:root {
    --color-bg: #f4f6f8;
    --color-surface: #ffffff;
    --color-text: #1f2933;
    --color-muted: #64748b;
    --color-primary: #1d4ed8;
    --color-primary-dark: #1e3a8a;
    --color-success: #15803d;
    --color-danger: #b91c1c;
    --color-warning: #b45309;
    --color-border: #e2e8f0;
    --radius: 10px;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
}

.container {
    max-width: 480px;
    margin: 0 auto;
    padding: 24px 16px 64px;
}

.container-wide {
    max-width: 900px;
    margin: 0 auto;
    padding: 24px 16px 64px;
}

.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 16px;
}

h1 {
    font-size: 1.4rem;
    margin: 0 0 4px;
}

h2 {
    font-size: 1.1rem;
    margin: 0 0 16px;
}

p.subtitle {
    color: var(--color-muted);
    margin: 0 0 20px;
    font-size: 0.95rem;
}

label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    margin: 14px 0 6px;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="tel"],
input[type="datetime-local"],
select,
textarea {
    width: 100%;
    padding: 12px;
    font-size: 1rem;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    background: #fff;
}

textarea {
    resize: vertical;
    min-height: 80px;
}

button,
.btn {
    display: inline-block;
    text-align: center;
    width: 100%;
    padding: 14px;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: 8px;
    background: var(--color-primary);
    color: #fff;
    cursor: pointer;
    margin-top: 18px;
    text-decoration: none;
}

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

.btn-lg {
    padding: 20px;
    font-size: 1.15rem;
}

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

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

.btn-secondary {
    background: #64748b;
}

.alert {
    padding: 12px 14px;
    border-radius: 8px;
    margin-bottom: 16px;
    font-size: 0.9rem;
}

.alert-error {
    background: #fee2e2;
    color: var(--color-danger);
}

.alert-success {
    background: #dcfce7;
    color: var(--color-success);
}

.alert-info {
    background: #dbeafe;
    color: var(--color-primary-dark);
}

table {
    width: 100%;
    border-collapse: collapse;
    background: #fff;
}

th, td {
    text-align: left;
    padding: 10px 12px;
    border-bottom: 1px solid var(--color-border);
    font-size: 0.9rem;
}

th {
    color: var(--color-muted);
    font-weight: 600;
}

.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-pendiente { background: #fef3c7; color: var(--color-warning); }
.badge-aprobado { background: #dcfce7; color: var(--color-success); }
.badge-rechazado { background: #fee2e2; color: var(--color-danger); }
.badge-expirado { background: #e2e8f0; color: var(--color-muted); }

nav.topnav {
    background: var(--color-primary-dark);
    padding: 12px 16px;
    display: flex;
    gap: 18px;
    flex-wrap: wrap;
    align-items: center;
}

nav.topnav a {
    color: #fff;
    text-decoration: none;
    font-size: 0.9rem;
    opacity: 0.9;
}

nav.topnav a:hover {
    opacity: 1;
    text-decoration: underline;
}

nav.topnav .spacer {
    flex: 1;
}

.access-card {
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 18px;
    margin-bottom: 14px;
}

.access-card .meta {
    color: var(--color-muted);
    font-size: 0.85rem;
    margin-bottom: 12px;
}

.access-card h3 {
    margin: 0 0 6px;
    font-size: 1.05rem;
}

.helper-text {
    font-size: 0.8rem;
    color: var(--color-muted);
    margin-top: 6px;
}