:root {
    --bg-color: #f4f6f8;
    --sidebar-bg: #ffffff;
    --text-primary: #1a1a24;
    --text-secondary: #6b7280;
    --accent-color: #3b82f6;
    --card-bg: rgba(255, 255, 255, 0.7);
    --card-border: rgba(255, 255, 255, 0.5);
    --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
    --radius-lg: 16px;
    --radius-md: 12px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    -webkit-font-smoothing: antialiased;
}

.app-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background-color: var(--sidebar-bg);
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    z-index: 10;
}

.sidebar-header {
    padding: 24px;
    border-bottom: 1px solid #e5e7eb;
}

.sidebar-header h2 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.sidebar-nav {
    padding: 24px 0;
    flex-grow: 1;
}

.sidebar-nav ul {
    list-style: none;
}

.sidebar-nav li a {
    display: block;
    padding: 12px 24px;
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.2s;
}

.sidebar-nav li a:hover {
    background-color: #f3f4f6;
    color: var(--text-primary);
}

.sidebar-nav li.active a {
    background-color: #eff6ff;
    color: var(--accent-color);
    border-right: 4px solid var(--accent-color);
}

/* Main Content */
.main-content {
    flex-grow: 1;
    padding: 40px;
    overflow-y: auto;
}

.main-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 24px;
}

/* Filter Bubbles */
.filter-container {
    margin-bottom: 32px;
}

.filter-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.chip {
    padding: 8px 16px;
    background-color: var(--sidebar-bg);
    border: 1px solid #e5e7eb;
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: var(--shadow-sm);
}

.chip:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.chip.active {
    background-color: var(--text-primary);
    color: #fff;
    border-color: var(--text-primary);
}

/* Scooter Grid */
.scooter-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.scooter-card {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: 24px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 200px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--shadow-sm);
}

.scooter-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: #d1d5db;
}

.card-brand {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.card-model {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    text-align: center;
    margin: 16px 0;
    line-height: 1.1;
}

.card-desc {
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-align: center;
    line-height: 1.4;
}

/* Detail Page */
.detail-header {
    margin-bottom: 32px;
    display: flex;
    align-items: flex-start;
    flex-direction: column;
}

.back-btn {
    background: none;
    border: none;
    color: var(--accent-color);
    font-family: 'Outfit', sans-serif;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    margin-bottom: 24px;
    padding: 8px 16px;
    border-radius: 9999px;
    background-color: #eff6ff;
    transition: all 0.2s;
}

.back-btn:hover {
    background-color: var(--accent-color);
    color: #fff;
}

#detail-scooter-name {
    font-size: 3rem;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 8px;
}

.detail-brand {
    font-size: 1.25rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.detail-cards-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}

.detail-card {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: 32px;
    box-shadow: var(--shadow-sm);
    transition: box-shadow 0.3s ease;
}

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

.detail-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 2px solid #e2e8f0;
    color: var(--accent-color);
}

.detail-card div {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* Battery Table */
.table-container {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    margin-top: 24px;
}

.battery-table {
    width: 100%;
    border-collapse: collapse;
    text-align: center;
}

.battery-table th {
    background-color: var(--sidebar-bg);
    padding: 16px;
    font-weight: 700;
    color: var(--text-primary);
    border-bottom: 2px solid #e2e8f0;
}

.battery-table td {
    padding: 12px 16px;
    border-bottom: 1px solid #e2e8f0;
    color: var(--text-secondary);
}

.battery-table tr:last-child td {
    border-bottom: none;
}

.battery-table tr:nth-child(even) {
    background-color: rgba(255, 255, 255, 0.4);
}

.battery-table tr:hover {
    background-color: rgba(255, 255, 255, 0.8);
}