/* styles.css */

/* Variables CSS */
:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #16a085;
    --danger-color: #e74c3c;
    --warning-color: #f39c12;
    --success-color: #27ae60;
    --light-color: #ecf0f1;
    --dark-color: #34495e;
    --border-color: #bdc3c7;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 8px 15px rgba(0, 0, 0, 0.2);
    --border-radius: 8px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

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

body {
    font-family: var(--font-family);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: var(--dark-color);
    line-height: 1.6;
}

/* Contenedor principal */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 2rem;
    color: white;
}

.header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.header p {
    font-size: 1.2rem;
    opacity: 0.9;
}

.header i {
    margin-right: 0.5rem;
    color: var(--accent-color);
}

/* Navegación por pestañas */
.nav-tabs {
    display: flex;
    justify-content: center;
    margin-bottom: 2rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    padding: 0.5rem;
    backdrop-filter: blur(10px);
}

.tab-btn {
    background: transparent;
    border: none;
    padding: 1rem 1.5rem;
    color: white;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    border-radius: var(--border-radius);
    margin: 0 0.25rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.tab-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.tab-btn.active {
    background: white;
    color: var(--primary-color);
    box-shadow: var(--shadow);
}

.tab-btn i {
    font-size: 1.1rem;
}

/* Contenedor de formularios */
.form-container {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 2rem;
    margin-bottom: 2rem;
    display: none;
    opacity: 0;
    transform: translateY(20px);
    transition: var(--transition);
}

.form-container.active {
    display: block;
    opacity: 1;
    transform: translateY(0);
    animation: slideIn 0.5s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Header del formulario */
.form-header {
    text-align: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--light-color);
}

.form-header h2 {
    color: var(--primary-color);
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
}

.form-header i {
    color: var(--secondary-color);
    margin-right: 0.5rem;
}

/* Formulario */
.form {
    max-width: 800px;
    margin: 0 auto;
}

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

.form-group {
    margin-bottom: 1.5rem;
    position: relative;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--dark-color);
    font-weight: 600;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.form-group label i {
    color: var(--secondary-color);
    width: 16px;
    text-align: center;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 0.875rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
    background: white;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
    transform: translateY(-2px);
}

.form-group.focused {
    transform: scale(1.02);
}

.form-group input:invalid {
    border-color: var(--danger-color);
}

.form-group input:valid {
    border-color: var(--success-color);
}

/* Select styling */
.form-group select {
    cursor: pointer;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
    background-position: right 0.5rem center;
    background-repeat: no-repeat;
    background-size: 1.5em 1.5em;
    padding-right: 2.5rem;
    appearance: none;
}

/* Botones */
.form-actions {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 2px solid var(--light-color);
}

.btn {
    padding: 0.875rem 2rem;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    min-width: 140px;
    justify-content: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
    color: white;
    box-shadow: var(--shadow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
    filter: brightness(110%);
}

.btn-secondary {
    background: var(--light-color);
    color: var(--dark-color);
    border: 2px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--border-color);
    transform: translateY(-2px);
}

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

/* Efectos de hover para campos */
.form-group input:hover,
.form-group select:hover {
    border-color: var(--secondary-color);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

/* Estados de validación */
.form-group input:required:valid {
    border-left: 4px solid var(--success-color);
}

.form-group input:required:invalid:not(:placeholder-shown) {
    border-left: 4px solid var(--danger-color);
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }
    
    .header h1 {
        font-size: 2rem;
    }
    
    .nav-tabs {
        flex-wrap: wrap;
        gap: 0.5rem;
    }
    
    .tab-btn {
        flex: 1;
        min-width: 120px;
        justify-content: center;
        padding: 0.75rem 1rem;
        font-size: 0.9rem;
    }
    
    .form-container {
        padding: 1.5rem;
    }
    
    .form-row {
        grid-template-columns: 1fr;
        gap: 0;
    }
    
    .form-actions {
        flex-direction: column;
        align-items: stretch;
    }
    
    .btn {
        width: 100%;
        margin-bottom: 0.5rem;
    }
    
    .form-header h2 {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .header h1 {
        font-size: 1.8rem;
    }
    
    .header p {
        font-size: 1rem;
    }
    
    .tab-btn {
        padding: 0.5rem 0.75rem;
        font-size: 0.85rem;
    }
    
    .tab-btn i {
        font-size: 1rem;
    }
    
    .form-container {
        padding: 1rem;
    }
    
    .form-group input,
    .form-group select {
        padding: 0.75rem;
    }
}

/* Animaciones adicionales */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.form-group {
    animation: fadeIn 0.6s ease-out;
}

.form-group:nth-child(1) { animation-delay: 0.1s; }
.form-group:nth-child(2) { animation-delay: 0.2s; }
.form-group:nth-child(3) { animation-delay: 0.3s; }
.form-group:nth-child(4) { animation-delay: 0.4s; }
.form-group:nth-child(5) { animation-delay: 0.5s; }

/* Mejoras de accesibilidad */
.btn:focus,
.tab-btn:focus,
input:focus,
select:focus {
    outline: 3px solid rgba(52, 152, 219, 0.5);
    outline-offset: 2px;
}

/* Modo oscuro para dispositivos que lo prefieran */
@media (prefers-color-scheme: dark) {
    .form-container {
        background: #2c3e50;
        color: white;
    }
    
    .form-group input,
    .form-group select {
        background: #34495e;
        color: white;
        border-color: #4a5f7a;
    }
    
    .form-header h2 {
        color: white;
    }
    
    .form-group label {
        color: #ecf0f1;
    }
}