:root {
    --bg: #f8f9fa;
    --surface: #ffffff;
    --surface-muted: #f9fafb;
    --border: #e5e7eb;
    --text: #111827;
    --muted: #6b7280;
    --accent: #e10600;
    --accent-dark: #b80500;
    --accent-soft: rgba(225, 6, 0, 0.08);
    --link: #2563eb;
    --success: #16a34a;
    --warning: #d97706;
    --danger: #dc2626;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 4px 15px rgba(0, 0, 0, 0.1);
}

* {
    box-sizing: border-box;
}

html,
body {
    min-height: 100%;
}

body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
}

a {
    color: inherit;
}

button,
input,
select,
textarea {
    font: inherit;
}

[hidden] {
    display: none !important;
}

.navbar {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 15px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
}

.navbar__left {
    display: flex;
    align-items: center;
    gap: 30px;
    flex-wrap: wrap;
}

.logo {
    font-size: 20px;
    font-weight: 700;
    text-decoration: none;
    color: var(--text);
    letter-spacing: 0.01em;
}

.logo span {
    color: var(--accent);
}

.nav-links {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.nav-links a {
    text-decoration: none;
    color: var(--muted);
    font-weight: 500;
    padding: 4px 0;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--accent);
}

.nav-auth,
.logout-btn {
    background: transparent;
    border: 1px solid var(--border);
    padding: 8px 16px;
    border-radius: 6px;
    cursor: pointer;
    color: var(--text);
    transition: background 0.2s ease, border-color 0.2s ease;
}

.nav-auth:hover,
.logout-btn:hover,
.page-btn:hover:not(:disabled),
.search-btn:hover,
.btn-primary:hover,
.action-btn:hover,
.auth-submit:hover {
    background: var(--surface-muted);
}

.page-shell {
    padding: 30px 20px 50px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.container.narrow {
    max-width: 900px;
}

.header-section,
.header-row,
.driver-header,
.constructor-header,
.race-header,
.circuit-header {
    margin-bottom: 20px;
}

.header-section--split,
.driver-header,
.constructor-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
    flex-wrap: wrap;
}

.back-link {
    text-decoration: none;
    color: var(--muted);
    font-size: 14px;
    display: inline-block;
    margin-bottom: 10px;
}

.back-link:hover {
    color: #000;
}

.page-title,
.race-title,
.circuit-title {
    margin: 0;
    color: var(--text);
}

.page-title {
    margin-bottom: 30px;
}

.page-title,
.race-title,
.circuit-title {
    font-size: 28px;
    line-height: 1.15;
}

.section-title,
.card h2,
.card h3 {
    margin-top: 0;
    color: var(--text);
}

.section-title {
    font-size: 20px;
    margin-bottom: 15px;
}

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
    margin-bottom: 20px;
}

.card--padded {
    padding: 20px;
}

.card h2,
.card h3 {
    padding: 20px 20px 0;
    margin: 0 0 16px;
}

.card > table {
    margin-top: 0;
}

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 30px;
}

.grid-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: var(--surface);
    padding: 20px;
    border: 1px solid var(--border);
    border-radius: 8px;
    text-align: center;
    box-shadow: var(--shadow);
}

.stat-card .num {
    font-size: 28px;
    font-weight: 700;
    color: var(--accent);
    margin-top: 5px;
}

.stat-card .label {
    font-size: 12px;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.search-container {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.search-input {
    padding: 10px 15px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 14px;
    width: min(320px, 100%);
    background: #fff;
}

.search-input:focus,
.input-group input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(225, 6, 0, 0.1);
}

.search-btn,
.btn-primary,
.action-btn,
.auth-submit {
    background: var(--accent);
    color: #fff;
    border: none;
    padding: 10px 20px;
    border-radius: 6px;
    font-weight: 700;
    cursor: pointer;
    transition: background 0.2s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.search-btn:hover,
.btn-primary:hover,
.action-btn:hover,
.auth-submit:hover {
    background: var(--accent-dark);
}

.page-btn {
    background: #fff;
    border: 1px solid var(--border);
    padding: 6px 12px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    color: var(--text);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.page-btn:disabled {
    color: #9ca3af;
    background: #f3f4f6;
    cursor: not-allowed;
    border-color: var(--border);
}

.page-info {
    font-size: 14px;
    color: var(--muted);
}

.pagination {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    padding: 15px 20px;
    background: var(--surface-muted);
    border-top: 1px solid var(--border);
}

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

th,
td {
    padding: 12px 20px;
    border-bottom: 1px solid #f3f4f6;
    text-align: left;
    vertical-align: top;
}

th {
    color: var(--muted);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    background: #fafafa;
}

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

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

.driver-link,
.constructor-link,
.race-link,
.circuit-link,
.wiki-link {
    color: var(--accent);
    text-decoration: none;
    font-weight: 700;
}

.driver-link:hover,
.constructor-link:hover,
.race-link:hover,
.circuit-link:hover,
.wiki-link:hover {
    text-decoration: underline;
}

.wiki-link {
    display: inline-block;
    margin-top: 10px;
    font-weight: 500;
    color: var(--link);
}

.badge-dnf {
    background-color: #fee2e2;
    color: var(--danger);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 700;
}

.badge-win {
    background-color: #fef3c7;
    color: var(--warning);
    padding: 4px 8px;
    border-radius: 4px;
    font-weight: 700;
}

.position-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 44px;
    padding: 4px 10px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.04em;
}

.position-badge--gold {
    background: #fef3c7;
    color: #92400e;
}

.position-badge--silver {
    background: #e5e7eb;
    color: #4b5563;
}

.position-badge--bronze {
    background: #f3e1d4;
    color: #7c3f12;
}

.action-buttons {
    margin-top: 20px;
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.auth-page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.main-wrapper {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px 0 40px;
}

.auth-card,
.login-container,
.register-container {
    background: var(--surface);
    padding: 30px;
    border-radius: 10px;
    box-shadow: var(--shadow-lg);
    width: min(360px, calc(100vw - 40px));
}

.auth-card h2,
.login-container h2,
.register-container h2 {
    text-align: center;
    margin: 0 0 20px;
    color: var(--text);
}

.input-group {
    margin-bottom: 15px;
}

.input-group label {
    display: block;
    margin-bottom: 5px;
    color: var(--muted);
}

.input-group input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid #ddd;
    border-radius: 6px;
    background: #fff;
}

.auth-submit {
    width: 100%;
}

.auth-link,
.register-link,
.login-link {
    text-align: center;
    margin-top: 15px;
    font-size: 14px;
    color: var(--muted);
}

.auth-link a,
.register-link a,
.login-link a {
    color: var(--link);
    text-decoration: none;
    font-weight: 700;
}

.auth-link a:hover,
.register-link a:hover,
.login-link a:hover {
    text-decoration: underline;
}

.message,
#status-message {
    font-size: 16px;
    color: #4b5563;
}

.message {
    margin-top: 15px;
    text-align: center;
    font-weight: 700;
}

.message--error {
    color: var(--danger);
}

.message--success {
    color: var(--success);
}

.message--info {
    color: var(--link);
}

.circuit-meta,
.race-meta,
.constructor-meta,
.driver-meta,
#driver-nat,
#constructor-nat {
    color: var(--muted);
    margin: 0;
}

.action-bar {
    display: flex;
    justify-content: flex-start;
    margin-top: 20px;
}

.page-btn--inline {
    white-space: nowrap;
}

.empty-state {
    text-align: center;
    color: var(--muted);
    padding: 20px;
}

@media (max-width: 900px) {
    .navbar {
        padding: 15px 20px;
        align-items: flex-start;
        flex-direction: column;
    }

    .navbar__left {
        gap: 16px;
    }

    .dashboard-grid {
        grid-template-columns: 1fr;
    }

    .header-section--split,
    .driver-header,
    .constructor-header {
        align-items: flex-start;
    }
}

@media (max-width: 640px) {
    .container,
    .page-shell {
        padding-left: 12px;
        padding-right: 12px;
    }

    th,
    td {
        padding-left: 12px;
        padding-right: 12px;
    }

    .pagination {
        flex-direction: column;
        align-items: stretch;
    }

    .page-btn,
    .search-btn,
    .btn-primary,
    .action-btn,
    .auth-submit {
        width: 100%;
    }
}