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

:root {
    --primary-color: #2c5530;
    --secondary-color: #4a7c59;
    --accent-color: #8fbc8f;
    --light-green: #e8f5e8;
    --text-color: #333;
    --text-light: #666;
    --border-color: #ddd;
    --error-color: #e74c3c;
    --success-color: #27ae60;
    --white: #ffffff;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --border-radius: 8px;
    --transition: all 0.3s ease;
}

/* Estilos Base */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background: linear-gradient(135deg, var(--light-green) 0%, #f8fff8 100%);
    min-height: 100vh;
    padding: 20px 0;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.form-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--white);
    padding: 30px;
    border-radius: var(--border-radius);
    margin-bottom: 30px;
    text-align: center;
    box-shadow: var(--shadow);
}

.form-header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    font-weight: 700;
}

.form-header .subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
    font-weight: 300;
}

/* Formulario */
.equipment-form {
    background: var(--white);
    padding: 40px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    margin-bottom: 20px;
}

.form-section {
    margin-bottom: 40px;
    padding-bottom: 30px;
    border-bottom: 2px solid var(--light-green);
}

.form-section:last-of-type {
    border-bottom: none;
    margin-bottom: 20px;
}

.form-section h2 {
    color: var(--primary-color);
    font-size: 1.5rem;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 3px solid var(--accent-color);
    display: inline-block;
}

.section-description {
    color: var(--text-light);
    margin-bottom: 25px;
    font-style: italic;
}

/* Filas y Grupos de Formulario */
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

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

.form-group label {
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 8px;
    font-size: 0.95rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 12px 15px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(76, 124, 89, 0.1);
}

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

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

/* Grid de Equipos */
.equipment-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.equipment-item {
    background: var(--light-green);
    padding: 20px;
    border-radius: var(--border-radius);
    border: 2px solid transparent;
    transition: var(--transition);
}

.equipment-item:hover {
    border-color: var(--accent-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.equipment-item label {
    font-weight: 600;
    color: var(--primary-color);
    display: block;
    margin-bottom: 8px;
    font-size: 1rem;
}

.equipment-item input {
    width: 100%;
    padding: 10px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1.1rem;
    text-align: center;
    font-weight: 600;
}

.equipment-item small {
    display: block;
    color: var(--text-light);
    font-size: 0.85rem;
    margin-top: 5px;
    font-style: italic;
}

/* Sección Total */
.total-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--white);
    padding: 20px;
    border-radius: var(--border-radius);
    text-align: center;
    margin-top: 20px;
}

.total-display {
    font-size: 1.3rem;
}

/* Botones */
.form-actions {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin-top: 30px;
}

.btn {
    padding: 15px 30px;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--white);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(44, 85, 48, 0.3);
}

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

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

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
}

.modal-content {
    background-color: var(--white);
    margin: 15% auto;
    padding: 30px;
    border-radius: var(--border-radius);
    width: 90%;
    max-width: 500px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    animation: modalSlideIn 0.3s ease-out;
}

@keyframes modalSlideIn {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-content h3 {
    color: var(--success-color);
    margin-bottom: 15px;
    font-size: 1.5rem;
}

.modal-content p {
    color: var(--text-color);
    margin-bottom: 20px;
}

/* Loading Overlay */
.loading-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.9);
    z-index: 9999;
    backdrop-filter: blur(3px);
}

.loading-spinner {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
}

.spinner {
    width: 60px;
    height: 60px;
    border: 4px solid var(--light-green);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

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

.loading-spinner p {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 1.1rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    
    .form-header h1 {
        font-size: 2rem;
    }
    
    .equipment-form {
        padding: 20px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .equipment-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .form-actions {
        flex-direction: column;
        gap: 10px;
    }
    
    .btn {
        padding: 12px 20px;
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .form-header {
        padding: 20px;
    }
    
    .form-header h1 {
        font-size: 1.5rem;
    }
    
    .equipment-form {
        padding: 15px;
    }
    
    .equipment-item {
        padding: 15px;
    }
}

/* Animaciones adicionales */
.equipment-item input:focus {
    background-color: rgba(143, 188, 143, 0.1);
    transform: scale(1.05);
}

.form-section {
    animation: fadeInUp 0.6s ease-out;
}

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

/* Mejoras de accesibilidad */
.form-group label::after {
    content: " *";
    color: var(--error-color);
    display: none;
}

.form-group input:required + label::after,
.form-group select:required + label::after {
    display: inline;
}

/* Estados de validación visual */
.form-group.error input,
.form-group.error select,
.form-group.error textarea {
    border-color: var(--error-color);
    background-color: rgba(231, 76, 60, 0.1);
}

.form-group.success input,
.form-group.success select,
.form-group.success textarea {
    border-color: var(--success-color);
    background-color: rgba(39, 174, 96, 0.1);
}