/* Reset and Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #3498db;
    --primary-dark: #2980b9;
    --secondary-color: #2ecc71;
    --danger-color: #e74c3c;
    --warning-color: #f39c12;
    --text-color: #333;
    --text-light: #666;
    --bg-color: #f5f5f5;
    --card-bg: #fff;
    --border-color: #ddd;
    --nav-height: 70px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    min-height: 100vh;
    padding-top: 48px;
    padding-bottom: calc(var(--nav-height) + 10px);
}

/* Top Bar */
.top-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 48px;
    background: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    z-index: 1000;
}

.top-bar-content {
    max-width: 960px;
    margin: 0 auto;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 0.75rem;
}

.top-bar-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--primary-color);
    text-decoration: none;
}

.lang-switch {
    display: flex;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    overflow: hidden;
}

.lang-switch a {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.3rem 0.75rem;
    font-size: 0.8rem;
    font-weight: 500;
    text-decoration: none;
    color: var(--text-light);
    background: var(--card-bg);
    transition: background-color 0.2s, color 0.2s;
}

.lang-switch a:first-child {
    border-right: 1px solid var(--border-color);
}

.lang-switch a.active {
    background: var(--primary-color);
    color: white;
}

.lang-switch a:hover:not(.active) {
    background: var(--bg-color);
}

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

.top-bar-user {
    font-size: 0.8rem;
    color: var(--text-light);
    max-width: 120px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.logout-form {
    margin: 0;
}

.logout-btn {
    background: none;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    color: var(--text-light);
    cursor: pointer;
    transition: background-color 0.2s, color 0.2s;
}

.logout-btn:hover {
    background: var(--bg-color);
    color: var(--danger-color);
}

/* Container */
.container {
    max-width: 100%;
    padding: 0.75rem;
    margin: 0 auto;
}

@media (min-width: 768px) {
    .container {
        max-width: 720px;
        padding: 1rem;
    }
}

@media (min-width: 1024px) {
    .container {
        max-width: 960px;
    }
}

/* Bottom Navigation */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    /*height: var(--nav-height);*/
    display: flex;
    justify-content: space-around;
    align-items: center;
    background: var(--card-bg);
    border-top: 1px solid var(--border-color);
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
    z-index: 1000;
}

.bottom-nav a {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    color: var(--text-light);
    padding: 0.75rem 1rem;
    transition: color 0.2s;
    min-width: 60px;
}

.bottom-nav a.active,
.bottom-nav a:hover {
    color: var(--primary-color);
}

.bottom-nav .icon {
    font-size: 1.4rem;
    margin-bottom: 0.35rem;
}

.bottom-nav span:last-child {
    font-size: 0.7rem;
    font-weight: 500;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
}

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

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

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

.btn-secondary {
    background-color: var(--text-light);
    color: white;
}

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

.btn-nav {
    background: none;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    width: 36px;
    height: 36px;
    cursor: pointer;
    font-size: 1rem;
}

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

/* Welcome Section */
.welcome-section {
    text-align: center;
    padding: 3rem 1rem;
}

.welcome-section h1 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.welcome-section p {
    margin-bottom: 2rem;
    color: var(--text-light);
}

/* Car Info Header */
.car-info-header {
    text-align: center;
    padding: 0.75rem;
    background: var(--card-bg);
    border-radius: 12px;
    margin-bottom: 0.75rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.car-info-header h2 {
    font-size: 1.25rem;
    margin-bottom: 0.25rem;
}

.car-year {
    font-size: 0.875rem;
    color: var(--text-light);
}

/* Calendar */
.calendar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem;
    background: var(--card-bg);
    border-radius: 12px;
    margin-bottom: 0.5rem;
}

.calendar-header h3 {
    font-size: 1.125rem;
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 2px;
    background: var(--card-bg);
    border-radius: 12px 12px 0 0;
    padding: 0.5rem;
}

.weekday {
    text-align: center;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-light);
    padding: 0.5rem;
}

.weekday:first-child {
    color: var(--danger-color);
}

.weekday:last-child {
    color: var(--primary-color);
}

.calendar-days {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 2px;
    background: var(--card-bg);
    border-radius: 0 0 12px 12px;
    padding: 0.5rem;
}

.calendar-day {
    aspect-ratio: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    padding: 2px;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.2s;
    font-size: 0.875rem;
    overflow: hidden;
}

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

.calendar-day.today {
    background-color: var(--primary-color);
    color: white;
}

.calendar-day.other-month {
    color: var(--border-color);
}

.calendar-day.sunday {
    color: var(--danger-color);
}

.calendar-day.saturday {
    color: var(--primary-color);
}

.calendar-day.today.sunday,
.calendar-day.today.saturday {
    color: white;
}

.day-number {
    font-weight: 500;
}

.day-icons {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0;
    margin-top: 1px;
    font-size: 1.1rem;
    justify-items: center;
    align-items: center;
    width: 100%;
    flex: 1;
}

.day-icons span {
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.day-icons .more-indicator {
    font-size: 0.8rem;
    color: var(--text-light);
    font-weight: bold;
}

/* Forms */
.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.2s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
}

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23666' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    padding-right: 2.5rem;
}

/* Cards */
.card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.card-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

/* Page Header */
.page-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.page-header h1 {
    font-size: 1.25rem;
}

@media (min-width: 768px) {
    .page-header {
        margin-bottom: 1.5rem;
    }

    .page-header h1 {
        font-size: 1.5rem;
    }
}

.back-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    text-decoration: none;
    color: var(--text-color);
    background: var(--card-bg);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

/* Expense List */
.expense-list {
    list-style: none;
}

.expense-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
}

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

.expense-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.expense-icon {
    font-size: 1.5rem;
}

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

.expense-desc {
    font-size: 0.875rem;
    color: var(--text-light);
}

.expense-amount {
    font-weight: 600;
    color: var(--danger-color);
}

/* Total Card */
.total-card {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
}

.total-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1.1rem;
}

.total-row .total-amount {
    font-size: 1.5rem;
    font-weight: 700;
}

/* Mileage Card */
.mileage-card {
    background: linear-gradient(135deg, #2ecc71, #27ae60);
    color: white;
    padding: 1rem;
}

.mileage-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
    font-weight: 600;
    font-size: 1rem;
}

.mileage-icon {
    font-size: 1.25rem;
}

.mileage-input-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.mileage-info {
    display: flex;
    flex-direction: column;
    min-width: 100px;
}

.mileage-label {
    font-size: 0.7rem;
    opacity: 0.9;
}

.mileage-value {
    font-size: 0.9rem;
    font-weight: 600;
}

.mileage-input-group {
    display: flex;
    align-items: center;
    flex: 1;
    min-width: 120px;
    background: white;
    border-radius: 8px;
    overflow: hidden;
}

.mileage-input-group .form-control {
    border: none;
    border-radius: 0;
    color: var(--text-color);
    padding: 0.5rem 0.75rem;
    font-size: 0.9rem;
}

.mileage-input-group .form-control:focus {
    outline: none;
    box-shadow: none;
}

.mileage-input-group .input-suffix {
    padding: 0 0.75rem;
    color: var(--text-light);
    font-size: 0.85rem;
    background: #f5f5f5;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
}

/* Category Grid */
.category-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

@media (min-width: 768px) {
    .category-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.category-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1rem;
    background: var(--card-bg);
    border-radius: 12px;
    text-decoration: none;
    color: var(--text-color);
    transition: transform 0.2s, box-shadow 0.2s;
}

.category-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.category-item .icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.category-item span {
    font-size: 0.875rem;
}

/* Add Button */
.add-btn {
    position: fixed;
    bottom: calc(var(--nav-height) + 1rem);
    right: 1rem;
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: var(--primary-color);
    color: white;
    border: none;
    font-size: 1.75rem;
    line-height: 1;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.4);
    transition: transform 0.2s, box-shadow 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    z-index: 100;
}

.add-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 16px rgba(52, 152, 219, 0.5);
}

@media (min-width: 768px) {
    .add-btn {
        bottom: calc(var(--nav-height) + 1.5rem);
        right: 1.5rem;
        width: 56px;
        height: 56px;
        font-size: 2rem;
    }
}

/* Maintenance List */
.maintenance-list {
    list-style: none;
}

.maintenance-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
}

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

.maintenance-info h4 {
    font-size: 1rem;
    margin-bottom: 0.25rem;
}

.maintenance-info p {
    font-size: 0.875rem;
    color: var(--text-light);
}

.maintenance-actions {
    display: flex;
    gap: 0.5rem;
}

.btn-icon {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-icon.delete {
    background: #fee;
    color: var(--danger-color);
}

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

/* Settings */
.settings-list {
    list-style: none;
}

.settings-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    text-decoration: none;
    color: var(--text-color);
}

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

.settings-item:hover {
    background: var(--bg-color);
}

.settings-item span:last-child {
    color: var(--text-light);
}

/* Utility */
.text-center {
    text-align: center;
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }

/* Empty State */
.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-light);
}

.empty-state .icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

/* Badge */
.badge {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    border-radius: 4px;
    background: var(--bg-color);
    color: var(--text-light);
}

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

.badge-success {
    background: var(--secondary-color);
    color: white;
}

/* Year/Month Picker */
.year-month-picker {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.picker-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
}

.picker-content {
    position: relative;
    background: var(--card-bg);
    border-radius: 16px;
    padding: 1.5rem;
    width: 90%;
    max-width: 320px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

.picker-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    padding: 0 0.5rem;
}

.picker-header span {
    font-size: 1.25rem;
    font-weight: 600;
}

.picker-nav {
    width: 36px;
    height: 36px;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    background: var(--card-bg);
    cursor: pointer;
    font-size: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.picker-nav:hover {
    background: var(--bg-color);
}

.picker-months {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.5rem;
}

.picker-month {
    padding: 0.75rem 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--card-bg);
    cursor: pointer;
    font-size: 0.875rem;
    transition: all 0.2s;
}

.picker-month:hover {
    background: var(--bg-color);
    border-color: var(--primary-color);
}

.picker-month.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* Calendar header clickable */
.calendar-header h3 {
    cursor: pointer;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    transition: background-color 0.2s;
}

.calendar-header h3:hover {
    background-color: var(--bg-color);
}

/* Car List */
.car-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.car-card {
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    overflow: hidden;
    transition: transform 0.2s, box-shadow 0.2s;
}

.car-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}

.car-card-link {
    display: flex;
    align-items: center;
    padding: 1rem;
    text-decoration: none;
    color: var(--text-color);
}

.car-card-icon {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--bg-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-right: 1rem;
    flex-shrink: 0;
}

.car-card-info {
    flex: 1;
}

.car-card-info h3 {
    font-size: 1rem;
    margin-bottom: 0.25rem;
}

.car-card-year {
    font-size: 0.875rem;
    color: var(--text-light);
    margin: 0;
}

.car-card-mileage {
    font-size: 0.75rem;
    color: var(--primary-color);
    margin: 0;
}

.car-card-arrow {
    color: var(--text-light);
    font-size: 1.25rem;
}

/* Car Type Badge */
.car-type-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 500;
}

.car-type-badge.gasoline {
    background: #fff3e0;
    color: #e65100;
}

.car-type-badge.electric {
    background: #e3f2fd;
    color: #1565c0;
}

.car-info-row {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
}

/* Statistics Page */
.period-selector {
    margin-bottom: 1rem;
}

.period-selector .form-row {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.period-selector .form-group {
    flex: 1;
    margin-bottom: 0;
}

.period-selector .btn {
    width: 100%;
}

.stats-total {
    text-align: center;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
}

.stats-total h3 {
    font-size: 0.875rem;
    font-weight: 500;
    opacity: 0.9;
    margin-bottom: 0.5rem;
}

.total-amount {
    font-size: 2rem;
    font-weight: 700;
}

.chart-container {
    margin-bottom: 2rem;
}

.chart-container:last-child {
    margin-bottom: 0;
}

.chart-container h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-light);
}

.chart-container canvas {
    max-height: 300px;
}

/* Statistics Car Card */
.car-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.car-manufacturer {
    font-weight: 600;
    color: var(--text-color);
}

.car-model {
    color: var(--text-light);
}

.car-details {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.25rem;
    font-size: 0.875rem;
    color: var(--text-light);
}

.car-type {
    padding: 0.125rem 0.5rem;
    background: var(--bg-color);
    border-radius: 4px;
    font-size: 0.75rem;
}

/* Statistics Car Card in List */
.car-list .car-card {
    padding: 1rem;
}

.car-list .car-card:hover {
    background: var(--bg-color);
}

/* Report Page */
.report-section {
    margin-bottom: 1rem;
}

.report-section .section-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.report-section .section-icon {
    font-size: 1.25rem;
}

/* Mileage Summary in Report */
.mileage-summary {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.mileage-summary .mileage-item {
    display: flex;
    flex-direction: column;
    padding: 0.75rem;
    background: var(--bg-color);
    border-radius: 8px;
}

.mileage-summary .mileage-item.highlight {
    background: linear-gradient(135deg, #2ecc71, #27ae60);
    color: white;
    grid-column: 1 / -1;
}

.mileage-summary .mileage-label {
    font-size: 0.75rem;
    color: var(--text-light);
    margin-bottom: 0.25rem;
}

.mileage-summary .mileage-item.highlight .mileage-label {
    color: rgba(255, 255, 255, 0.9);
}

.mileage-summary .mileage-value {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-color);
}

.mileage-summary .mileage-value.secondary {
    font-size: 0.95rem;
    color: var(--text-light);
}

.mileage-summary .mileage-item.highlight .mileage-value {
    color: white;
    font-size: 1.25rem;
}

/* Expense Total Row in Report */
.expense-total-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    border-radius: 8px;
}

.expense-total-amount {
    font-size: 1.5rem;
    font-weight: 700;
}

/* Category List in Report */
.category-list {
    list-style: none;
}

.category-list .category-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
}

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

.category-list .category-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.category-list .category-icon {
    font-size: 1.25rem;
    width: 32px;
    text-align: center;
}

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

.category-list .category-amount-info {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

.category-list .category-amount {
    font-weight: 600;
    color: var(--danger-color);
}

.category-list .category-percentage {
    font-size: 0.75rem;
    color: var(--text-light);
}