/* =====================================================================
   HOJA DE ESTILOS PROFESIONAL (style.css)
   Acrónimos estéticos: Gradientes suaves, Glassmorfismo y Micro-animaciones
   ===================================================================== */

:root {
    --bg-gradient: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    --card-bg: rgba(255, 255, 255, 0.9);
    --card-border: rgba(255, 255, 255, 0.6);
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    
    /* Paleta de colores Premium */
    --primary: #4f46e5;
    --primary-gradient: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
    --primary-hover: #4338ca;
    --success: #10b981;
    --success-light: #d1fae5;
    --success-dark: #065f46;
    --danger: #ef4444;
    --danger-light: #fee2e2;
    --danger-dark: #991b1b;
    --warning: #f59e0b;
    --warning-light: #fef3c7;
    --warning-dark: #92400e;
    
    --border-color: #e2e8f0;
    --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.05), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Outfit', sans-serif;
}

body {
    background: var(--bg-gradient);
    color: var(--text-primary);
    min-height: 100vh;
    padding: 3rem 2rem;
    display: flex;
    justify-content: center;
}

.container {
    width: 100%;
    max-width: 1200px;
}

/* --- CABECERA --- */
header {
    margin-bottom: 3rem;
    text-align: center;
}

header h1 {
    font-size: 2.6rem;
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.5rem;
    letter-spacing: -0.5px;
}

header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    font-weight: 300;
}

/* --- NAVEGACIÓN POR PESTAÑAS (GLASSMORPHISM) --- */
.tabs {
    display: inline-flex;
    background: rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--card-border);
    padding: 0.4rem;
    border-radius: 30px;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-sm);
}

.tab-btn {
    background: none;
    border: none;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-secondary);
    padding: 0.7rem 2rem;
    cursor: pointer;
    border-radius: 25px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.tab-btn.active {
    background: var(--primary-gradient);
    color: white;
    box-shadow: 0 4px 10px rgba(79, 70, 229, 0.3);
}

/* --- TARJETAS DE CONTENIDO (TABS) --- */
.tab-content {
    display: none;
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--card-border);
    padding: 3rem;
    border-radius: 24px;
    box-shadow: var(--shadow-lg);
    animation: fadeIn 0.4s ease;
}

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

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* --- ELEMENTOS DE FORMULARIO --- */
h2 {
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 2rem;
    color: #0f172a;
    position: relative;
    padding-bottom: 0.5rem;
}

h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 4px;
    background: var(--primary-gradient);
    border-radius: 2px;
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 2.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.form-group.full-width {
    grid-column: span 2;
}

label {
    font-size: 0.95rem;
    font-weight: 600;
    color: #475569;
}

input[type="text"], input[type="number"], select {
    width: 100%;
    padding: 0.9rem 1.2rem;
    border: 1.5px solid var(--border-color);
    border-radius: 12px;
    font-size: 1rem;
    outline: none;
    transition: all 0.3s;
    background-color: #fafbfc;
}

input:focus, select:focus {
    border-color: var(--primary);
    background-color: white;
    box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.1);
}

/* --- CARGA DRAG & DROP DE ARCHIVOS --- */
.file-upload-box {
    border: 2px dashed var(--border-color);
    padding: 2.5rem 1.5rem;
    text-align: center;
    border-radius: 16px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    background-color: #f8fafc;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.8rem;
}

.file-upload-box:hover {
    border-color: var(--primary);
    background-color: #f5f3ff;
    transform: translateY(-2px);
}

.file-upload-box input {
    display: none;
}

.file-upload-box svg {
    width: 48px;
    height: 48px;
    color: #94a3b8;
    transition: color 0.3s;
}

.file-upload-box:hover svg {
    color: var(--primary);
}

.file-upload-box span {
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
}

/* --- BOTÓN PREMIUM --- */
.submit-btn {
    background: var(--primary-gradient);
    color: white;
    border: none;
    padding: 1.1rem 2rem;
    border-radius: 14px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    width: 100%;
    box-shadow: 0 4px 15px rgba(79, 70, 229, 0.3);
}

.submit-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(79, 70, 229, 0.4);
}

.submit-btn:active {
    transform: translateY(1px);
}

/* --- TABLAS ADMINISTRATIVAS --- */
.admin-table-container {
    overflow-x: auto;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    background: white;
    box-shadow: var(--shadow-sm);
}

table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

th, td {
    padding: 1.2rem 1.5rem;
    font-size: 0.95rem;
}

th {
    background-color: #f8fafc;
    color: #475569;
    font-weight: 700;
    border-bottom: 2px solid var(--border-color);
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 0.5px;
}

td {
    border-bottom: 1px solid var(--border-color);
    vertical-align: middle;
}

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

tr:hover td {
    background-color: #fcfdfe;
}

/* --- ETIQUETAS DE ESTADO (BADGES) --- */
.badge {
    padding: 0.4rem 0.8rem;
    border-radius: 30px;
    font-weight: 700;
    font-size: 0.8rem;
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
}

.badge-success { background-color: var(--success-light); color: var(--success-dark); }
.badge-danger { background-color: var(--danger-light); color: var(--danger-dark); }
.badge-warning { background-color: var(--warning-light); color: var(--warning-dark); }

/* --- ACCIONES --- */
.btn-action {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    font-size: 0.85rem;
    transition: all 0.2s;
}

.btn-approve {
    background-color: #ecfdf5;
    color: var(--success);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

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

.btn-reject {
    background-color: #fef2f2;
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

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

/* --- PANTALLA DE CARGA (LOADING OVERLAY) --- */
.loading-overlay {
    display: none;
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background-color: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    justify-content: center;
    align-items: center;
    flex-direction: column;
    z-index: 2000;
    color: white;
}

.spinner {
    width: 60px;
    height: 60px;
    border: 5px solid rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    border-left-color: white;
    animation: spin 1s cubic-bezier(0.5, 0, 0.5, 1) infinite;
    margin-bottom: 1.5rem;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}