: 1px solid var(--gray-700);
}

.category-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.category-card-header h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-100);
}

.category-amount-input {
    width: 100%;
    margin-bottom: 12px;
}

.subcategory-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 12px;
}

.subcategory-btn {
    min-height: 40px;
    padding: 8px 16px;
    font-size: 0.875rem;
    border: 2px solid transparent;
    border-radius: 20px;
    transition: all 0.15s ease;
}

.note-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--gray-500);
    font-size: 0.875rem;
    cursor: pointer;
    padding: 8px 0;
}

.note-toggle svg {
    transition: transform 0.2s;
}

.note-toggle.expanded svg {
    transform: rotate(180deg);
}

.note-input-container {
    display: none;
    margin-top: 8px;
}

.note-input-container.visible {
    display: block;
}

#save-entry-btn {
    position: sticky;
    bottom: 16px;
    width: 100%;
    box-shadow: var(--shadow-lg);
}

/* Summary Screen */
.month-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    background: var(--gray-800);
    padding: 4px;
    border-radius: var(--radius);
    margin-bottom: 10px;
    box-shadow: var(--shadow);
    border: 1px solid var(--gray-700);
}

.month-nav span {
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-100);
}

.month-nav .btn-icon {
    min-width: 40px;
    min-height: 40px;
    padding: 8px;
}

.filter-bar {
    width: 100%;
    margin-bottom: 10px;
}

.filter-bar .select {
    width: 100%;
}

.entries-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
    width: 100%;
    margin-bottom: 16px;
}

.date-group {
    width: 100%;
    background: var(--gray-800);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    border: 1px solid var(--gray-700);
}

.date-header {
    display: flex;
    justify-content: space-between;
    padding: 12px 16px;
    background: var(--gray-700);
    border-bottom: 1px solid var(--gray-600);
}

.date-header-date {
    font-weight: 600;
    color: var(--gray-100);
}

.date-header-total {
    font-weight: 600;
    color: var(--primary);
}

.entry-item {
    display: flex;
    align-items: center;
    padding: 12px 16px;
    border-bottom: 1px solid var(--gray-700);
    cursor: pointer;
    transition: background-color 0.2s;
}

.entry-item:last-child {
    border-bottom: none;
}

.entry-item:active {
    background: var(--gray-700);
}

.entry-info {
    flex: 1;
    min-width: 0;
}

.entry-category {
    font-weight: 500;
    color: var(--gray-100);
}

.entry-subcategory {
    font-size: 0.875rem;
    color: var(--gray-400);
}

.entry-note-preview {
    font-size: 0.8rem;
    color: var(--gray-500);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.entry-amount {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--primary);
    margin-left: 16px;
}

.summary-footer {
    width: 100%;
    background: var(--gray-800);
    border-radius: var(--radius-lg);
    padding: 16px;
    box-shadow: var(--shadow);
    border: 1px solid var(--gray-700);
}

.monthly-total {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    font-size: 1.125rem;
}

.monthly-total span:last-child {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.empty-state {
    text-align: center;
    padding: 48px 24px;
    color: var(--gray-500);
}

.empty-state svg {
    width: 64px;
    height: 64px;
    margin-bottom: 16px;
    opacity: 0.5;
}

/* Charts Screen */
.chart-toggle {
    display: flex;
    width: 100%;
    margin-bottom: 10px;
}

.chart-toggle .btn-toggle {
    min-height: 40px;
}

.chart-filter {
    width: 100%;
    margin-bottom: 10px;
}

.chart-filter .select {
    width: 100%;
    min-height: 40px;
}

/* Chart controls row - month nav + category filter side by side */
.chart-controls-row {
    display: flex;
    gap: 10px;
    margin-bottom: 8px;
}

.chart-nav-inline {
    display: flex;
    align-items: center;
    background: var(--gray-800);
    padding: 4px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--gray-700);
    flex: 1;
}

.chart-nav-inline span {
    flex: 1;
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--gray-100);
    text-align: center;
}

.chart-nav-inline .btn-icon {
    min-width: 40px;
    min-height: 40px;
    padding: 8px;
}

.chart-category-select {
    flex: 1;
    min-height: 48px;
}

.tip-centered {
    justify-content: center;
    margin-bottom: 12px;
}

.chart-container {
    width: 100%;
    max-width: 350px;
    margin: 0 auto 16px auto;
    background: var(--gray-800);
    border-radius: var(--radius-lg);
    padding: 16px;
    box-shadow: var(--shadow);
    border: 1px solid var(--gray-700);
    aspect-ratio: 1;
}

/* Bar Chart Styles */
.bar-chart-container {
    width: 100%;
    background: var(--gray-800);
    border-radius: var(--radius-lg);
    padding: 16px;
    margin-bottom: 16px;
    box-shadow: var(--shadow);
    border: 1px solid var(--gray-700);
}

.bar-chart-scroll {
    max-height: none;
    overflow-y: visible;
}

.bar-row {
    padding: 12px 0;
    border-bottom: 1px solid var(--gray-700);
}

.bar-row:last-child {
    border-bottom: none;
}

.bar-track {
    width: 100%;
    height: 32px;
    background: var(--gray-700);
    border-radius: 6px;
    overflow: hidden;
    margin-bottom: 6px;
}

.bar-fill {
    height: 100%;
    border-radius: 6px;
    transition: width 0.3s ease;
    min-width: 4px;
}

.bar-stacked {
    display: flex;
}

.bar-segment {
    height: 100%;
    min-width: 4px;
}

.bar-segment:first-child {
    border-radius: 6px 0 0 6px;
}

.bar-segment:last-child {
    border-radius: 0 6px 6px 0;
}

.bar-segment:only-child {
    border-radius: 6px;
}

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

.bar-label {
    font-size: 0.875rem;
    color: var(--gray-400);
}

.bar-value {
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-100);
}

.category-breakdown {
    width: 100%;
    background: var(--gray-800);
    border-radius: var(--radius-lg);
    padding: 16px;
    box-shadow: var(--shadow);
    border: 1px solid var(--gray-700);
}

.breakdown-item {
    display: flex;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid var(--gray-700);
}

.breakdown-item:last-child {
    border-bottom: none;
}

.breakdown-color {
    width: 16px;
    height: 16px;
    border-radius: 4px;
    margin-right: 12px;
}

.breakdown-name {
    flex: 1;
    font-weight: 500;
}

.breakdown-amount {
    font-weight: 600;
    color: var(--gray-100);
}

.breakdown-percent {
    width: 60px;
    text-align: right;
    color: var(--gray-400);
    font-size: 0.875rem;
}

/* Tips */
.tip {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.8rem;
    color: var(--gray-400);
}

.tip svg {
    flex-shrink: 0;
    width: 14px;
    height: 14px;
}

.tip-standalone {
    background: var(--gray-800);
    border: 1px solid var(--gray-700);
    border-radius: var(--radius);
    padding: 8px 10px;
    margin-bottom: 10px;
}

/* Filter row - combines dropdown and tip */
.filter-row {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 10px;
}

.filter-row .select {
    flex: 1;
    min-height: 40px;
}

.filter-row .tip {
    flex-shrink: 0;
    max-width: 50%;
}

/* Glance Screen - Calendar View */
.calendar-grid {
    background: var(--gray-800);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    border: 1px solid var(--gray-700);
    overflow: hidden;
}

.calendar-header {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    background: var(--gray-700);
    border-bottom: 1px solid var(--gray-600);
}

.calendar-header span {
    padding: 8px 4px;
    text-align: center;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--gray-300);
    text-transform: uppercase;
}

.calendar-days {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
}

.calendar-day {
    min-height: 70px;
    padding: 4px;
    border-right: 1px solid var(--gray-700);
    border-bottom: 1px solid var(--gray-700);
    display: flex;
    flex-direction: column;
    background: var(--gray-800);
    transition: background-color 0.15s;
}

.calendar-day:nth-child(7n) {
    border-right: none;
}

.calendar-day.empty {
    background: var(--gray-900);
}

.calendar-day.has-entries {
    cursor: pointer;
}

.calendar-day.has-entries:hover {
    background: var(--gray-700);
}

.calendar-day.today {
    background: rgba(0, 212, 170, 0.15);
}

.calendar-day.today .calendar-day-number {
    background: var(--primary);
    color: #000000;  /* True black */
    border-radius: 50%;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.calendar-day.selected {
    background: rgba(0, 212, 170, 0.2);
    box-shadow: inset 0 0 0 2px var(--primary);
}

.calendar-day-number {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gray-200);
    margin-bottom: 2px;
}

.calendar-spending {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    gap: 2px;
}

.calendar-dots {
    display: flex;
    flex-wrap: wrap;
    gap: 3px;
}

.calendar-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

.calendar-amount {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--primary);
}

/* Calendar Detail Panel */
.calendar-detail {
    margin-top: 12px;
}

.calendar-detail:empty {
    display: none;
}

.detail-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    background: var(--primary);
    color: #000000;  /* True black */
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.detail-date {
    font-weight: 600;
}

.detail-total {
    font-size: 1.125rem;
    font-weight: 700;
}

.detail-entries {
    background: var(--gray-800);
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    box-shadow: var(--shadow);
    padding: 8px 0;
    border: 1px solid var(--gray-700);
    border-top: none;
}

.detail-category {
    padding: 8px 16px;
    border-bottom: 1px solid var(--gray-700);
}

.detail-category:last-child {
    border-bottom: none;
}

.detail-category-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 4px;
}

.detail-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    flex-shrink: 0;
}

.detail-category-name {
    flex: 1;
    font-weight: 600;
    color: var(--gray-100);
}

.detail-category-total {
    font-weight: 600;
    color: var(--primary);
}

.detail-entry {
    display: flex;
    justify-content: space-between;
    padding: 4px 0 4px 22px;
    font-size: 0.875rem;
    color: var(--gray-300);
}

.detail-entry-sub {
    flex: 1;
}

.detail-entry-amount {
    color: var(--gray-200);
}

.detail-entry-note {
    padding: 2px 0 4px 22px;
    font-size: 0.8rem;
    color: var(--gray-500);
    font-style: italic;
}

/* Settings Screen */
.settings-section {
    background: var(--gray-800);
    border-radius: var(--radius-lg);
    padding: 16px;
    margin-bottom: 16px;
    box-shadow: var(--shadow);
    border: 1px solid var(--gray-700);
}

.settings-section h2 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-100);
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--gray-600);
}

.settings-list {
    margin-bottom: 16px;
}

.settings-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 0;
    border-bottom: 1px solid var(--gray-700);
}

.settings-item:last-child {
    border-bottom: none;
}

.settings-item-name {
    font-weight: 500;
    color: var(--gray-100);
}

.settings-item-actions {
    display: flex;
    gap: 8px;
}

.settings-item-actions .btn-icon {
    min-width: 40px;
    min-height: 40px;
    padding: 8px;
}

/* Category settings card with inline subcategories */
.category-settings-card {
    background: var(--gray-700);
    border-radius: var(--radius);
    padding: 12px;
    margin-bottom: 12px;
}

.category-settings-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 8px;
}

.subcategories-inline {
    padding-left: 4px;
}

.subcategory-hint {
    font-size: 0.875rem;
    color: var(--gray-500);
    margin-bottom: 8px;
}

.subcategory-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 8px;
}

.subcategory-chip {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: var(--gray-600);
    color: var(--gray-200);
    padding: 4px 8px 4px 12px;
    border-radius: 16px;
    font-size: 0.875rem;
}

.chip-delete {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    border: none;
    background: transparent;
    color: var(--gray-400);
    cursor: pointer;
    border-radius: 50%;
    padding: 0;
}

.chip-delete:hover {
    background: var(--gray-500);
    color: var(--gray-200);
}

.add-subcategory-inline {
    display: flex;
    gap: 8px;
}

.add-subcategory-inline .input {
    flex: 1;
}

.input-small {
    min-height: 36px;
    padding: 8px 12px;
    font-size: 0.875rem;
}

.file-input-label {
    cursor: pointer;
}

.file-input-label input {
    display: none;
}

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
    z-index: 200;
}

.modal {
    background: var(--gray-800);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 400px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--gray-700);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px;
    border-bottom: 1px solid var(--gray-700);
}

.modal-header h2 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--gray-100);
}

.modal-body {
    padding: 16px;
}

.modal-footer {
    display: flex;
    gap: 12px;
    padding: 16px;
    border-top: 1px solid var(--gray-700);
}

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

/* Utilities */
.hidden {
    display: none !important;
}

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

/* Toast Notifications */
.toast {
    position: fixed;
    bottom: calc(var(--nav-height) + 16px);
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--gray-700);
    color: var(--gray-100);
    padding: 12px 24px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--gray-600);
    z-index: 300;
    opacity: 0;
    transition: transform 0.3s, opacity 0.3s;
}

.toast.visible {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.toast.success {
    background: var(--success);
    color: var(--gray-900);  /* Dark text on bright green */
}

.toast.error {
    background: var(--danger);
}

/* Responsive - constrain width on larger screens */
@media (min-width: 900px) {
    main {
        width: 100%;
        max-width: 800px;
        margin: 0 auto;
    }

    .bottom-nav {
        max-width: 800px;
        left: 50%;
        transform: translateX(-50%);
        border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    }

    .chart-container {
        max-height: 400px;
    }
}

/* Safe area insets for notched phones */
@supports (padding: max(0px)) {
    main {
        padding-top: max(12px, env(safe-area-inset-top));
    }

    .bottom-nav {
        padding-bottom: max(0px, env(safe-area-inset-bottom));
        height: calc(var(--nav-height) + max(0px, env(safe-area-inset-bottom)));
    }

    main {
        padding-bottom: calc(var(--nav-height) + max(0px, env(safe-area-inset-bottom)));
    }
}

/* Color palette for charts */
.chart-colors {
    --chart-1: #3b82f6;
    --chart-2: #ef4444;
    --chart-3: #22c55e;
    --chart-4: #f59e0b;
    --chart-5: #8b5cf6;
    --chart-6: #ec4899;
    --chart-7: #14b8a6;
    --chart-8: #f97316;
    --chart-9: #6366f1;
    --chart-10: #84cc16;
}