:root {
  --bg: #0f1117;
  --surface: #1a1d27;
  --surface2: #22263a;
  --border: #2d3250;
  --accent: #7c5cfc;
  --accent-hover: #6b4de8;
  --text: #e8eaf0;
  --text-muted: #8b92b3;
  --success: #22c55e;
  --error: #ef4444;
  --warning-bg: #2d1f00;
  --warning-border: #f59e0b;
  --radius: 12px;
  --radius-sm: 8px;
}

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

body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  min-height: 100dvh;
  overflow-x: hidden;
}

.page-wrapper {
  max-width: 520px;
  margin: 0 auto;
  padding: 32px 16px 64px;
}

/* Hero */
.hero { text-align: center; margin-bottom: 28px; }
.logo { height: 48px; margin-bottom: 16px; }
.hero h1 { font-size: 1.75rem; font-weight: 700; margin-bottom: 8px; }
.subtitle { color: var(--text-muted); font-size: 0.95rem; }

.referrer-badge {
  display: inline-block;
  margin-top: 12px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 6px 16px;
  font-size: 0.875rem;
  color: var(--text-muted);
}
.referrer-badge strong { color: var(--accent); }

/* Card */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
}

.card h2 { font-size: 1.2rem; margin-bottom: 6px; }
.hint { color: var(--text-muted); font-size: 0.875rem; margin-bottom: 20px; }
.hint.small { font-size: 0.78rem; margin-top: 14px; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: background 0.15s, opacity 0.15s;
  text-decoration: none;
}
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn-primary { background: var(--accent); color: #fff; width: 100%; }
.btn-primary:hover:not(:disabled) { background: var(--accent-hover); }
.btn-secondary { background: var(--surface2); color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover:not(:disabled) { background: var(--border); }
.btn-large { padding: 14px 20px; font-size: 1rem; margin-top: 8px; }
.btn-google {
  background: #fff;
  color: #333;
  width: 100%;
  font-weight: 500;
  border: 1px solid #ddd;
}
.btn-google:hover { background: #f5f5f5; }
.btn-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 10px;
}

/* Inputs */
.input-group {
  margin-bottom: 12px;
  position: relative;
}
.input-group input {
  width: 100%;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  padding: 11px 14px;
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.15s;
}
.input-group input:focus { border-color: var(--accent); }
.phone-row { display: flex; gap: 8px; }
.phone-row input { flex: 1; }

/* Username row */
.username-row { display: flex; align-items: center; gap: 0; }
.username-row .at {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-right: none;
  border-radius: var(--radius-sm) 0 0 var(--radius-sm);
  padding: 11px 10px;
  color: var(--text-muted);
  font-size: 1rem;
}
.username-row input {
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0 !important;
  flex: 1;
}
.username-status {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.1rem;
}

/* Divider */
.divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 20px 0;
  color: var(--text-muted);
  font-size: 0.8rem;
}
.divider::before, .divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* Error */
.error-msg {
  color: var(--error);
  font-size: 0.875rem;
  margin-top: 10px;
  padding: 10px 14px;
  background: rgba(239,68,68,0.1);
  border-radius: var(--radius-sm);
  border: 1px solid rgba(239,68,68,0.3);
}

/* Loading */
.loading {
  text-align: center;
  padding: 32px 0;
}
.spinner {
  width: 40px; height: 40px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 16px;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Warning Banner */
.warning-banner {
  display: flex;
  gap: 14px;
  background: var(--warning-bg);
  border: 1px solid var(--warning-border);
  border-radius: var(--radius-sm);
  padding: 16px;
  margin-bottom: 24px;
}
.warning-icon { font-size: 1.5rem; flex-shrink: 0; }
.warning-banner p { color: var(--text-muted); font-size: 0.875rem; margin-top: 4px; }

/* Key Cards */
.key-card {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  margin-bottom: 12px;
}
.key-header { margin-bottom: 8px; }
.key-label { font-weight: 600; font-size: 0.9rem; }
.key-desc { display: block; color: var(--text-muted); font-size: 0.78rem; margin-top: 2px; }
.key-value-row { display: flex; align-items: center; gap: 8px; }
.key-value {
  font-family: 'Courier New', monospace;
  font-size: 0.78rem;
  color: #a8d8ea;
  word-break: break-all;
  flex: 1;
  background: rgba(0,0,0,0.2);
  padding: 6px 10px;
  border-radius: 6px;
}
.btn-copy {
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 8px;
  cursor: pointer;
  flex-shrink: 0;
  font-size: 1rem;
  transition: background 0.15s;
}
.btn-copy:hover { background: var(--border); }
.btn-copy.copied { border-color: var(--success); }

/* Download row */
.download-row {
  display: flex;
  justify-content: center;
  margin: 20px 0 16px;
}
.download-row .btn {
  min-width: 200px;
}

/* Confirm */
.confirm-label {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  font-size: 0.9rem;
  color: var(--text-muted);
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}
.confirm-label input { width: 18px; height: 18px; cursor: pointer; accent-color: var(--accent); }
.confirm-label:has(input:checked) { color: var(--success); border-color: var(--success); }

/* Next steps */
.next-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-top: 14px;
  max-width: 420px;
  margin-left: auto;
  margin-right: auto;
}
.next-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 6px;
  padding: 14px 10px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: var(--text);
  transition: border-color 0.15s;
}
.next-card:hover { border-color: var(--accent); }
.next-icon { font-size: 1.5rem; }
.next-card strong { font-size: 0.82rem; }
.next-card small { font-size: 0.75rem; color: var(--text-muted); }

/* Utility */
.hidden { display: none !important; }

/* ── Mobile fixes ── */
@media (max-width: 480px) {
  .page-wrapper { padding: 20px 14px 48px; }
  .hero h1 { font-size: 1.4rem; }
  .card { padding: 20px 16px; }
  .btn-row { grid-template-columns: 1fr; }
  .key-value { font-size: 0.72rem; }
  .next-grid { grid-template-columns: repeat(2, 1fr); max-width: 100%; }
}