:root {
  --bg-deep: #0a0f1e;
  --bg-card: rgba(15, 23, 42, 0.7);
  --bg-card-hover: rgba(20, 30, 55, 0.8);
  --border: rgba(56, 189, 248, 0.08);
  --border-active: rgba(56, 189, 248, 0.25);
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent: #38bdf8;
  --accent-glow: rgba(56, 189, 248, 0.15);
  --accent-soft: rgba(56, 189, 248, 0.08);
  --success: #34d399;
  --success-glow: rgba(52, 211, 153, 0.15);
  --warning: #fbbf24;
  --danger: #f87171;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
  --font-display: 'Outfit', sans-serif;
  --font-body: 'DM Sans', sans-serif;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

.bg-mesh {
  position: fixed;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% -20%, rgba(56, 189, 248, 0.06) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 80% 80%, rgba(99, 102, 241, 0.04) 0%, transparent 50%),
    radial-gradient(ellipse 50% 40% at 20% 90%, rgba(52, 211, 153, 0.03) 0%, transparent 50%);
}

.container {
  position: relative;
  z-index: 1;
  max-width: 480px;
  margin: 0 auto;
  padding: 40px 20px 60px;
}

.header {
  text-align: center;
  margin-bottom: 40px;
  animation: fadeDown 0.6s ease;
}

.logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 12px;
}

.logo-icon {
  color: var(--accent);
  display: flex;
}

.logo-text {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.tagline {
  font-size: 13px;
  color: var(--text-muted);
  letter-spacing: 2px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: 16px;
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow);
  transition: var(--transition);
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
  max-height: 0;
  overflow: hidden;
  padding: 0 28px;
  margin-bottom: 0;
}

.card.active {
  opacity: 1;
  transform: translateY(0);
  pointer-events: all;
  max-height: 600px;
  padding: 28px;
  margin-bottom: 16px;
  animation: slideUp 0.4s ease;
}

.card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.card-header h2 {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
}

.step-badge {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--accent-soft);
  border: 1.5px solid var(--accent);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 14px;
  flex-shrink: 0;
}

.step-badge.pulse {
  animation: badgePulse 2s infinite;
}

.step-badge.success {
  background: var(--success-glow);
  border-color: var(--success);
  color: var(--success);
}

.input-group {
  display: flex;
  gap: 10px;
}

.input-group input {
  flex: 1;
  background: rgba(15, 23, 42, 0.6);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 15px;
  outline: none;
  transition: var(--transition);
}

.input-group input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.input-group input::placeholder {
  color: var(--text-muted);
}

.hint {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 10px;
}

.btn {
  position: relative;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 14px;
  border: none;
  border-radius: var(--radius-sm);
  padding: 14px 24px;
  cursor: pointer;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, #0ea5e9, #38bdf8);
  color: #fff;
  box-shadow: 0 2px 12px rgba(56, 189, 248, 0.25);
}

.btn-primary:hover {
  box-shadow: 0 4px 20px rgba(56, 189, 248, 0.4);
  transform: translateY(-1px);
}

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

.btn-secondary {
  background: rgba(248, 113, 113, 0.1);
  color: var(--danger);
  border: 1px solid rgba(248, 113, 113, 0.2);
}

.btn-secondary:hover {
  background: rgba(248, 113, 113, 0.15);
}

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

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

.btn-full { width: 100%; }

.btn.loading .btn-text { opacity: 0; }
.btn.loading .btn-loader { display: block; }

.btn-loader {
  display: none;
  position: absolute;
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 20px;
}

.info-item {
  background: rgba(15, 23, 42, 0.5);
  border-radius: var(--radius-sm);
  padding: 14px;
  text-align: center;
}

.info-label {
  display: block;
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 6px;
}

.info-value {
  display: block;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 15px;
  color: var(--accent);
}

.number-display, .code-display {
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 20px;
  text-align: center;
  margin-bottom: 20px;
  position: relative;
}

.number-hint {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 10px;
  opacity: 0.8;
}

.number-label, .code-label {
  display: block;
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 8px;
}

.number-value {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  letter-spacing: 1px;
}

.code-value {
  font-family: var(--font-display);
  font-size: 36px;
  font-weight: 700;
  color: var(--success);
  letter-spacing: 4px;
}

.btn-copy {
  position: absolute;
  top: 12px;
  right: 12px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px;
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition);
  display: flex;
}

.btn-copy:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.timer-section {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.timer-bar {
  flex: 1;
  height: 4px;
  background: rgba(15, 23, 42, 0.6);
  border-radius: 2px;
  overflow: hidden;
}

.timer-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--success));
  border-radius: 2px;
  width: 100%;
  transition: width 1s linear;
}

.timer-text {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  min-width: 36px;
}

.waiting-indicator {
  text-align: center;
  margin-bottom: 20px;
}

.waiting-indicator p {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 12px;
}

.dot-pulse {
  display: flex;
  justify-content: center;
  gap: 6px;
}

.dot-pulse span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  animation: dotBounce 1.4s infinite ease-in-out;
}

.dot-pulse span:nth-child(2) { animation-delay: 0.16s; }
.dot-pulse span:nth-child(3) { animation-delay: 0.32s; }

.action-buttons {
  display: flex;
  gap: 10px;
}

.action-buttons .btn { flex: 1; }

.history-list {
  max-height: 360px;
  overflow-y: auto;
}

.history-item {
  background: rgba(15, 23, 42, 0.5);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px;
  margin-bottom: 8px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.history-item .hi-number {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 500;
}

.history-item .hi-code {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  color: var(--success);
  letter-spacing: 1px;
}

.history-item .hi-meta {
  font-size: 11px;
  color: var(--text-muted);
}

.history-item .hi-status {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 4px;
}

.history-item .hi-status.success { background: rgba(52,211,153,0.1); color: var(--success); }
.history-item .hi-status.cancelled { background: rgba(251,191,36,0.1); color: var(--warning); }
.history-item .hi-status.timeout { background: rgba(248,113,113,0.1); color: var(--danger); }

.toast {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 24px;
  font-size: 14px;
  color: var(--text-primary);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow);
  transition: transform 0.3s ease;
  z-index: 1000;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
}

.toast.error { border-color: rgba(248, 113, 113, 0.3); color: var(--danger); }
.toast.success { border-color: rgba(52, 211, 153, 0.3); color: var(--success); }

@keyframes fadeDown {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

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

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

@keyframes badgePulse {
  0%, 100% { box-shadow: 0 0 0 0 var(--accent-glow); }
  50% { box-shadow: 0 0 0 8px transparent; }
}

@keyframes dotBounce {
  0%, 80%, 100% { transform: scale(0.6); opacity: 0.4; }
  40% { transform: scale(1); opacity: 1; }
}

@media (max-width: 500px) {
  .container { padding: 24px 16px 40px; }
  .card { padding: 20px; border-radius: 12px; }
  .card.active { padding: 20px; }
  .info-grid { grid-template-columns: 1fr; gap: 8px; }
  .code-value { font-size: 28px; }
}