/* styles.css */
*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    margin: 0;
    background: #f5f5f5;
    color: #222;
}

header {
    background: linear-gradient(135deg, #222, #444);
    color: #fff;
    padding: 1.5rem 1rem;
    text-align: center;
}

header h1 {
    margin: 0;
    font-size: 1.6rem;
}

header .subtitle {
    margin: 0.25rem 0 0;
    font-size: 0.9rem;
    opacity: 0.8;
}

main {
    padding: 1rem;
    max-width: 1100px;
    margin: 0 auto;
}

/* Tabs */
.tabs {
    display: flex;
    flex-wrap: wrap;
    background: #fff;
    border-bottom: 1px solid #ddd;
}

.tab-button {
    flex: 1 1 0;
    padding: 0.5rem;
    border: none;
    background: #f5f5f5;
    cursor: pointer;
    font-size: 0.9rem;
    border-right: 1px solid #ddd;
    color: #000;    
}

.tab-button:last-child {
    border-right: none;
}

.tab-button.active {
    background: #fff;
    border-bottom: 2px solid #0077cc;
    font-weight: 600;
}

.tab-panel {
    display: none;
    background: #fff;
    padding: 1rem;
    margin-bottom: 1rem;
    border-radius: 4px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.tab-panel.active {
    display: block;
}

h2 {
    margin-top: 0;
}

/* Forms */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 0.75rem 1rem;
    margin-bottom: 1rem;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-size: 0.85rem;
    margin-bottom: 0.25rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 0.4rem;
    border-radius: 3px;
    border: 1px solid #ccc;
    font-size: 0.9rem;
}

.form-group small {
    font-size: 0.75rem;
    color: #555;
}

.full-width {
    grid-column: 1/-1;
}

button {
    padding: 0.45rem 0.9rem;
    font-size: 0.9rem;
    border-radius: 3px;
    border: none;
    background: #0077cc;
    color: #fff;
    cursor: pointer;
}

button:hover {
    background: #005fa3;
}

button:disabled {
    opacity: 0.6;
    cursor: default;
    background: #999;
}

.inline-form {
    display: flex;
    gap: 0.5rem;
}

/* Lists & pills */
.pill-list {
    list-style: none;
    padding: 0;
    margin: 0.5rem 0 0;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.pill-list li {
    background: #eee;
    padding: 0.25rem 0.6rem;
    border-radius: 999px;
    font-size: 0.8rem;
}

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
    margin-bottom: 1rem;
}

th,
td {
    border: 1px solid #ddd;
    padding: 0.35rem 0.5rem;
    text-align: left;
    background-color: #dbdbdb;
}

th {
    background: #f0f0f0;
}

tr:nth-child(even) td {
    background: #fafafa;
}

/* Calendar & reservations */
.calendar-controls {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
    flex-wrap: wrap;
}

.calendar-summary {
    margin-bottom: 1rem;
}

.reservation-panel {
    display: grid;
    grid-template-columns: minmax(260px, 1.2fr) minmax(200px, 1fr);
    gap: 1rem;
}

.reservation-details {
    background: #fafafa;
    border-radius: 4px;
    padding: 0.75rem;
    font-size: 0.85rem;
}

.reservation-details h4 {
    margin-top: 0;
}

/* Reports */
.report-section {
    margin-top: 1rem;
}

.report-section h3 {
    margin-bottom: 0.4rem;
}

/* Log & datos */
.log-controls {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-bottom: 0.75rem;
}

.btn-file {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

.log-output {
    max-height: 280px;
    overflow-y: auto;
    background: #111;
    color: #eee;
    padding: 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
}

/* Footer */
footer {
    text-align: center;
    padding: 0.5rem;
    font-size: 0.75rem;
    color: #666;
}

.highlight-session {
    background-color: rgba(56, 189, 248, 0.2);
}

.session-students {
    margin: 0;
    padding-left: 1.2rem;
    font-size: 0.85rem;
}

.no-bookings {
    font-size: 0.8rem;
    color: #9ca3af;
}

.badge {
    display: inline-block;
    padding: 0.1rem 0.4rem;
    border-radius: 9999px;
    font-size: 0.7rem;
}

.badge-config {
    background: #1e3a8a;
    color: #bfdbfe;
}

.badge-config-override {
    background: #92400e;
    color: #fed7aa;
}

.badge-custom {
    background: #14532d;
    color: #bbf7d0;
}

.badge-walkin {
    display: inline-block;
    margin-left: .25rem;
    padding: 0 .25rem;
    border-radius: .25rem;
    font-size: .7rem;
    background: #334155;
    color: #e5e7eb;
}

.session-readonly {
    opacity: 0.5;
    cursor: not-allowed;
}

.session-readonly:hover {
    background: rgba(148, 163, 184, 0.15);
}

/* Badges de nivel de fidelización */
.tier-badge {
    display: inline-block;
    padding: 0.15rem 0.5rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
    color: #0b1020;
}

.tier-gold {
    background: #facc15;
    /* amarillo oro */
}

.tier-silver {
    background: #e5e7eb;
    /* gris claro */
}

.tier-bronze {
    background: #f97316;
    /* naranja/bronce */
}

.tier-risk {
    background: #fecaca;
    /* rojo suave */
    color: #7f1d1d;
}

/* Caja resumen fidelización */
.fidelity-summary {
    margin-bottom: 1rem;
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    background: #ffffff;
    border: 1px solid #1f2937;
    font-size: 0.85rem;
}

.fidelity-summary h3 {
    margin-top: 0;
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

.fidelity-summary ul {
    margin: 0.25rem 0;
    padding-left: 1.2rem;
}

.fidelity-summary li {
    margin: 0.15rem 0;
}