@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Outfit:wght@400;500;600;700&display=swap');

:root {
    --primary: #002b5c;
    --primary-hover: #001b3d;
    --primary-light: #e8f0fe;
    
    --uas-gold: #f2a900;
    --uas-gold-hover: #d49400;
    --uas-gold-light: #fef8e8;
    
    --bg-page: #f8f9fa;
    --bg-card: #ffffff;
    
    --text-main: #002b5c;
    --text-body: #1e293b;
    --text-muted: #64748b;
    --text-light: #94a3b8;
    
    --border-color: #e2e8f0;
    --border-focus: #002b5c;
    
    --success: #198754;
    --success-bg: #ecfdf5;
    --success-border: #a7f3d0;
    
    --error: #dc3545;
    --error-bg: #fef2f2;
    --error-border: #fca5a5;
    
    --warning: #f2a900;
    --warning-bg: #fef8e8;
    --warning-border: #ffe69c;
    
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 43, 92, 0.06), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --shadow-lg: 0 10px 25px -3px rgba(0, 43, 92, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
    
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    
    --transition: all 0.2s ease-in-out;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', 'Outfit', sans-serif;
    background-color: var(--bg-page);
    color: var(--text-body);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

/* Contenedor General */
.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header / Navbar */
.navbar {
    background-color: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: var(--primary);
    font-weight: 700;
    font-size: 1.25rem;
}

.navbar-brand span {
    color: var(--primary);
    font-weight: 800;
    letter-spacing: -0.01em;
}

.navbar-user {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user-info {
    text-align: right;
}

.user-name {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-main);
}

.user-role {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    background-color: var(--primary-light);
    color: var(--primary);
    padding: 0.15rem 0.5rem;
    border-radius: var(--radius-sm);
    display: inline-block;
    margin-top: 0.1rem;
}

/* Contenido Principal */
.main-content {
    flex: 1;
    padding: 2rem;
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
}

/* Pantalla de Login */
.login-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    background: radial-gradient(circle at top right, rgba(242, 169, 0, 0.08), transparent 45%), linear-gradient(135deg, rgba(0, 43, 92, 0.04) 0%, var(--bg-page) 100%);
}

.login-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 440px;
    padding: 2.5rem;
    text-align: center;
    border-top: 4px solid var(--primary);
}

.login-header {
    margin-bottom: 2rem;
}

.logo-placeholder {
    width: 68px;
    height: 68px;
    background-color: #ffffff;
    color: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    font-weight: 700;
    margin: 0 auto 1rem;
    border: 2px solid var(--uas-gold);
    box-shadow: 0 4px 10px rgba(0, 43, 92, 0.12);
    overflow: hidden;
}

.login-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 0.25rem;
}

.login-subtitle {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Formularios */
.form-group {
    margin-bottom: 1.25rem;
    text-align: left;
}

.form-label {
    display: block;
    font-weight: 500;
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
    color: var(--text-main);
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    font-family: inherit;
    font-size: 0.95rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: #ffffff;
    color: var(--text-main);
    transition: var(--transition);
    outline: none;
}

.form-control:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

/* Botones */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.btn-primary {
    background-color: var(--primary);
    color: #ffffff;
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
}

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

.btn-secondary {
    background-color: var(--bg-page);
    border-color: var(--border-color);
    color: var(--text-main);
}

.btn-secondary:hover {
    background-color: var(--border-color);
}

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

.btn-danger:hover {
    background-color: var(--error);
    color: #ffffff;
}

.btn-block {
    display: flex;
    width: 100%;
}

/* Tarjetas (Cards) */
.card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.25rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

.card-title {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text-main);
}

/* Alertas */
.alert {
    padding: 0.75rem 1rem;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    margin-bottom: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    border: 1px solid transparent;
    text-align: left;
}

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

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

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

/* Tablas */
.table-responsive {
    overflow-x: auto;
    width: 100%;
}

.table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.925rem;
}

.table th {
    padding: 0.85rem 1rem;
    font-weight: 600;
    color: var(--text-muted);
    border-bottom: 2px solid var(--border-color);
    background-color: var(--bg-page);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.table td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-main);
    vertical-align: middle;
}

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

.table tr:hover td {
    background-color: var(--bg-page);
}

/* Badges / Etiquetas de Estado */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.65rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 9999px;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

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

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

.badge-warning {
    background-color: var(--warning-bg);
    color: var(--warning);
}

.badge-info {
    background-color: var(--primary-light);
    color: var(--primary);
}

/* Layout del Dashboard y Rejilla */
.grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

@media (min-width: 768px) {
    .grid-2 {
        grid-template-columns: repeat(2, 1fr);
    }
    .grid-3 {
        grid-template-columns: repeat(3, 1fr);
    }
    .grid-4 {
        grid-template-columns: repeat(4, 1fr);
    }
    .grid-sidebar {
        grid-template-columns: 280px 1fr;
    }
}

/* Cards de Estadisticas */
.stat-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--shadow-sm);
}

.stat-info h3 {
    font-size: 0.875rem;
    color: var(--text-muted);
    font-weight: 500;
    margin-bottom: 0.25rem;
}

.stat-info p {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-main);
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    background-color: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}

/* Panel del Alumno - Secciones Especiales */
.profile-card {
    text-align: center;
    padding: 2.5rem 1.5rem;
}

.profile-avatar {
    width: 80px;
    height: 80px;
    background-color: var(--primary-light);
    color: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 600;
    margin: 0 auto 1rem;
}

.qr-container {
    background-color: #ffffff;
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    display: inline-block;
    margin: 1.5rem auto;
}

.qr-image {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Pestañas (Tabs) en el Dashboard de Administrador */
.tabs-nav {
    display: flex;
    gap: 0.5rem;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 1.5rem;
    overflow-x: auto;
}

.tab-btn {
    padding: 0.75rem 1.25rem;
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 500;
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--text-muted);
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.tab-btn:hover {
    color: var(--text-main);
}

.tab-btn.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
    font-weight: 600;
}

.tab-content {
    display: none;
}

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

/* Verificador - Vista de Escaneo e Historial de Registros */
.scanner-card {
    border-top: 4px solid var(--primary);
}

.recent-logs {
    max-height: 350px;
    overflow-y: auto;
}

.log-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
}

.log-item:last-child {
    border-bottom: none;
}

.log-details h4 {
    font-size: 0.9rem;
    font-weight: 600;
}

.log-details p {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Utilidades */
.mt-4 { margin-top: 1rem; }
.mb-4 { margin-bottom: 1rem; }
.text-center { text-align: center; }
.d-flex { display: flex; }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: 0.5rem; }
.w-full { width: 100%; }

/* Modal sencillo (para inserción rápida o edición) */
.form-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
}

@media (min-width: 640px) {
    .form-row-2 {
        grid-template-columns: 1fr 1fr;
    }
}

/* ================================================================
   RESPONSIVE STYLES - Mobile & Tablet
   ================================================================ */

/* Tablets and smaller (max-width: 768px) */
@media (max-width: 768px) {
    .navbar {
        padding: 0.75rem 1rem;
        flex-wrap: wrap;
        gap: 0.5rem;
    }

    .navbar-brand {
        font-size: 1.05rem;
        gap: 0.5rem;
    }

    .navbar-brand .logo-placeholder {
        width: 30px;
        height: 30px;
        font-size: 0.8rem;
    }

    .navbar-user {
        gap: 0.5rem;
        flex-wrap: wrap;
        justify-content: flex-end;
    }

    .navbar-user .btn {
        padding: 0.4rem 0.65rem;
        font-size: 0.75rem;
    }

    .user-info {
        display: none;
    }

    .main-content {
        padding: 1rem;
    }

    .card {
        padding: 1rem;
        border-radius: var(--radius-md);
    }

    .card-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }

    .card-title {
        font-size: 1rem;
    }

    .profile-card {
        padding: 1.5rem 1rem;
    }

    .profile-avatar {
        width: 64px;
        height: 64px;
        font-size: 1.5rem;
    }

    .grid-sidebar {
        grid-template-columns: 1fr !important;
    }

    /* Tables: make them scroll horizontally */
    .table {
        font-size: 0.8rem;
    }

    .table th,
    .table td {
        padding: 0.6rem 0.5rem;
        white-space: nowrap;
    }

    /* Stat cards */
    .stat-card {
        padding: 1rem;
    }

    .stat-info p {
        font-size: 1.35rem;
    }

    .stat-icon {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }

    /* Tabs */
    .tabs-nav {
        gap: 0.25rem;
        -webkit-overflow-scrolling: touch;
    }

    .tab-btn {
        padding: 0.6rem 0.75rem;
        font-size: 0.85rem;
        min-height: 42px;
    }

    /* Modals */
    .modal-card {
        width: 95%;
        max-width: 500px;
        max-height: 90vh;
        overflow-y: auto;
        margin: 0.5rem;
    }

    /* Prevención de auto-zoom en iOS Safari */
    .form-control, input[type="text"], input[type="password"], input[type="file"], select, textarea {
        font-size: 16px !important;
    }
}

/* Phones only (max-width: 480px) */
@media (max-width: 480px) {
    .navbar {
        padding: 0.6rem 0.75rem;
        gap: 0.5rem;
    }

    .navbar-brand {
        font-size: 0.95rem;
    }

    .navbar-brand span {
        font-size: 0.9rem;
    }

    .navbar-user {
        gap: 0.35rem;
        flex-wrap: wrap;
        width: 100%;
        justify-content: flex-end;
    }

    .navbar-user .btn {
        padding: 0.4rem 0.6rem;
        font-size: 0.78rem;
        min-height: 36px;
    }

    .navbar-user .btn svg {
        margin: 0;
        flex-shrink: 0;
    }

    .main-content {
        padding: 0.65rem;
    }

    .card {
        padding: 0.85rem;
        margin-bottom: 1rem;
    }

    .card-header {
        padding-bottom: 0.5rem;
        margin-bottom: 0.75rem;
    }

    .card-title {
        font-size: 0.95rem;
    }

    .profile-card {
        padding: 1.25rem 0.85rem;
    }

    .profile-card h2 {
        font-size: 1.1rem !important;
    }

    .profile-card p {
        font-size: 0.8rem !important;
    }

    .profile-avatar {
        width: 56px;
        height: 56px;
        font-size: 1.25rem;
        margin-bottom: 0.75rem;
    }

    .qr-container {
        padding: 0.75rem;
        margin: 1rem auto;
    }

    .qr-image {
        width: 160px !important;
        height: 160px !important;
    }

    .qr-help-text {
        font-size: 0.78rem;
    }

    /* QR action buttons */
    .qr-actions {
        flex-direction: column !important;
        gap: 0.5rem !important;
    }

    /* Badge sizes */
    .badge {
        font-size: 0.7rem;
        padding: 0.2rem 0.5rem;
    }

    /* Buttons */
    .btn {
        padding: 0.6rem 0.85rem;
        font-size: 0.85rem;
        min-height: 38px;
    }

    .btn-block {
        font-size: 0.85rem;
        width: 100%;
    }

    /* Login card */
    .login-card {
        padding: 1.25rem;
    }

    .login-title {
        font-size: 1.25rem;
    }

    .logo-placeholder {
        width: 52px;
        height: 52px;
        font-size: 1.4rem;
    }

    /* Form controls */
    .form-control {
        padding: 0.65rem 0.85rem;
    }

    /* Stats */
    .stat-card {
        padding: 0.85rem;
    }

    .stat-info h3 {
        font-size: 0.75rem;
    }

    .stat-info p {
        font-size: 1.15rem;
    }

    .stat-icon {
        width: 36px;
        height: 36px;
        font-size: 0.9rem;
    }

    /* Tables — mobile responsive styling */
    .table {
        font-size: 0.75rem;
    }

    .table th,
    .table td {
        padding: 0.5rem 0.4rem;
    }

    /* Pagination container */
    .pagination-container {
        flex-direction: column !important;
        align-items: flex-start !important;
        gap: 0.75rem !important;
        padding: 0.75rem 1rem !important;
    }

    .pagination-buttons {
        flex-wrap: wrap !important;
        gap: 0.25rem !important;
    }

    /* Modal on phones */
    .modal-card {
        width: 98%;
        max-height: 92vh;
        overflow-y: auto;
        border-radius: var(--radius-md);
    }

    .modal-header {
        padding: 0.75rem 1rem;
    }

    .modal-title {
        font-size: 1rem;
    }

    .modal-body {
        padding: 1rem !important;
    }

    .modal-footer {
        padding: 0.75rem 1rem !important;
    }

    /* Tabs */
    .tabs-nav {
        gap: 0.15rem;
        padding-bottom: 0.25rem;
    }

    .tab-btn {
        padding: 0.5rem 0.65rem;
        font-size: 0.78rem;
    }

    /* Scanner card */
    .scanner-card {
        border-top-width: 3px;
    }

    /* Alerts */
    .alert {
        font-size: 0.8rem;
        padding: 0.6rem 0.85rem;
    }
}