/* ============================================================
   MILOX DESIGN STUDIO — BRIEFING INTELIGENTE
   brief.css · v1.0
   Línea visual: oscuro, minimalista, tipografía cuidada.
   ============================================================ */

/* ── FUENTES ──────────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Bebas+Neue&family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;1,9..40,300&family=DM+Mono:wght@400;500&display=swap');

/* ── VARIABLES ────────────────────────────────────────────── */
:root {
  --bg:           #080808;
  --surface:      #111111;
  --surface-2:    #1a1a1a;
  --surface-3:    #222222;
  --accent:       #109eff;
  --accent-dark:  #008ae6;
  --accent-glow:  rgba(16, 158, 255, 0.15);
  --text:         #f0ede8;
  --text-muted:   rgba(240, 237, 232, 0.45);
  --text-faint:   rgba(240, 237, 232, 0.18);
  --border:       rgba(240, 237, 232, 0.08);
  --border-focus: rgba(16, 158, 255, 0.5);
  --danger:       #ff5f5f;
  --success:      #34d399;

  --font-display: 'Bebas Neue', sans-serif;
  --font-body:    'DM Sans', sans-serif;
  --font-mono:    'DM Mono', monospace;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --ease:      cubic-bezier(0.4, 0, 0.2, 1);
  --transition: 0.3s var(--ease);
}

/* ── RESET ────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
::selection { background: var(--accent); color: #000; }

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  font-weight: 300;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ── BARRA SUPERIOR ───────────────────────────────────────── */
.topbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(8, 8, 8, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 0 32px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.topbar-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.topbar-logo {
  height: 26px;
  width: auto;
  object-fit: contain;
}

.topbar-name {
  font-family: var(--font-display);
  font-size: 1.5rem;
  letter-spacing: 0.05em;
  color: var(--text);
}

.topbar-badge {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  background: var(--surface-2);
  border: 1px solid var(--border);
  padding: 4px 10px;
  border-radius: 100px;
}

/* ── HERO / INTRO ─────────────────────────────────────────── */
.hero {
  padding: 120px 32px 60px;
  text-align: center;
  max-width: 680px;
  margin: 0 auto;
}

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.hero-eyebrow::before,
.hero-eyebrow::after {
  content: '';
  width: 32px;
  height: 1px;
  background: var(--accent);
  opacity: 0.5;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(3rem, 8vw, 5.5rem);
  line-height: 0.92;
  letter-spacing: 0.02em;
  color: var(--text);
  margin-bottom: 20px;
}

.hero-title span {
  color: var(--accent);
}

.hero-subtitle {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.6;
  max-width: 480px;
  margin: 0 auto;
  font-weight: 300;
}

/* ── CONTENEDOR PRINCIPAL ─────────────────────────────────── */
.form-wrapper {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 24px 80px;
}

/* ── INDICADOR DE PROGRESO ────────────────────────────────── */
.progress-bar-wrap {
  position: sticky;
  top: 60px;
  z-index: 50;
  background: var(--bg);
  padding: 16px 0 12px;
  margin-bottom: 8px;
}

.progress-steps {
  display: flex;
  align-items: center;
  gap: 0;
}

.progress-step {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
}

.step-num {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1.5px solid var(--border);
  background: var(--surface);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  transition: var(--transition);
  flex-shrink: 0;
}

.step-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-faint);
  transition: var(--transition);
  white-space: nowrap;
}

.step-connector {
  flex: 1;
  height: 1px;
  background: var(--border);
  margin: 0 8px;
  transition: background var(--transition);
}

.progress-step.active .step-num {
  border-color: var(--accent);
  background: var(--accent);
  color: #000;
}

.progress-step.active .step-label {
  color: var(--accent);
}

.progress-step.done .step-num {
  border-color: var(--success);
  background: var(--success);
  color: #000;
}

.progress-step.done .step-label {
  color: var(--success);
}

.progress-step.done + .step-connector,
.step-connector.done {
  background: var(--success);
}

/* ── TARJETAS DE SECCIÓN ──────────────────────────────────── */
.form-section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 32px;
  margin-bottom: 16px;
  display: none; /* oculto por defecto, JS lo maneja */
  animation: sectionIn 0.4s var(--ease) both;
}

.form-section.visible {
  display: block;
}

@keyframes sectionIn {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.section-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 28px;
}

.section-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--accent-glow);
  border: 1px solid rgba(16, 158, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}

.section-title {
  font-family: var(--font-display);
  font-size: 1.6rem;
  letter-spacing: 0.03em;
  color: var(--text);
  line-height: 1;
}

.section-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 300;
  margin-top: 2px;
}

/* Divisor interno */
.section-divider {
  height: 1px;
  background: var(--border);
  margin: 24px 0;
}

/* ── CAMPOS DE FORMULARIO ─────────────────────────────────── */
.field-group {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

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

.field label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.field label .required {
  color: var(--accent);
  margin-left: 3px;
}

.field input,
.field textarea,
.field select {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 300;
  padding: 12px 16px;
  outline: none;
  transition: var(--transition);
  appearance: none;
  width: 100%;
}

.field input::placeholder,
.field textarea::placeholder {
  color: var(--text-faint);
}

.field input:focus,
.field textarea:focus,
.field select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
  background: var(--surface-3);
}

.field input.error,
.field textarea.error {
  border-color: var(--danger);
  box-shadow: 0 0 0 3px rgba(255, 95, 95, 0.12);
}

.field textarea {
  resize: vertical;
  min-height: 96px;
  line-height: 1.6;
}

.field select {
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23999' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 40px;
}

.field select option {
  background: var(--surface-2);
  color: var(--text);
}

.field-hint {
  font-size: 0.75rem;
  color: var(--text-faint);
  margin-top: 2px;
  font-style: italic;
}

.field-error {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--danger);
  margin-top: 2px;
  display: none;
}

.field-error.visible {
  display: block;
}

/* ── TARJETAS DE SELECCIÓN DE SERVICIO ───────────────────── */
.service-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 4px;
}

.service-card {
  background: var(--surface-2);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  user-select: none;
}

.service-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent-glow);
  opacity: 0;
  transition: opacity var(--transition);
}

.service-card:hover {
  border-color: rgba(16, 158, 255, 0.3);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.service-card:hover::before {
  opacity: 0.5;
}

.service-card.selected {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent), 0 8px 32px rgba(16, 158, 255, 0.2);
}

.service-card.selected::before {
  opacity: 1;
}

.service-card-icon {
  font-size: 24px;
  margin-bottom: 10px;
  display: block;
}

.service-card-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  color: var(--text);
  margin-bottom: 4px;
}

.service-card-desc {
  font-size: 0.75rem;
  color: var(--text-muted);
  line-height: 1.4;
  font-weight: 300;
}

.service-card-check {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: scale(0.5);
  transition: var(--transition);
}

.service-card.selected .service-card-check {
  opacity: 1;
  transform: scale(1);
}

/* ── CHECKBOXES PERSONALIZADOS ───────────────────────────── */
.checkbox-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 4px;
}

.checkbox-item {
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  padding: 10px 14px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: var(--transition);
  user-select: none;
}

.checkbox-item:hover {
  border-color: rgba(16, 158, 255, 0.3);
  background: var(--surface-3);
}

.checkbox-item input[type="checkbox"] {
  display: none;
}

.checkbox-custom {
  width: 18px;
  height: 18px;
  border: 1.5px solid var(--border);
  border-radius: 4px;
  background: var(--surface);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.checkbox-item input:checked ~ .checkbox-custom {
  background: var(--accent);
  border-color: var(--accent);
}

.checkbox-item input:checked ~ .checkbox-custom::after {
  content: '';
  width: 4px;
  height: 8px;
  border: 2px solid #000;
  border-top: none;
  border-left: none;
  transform: rotate(45deg) translateY(-1px);
}

.checkbox-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 300;
  transition: color var(--transition);
}

.checkbox-item:has(input:checked) .checkbox-label {
  color: var(--text);
}

/* ── RADIO BUTTONS ────────────────────────────────────────── */
.radio-group {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.radio-item {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  padding: 9px 16px;
  background: var(--surface-2);
  border: 1.5px solid var(--border);
  border-radius: 100px;
  transition: var(--transition);
  user-select: none;
}

.radio-item:hover {
  border-color: rgba(16, 158, 255, 0.3);
}

.radio-item input[type="radio"] {
  display: none;
}

.radio-item.selected,
.radio-item:has(input:checked) {
  border-color: var(--accent);
  background: var(--accent-glow);
  color: var(--accent);
}

.radio-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.02em;
  color: var(--text-muted);
  transition: color var(--transition);
}

.radio-item:has(input:checked) .radio-label {
  color: var(--accent);
}

/* ── BOTONES DE NAVEGACIÓN ────────────────────────────────── */
.form-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: none;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  font-weight: 500;
  padding: 0.7rem 1.4rem;
  border-radius: 100px;
  transition: var(--transition);
  text-decoration: none;
}

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
}

.btn-ghost:hover {
  border-color: var(--border-focus);
  color: var(--text);
}

.btn-primary {
  background: var(--accent);
  color: #000;
}

.btn-primary:hover {
  background: var(--accent-dark);
  transform: translateY(-1px);
  box-shadow: 0 6px 24px rgba(16, 158, 255, 0.3);
}

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

.btn-submit {
  background: var(--accent);
  color: #000;
  padding: 0.9rem 2.4rem;
  font-size: 0.82rem;
}

.btn-submit:hover {
  background: var(--accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(16, 158, 255, 0.35);
}

.btn:disabled,
.btn.loading {
  opacity: 0.5;
  pointer-events: none;
}

.btn.loading::after {
  content: '';
  width: 14px;
  height: 14px;
  border: 2px solid rgba(0, 0, 0, 0.3);
  border-top-color: #000;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Contador de paso */
.step-counter {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-faint);
  letter-spacing: 0.05em;
}

/* ── RESUMEN FINAL (antes de enviar) ──────────────────────── */
.summary-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.summary-header {
  background: var(--surface-2);
  padding: 16px 24px;
  display: flex;
  align-items: center;
  gap: 10px;
  border-bottom: 1px solid var(--border);
}

.summary-header-title {
  font-family: var(--font-display);
  font-size: 1.4rem;
  letter-spacing: 0.04em;
  color: var(--text);
}

.summary-header-badge {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-glow);
  padding: 3px 8px;
  border-radius: 100px;
  border: 1px solid rgba(16, 158, 255, 0.25);
  margin-left: auto;
}

.summary-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.summary-row {
  display: flex;
  gap: 12px;
  align-items: baseline;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

.summary-row:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.summary-key {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  min-width: 140px;
  flex-shrink: 0;
}

.summary-val {
  font-size: 0.88rem;
  color: var(--text);
  line-height: 1.5;
  font-weight: 400;
}

.summary-val.accent {
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

/* ── PANTALLA DE ÉXITO ────────────────────────────────────── */
.success-screen {
  display: none;
  text-align: center;
  padding: 80px 32px;
  max-width: 520px;
  margin: 0 auto;
  animation: sectionIn 0.5s var(--ease) both;
}

.success-screen.visible {
  display: block;
}

.success-icon {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: rgba(52, 211, 153, 0.12);
  border: 2px solid rgba(52, 211, 153, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 28px;
  font-size: 32px;
}

.success-title {
  font-family: var(--font-display);
  font-size: 3rem;
  letter-spacing: 0.03em;
  color: var(--success);
  margin-bottom: 16px;
  line-height: 1;
}

.success-text {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 32px;
}

.success-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  text-decoration: none;
  letter-spacing: 0.05em;
  transition: gap var(--transition);
}

.success-back:hover { gap: 12px; }

/* ── MENSAJE DE ERROR GLOBAL ──────────────────────────────── */
.error-banner {
  background: rgba(255, 95, 95, 0.1);
  border: 1px solid rgba(255, 95, 95, 0.3);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  display: none;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  font-size: 0.85rem;
  color: var(--danger);
  animation: sectionIn 0.3s var(--ease);
}

.error-banner.visible {
  display: flex;
}

/* ── FOOTER ───────────────────────────────────────────────── */
.page-footer {
  text-align: center;
  padding: 40px 24px;
  border-top: 1px solid var(--border);
  margin-top: 40px;
}

.page-footer p {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.05em;
  color: var(--text-faint);
  text-transform: uppercase;
}

.page-footer a {
  color: var(--accent);
  text-decoration: none;
  transition: opacity var(--transition);
}

.page-footer a:hover { opacity: 0.7; }

/* ── RESPONSIVE ───────────────────────────────────────────── */
@media (max-width: 640px) {
  .topbar { padding: 0 16px; }
  .topbar-badge { display: none; }

  .hero { padding: 96px 20px 48px; }
  .hero-title { font-size: 3.2rem; }

  .form-wrapper { padding: 0 16px 80px; }
  .form-section { padding: 24px 18px; }

  .field-row { grid-template-columns: 1fr; gap: 14px; }
  .service-grid { grid-template-columns: 1fr; }

  .form-nav { flex-direction: column; gap: 12px; }
  .form-nav .btn { width: 100%; justify-content: center; }

  .progress-steps { gap: 0; }
  .step-label { display: none; }

  .summary-row { flex-direction: column; gap: 4px; }
  .summary-key { min-width: auto; }
}

@media (max-width: 400px) {
  .radio-group { flex-direction: column; }
}