/* ============================================================
   PettyUI Showcase — Premium Dark SaaS Theme
   ============================================================ */

/* --- Design Tokens --- */
:root {
  /* ── Gray palette (Slate) ── */
  --gray-1: #f4f6f9;
  --gray-2: #f1f5f9;
  --gray-3: #e2e8f0;
  --gray-4: #cbd5e1;
  --gray-5: #94a3b8;
  --gray-6: #64748b;
  --gray-7: #475569;
  --gray-8: #334155;
  --gray-9: #1e293b;
  --gray-10: #0f172a;

  /* ── Accent palette (Aperture Blue) ── */
  --accent-1: #edf9fe;
  --accent-2: #d4f1fd;
  --accent-3: #a8e3fb;
  --accent-4: #6dcef5;
  --accent-5: #36c0f1;
  --accent-6: #1fa8d8;
  --accent-7: #1890ba;
  --accent-8: #14769a;
  --accent-contrast: #ffffff;

  /* ── Semantic colors ── */
  --color-bg: var(--gray-1);
  --color-surface: #ffffff;
  --color-surface-raised: var(--gray-2);
  --color-surface-sunken: var(--gray-3);
  --color-border: var(--gray-3);
  --color-border-strong: var(--gray-4);
  --color-text: var(--gray-10);
  --color-text-secondary: var(--gray-6);
  --color-text-tertiary: var(--gray-5);
  --color-accent: var(--accent-5);
  --color-accent-hover: var(--accent-6);
  --color-accent-subtle: var(--accent-1);
  --color-accent-muted: rgba(54, 192, 241, 0.08);
  --color-danger: #dc2626;
  --color-danger-subtle: #fef2f2;
  --color-warning: #d97706;
  --color-warning-subtle: #fffbeb;
  --color-success: #16a34a;
  --color-success-subtle: #f0fdf4;

  /* ── Typography ── */
  --font-sans: "Instrument Sans", -apple-system, system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-hero: clamp(3rem, 8vw, 5rem);
  --weight-normal: 400;
  --weight-medium: 500;
  --weight-semibold: 600;
  --weight-bold: 700;
  --leading-tight: 1.15;
  --leading-normal: 1.5;
  --leading-relaxed: 1.7;

  /* ── Spacing (4px base) ── */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* ── Radius (3 values: small, medium, pill) ── */
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 12px;
  --radius-pill: 22px;

  /* ── Elevation ── */
  --elevation-0: none;
  --elevation-1: 0 1px 2px rgba(0,0,0,0.05), 0 1px 3px rgba(0,0,0,0.04);
  --elevation-2: 0 2px 4px rgba(0,0,0,0.05), 0 2px 8px rgba(0,0,0,0.04);
  --elevation-3: 0 4px 8px rgba(0,0,0,0.06), 0 2px 4px rgba(0,0,0,0.04);
  --elevation-4: 0 8px 16px rgba(0,0,0,0.08), 0 2px 4px rgba(0,0,0,0.04);

  /* ── State layers ── */
  --state-hover: rgba(0, 0, 0, 0.04);
  --state-focus: rgba(0, 0, 0, 0.06);
  --state-pressed: rgba(0, 0, 0, 0.08);

  /* ── Motion (M3 Expressive) ── */
  --ease-standard: cubic-bezier(0.2, 0, 0, 1);
  --ease-expressive: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-effects: cubic-bezier(0.4, 0, 0.2, 1);
  --duration-fast: 100ms;
  --duration-normal: 150ms;
  --duration-emphasis: 350ms;

  /* ── Legacy aliases (used in component styles) ── */
  --c-bg: var(--color-bg);
  --c-surface: var(--color-surface);
  --c-surface-solid: var(--color-surface);
  --c-surface-2: var(--color-surface-raised);
  --c-surface-3: var(--color-surface-sunken);
  --c-border: var(--color-border);
  --c-border-2: var(--color-border-strong);
  --c-green: var(--color-accent);
  --c-green-dim: var(--color-accent-hover);
  --c-green-glow: var(--color-accent-muted);
  --c-green-glow-md: rgba(37, 99, 235, 0.12);
  --c-pink: var(--color-danger);
  --c-yellow: var(--color-warning);
  --c-blue: var(--color-accent);
  --c-text: var(--color-text);
  --c-text-2: var(--color-text-secondary);
  --c-text-3: var(--color-text-tertiary);
}

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

html {
  scroll-behavior: smooth;
}

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-weight: var(--weight-normal);
  font-size: var(--text-base);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* --- Accessibility: Skip Nav --- */
.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  background: var(--accent-8);
  color: #fff;
  padding: 12px 16px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  font-weight: 600;
  z-index: 100;
  text-decoration: none;
}

.skip-link:focus-visible {
  top: 1rem;
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* --- Global Focus Styles --- */
button, a, input, select, textarea, [tabindex] {
  outline: 2px solid transparent;
  outline-offset: 2px;
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* --- Screen Reader Only --- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* --- Page Container --- */
.page {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 clamp(1.5rem, 5vw, 3rem) 8rem;
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  position: relative;
  padding: 8rem 0 6rem;
}

.hero::before {
  display: none;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--color-accent-subtle);
  border: 1px solid var(--accent-3);
  border-radius: var(--radius-pill);
  padding: 6px 16px;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-accent);
  letter-spacing: 0.01em;
  margin-bottom: var(--space-8);
  position: relative;
}

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

.hero h1 {
  font-family: var(--font-sans);
  font-size: clamp(2.5rem, 8vw, 4.5rem);
  font-weight: var(--weight-bold);
  letter-spacing: -0.045em;
  line-height: 1;
  position: relative;
  color: var(--color-text);
}

.hero-sub {
  color: var(--color-text-secondary);
  font-family: var(--font-sans);
  font-size: clamp(1rem, 1.8vw, 1.125rem);
  font-weight: var(--weight-normal);
  line-height: var(--leading-relaxed);
  margin-top: var(--space-5);
  max-width: 48ch;
  position: relative;
}


/* Stats row */
.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  margin-top: var(--space-8);
}

.hero-stat {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
}

.hero-stat petty-counter {
  font-weight: var(--weight-bold);
  font-variant-numeric: tabular-nums;
  color: var(--color-text);
}

.hero-stat-dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--color-border-strong);
  color: var(--color-border-strong);
  font-size: 0;
}

/* Custom element display */
petty-typewriter {
  display: inline;
}

petty-reveal {
  display: block;
}

petty-counter {
  font-variant-numeric: tabular-nums;
}

/* ============================================================
   VALUE PROPS
   ============================================================ */
.value-props {
  margin-top: 0;
  padding: var(--space-16) 0;
  border-top: 1px solid var(--color-border);
}

.value-list {
  display: flex;
  gap: var(--space-12);
  margin: 0;
}

.value-item {
  flex: 1;
  min-width: 0;
}

.value-item:nth-child(2) {
  flex: 1.15;
}

.value-item dt {
  font-size: var(--text-lg);
  font-weight: var(--weight-semibold);
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.value-item dd {
  margin: 0;
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

/* ============================================================
   SECTIONS
   ============================================================ */

/* Separator between major areas */
.section-separator {
  position: relative;
  height: 1px;
  margin: 0;
}

.section-separator::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 0;
  transform: translateX(-50%);
  width: 100%;
  max-width: 600px;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    var(--c-border-2) 30%,
    var(--c-border-2) 70%,
    transparent 100%
  );
}

/* Ambient gradient between sections */
.section-glow {
  position: relative;
}

.section-glow::before {
  display: none;
}

.section {
  margin-top: 96px;
  position: relative;
}

.section-title {
  font-family: var(--font-sans);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: var(--weight-bold);
  letter-spacing: -0.035em;
  line-height: var(--leading-tight);
  color: var(--color-text);
}

.section-desc {
  font-family: var(--font-sans);
  font-size: var(--text-lg);
  font-weight: var(--weight-normal);
  color: var(--color-text-secondary);
  margin-top: var(--space-3);
  max-width: 50ch;
  margin-bottom: 40px;
  max-width: 48ch;
  line-height: 1.6;
}

/* ============================================================
   CARD GRID
   ============================================================ */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: var(--space-6);
}

.demo-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  box-shadow: var(--elevation-2);
}

.demo-card h3 {
  font-family: var(--font-sans);
  font-size: var(--text-lg);
  font-weight: var(--weight-semibold);
  color: var(--color-text);
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border);
}

.demo-card .tag-name {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: var(--weight-normal);
  color: var(--color-text-tertiary);
  margin-top: var(--space-6);
}

.demo-area {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.demo-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.demo-row-loose {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.demo-row-spacious {
  display: flex;
  align-items: flex-end;
  gap: var(--space-6);
  flex-wrap: wrap;
}

.wide {
  grid-column: 1 / -1;
}

.muted-sm {
  color: var(--c-text-3);
  font-size: var(--text-xs);
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer-section {
  text-align: center;
  padding-top: 48px;
  margin-top: 128px;
}

.footer-text {
  margin-top: 24px;
  font-size: var(--text-sm);
  color: var(--c-text-3);
  max-width: 65ch;
  margin-left: auto;
  margin-right: auto;
}

.st3-sig {
  text-align: right;
  padding: 48px 0 16px;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--c-text-3);
  letter-spacing: 0.2em;
  opacity: 0.5;
}

/* ============================================================
   COMPONENT STYLES: Buttons
   ============================================================ */
petty-button button {
  background: var(--color-surface);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-pill);
  color: var(--color-text);
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: var(--weight-medium);
  padding: 0 24px;
  line-height: 1;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background var(--duration-normal) var(--ease-effects), border-color var(--duration-fast), box-shadow var(--duration-normal) var(--ease-effects);
}

petty-button button:hover {
  background: var(--color-surface-raised);
  box-shadow: var(--elevation-1);
}

petty-button button:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

petty-button button:disabled, petty-button[disabled] button {
  opacity: 0.38;
  cursor: not-allowed;
}

petty-button[data-state="loading"] button {
  opacity: 0.38;
  cursor: wait;
}

petty-button button.primary {
  background: var(--accent-7);
  border-color: var(--accent-7);
  color: var(--accent-contrast);
  font-weight: var(--weight-medium);
  box-shadow: var(--elevation-1);
}

petty-button button.primary:hover {
  background: var(--accent-8);
  border-color: var(--accent-8);
  box-shadow: var(--elevation-2);
}

.btn-outline {
  background: var(--color-surface);
  border: 1px solid var(--color-border-strong);
  color: var(--color-text);
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: var(--weight-medium);
  padding: 0 24px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-pill);
  transition: background var(--duration-normal) var(--ease-effects), box-shadow var(--duration-normal);
}

.btn-outline:hover {
  background: var(--color-surface-raised);
  box-shadow: var(--elevation-1);
}

.btn-outline:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.hint-text {
  cursor: help;
  border-bottom: 1px dashed var(--c-text-3);
  color: var(--c-text-2);
  font-size: var(--text-sm);
  padding-bottom: 2px;
}

/* ============================================================
   COMPONENT STYLES: Badge & Avatar
   ============================================================ */
petty-badge {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  height: 32px;
  font-weight: 500;
  padding: 3px 12px;
  border-radius: var(--radius-md);
  border: 1px solid var(--c-border-2);
  background: var(--c-surface-2);
  color: var(--c-text-2);
}

petty-badge[data-variant="success"] {
  border-color: rgba(34, 197, 94, 0.3);
  color: var(--color-success);
  background: var(--color-success-subtle);
}

petty-badge[data-variant="error"] {
  border-color: rgba(244, 63, 94, 0.3);
  color: var(--c-pink);
  background: rgba(244, 63, 94, 0.08);
}

petty-badge[data-variant="warning"] {
  border-color: rgba(234, 179, 8, 0.3);
  color: var(--c-yellow);
  background: rgba(234, 179, 8, 0.08);
}

petty-avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--c-surface-3);
  color: var(--c-text-2);
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: 600;
}

petty-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
}

/* ============================================================
   COMPONENT STYLES: Separator
   ============================================================ */
petty-separator {
  display: block;
  height: 1px;
  background: var(--c-border);
  margin: 12px 0;
}

/* ============================================================
   COMPONENT STYLES: Skeleton & Card
   ============================================================ */
petty-skeleton {
  display: block;
  height: 0.75rem;
  border-radius: var(--radius-sm);
  background: var(--gray-3);
  animation: shimmer 1s var(--ease-standard) infinite alternate;
}

@keyframes shimmer {
  0% { opacity: 0.6; }
  100% { opacity: 1; }
}

.skeleton-stack {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.skel-80 {
  width: 80%;
  height: 10px;
  border-radius: 4px;
}

.skel-60 {
  width: 60%;
  height: 10px;
  border-radius: 4px;
}

.skel-70 {
  width: 70%;
  height: 10px;
  border-radius: 4px;
}

.skel-btn {
  width: 5rem;
  height: 2.75rem;
  border-radius: var(--radius-sm);
}

petty-card {
  display: block;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  background: var(--c-surface);
  overflow: hidden;
}

petty-card-header {
  display: block;
  padding: 20px 20px 0;
}

petty-card-header h4 {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 600;
}

petty-card-content {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 12px 20px;
  color: var(--c-text-2);
  font-size: var(--text-sm);
}

petty-card-footer {
  display: flex;
  gap: 8px;
  padding: 0 20px 20px;
}

/* ============================================================
   COMPONENT STYLES: Text Field
   ============================================================ */
petty-text-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

petty-text-field [data-part="label"] {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--c-text-2);
}

petty-text-field input[data-part="control"] {
  background: var(--c-bg);
  border: 1px solid var(--c-border-2);
  border-radius: var(--radius-sm);
  color: var(--c-text);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  padding: 16px;
  height: 56px;
  transition: border-color var(--duration-fast) var(--ease-effects), box-shadow var(--duration-fast) var(--ease-effects);
}

petty-text-field input:focus-visible {
  border-color: var(--color-accent);
  border-width: 2px;
  padding: 15px;
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

petty-text-field [data-part="error"] {
  color: var(--c-pink);
  font-size: var(--text-xs);
  min-height: 0.875rem;
}

petty-text-field [data-part="description"] {
  color: var(--c-text-3);
  font-size: var(--text-xs);
}

/* ============================================================
   COMPONENT STYLES: Checkbox & Switch
   ============================================================ */
petty-checkbox {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  min-height: 48px;
}

petty-checkbox input[data-part="control"] {
  appearance: none;
  width: 20px;
  height: 20px;
  border: 1.5px solid var(--c-border-2);
  border-radius: var(--radius-xs);
  background: var(--c-bg);
  cursor: pointer;
  font-size: var(--text-base);
  transition: background var(--duration-fast) var(--ease-effects), border-color var(--duration-fast) var(--ease-effects), transform var(--duration-normal) var(--ease-expressive);
}

petty-checkbox input:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

petty-checkbox input:checked {
  background: var(--color-accent);
  border-color: var(--color-accent);
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 16 16' fill='white' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M12.207 4.793a1 1 0 010 1.414l-5 5a1 1 0 01-1.414 0l-2-2a1 1 0 011.414-1.414L6.5 9.086l4.293-4.293a1 1 0 011.414 0z'/%3E%3C/svg%3E");
  background-size: 12px;
  background-position: center;
  background-repeat: no-repeat;
  transform: scale(1.1);
}

petty-checkbox input:not(:checked) {
  transform: scale(1);
}

petty-checkbox [data-part="label"] {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  color: var(--c-text-2);
  cursor: pointer;
}

petty-switch {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-height: 48px;
}

petty-switch button[data-part="control"] {
  position: relative;
  width: 52px;
  height: 32px;
  border-radius: 16px;
  border: none;
  background: var(--c-surface-3);
  cursor: pointer;
  transition: background var(--duration-normal) var(--ease-effects);
  padding: 6px 0;
  box-sizing: content-box;
}

petty-switch button[data-part="control"]:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

petty-switch[data-state="on"] button[data-part="control"] {
  background: var(--c-green);
}

petty-switch [data-part="thumb"] {
  display: block;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: white;
  color: var(--color-text);
  position: absolute;
  top: 4px;
  left: 6px;
  transform: scale(0.667);
  transform-origin: center;
  transition: transform var(--duration-normal) var(--ease-expressive);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12);
}

petty-switch[data-state="on"] [data-part="thumb"] {
  transform: translateX(22px) scale(1);
}

petty-switch [data-part="label"] {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  color: var(--c-text-2);
}

/* ============================================================
   COMPONENT STYLES: Radio Group
   ============================================================ */
petty-radio-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

petty-radio-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  color: var(--c-text-2);
  padding: 4px 0;
  min-height: 48px;
  transition: color var(--duration-fast) var(--ease-effects);
}

petty-radio-item[data-state="checked"] {
  color: var(--c-text);
}

petty-radio-item::before {
  content: "";
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 1.5px solid var(--c-border-2);
  background: var(--c-bg);
  transition: border-color var(--duration-fast) var(--ease-effects), border-width var(--duration-normal) var(--ease-expressive);
  flex-shrink: 0;
}

petty-radio-item[data-state="checked"]::before {
  border-color: var(--c-green);
  border-width: 5px;
}

/* ============================================================
   COMPONENT STYLES: Toggle & Toggle Group
   ============================================================ */
petty-toggle button[data-part="control"] {
  background: var(--color-surface);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-pill);
  color: var(--color-text-secondary);
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: var(--weight-medium);
  padding: 0 20px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background var(--duration-normal) var(--ease-effects), border-color var(--duration-normal) var(--ease-effects), color var(--duration-normal) var(--ease-effects);
}

petty-toggle button[data-part="control"]:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

petty-toggle[data-state="on"] button[data-part="control"] {
  background: var(--color-accent-subtle);
  border-color: var(--color-accent);
  color: var(--color-accent);
}

petty-toggle-group {
  display: inline-flex;
  border-radius: var(--radius-pill);
  overflow: hidden;
  border: 1px solid var(--color-border-strong);
}

petty-toggle-group-item {
  background: var(--color-surface);
  border: none;
  border-right: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: var(--weight-medium);
  padding: 0 20px;
  height: 44px;
  flex: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background var(--duration-fast) var(--ease-effects), color var(--duration-fast) var(--ease-effects);
}

petty-toggle-group-item:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: -2px;
}

petty-toggle-group-item:last-child {
  border-right: none;
}

petty-toggle-group-item[data-state="on"] {
  background: var(--accent-7);
  color: var(--accent-contrast);
}

/* ============================================================
   COMPONENT STYLES: Slider & Number Field
   ============================================================ */
petty-slider {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

petty-slider [data-part="label"] {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--c-text-2);
}

petty-slider input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  font-size: var(--text-base);
  width: 100%;
  height: 6px;
  background: var(--color-surface-sunken);
  border-radius: var(--radius-pill);
}

petty-slider input[type="range"]:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 4px;
}

petty-slider input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--color-accent);
  cursor: pointer;
  box-shadow: var(--elevation-2);
  transition: transform var(--duration-normal) var(--ease-expressive);
}

petty-slider input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

petty-slider input[type="range"]:active::-webkit-slider-thumb {
  transform: scale(1.25);
}

petty-slider [data-part="output"] {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--c-text-2);
  align-self: flex-end;
}

petty-number-field {
  display: inline-flex;
  align-items: center;
}

petty-number-field [data-part="label"] {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--c-text-2);
  margin-right: 12px;
}

petty-number-field button {
  background: var(--c-surface-2);
  border: 1px solid var(--c-border-2);
  color: var(--c-text-2);
  cursor: pointer;
  font-size: var(--text-sm);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--duration-fast) var(--ease-effects), color var(--duration-fast) var(--ease-effects);
}

petty-number-field button:hover {
  background: var(--c-surface-3);
  color: var(--c-text);
}

petty-number-field button:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: -2px;
}

petty-number-field [data-part="decrement"] {
  border-radius: var(--radius-sm) 0 0 var(--radius-sm);
}

petty-number-field [data-part="increment"] {
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

petty-number-field input[data-part="control"] {
  -moz-appearance: textfield;
  appearance: textfield;
  background: var(--c-bg);
  border: 1px solid var(--c-border-2);
  border-left: none;
  border-right: none;
  color: var(--c-text);
  font-family: var(--font-mono);
  font-size: var(--text-base);
  text-align: center;
  width: 48px;
  height: 44px;
}

petty-number-field input:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: -2px;
}

petty-number-field input::-webkit-inner-spin-button,
petty-number-field input::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

/* ============================================================
   COMPONENT STYLES: Tags Input
   ============================================================ */
petty-tags-input {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  background: var(--c-bg);
  border: 1px solid var(--c-border-2);
  border-radius: var(--radius-sm);
  padding: 6px 10px;
  transition: border-color var(--duration-fast) var(--ease-effects), box-shadow var(--duration-fast) var(--ease-effects);
}

petty-tags-input:focus-within {
  border-color: var(--c-green);
  box-shadow: 0 0 0 3px var(--c-green-glow);
}

petty-tags-input [data-part="tags"] {
  display: contents;
}

petty-tags-input [data-part="tag"] {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: var(--c-green-glow);
  border: 1px solid rgba(34, 197, 94, 0.2);
  border-radius: 4px;
  color: var(--c-green);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  padding: 2px 8px;
}

petty-tags-input [data-part="tag-remove"] {
  background: none;
  border: none;
  color: var(--c-green-dim);
  cursor: pointer;
  font-size: var(--text-sm);
  padding: 4px;
  min-width: 24px;
  min-height: 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  border-radius: var(--radius-xs);
}

petty-tags-input [data-part="tag-remove"]:hover {
  color: var(--c-pink);
}

petty-tags-input input[data-part="input"] {
  background: transparent;
  border: none;
  color: var(--c-text);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  flex: 1;
  min-width: 80px;
  padding: 4px 0;
}

petty-tags-input input[data-part="input"]::placeholder {
  color: var(--c-text-3);
}

/* ============================================================
   COMPONENT STYLES: Select
   ============================================================ */
petty-select {
  display: inline-block;
}

petty-select [data-part="trigger"] {
  background: var(--c-surface-2);
  border: 1px solid var(--c-border-2);
  border-radius: var(--radius-sm);
  color: var(--c-text-2);
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  padding: 12px 16px;
  min-width: 150px;
  height: 44px;
  text-align: left;
  anchor-name: --petty-select-anchor;
  transition: border-color var(--duration-fast) var(--ease-effects);
}

petty-select [data-part="trigger"]:hover {
  border-color: var(--c-text-3);
}

petty-select [data-part="trigger"]:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

petty-select [data-part="listbox"] {
  background: var(--c-surface-2);
  border: 1px solid var(--c-border-2);
  border-radius: var(--radius-md);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.1);
  min-width: 150px;
  padding: 4px;
  margin: 0;
  position-anchor: --petty-select-anchor;
  inset: unset;
  top: anchor(bottom);
  left: anchor(left);
  margin-top: 4px;
}

petty-select-option {
  display: block;
  border-radius: var(--radius-xs);
  color: var(--c-text-2);
  cursor: pointer;
  font-size: var(--text-sm);
  padding: 8px 10px;
  transition: background var(--duration-fast) var(--ease-effects), color var(--duration-fast) var(--ease-effects);
}

petty-select-option:hover,
petty-select-option[data-highlighted] {
  background: var(--c-surface-3);
  color: var(--c-text);
}

petty-select-option[aria-selected="true"] {
  color: var(--c-green);
}

/* ============================================================
   COMPONENT STYLES: Tabs
   ============================================================ */
[role="tablist"] {
  display: flex;
  border-bottom: 1px solid var(--c-border);
  gap: 0;
}

petty-tab {
  background: none;
  border: none;
  border-bottom: 3px solid transparent;
  color: var(--c-text-3);
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 500;
  margin-bottom: -1px;
  padding: 12px 16px;
  height: 48px;
  display: inline-flex;
  align-items: center;
  transition: color var(--duration-fast) var(--ease-effects), border-color var(--duration-fast) var(--ease-effects);
}

petty-tab:hover {
  color: var(--c-text-2);
}

petty-tab:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: -2px;
}

petty-tab[data-state="active"] {
  color: var(--c-text);
  border-bottom-color: var(--c-green);
}

petty-tab-panel {
  display: block;
  padding: 20px 0;
  color: var(--c-text-2);
  font-size: var(--text-sm);
  line-height: 1.7;
  max-width: 65ch;
}

petty-tab-panel[hidden] {
  display: none;
}

/* ============================================================
   COMPONENT STYLES: Accordion
   ============================================================ */
petty-accordion {
  display: flex;
  flex-direction: column;
}

petty-accordion-item {
  display: block;
  border-bottom: 1px solid var(--c-border);
}

petty-accordion-item summary {
  color: var(--c-text-2);
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 500;
  list-style: none;
  padding: 16px 0;
  min-height: 48px;
  display: flex;
  align-items: center;
  transition: color var(--duration-fast) var(--ease-effects);
}

petty-accordion-item summary:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

petty-accordion-item summary::-webkit-details-marker {
  display: none;
}

petty-accordion-item details[open] summary {
  color: var(--c-text);
}

petty-accordion-item [data-part="content"] {
  color: var(--c-text-3);
  font-size: var(--text-sm);
  padding-bottom: 16px;
  line-height: 1.7;
}

/* ============================================================
   COMPONENT STYLES: Breadcrumbs & Pagination
   ============================================================ */
petty-breadcrumbs {
  display: flex;
  align-items: center;
}

petty-breadcrumbs ol {
  display: flex;
  align-items: center;
  list-style: none;
  padding: 0;
  margin: 0;
}

petty-breadcrumb-item {
  display: inline-flex;
  align-items: center;
  font-size: var(--text-sm);
}

petty-breadcrumb-item::after {
  content: "/";
  color: var(--c-text-3);
  margin: 0 8px;
}

petty-breadcrumb-item:last-child::after {
  display: none;
}

petty-breadcrumb-item a {
  color: var(--c-text-3);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-effects);
}

petty-breadcrumb-item a:hover {
  color: var(--c-text);
}

petty-breadcrumb-item[data-state="current"] {
  color: var(--c-text);
  font-weight: 500;
}

petty-pagination nav {
  display: flex;
  align-items: center;
  gap: 4px;
  min-height: 44px;
  flex-wrap: wrap;
}

petty-pagination-item {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: var(--c-surface-2);
  border: 1px solid var(--c-border);
  color: var(--c-text-3);
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 500;
  padding: 0 8px;
  transition: background var(--duration-fast) var(--ease-effects), color var(--duration-fast) var(--ease-effects);
}

petty-pagination-item:hover {
  background: var(--c-surface-3);
  color: var(--c-text);
}

petty-pagination-item:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

petty-pagination-item[data-state="active"] {
  background: var(--c-text);
  color: var(--c-bg);
  border-color: var(--c-text);
}

petty-pagination-item[disabled] {
  opacity: 0.38;
  cursor: not-allowed;
}

/* ============================================================
   COMPONENT STYLES: Dialog
   ============================================================ */
dialog {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--elevation-4);
  color: var(--color-text);
  max-width: min(90vw, 28rem);
  padding: var(--space-8);
  margin: auto;
  inset: 0;
  position: fixed;
}

dialog::backdrop {
  background: rgba(15, 23, 42, 0.5);
}

dialog h2 {
  font-family: var(--font-sans);
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: 8px;
}

dialog p {
  color: var(--c-text-2);
  font-size: var(--text-sm);
  margin-bottom: 24px;
  line-height: 1.7;
}

/* ============================================================
   COMPONENT STYLES: Popover & Tooltip
   ============================================================ */
[popover] {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--elevation-3);
  color: var(--color-text);
  font-size: var(--text-base);
  padding: var(--space-4) var(--space-5);
  margin: 0;
}

petty-popover {
  display: inline-block;
}

petty-popover button[popovertarget] {
  anchor-name: --popover-anchor;
}

petty-popover [popover] {
  position-anchor: --popover-anchor;
  inset: unset;
  top: anchor(bottom);
  left: anchor(left);
  margin-top: 6px;
}

petty-tooltip {
  display: inline-block;
}

petty-tooltip [data-part="trigger"] {
  anchor-name: --tooltip-anchor;
}

petty-tooltip [data-part="content"] {
  background: var(--c-text);
  color: var(--c-bg);
  font-size: var(--text-xs);
  font-weight: 500;
  padding: 6px 12px;
  border: none;
  border-radius: var(--radius-xs);
  position-anchor: --tooltip-anchor;
  inset: unset;
  top: anchor(bottom);
  left: anchor(center);
  translate: -50% 0;
  margin-top: 6px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* ============================================================
   COMPONENT STYLES: Dropdown Menu
   ============================================================ */
petty-dropdown-menu {
  display: inline-block;
}

petty-dropdown-menu [data-part="trigger"] {
  anchor-name: --menu-anchor;
}

petty-dropdown-menu [data-part="content"] {
  min-width: 10rem;
  padding: 4px;
  border-radius: 4px;
  position-anchor: --menu-anchor;
  inset: unset;
  top: anchor(bottom);
  left: anchor(left);
  margin-top: 4px;
}

petty-menu-item {
  display: block;
  border-radius: var(--radius-xs);
  color: var(--c-text-2);
  cursor: pointer;
  font-size: var(--text-sm);
  padding: 8px 10px;
  transition: background var(--duration-fast) var(--ease-effects), color var(--duration-fast) var(--ease-effects);
}

petty-menu-item:hover,
petty-menu-item:focus {
  background: var(--c-surface-3);
  color: var(--c-text);
}

petty-menu-item[disabled] {
  color: var(--c-text-3);
  opacity: 0.38;
  cursor: not-allowed;
}

petty-menu-item[disabled]:hover {
  background: transparent;
  color: var(--c-text-3);
}

/* ============================================================
   COMPONENT STYLES: Alert
   ============================================================ */
petty-alert {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  font-size: var(--text-base);
}

petty-alert[data-variant="success"] {
  border-color: #bbf7d0;
  background: var(--color-success-subtle);
}

petty-alert[data-variant="error"] {
  border-color: #fecaca;
  background: var(--color-danger-subtle);
}

petty-alert[data-variant="warning"] {
  border-color: #fde68a;
  background: var(--color-warning-subtle);
}

.alert-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-sm);
  margin-top: 1px;
}

petty-alert[data-variant="success"] .alert-icon { color: var(--color-success); }
petty-alert[data-variant="error"] .alert-icon { color: var(--color-danger); }
petty-alert[data-variant="warning"] .alert-icon { color: var(--color-warning); }

petty-alert [data-part="title"] {
  font-weight: var(--weight-semibold);
  font-size: var(--text-base);
  margin-bottom: var(--space-1);
  color: var(--color-text);
}

petty-alert [data-part="description"] {
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
}

/* ============================================================
   COMPONENT STYLES: Progress & Meter
   ============================================================ */
petty-progress { display: block; }
petty-meter { display: block; }

.progress-field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.progress-header {
  display: flex;
  justify-content: space-between;
  font-size: var(--text-sm);
  color: var(--color-text);
  font-weight: var(--weight-medium);
}

.progress-header .meter-low { color: var(--color-success); }
.progress-header .meter-high { color: var(--color-danger); }

petty-progress [data-part="track"],
petty-meter [data-part="track"] {
  height: 10px;
  background: var(--color-surface-sunken);
  border-radius: var(--radius-pill);
  overflow: hidden;
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.06);
}

petty-progress [data-part="fill"] {
  height: 100%;
  background: var(--color-accent);
  border-radius: var(--radius-pill);
  width: calc(var(--petty-progress, 0) * 100%);
}

petty-progress [data-part="label"] { display: none; }

petty-meter [data-part="fill"] {
  height: 100%;
  border-radius: var(--radius-pill);
  width: calc(var(--petty-meter-value, 0) * 100%);
}

petty-meter[data-state="low"] [data-part="fill"] { background: var(--color-danger); }
petty-meter[data-state="medium"] [data-part="fill"] { background: var(--color-warning); }
petty-meter[data-state="high"] [data-part="fill"] { background: var(--color-success); }
petty-meter[data-state="optimum"] [data-part="fill"] { background: var(--color-accent); }

/* ============================================================
   COMPONENT STYLES: Toast
   ============================================================ */
petty-toast-region {
  position: fixed;
  bottom: 24px;
  right: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-width: 22rem;
  width: 100%;
  z-index: 9997;
  pointer-events: none;
}

[data-part="toast"] {
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08), 0 16px 32px rgba(0, 0, 0, 0.06);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--space-1);
  padding: 16px;
  pointer-events: auto;
  animation: toastIn 0.4s var(--ease-expressive);
}

[data-part="toast"][data-type="success"] {
  background: var(--color-success-subtle);
  border-color: #bbf7d0;
}

[data-part="toast"][data-type="error"] {
  background: var(--color-danger-subtle);
  border-color: #fecaca;
}

[data-part="toast-title"] {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: var(--weight-semibold);
  line-height: 1.4;
}

[data-part="toast"][data-type="success"] [data-part="toast-title"] { color: var(--color-success); }
[data-part="toast"][data-type="error"] [data-part="toast-title"] { color: var(--color-danger); }

[data-part="toast-description"] {
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  line-height: 1.5;
  grid-column: 1;
}

[data-part="toast-close"] {
  background: none;
  border: none;
  color: var(--color-text-tertiary);
  cursor: pointer;
  font-size: var(--text-base);
  padding: 8px;
  min-width: 44px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  grid-row: 1;
  grid-column: 2;
  align-self: start;
  transition: color var(--duration-fast);
  border-radius: var(--radius-sm);
}

[data-part="toast-close"]:hover {
  color: var(--color-text);
}

@keyframes toastIn {
  from {
    transform: translateY(100%) scale(0.9);
    opacity: 0;
  }
  to {
    transform: translateY(0) scale(1);
    opacity: 1;
  }
}

/* ============================================================
   COMPONENT STYLES: Link & Collapsible
   ============================================================ */
petty-link a {
  color: var(--c-green);
  text-decoration: none;
  font-size: var(--text-sm);
  transition: opacity var(--duration-fast) var(--ease-effects);
}

petty-link a:hover {
  opacity: 0.8;
}

petty-collapsible summary {
  color: var(--c-text-2);
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 500;
  list-style: none;
  padding: 8px 0;
}

petty-collapsible summary::-webkit-details-marker {
  display: none;
}

petty-collapsible [data-part="content"] {
  color: var(--c-text-3);
  font-size: var(--text-sm);
  padding: 8px 0;
  line-height: 1.7;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 768px) {
  .hero-stats {
    flex-wrap: wrap;
  }

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

  .value-list {
    flex-direction: column;
    gap: var(--space-8);
  }

  .section {
    margin-top: 64px;
  }

  .footer-section {
    margin-top: 80px;
  }

  .hero {
    padding: 6rem 0 4rem;
  }
}