/**
 * EduQuick - Estilos para la página de Registro
 * 
 * Siguiendo principios de diseño limpio y arquitectura modular
 */

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 
                 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #1e293b;
    background: var(--color-primary);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 1rem;
}

/* Contenedor principal */
.register-container {
    width: 100%;
    max-width: 700px;
    animation: fadeIn 0.5s ease-in-out;
}

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

/* Tarjeta de registro */
.register-card {
    background: #ffffff;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    padding: 2.5rem;
    transition: box-shadow 0.3s ease;
}

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

.register-logo {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
    letter-spacing: -0.5px;
}

.register-subtitle {
    font-size: 1.125rem;
    color: #64748b;
    font-weight: 600;
}

/* Formulario */
.register-form {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.form-section {
    border: none;
    padding: 0;
}

.section-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: #1e293b;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid #e2e8f0;
}

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

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: #334155;
}

.optional {
    font-weight: 400;
    color: #94a3b8;
    font-size: 0.8125rem;
}

.form-input {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 0.9375rem;
    border: 2px solid #e2e8f0;
    border-radius: 10px;
    background: #ffffff;
    color: #1e293b;
    transition: all 0.2s ease;
}

.form-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.form-input::placeholder {
    color: #94a3b8;
}

.form-input:invalid:not(:placeholder-shown):not(:focus) {
    border-color: #ef4444;
}

.form-hint {
    font-size: 0.75rem;
    color: #64748b;
}

.form-error {
    font-size: 0.75rem;
    color: #ef4444;
    display: none;
}

.form-error.visible {
    display: block;
}

/* Acciones del formulario */
.form-actions {
    margin-top: 0.5rem;
}

.btn-primary {
    width: 100%;
    padding: 0.875rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    color: #ffffff;
    background: var(--color-primary);
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
}

.btn-primary:hover {
    background: var(--color-primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
}

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

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* Feedback del formulario */
.form-feedback {
    padding: 1rem;
    border-radius: 10px;
    font-size: 0.875rem;
    display: none;
    animation: slideDown 0.3s ease;
}

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

.form-feedback.visible {
    display: block;
}

.form-feedback.success {
    background: #dcfce7;
    color: #166534;
    border: 1px solid #22c55e;
}

.form-feedback.error {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #ef4444;
}

/* Footer */
.register-footer {
    margin-top: 2rem;
    text-align: center;
    font-size: 0.875rem;
    color: #64748b;
    padding-top: 1.5rem;
    border-top: 1px solid #e2e8f0;
}

.link-primary {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.2s ease;
}

.link-primary:hover {
    color: var(--color-primary-hover);
    text-decoration: underline;
}

/* Responsivo */
@media (max-width: 640px) {
    body {
        padding: 1rem;
    }

    .register-card {
        padding: 2rem 1.5rem;
    }

    .register-logo {
        font-size: 2rem;
    }

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

    .section-title {
        font-size: 1rem;
    }

    .form-input,
    .btn-primary {
        font-size: 0.9375rem;
    }
}

/* Modo oscuro (opcional para futuro) */
@media (prefers-color-scheme: dark) {
    body {
        background: var(--color-primary-hover);
    }
}