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

:root {
    /* Colores extraídos del logo Ethereal */
    --primary: #1b2341;        /* Azul marino oscuro */
    --primary-light: #2a3563;  /* Azul marino más claro para hover */
    --accent: #eba41c;         /* Amarillo/Naranja del sol */
    --bg: #f4f6f9;             /* Fondo gris azulado muy claro */
    --card-bg: #ffffff;
    --text: #1b2341;
    --text-light: #6b7280;
    --border: #d1d5db;
    --error: #dc2626;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    /* Fondo con gradiente sutil basado en los colores de la marca */
    background: linear-gradient(135deg, #f4f6f9 0%, #e2e8f0 100%);
    min-height: 100vh;
    color: var(--text);
    line-height: 1.5;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
}

/* ===== Contenedor ===== */
.registro-container {
    width: 100%;
    max-width: 480px;
}

.registro-card {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 36px 28px;
    box-shadow: 0 20px 40px rgba(27, 35, 65, 0.15);
    animation: fadeIn 0.4s ease;
    border-top: 5px solid var(--primary); /* Detalle superior */
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ===== Header ===== */
.registro-header {
    text-align: center;
    margin-bottom: 28px;
}

.logo-img {
    max-width: 200px; /* Tamaño del logo */
    height: auto;
    margin: 0 auto 16px;
    display: block;
}

.registro-header h1 {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.registro-header p {
    color: var(--text-light);
    font-size: 0.9rem;
}

/* ===== Formulario ===== */
.registro-form {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary);
}

.required {
    color: var(--error);
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 12px 14px;
    font-size: 0.95rem;
    border: 2px solid var(--border);
    border-radius: 8px;
    background: #fafafa;
    color: var(--text);
    transition: all 0.2s ease;
    font-family: inherit;
    outline: none;
}

.form-group input:focus,
.form-group select:focus {
    border-color: var(--accent);
    background: #fff;
    box-shadow: 0 0 0 4px rgba(235, 164, 28, 0.15); /* Brillo amarillo */
}

.form-group input.invalid,
.form-group select.invalid {
    border-color: var(--error);
    background: #fef2f2;
}

.form-group select {
    cursor: pointer;
    appearance: none;
    /* Flecha del select en color azul marino */
    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='%231b2341' stroke-width='2'%3e%3cpolyline points='6 9 12 15 18 9'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 14px center;
    background-size: 18px;
    padding-right: 44px;
}

.error-msg {
    color: var(--error);
    font-size: 0.78rem;
    min-height: 14px;
    display: block;
}

/* ===== Botón ===== */
.btn-registrar {
    width: 100%;
    padding: 14px;
    margin-top: 6px;
    border: none;
    border-radius: 8px;
    background: var(--primary); /* Fondo azul marino */
    color: #fff;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn-registrar:hover {
    background: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(27, 35, 65, 0.2);
}

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

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

/* ===== Responsive ===== */
@media (max-width: 480px) {
    .registro-card {
        padding: 28px 20px;
        border-radius: 12px;
    }

    .logo-img {
        max-width: 160px; /* Logo más pequeño en móviles */
    }

    .registro-header h1 {
        font-size: 1.25rem;
    }

    .form-group input,
    .form-group select {
        padding: 12px;
        font-size: 16px; /* evita zoom en iOS */
    }
}