/* ── Reset & base ─────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
[hidden] { display: none !important; }

:root {
  --c-bg:        #080813;
  --c-surface:   #111127;
  --c-surface2:  #1a1a35;
  --c-border:    rgba(99, 102, 241, 0.2);
  --c-border-hi: rgba(99, 102, 241, 0.5);
  --c-text:      #e2e8f0;
  --c-muted:     #64748b;
  --c-subtle:    #94a3b8;
  --c-primary:   #6366f1;
  --c-primary-h: #818cf8;
  --c-purple:    #8b5cf6;
  --c-green:     #4ade80;
  --c-red:       #f87171;

  --radius-sm:   8px;
  --radius-md:   14px;
  --radius-lg:   20px;
  --radius-xl:   28px;

  --shadow-glow: 0 0 60px rgba(99, 102, 241, 0.15);
  --shadow-card: 0 24px 64px rgba(0, 0, 0, 0.5);
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--c-bg);
  color: var(--c-text);
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
}

/* ── Background orbs ─────────────────────────────────────────────────────── */
.bg-orb {
  position: fixed;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.35;
  pointer-events: none;
  z-index: 0;
}
.bg-orb--1 {
  width: 700px; height: 700px;
  background: radial-gradient(circle, #6366f1 0%, transparent 70%);
  top: -200px; left: -200px;
}
.bg-orb--2 {
  width: 600px; height: 600px;
  background: radial-gradient(circle, #8b5cf6 0%, transparent 70%);
  bottom: -150px; right: -150px;
}

/* ── Page layout ─────────────────────────────────────────────────────────── */
.page {
  position: relative;
  z-index: 1;
  max-width: 640px;
  margin: 0 auto;
  padding: 64px 20px 96px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 48px;
}

/* ── Hero ────────────────────────────────────────────────────────────────── */
.hero { text-align: center; }

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(99, 102, 241, 0.12);
  border: 1px solid var(--c-border);
  color: var(--c-primary-h);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  padding: 6px 14px;
  border-radius: 20px;
  margin-bottom: 24px;
}

.badge-dot {
  width: 7px; height: 7px;
  background: var(--c-green);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.5; transform: scale(0.8); }
}

.hero__title {
  font-size: clamp(36px, 6vw, 56px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -1.5px;
  color: var(--c-text);
  margin-bottom: 20px;
}

.gradient-text {
  background: linear-gradient(135deg, var(--c-primary) 0%, var(--c-purple) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__subtitle {
  font-size: 16px;
  color: var(--c-subtle);
  max-width: 480px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ── Card ────────────────────────────────────────────────────────────────── */
.card {
  width: 100%;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-xl);
  padding: 40px;
  box-shadow: var(--shadow-card), var(--shadow-glow);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(99,102,241,0.6), transparent);
}

.card__title {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.4px;
  margin-bottom: 8px;
}

.card__subtitle {
  font-size: 14px;
  color: var(--c-subtle);
  margin-bottom: 24px;
}

.card__step { animation: fadeIn 0.3s ease; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Form fields ─────────────────────────────────────────────────────────── */
.field { margin-bottom: 20px; }

.field__label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--c-subtle);
  margin-bottom: 8px;
  letter-spacing: 0.2px;
}

.field__input-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.field__icon {
  position: absolute;
  left: 14px;
  width: 18px; height: 18px;
  color: var(--c-muted);
  pointer-events: none;
  flex-shrink: 0;
}

.field__input {
  width: 100%;
  background: var(--c-surface2);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  color: var(--c-text);
  font-family: inherit;
  font-size: 15px;
  padding: 13px 16px 13px 44px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.field__input::placeholder { color: var(--c-muted); }

.field__input:focus {
  border-color: var(--c-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

.field--error .field__input {
  border-color: var(--c-red);
  box-shadow: 0 0 0 3px rgba(248, 113, 113, 0.12);
}

.field__error {
  display: block;
  font-size: 12px;
  color: var(--c-red);
  margin-top: 6px;
  min-height: 18px;
}

/* ── Buttons ─────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: inherit;
  font-size: 15px;
  font-weight: 700;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: opacity 0.15s, transform 0.1s, box-shadow 0.2s;
  user-select: none;
}

.btn--primary {
  width: 100%;
  padding: 15px 24px;
  margin-top: 8px;
  background: linear-gradient(135deg, var(--c-primary) 0%, var(--c-purple) 100%);
  color: #fff;
  box-shadow: 0 4px 24px rgba(99, 102, 241, 0.35);
}

.btn--primary:hover:not(:disabled) {
  opacity: 0.92;
  transform: translateY(-1px);
  box-shadow: 0 8px 32px rgba(99, 102, 241, 0.45);
}

.btn--primary:active:not(:disabled) { transform: translateY(0); }

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

.btn--ghost {
  background: transparent;
  border: 1px solid var(--c-border);
  color: var(--c-subtle);
  padding: 11px 20px;
  margin-top: 16px;
  font-size: 14px;
}

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

.btn__text  { }
.btn__spinner { display: none; animation: spin 0.8s linear infinite; }
.btn__spinner svg { width: 18px; height: 18px; }

.btn--loading .btn__text    { display: none; }
.btn--loading .btn__spinner { display: block; }

@keyframes spin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

/* ── Alert banner ─────────────────────────────────────────────────────────── */
.alert {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  font-size: 14px;
  margin-top: 16px;
}

.alert svg { width: 18px; height: 18px; flex-shrink: 0; margin-top: 1px; }

.alert--error {
  background: rgba(248, 113, 113, 0.1);
  border: 1px solid rgba(248, 113, 113, 0.3);
  color: #fca5a5;
}

/* ── Checking step ───────────────────────────────────────────────────────── */
.status-block {
  text-align: center;
  padding: 24px 0;
}

.status-spinner {
  width: 56px; height: 56px;
  background: rgba(99, 102, 241, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
}

.status-spinner svg {
  width: 28px; height: 28px;
  color: var(--c-primary);
  animation: spin 1s linear infinite;
}

.status-text {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 6px;
}

.status-subtext {
  font-size: 13px;
  color: var(--c-muted);
}

/* ── Success step ────────────────────────────────────────────────────────── */
.success-icon {
  width: 64px; height: 64px;
  background: linear-gradient(135deg, var(--c-primary), var(--c-purple));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  box-shadow: 0 8px 32px rgba(99, 102, 241, 0.4);
}

.success-icon svg {
  width: 28px; height: 28px;
  color: #fff;
}

#stepSuccess { text-align: center; }

.product-preview {
  background: var(--c-surface2);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  padding: 20px;
  margin: 24px 0 8px;
}

.product-preview__name {
  font-size: 14px;
  color: var(--c-subtle);
  margin-bottom: 10px;
  line-height: 1.4;
}

.product-preview__price {
  font-size: 28px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--c-primary), var(--c-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── Architecture section ────────────────────────────────────────────────── */
.arch {
  width: 100%;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-xl);
  padding: 36px 40px;
}

.arch__title {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--c-primary);
  margin-bottom: 24px;
}

.arch__steps {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.arch__steps li {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  font-size: 14px;
  color: var(--c-subtle);
  line-height: 1.6;
}

.arch__steps li strong { color: var(--c-text); }

.arch__num {
  flex-shrink: 0;
  width: 28px; height: 28px;
  background: rgba(99, 102, 241, 0.15);
  border: 1px solid var(--c-border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  color: var(--c-primary);
}

/* ── Responsive ──────────────────────────────────────────────────────────── */
@media (max-width: 520px) {
  .card, .arch { padding: 28px 24px; }
  .hero__title { letter-spacing: -1px; }
}