:root {
    color-scheme: light dark;
    --border: #e2e5ea;
    --muted: #6b7280;
    --bg: #f4f5f7;
    --surface: #ffffff;
    --dark: #0c0d0e;
    --dark-alt: #17181a;
    --link: #1a7c8c;
    --cyan: #31bad3;
    --gold: #ecaa43;
    --btn-text: #0c0d0e;
    --danger: #dc2626;
    --danger-bg: #fef2f2;
    --success-bg: #f0fdf4;
    --success: #15803d;
    --shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.06);
    --shadow-md: 0 4px 12px rgba(16, 24, 40, 0.08);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: 'Instrument Sans', system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    background: var(--bg);
    color: #1f2937;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--link);
}

/* Header */

.admin-nav {
    position: sticky;
    top: 0;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.85rem 1.75rem;
    background: var(--dark);
    border-bottom: 2px solid var(--gold);
    box-shadow: var(--shadow-sm);
}

.admin-nav .brand {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-weight: 600;
    color: #fff;
}

.admin-nav .brand-logo {
    height: 28px;
    width: auto;
    display: block;
}

.admin-nav .brand-text {
    font-size: 0.95rem;
    color: #9aa1ac;
}

.admin-nav nav {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.admin-nav nav a {
    text-decoration: none;
    color: #d1d5db;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.15s ease;
}

.admin-nav nav a:hover {
    color: var(--gold);
}

.admin-nav nav .btn-link {
    color: #d1d5db;
    font-size: 0.9rem;
    font-weight: 500;
}

.admin-nav nav .btn-link:hover {
    color: var(--gold);
}

/* Layout */

.admin-container {
    max-width: 1000px;
    margin: 2.5rem auto;
    padding: 0 1.75rem;
}

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.75rem;
    box-shadow: var(--shadow-sm);
}

.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.25rem;
}

.page-header h1 {
    font-size: 1.375rem;
    margin: 0;
}

h1 {
    font-size: 1.375rem;
}

/* Table */

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

th, td {
    text-align: left;
    padding: 0.7rem 0.85rem;
    border-bottom: 1px solid var(--border);
    font-size: 0.925rem;
}

tbody tr:hover {
    background: color-mix(in srgb, var(--cyan) 6%, transparent);
}

th {
    color: var(--muted);
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

td .btn-link + .btn-link,
td a + a,
td a + .btn-link,
td a + form {
    margin-left: 0.9rem;
}

/* Buttons */

.btn {
    display: inline-block;
    padding: 0.55rem 1.1rem;
    border-radius: 999px;
    background: var(--cyan);
    color: var(--btn-text);
    text-decoration: none;
    border: none;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    box-shadow: var(--shadow-sm);
    transition: background-color 0.15s ease, transform 0.05s ease;
}

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

.btn:active {
    transform: translateY(1px);
}

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

.btn-danger:hover {
    background: #b91c1c;
}

.btn-link {
    background: none;
    border: none;
    margin: 0;
    color: var(--link);
    padding: 0;
    text-decoration: underline;
    font: inherit;
    cursor: pointer;
    appearance: none;
}

/* Forms */

.form-group {
    margin-bottom: 1.1rem;
}

label {
    display: block;
    margin-bottom: 0.35rem;
    font-size: 0.875rem;
    font-weight: 500;
}

input[type="text"],
input[type="email"],
input[type="password"] {
    width: 100%;
    padding: 0.6rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 0.925rem;
    background: var(--surface);
    color: inherit;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus {
    outline: none;
    border-color: var(--cyan);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--cyan) 22%, transparent);
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.checkbox-group input {
    width: auto;
}

.help-text {
    color: var(--muted);
    font-size: 0.8rem;
    margin-top: 0.3rem;
}

.badge {
    display: inline-block;
    padding: 0.2rem 0.55rem;
    border-radius: 999px;
    font-size: 0.75rem;
    background: #e3f7fb;
    color: #0f5b68;
    margin-right: 0.3rem;
    font-weight: 500;
}

code {
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    font-size: 0.85em;
    background: color-mix(in srgb, var(--muted) 12%, transparent);
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
}

.alert {
    padding: 0.85rem 1.1rem;
    border-radius: 8px;
    margin-bottom: 1.1rem;
    font-size: 0.9rem;
}

.alert-success {
    background: var(--success-bg);
    color: var(--success);
}

.alert-danger {
    background: var(--danger-bg);
    color: var(--danger);
}

.alert ul {
    margin: 0;
    padding-left: 1.2rem;
}

/* Login */

.login-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg);
    padding: 1.5rem;
}

.login-card {
    width: 100%;
    max-width: 380px;
    box-shadow: var(--shadow-md);
    border-radius: 12px;
    overflow: hidden;
    padding: 0;
}

.login-brand {
    background: var(--dark);
    padding: 2rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-logo {
    height: 40px;
    width: auto;
}

.login-form {
    padding: 1.75rem;
}

.login-card h1 {
    font-size: 1.2rem;
    margin: 0 0 1.4rem;
    text-align: center;
}

.login-card .btn {
    width: 100%;
    padding: 0.65rem 1.1rem;
    background: linear-gradient(90deg, var(--cyan), var(--gold));
    color: var(--btn-text);
}

.login-card .btn:hover {
    filter: brightness(1.05);
}

@media (prefers-color-scheme: dark) {
    :root {
        --border: #2b2f38;
        --bg: #101216;
        --surface: #191c22;
        --link: #6fd6e8;
    }

    body {
        color: #e5e7eb;
    }

    input[type="text"],
    input[type="email"],
    input[type="password"] {
        background: #14161a;
        color: #e5e7eb;
    }

    .badge {
        background: #123540;
        color: #a6e9f5;
    }

    code {
        color: #e5e7eb;
    }
}