/* ================================
   VARIABLES CSS PARA REGISTRO HARMONIOSO
================================ */
:root {
    /* Colores principales - Paleta cuidado capilar */
    --color-sage-green: #8db596;
    --color-warm-cream: #f7f5f0;
    --color-soft-brown: #a67c6a;
    --color-deep-forest: #4a6741;
    --color-golden-honey: #d4a574;
    --color-charcoal: #2c2c2c;
    --color-warm-gray: #8a8374;
    --color-mint-fresh: rgba(141, 181, 150, 0.1);
    --color-cream-base: #f5f3f0;
    --color-success: #4caf50;
    --color-error: #f44336;
    
    /* Gradientes naturales */
    --gradient-primary: linear-gradient(135deg, var(--color-sage-green), var(--color-soft-brown));
    --gradient-soft: linear-gradient(135deg, rgba(141, 181, 150, 0.1), rgba(166, 124, 106, 0.1));
    --gradient-background: linear-gradient(135deg, #f7f5f0 0%, #f5f3f0 50%, #f0ede8 100%);
    
    /* Fuentes */
    --font-serif: 'Playfair Display', serif;
    --font-sans: 'Inter', sans-serif;
    
    /* Transiciones */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.2s ease;
    
    /* Sombras naturales */
    --shadow-soft: 0 4px 20px rgba(74, 103, 65, 0.08);
    --shadow-medium: 0 8px 30px rgba(74, 103, 65, 0.12);
    --shadow-focus: 0 0 0 3px rgba(141, 181, 150, 0.2);
}

/* ================================
   RESET Y BASE
================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-sans);
    line-height: 1.6;
    color: var(--color-charcoal);
    background: var(--gradient-background);
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

/* ================================
   FONDO DECORATIVO
================================ */
.register-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.bg-pattern {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(141, 181, 150, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(166, 124, 106, 0.1) 0%, transparent 50%);
}

.bg-gradient {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-background);
}

/* ================================
   CONTENEDOR PRINCIPAL
================================ */
.register-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: clamp(1rem, 5vw, 2rem);
    position: relative;
}

.register-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: 24px;
    box-shadow: var(--shadow-medium);
    padding: clamp(2rem, 6vw, 3rem);
    width: 100%;
    max-width: 600px;
    position: relative;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.register-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: 24px 24px 0 0;
}

/* ================================
   HEADER DEL REGISTRO
================================ */
.register-header {
    text-align: center;
    margin-bottom: clamp(2rem, 5vw, 2.5rem);
}

.brand-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.logo-icon {
    width: clamp(3rem, 8vw, 4rem);
    height: clamp(3rem, 8vw, 4rem);
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: clamp(1.2rem, 3vw, 1.8rem);
    box-shadow: var(--shadow-soft);
    animation: breathe 4s ease-in-out infinite;
}

@keyframes breathe {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.brand-info h1 {
    font-family: var(--font-serif);
    font-size: clamp(1.5rem, 4vw, 2rem);
    font-weight: 400;
    color: var(--color-deep-forest);
    letter-spacing: 1px;
    margin-bottom: 0.2rem;
}

.brand-info p {
    font-size: clamp(0.8rem, 2vw, 0.9rem);
    color: var(--color-warm-gray);
    font-weight: 300;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.welcome-text h2 {
    font-family: var(--font-serif);
    font-size: clamp(1.5rem, 4vw, 1.8rem);
    font-weight: 400;
    color: var(--color-deep-forest);
    margin-bottom: 0.5rem;
}

.welcome-text p {
    font-size: clamp(0.9rem, 2.5vw, 1rem);
    color: var(--color-warm-gray);
    font-weight: 300;
    line-height: 1.5;
}

/* ================================
   MENSAJES DE ERROR Y ÉXITO
================================ */
.error-message {
    background: linear-gradient(135deg, #fee, #fdd);
    border: 1px solid #fbb;
    border-radius: 12px;
    padding: 1rem 1.2rem;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.8rem;
    color: var(--color-error);
    font-size: 0.9rem;
    animation: slideIn 0.3s ease-out;
}

.success-message {
    background: linear-gradient(135deg, #f0fff4, #e6fffa);
    border: 1px solid #9ae6b4;
    border-radius: 12px;
    padding: 1rem 1.2rem;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.8rem;
    color: var(--color-success);
    font-size: 0.9rem;
    animation: slideIn 0.3s ease-out;
}

.error-message i,
.success-message i {
    font-size: 1.1rem;
    flex-shrink: 0;
}

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

/* ================================
   FORMULARIO
================================ */
.register-form {
    margin-bottom: 1.5rem;
}

.form-row {
    display: grid;
    gap: 1.5rem;
    margin-bottom: clamp(1.5rem, 4vw, 2rem);
}

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

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

.form-group {
    width: 100%;
}

.form-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: clamp(0.9rem, 2.5vw, 1rem);
    font-weight: 500;
    color: var(--color-deep-forest);
    margin-bottom: 0.8rem;
    letter-spacing: 0.3px;
}

.form-label i {
    font-size: 0.9rem;
    color: var(--color-sage-green);
}

.input-wrapper {
    position: relative;
}

.form-input {
    width: 100%;
    padding: clamp(0.8rem, 3vw, 1rem) clamp(1rem, 3vw, 1.2rem);
    border: 2px solid rgba(141, 181, 150, 0.2);
    border-radius: 12px;
    font-size: clamp(0.9rem, 2.5vw, 1rem);
    font-family: var(--font-sans);
    color: var(--color-charcoal);
    background: rgba(255, 255, 255, 0.8);
    transition: var(--transition);
    outline: none;
}

.form-input::placeholder {
    color: var(--color-warm-gray);
    font-weight: 300;
}

.form-input:focus {
    border-color: var(--color-sage-green);
    background: white;
    box-shadow: var(--shadow-focus);
}

.form-input.error {
    border-color: var(--color-error);
    background: rgba(254, 238, 238, 0.8);
}

.form-input:hover:not(:focus) {
    border-color: rgba(141, 181, 150, 0.4);
}

.input-focus-line {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    border-radius: 0 0 12px 12px;
    transition: var(--transition);
}

.input-wrapper.focused .input-focus-line {
    width: 100%;
}

.password-toggle {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--color-warm-gray);
    font-size: 0.9rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 6px;
    transition: var(--transition);
}

.password-toggle:hover {
    color: var(--color-sage-green);
    background: var(--color-mint-fresh);
}

.password-toggle:focus {
    outline: 2px solid var(--color-sage-green);
    outline-offset: 2px;
}

/* ================================
   OPCIONES DEL FORMULARIO
================================ */
.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.checkbox-wrapper {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    cursor: pointer;
    user-select: none;
}

.checkbox-input {
    display: none;
}

.checkbox-custom {
    width: 18px;
    height: 18px;
    border: 2px solid rgba(141, 181, 150, 0.4);
    border-radius: 4px;
    position: relative;
    transition: var(--transition);
    background: white;
}

.checkbox-custom::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 5px;
    width: 4px;
    height: 8px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
    opacity: 0;
    transition: var(--transition);
}

.checkbox-input:checked + .checkbox-custom {
    background: var(--color-sage-green);
    border-color: var(--color-sage-green);
}

.checkbox-input:checked + .checkbox-custom::after {
    opacity: 1;
}

.checkbox-wrapper:hover .checkbox-custom {
    border-color: var(--color-sage-green);
    box-shadow: 0 0 0 2px rgba(141, 181, 150, 0.1);
}

.checkbox-label {
    font-size: clamp(0.8rem, 2vw, 0.9rem);
    color: var(--color-charcoal);
    font-weight: 400;
}

.terms-link {
    color: var(--color-sage-green);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.terms-link:hover {
    color: var(--color-deep-forest);
    text-decoration: underline;
}

/* ================================
   BOTÓN DE REGISTRO
================================ */
.register-btn {
    width: 100%;
    padding: clamp(0.8rem, 3vw, 1rem) clamp(1.2rem, 4vw, 1.5rem);
    background: var(--gradient-primary);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: clamp(0.9rem, 2.5vw, 1rem);
    font-weight: 600;
    font-family: var(--font-sans);
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-soft);
    letter-spacing: 0.5px;
    margin-bottom: 1.5rem;
}

.register-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.register-btn:hover {
    background: linear-gradient(135deg, var(--color-soft-brown), var(--color-sage-green));
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(141, 181, 150, 0.4);
}

.register-btn:hover::before {
    left: 100%;
}

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

.register-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

.register-btn.loading {
    pointer-events: none;
}

.register-btn.loading .btn-text {
    opacity: 0;
}

.register-btn.loading .btn-loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.btn-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

/* ================================
   FOOTER DEL REGISTRO
================================ */
.register-footer {
    text-align: center;
    border-top: 1px solid rgba(141, 181, 150, 0.1);
    padding-top: 1.5rem;
}

.login-link {
    font-size: clamp(0.9rem, 2.5vw, 1rem);
    color: var(--color-charcoal);
    margin-bottom: 1rem;
}

.login-link a {
    color: var(--color-sage-green);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.login-link a:hover {
    color: var(--color-deep-forest);
    text-decoration: underline;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-warm-gray);
    text-decoration: none;
    font-size: clamp(0.8rem, 2vw, 0.9rem);
    font-weight: 400;
    transition: var(--transition);
}

.back-link:hover {
    color: var(--color-sage-green);
}

.back-link i {
    font-size: 0.8rem;
}

/* ================================
   RESPONSIVE DESIGN
================================ */

/* Tablets (768px - 1024px) */
@media (max-width: 1024px) {
    .register-card {
        max-width: 550px;
    }
}

/* Tablets pequeñas (640px - 768px) */
@media (max-width: 768px) {
    .register-container {
        padding: 1rem;
    }
    
    .register-card {
        padding: 2rem 1.5rem;
        border-radius: 20px;
    }
    
    .brand-logo {
        flex-direction: column;
        gap: 0.8rem;
    }
}

/* Móviles (480px - 640px) */
@media (max-width: 640px) {
    .register-container {
        padding: 0.5rem;
        align-items: flex-start;
        padding-top: 2rem;
    }
    
    .register-card {
        padding: 1.5rem 1rem;
        border-radius: 16px;
    }
    
    .brand-logo {
        margin-bottom: 1rem;
    }
    
    .form-row {
        margin-bottom: 1.2rem;
    }
}

/* Móviles pequeños (360px - 480px) */
@media (max-width: 480px) {
    .register-container {
        padding: 0.5rem;
        padding-top: 1rem;
    }
    
    .register-card {
        padding: 1.2rem 0.8rem;
        margin: 0;
    }
    
    .welcome-text {
        margin-bottom: 1rem;
    }
    
    .form-row {
        gap: 1rem;
        margin-bottom: 1rem;
    }
}

/* Orientación landscape en móviles */
@media (max-height: 600px) and (orientation: landscape) {
    .register-container {
        padding: 1rem;
        align-items: flex-start;
        padding-top: 1rem;
    }
    
    .register-card {
        max-width: 800px;
        max-height: 90vh;
        overflow-y: auto;
    }
    
    .register-header {
        margin-bottom: 1rem;
    }
    
    .brand-logo {
        flex-direction: row;
        gap: 1rem;
        margin-bottom: 0.5rem;
    }
    
    .welcome-text h2 {
        font-size: 1.2rem;
    }
    
    .welcome-text p {
        font-size: 0.8rem;
    }
    
    .form-row {
        margin-bottom: 1rem;
    }
}

/* Estados de focus mejorados para accesibilidad */
.register-btn:focus,
.terms-link:focus,
.login-link a:focus,
.back-link:focus {
    outline: 2px solid var(--color-sage-green);
    outline-offset: 2px;
    border-radius: 4px;
}

.form-input:focus-visible,
.register-btn:focus-visible,
.password-toggle:focus-visible {
    outline: 2px solid var(--color-sage-green);
    outline-offset: 2px;
}

/* Animaciones suaves */
@media (prefers-reduced-motion: no-preference) {
    .register-card {
        animation: fadeInUp 0.6s ease-out;
    }
    
    @keyframes fadeInUp {
        from {
            opacity: 0;
            transform: translateY(30px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }
    
    /* Efecto de partículas flotantes */
    .register-background::after {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-image: 
            radial-gradient(2px 2px at 20px 30px, rgba(141, 181, 150, 0.3), transparent),
            radial-gradient(2px 2px at 40px 70px, rgba(166, 124, 106, 0.2), transparent),
            radial-gradient(1px 1px at 90px 20px, rgba(141, 181, 150, 0.4), transparent),
            radial-gradient(1px 1px at 130px 80px, rgba(166, 124, 106, 0.3), transparent);
        background-size: 200px 200px;
        animation: float 20s linear infinite;
    }
    
    @keyframes float {
        0% { transform: translateY(0px) translateX(0px); }
        33% { transform: translateY(-30px) translateX(10px); }
        66% { transform: translateY(30px) translateX(-10px); }
        100% { transform: translateY(0px) translateX(0px); }
    }
}

/* Modo oscuro (opcional) */
@media (prefers-color-scheme: dark) {
    :root {
        --color-charcoal: #f0f0f0;
        --color-deep-forest: #e0e0e0;
        --color-warm-gray: #b0b0b0;
        --gradient-background: linear-gradient(135deg, #2a2a2a 0%, #1f1f1f 50%, #1a1a1a 100%);
    }
    
    .register-card {
        background: rgba(40, 40, 40, 0.95);
        border: 1px solid rgba(255, 255, 255, 0.1);
    }
    
    .form-input {
        background: rgba(50, 50, 50, 0.8);
        border-color: rgba(141, 181, 150, 0.3);
        color: #f0f0f0;
    }
    
    .form-input:focus {
        background: rgba(60, 60, 60, 0.9);
    }
    
    .checkbox-custom {
        background: rgba(50, 50, 50, 0.8);
        border-color: rgba(141, 181, 150, 0.4);
    }
    
    .error-message {
        background: linear-gradient(135deg, rgba(254, 238, 238, 0.1), rgba(253, 221, 221, 0.1));
        border-color: rgba(251, 187, 187, 0.3);
        color: #fbb6b6;
    }
    
    .success-message {
        background: linear-gradient(135deg, rgba(240, 255, 244, 0.1), rgba(230, 255, 250, 0.1));
        border-color: rgba(154, 230, 180, 0.3);
        color: #9ae6b4;
    }
}

/* ================================
   MEJORAS ADICIONALES
================================ */

/* Transiciones suaves para todos los elementos interactivos */
.form-input,
.register-btn,
.checkbox-custom,
.password-toggle,
.terms-link,
.login-link a,
.back-link {
    transition: var(--transition);
}

/* Indicadores de validación */
.form-input:valid:not(:placeholder-shown) {
    border-color: var(--color-success);
}

.form-input:invalid:not(:placeholder-shown) {
    border-color: var(--color-error);
}

/* Mejoras de UX */
.form-input:hover:not(:focus):not(.error) {
    border-color: rgba(141, 181, 150, 0.4);
}

/* Efecto de enfoque para el grupo del checkbox */
.checkbox-wrapper:focus-within .checkbox-custom {
    box-shadow: var(--shadow-focus);
}

/* Mejoras para pantallas de alta densidad */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .register-card {
        border-width: 0.5px;
    }
    
    .form-input {
        border-width: 1.5px;
    }
    
    .checkbox-custom {
        border-width: 1.5px;
    }
}

/* Estados de loading mejorados */
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.fa-spinner {
    animation: spin 1s linear infinite;
}

/* Mejoras de accesibilidad adicionales */
@media (prefers-reduced-motion: reduce) {
    .logo-icon {
        animation: none;
    }
    
    .register-background::after {
        animation: none;
    }
    
    .fa-spinner {
        animation: none;
    }
}

/* Estados de hover más refinados */
.password-toggle:hover {
    background-color: var(--color-mint-fresh);
    border-radius: 50%;
}

.terms-link:hover,
.login-link a:hover {
    text-decoration-color: var(--color-sage-green);
    text-underline-offset: 3px;
}

/* Mejoras de spacing para mejor legibilidad */
.form-label {
    line-height: 1.4;
}

.checkbox-label {
    line-height: 1.5;
}

/* Estilos para mensajes de validación personalizados */
.validation-message {
    font-size: 0.8rem;
    color: var(--color-error);
    margin-top: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.validation-message.success {
    color: var(--color-success);
}

.validation-message i {
    font-size: 0.7rem;
}