/* ===================================================================
   精灵学院 Rhythm Game Studio Theme - style.css
   Palette: Pale Blush (#FDF0F3), Deep Plum (#1A0D1C), Lavender (#BCA0DC), Peach (#FF9E90)
   Features: Beat-grid lines, soft rectangular panels, system Chinese typography,
             responsive mobile-first layout, prefers-reduced-motion, accessible focus
   =================================================================== */

:root {
  /* Rhythm Studio Color Palette */
  --bg-deep-plum: #180B1A;
  --bg-deep-plum-alt: #221025;
  --bg-panel: #2A142E;
  --bg-panel-elevated: #361A3B;
  --bg-panel-hover: #412047;
  
  --text-pale-blush: #FDF0F3;
  --text-pale-muted: #D9C3CC;
  --text-dim: #9C8391;
  
  --accent-lavender: #BCA0DC;
  --accent-lavender-light: #E4D7F5;
  --accent-lavender-dim: rgba(188, 160, 220, 0.18);
  
  --accent-peach: #FF9E90;
  --accent-peach-light: #FFD4CD;
  --accent-peach-glow: rgba(255, 158, 144, 0.28);
  
  --border-beat-grid: rgba(188, 160, 220, 0.14);
  --border-beat-grid-active: rgba(255, 158, 144, 0.35);
  
  --color-success: #6EE7B7;
  --color-warning: #FCD34D;
  --color-info: #93C5FD;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Cascadia Code", "Consolas", monospace;

  /* Spacing & Layout */
  --container-max: 1200px;
  --container-narrow: 840px;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-pill: 9999px;
  
  --transition-normal: 0.24s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-bounce: 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-deep-plum);
  color: var(--text-pale-blush);
  line-height: 1.68;
  overflow-x: hidden;
  position: relative;
  /* Thin beat-grid studio texture */
  background-image: 
    linear-gradient(to right, var(--border-beat-grid) 1px, transparent 1px),
    linear-gradient(to bottom, var(--border-beat-grid) 1px, transparent 1px);
  background-size: 40px 40px;
  background-position: center top;
}

/* Subtle Beat Grid Track Glow Overlay */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 50% 12%, rgba(188, 160, 220, 0.08) 0%, rgba(24, 11, 26, 0.95) 70%);
  pointer-events: none;
  z-index: -1;
}

img, svg {
  display: block;
  max-width: 100%;
}

a {
  color: var(--accent-lavender);
  text-decoration: none;
  transition: color var(--transition-normal);
}

a:hover {
  color: var(--accent-peach);
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

:focus-visible {
  outline: 2px solid var(--accent-peach);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* Skip Link for Accessibility */
.skip-link {
  position: absolute;
  top: -60px;
  left: 1rem;
  background: var(--accent-peach);
  color: var(--bg-deep-plum);
  padding: 0.75rem 1.25rem;
  font-weight: 700;
  z-index: 9999;
  border-radius: var(--radius-sm);
  transition: top var(--transition-normal);
}

.skip-link:focus {
  top: 1rem;
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

.container-narrow {
  max-width: var(--container-narrow);
}

/* Header & Rhythm Studio Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(24, 11, 26, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-beat-grid);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

/* Brand Logo */
.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: -0.02em;
  color: var(--text-pale-blush);
}

.logo-beat-icon {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--accent-lavender), var(--accent-peach));
  border-radius: var(--radius-sm);
  color: var(--bg-deep-plum);
  box-shadow: 0 0 16px var(--accent-peach-glow);
}

.logo-beat-icon svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

.brand-tag {
  font-size: 0.75rem;
  padding: 2px 7px;
  background: var(--accent-lavender-dim);
  color: var(--accent-lavender-light);
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-weight: 600;
}

/* Navigation Links */
.site-nav {
  display: none;
}

@media (min-width: 1024px) {
  .site-nav {
    display: flex;
    align-items: center;
    gap: 1.25rem;
  }
}

.nav-link {
  font-size: 0.92rem;
  color: var(--text-pale-muted);
  font-weight: 500;
  position: relative;
  padding: 0.35rem 0.2rem;
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-pale-blush);
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--accent-peach);
  transition: width var(--transition-normal);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.header-cta-group {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

/* Mobile Menu Toggle Button */
.mobile-menu-btn {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  background: var(--bg-panel);
  border: 1px solid var(--border-beat-grid);
  color: var(--text-pale-blush);
}

@media (min-width: 1024px) {
  .mobile-menu-btn {
    display: none;
  }
}

.mobile-menu-btn span {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--text-pale-blush);
  margin: 2.5px 0;
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

.mobile-menu-btn[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.mobile-menu-btn[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-btn[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Navigation Drawer */
.mobile-drawer {
  display: none;
  background: var(--bg-deep-plum-alt);
  border-bottom: 1px solid var(--border-beat-grid);
  padding: 1.25rem;
}

.mobile-drawer.is-open {
  display: block;
}

.mobile-drawer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.mobile-drawer-links a {
  display: block;
  padding: 0.65rem 0.85rem;
  border-radius: var(--radius-sm);
  color: var(--text-pale-blush);
  font-size: 1rem;
  background: var(--bg-panel);
  border: 1px solid var(--border-beat-grid);
}

.mobile-drawer-links a:hover {
  border-color: var(--accent-peach);
  color: var(--accent-peach-light);
}

.mobile-drawer-cta {
  margin-top: 1rem;
}

/* Button Component Styles */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.65rem 1.35rem;
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
  text-align: center;
  white-space: nowrap;
}

.btn-sm {
  font-size: 0.85rem;
  padding: 0.45rem 0.95rem;
  border-radius: var(--radius-sm);
}

.btn-lg {
  font-size: 1.05rem;
  padding: 0.85rem 1.85rem;
  border-radius: var(--radius-md);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-peach), #FF8577);
  color: #230B1D;
  box-shadow: 0 4px 18px var(--accent-peach-glow);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #FFB0A4, #FF9E90);
  color: #1A0515;
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(255, 158, 144, 0.45);
}

.btn-secondary {
  background: var(--bg-panel-elevated);
  color: var(--text-pale-blush);
  border: 1px solid var(--accent-lavender-dim);
}

.btn-secondary:hover {
  background: var(--bg-panel-hover);
  border-color: var(--accent-lavender);
  color: #FFFFFF;
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--accent-lavender-light);
  border: 1px solid var(--accent-lavender);
}

.btn-outline:hover {
  background: var(--accent-lavender-dim);
  color: var(--text-pale-blush);
}

/* Beat Badge */
.bpm-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-pill);
  background: rgba(42, 20, 46, 0.85);
  border: 1px solid var(--border-beat-grid-active);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-peach-light);
  margin-bottom: 1.25rem;
}

.bpm-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-peach);
  box-shadow: 0 0 8px var(--accent-peach);
}

/* Hero Section */
.hero-section {
  padding: 3.5rem 0 2.5rem;
  text-align: center;
  position: relative;
}

.hero-title {
  font-size: clamp(2rem, 5.5vw, 3.75rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 1.2rem;
  color: var(--text-pale-blush);
}

.hero-title .gradient-text {
  background: linear-gradient(135deg, var(--text-pale-blush) 20%, var(--accent-lavender) 60%, var(--accent-peach) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-pale-muted);
  max-width: 720px;
  margin: 0 auto 2rem;
  line-height: 1.7;
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

/* Sequencer Graphic (SVG/CSS Rhythm Track) */
.sequencer-card {
  background: var(--bg-panel);
  border: 1px solid var(--border-beat-grid);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  max-width: 980px;
  margin: 0 auto;
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.4);
  position: relative;
  overflow: hidden;
}

.sequencer-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  border-bottom: 1px solid var(--border-beat-grid);
  padding-bottom: 0.85rem;
  margin-bottom: 1.2rem;
  font-size: 0.85rem;
  font-family: var(--font-mono);
  color: var(--accent-lavender);
}

.track-indicators {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

.track-pill {
  padding: 2px 8px;
  background: var(--bg-deep-plum);
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-beat-grid);
}

/* Sequencer Grid Visual */
.sequencer-grid-visual {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 0.5rem;
}

.sequencer-lane {
  display: grid;
  grid-template-columns: 75px repeat(8, 1fr);
  align-items: center;
  gap: 0.45rem;
  min-width: 460px;
}

.lane-label {
  font-size: 0.78rem;
  font-family: var(--font-mono);
  color: var(--text-dim);
  text-align: left;
}

.lane-cell {
  height: 28px;
  border-radius: var(--radius-sm);
  background: var(--bg-deep-plum);
  border: 1px solid var(--border-beat-grid);
  transition: all var(--transition-normal);
  position: relative;
}

.lane-cell.hit-active {
  background: linear-gradient(135deg, var(--accent-lavender), var(--accent-peach));
  border-color: var(--accent-peach-light);
  box-shadow: 0 0 10px var(--accent-peach-glow);
}

.lane-cell.hit-subtle {
  background: var(--accent-lavender-dim);
  border-color: var(--accent-lavender);
}

/* Editorial Section Heading */
.section-wrapper {
  padding: 4.5rem 0;
  position: relative;
}

.section-wrapper.alt-bg {
  background: var(--bg-deep-plum-alt);
  border-top: 1px solid var(--border-beat-grid);
  border-bottom: 1px solid var(--border-beat-grid);
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 3rem;
}

.section-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  color: var(--accent-lavender);
  margin-bottom: 0.5rem;
  letter-spacing: 0.08em;
}

.section-title {
  font-size: clamp(1.6rem, 3.5vw, 2.35rem);
  font-weight: 700;
  color: var(--text-pale-blush);
  margin-bottom: 0.8rem;
  letter-spacing: -0.02em;
}

.section-desc {
  font-size: 1rem;
  color: var(--text-pale-muted);
}

/* Illustrated Advantages Cards */
.advantages-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .advantages-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.advantage-card {
  background: var(--bg-panel);
  border: 1px solid var(--border-beat-grid);
  border-radius: var(--radius-lg);
  padding: 2rem 1.6rem;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  position: relative;
}

.advantage-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-beat-grid-active);
  background: var(--bg-panel-elevated);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.35);
}

.card-beat-meter {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

.card-icon-box {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--accent-lavender-dim);
  border: 1px solid var(--accent-lavender);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-peach-light);
}

.meter-num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-lavender);
  padding: 2px 8px;
  background: var(--bg-deep-plum);
  border-radius: var(--radius-pill);
}

.advantage-card h3 {
  font-size: 1.25rem;
  color: var(--text-pale-blush);
  margin-bottom: 0.75rem;
}

.advantage-card p {
  font-size: 0.95rem;
  color: var(--text-pale-muted);
  line-height: 1.65;
}

/* Full-width Network Route Strip */
.route-strip-container {
  background: var(--bg-panel);
  border-top: 1px solid var(--border-beat-grid);
  border-bottom: 1px solid var(--border-beat-grid);
  padding: 2.5rem 0;
  overflow: hidden;
}

.nodes-scroll-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

@media (min-width: 640px) {
  .nodes-scroll-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1024px) {
  .nodes-scroll-grid {
    grid-template-columns: repeat(6, 1fr);
  }
}

.node-chip {
  background: var(--bg-deep-plum);
  border: 1px solid var(--border-beat-grid);
  border-radius: var(--radius-md);
  padding: 1rem;
  transition: all var(--transition-normal);
  text-align: center;
}

.node-chip:hover {
  border-color: var(--accent-peach);
  background: var(--bg-panel-elevated);
}

.node-flag {
  font-size: 1.75rem;
  margin-bottom: 0.35rem;
}

.node-name {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-pale-blush);
}

.node-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-lavender);
  margin-top: 0.25rem;
}

.node-notice {
  margin-top: 1.5rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-dim);
}

/* Split AI & Streaming Explanations */
.split-features {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

@media (min-width: 900px) {
  .split-features {
    grid-template-columns: 1fr 1fr;
  }
}

.split-card {
  background: var(--bg-panel);
  border: 1px solid var(--border-beat-grid);
  border-radius: var(--radius-lg);
  padding: 2.25rem 1.85rem;
  display: flex;
  flex-direction: column;
}

.split-card-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.split-badge {
  padding: 4px 10px;
  background: var(--accent-lavender-dim);
  color: var(--accent-lavender-light);
  border-radius: var(--radius-pill);
  font-size: 0.75rem;
  font-family: var(--font-mono);
  font-weight: 600;
}

.split-badge.peach {
  background: var(--accent-peach-glow);
  color: var(--accent-peach-light);
}

.split-card h3 {
  font-size: 1.45rem;
  color: var(--text-pale-blush);
}

.split-card p {
  color: var(--text-pale-muted);
  font-size: 0.96rem;
  margin-bottom: 1.5rem;
}

.app-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.app-pill {
  font-size: 0.82rem;
  padding: 0.35rem 0.75rem;
  background: var(--bg-deep-plum);
  border: 1px solid var(--border-beat-grid);
  border-radius: var(--radius-pill);
  color: var(--text-pale-blush);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.app-pill-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-success);
}

.compliance-note {
  font-size: 0.82rem;
  color: var(--text-dim);
  border-top: 1px dashed var(--border-beat-grid);
  padding-top: 1rem;
  margin-top: auto;
}

/* Pricing Comparison Table & Cards */
.pricing-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 640px) {
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1080px) {
  .pricing-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.pricing-card {
  background: var(--bg-panel);
  border: 1px solid var(--border-beat-grid);
  border-radius: var(--radius-lg);
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all var(--transition-normal);
}

.pricing-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-lavender);
}

/* Distinct Suitable Option (Recommended) */
.pricing-card.is-featured {
  background: var(--bg-panel-elevated);
  border: 2px solid var(--accent-peach);
  box-shadow: 0 12px 32px var(--accent-peach-glow);
}

.featured-ribbon {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--accent-peach), #FF8577);
  color: #1F0816;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 3px 14px;
  border-radius: var(--radius-pill);
  white-space: nowrap;
}

.pricing-plan-name {
  font-size: 1.25rem;
  color: var(--text-pale-blush);
  margin-bottom: 0.5rem;
}

.pricing-plan-desc {
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-bottom: 1.25rem;
  min-height: 40px;
}

.pricing-price-box {
  margin-bottom: 1.5rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--border-beat-grid);
}

.pricing-price-val {
  font-size: 2.1rem;
  font-weight: 800;
  color: var(--text-pale-blush);
  font-family: var(--font-mono);
  display: flex;
  align-items: baseline;
  gap: 0.35rem;
}

.pricing-unit {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-dim);
  font-family: var(--font-sans);
}

.pricing-sub-val {
  font-size: 0.84rem;
  color: var(--accent-peach-light);
  font-family: var(--font-mono);
  margin-top: 0.35rem;
}

.pricing-quota-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.82rem;
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--accent-lavender-light);
  background: var(--bg-deep-plum);
  border: 1px solid var(--border-beat-grid);
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  margin-top: 0.55rem;
}

.pricing-notice-badge {
  display: inline-block;
  font-size: 0.75rem;
  color: var(--accent-lavender-light);
  background: var(--accent-lavender-dim);
  padding: 2px 7px;
  border-radius: var(--radius-sm);
  margin-top: 0.45rem;
}

/* Comprehensive Pricing Cycles Table */
.pricing-cycle-strip {
  margin-top: 2.5rem;
  background: var(--bg-panel);
  border: 1px solid var(--border-beat-grid);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  overflow-x: auto;
}

.pricing-cycle-strip h4 {
  font-size: 1.1rem;
  color: var(--text-pale-blush);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.pricing-cycle-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 600px;
  font-size: 0.92rem;
}

.pricing-cycle-table th {
  text-align: left;
  padding: 0.75rem 1rem;
  color: var(--accent-lavender);
  border-bottom: 1px solid var(--border-beat-grid);
  font-family: var(--font-mono);
}

.pricing-cycle-table td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border-beat-grid);
  color: var(--text-pale-muted);
}

.pricing-cycle-table tr:last-child td {
  border-bottom: none;
}

.pricing-cycle-table .price-hl {
  color: var(--accent-peach);
  font-weight: 700;
  font-family: var(--font-mono);
}

.pricing-features-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 2rem;
  flex-grow: 1;
}

.pricing-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  font-size: 0.88rem;
  color: var(--text-pale-muted);
}

.pricing-feature-item svg {
  width: 16px;
  height: 16px;
  fill: var(--color-success);
  flex-shrink: 0;
  margin-top: 3px;
}

.pricing-footer-disclaimer {
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-top: 2rem;
}

/* Optional Interactive Rhythm Game Demo Section */
.beat-game-section {
  background: var(--bg-panel);
  border: 1px solid var(--border-beat-grid);
  border-radius: var(--radius-lg);
  padding: 2.25rem 1.5rem;
  max-width: 860px;
  margin: 0 auto;
}

.game-control-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  background: var(--bg-deep-plum);
  padding: 0.85rem 1.25rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-beat-grid);
  margin-bottom: 1.5rem;
}

.game-status-info {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
}

.game-status-val {
  color: var(--accent-peach);
  font-weight: 700;
}

.game-action-btns {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.beat-prompt-display {
  text-align: center;
  padding: 1.2rem;
  background: var(--bg-deep-plum-alt);
  border-radius: var(--radius-md);
  border: 1px dashed var(--border-beat-grid);
  margin-bottom: 1.75rem;
}

.prompt-sequence {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  letter-spacing: 0.2em;
  color: var(--accent-lavender-light);
  margin-top: 0.35rem;
  font-weight: 700;
}

/* Four Large Beat Pads */
.beat-pads-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-bottom: 1.5rem;
}

@media (min-width: 600px) {
  .beat-pads-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.beat-pad {
  min-height: 120px;
  background: var(--bg-panel-elevated);
  border: 2px solid var(--border-beat-grid);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  color: var(--text-pale-blush);
  user-select: none;
  -webkit-user-select: none;
  touch-action: manipulation;
  transition: transform 0.08s ease, background-color 0.15s ease, border-color 0.15s ease;
}

.beat-pad:hover {
  background: var(--bg-panel-hover);
  border-color: var(--accent-lavender);
}

.beat-pad:active,
.beat-pad.is-pressed {
  transform: scale(0.96);
  background: var(--accent-lavender-dim);
  border-color: var(--accent-peach);
}

.pad-num {
  font-size: 1.75rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--accent-peach);
}

.pad-key {
  font-size: 0.78rem;
  font-family: var(--font-mono);
  color: var(--text-dim);
  background: var(--bg-deep-plum);
  padding: 1px 6px;
  border-radius: var(--radius-sm);
}

.beat-game-disclaimer {
  font-size: 0.8rem;
  color: var(--text-dim);
  text-align: center;
  line-height: 1.5;
}

/* Article Grid Section (3x3 Desktop / 2-col Tablet / 1-col Mobile) */
.article-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .article-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .article-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.article-card {
  background: var(--bg-panel);
  border: 1px solid var(--border-beat-grid);
  border-radius: var(--radius-lg);
  padding: 1.6rem 1.4rem;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
  position: relative;
}

.article-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-peach);
  background: var(--bg-panel-elevated);
}

.article-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.85rem;
  font-size: 0.78rem;
  font-family: var(--font-mono);
  color: var(--accent-lavender);
}

.article-category {
  padding: 2px 8px;
  background: var(--bg-deep-plum);
  border-radius: var(--radius-pill);
}

.article-card-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-pale-blush);
  margin-bottom: 0.65rem;
  line-height: 1.4;
}

.article-card-title a {
  color: inherit;
}

.article-card-title a:hover {
  color: var(--accent-peach);
}

.article-card-desc {
  font-size: 0.88rem;
  color: var(--text-pale-muted);
  line-height: 1.6;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.article-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
  color: var(--accent-lavender-light);
  border-top: 1px solid var(--border-beat-grid);
  padding-top: 0.85rem;
}

/* Testimonials / Reviews (Visibly marked demonstration reviews) */
.testimonials-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .testimonials-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.testimonial-card {
  background: var(--bg-panel);
  border: 1px solid var(--border-beat-grid);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
}

.testimonial-demo-badge {
  display: inline-block;
  align-self: flex-start;
  font-size: 0.72rem;
  font-family: var(--font-mono);
  background: var(--accent-lavender-dim);
  color: var(--accent-lavender-light);
  padding: 2px 7px;
  border-radius: var(--radius-sm);
  margin-bottom: 1rem;
}

.testimonial-text {
  font-size: 0.94rem;
  color: var(--text-pale-blush);
  line-height: 1.65;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.author-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bg-deep-plum);
  border: 1px solid var(--accent-lavender);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--accent-peach-light);
}

.author-meta h4 {
  font-size: 0.92rem;
  color: var(--text-pale-blush);
}

.author-meta p {
  font-size: 0.78rem;
  color: var(--text-dim);
}

/* Accordion FAQ */
.faq-accordion {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.faq-item {
  background: var(--bg-panel);
  border: 1px solid var(--border-beat-grid);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-normal);
}

.faq-item.is-active {
  border-color: var(--accent-lavender);
}

.faq-trigger {
  width: 100%;
  padding: 1.2rem 1.4rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-align: left;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-pale-blush);
}

.faq-trigger:hover {
  color: var(--accent-peach-light);
}

.faq-icon {
  width: 20px;
  height: 20px;
  fill: var(--accent-lavender);
  transition: transform var(--transition-normal);
  flex-shrink: 0;
}

.faq-item.is-active .faq-icon {
  transform: rotate(180deg);
  fill: var(--accent-peach);
}

.faq-content {
  display: none;
  padding: 0 1.4rem 1.4rem;
  font-size: 0.94rem;
  color: var(--text-pale-muted);
  line-height: 1.7;
}

.faq-item.is-active .faq-content {
  display: block;
}

/* Footer Component */
.site-footer {
  background: var(--bg-deep-plum-dark);
  border-top: 1px solid var(--border-beat-grid);
  padding: 4rem 0 2rem;
  font-size: 0.9rem;
  color: var(--text-dim);
}

.footer-top-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  margin-bottom: 3rem;
}

@media (min-width: 640px) {
  .footer-top-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .footer-top-grid {
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
  }
}

.footer-col h4 {
  color: var(--text-pale-blush);
  font-size: 1rem;
  margin-bottom: 1rem;
  font-weight: 600;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.footer-links a {
  color: var(--text-pale-muted);
  font-size: 0.88rem;
}

.footer-links a:hover {
  color: var(--accent-peach);
}

.related-partner-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.related-partner-list a {
  color: var(--accent-lavender-light);
  font-size: 0.88rem;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.related-partner-list a:hover {
  color: var(--accent-peach);
}

.footer-bottom-bar {
  border-top: 1px solid var(--border-beat-grid);
  padding-top: 1.75rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  text-align: center;
  font-size: 0.82rem;
}

@media (min-width: 768px) {
  .footer-bottom-bar {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

/* Article Template Specific Styles */
.article-header-area {
  padding: 3rem 0 2rem;
  border-bottom: 1px solid var(--border-beat-grid);
  margin-bottom: 2.5rem;
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-bottom: 1.25rem;
}

.breadcrumbs a {
  color: var(--accent-lavender);
}

.breadcrumbs a:hover {
  color: var(--accent-peach);
}

.article-title-main {
  font-size: clamp(1.8rem, 4vw, 2.75rem);
  font-weight: 800;
  line-height: 1.25;
  color: var(--text-pale-blush);
  margin-bottom: 1rem;
}

.article-meta-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.25rem;
  font-size: 0.85rem;
  color: var(--accent-lavender-light);
  font-family: var(--font-mono);
}

/* Substantive Article Content Layout */
.article-body-content {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--text-pale-muted);
}

.article-body-content h2 {
  font-size: 1.6rem;
  color: var(--text-pale-blush);
  margin: 2.5rem 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-beat-grid);
}

.article-body-content h3 {
  font-size: 1.25rem;
  color: var(--accent-peach-light);
  margin: 1.85rem 0 0.75rem;
}

.article-body-content p {
  margin-bottom: 1.35rem;
}

.article-body-content ul,
.article-body-content ol {
  margin: 1rem 0 1.5rem 1.5rem;
}

.article-body-content li {
  margin-bottom: 0.5rem;
}

.article-body-content blockquote {
  border-left: 3px solid var(--accent-peach);
  background: var(--bg-panel);
  padding: 1rem 1.25rem;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 1.5rem 0;
  font-style: normal;
  color: var(--text-pale-blush);
}

.article-body-content code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--bg-deep-plum-alt);
  color: var(--accent-peach-light);
  padding: 0.15rem 0.4rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-beat-grid);
}

.article-body-content pre {
  background: var(--bg-deep-plum-dark);
  border: 1px solid var(--border-beat-grid);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  overflow-x: auto;
  margin: 1.5rem 0;
}

.article-body-content pre code {
  background: transparent;
  padding: 0;
  border: none;
  color: var(--text-pale-blush);
}

/* In-Article Callout Box */
.article-cta-box {
  background: linear-gradient(135deg, var(--bg-panel-elevated), var(--bg-panel));
  border: 1px solid var(--accent-peach);
  border-radius: var(--radius-lg);
  padding: 2rem;
  margin: 2.5rem 0;
  text-align: center;
}

.article-cta-box h3 {
  font-size: 1.35rem;
  color: var(--text-pale-blush);
  margin-bottom: 0.5rem;
}

.article-cta-box p {
  font-size: 0.95rem;
  color: var(--text-pale-muted);
  max-width: 600px;
  margin: 0 auto 1.5rem;
}

/* Related Articles Section */
.related-articles-section {
  border-top: 1px solid var(--border-beat-grid);
  padding-top: 2.5rem;
  margin-top: 3.5rem;
}

.related-articles-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin-top: 1.25rem;
}

@media (min-width: 640px) {
  .related-articles-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.related-article-card {
  background: var(--bg-panel);
  border: 1px solid var(--border-beat-grid);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  transition: all var(--transition-normal);
}

.related-article-card:hover {
  border-color: var(--accent-lavender);
  transform: translateY(-2px);
}

.related-article-card h4 {
  font-size: 0.98rem;
  color: var(--text-pale-blush);
  margin-bottom: 0.4rem;
}

.related-article-card p {
  font-size: 0.82rem;
  color: var(--text-dim);
}

/* Static Informational Pages (About, Terms, Privacy, Sitemap) */
.page-header {
  padding: 3.5rem 0 2rem;
  border-bottom: 1px solid var(--border-beat-grid);
  margin-bottom: 2.5rem;
  text-align: center;
}

.page-title {
  font-size: clamp(2rem, 4vw, 2.85rem);
  font-weight: 800;
  color: var(--text-pale-blush);
  margin-bottom: 0.75rem;
}

.page-subtitle {
  font-size: 1.05rem;
  color: var(--text-pale-muted);
}

.legal-section-block {
  background: var(--bg-panel);
  border: 1px solid var(--border-beat-grid);
  border-radius: var(--radius-lg);
  padding: 2rem;
  margin-bottom: 2rem;
}

.legal-section-block h2 {
  font-size: 1.35rem;
  color: var(--text-pale-blush);
  margin-bottom: 1rem;
}

.legal-section-block p {
  color: var(--text-pale-muted);
  font-size: 0.98rem;
  margin-bottom: 1rem;
}

.legal-section-block p:last-child {
  margin-bottom: 0;
}

/* Visual HTML Sitemap Tree */
.sitemap-tree-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

@media (min-width: 768px) {
  .sitemap-tree-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.sitemap-group {
  background: var(--bg-panel);
  border: 1px solid var(--border-beat-grid);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
}

.sitemap-group h3 {
  font-size: 1.2rem;
  color: var(--accent-peach-light);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-beat-grid);
}

.sitemap-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.sitemap-list a {
  color: var(--text-pale-blush);
  font-size: 0.95rem;
}

.sitemap-list a:hover {
  color: var(--accent-peach);
}

/* Accessibility: prefers-reduced-motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}