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

body {
    font-family: var(--font-family);
    background: var(--bg-primary);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

/* ===== FONDO ESTÁTICO ===== */
body::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 50%, rgba(255, 27, 107, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(69, 202, 255, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 40% 80%, rgba(255, 77, 133, 0.1) 0%, transparent 50%);
    z-index: -1;
}

/* ===== PARTÍCULAS FLOTANTES ===== */
.particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--primary);
    border-radius: 50%;
    opacity: 0.6;
    animation: float 15s infinite linear;
}

.particle:nth-child(odd) {
    background: var(--secondary);
    animation-duration: 20s;
}

@keyframes float {
    0% {
        transform: translateY(100vh) translateX(0px);
        opacity: 0;
    }
    10% {
        opacity: 0.6;
    }
    90% {
        opacity: 0.6;
    }
    100% {
        transform: translateY(-100px) translateX(100px);
        opacity: 0;
    }
}

/* ===== CONTENEDOR PRINCIPAL ===== */
.form-container {
    background: rgba(30, 39, 73, 0.95);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-2xl);
    padding: var(--space-3xl);
    width: 100%;
    max-width: 450px;
    box-shadow: 
        var(--shadow-card),
        0 0 50px rgba(255, 27, 107, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
    position: relative;
    z-index: 10;
    transition: all var(--transition-slow);
}

.form-container:hover {
    transform: translateY(-5px);
    box-shadow: 
        var(--shadow-2xl),
        0 0 60px rgba(255, 27, 107, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

/* ===== TÍTULOS ===== */
h2 {
    color: var(--text-primary);
    font-size: var(--font-3xl);
    font-weight: var(--font-weight-bold);
    text-align: center;
    margin-bottom: var(--space-2xl);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
}

h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
}

/* ===== GRUPOS DE FORMULARIO ===== */
.form-group {
    margin-bottom: var(--space-lg);
}

/* ===== ETIQUETAS ===== */
label {
    display: block;
    color: var(--text-label);
    font-size: var(--font-sm);
    font-weight: var(--font-weight-medium);
    margin-bottom: var(--space-sm);
    transition: color var(--transition-normal);
}

/* ===== INPUTS ===== */
input[type="email"],
input[type="password"],
input[type="text"] {
    width: 100%;
    padding: var(--space-md) var(--space-lg);
    background: var(--bg-input);
    border: 2px solid var(--border-primary);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    font-size: var(--font-base);
    transition: all var(--transition-normal);
    outline: none;
    position: relative;
}

input[type="email"]:focus,
input[type="password"]:focus,
input[type="text"]:focus {
    border-color: var(--primary);
    box-shadow: 
        0 0 0 3px rgba(255, 27, 107, 0.1),
        0 0 20px rgba(255, 27, 107, 0.2);
    transform: translateY(-2px);
}

input::placeholder {
    color: var(--text-placeholder);
    transition: color var(--transition-normal);
}

input:focus::placeholder {
    color: transparent;
}

/* ===== CONTENEDOR DE CONTRASEÑA ===== */
.password-container {
    position: relative;
    display: flex;
    align-items: center;
}

.password-container input {
    padding-right: 50px;
}

.password-container button {
    position: absolute;
    right: var(--space-md);
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: var(--font-lg);
    transition: all var(--transition-normal);
    padding: var(--space-sm);
    border-radius: var(--radius-sm);
}

.password-container button:hover {
    color: var(--primary);
    background: rgba(255, 27, 107, 0.1);
    transform: scale(1.1);
}

/* ===== VALIDACIÓN DE CONTRASEÑA ===== */
#passwordValidation {
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    margin-top: var(--space-sm);
    border-left: 3px solid var(--border-primary);
    transition: all var(--transition-normal);
}

#passwordValidation p {
    color: var(--text-muted);
    font-size: var(--font-xs);
    margin: var(--space-xs) 0;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
}

#passwordValidation p.valid {
    color: var(--success);
}

#passwordValidation p.invalid {
    color: var(--error);
}

#passwordMatch {
    font-size: var(--font-xs);
    margin-top: var(--space-sm);
    padding: var(--space-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-normal);
}

#passwordMatch.match {
    color: var(--success);
    background: var(--success-bg);
}

#passwordMatch.no-match {
    color: var(--error);
    background: var(--error-bg);
}

/* ===== ENLACES ===== */
a {
    color: var(--primary);
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    transition: all var(--transition-normal);
    position: relative;
}

a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition-normal);
}

a:hover {
    color: var(--primary-light);
    transform: translateY(-1px);
}

a:hover::after {
    width: 100%;
}

/* ===== BOTONES ===== */
button[type="submit"] {
    width: 100%;
    padding: var(--space-lg) var(--space-xl);
    background: var(--gradient-button);
    border: none;
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    font-size: var(--font-lg);
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    margin: var(--space-xl) 0 var(--space-lg) 0;
    box-shadow: var(--shadow-primary);
}

button[type="submit"]::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 var(--transition-slow);
}

button[type="submit"]:hover {
    transform: translateY(-3px);
    box-shadow: 
        0 15px 30px -5px rgba(255, 27, 107, 0.4),
        0 0 30px rgba(255, 27, 107, 0.3);
    background: var(--gradient-primary-hover);
}

button[type="submit"]:hover::before {
    left: 100%;
}

button[type="submit"]:active {
    transform: translateY(-1px);
}

/* ===== TOGGLE FORM ===== */
.toggle-form {
    text-align: center;
    color: var(--text-secondary);
    font-size: var(--font-sm);
}

.toggle-form p {
    margin: 0;
}

/* ===== ESTADOS DE FORMULARIO ===== */
.form-container.fade-out {
    animation: fadeOut 0.3s ease-in forwards;
}

.form-container.fade-in {
    animation: slideIn 0.6s ease-out forwards;
}

@keyframes fadeOut {
    to {
        opacity: 0;
        transform: translateY(-20px) scale(0.95);
    }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(30px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .form-container {
        margin: var(--space-lg);
        padding: var(--space-2xl);
        max-width: 95%;
    }
    
    h2 {
        font-size: var(--font-2xl);
    }
    
    input[type="email"],
    input[type="password"],
    input[type="text"] {
        padding: var(--space-md);
    }
    
    button[type="submit"] {
        padding: var(--space-lg);
        font-size: var(--font-base);
    }
}

@media (max-width: 480px) {
    .form-container {
        padding: var(--space-xl);
    }
    
    h2 {
        font-size: var(--font-xl);
        margin-bottom: var(--space-xl);
    }
}

/* ===== ESTADOS DE ERROR Y ÉXITO ===== */
.form-group.error input {
    border-color: var(--error);
    box-shadow: 0 0 0 3px rgba(255, 107, 107, 0.1);
}

.form-group.success input {
    border-color: var(--success);
    box-shadow: 0 0 0 3px rgba(0, 212, 170, 0.1);
}

.error-message {
    color: var(--error);
    font-size: var(--font-xs);
    margin-top: var(--space-sm);
    opacity: 0;
    animation: fadeInError 0.3s ease-out forwards;
}

@keyframes fadeInError {
    to { opacity: 1; }
}

/* ===== LOADING STATE ===== */
.loading {
    position: relative;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    border: 2px solid transparent;
    border-top: 2px solid var(--text-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    transform: translate(-50%, -50%);
}

@keyframes spin {
    to { transform: translate(-50%, -50%) rotate(360deg); }
}