:root {
    --bg-color: #F6F3E9; /* Papel crema amarilloso */
    --card-bg: rgba(255, 255, 255, 0.85);
    --card-border: rgba(215, 205, 185, 0.9);
    --primary: #8e6c3a; /* Dorado oscuro legal / Bronce */
    --primary-hover: #73552a;
    --text-main: #2b2622; /* Tinta negra cálida / Sepia oscuro */
    --text-muted: #6b6257;
    --input-bg: rgba(255, 255, 255, 0.9);
    --input-border: #d4c8b6;
    --input-focus: rgba(142, 108, 58, 0.05);
    --error: #b83a3a;
    --success: #157a4e;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    /* Textura de papel / pergamino de alta calidad */
    background-image: url("https://www.transparenttextures.com/patterns/cream-paper.png");
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow-x: hidden;
    position: relative;
    line-height: 1.6;
}

/* Luces de fondo rebajadas para no quitar el efecto de papel */
.bg-shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    z-index: -1;
    opacity: 0.4;
}
.shape-1 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(230, 220, 195, 0.5) 0%, transparent 70%);
    top: -150px;
    left: -150px;
}
.shape-2 {
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(255, 250, 240, 0.5) 0%, transparent 70%);
    bottom: -250px;
    right: -250px;
}

.container {
    width: 100%;
    max-width: 650px;
    padding: 2rem;
    z-index: 1;
}

.glass-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 8px; /* Bordes más rectos = Mayor formalidad */
    padding: 3.5rem 3rem;
    box-shadow: 0 30px 60px -15px rgba(45, 40, 35, 0.15); /* Sombra profunda cálida */
}

/* Header tipo Papel Membretado */
header {
    text-align: center;
    margin-bottom: 2.5rem;
    border-bottom: 1px solid var(--card-border);
    padding-bottom: 1.5rem;
}

.logo {
    display: flex;
    justify-content: center;
    margin-bottom: 1.8rem;
}

.brand-logo {
    max-height: 75px; 
    width: auto;
    object-fit: contain;
    /* EL TRUCO MAGICO: Convierte forzosamente CUALQUIER logo (blanco o azul) en un negro/carbón elegante, haciéndolo 100% visible sobre el papel amarilloso */
    filter: brightness(0) opacity(0.85); 
}

.title {
    font-family: 'Cinzel', serif;
    font-size: 1.8rem;
    color: var(--text-main);
    margin-bottom: 0.5rem;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.subtitle {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 0;
}

.progress-container {
    width: 100%;
    height: 3px; /* Barra más delgada (Premium) */
    background: #e2d7c5;
    border-radius: 4px;
    margin: 1.5rem 0 0.5rem 0;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: var(--primary);
    border-radius: 4px;
    transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.step-indicator {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 2px;
    font-weight: 600;
}

/* Form Steps */
.form-step {
    display: none;
    animation: slideUp 0.5s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}
.form-step.active {
    display: block;
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(15px); }
    to { opacity: 1; transform: translateY(0); }
}

h2 {
    font-family: 'Cinzel', serif;
    font-size: 1.4rem;
    margin-bottom: 0.5rem;
    color: var(--text-main);
    font-weight: 700;
}

.section-desc {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 2.2rem;
}

/* Inputs - Diseño clásico de formulario legal */
.input-group {
    margin-bottom: 1.8rem;
}
.input-group.hidden {
    display: none;
}

.input-group label {
    display: block;
    margin-bottom: 0.6rem;
    color: var(--text-main);
    font-weight: 600;
    font-size: 0.95rem;
}

input[type="text"],
input[type="tel"],
input[type="email"],
textarea,
select {
    width: 100%;
    background: var(--input-bg);
    border: 1.5px solid var(--input-border);
    border-radius: 6px; /* Bordes suaves, no tan redondos */
    padding: 1rem 1.2rem;
    color: var(--text-main);
    font-size: 1rem;
    font-family: 'Inter', sans-serif;
    outline: none;
    transition: all 0.3s ease;
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.01);
}

textarea {
    resize: vertical;
    min-height: 120px;
    line-height: 1.5;
}

input:focus,
textarea:focus,
select:focus {
    border-color: var(--primary);
    background: var(--input-focus);
    box-shadow: 0 0 0 4px rgba(142, 108, 58, 0.15);
}

select {
    appearance: none;
    background-image: url("data:image/svg+xml;charset=US-ASCII,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22292.4%22%20height%3D%22292.4%22%3E%3Cpath%20fill%3D%22%236b6257%22%20d%3D%22M287%2069.4a17.6%2017.6%200%200%200-13-5.4H18.4c-5%200-9.3%201.8-12.9%205.4A17.6%2017.6%200%200%200%200%2082.2c0%205%201.8%209.3%205.4%2012.9l128%20127.9c3.6%203.6%207.8%205.4%2012.8%205.4s9.2-1.8%2012.8-5.4L287%2095c3.5-3.5%205.4-7.8%205.4-12.8%200-5-1.9-9.2-5.5-12.8z%22%2F%3E%3C%2Fsvg%3E");
    background-repeat: no-repeat;
    background-position: right 1.2rem top 50%;
    background-size: 0.65rem auto;
}

/* Radio Cards - Efecto Papel Presionado */
.radio-options {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}
.radio-card {
    display: block;
    cursor: pointer;
}
.radio-card input {
    display: none;
}
.radio-content {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.2rem 1rem;
    background: var(--input-bg);
    border: 1.5px solid var(--input-border);
    border-radius: 6px;
    transition: all 0.2s;
    text-align: center;
    font-weight: 500;
    color: var(--text-muted);
}
.radio-card input:checked + .radio-content {
    background: rgba(142, 108, 58, 0.05); /* Dorado muy sutil */
    border-color: var(--primary);
    color: var(--text-main);
    font-weight: 600;
}

/* Privacy Checkbox */
.privacy-box {
    background: rgba(255,255,255,0.6);
    padding: 1.5rem;
    border-radius: 6px;
    border: 1px dashed #c0b4a1;
    margin-top: 1rem;
}
.checkbox-container {
    display: flex;
    align-items: flex-start;
    cursor: pointer;
    position: relative;
    padding-left: 32px;
}
.checkbox-container input {
    position: absolute;
    opacity: 0;
    cursor: pointer;
    height: 0;
    width: 0;
}
.checkmark {
    position: absolute;
    top: 2px;
    left: 0;
    height: 20px;
    width: 20px;
    background-color: #fff;
    border: 1.5px solid var(--input-border);
    border-radius: 4px;
    transition: all 0.2s;
}
.checkbox-container input:checked ~ .checkmark {
    background-color: var(--primary);
    border-color: var(--primary);
}
.checkmark:after {
    content: "";
    position: absolute;
    display: none;
}
.checkbox-container input:checked ~ .checkmark:after {
    display: block;
}
.checkbox-container .checkmark:after {
    left: 6px;
    top: 2px;
    width: 5px;
    height: 10px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}
.privacy-text {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.6;
}
.privacy-text strong {
    color: var(--text-main);
}

/* Buttons */
.form-actions {
    display: flex;
    justify-content: space-between;
    margin-top: 2.5rem;
    gap: 1rem;
}
.form-actions.hidden {
    display: none;
}

button {
    padding: 1rem 1.5rem;
    border-radius: 6px;
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    flex: 1;
    letter-spacing: 0.5px;
}

.btn-primary {
    background: var(--text-main);
    color: #F6F3E9;
}
.btn-primary:hover {
    background: #141210;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(43, 39, 36, 0.2);
}

.btn-secondary {
    background: transparent;
    color: var(--text-main);
    border: 1.5px solid var(--input-border);
}
.btn-secondary:hover {
    background: rgba(43, 39, 36, 0.05);
}

.btn-gold {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 4px 15px rgba(142, 108, 58, 0.2);
}
.btn-gold:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(142, 108, 58, 0.3);
}

button.hidden {
    display: none;
}

/* Success Step */
.success-message {
    text-align: center;
    padding: 2.5rem 0;
}
.success-icon {
    width: 80px;
    height: 80px;
    background: rgba(21, 122, 78, 0.1);
    color: var(--success);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    margin: 0 auto 1.5rem;
    border: 2px solid var(--success);
}
.success-message h2 {
    color: var(--text-main);
    margin-bottom: 1rem;
    font-family: 'Cinzel', serif;
}
.success-desc {
    color: var(--text-muted);
    margin-top: 1rem;
    font-size: 1rem;
}

/* Responsive */
@media (max-width: 600px) {
    .glass-card {
        padding: 2.5rem 1.8rem;
    }
    .radio-options {
        grid-template-columns: 1fr;
    }
}