/* ==========================================
   66AI 订阅激活中心 - 全局样式
   ========================================== */

/* ---------- CSS Variables ---------- */
:root {
  /* 基础色 */
  --bg-primary: #06060f;
  --bg-secondary: #0c0c1d;
  --bg-card: rgba(255, 255, 255, 0.03);
  --bg-card-hover: rgba(255, 255, 255, 0.06);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-focus: rgba(255, 255, 255, 0.2);

  /* 文字 */
  --text-primary: #e8e8f0;
  --text-secondary: #8888a8;
  --text-muted: #55556a;

  /* 平台色 */
  --color-chatgpt: #10a37f;
  --color-chatgpt-glow: rgba(16, 163, 127, 0.3);
  --color-claude: #d97706;
  --color-claude-glow: rgba(217, 119, 6, 0.3);
  --color-grok: #6366f1;
  --color-grok-glow: rgba(99, 102, 241, 0.3);

  /* 强调 */
  --accent: #818cf8;
  --accent-glow: rgba(129, 140, 248, 0.25);
  --success: #34d399;
  --success-glow: rgba(52, 211, 153, 0.2);
  --error: #f87171;
  --error-glow: rgba(248, 113, 113, 0.2);
  --warning: #fbbf24;

  /* 渐变 */
  --gradient-primary: linear-gradient(135deg, #818cf8 0%, #6366f1 50%, #a78bfa 100%);
  --gradient-hero: linear-gradient(135deg, #818cf8 0%, #c084fc 50%, #f0abfc 100%);

  /* 间距 */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;

  /* 圆角 */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;

  /* 字体 */
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* 阴影 */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 16px 64px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 40px var(--accent-glow);

  /* 动画 */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration-fast: 150ms;
  --duration-normal: 300ms;
  --duration-slow: 500ms;
}

/* ---------- Reset & Base ---------- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

/* ---------- Background Particles ---------- */
.bg-particles {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.bg-particles::before {
  content: '';
  position: absolute;
  width: 600px;
  height: 600px;
  top: -200px;
  right: -100px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.08) 0%, transparent 70%);
  border-radius: 50%;
  animation: float 20s ease-in-out infinite;
}

.bg-particles::after {
  content: '';
  position: absolute;
  width: 500px;
  height: 500px;
  bottom: -150px;
  left: -100px;
  background: radial-gradient(circle, rgba(168, 85, 247, 0.06) 0%, transparent 70%);
  border-radius: 50%;
  animation: float 25s ease-in-out infinite reverse;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  25% { transform: translate(30px, -40px) scale(1.05); }
  50% { transform: translate(-20px, 20px) scale(0.95); }
  75% { transform: translate(40px, 30px) scale(1.02); }
}

/* ---------- Navbar ---------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-xl);
  background: rgba(6, 6, 15, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.brand-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: var(--gradient-primary);
  color: white;
}

.brand-text {
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.nav-status {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-muted);
  transition: background var(--duration-normal);
}

.status-dot.online {
  background: var(--success);
  box-shadow: 0 0 8px var(--success-glow);
  animation: pulse-dot 2s ease-in-out infinite;
}

.status-dot.error {
  background: var(--error);
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* ---------- Main Container ---------- */
.main-container {
  position: relative;
  z-index: 1;
  max-width: 560px;
  margin: 0 auto;
  padding: calc(72px + var(--space-2xl)) var(--space-md) var(--space-3xl);
}

/* ---------- Pages ---------- */
.page {
  display: none;
  animation: fadeSlideIn var(--duration-slow) var(--ease-out);
}

.page.active {
  display: block;
}

@keyframes fadeSlideIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- Hero ---------- */
.hero-section {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.hero-title {
  font-size: 2.2rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin-bottom: var(--space-sm);
}

.gradient-text {
  background: var(--gradient-hero);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1rem;
  color: var(--text-secondary);
  font-weight: 300;
}

/* ---------- Glass Card ---------- */
.glass-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  backdrop-filter: blur(12px);
  transition: all var(--duration-normal) var(--ease-out);
}

.glass-card:hover {
  background: var(--bg-card-hover);
}

.card + .card {
  margin-top: var(--space-md);
}

.card-header {
  margin-bottom: var(--space-lg);
}

.card-header h2 {
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.card-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-top: var(--space-xs);
}

/* ---------- Input Group ---------- */
.input-group {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.input-group-lg {
  margin-bottom: var(--space-md);
}

.input-icon {
  position: absolute;
  left: var(--space-md);
  color: var(--text-muted);
  display: flex;
  align-items: center;
  pointer-events: none;
  transition: color var(--duration-normal);
  z-index: 1;
}

.input-group input,
.input-group textarea {
  width: 100%;
  padding: var(--space-md) var(--space-md) var(--space-md) 48px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font);
  font-size: 1rem;
  outline: none;
  transition: all var(--duration-normal) var(--ease-out);
}

.input-group-lg input {
  padding: 18px 140px 18px 48px;
  font-size: 1.05rem;
  letter-spacing: 0.02em;
  border-radius: var(--radius-lg);
}

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

.input-group input:focus + .input-icon,
.input-group input:focus ~ .input-icon {
  color: var(--accent);
}

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

/* no icon variant */
.input-group input:only-child,
.query-panel .input-group input {
  padding-left: var(--space-md);
}

/* Platform badge inside input */
.platform-badge {
  position: absolute;
  right: var(--space-md);
  display: none;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  transition: all var(--duration-normal) var(--ease-spring);
  animation: badgePop var(--duration-normal) var(--ease-spring);
}

.platform-badge.show {
  display: flex;
}

.platform-badge.chatgpt {
  background: rgba(16, 163, 127, 0.15);
  color: var(--color-chatgpt);
  border: 1px solid rgba(16, 163, 127, 0.3);
}

.platform-badge.claude {
  background: rgba(217, 119, 6, 0.15);
  color: var(--color-claude);
  border: 1px solid rgba(217, 119, 6, 0.3);
}

.platform-badge.grok {
  background: rgba(99, 102, 241, 0.15);
  color: var(--color-grok);
  border: 1px solid rgba(99, 102, 241, 0.3);
}

@keyframes badgePop {
  from { transform: scale(0.8); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

/* ---------- Platform Detect Chips ---------- */
.platform-detect {
  margin-bottom: var(--space-lg);
}

.detect-chips {
  display: flex;
  gap: var(--space-sm);
  justify-content: center;
  flex-wrap: wrap;
}

.chip {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.78rem;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid transparent;
  transition: all var(--duration-normal) var(--ease-out);
}

.chip.active {
  color: var(--text-primary);
  border-color: var(--border-focus);
  background: rgba(255, 255, 255, 0.06);
}

.chip-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--text-muted);
  transition: all var(--duration-normal);
}

.chip.active .chip-dot.chatgpt { background: var(--color-chatgpt); box-shadow: 0 0 6px var(--color-chatgpt-glow); }
.chip.active .chip-dot.claude { background: var(--color-claude); box-shadow: 0 0 6px var(--color-claude-glow); }
.chip.active .chip-dot.grok { background: var(--color-grok); box-shadow: 0 0 6px var(--color-grok-glow); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-out);
  position: relative;
  overflow: hidden;
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-lg {
  width: 100%;
  padding: 16px;
  font-size: 1rem;
  border-radius: var(--radius-lg);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.8rem;
  flex-shrink: 0;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: var(--shadow-sm);
}

.btn-primary:not(:disabled):hover {
  box-shadow: var(--shadow-glow);
  transform: translateY(-1px);
}

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

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

.btn-outline:hover {
  border-color: var(--border-focus);
  background: rgba(255, 255, 255, 0.04);
}

/* Button loading state */
.btn.loading .btn-text {
  visibility: hidden;
}

.btn.loading .btn-loader {
  display: block;
}

.btn-loader {
  display: none;
  position: absolute;
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

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

/* ---------- Back Button ---------- */
.btn-back {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) 0;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-family: var(--font);
  font-size: 0.9rem;
  cursor: pointer;
  margin-bottom: var(--space-lg);
  transition: color var(--duration-normal);
}

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

/* ---------- Error Message ---------- */
.error-msg {
  margin-top: var(--space-md);
  padding: 0;
  font-size: 0.85rem;
  color: var(--error);
  text-align: center;
  max-height: 0;
  overflow: hidden;
  transition: all var(--duration-normal) var(--ease-out);
}

.error-msg.show {
  padding: var(--space-md);
  max-height: 200px;
  background: var(--error-glow);
  border-radius: var(--radius-md);
  border: 1px solid rgba(248, 113, 113, 0.2);
}

/* ---------- Query Section ---------- */
.query-card {
  padding: 0;
}

.query-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  cursor: pointer;
  color: var(--text-secondary);
  font-size: 0.875rem;
  transition: color var(--duration-normal);
  user-select: none;
}

.query-toggle:hover {
  color: var(--text-primary);
}

.toggle-arrow {
  margin-left: auto;
  transition: transform var(--duration-normal) var(--ease-out);
}

.query-toggle.open .toggle-arrow {
  transform: rotate(180deg);
}

.query-panel {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--duration-slow) var(--ease-out);
  padding: 0 var(--space-xl);
}

.query-panel.open {
  max-height: 500px;
  padding: 0 var(--space-xl) var(--space-xl);
}

.query-panel .input-group {
  margin-bottom: var(--space-md);
}

.query-result {
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--text-secondary);
}

.query-result .result-row {
  display: flex;
  justify-content: space-between;
  padding: 6px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.query-result .result-row:last-child {
  border-bottom: none;
}

.query-result .result-label {
  color: var(--text-muted);
}

.query-result .result-value {
  color: var(--text-primary);
  font-weight: 500;
  text-align: right;
  max-width: 60%;
  word-break: break-all;
}

/* ---------- CDK Summary ---------- */
.cdk-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.summary-platform {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.platform-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
}

.platform-icon.chatgpt {
  background: rgba(16, 163, 127, 0.15);
  color: var(--color-chatgpt);
  border: 1px solid rgba(16, 163, 127, 0.2);
}

.platform-icon.claude {
  background: rgba(217, 119, 6, 0.15);
  color: var(--color-claude);
  border: 1px solid rgba(217, 119, 6, 0.2);
}

.platform-icon.grok {
  background: rgba(99, 102, 241, 0.15);
  color: var(--color-grok);
  border: 1px solid rgba(99, 102, 241, 0.2);
}

.platform-info h3 {
  font-size: 1.05rem;
  font-weight: 600;
}

.plan-badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  background: rgba(129, 140, 248, 0.15);
  color: var(--accent);
  margin-top: 2px;
}

.summary-meta {
  display: flex;
  gap: var(--space-xl);
}

.meta-item {
  text-align: center;
}

.meta-label {
  display: block;
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 2px;
}

.meta-value {
  font-size: 1.1rem;
  font-weight: 600;
}

/* ---------- Form Styles ---------- */
.redeem-form h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

.form-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
}

.form-group {
  margin-bottom: var(--space-lg);
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: var(--space-sm);
  color: var(--text-secondary);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: var(--space-md);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font);
  font-size: 0.9rem;
  outline: none;
  transition: all var(--duration-normal) var(--ease-out);
  resize: vertical;
}

.form-group select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%238888a8' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 40px;
  cursor: pointer;
}

.form-group select option {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

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

.form-hint {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: var(--space-xs);
}

/* ---------- Stepper ---------- */
.stepper {
  display: flex;
  align-items: center;
  justify-content: center;
  margin: var(--space-xl) 0;
}

.step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
}

.step-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.05);
  border: 2px solid var(--border-color);
  color: var(--text-muted);
  transition: all var(--duration-normal) var(--ease-out);
}

.step.active .step-icon {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-glow);
}

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

.step.failed .step-icon {
  border-color: var(--error);
  color: var(--error);
  background: var(--error-glow);
}

.step.processing .step-icon {
  animation: pulse-step 1.5s ease-in-out infinite;
}

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

.step-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  transition: color var(--duration-normal);
}

.step.active .step-label,
.step.done .step-label {
  color: var(--text-secondary);
}

.step-line {
  width: 48px;
  height: 2px;
  background: var(--border-color);
  margin: 0 var(--space-sm);
  margin-bottom: 24px;
  transition: background var(--duration-normal);
}

.step-line.active {
  background: var(--accent);
}

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

/* ---------- Progress Status ---------- */
.progress-status {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.status-spinner {
  width: 16px;
  height: 16px;
  border: 2px solid var(--border-color);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* ---------- Result Card ---------- */
.result-card {
  text-align: center;
}

.result-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-md);
  font-size: 1.5rem;
}

.result-icon.success {
  background: var(--success-glow);
  color: var(--success);
  border: 2px solid rgba(52, 211, 153, 0.3);
}

.result-icon.failed {
  background: var(--error-glow);
  color: var(--error);
  border: 2px solid rgba(248, 113, 113, 0.3);
}

.result-card h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.result-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: var(--space-lg);
}

.result-details {
  text-align: left;
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  margin-bottom: var(--space-lg);
  font-size: 0.85rem;
}

.result-details .result-row {
  display: flex;
  justify-content: space-between;
  padding: 6px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.result-details .result-row:last-child {
  border-bottom: none;
}

.result-details .result-label {
  color: var(--text-muted);
}

.result-details .result-value {
  color: var(--text-primary);
  font-weight: 500;
  text-align: right;
  max-width: 60%;
  word-break: break-all;
}

/* ---------- Toast ---------- */
.toast-container {
  position: fixed;
  top: 80px;
  right: var(--space-md);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-md);
  animation: toastIn var(--duration-normal) var(--ease-spring);
  max-width: 360px;
}

.toast.removing {
  animation: toastOut var(--duration-fast) var(--ease-out) forwards;
}

.toast.success { border-color: rgba(52, 211, 153, 0.3); }
.toast.error { border-color: rgba(248, 113, 113, 0.3); }
.toast.warning { border-color: rgba(251, 191, 36, 0.3); }

@keyframes toastIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

@keyframes toastOut {
  from { transform: translateX(0); opacity: 1; }
  to { transform: translateX(100%); opacity: 0; }
}

/* ---------- Modal ---------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  padding: var(--space-md);
}

.modal-overlay.show {
  display: flex;
  animation: fadeIn var(--duration-normal) var(--ease-out);
}

.modal-card {
  max-width: 440px;
  width: 100%;
}

.modal-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.modal-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: var(--space-md);
}

.modal-details {
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--radius-sm);
  padding: var(--space-md);
  margin-bottom: var(--space-lg);
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.modal-actions {
  display: flex;
  gap: var(--space-sm);
  justify-content: flex-end;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ---------- Responsive ---------- */
@media (max-width: 640px) {
  .main-container {
    padding: calc(64px + var(--space-lg)) var(--space-md) var(--space-2xl);
  }

  .hero-title {
    font-size: 1.75rem;
  }

  .glass-card {
    padding: var(--space-lg);
  }

  .cdk-summary {
    flex-direction: column;
    align-items: flex-start;
  }

  .summary-meta {
    width: 100%;
    justify-content: space-around;
  }

  .stepper {
    transform: scale(0.9);
  }

  .toast {
    max-width: calc(100vw - 32px);
  }

  .navbar {
    padding: var(--space-sm) var(--space-md);
  }
}

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* ---------- Selection ---------- */
::selection {
  background: var(--accent-glow);
  color: var(--text-primary);
}

/* ---------- Utility: themed button per platform ---------- */
.btn-redeem.chatgpt-theme {
  background: linear-gradient(135deg, #10a37f 0%, #0d8c6c 100%);
}

.btn-redeem.claude-theme {
  background: linear-gradient(135deg, #d97706 0%, #b45309 100%);
}

.btn-redeem.grok-theme {
  background: linear-gradient(135deg, #6366f1 0%, #4f46e5 100%);
}

/* ---------- Guide Steps ---------- */
.guide-steps {
  margin-bottom: var(--space-xl);
}

.guide-step {
  display: flex;
  gap: var(--space-md);
  padding: var(--space-md) 0;
  position: relative;
}

.guide-step:not(:last-child) {
  padding-bottom: var(--space-lg);
}

/* vertical connector line */
.guide-step:not(:last-child)::after {
  content: '';
  position: absolute;
  left: 15px;
  top: calc(var(--space-md) + 32px);
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--border-focus), transparent);
}

.guide-step-num {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 700;
  background: var(--accent-glow);
  color: var(--accent);
  border: 1.5px solid rgba(129, 140, 248, 0.3);
  position: relative;
  z-index: 1;
}

.guide-step-content {
  flex: 1;
  min-width: 0;
}

.guide-step-content h4 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
  line-height: 32px; /* align with number circle */
}

.guide-step-content p {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 6px;
}

.guide-step-content code {
  background: rgba(255, 255, 255, 0.06);
  padding: 1px 6px;
  border-radius: 4px;
  font-family: 'SF Mono', Consolas, monospace;
  font-size: 0.78rem;
  color: var(--accent);
}

.guide-link {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
  padding: 4px 12px;
  border-radius: 6px;
  background: rgba(129, 140, 248, 0.1);
  border: 1px solid rgba(129, 140, 248, 0.2);
  transition: all var(--duration-normal) var(--ease-out);
  margin-top: 4px;
}

.guide-link:hover {
  background: rgba(129, 140, 248, 0.2);
  border-color: rgba(129, 140, 248, 0.4);
  transform: translateX(2px);
}

.guide-notes {
  margin: 6px 0 0 16px;
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.8;
  list-style: disc;
}

.guide-notes li {
  margin-bottom: 2px;
}