/* ==========================================
   ESTILOS GLOBALES Y RESET
   ========================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #1a1a1a, #2d2d2d);
    color: #fff;
    min-height: 100vh;
    line-height: 1.6;
}

/* ==========================================
   CONTENEDOR PRINCIPAL
   ========================================== */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* ==========================================
   HEADER Y NAVEGACIÃ"N
   ========================================== */
header {
    background: linear-gradient(135deg, #ff6b35, #f7931e);
    padding: 20px 0;
    margin-bottom: 30px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.3);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 28px;
    font-weight: bold;
    color: #fff;
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-menu {
    display: flex;
    gap: 15px;
}

.nav-menu a {
    color: #fff;
    text-decoration: none;
    padding: 10px 20px;
    border-radius: 5px;
    transition: all 0.3s;
    cursor: pointer;
    font-weight: 500;
}

.nav-menu a:hover,
.nav-menu a.active {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.menu-toggle {
    background: none;
    border: none;
    color: #fff;
    font-size: 28px;
    cursor: pointer;
    display: none;
}

/* ==========================================
   SECCIONES
   ========================================== */
.section {
    display: none;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 15px;
    padding: 30px;
    margin-bottom: 20px;
    backdrop-filter: blur(10px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    animation: fadeIn 0.3s ease-in;
}

.section.active {
    display: block;
}

.section h2 {
    color: #ff6b35;
    margin-bottom: 25px;
    font-size: 28px;
    border-bottom: 3px solid #ff6b35;
    padding-bottom: 10px;
}

.section h3 {
    color: #f7931e;
    margin: 20px 0;
    font-size: 22px;
}

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

/* ==========================================
   TARJETAS DE MENÚ
   ========================================== */
.menu-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.menu-card {
    background: linear-gradient(135deg, #ff6b35, #f7931e);
    padding: 30px;
    border-radius: 15px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

.menu-card:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 12px 35px rgba(255, 107, 53, 0.4);
}

.menu-card h3 {
    margin-bottom: 15px;
    font-size: 20px;
    color: #fff;
    border: none;
}

.menu-card p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 14px;
}

/* ==========================================
   FORMULARIOS - INPUTS Y TEXTAREAS MEJORADOS
   ========================================== */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #ff6b35;
    font-weight: 600;
    font-size: 14px;
}

/* INPUTS Y TEXTAREAS */
.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.08);
    color: #ffffff;
    font-size: 15px;
    transition: all 0.3s;
}

/* INPUTS DENTRO DE MODALES (background blanco) */
.modal-content .form-group input,
.modal-content .form-group textarea {
    background: #ffffff;
    color: #333333;
    border-color: #e0e0e0;
}

.modal-content .form-group input::placeholder,
.modal-content .form-group textarea::placeholder {
    color: #999;
}

.modal-content .form-group input:focus,
.modal-content .form-group textarea:focus {
    border-color: #ff6b35;
    background: #ffffff;
    box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.1);
}

/* INPUTS EN SECCIONES NORMALES (background oscuro) */
.section .form-group input,
.section .form-group textarea {
    background: rgba(255, 255, 255, 0.08);
    color: #ffffff;
    border-color: rgba(255, 255, 255, 0.1);
}

.section .form-group input::placeholder,
.section .form-group textarea::placeholder {
    color: rgba(255, 255, 255, 0.6);
}

.section .form-group input:focus,
.section .form-group textarea:focus {
    outline: none;
    border-color: #ff6b35;
    background: rgba(255, 255, 255, 0.12);
    box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.1);
}

/* SELECT - DROPDOWN */
.form-group select {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    background: #1a1a1a;
    color: #ffffff;
    font-size: 15px;
    transition: all 0.3s;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 10px center;
    background-size: 20px;
    padding-right: 35px;
}

.form-group select option {
    background: #1a1a1a;
    color: #ffffff;
    padding: 10px;
    margin: 5px 0;
}

.form-group select option:checked {
    background: #ff6b35;
    color: #ffffff;
}

/* SELECT EN MODALES */
.modal-content .form-group select {
    background-color: #ffffff;
    color: #333333;
    border-color: #e0e0e0;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23333' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
}

.modal-content .form-group select option {
    background: #ffffff;
    color: #333333;
}

.modal-content .form-group select option:checked {
    background: #ff6b35;
    color: #ffffff;
}

.form-group select:focus {
    outline: none;
    border-color: #ff6b35;
    background-color: #1a1a1a;
    box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.1);
}

.modal-content .form-group select:focus {
    border-color: #ff6b35;
    background-color: #ffffff;
    box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.1);
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin-bottom: 20px;
}

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

/* ==========================================
   BOTONES
   ========================================== */
.btn {
    background: linear-gradient(135deg, #ff6b35, #f7931e);
    color: #fff;
    border: none;
    padding: 12px 25px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 15px;
    font-weight: 600;
    transition: all 0.3s;
    margin-right: 10px;
    margin-bottom: 10px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(255, 107, 53, 0.4);
}

.btn:active {
    transform: translateY(0);
}

.btn-secondary {
    background: linear-gradient(135deg, #555, #777);
}

.btn-secondary:hover {
    box-shadow: 0 5px 15px rgba(85, 85, 85, 0.4);
}

.btn-danger {
    background: linear-gradient(135deg, #dc3545, #c82333);
}

.btn-danger:hover {
    box-shadow: 0 5px 15px rgba(220, 53, 69, 0.4);
}

.btn-success {
    background: linear-gradient(135deg, #28a745, #218838);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ==========================================
   TABLAS
   ========================================== */
.table-container {
    overflow-x: auto;
    margin-top: 20px;
}

.table {
    width: 100%;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 10px;
    overflow: hidden;
    border-collapse: collapse;
}

.table th,
.table td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    color: #ffffff;
}

.table th {
    background: rgba(255, 107, 53, 0.3);
    color: #ff6b35;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 13px;
    letter-spacing: 0.5px;
}

.table tbody tr {
    transition: all 0.3s;
}

.table tbody tr:hover {
    background: rgba(255, 255, 255, 0.05);
}

.table tbody tr:last-child td {
    border-bottom: none;
}

/* Estados */
.status-active {
    color: #28a745;
    font-weight: 600;
}

.status-inactive {
    color: #dc3545;
    font-weight: 600;
}

.status-pending {
    color: #ffc107;
    font-weight: 600;
}

/* ==========================================
   CALENDARIO
   ========================================== */
.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 10px;
    margin-top: 20px;
}

.calendar-day {
    background: rgba(255, 255, 255, 0.08);
    padding: 15px;
    border-radius: 8px;
    min-height: 150px;
    border: 2px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s;
    color: #ffffff;
}

.calendar-day:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 107, 53, 0.5);
}

.calendar-header {
    background: rgba(255, 107, 53, 0.3);
    font-weight: 600;
    color: #ff6b35;
    text-align: center;
    min-height: auto;
    padding: 10px;
    text-transform: uppercase;
    font-size: 13px;
    letter-spacing: 1px;
}

.session-item {
    background: rgba(255, 107, 53, 0.2);
    margin: 8px 0;
    padding: 8px;
    border-radius: 6px;
    font-size: 12px;
    border-left: 3px solid #ff6b35;
    transition: all 0.3s;
    color: #ffffff;
}

.session-item:hover {
    background: rgba(255, 107, 53, 0.3);
    transform: translateX(3px);
}

/* ==========================================
   ESTADÃSTICAS
   ========================================== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.stat-card {
    background: rgba(255, 255, 255, 0.08);
    padding: 25px;
    border-radius: 10px;
    text-align: center;
    border: 2px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s;
}

.stat-card:hover {
    transform: translateY(-5px);
    border-color: rgba(255, 107, 53, 0.5);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
}

.stat-number {
    font-size: 36px;
    font-weight: bold;
    color: #ff6b35;
    margin-bottom: 10px;
}

.stat-label {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* ==========================================
   ALERTAS Y MENSAJES
   ========================================== */
.alert {
    padding: 15px 20px;
    margin: 15px 0;
    border-radius: 8px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 10px;
    animation: slideDown 0.3s ease-out;
}

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

.alert-success {
    background: rgba(40, 167, 69, 0.2);
    color: #28a745;
    border: 2px solid #28a745;
}

.alert-error {
    background: rgba(220, 53, 69, 0.2);
    color: #dc3545;
    border: 2px solid #dc3545;
}

.alert-warning {
    background: rgba(255, 193, 7, 0.2);
    color: #ffc107;
    border: 2px solid #ffc107;
}

.alert-info {
    background: rgba(23, 162, 184, 0.2);
    color: #17a2b8;
    border: 2px solid #17a2b8;
}

/* ==========================================
   LOADING Y ESTADOS
   ========================================== */
.loading {
    text-align: center;
    color: #ff6b35;
    padding: 30px;
    font-size: 16px;
}

.loading::after {
    content: '...';
    animation: dots 1.5s steps(4, end) infinite;
}

@keyframes dots {
    0%, 20% { content: '.'; }
    40% { content: '..'; }
    60%, 100% { content: '...'; }
}

.empty-state {
    text-align: center;
    padding: 40px;
    color: rgba(255, 255, 255, 0.5);
    font-style: italic;
}

/* ==========================================
   SESIONES DE ENTRENAMIENTO
   ========================================== */
.session-form {
    background: rgba(255, 255, 255, 0.03);
    padding: 20px;
    border-radius: 10px;
    margin-bottom: 15px;
    border: 2px solid rgba(255, 255, 255, 0.1);
}

.session-form hr {
    margin: 20px 0;
    border: none;
    border-top: 2px solid rgba(255, 255, 255, 0.1);
}

/* ==========================================
   RESPONSIVE
   ========================================== */
@media (max-width: 1024px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 70px;
        right: 20px;
        background: rgba(0, 0, 0, 0.95);
        padding: 20px;
        border-radius: 10px;
        flex-direction: column;
        min-width: 200px;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    }

    .nav-menu.active {
        display: flex;
    }

    .menu-toggle {
        display: block;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 15px;
    }

    .section {
        padding: 20px;
    }

    .section h2 {
        font-size: 24px;
    }

    .logo {
        font-size: 22px;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

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

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

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

    .table th,
    .table td {
        padding: 10px;
        font-size: 13px;
    }

    .btn {
        padding: 10px 20px;
        font-size: 14px;
    }
}

@media (max-width: 480px) {
    .header-content {
        padding: 0 15px;
    }

    .logo {
        font-size: 18px;
    }

    .section h2 {
        font-size: 20px;
    }

    .menu-card {
        padding: 20px;
    }

    .stat-number {
        font-size: 28px;
    }
}

/* ==========================================
   UTILIDADES
   ========================================== */
.text-center {
    text-align: center;
}

.mt-20 {
    margin-top: 20px;
}

.mb-20 {
    margin-bottom: 20px;
}

.hidden {
    display: none;
}

.flex {
    display: flex;
}

.flex-center {
    display: flex;
    justify-content: center;
    align-items: center;
}

.gap-10 {
    gap: 10px;
}

/* ==========================================
   SCROLLBAR PERSONALIZADO
   ========================================== */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 107, 53, 0.5);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 107, 53, 0.7);
}

/* ==========================================
   MODAL
   ========================================== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 20px;
}

.modal-content {
    background: white;
    border-radius: 12px;
    max-width: 900px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    border-bottom: 2px solid #eee;
    position: sticky;
    top: 0;
    background: white;
}

.modal-header h2 {
    margin: 0;
    color: #333;
    font-size: 24px;
}

.close-btn {
    background: none;
    border: none;
    font-size: 28px;
    cursor: pointer;
    color: #999;
    padding: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.3s;
}

.close-btn:hover {
    color: #333;
}

.modal-body {
    padding: 20px;
    max-height: calc(90vh - 140px);
    overflow-y: auto;
}

.plan-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin-bottom: 30px;
    padding: 15px;
    background: #f9f9f9;
    border-radius: 8px;
}

.plan-info p {
    margin: 0;
    font-size: 14px;
    color: #555;
}

.plan-info strong {
    color: #333;
}

.sessions-list h3 {
    color: #ff6b35;
    margin-top: 0;
    margin-bottom: 15px;
    font-size: 18px;
}

.day-sessions {
    margin-bottom: 20px;
    padding: 15px;
    border-left: 4px solid #ff6b35;
    background: #f9f9f9;
    border-radius: 5px;
}

.day-sessions h4 {
    margin: 0 0 15px 0;
    color: #333;
    font-size: 16px;
}

.session-detail {
    margin-bottom: 15px;
    padding: 12px;
    background: white;
    border-radius: 5px;
    border: 1px solid #ddd;
}

.session-detail > div:first-child {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 10px;
    margin-bottom: 10px;
    padding-bottom: 10px;
    border-bottom: 1px solid #eee;
}

.session-detail strong {
    color: #333;
}

.session-detail ul {
    margin: 10px 0 0 20px;
    padding: 0;
}

.session-detail li {
    margin: 8px 0;
    color: #555;
    font-size: 14px;
}

.session-detail li strong {
    color: #ff6b35;
}

.modal-footer {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
    padding: 20px;
    border-top: 2px solid #eee;
    position: sticky;
    bottom: 0;
    background: white;
}

.modal-footer .btn {
    margin: 0;
}

/* ==========================================
   IMPRESIÃ"N
   ========================================== */
@media print {
    body {
        background: white;
        color: black;
    }

    .no-print,
    header,
    .btn,
    .menu-toggle,
    .nav-menu {
        display: none !important;
    }

    .section {
        background: white;
        box-shadow: none;
        page-break-inside: avoid;
    }

    .table {
        background: white;
    }

    .table th {
        background: #f0f0f0;
        color: #333;
    }
}

/* ==========================================
   BOTONES PEQUEÃOS Y PELIGROSOS
   ========================================== */
.btn-small {
    padding: 6px 12px !important;
    font-size: 12px !important;
}

.btn-danger {
    background: #dc3545 !important;
    border: none;
    color: white;
}

.btn-danger:hover {
    background: #c82333 !important;
}
.btn-info {
    background-color: #17a2b8;
    color: white;
    border: none;
    padding: 8px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s;
}

.btn-info:hover {
    background-color: #138496;
    transform: translateY(-2px);
    box-shadow: 0 2px 8px rgba(23, 162, 184, 0.3);
}

.modal-footer {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
    padding: 15px;
    border-top: 1px solid #ddd;
    background: #f9f9f9;
}