/* Reset y estilos base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-blanco: #FFFFFF;
    --color-verde-principal: #28a745;
    --color-verde-oscuro: #1e7e34;
    --color-naranja: #fd7e14;
    --color-naranja-oscuro: #dc6502;
    --color-negro: #000000;
    --color-gris: #333333;
    --color-gris-claro: #F5F5F5;
    --color-gris-medio: #CCCCCC;
    --color-azul: #007bff;
    --color-rojo: #dc3545;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f0f0f0;
    color: var(--color-negro);
}

/* Barra superior */
.profesores-topbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: var(--color-verde-principal);
    color: var(--color-blanco);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
    z-index: 1000;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.topbar-left h1 {
    font-size: 20px;
    color: var(--color-blanco);
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

.server-datetime {
    font-size: 13px !important;
    font-weight: normal !important;
    color: rgba(255, 255, 255, 0.8) !important;
    font-family: 'Courier New', monospace;
    background: rgba(255, 255, 255, 0.1);
    padding: 4px 8px;
    border-radius: 4px;
    white-space: nowrap;
}

.topbar-right {
    display: flex;
    gap: 15px;
    align-items: center;
}

.topbar-right .profesor-nombre {
    color: var(--color-blanco);
    font-weight: bold;
}

.btn-ver-sitio,
.btn-logout {
    padding: 8px 15px;
    background: var(--color-naranja);
    color: var(--color-blanco);
    text-decoration: none;
    border-radius: 5px;
    font-size: 14px;
    font-weight: bold;
    transition: background 0.3s;
    border: none;
    cursor: pointer;
}

.btn-ver-sitio:hover,
.btn-logout:hover {
    background: var(--color-naranja-oscuro);
}

/* Menú de navegación */
.profesores-nav {
    position: fixed;
    top: 60px;
    left: 0;
    width: 250px;
    height: calc(100vh - 60px);
    background: var(--color-blanco);
    border-right: 1px solid var(--color-gris-medio);
    overflow-y: auto;
    z-index: 999;
}

.nav-container {
    padding: 10px 0;
}

.nav-menu {
    list-style: none;
}

.nav-item {
    margin-bottom: 5px;
}

.nav-link {
    display: flex;
    align-items: center;
    padding: 12px 20px;
    color: var(--color-negro);
    text-decoration: none;
    transition: all 0.3s;
    border-left: 3px solid transparent;
}

.nav-link:hover {
    background: var(--color-gris-claro);
    border-left-color: var(--color-verde-principal);
}

.nav-item.active > .nav-link {
    background: var(--color-verde-principal);
    color: var(--color-blanco);
    border-left-color: var(--color-verde-oscuro);
    font-weight: bold;
}

.nav-icon {
    font-size: 20px;
    margin-right: 10px;
    width: 25px;
    text-align: center;
}

.nav-text {
    flex: 1;
}

/* Contenedor principal */
.profesores-container {
    margin-left: 250px;
    margin-top: 60px;
    padding: 20px;
    min-height: calc(100vh - 60px);
}

.profesores-content {
    max-width: 1400px;
    margin: 0 auto;
}

/* Cards */
.card {
    background: var(--color-blanco);
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin-bottom: 20px;
}

.card-header {
    padding: 15px 20px;
    background: var(--color-verde-principal);
    color: var(--color-blanco);
    font-weight: bold;
    border-radius: 8px 8px 0 0;
}

.card-body {
    padding: 20px;
}

/* Formularios */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
    color: var(--color-gris);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--color-gris-medio);
    border-radius: 5px;
    font-size: 14px;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-verde-principal);
    box-shadow: 0 0 0 2px rgba(40, 167, 69, 0.25);
}

/* Botones */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    font-size: 14px;
    font-weight: bold;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    transition: all 0.3s;
}

.btn-primary {
    background: var(--color-verde-principal);
    color: var(--color-blanco);
}

.btn-primary:hover {
    background: var(--color-verde-oscuro);
}

.btn-secondary {
    background: var(--color-gris-medio);
    color: var(--color-negro);
}

.btn-secondary:hover {
    background: #b0b0b0;
}

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

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

.btn-warning {
    background: var(--color-naranja);
    color: var(--color-blanco);
}

.btn-warning:hover {
    background: var(--color-naranja-oscuro);
}

.btn-block {
    width: 100%;
}

/* Alertas */
.alert {
    padding: 15px;
    border-radius: 5px;
    margin-bottom: 20px;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

/* Tablas */
.table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

.table th,
.table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid var(--color-gris-medio);
}

.table th {
    background: var(--color-gris-claro);
    font-weight: bold;
}

.table tr:hover {
    background: var(--color-gris-claro);
}

/* Página de login */
.login-page {
    background: linear-gradient(135deg, var(--color-verde-principal) 0%, var(--color-verde-oscuro) 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: 20px;
}

.login-box {
    background: var(--color-blanco);
    border-radius: 10px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

.login-header {
    text-align: center;
    margin-bottom: 30px;
}

.login-header h1 {
    color: var(--color-verde-principal);
    margin-bottom: 10px;
}

.login-header p {
    color: var(--color-gris);
    font-size: 14px;
}

.login-form {
    margin-top: 20px;
}

.login-footer {
    text-align: center;
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--color-gris-medio);
}

/* Responsive */
@media (max-width: 768px) {
    .profesores-nav {
        width: 100%;
        height: auto;
        position: relative;
        top: 0;
    }
    
    .profesores-container {
        margin-left: 0;
        margin-top: 0;
    }
    
    .profesores-topbar {
        position: relative;
    }
}

/* Page header */
.page-header {
    margin-bottom: 30px;
}

.page-header h1 {
    color: var(--color-verde-principal);
    margin-bottom: 10px;
}

.page-header p {
    color: var(--color-gris);
}

/* Table container */
.table-container {
    overflow-x: auto;
}

/* Badges */
.badge {
    display: inline-block;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: bold;
}

.badge-success {
    background: #d4edda;
    color: #155724;
}

.badge-warning {
    background: #fff3e0;
    color: #f57c00;
}

.badge-info {
    background: #e3f2fd;
    color: #1976d2;
}

.badge-danger {
    background: #ffebee;
    color: #c62828;
}