/* ==========================================================================
   VIBE CODER - STYLESHEET
   Clean Dark Minimal Aesthetic (No heavy assets, pure modern CSS)
   ========================================================================== */

:root {
  /* Color Palette */
  --bg-main: #0a0c10;
  --bg-surface: #11141d;
  --bg-surface-elevated: #181d2a;
  --bg-surface-hover: #202738;
  
  --border-subtle: rgba(255, 255, 255, 0.07);
  --border-light: rgba(255, 255, 255, 0.12);
  --border-focus: #6366f1;

  --text-primary: #f3f4f6;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;
  --text-inverse: #0a0c10;

  --accent-primary: #6366f1;
  --accent-secondary: #06b6d4;
  --accent-gradient: linear-gradient(135deg, #6366f1 0%, #38bdf8 100%);
  --accent-glow: rgba(99, 102, 241, 0.25);

  --color-success: #10b981;
  --color-error: #f43f5e;
  --color-warning: #f59e0b;

  /* Typography */
  --font-sans: 'Pretendard', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', Consolas, "Fira Code", monospace;

  /* Spacing & Layout */
  --max-width: 1100px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
}

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

html {
  font-family: var(--font-sans);
  background-color: var(--bg-main);
  color: var(--text-primary);
  scroll-behavior: smooth;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  background-image: 
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(99, 102, 241, 0.15), transparent 70%),
    radial-gradient(circle at 90% 20%, rgba(56, 189, 248, 0.05), transparent 40%);
  background-attachment: fixed;
}

/* Typography Helpers */
h1, h2, h3, h4 {
  color: var(--text-primary);
  line-height: 1.25;
  font-weight: 700;
  letter-spacing: -0.02em;
}

p {
  color: var(--text-secondary);
}

code {
  font-family: var(--font-mono);
  background-color: rgba(255, 255, 255, 0.08);
  padding: 0.15rem 0.4rem;
  border-radius: var(--radius-sm);
  font-size: 0.88em;
  color: #38bdf8;
}

a {
  color: inherit;
  text-decoration: none;
}

/* Layout Container */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
  background-color: rgba(10, 12, 16, 0.85);
  border-bottom: 1px solid var(--border-subtle);
  transition: border-color var(--transition-normal);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: 0.05em;
}

.logo-symbol {
  color: var(--accent-secondary);
  font-family: var(--font-mono);
  font-size: 1.1rem;
}

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

.nav-links {
  display: flex;
  gap: 1.75rem;
}

.nav-links a {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 500;
  transition: color var(--transition-fast);
}

.nav-links a:hover {
  color: var(--text-primary);
}

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

.header-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.3rem 0.8rem;
  border-radius: var(--radius-full);
  background: rgba(99, 102, 241, 0.12);
  border: 1px solid rgba(99, 102, 241, 0.3);
  color: #a5b4fc;
}

.badge-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: #38bdf8;
  box-shadow: 0 0 8px #38bdf8;
  animation: pulse-dot 2s infinite ease-in-out;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

/* ==========================================================================
   Buttons & Micro-Components
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.4rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  text-align: center;
  text-decoration: none;
  white-space: nowrap;
}

.btn-sm {
  padding: 0.42rem 1rem;
  font-size: 0.82rem;
  font-weight: 600;
  border-radius: var(--radius-full);
}

.btn-primary {
  background: var(--accent-gradient);
  color: #ffffff;
  box-shadow: 0 4px 14px var(--accent-glow);
}

.btn-primary:hover {
  filter: brightness(1.1);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.35);
}

.btn-secondary {
  background: var(--bg-surface-elevated);
  color: var(--text-primary);
  border: 1px solid var(--border-light);
}

.btn-secondary:hover {
  background: var(--bg-surface-hover);
  border-color: rgba(255, 255, 255, 0.25);
  transform: translateY(-1px);
}

.btn-full {
  width: 100%;
}

.tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #818cf8;
  background: rgba(99, 102, 241, 0.1);
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-full);
  border: 1px solid rgba(99, 102, 241, 0.2);
  margin-bottom: 1.25rem;
}

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

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
  padding: 5.5rem 0 4rem;
  text-align: center;
  position: relative;
}

.hero-content {
  max-width: 820px;
}

.hero-title {
  font-size: 3.2rem;
  line-height: 1.2;
  margin-bottom: 1.5rem;
  font-weight: 800;
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 2.25rem;
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 3.5rem;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  border-top: 1px solid var(--border-subtle);
  padding-top: 2.5rem;
}

.stat-card {
  padding: 1rem;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.stat-number {
  font-size: 1.85rem;
  font-weight: 800;
  color: #38bdf8;
  font-family: var(--font-mono);
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Section Commons
   ========================================================================== */
.section {
  padding: 5rem 0;
  position: relative;
}

.bg-surface {
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.section-header {
  margin-bottom: 3rem;
  text-align: left;
}

.section-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--accent-secondary);
  margin-bottom: 0.5rem;
}

.section-header h2 {
  font-size: 2rem;
  margin-bottom: 0.75rem;
}

.section-header p {
  font-size: 1.05rem;
  max-width: 680px;
}

/* ==========================================================================
   About: Traditional vs Vibe Coding
   ========================================================================== */
.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.compare-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.compare-card:hover {
  transform: translateY(-2px);
  border-color: var(--border-light);
}

.compare-card.vibe {
  background: linear-gradient(180deg, rgba(99, 102, 241, 0.08) 0%, rgba(17, 20, 29, 0.95) 100%);
  border: 1px solid rgba(99, 102, 241, 0.28);
}

.card-header {
  margin-bottom: 1.5rem;
}

.card-status {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
}

.card-status.highlight {
  color: #38bdf8;
}

.card-header h3 {
  font-size: 1.4rem;
}

.compare-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.compare-list li {
  position: relative;
  padding-left: 1.5rem;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.compare-card.traditional .compare-list li::before {
  content: "×";
  position: absolute;
  left: 0;
  top: -1px;
  color: var(--color-error);
  font-weight: bold;
  font-size: 1.1rem;
}

.compare-card.vibe .compare-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0px;
  color: var(--color-success);
  font-weight: bold;
  font-size: 1rem;
}

/* ==========================================================================
   5 Principles Grid
   ========================================================================== */
.principles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.principle-card {
  background-color: var(--bg-main);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all var(--transition-fast);
}

.principle-card:hover {
  border-color: rgba(99, 102, 241, 0.4);
  transform: translateY(-3px);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.4);
}

.principle-num {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent-secondary);
  margin-bottom: 0.75rem;
  opacity: 0.85;
}

.principle-card h3 {
  font-size: 1.15rem;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.principle-card p {
  font-size: 0.92rem;
  line-height: 1.6;
  flex-grow: 1;
  margin-bottom: 1.25rem;
}

.principle-tip {
  font-size: 0.82rem;
  color: #cbd5e1;
  background-color: rgba(255, 255, 255, 0.04);
  padding: 0.65rem 0.8rem;
  border-radius: var(--radius-sm);
  border-left: 2px solid var(--accent-primary);
}

.special-card {
  background: linear-gradient(145deg, #181d2a 0%, #11141d 100%);
  border-color: rgba(99, 102, 241, 0.35);
}

.special-card .principle-num {
  color: #f59e0b;
}

/* ==========================================================================
   Workflow Timeline
   ========================================================================== */
.timeline {
  display: flex;
  align-items: stretch;
  justify-content: space-between;
  gap: 0.75rem;
  margin-top: 1rem;
}

.timeline-step {
  flex: 1;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition-fast);
}

.timeline-step:hover {
  border-color: var(--border-light);
}

.step-badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: #38bdf8;
  background-color: rgba(56, 189, 248, 0.1);
  display: inline-block;
  align-self: flex-start;
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-sm);
  margin-bottom: 0.85rem;
}

.step-content h4 {
  font-size: 1.05rem;
  margin-bottom: 0.5rem;
}

.step-content p {
  font-size: 0.88rem;
  line-height: 1.5;
}

.timeline-connector {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 1.2rem;
  padding: 0 0.25rem;
}

.timeline-connector::after {
  content: "→";
}

/* ==========================================================================
   Prompt Lab (Tabs & Builder)
   ========================================================================== */
.lab-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 0.5rem;
}

.tab-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 0.6rem 1.2rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.tab-btn:hover {
  color: var(--text-primary);
  background-color: rgba(255, 255, 255, 0.04);
}

.tab-btn.active {
  color: #ffffff;
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-light);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

.prompt-compare-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.prompt-box {
  background: var(--bg-main);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-subtle);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
}

.prompt-box.bad {
  border-left: 3px solid var(--color-error);
}

.prompt-box.good {
  border-left: 3px solid var(--color-success);
}

.prompt-box-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.tag-status {
  font-size: 0.7rem;
  font-weight: 800;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  letter-spacing: 0.05em;
}

.tag-status.error {
  background-color: rgba(244, 63, 94, 0.15);
  color: #fda4af;
  border: 1px solid rgba(244, 63, 94, 0.3);
}

.tag-status.success {
  background-color: rgba(16, 185, 129, 0.15);
  color: #6ee7b7;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.prompt-box-header span:last-child {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.code-wrapper {
  position: relative;
  background-color: #050608;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1rem;
  margin-bottom: 1.25rem;
}

.code-wrapper pre {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
}

.code-wrapper code {
  background: none;
  padding: 0;
  color: #e2e8f0;
  font-size: 0.88rem;
  line-height: 1.5;
}

.copy-btn {
  position: absolute;
  top: 0.6rem;
  right: 0.6rem;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-light);
  color: var(--text-secondary);
  padding: 0.35rem 0.65rem;
  font-size: 0.78rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.copy-btn:hover {
  background-color: var(--bg-surface-hover);
  color: var(--text-primary);
}

.copy-btn svg {
  display: block;
}

.prompt-analysis {
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.prompt-analysis strong {
  display: block;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.prompt-analysis ul {
  padding-left: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

/* Builder Layout */
.builder-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  background: var(--bg-main);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
}

.builder-inputs {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
}

.form-group input,
.form-group textarea {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  padding: 0.7rem 0.9rem;
  font-family: inherit;
  font-size: 0.9rem;
  outline: none;
  transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.2);
}

.builder-preview {
  display: flex;
  flex-direction: column;
  background-color: #050608;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1rem;
}

.preview-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
}

.code-output {
  flex-grow: 1;
  background: transparent;
  border: none;
  color: #38bdf8;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  line-height: 1.6;
  resize: none;
  outline: none;
  white-space: pre-wrap;
}

/* ==========================================================================
   Checklist & Vibe Meter
   ========================================================================== */
.meter-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
}

.meter-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 1.25rem;
}

.meter-header h3 {
  font-size: 1.4rem;
  margin-bottom: 0.25rem;
}

.meter-subtitle {
  font-size: 0.9rem;
}

.score-display {
  font-family: var(--font-mono);
}

.score-val {
  font-size: 2.5rem;
  font-weight: 800;
  color: #38bdf8;
  transition: color var(--transition-normal);
}

.score-max {
  font-size: 1.1rem;
  color: var(--text-muted);
}

.progress-bar-bg {
  width: 100%;
  height: 8px;
  background-color: rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin-bottom: 1.25rem;
}

.progress-bar-fill {
  height: 100%;
  background: var(--accent-gradient);
  border-radius: var(--radius-full);
  transition: width 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.feedback-msg {
  padding: 0.75rem 1rem;
  background-color: var(--bg-surface-elevated);
  border-radius: var(--radius-md);
  font-size: 0.92rem;
  color: #cbd5e1;
  border: 1px solid var(--border-subtle);
  margin-bottom: 1.75rem;
  transition: all var(--transition-fast);
}

.checklist-items {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.check-item {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  background: var(--bg-main);
  border: 1px solid var(--border-subtle);
  padding: 1rem 1.25rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  user-select: none;
}

.check-item:hover {
  border-color: var(--border-light);
  background: rgba(255, 255, 255, 0.02);
}

.check-item input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  cursor: pointer;
  height: 0;
  width: 0;
}

.checkbox-custom {
  position: relative;
  display: inline-block;
  width: 20px;
  height: 20px;
  min-width: 20px;
  margin-top: 2px;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-light);
  border-radius: 4px;
  transition: all var(--transition-fast);
}

.check-item input:checked ~ .checkbox-custom {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
}

.check-item input:checked ~ .checkbox-custom::after {
  content: "";
  position: absolute;
  left: 6px;
  top: 2px;
  width: 5px;
  height: 10px;
  border: solid white;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.check-item input:checked ~ .check-text {
  color: var(--text-primary);
}

.check-text {
  font-size: 0.93rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.check-text strong {
  color: var(--text-primary);
}

/* ==========================================================================
   Summary Section
   ========================================================================== */
.summary-section {
  padding: 6rem 0;
  background: radial-gradient(circle at 50% 50%, rgba(99, 102, 241, 0.08), transparent 60%);
}

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

.summary-section h2 {
  font-size: 2.2rem;
  margin-bottom: 0.75rem;
}

.quote-author {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: #38bdf8;
  margin-bottom: 1.75rem;
}

.summary-body {
  font-size: 1.15rem;
  max-width: 650px;
  margin: 0 auto 2.5rem;
  line-height: 1.7;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  border-top: 1px solid var(--border-subtle);
  padding: 2.5rem 0;
  background-color: var(--bg-main);
  margin-top: auto;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  text-align: center;
}

.footer-copy {
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.footer-sub {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Toast Notification
   ========================================================================== */
.toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: #1e293b;
  color: #f8fafc;
  border: 1px solid rgba(255, 255, 255, 0.15);
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-md);
  font-size: 0.88rem;
  font-weight: 500;
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.5);
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 1000;
  pointer-events: none;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

/* ==========================================================================
   Responsive Design
   ========================================================================== */
@media (max-width: 900px) {
  .hero-title {
    font-size: 2.4rem;
  }
  
  .principles-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .timeline {
    flex-direction: column;
  }

  .timeline-connector {
    transform: rotate(90deg);
    padding: 0.5rem 0;
  }

  .prompt-compare-container,
  .builder-wrapper {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .nav-links {
    display: none; /* simple mobile view */
  }

  .header-badge {
    display: none;
  }

  .hero-title {
    font-size: 2rem;
  }

  .hero-desc {
    font-size: 1rem;
  }

  .hero-stats {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .compare-grid {
    grid-template-columns: 1fr;
  }

  .principles-grid {
    grid-template-columns: 1fr;
  }

  .meter-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }
}