@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    --primary-color: #2563eb; /* Royal Blue moderno */
    --primary-hover: #1d4ed8;
    --bg-color: #f3f4f6;
    --card-bg: #ffffff;
    --text-main: #1f2937;
    --text-secondary: #6b7280;
    --border-color: #e5e7eb;
    --input-bg: #f9fafb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --radius: 16px;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    background-image: 
        radial-gradient(at 0% 0%, hsla(253,16%,7%,0) 0, hsla(253,16%,7%,0) 50%), 
        radial-gradient(at 50% 0%, hsla(225,39%,30%,0.1) 0, hsla(225,39%,30%,0) 50%), 
        radial-gradient(at 100% 0%, hsla(339,49%,30%,0.1) 0, hsla(339,49%,30%,0) 50%);
    margin: 0;
    min-height: 100vh;
    /* Flexbox para centrar, pero con seguridad anti-recorte */
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-main);
    padding: 40px 20px;
    box-sizing: border-box;
}

/* Container Principal */
.login-container {
    background: var(--card-bg);
    padding: 48px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 440px;
    position: relative;
    border: 1px solid rgba(255,255,255,0.5);
    margin: auto; /* Margen automático vertical para centrado seguro */
}

/* ... resto del código ... */

/* Header del Formulario */
.login-header {
    text-align: center;
    margin-bottom: 40px;
    margin-top: 0; /* Asegurar margen superior 0 */
}

.login-header h2 {
    font-size: 28px;
    font-weight: 700;
    color: #111827;
    margin: 0 0 10px 0;
    letter-spacing: -0.5px;
}

.login-header p {
    color: var(--text-secondary);
    font-size: 15px;
    margin: 0;
    line-height: 1.5;
}

/* Inputs y Etiquetas */
.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #374151;
    font-size: 14px;
    font-weight: 500;
}

.input-icon-wrap {
    position: relative;
}

.input-icon-wrap i {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: #9ca3af;
    font-size: 18px;
    transition: color 0.3s ease;
}

.form-control {
    width: 100%;
    padding: 14px 16px 14px 48px; /* Espacio para el icono */
    border: 1px solid var(--border-color);
    border-radius: 10px;
    background-color: var(--input-bg);
    font-size: 15px;
    color: var(--text-main);
    box-sizing: border-box;
    transition: all 0.2s ease;
}

.form-control:focus {
    border-color: var(--primary-color);
    background-color: #fff;
    outline: none;
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}

.form-control:focus + i, 
.input-icon-wrap:focus-within i {
    color: var(--primary-color);
}

/* Botones */
.btn-submit {
    width: 100%;
    padding: 16px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px -1px rgba(37, 99, 235, 0.2);
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
}

.btn-submit:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 6px 8px -1px rgba(37, 99, 235, 0.3);
}

/* Links y Textos Secundarios */
.form-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 14px;
    margin-bottom: 30px;
}

.remember-me {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    color: var(--text-secondary);
}

.remember-me input {
    width: 16px;
    height: 16px;
    accent-color: var(--primary-color);
}

.forgot-password {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

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

.register-link {
    text-align: center;
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
    font-size: 14px;
    color: var(--text-secondary);
}

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

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

/* Alertas */
.alert {
    padding: 16px;
    border-radius: 10px;
    margin-bottom: 24px;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 12px;
    line-height: 1.4;
}

.alert-danger {
    background-color: #fef2f2;
    color: #991b1b;
    border: 1px solid #fee2e2;
}

.alert-success {
    background-color: #f0fdf4;
    color: #166534;
    border: 1px solid #dcfce7;
}

/* Responsive y Ajustes de Registro */
.login-container.register-container {
    max-width: 800px; /* Más ancho para el formulario grande */
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

@media (max-width: 640px) {
    .login-container {
        padding: 32px 24px;
        margin: 16px;
        box-shadow: none;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    body {
        background: #fff; /* Fondo blanco en móvil para evitar cortes */
        align-items: flex-start;
    }
}