/* admin.css - ESTILOS COMPLETOS PARA ADMIN */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', 'Roboto', sans-serif;
}

:root {
    --primary: #4361ee;
    --primary-dark: #3a56d4;
    --secondary: #7209b7;
    --success: #4cc9f0;
    --danger: #f72585;
    --warning: #f8961e;
    --dark: #1a1a2e;
    --light: #f8f9fa;
    --gray: #6c757d;
    --card-bg: rgba(255, 255, 255, 0.95);
}

body {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    color: #333;
    min-height: 100vh;
    padding: 20px;
    line-height: 1.6;
}

.admin-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* ===== TARJETAS ===== */
.card {
    background: var(--card-bg);
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
}

.login-card {
    max-width: 500px;
    margin: 50px auto;
    text-align: center;
    animation: fadeIn 0.5s ease;
}

.panel-card {
    animation: slideUp 0.5s ease;
}

/* ===== LOGIN ===== */
.logo {
    margin-bottom: 20px;
}

.logo i {
    font-size: 3rem;
    color: var(--primary);
    margin-bottom: 15px;
    display: block;
}

.logo h2 {
    color: var(--dark);
    font-size: 2rem;
}

.subtitle {
    color: var(--gray);
    margin-bottom: 30px;
    font-size: 1.1rem;
}

.input-group {
    position: relative;
    margin-bottom: 20px;
}

.input-group i {
    position: absolute;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray);
    font-size: 1.2rem;
}

.input-group input {
    width: 100%;
    padding: 18px 20px 18px 55px;
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    font-size: 1.1rem;
    transition: all 0.3s;
    background: white;
    color: #333;
}

.input-group input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.2);
}

.login-info {
    margin-top: 25px;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 10px;
    font-size: 0.9rem;
}

.warning {
    color: var(--danger);
    margin-top: 10px;
    font-size: 0.85rem;
}

/* ===== BOTONES ===== */
button {
    padding: 15px 25px;
    border: none;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.btn-primary {
    background: linear-gradient(to right, var(--primary), var(--secondary));
    color: white;
    width: 100%;
}

.btn-primary:hover {
    background: linear-gradient(to right, var(--primary-dark), #5a08a1);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.btn-success {
    background: linear-gradient(to right, #10b981, #059669);
    color: white;
    height: 56px;
    align-self: flex-end;
    min-width: 180px;
}

.btn-success:hover {
    background: linear-gradient(to right, #059669, #047857);
    transform: translateY(-2px);
}

.btn-secondary {
    background: rgba(67, 97, 238, 0.1);
    color: var(--primary);
    border: 2px solid rgba(67, 97, 238, 0.3);
}

.btn-secondary:hover {
    background: rgba(67, 97, 238, 0.2);
}

/* ===== PANEL HEADER ===== */
.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 2px solid #f1f5f9;
    flex-wrap: wrap;
    gap: 20px;
}

.header-title h2 {
    color: var(--dark);
    font-size: 1.8rem;
    margin-bottom: 5px;
}

.panel-subtitle {
    color: var(--gray);
    font-size: 1rem;
}

.stats {
    background: #eef2ff;
    padding: 10px 20px;
    border-radius: 50px;
    font-weight: 600;
    color: var(--primary);
}

/* ===== FORMULARIO ===== */
.form-section {
    background: #f8fafc;
    padding: 25px;
    border-radius: 15px;
    margin-bottom: 30px;
}

.form-section h3 {
    color: var(--dark);
    margin-bottom: 20px;
    font-size: 1.4rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 2fr auto;
    gap: 20px;
    align-items: end;
    margin-bottom: 25px;
}

@media (max-width: 768px) {
    .form-row {
        grid-template-columns: 1fr;
    }
}

.input-container {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.input-container label {
    color: var(--gray);
    font-weight: 600;
    font-size: 0.9rem;
}

.input-container input {
    padding: 15px;
    border: 2px solid #e2e8f0;
    border-radius: 10px;
    font-size: 1.1rem;
    transition: all 0.3s;
}

.input-container input:focus {
    outline: none;
    border-color: var(--primary);
}

.preview-box {
    background: white;
    padding: 20px;
    border-radius: 12px;
    border-left: 4px solid var(--primary);
}

.preview-box h4 {
    color: var(--dark);
    margin-bottom: 15px;
    font-size: 1.2rem;
}

.preview-content p {
    margin-bottom: 10px;
    font-size: 1.1rem;
}

.url-preview {
    display: flex;
    align-items: center;
    gap: 10px;
}

.url-preview i {
    color: var(--primary);
}

.url-preview code {
    background: #f1f5f9;
    padding: 8px 12px;
    border-radius: 6px;
    font-family: 'Courier New', monospace;
    color: #1e40af;
    font-size: 0.9rem;
    flex: 1;
    word-break: break-all;
}

/* ===== LISTA ASIGNACIONES ===== */
.assignments-section {
    margin: 30px 0;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
    flex-wrap: wrap;
    gap: 15px;
}

.assignments-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.assignment-card {
    background: white;
    border-radius: 15px;
    padding: 20px;
    border: 2px solid #f1f5f9;
    transition: all 0.3s;
    position: relative;
}

.assignment-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.assignment-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.assignment-header h4 {
    color: var(--dark);
    font-size: 1.3rem;
}

.card-number {
    background: var(--primary);
    color: white;
    padding: 5px 12px;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.9rem;
}

.assignment-details p {
    margin: 8px 0;
    color: #4b5563;
    font-size: 0.95rem;
}

.assignment-details strong {
    color: var(--dark);
}

.delete-btn {
    background: rgba(247, 37, 133, 0.1);
    color: var(--danger);
    border: none;
    padding: 8px 15px;
    border-radius: 8px;
    font-size: 0.9rem;
    margin-top: 15px;
    width: 100%;
    transition: all 0.3s;
}

.delete-btn:hover {
    background: rgba(247, 37, 133, 0.2);
}

.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 50px 20px;
    color: var(--gray);
}

.empty-state i {
    font-size: 3rem;
    color: #d1d5db;
    margin-bottom: 15px;
    display: block;
}

.empty-state p.hint {
    font-size: 0.9rem;
    margin-top: 5px;
}

/* ===== FOOTER ===== */
.panel-footer {
    margin-top: 40px;
    padding-top: 25px;
    border-top: 2px solid #f1f5f9;
}

.instructions {
    background: #f0f9ff;
    padding: 20px;
    border-radius: 12px;
    margin-bottom: 20px;
}

.instructions h4 {
    color: var(--dark);
    margin-bottom: 15px;
    font-size: 1.2rem;
}

.instructions ol {
    padding-left: 25px;
}

.instructions li {
    margin-bottom: 10px;
    color: #4b5563;
}

.status {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
    padding: 15px;
    background: #f8fafc;
    border-radius: 10px;
}

.connected {
    color: #059669;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

.timestamp {
    color: var(--gray);
    font-size: 0.9rem;
}

/* ===== ANIMACIONES ===== */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .admin-container {
        padding: 10px;
    }
    
    .card {
        padding: 20px;
    }
    
    .panel-header {
        flex-direction: column;
        align-items: stretch;
    }
    
    .section-header {
        flex-direction: column;
        align-items: stretch;
    }
    
    .assignments-grid {
        grid-template-columns: 1fr;
    }
    
    .status {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 480px) {
    .logo h2 {
        font-size: 1.5rem;
    }
    
    .input-group input {
        padding: 15px 15px 15px 45px;
    }
}