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

:root {
    --primary-color: #06b6d4;
    --primary-dark: #06b6d4;
    --white: #ffffff;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    min-height: 100vh;
    background: var(--white);
    padding: 20px 0;
    color: var(--gray-800);
}

.register-container {
    background: var(--white);
    border: 1px solid rgba(6, 182, 212, 0.2);
    border-radius: 20px;
    padding: 40px;
    width: 100%;
    max-width: 900px;
    box-shadow: 0 4px 16px rgba(6, 182, 212, 0.1);
    margin: 0 auto;
    max-height: 90vh;
    overflow-y: auto;
}

.register-container::-webkit-scrollbar {
    width: 6px;
}

.register-container::-webkit-scrollbar-track {
    background: var(--gray-100);
    border-radius: 3px;
}

.register-container::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 3px;
}

.register-container::-webkit-scrollbar-thumb:hover {
    background: #0891b2;
}

.header-section {
    text-align: center;
    margin-bottom: 40px;
    position: relative;
}

.header-section::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background: var(--primary-color);
    border-radius: 2px;
}

.welcome-title {
    color: var(--gray-800);
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 8px;
}

.subtitle {
    color: var(--gray-500);
    font-size: 16px;
    font-weight: 500;
}

.form-sections {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.form-section {
    background: var(--gray-50);
    padding: 25px;
    border-radius: 15px;
    border: 1px solid var(--gray-200);
    transition: all 0.3s ease;
}

.form-section:hover {
    box-shadow: 0 4px 12px rgba(6, 182, 212, 0.1);
}

.section-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.section-title i {
    color: var(--primary-color);
    font-size: 20px;
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

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

.form-group.full-width {
    grid-column: 1 / -1;
}

.form-group label {
    display: block;
    color: var(--gray-700);
    font-size: 14px;
    margin-bottom: 8px;
    font-weight: 600;
}

.label {
    display: block;
    color: var(--gray-700);
    font-size: 14px;
    margin-bottom: 8px;
    font-weight: 600;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 14px;
    border: 2px solid var(--gray-200);
    border-radius: 8px;
    background: var(--white);
    color: var(--gray-800);
    font-size: 14px;
    transition: all 0.3s ease;
    font-weight: 500;
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--gray-400);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    background: var(--gray-50);
    box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.1);
}

.form-group input:hover,
.form-group select:hover,
.form-group textarea:hover {
    border-color: var(--gray-300);
}

.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6,9 12,15 18,9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 16px;
}

.button-group {
    display: flex;
    gap: 15px;
    margin-top: 40px;
    justify-content: center;
}

.register-btn {
    padding: 14px 32px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(6, 182, 212, 0.3);
    min-width: 200px;
}

.register-btn:hover {
    background: #0891b2;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(6, 182, 212, 0.4);
}

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

.back-btn {
    padding: 14px 24px;
    background: var(--gray-100);
    color: var(--gray-600);
    border: 2px solid var(--gray-200);
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.back-btn:hover {
    background: var(--gray-200);
    color: var(--gray-700);
    transform: translateY(-2px);
}

.login-link {
    text-align: center;
    margin-top: 30px;
    font-size: 14px;
    color: var(--gray-600);
    font-weight: 500;
    padding-top: 20px;
    border-top: 1px solid var(--gray-200);
}

.login-link a {
    color: var(--primary-color);
    font-weight: 600;
    text-decoration: none;
}

.login-link a:hover {
    text-decoration: underline;
}

.error-message {
    color: #ef4444;
    font-size: 12px;
    margin-top: 5px;
    display: none;
}

.form-group.error input,
.form-group.error select {
    border-color: #ef4444;
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.form-group.error .error-message {
    display: block;
}

/* Responsive */
@media (max-width: 768px) {
    .form-sections {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .form-grid {
        grid-template-columns: 1fr;
    }

    .register-container {
        padding: 30px 20px;
        margin: 10px;
    }

    .welcome-title {
        font-size: 24px;
    }

    .button-group {
        flex-direction: column;
    }

    .register-btn {
        min-width: auto;
    }
}

@media (max-width: 480px) {
    .register-container {
        padding: 20px 15px;
    }

    .welcome-title {
        font-size: 20px;
    }

    .form-section {
        padding: 20px;
    }
}

/* Animaciones */
.register-container {
    animation: fadeInUp 0.6s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.form-section {
    animation: slideIn 0.5s ease-out forwards;
    opacity: 0;
    transform: translateY(15px);
}

.form-section:nth-child(1) {
    animation-delay: 0.1s;
}

.form-section:nth-child(2) {
    animation-delay: 0.2s;
}

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

select.form-control {
    width: 100%;
    padding: 12px;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    font-size: 14px;
    background-color: #fff;
    transition: all 0.3s ease;
    cursor: pointer;
}

select.form-control:focus {
    outline: none;
    border-color: #4a90e2;
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
}

select.form-control option {
    padding: 10px;
}

select.form-control:disabled {
    background-color: #f5f5f5;
    cursor: not-allowed;
}