/* ============================================================
   KEPLER DS ULTRA — Registro de Dispositivo
   Aesthetic: Industrial precision / Dark tech
   ============================================================ */

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

:root {
  --cyan:       #00b8d4;
  --cyan-dim:   rgba(0, 184, 212, 0.12);
  --cyan-glow:  rgba(0, 184, 212, 0.07);
  --bg:         #f4f6f8;
  --bg2:        #ffffff;
  --bg3:        #f0f4f7;
  --border:     rgba(0, 184, 212, 0.3);
  --border2:    rgba(0, 0, 0, 0.08);
  --text:       #1a2c3d;
  --text-dim:   #4a6078;
  --text-mute:  #9ab0c4;
  --error:      #e53935;
  --success:    #00b8d4;
  --font-head:  'Orbitron', monospace;
  --font-body:  'DM Sans', sans-serif;
  --radius:     6px;
  --radius-lg:  12px;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* ── BACKGROUND ─────────────────────────────────────────── */
.bg-grid {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(0,184,212,0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,184,212,0.07) 1px, transparent 1px);
  background-size: 40px 40px;
}

.bg-glow {
  position: fixed; z-index: 0; pointer-events: none;
  width: 600px; height: 600px;
  top: -200px; right: -200px;
  background: radial-gradient(circle, rgba(0,184,212,0.08) 0%, transparent 70%);
}

/* ── HEADER ──────────────────────────────────────────────── */
header {
  position: relative; z-index: 10;
  display: flex; align-items: center; justify-content: space-between;
  padding: 24px 40px;
  border-bottom: 1px solid var(--border2);
}

.logo-wrap {
  display: flex; align-items: center; gap: 12px;
}

.logo-icon svg { display: block; }

.logo-text {
  display: flex; flex-direction: column; line-height: 1;
}

.logo-brand {
  font-family: var(--font-head);
  font-size: 18px; font-weight: 900;
  color: #1a2c3d; letter-spacing: 0.12em;
}

.logo-model {
  font-family: var(--font-head);
  font-size: 9px; font-weight: 400;
  color: var(--cyan); letter-spacing: 0.25em;
  margin-top: 3px;
}

.header-tag {
  font-family: var(--font-head);
  font-size: 9px; font-weight: 400;
  letter-spacing: 0.2em; color: var(--text-dim);
  border: 1px solid var(--border);
  padding: 5px 12px; border-radius: 3px;
}

/* ── MAIN ────────────────────────────────────────────────── */
main {
  position: relative; z-index: 5;
  max-width: 780px; margin: 0 auto;
  padding: 60px 24px 80px;
}

/* ── HERO ────────────────────────────────────────────────── */
.hero { margin-bottom: 48px; }

.hero h1 {
  font-family: var(--font-head);
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 900; line-height: 1.1;
  color: #1a2c3d; letter-spacing: 0.04em;
  margin-bottom: 16px;
}

.hero h1 .accent { color: var(--cyan); }

.subtitle {
  font-size: 15px; color: var(--text-dim);
  max-width: 480px; line-height: 1.7;
}

/* ── FORM CARD ───────────────────────────────────────────── */
.form-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 0 40px rgba(0,184,212,0.08), 0 8px 40px rgba(0,0,0,0.08);
}

.form-card::before {
  content: '';
  display: block; height: 2px;
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
}

.form-card-inner { padding: 40px; }

/* ── STEPS INDICATOR ─────────────────────────────────────── */
.steps {
  display: flex; align-items: center; gap: 0;
  margin-bottom: 40px;
}

.step {
  display: flex; flex-direction: column; align-items: center; gap: 4px;
  flex-shrink: 0;
}

.step span {
  width: 32px; height: 32px;
  border-radius: 50%;
  border: 1px solid var(--text-mute);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-head); font-size: 11px; font-weight: 700;
  color: var(--text-mute);
  transition: all 0.3s ease;
}

.step small {
  font-size: 10px; letter-spacing: 0.1em;
  color: var(--text-mute);
  font-family: var(--font-head); font-weight: 400;
  transition: color 0.3s;
}

.step.active span {
  border-color: var(--cyan); color: var(--cyan);
  background: var(--cyan-glow);
  box-shadow: 0 0 12px rgba(0,229,255,0.3);
}

.step.active small { color: var(--cyan); }

.step.done span {
  background: var(--cyan); color: var(--bg); border-color: var(--cyan);
}

.step.done small { color: var(--text-dim); }

.step-line {
  flex: 1; height: 1px;
  background: var(--text-mute);
  margin: 0 8px; margin-bottom: 16px;
  transition: background 0.3s;
}

.step-line.done { background: var(--cyan); }

/* ── FORM STEPS ──────────────────────────────────────────── */
.form-step {
  display: none;
  animation: fadeUp 0.3s ease;
}

.form-step.active { display: block; }

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

.step-title {
  font-family: var(--font-head);
  font-size: 16px; font-weight: 700;
  color: #1a2c3d; letter-spacing: 0.06em;
  margin-bottom: 8px;
}

.step-desc {
  font-size: 13px; color: var(--text-dim);
  margin-bottom: 28px; line-height: 1.6;
}

/* ── FIELDS ──────────────────────────────────────────────── */
.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 20px; }

.field label {
  font-size: 11px; font-weight: 500;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--text-dim);
}

.req { color: var(--cyan); }

.field input, .field select {
  width: 100%;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px;
  color: var(--text);
  font-family: var(--font-body); font-size: 14px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
  appearance: none;
}

.field input::placeholder { color: var(--text-mute); }

.field input:focus, .field select:focus {
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(0,229,255,0.1);
}

.field input.invalid { border-color: var(--error); }

.field-hint {
  font-size: 11px; color: var(--text-mute);
}

.field-hint code {
  font-family: monospace; color: var(--cyan);
  background: var(--cyan-glow); padding: 1px 5px; border-radius: 3px;
}

.field-error {
  font-size: 11px; color: var(--error);
  min-height: 14px; display: block;
}

/* ID input with prefix */
.id-input-wrap {
  display: flex; align-items: stretch;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.id-input-wrap:focus-within {
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(0,229,255,0.1);
}

.input-prefix {
  background: rgba(0,229,255,0.06);
  border-right: 1px solid var(--border);
  padding: 12px 14px;
  font-family: monospace; font-size: 13px;
  color: var(--cyan); white-space: nowrap;
  display: flex; align-items: center;
}

.id-input-wrap input {
  border: none !important;
  box-shadow: none !important;
  border-radius: 0;
  flex: 1;
  text-transform: uppercase;
  font-family: monospace; font-size: 15px; letter-spacing: 0.1em;
  color: #1a2c3d;
}

/* Select */
.select-wrap { position: relative; }

.select-wrap select { padding-right: 36px; cursor: pointer; }

.select-arrow {
  position: absolute; right: 12px; top: 50%;
  transform: translateY(-50%);
  pointer-events: none; color: var(--text-dim);
}

/* Field rows */
.field-row {
  display: grid; grid-template-columns: 1fr 1fr; gap: 16px;
}

@media (max-width: 560px) {
  .field-row { grid-template-columns: 1fr; }
}

/* Checkbox */
.checkbox-field { margin-bottom: 24px; }

.checkbox-label {
  display: flex; align-items: flex-start; gap: 12px; cursor: pointer;
  font-size: 13px; color: var(--text-dim); line-height: 1.5;
}

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

.checkbox-custom {
  width: 18px; height: 18px; flex-shrink: 0;
  border: 1px solid var(--border);
  border-radius: 3px;
  background: var(--bg3);
  display: flex; align-items: center; justify-content: center;
  margin-top: 2px;
  transition: all 0.2s;
}

.checkbox-label input:checked + .checkbox-custom {
  background: var(--cyan); border-color: var(--cyan);
}

.checkbox-label input:checked + .checkbox-custom::after {
  content: '';
  width: 10px; height: 6px;
  border-left: 2px solid var(--bg);
  border-bottom: 2px solid var(--bg);
  transform: rotate(-45deg) translateY(-1px);
  display: block;
}

.checkbox-label a { color: var(--cyan); text-decoration: none; }
.checkbox-label a:hover { text-decoration: underline; }

.terms-field { margin-top: 8px; }

/* ── SUMMARY ─────────────────────────────────────────────── */
.summary {
  background: var(--bg3);
  border: 1px solid var(--border2);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 24px;
  display: grid; gap: 10px;
}

.summary-row {
  display: flex; gap: 12px;
  font-size: 13px; align-items: baseline;
}

.summary-label {
  font-size: 10px; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--text-mute); white-space: nowrap; min-width: 120px;
}

.summary-value { color: var(--text); }

.summary-id {
  font-family: monospace; color: var(--cyan);
  font-size: 15px; letter-spacing: 0.1em;
}

/* ── BUTTONS ─────────────────────────────────────────────── */
.btn-row {
  display: flex; gap: 12px; justify-content: flex-end; align-items: center;
  margin-top: 8px;
}

.btn-next, .btn-submit {
  display: flex; align-items: center; gap: 8px;
  background: var(--cyan); color: var(--bg);
  border: none; border-radius: var(--radius);
  padding: 12px 24px;
  font-family: var(--font-head); font-size: 11px; font-weight: 700;
  letter-spacing: 0.1em; text-transform: uppercase;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-next:hover, .btn-submit:hover {
  background: #0097a7;; box-shadow: 0 0 20px rgba(0,229,255,0.4);
}

.btn-next:active, .btn-submit:active { transform: scale(0.98); }

.btn-back {
  display: flex; align-items: center; gap: 6px;
  background: transparent; color: var(--text-dim);
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 12px 18px;
  font-family: var(--font-head); font-size: 10px; font-weight: 400;
  letter-spacing: 0.1em; text-transform: uppercase;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-back:hover { color: var(--text); border-color: var(--text-dim); }

.btn-submit { min-width: 160px; justify-content: center; position: relative; }

.btn-submit:disabled {
  opacity: 0.6; cursor: not-allowed;
}

.btn-spinner {
  display: none; width: 16px; height: 16px;
  border: 2px solid rgba(7,11,16,0.3);
  border-top-color: var(--bg);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

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

/* ── SUCCESS / ERROR ─────────────────────────────────────── */
.success-screen, .error-screen {
  display: none;
  text-align: center; padding: 20px 0;
  animation: fadeUp 0.4s ease;
}

.success-icon {
  margin-bottom: 20px;
  animation: iconPop 0.5s cubic-bezier(0.34,1.56,0.64,1);
}

@keyframes iconPop {
  from { transform: scale(0.5); opacity: 0; }
  to   { transform: scale(1); opacity: 1; }
}

.success-screen h2 {
  font-family: var(--font-head); font-size: 22px;
  color: #1a2c3d; letter-spacing: 0.06em; margin-bottom: 12px;
}

.success-screen p { color: var(--text-dim); font-size: 14px; }

.success-id {
  font-family: monospace; font-size: 20px;
  color: var(--cyan); letter-spacing: 0.15em;
  background: var(--cyan-glow);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 24px; margin: 16px auto;
  display: inline-block;
}

.success-sub {
  font-size: 12px; color: var(--text-mute);
  max-width: 400px; margin: 12px auto 0; line-height: 1.6;
}

.error-screen h2 {
  font-family: var(--font-head); font-size: 20px;
  color: var(--error); margin-bottom: 12px;
}

.error-icon { font-size: 40px; margin-bottom: 16px; color: var(--error); }

.error-screen p { color: var(--text-dim); font-size: 14px; margin-bottom: 24px; }

/* ── FOOTER ──────────────────────────────────────────────── */
footer {
  position: relative; z-index: 5;
  text-align: center; padding: 24px;
  border-top: 1px solid var(--border2);
  font-size: 11px; color: var(--text-mute);
  letter-spacing: 0.08em;
}

/* ── MOBILE ──────────────────────────────────────────────── */
@media (max-width: 600px) {
  header { padding: 16px 20px; }
  .header-tag { display: none; }
  main { padding: 40px 16px 60px; }
  .form-card-inner { padding: 24px 20px; }
  .hero h1 { font-size: 28px; }
  .btn-row { flex-direction: column-reverse; }
  .btn-next, .btn-submit, .btn-back { width: 100%; justify-content: center; }
}

/* ── SELECTOR DE EQUIPO ──────────────────────────────────── */
.selector-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 8px;
}
@media (max-width: 560px) { .selector-grid { grid-template-columns: 1fr; } }

.selector-btn {
  display: flex; flex-direction: column; gap: 6px; align-items: center;
  text-align: center; text-decoration: none;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 20px;
  transition: border-color .2s, box-shadow .2s, transform .1s;
}
.selector-btn:hover {
  border-color: var(--cyan);
  box-shadow: 0 0 20px rgba(0,229,255,.15);
}
.selector-btn:active { transform: scale(0.99); }

.sel-model {
  font-family: var(--font-head); font-weight: 900; font-size: 18px;
  color: #1a2c3d; letter-spacing: 0.08em;
}
.sel-sub { font-size: 12px; color: var(--text-dim); letter-spacing: 0.06em; }