:root {
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --danger: #dc2626;
    --success: #16a34a;
    --shadow-lg: 0 24px 48px -24px rgba(15, 23, 42, 0.28);
    --bg-dark: #f4f7fb;
    --surface-dark: #ffffff;
    --surface-hover: #eef3fb;
    --surface-soft: #f8fafc;
    --input-bg: #ffffff;
    --text-light: #0f172a;
    --text-dim: #64748b;
    --border: #d9e2ef;
    --border-strong: #c3d2e5;
    --navbar-bg: rgba(255, 255, 255, 0.88);
    --modal-overlay: rgba(148, 163, 184, 0.38);
    --table-head: #f8fafc;
    --auth-bg: radial-gradient(circle at top, #dbeafe 0%, #f4f7fb 58%, #eef2ff 100%);
}

body[data-theme="dark"] {
    --bg-dark: #0b1220;
    --surface-dark: #111b2e;
    --surface-hover: #1d2a41;
    --surface-soft: #162238;
    --input-bg: #09111f;
    --text-light: #f8fafc;
    --text-dim: #94a3b8;
    --border: #243247;
    --border-strong: #334155;
    --navbar-bg: rgba(17, 27, 46, 0.9);
    --modal-overlay: rgba(2, 6, 23, 0.72);
    --table-head: rgba(255, 255, 255, 0.03);
    --auth-bg: radial-gradient(circle at top, #1e1b4b 0%, #0f172a 58%, #020617 100%);
}

body {
    margin: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-light);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    transition: background-color 0.2s ease, color 0.2s ease;
}

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

.navbar {
    background: var(--navbar-bg);
    border-bottom: 1px solid var(--border);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    backdrop-filter: blur(14px);
    position: sticky;
    top: 0;
    z-index: 10;
}

.navbar-brand {
    font-weight: 800;
    font-size: 1.25rem;
    color: var(--text-light);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    letter-spacing: -0.02em;
}

.navbar-brand span {
    color: var(--primary);
}

.nav-link {
    color: var(--text-dim);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.2s;
    font-size: 0.95rem;
}

.nav-link:hover {
    color: var(--text-light);
}

.theme-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.65rem 0.9rem;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: var(--surface-dark);
    color: var(--text-light);
    cursor: pointer;
    transition: background-color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.theme-toggle:hover {
    background: var(--surface-hover);
    border-color: var(--border-strong);
    transform: translateY(-1px);
}

.theme-toggle-label {
    font-size: 0.82rem;
    font-weight: 700;
}

body[data-theme="light"] .theme-icon-dark,
body[data-theme="dark"] .theme-icon-light {
    display: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    width: 100%;
    box-sizing: border-box;
}

.auth-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: var(--auth-bg);
}

.auth-card {
    background: var(--surface-dark);
    padding: 2.5rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 400px;
    border: 1px solid var(--border);
}

.auth-title {
    font-size: 1.875rem;
    font-weight: 800;
    text-align: center;
    margin-bottom: 2rem;
    color: var(--text-light);
    letter-spacing: -0.03em;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-dim);
}

.form-input {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    color: var(--text-light);
    font-size: 0.95rem;
    outline: none;
    transition: all 0.2s;
    box-sizing: border-box;
}

.form-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.14);
}

.btn {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    padding: 0.75rem 1.5rem;
    border-radius: 0.75rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s;
    border: none;
    font-size: 0.95rem;
    text-decoration: none;
}

.btn-primary {
    background: var(--primary);
    color: white;
    box-shadow: 0 8px 18px -10px rgba(37, 99, 235, 0.5);
    width: 100%;
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn-danger {
    background: rgba(220, 38, 38, 0.1);
    color: var(--danger);
}

.btn-danger:hover {
    background: rgba(220, 38, 38, 0.16);
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    gap: 1rem;
}

.page-title {
    font-size: 2rem;
    font-weight: 800;
    margin: 0;
    letter-spacing: -0.03em;
}

.card {
    background: var(--surface-dark);
    border: 1px solid var(--border);
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

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

.table th {
    text-align: left;
    padding: 1rem 1.5rem;
    background: var(--table-head);
    color: var(--text-dim);
    font-weight: 700;
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.table td {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border);
    color: var(--text-light);
}

.table tr:hover {
    background: var(--surface-hover);
}

.badge {
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 700;
}

.badge-success {
    background: rgba(22, 163, 74, 0.12);
    color: var(--success);
}

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

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--modal-overlay);
    backdrop-filter: blur(6px);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 50;
}

.modal-overlay.active {
    display: flex;
}

.modal {
    background: var(--surface-dark);
    border: 1px solid var(--border);
    border-radius: 1rem;
    padding: 2rem;
    width: 100%;
    max-width: 500px;
    position: relative;
    animation: modalSlide 0.3s ease-out;
    box-shadow: var(--shadow-lg);
}

@keyframes modalSlide {
    from {
        transform: translateY(20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.close-btn {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    color: var(--text-dim);
    cursor: pointer;
    font-size: 1.5rem;
}

.close-btn:hover {
    color: var(--text-light);
}

@media (max-width: 980px) {
    .navbar {
        padding: 1rem 1.25rem;
        align-items: flex-start;
        gap: 1rem;
        flex-direction: column;
    }

    .container {
        padding: 1.25rem;
    }

    .header {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 768px) {
    .table {
        display: block;
        overflow-x: auto;
        white-space: nowrap;
    }

    .theme-toggle-label {
        display: none;
    }
}