/* ═══════════════════════════════════════════════════════════════════════════
   PIXELFORGE V4 — ZenMix Design System
   Single-file CSS · Production-grade · 2026
   Dark Violet-Zen Theme · Mobile-first · BEM + pf- prefix
   ═══════════════════════════════════════════════════════════════════════════ */

/* ── Google Fonts Import ── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

/* ═══════════════════════════════════════════════════════════════════════════
   LAYER ARCHITECTURE
   ═══════════════════════════════════════════════════════════════════════════ */
@layer pf-tokens, pf-reset, pf-base, pf-layout, pf-components, pf-utils, pf-animations;

/* ═══════════════════════════════════════════════════════════════════════════
   LAYER 1 · DESIGN TOKENS / CUSTOM PROPERTIES
   ═══════════════════════════════════════════════════════════════════════════ */
@layer pf-tokens {
  :root {
    /* ── Color Palette ── */
    --pf-hue-primary: 270;
    --pf-hue-accent: 37;

    --pf-bg-deep: oklch(8% 0.04 var(--pf-hue-primary));
    --pf-bg-base: oklch(12% 0.03 var(--pf-hue-primary));
    --pf-bg-elevated: oklch(16% 0.03 var(--pf-hue-primary));
    --pf-bg-surface: oklch(20% 0.025 var(--pf-hue-primary));
    --pf-bg-glass: oklch(18% 0.02 var(--pf-hue-primary) / 0.65);
    --pf-bg-overlay: oklch(10% 0.02 var(--pf-hue-primary) / 0.85);

    --pf-primary: oklch(58% 0.22 var(--pf-hue-primary));
    --pf-primary-bright: oklch(68% 0.24 var(--pf-hue-primary));
    --pf-primary-muted: oklch(42% 0.18 var(--pf-hue-primary));
    --pf-primary-glow: oklch(62% 0.26 var(--pf-hue-primary) / 0.5);

    --pf-accent: oklch(78% 0.16 var(--pf-hue-accent));
    --pf-accent-bright: oklch(85% 0.18 var(--pf-hue-accent));
    --pf-accent-glow: oklch(80% 0.18 var(--pf-hue-accent) / 0.4);

    --pf-success: oklch(62% 0.18 145);
    --pf-error: oklch(58% 0.22 25);
    --pf-info: oklch(65% 0.15 230);
    --pf-warning: oklch(70% 0.16 65);

    --pf-text-primary: oklch(92% 0.01 var(--pf-hue-primary));
    --pf-text-secondary: oklch(72% 0.02 var(--pf-hue-primary));
    --pf-text-muted: oklch(52% 0.02 var(--pf-hue-primary));
    --pf-text-on-primary: oklch(98% 0.005 var(--pf-hue-primary));

    --pf-border-subtle: oklch(40% 0.04 var(--pf-hue-primary) / 0.3);
    --pf-border-strong: oklch(50% 0.08 var(--pf-hue-primary) / 0.5);
    --pf-border-accent: oklch(60% 0.18 var(--pf-hue-primary) / 0.6);
    --pf-border-glass: oklch(80% 0.05 var(--pf-hue-primary) / 0.12);

    /* ── Typography (Modular Scale 1.2) ── */
    --pf-font-family: 'Inter', system-ui, -apple-system, sans-serif;
    --pf-font-mono: 'SF Mono', 'Cascadia Code', 'Fira Code', monospace;
    --pf-font-size-xs: clamp(0.625rem, 1.5vw, 0.7rem);
    --pf-font-size-sm: clamp(0.75rem, 1.8vw, 0.833rem);
    --pf-font-size-base: clamp(0.875rem, 2vw, 1rem);
    --pf-font-size-md: clamp(1rem, 2.5vw, 1.2rem);
    --pf-font-size-lg: clamp(1.2rem, 3vw, 1.44rem);
    --pf-font-size-xl: clamp(1.44rem, 4vw, 1.728rem);
    --pf-font-size-2xl: clamp(1.728rem, 5vw, 2.074rem);
    --pf-font-size-3xl: clamp(2.074rem, 6vw, 2.488rem);
    --pf-font-size-4xl: clamp(2.488rem, 8vw, 3.583rem);

    --pf-font-weight-light: 300;
    --pf-font-weight-regular: 400;
    --pf-font-weight-medium: 500;
    --pf-font-weight-semibold: 600;
    --pf-font-weight-bold: 700;
    --pf-font-weight-black: 900;

    --pf-line-height-tight: 1.15;
    --pf-line-height-normal: 1.5;
    --pf-line-height-relaxed: 1.75;

    --pf-letter-spacing-tight: -0.025em;
    --pf-letter-spacing-wide: 0.05em;
    --pf-letter-spacing-wider: 0.12em;

    /* ── Spacing (4px grid) ── */
    --pf-space-0: 0;
    --pf-space-1: 0.25rem;
    --pf-space-2: 0.5rem;
    --pf-space-3: 0.75rem;
    --pf-space-4: 1rem;
    --pf-space-5: 1.25rem;
    --pf-space-6: 1.5rem;
    --pf-space-8: 2rem;
    --pf-space-10: 2.5rem;
    --pf-space-12: 3rem;
    --pf-space-16: 4rem;
    --pf-space-20: 5rem;
    --pf-space-24: 6rem;

    /* ── Radii ── */
    --pf-radius-xs: 0.25rem;
    --pf-radius-sm: 0.5rem;
    --pf-radius-md: 0.75rem;
    --pf-radius-lg: 1rem;
    --pf-radius-xl: 1.5rem;
    --pf-radius-2xl: 2rem;
    --pf-radius-full: 9999px;

    /* ── Shadows ── */
    --pf-shadow-sm: 0 1px 3px oklch(0% 0 0 / 0.3);
    --pf-shadow-md: 0 4px 12px oklch(0% 0 0 / 0.4);
    --pf-shadow-lg: 0 8px 32px oklch(0% 0 0 / 0.5);
    --pf-shadow-xl: 0 16px 48px oklch(0% 0 0 / 0.6);
    --pf-shadow-glow-primary: 0 0 24px var(--pf-primary-glow);
    --pf-shadow-glow-accent: 0 0 20px var(--pf-accent-glow);
    --pf-shadow-inner-highlight: inset 0 1px 0 oklch(100% 0 0 / 0.06);

    /* ── Transitions ── */
    --pf-ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --pf-ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
    --pf-ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
    --pf-duration-fast: 150ms;
    --pf-duration-normal: 300ms;
    --pf-duration-slow: 500ms;
    --pf-duration-slower: 800ms;

    /* ── Z-Index Scale ── */
    --pf-z-base: 0;
    --pf-z-dropdown: 100;
    --pf-z-sticky: 200;
    --pf-z-dock: 300;
    --pf-z-overlay: 400;
    --pf-z-modal: 500;
    --pf-z-toast: 600;
    --pf-z-tooltip: 700;

    /* ── Layout ── */
    --pf-header-height: 3.5rem;
    --pf-dock-height: 4rem;
    --pf-content-max: 48rem;
    --pf-grid-gap: var(--pf-space-4);
    --pf-section-gap: var(--pf-space-8);
  }
}

/* ═══════════════════════════════════════════════════════════════════════════
   LAYER 2 · CSS RESET
   ═══════════════════════════════════════════════════════════════════════════ */
@layer pf-reset {
  *,
  *::before,
  *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }

  html {
    -webkit-text-size-adjust: 100%;
    -moz-text-size-adjust: 100%;
    text-size-adjust: 100%;
    scroll-behavior: smooth;
    -webkit-tap-highlight-color: transparent;
  }

  body {
    min-height: 100dvh;
    font-family: var(--pf-font-family);
    font-size: var(--pf-font-size-base);
    line-height: var(--pf-line-height-normal);
    color: var(--pf-text-primary);
    background: var(--pf-bg-deep);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
  }

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

  button, input, select, textarea {
    font: inherit;
    color: inherit;
  }

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

  ul, ol {
    list-style: none;
  }

  h1, h2, h3, h4, h5, h6 {
    font-weight: var(--pf-font-weight-bold);
    line-height: var(--pf-line-height-tight);
    letter-spacing: var(--pf-letter-spacing-tight);
  }

  ::selection {
    background: var(--pf-primary-muted);
    color: var(--pf-text-primary);
  }
}

/* ═══════════════════════════════════════════════════════════════════════════
   LAYER 3 · BASE ELEMENTS
   ═══════════════════════════════════════════════════════════════════════════ */
@layer pf-base {
  /* ── Focus Visible ── */
  :focus-visible {
    outline: 2px solid var(--pf-primary-bright);
    outline-offset: 2px;
    border-radius: var(--pf-radius-sm);
  }

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

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

  ::-webkit-scrollbar-thumb {
    background: oklch(40% 0.04 var(--pf-hue-primary) / 0.5);
    border-radius: var(--pf-radius-full);
  }

  ::-webkit-scrollbar-thumb:hover {
    background: oklch(50% 0.06 var(--pf-hue-primary) / 0.7);
  }

  /* ── Selection accent ── */
  ::selection {
    background: var(--pf-primary-muted);
  }

  /* ── 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;
    }
  }
}

/* ═══════════════════════════════════════════════════════════════════════════
   LAYER 4 · AMBIENT BACKGROUND / PARTICLES
   ═══════════════════════════════════════════════════════════════════════════ */
@layer pf-base {
  .pf-ambient {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: var(--pf-z-base);
    overflow: hidden;
    contain: strict;
  }

  /* Radial gradient orbs — CSS-only floating ambient */
  .pf-ambient::before {
    content: '';
    position: absolute;
    top: -30%;
    left: -20%;
    width: 140%;
    height: 140%;
    background:
      radial-gradient(ellipse 40% 50% at 30% 20%, var(--pf-primary-glow), transparent 60%),
      radial-gradient(ellipse 30% 40% at 70% 70%, var(--pf-accent-glow), transparent 55%),
      radial-gradient(ellipse 25% 30% at 80% 15%, oklch(65% 0.15 300 / 0.25), transparent 50%),
      radial-gradient(ellipse 20% 25% at 20% 85%, oklch(55% 0.2 190 / 0.2), transparent 50%);
    animation: pf-ambient-drift 20s var(--pf-ease-in-out) infinite alternate;
    will-change: transform;
  }

  .pf-ambient::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
      radial-gradient(1px 1px at 12% 18%, oklch(100% 0 0 / 0.4), transparent),
      radial-gradient(1px 1px at 25% 42%, oklch(100% 0 0 / 0.3), transparent),
      radial-gradient(1.5px 1.5px at 38% 8%, oklch(100% 0 0 / 0.5), transparent),
      radial-gradient(1px 1px at 52% 35%, oklch(100% 0 0 / 0.35), transparent),
      radial-gradient(1.5px 1.5px at 67% 15%, oklch(100% 0 0 / 0.4), transparent),
      radial-gradient(1px 1px at 78% 55%, oklch(100% 0 0 / 0.3), transparent),
      radial-gradient(1px 1px at 85% 72%, oklch(100% 0 0 / 0.35), transparent),
      radial-gradient(1.5px 1.5px at 15% 78%, oklch(100% 0 0 / 0.4), transparent),
      radial-gradient(1px 1px at 92% 28%, oklch(100% 0 0 / 0.3), transparent),
      radial-gradient(1px 1px at 45% 65%, oklch(100% 0 0 / 0.35), transparent);
    animation: pf-particles-float 12s var(--pf-ease-in-out) infinite alternate;
  }

  /* ── Noise overlay for depth ── */
  .pf-noise-overlay {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 1;
    opacity: 0.03;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
    background-repeat: repeat;
    background-size: 256px 256px;
  }
}

/* ═══════════════════════════════════════════════════════════════════════════
   LAYER 5 · APP SHELL LAYOUT
   ═══════════════════════════════════════════════════════════════════════════ */
@layer pf-layout {
  .pf-app {
    display: flex;
    flex-direction: column;
    min-height: 100dvh;
    position: relative;
    z-index: var(--pf-z-base);
  }

  /* ── Header (Glass) ── */
  .pf-header {
    position: sticky;
    top: 0;
    z-index: var(--pf-z-sticky);
    height: var(--pf-header-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--pf-space-4);
    background: var(--pf-bg-glass);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--pf-border-glass);
    box-shadow: var(--pf-shadow-inner-highlight), 0 1px 8px oklch(0% 0 0 / 0.3);
    contain: layout style;
  }

  .pf-header__brand {
    display: flex;
    align-items: center;
    gap: var(--pf-space-3);
    font-size: var(--pf-font-size-lg);
    font-weight: var(--pf-font-weight-bold);
    letter-spacing: var(--pf-letter-spacing-tight);
  }

  .pf-header__logo {
    width: 2rem;
    height: 2rem;
    border-radius: var(--pf-radius-md);
    background: linear-gradient(135deg, var(--pf-primary), var(--pf-accent));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    box-shadow: var(--pf-shadow-glow-primary);
  }

  .pf-header__actions {
    display: flex;
    align-items: center;
    gap: var(--pf-space-2);
  }

  /* ── Main Content Area ── */
  .pf-main {
    flex: 1;
    padding: var(--pf-space-4);
    padding-bottom: calc(var(--pf-dock-height) + var(--pf-space-8));
    max-width: var(--pf-content-max);
    width: 100%;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--pf-section-gap);
    contain: layout style;
    content-visibility: auto;
  }

  /* ── Sections ── */
  .pf-section {
    display: flex;
    flex-direction: column;
    gap: var(--pf-space-4);
  }

  .pf-section__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--pf-space-3);
  }

  .pf-section__title {
    font-size: var(--pf-font-size-lg);
    font-weight: var(--pf-font-weight-semibold);
    color: var(--pf-text-primary);
    letter-spacing: var(--pf-letter-spacing-tight);
  }

  .pf-section__subtitle {
    font-size: var(--pf-font-size-sm);
    color: var(--pf-text-muted);
  }

  .pf-section__action {
    font-size: var(--pf-font-size-sm);
    color: var(--pf-primary-bright);
    font-weight: var(--pf-font-weight-medium);
    cursor: pointer;
    transition: color var(--pf-duration-fast) var(--pf-ease-out);
  }

  .pf-section__action:hover {
    color: var(--pf-accent);
  }
}

/* ═══════════════════════════════════════════════════════════════════════════
   LAYER 6 · BOTTOM DOCK NAVIGATION
   ═══════════════════════════════════════════════════════════════════════════ */
@layer pf-components {
  .pf-dock {
    position: fixed;
    bottom: var(--pf-space-3);
    left: 50%;
    transform: translateX(-50%);
    z-index: var(--pf-z-dock);
    display: flex;
    align-items: center;
    gap: var(--pf-space-1);
    padding: var(--pf-space-1) var(--pf-space-2);
    background: var(--pf-bg-glass);
    backdrop-filter: blur(24px) saturate(200%);
    -webkit-backdrop-filter: blur(24px) saturate(200%);
    border: 1px solid var(--pf-border-glass);
    border-radius: var(--pf-radius-2xl);
    box-shadow: var(--pf-shadow-lg), var(--pf-shadow-inner-highlight);
    contain: layout style paint;
    max-width: calc(100vw - var(--pf-space-4));
    overflow-x: auto;
    scrollbar-width: none;
  }

  .pf-dock::-webkit-scrollbar { display: none; }

  .pf-dock__item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    min-width: 3.5rem;
    padding: var(--pf-space-2) var(--pf-space-3);
    border-radius: var(--pf-radius-xl);
    border: none;
    background: transparent;
    cursor: pointer;
    color: var(--pf-text-muted);
    font-size: var(--pf-font-size-xs);
    font-weight: var(--pf-font-weight-medium);
    transition:
      color var(--pf-duration-normal) var(--pf-ease-out),
      background var(--pf-duration-normal) var(--pf-ease-out),
      transform var(--pf-duration-normal) var(--pf-ease-spring);
    position: relative;
    outline: none;
    -webkit-tap-highlight-color: transparent;
    user-select: none;
    white-space: nowrap;
  }

  .pf-dock__item:focus-visible {
    outline: 2px solid var(--pf-primary-bright);
    outline-offset: -2px;
    border-radius: var(--pf-radius-xl);
  }

  .pf-dock__item:hover {
    color: var(--pf-text-secondary);
  }

  .pf-dock__item:active {
    transform: scale(0.92);
  }

  .pf-dock__item--active {
    color: var(--pf-primary-bright);
    background: oklch(50% 0.2 var(--pf-hue-primary) / 0.15);
    box-shadow: var(--pf-shadow-glow-primary);
  }

  .pf-dock__item--active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 1.25rem;
    height: 3px;
    background: var(--pf-primary-bright);
    border-radius: var(--pf-radius-full);
    box-shadow: 0 0 8px var(--pf-primary-glow);
  }

  .pf-dock__icon {
    font-size: 1.35rem;
    line-height: 1;
    transition: transform var(--pf-duration-normal) var(--pf-ease-spring);
  }

  .pf-dock__item--active .pf-dock__icon {
    transform: translateY(-2px);
  }

  .pf-dock__label {
    font-size: 0.625rem;
    font-weight: var(--pf-font-weight-semibold);
    letter-spacing: var(--pf-letter-spacing-wide);
    text-transform: uppercase;
  }

  /* ── Ripple container ── */
  .pf-dock__item {
    overflow: hidden;
  }

  .pf-ripple {
    position: absolute;
    border-radius: 50%;
    background: oklch(100% 0 0 / 0.3);
    transform: scale(0);
    animation: pf-ripple-effect 0.6s var(--pf-ease-out);
    pointer-events: none;
  }
}

/* ═══════════════════════════════════════════════════════════════════════════
   LAYER 7 · CARDS
   ═══════════════════════════════════════════════════════════════════════════ */
@layer pf-components {
  /* ── Session Card ── */
  .pf-card {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: var(--pf-space-3);
    padding: var(--pf-space-4);
    background: var(--pf-bg-glass);
    backdrop-filter: blur(16px) saturate(160%);
    -webkit-backdrop-filter: blur(16px) saturate(160%);
    border: 1px solid var(--pf-border-glass);
    border-radius: var(--pf-radius-lg);
    box-shadow: var(--pf-shadow-md), var(--pf-shadow-inner-highlight);
    transition:
      transform var(--pf-duration-normal) var(--pf-ease-out),
      box-shadow var(--pf-duration-normal) var(--pf-ease-out),
      border-color var(--pf-duration-normal) var(--pf-ease-out);
    cursor: pointer;
    contain: layout style paint;
    will-change: transform;
    overflow: hidden;
  }

  .pf-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--pf-shadow-lg), var(--pf-shadow-inner-highlight);
    border-color: var(--pf-border-subtle);
  }

  .pf-card:active {
    transform: scale(0.97);
  }

  .pf-card__media {
    width: 100%;
    aspect-ratio: 16 / 9;
    border-radius: var(--pf-radius-md);
    overflow: hidden;
    background: var(--pf-bg-surface);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    position: relative;
  }

  .pf-card__media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }

  .pf-card__emoji {
    font-size: 3rem;
    line-height: 1;
  }

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

  .pf-card__title {
    font-size: var(--pf-font-size-md);
    font-weight: var(--pf-font-weight-semibold);
    color: var(--pf-text-primary);
    line-height: var(--pf-line-height-tight);
  }

  .pf-card__desc {
    font-size: var(--pf-font-size-sm);
    color: var(--pf-text-secondary);
    line-height: var(--pf-line-height-relaxed);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .pf-card__meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--pf-space-3);
  }

  .pf-card__duration {
    font-size: var(--pf-font-size-xs);
    color: var(--pf-text-muted);
    display: flex;
    align-items: center;
    gap: var(--pf-space-1);
  }

  .pf-card__badge {
    display: inline-flex;
    align-items: center;
    gap: var(--pf-space-1);
    padding: var(--pf-space-1) var(--pf-space-3);
    font-size: var(--pf-font-size-xs);
    font-weight: var(--pf-font-weight-semibold);
    border-radius: var(--pf-radius-full);
    text-transform: uppercase;
    letter-spacing: var(--pf-letter-spacing-wide);
  }

  .pf-badge--primary {
    background: oklch(55% 0.2 var(--pf-hue-primary) / 0.2);
    color: var(--pf-primary-bright);
    border: 1px solid oklch(55% 0.2 var(--pf-hue-primary) / 0.3);
  }

  .pf-badge--accent {
    background: oklch(75% 0.15 var(--pf-hue-accent) / 0.15);
    color: var(--pf-accent);
    border: 1px solid oklch(75% 0.15 var(--pf-hue-accent) / 0.3);
  }

  .pf-badge--success {
    background: oklch(60% 0.18 145 / 0.15);
    color: var(--pf-success);
    border: 1px solid oklch(60% 0.18 145 / 0.3);
  }

  .pf-badge--new {
    position: absolute;
    top: var(--pf-space-3);
    right: var(--pf-space-3);
    z-index: 2;
  }

  /* ── Card Grid Container ── */
  .pf-card-grid {
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    gap: var(--pf-grid-gap);
  }

  @container (min-width: 480px) {
    .pf-card-grid { grid-template-columns: repeat(2, 1fr); }
  }

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

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

  /* ── Horizontal scrollable row ── */
  .pf-card-row {
    display: flex;
    gap: var(--pf-space-4);
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    padding-bottom: var(--pf-space-2);
    scrollbar-width: none;
  }

  .pf-card-row::-webkit-scrollbar { display: none; }

  .pf-card-row .pf-card {
    flex: 0 0 85%;
    max-width: 320px;
    scroll-snap-align: start;
  }

  @media (min-width: 768px) {
    .pf-card-row .pf-card { flex: 0 0 45%; }
  }
}

/* ═══════════════════════════════════════════════════════════════════════════
   LAYER 8 · AMBIENT SOUND GRID
   ═══════════════════════════════════════════════════════════════════════════ */
@layer pf-components {
  .pf-sound-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--pf-space-3);
  }

  @media (min-width: 1024px) {
    .pf-sound-grid { grid-template-columns: repeat(8, 1fr); }
  }

  .pf-sound-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--pf-space-2);
    padding: var(--pf-space-3);
    background: var(--pf-bg-surface);
    border: 1px solid var(--pf-border-subtle);
    border-radius: var(--pf-radius-md);
    cursor: pointer;
    transition:
      background var(--pf-duration-normal) var(--pf-ease-out),
      border-color var(--pf-duration-normal) var(--pf-ease-out),
      transform var(--pf-duration-normal) var(--pf-ease-out),
      box-shadow var(--pf-duration-normal) var(--pf-ease-out);
    contain: layout style;
    user-select: none;
    position: relative;
  }

  .pf-sound-card:hover {
    border-color: var(--pf-border-strong);
    transform: translateY(-2px);
    box-shadow: var(--pf-shadow-md);
  }

  .pf-sound-card:active {
    transform: scale(0.95);
  }

  .pf-sound-card--active {
    background: oklch(40% 0.08 var(--pf-hue-primary) / 0.3);
    border-color: var(--pf-border-accent);
    box-shadow: var(--pf-shadow-glow-primary);
  }

  .pf-sound-card__icon {
    font-size: 1.75rem;
    transition: transform var(--pf-duration-normal) var(--pf-ease-spring);
  }

  .pf-sound-card--active .pf-sound-card__icon {
    transform: scale(1.15);
  }

  .pf-sound-card__name {
    font-size: var(--pf-font-size-xs);
    font-weight: var(--pf-font-weight-medium);
    color: var(--pf-text-secondary);
    text-align: center;
    line-height: 1.3;
  }

  .pf-sound-card--active .pf-sound-card__name {
    color: var(--pf-primary-bright);
  }

  /* ── Toggle indicator ── */
  .pf-sound-card__toggle {
    width: 0.5rem;
    height: 0.5rem;
    border-radius: var(--pf-radius-full);
    background: var(--pf-text-muted);
    transition:
      background var(--pf-duration-normal) var(--pf-ease-out),
      box-shadow var(--pf-duration-normal) var(--pf-ease-out);
  }

  .pf-sound-card--active .pf-sound-card__toggle {
    background: var(--pf-success);
    box-shadow: 0 0 8px var(--pf-success);
  }
}

/* ═══════════════════════════════════════════════════════════════════════════
   LAYER 9 · BINAURAL SELECTOR
   ═══════════════════════════════════════════════════════════════════════════ */
@layer pf-components {
  .pf-binaural-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--pf-space-3);
  }

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

  .pf-binaural-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--pf-space-2);
    padding: var(--pf-space-4) var(--pf-space-3);
    background: var(--pf-bg-surface);
    border: 1px solid var(--pf-border-subtle);
    border-radius: var(--pf-radius-lg);
    cursor: pointer;
    transition:
      background var(--pf-duration-normal) var(--pf-ease-out),
      border-color var(--pf-duration-normal) var(--pf-ease-out),
      transform var(--pf-duration-normal) var(--pf-ease-out),
      box-shadow var(--pf-duration-normal) var(--pf-ease-out);
    contain: layout style;
    user-select: none;
    position: relative;
  }

  .pf-binaural-card:hover {
    border-color: var(--pf-border-strong);
    transform: translateY(-2px);
  }

  .pf-binaural-card--active {
    background: linear-gradient(135deg, oklch(35% 0.1 var(--pf-hue-primary) / 0.4), oklch(25% 0.08 260 / 0.25));
    border-color: var(--pf-border-accent);
    box-shadow: var(--pf-shadow-glow-primary), var(--pf-shadow-inner-highlight);
  }

  .pf-binaural-card__icon {
    font-size: 2rem;
  }

  .pf-binaural-card__name {
    font-size: var(--pf-font-size-sm);
    font-weight: var(--pf-font-weight-semibold);
    color: var(--pf-text-primary);
    text-align: center;
  }

  .pf-binaural-card__freq {
    font-size: var(--pf-font-size-xs);
    font-weight: var(--pf-font-weight-medium);
    color: var(--pf-text-muted);
    font-family: var(--pf-font-mono);
    letter-spacing: var(--pf-letter-spacing-wide);
  }

  .pf-binaural-card--active .pf-binaural-card__freq {
    color: var(--pf-accent);
  }
}

/* ═══════════════════════════════════════════════════════════════════════════
   LAYER 10 · VOICE CHIPS
   ═══════════════════════════════════════════════════════════════════════════ */
@layer pf-components {
  .pf-voice-chips {
    display: flex;
    gap: var(--pf-space-2);
    overflow-x: auto;
    padding-bottom: var(--pf-space-2);
    scrollbar-width: none;
    scroll-snap-type: x proximity;
  }

  .pf-voice-chips::-webkit-scrollbar { display: none; }

  .pf-chip {
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    gap: var(--pf-space-2);
    padding: var(--pf-space-2) var(--pf-space-4);
    background: var(--pf-bg-surface);
    border: 1px solid var(--pf-border-subtle);
    border-radius: var(--pf-radius-full);
    font-size: var(--pf-font-size-sm);
    font-weight: var(--pf-font-weight-medium);
    color: var(--pf-text-secondary);
    cursor: pointer;
    transition:
      background var(--pf-duration-normal) var(--pf-ease-out),
      border-color var(--pf-duration-normal) var(--pf-ease-out),
      color var(--pf-duration-normal) var(--pf-ease-out),
      box-shadow var(--pf-duration-normal) var(--pf-ease-out),
      transform var(--pf-duration-normal) var(--pf-ease-out);
    white-space: nowrap;
    user-select: none;
    scroll-snap-align: start;
  }

  .pf-chip:hover {
    border-color: var(--pf-border-strong);
    color: var(--pf-text-primary);
  }

  .pf-chip:active {
    transform: scale(0.95);
  }

  .pf-chip--active {
    background: linear-gradient(135deg, var(--pf-primary-muted), oklch(45% 0.15 290));
    border-color: var(--pf-border-accent);
    color: var(--pf-text-on-primary);
    box-shadow: var(--pf-shadow-glow-primary);
    font-weight: var(--pf-font-weight-semibold);
  }

  .pf-chip__icon {
    font-size: 1.1rem;
    line-height: 1;
  }
}

/* ═══════════════════════════════════════════════════════════════════════════
   LAYER 11 · PLAYER — CENTRAL PULSING ORB
   ═══════════════════════════════════════════════════════════════════════════ */
@layer pf-components {
  .pf-player {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--pf-space-6);
    padding: var(--pf-space-6) 0;
    contain: layout style;
  }

  /* ── Pulsing circle ── */
  .pf-player__orb {
    position: relative;
    width: 10rem;
    height: 10rem;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  @media (min-width: 768px) {
    .pf-player__orb {
      width: 12rem;
      height: 12rem;
    }
  }

  .pf-player__orb-inner {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: radial-gradient(circle at 40% 35%, var(--pf-primary-bright), var(--pf-primary-muted) 60%, var(--pf-bg-deep) 100%);
    box-shadow: 0 0 60px var(--pf-primary-glow), 0 0 120px oklch(55% 0.22 270 / 0.25);
    animation: pf-orb-pulse 2.5s var(--pf-ease-in-out) infinite;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: 2;
  }

  .pf-player__orb-ring {
    position: absolute;
    inset: -8px;
    border-radius: 50%;
    border: 2px solid var(--pf-primary-glow);
    opacity: 0.6;
    animation: pf-orb-ring 2.5s var(--pf-ease-in-out) infinite;
  }

  .pf-player__orb-ring:nth-child(2) {
    inset: -20px;
    border-width: 1px;
    opacity: 0.3;
    animation-delay: 0.3s;
  }

  .pf-player__orb-ring:nth-child(3) {
    inset: -36px;
    border-width: 0.5px;
    opacity: 0.15;
    animation-delay: 0.6s;
  }

  .pf-player__orb-emoji {
    font-size: 2.5rem;
    z-index: 3;
    animation: pf-orb-pulse 2.5s var(--pf-ease-in-out) infinite;
    filter: drop-shadow(0 0 8px oklch(100% 0 0 / 0.3));
  }

  @media (min-width: 768px) {
    .pf-player__orb-emoji { font-size: 3rem; }
  }

  /* ── Timer ── */
  .pf-player__timer {
    font-size: var(--pf-font-size-lg);
    font-weight: var(--pf-font-weight-semibold);
    color: var(--pf-text-primary);
    font-variant-numeric: tabular-nums;
    font-family: var(--pf-font-mono);
    letter-spacing: var(--pf-letter-spacing-wide);
  }

  /* ── Progress bar ── */
  .pf-player__progress {
    width: 100%;
    max-width: 24rem;
  }

  .pf-progress {
    display: flex;
    flex-direction: column;
    gap: var(--pf-space-1);
  }

  .pf-progress__track {
    height: 4px;
    background: oklch(30% 0.02 var(--pf-hue-primary) / 0.5);
    border-radius: var(--pf-radius-full);
    overflow: hidden;
    cursor: pointer;
    position: relative;
  }

  .pf-progress__fill {
    height: 100%;
    background: linear-gradient(90deg, var(--pf-primary), var(--pf-accent));
    border-radius: var(--pf-radius-full);
    width: 45%;
    transition: width var(--pf-duration-slow) var(--pf-ease-out);
    position: relative;
  }

  .pf-progress__fill::after {
    content: '';
    position: absolute;
    right: 0;
    top: 50%;
    transform: translate(50%, -50%);
    width: 12px;
    height: 12px;
    background: var(--pf-accent);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--pf-accent-glow);
    opacity: 0;
    transition: opacity var(--pf-duration-fast) var(--pf-ease-out);
  }

  .pf-progress__track:hover .pf-progress__fill::after,
  .pf-progress__track:active .pf-progress__fill::after {
    opacity: 1;
  }

  .pf-progress__labels {
    display: flex;
    justify-content: space-between;
    font-size: var(--pf-font-size-xs);
    color: var(--pf-text-muted);
    font-variant-numeric: tabular-nums;
  }

  /* ── Controls ── */
  .pf-player__controls {
    display: flex;
    align-items: center;
    gap: var(--pf-space-4);
  }
}

/* ═══════════════════════════════════════════════════════════════════════════
   LAYER 12 · SLIDERS
   ═══════════════════════════════════════════════════════════════════════════ */
@layer pf-components {
  .pf-slider-group {
    display: flex;
    flex-direction: column;
    gap: var(--pf-space-2);
  }

  .pf-slider-group__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
  }

  .pf-slider-group__label {
    font-size: var(--pf-font-size-sm);
    font-weight: var(--pf-font-weight-medium);
    color: var(--pf-text-secondary);
    display: flex;
    align-items: center;
    gap: var(--pf-space-2);
  }

  .pf-slider-group__icon {
    font-size: 1.1rem;
  }

  .pf-slider-group__value {
    font-size: var(--pf-font-size-sm);
    color: var(--pf-text-muted);
    font-family: var(--pf-font-mono);
  }

  /* ── Custom range input ── */
  .pf-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    background: oklch(30% 0.03 var(--pf-hue-primary));
    border-radius: var(--pf-radius-full);
    outline: none;
    cursor: pointer;
  }

  .pf-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 1.25rem;
    height: 1.25rem;
    border-radius: 50%;
    background: var(--pf-primary-bright);
    border: 2px solid var(--pf-bg-deep);
    box-shadow: 0 0 12px var(--pf-primary-glow), 0 2px 8px oklch(0% 0 0 / 0.4);
    cursor: pointer;
    transition:
      transform var(--pf-duration-fast) var(--pf-ease-out),
      box-shadow var(--pf-duration-fast) var(--pf-ease-out);
  }

  .pf-slider::-webkit-slider-thumb:hover {
    transform: scale(1.15);
  }

  .pf-slider::-webkit-slider-thumb:active {
    transform: scale(1.25);
    box-shadow: 0 0 20px var(--pf-primary-glow), 0 2px 12px oklch(0% 0 0 / 0.5);
  }

  .pf-slider::-moz-range-thumb {
    width: 1.25rem;
    height: 1.25rem;
    border-radius: 50%;
    background: var(--pf-primary-bright);
    border: 2px solid var(--pf-bg-deep);
    box-shadow: 0 0 12px var(--pf-primary-glow), 0 2px 8px oklch(0% 0 0 / 0.4);
    cursor: pointer;
    transition: transform var(--pf-duration-fast) var(--pf-ease-out);
  }

  .pf-slider::-moz-range-thumb:hover { transform: scale(1.15); }

  .pf-slider:focus-visible::-webkit-slider-thumb {
    outline: 2px solid var(--pf-primary-bright);
    outline-offset: 4px;
  }

  .pf-slider:focus-visible::-moz-range-thumb {
    outline: 2px solid var(--pf-primary-bright);
    outline-offset: 4px;
  }

  /* ── Volume slider variant ── */
  .pf-slider--volume {
    background: linear-gradient(90deg, var(--pf-success) 0%, var(--pf-success) var(--pf-slider-pct, 60%), oklch(30% 0.03 var(--pf-hue-primary)) var(--pf-slider-pct, 60%));
  }

  /* ── Colored slider tracks ── */
  .pf-slider--voice {
    background: linear-gradient(90deg, var(--pf-primary) 0%, var(--pf-primary) var(--pf-slider-pct, 60%), oklch(30% 0.03 var(--pf-hue-primary)) var(--pf-slider-pct, 60%));
  }

  .pf-slider--binaural {
    background: linear-gradient(90deg, oklch(65% 0.15 260) 0%, oklch(65% 0.15 260) var(--pf-slider-pct, 60%), oklch(30% 0.03 var(--pf-hue-primary)) var(--pf-slider-pct, 60%));
  }

  .pf-slider--ambient {
    background: linear-gradient(90deg, var(--pf-accent) 0%, var(--pf-accent) var(--pf-slider-pct, 60%), oklch(30% 0.03 var(--pf-hue-primary)) var(--pf-slider-pct, 60%));
  }
}

/* ═══════════════════════════════════════════════════════════════════════════
   LAYER 13 · RECORDER BUTTON
   ═══════════════════════════════════════════════════════════════════════════ */
@layer pf-components {
  .pf-recorder {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--pf-space-4);
    padding: var(--pf-space-4);
  }

  .pf-recorder__btn {
    width: 4.5rem;
    height: 4.5rem;
    border-radius: 50%;
    border: 3px solid oklch(55% 0.22 25 / 0.6);
    background: radial-gradient(circle at 40% 35%, oklch(60% 0.24 25), oklch(42% 0.2 22));
    box-shadow: 0 0 32px oklch(55% 0.22 25 / 0.5), inset 0 2px 4px oklch(70% 0.2 25 / 0.4);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition:
      transform var(--pf-duration-fast) var(--pf-ease-out),
      box-shadow var(--pf-duration-fast) var(--pf-ease-out);
    position: relative;
  }

  .pf-recorder__btn:hover {
    transform: scale(1.08);
    box-shadow: 0 0 48px oklch(55% 0.22 25 / 0.6), inset 0 2px 4px oklch(70% 0.2 25 / 0.4);
  }

  .pf-recorder__btn:active {
    transform: scale(0.95);
  }

  .pf-recorder__btn--recording {
    background: oklch(55% 0.24 25);
    box-shadow: 0 0 40px oklch(55% 0.22 25 / 0.7), inset 0 1px 3px oklch(70% 0.2 25 / 0.5);
    animation: pf-rec-pulse 1.2s var(--pf-ease-in-out) infinite;
  }

  .pf-recorder__btn--recording::after {
    content: '';
    position: absolute;
    inset: -6px;
    border-radius: 50%;
    border: 2px solid oklch(55% 0.2 25 / 0.5);
    animation: pf-rec-ring 1.2s var(--pf-ease-out) infinite;
  }

  .pf-recorder__icon {
    width: 1.5rem;
    height: 1.5rem;
    border-radius: 50%;
    background: oklch(100% 0 0 / 0.9);
    transition: border-radius var(--pf-duration-fast) var(--pf-ease-out);
  }

  .pf-recorder__btn--recording .pf-recorder__icon {
    border-radius: var(--pf-radius-sm);
  }

  .pf-recorder__status {
    font-size: var(--pf-font-size-sm);
    font-weight: var(--pf-font-weight-medium);
    color: var(--pf-text-muted);
    text-align: center;
    transition: color var(--pf-duration-fast) var(--pf-ease-out);
  }

  .pf-recorder__btn--recording + .pf-recorder__status,
  .pf-recorder__btn--recording ~ .pf-recorder__status {
    color: var(--pf-error);
    font-weight: var(--pf-font-weight-semibold);
    animation: pf-text-blink 1.2s var(--pf-ease-in-out) infinite;
  }

  .pf-recorder__timer {
    font-size: var(--pf-font-size-md);
    font-family: var(--pf-font-mono);
    color: var(--pf-text-primary);
    font-variant-numeric: tabular-nums;
  }
}

/* ═══════════════════════════════════════════════════════════════════════════
   LAYER 14 · STATS GRID
   ═══════════════════════════════════════════════════════════════════════════ */
@layer pf-components {
  .pf-stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--pf-space-3);
  }

  @media (min-width: 768px) {
    .pf-stats-grid {
      grid-template-columns: repeat(3, 1fr);
      gap: var(--pf-space-4);
    }
  }

  .pf-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--pf-space-1);
    padding: var(--pf-space-4) var(--pf-space-3);
    background: var(--pf-bg-glass);
    backdrop-filter: blur(12px) saturate(140%);
    -webkit-backdrop-filter: blur(12px) saturate(140%);
    border: 1px solid var(--pf-border-glass);
    border-radius: var(--pf-radius-lg);
    box-shadow: var(--pf-shadow-sm), var(--pf-shadow-inner-highlight);
    text-align: center;
    transition:
      transform var(--pf-duration-normal) var(--pf-ease-out),
      box-shadow var(--pf-duration-normal) var(--pf-ease-out);
  }

  .pf-stat:hover {
    transform: translateY(-2px);
    box-shadow: var(--pf-shadow-md), var(--pf-shadow-inner-highlight);
  }

  .pf-stat__value {
    font-size: var(--pf-font-size-2xl);
    font-weight: var(--pf-font-weight-black);
    color: var(--pf-text-primary);
    line-height: 1;
    letter-spacing: var(--pf-letter-spacing-tight);
    background: linear-gradient(135deg, var(--pf-primary-bright), var(--pf-accent));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
  }

  .pf-stat__label {
    font-size: var(--pf-font-size-xs);
    color: var(--pf-text-muted);
    font-weight: var(--pf-font-weight-medium);
    text-transform: uppercase;
    letter-spacing: var(--pf-letter-spacing-wider);
  }

  .pf-stat__trend {
    font-size: var(--pf-font-size-xs);
    font-weight: var(--pf-font-weight-semibold);
    display: flex;
    align-items: center;
    gap: 2px;
  }

  .pf-stat__trend--up { color: var(--pf-success); }
  .pf-stat__trend--down { color: var(--pf-error); }
  .pf-stat__trend--neutral { color: var(--pf-text-muted); }
}

/* ═══════════════════════════════════════════════════════════════════════════
   LAYER 15 · BUTTONS
   ═══════════════════════════════════════════════════════════════════════════ */
@layer pf-components {
  /* ── Primary (Gradient Violet) ── */
  .pf-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--pf-space-2);
    padding: var(--pf-space-3) var(--pf-space-6);
    font-size: var(--pf-font-size-sm);
    font-weight: var(--pf-font-weight-semibold);
    border: none;
    border-radius: var(--pf-radius-xl);
    cursor: pointer;
    transition:
      transform var(--pf-duration-fast) var(--pf-ease-out),
      box-shadow var(--pf-duration-fast) var(--pf-ease-out),
      filter var(--pf-duration-fast) var(--pf-ease-out);
    position: relative;
    overflow: hidden;
    user-select: none;
    white-space: nowrap;
    text-decoration: none;
    line-height: 1;
    letter-spacing: var(--pf-letter-spacing-tight);
  }

  .pf-btn:active {
    transform: scale(0.96);
  }

  .pf-btn--primary {
    background: linear-gradient(135deg, var(--pf-primary), oklch(55% 0.22 290));
    color: var(--pf-text-on-primary);
    box-shadow: 0 4px 16px oklch(55% 0.2 var(--pf-hue-primary) / 0.35), var(--pf-shadow-inner-highlight);
  }

  .pf-btn--primary:hover {
    box-shadow: 0 6px 24px oklch(55% 0.2 var(--pf-hue-primary) / 0.5), var(--pf-shadow-inner-highlight);
    filter: brightness(1.1);
  }

  .pf-btn--primary:active {
    filter: brightness(0.95);
    box-shadow: 0 2px 8px oklch(55% 0.2 var(--pf-hue-primary) / 0.25);
  }

  /* ── Secondary (Outline) ── */
  .pf-btn--secondary {
    background: transparent;
    color: var(--pf-primary-bright);
    border: 1.5px solid var(--pf-border-accent);
    box-shadow: var(--pf-shadow-inner-highlight);
  }

  .pf-btn--secondary:hover {
    background: oklch(50% 0.2 var(--pf-hue-primary) / 0.12);
    border-color: var(--pf-primary-bright);
    box-shadow: var(--pf-shadow-glow-primary);
  }

  .pf-btn--secondary:active {
    background: oklch(50% 0.2 var(--pf-hue-primary) / 0.2);
  }

  /* ── Icon Circle ── */
  .pf-btn--icon {
    width: 2.75rem;
    height: 2.75rem;
    padding: 0;
    border-radius: 50%;
    background: var(--pf-bg-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--pf-border-glass);
    color: var(--pf-text-secondary);
    font-size: 1.2rem;
    box-shadow: var(--pf-shadow-sm);
  }

  .pf-btn--icon:hover {
    color: var(--pf-text-primary);
    border-color: var(--pf-border-strong);
    box-shadow: var(--pf-shadow-md);
    transform: scale(1.05);
  }

  .pf-btn--icon:active {
    transform: scale(0.9);
  }

  /* ── Danger ── */
  .pf-btn--danger {
    background: linear-gradient(135deg, oklch(55% 0.22 25), oklch(42% 0.18 20));
    color: var(--pf-text-on-primary);
    box-shadow: 0 4px 16px oklch(55% 0.2 25 / 0.3);
  }

  .pf-btn--danger:hover {
    box-shadow: 0 6px 24px oklch(55% 0.2 25 / 0.45);
  }

  /* ── Sizes ── */
  .pf-btn--sm {
    padding: var(--pf-space-2) var(--pf-space-4);
    font-size: var(--pf-font-size-xs);
    border-radius: var(--pf-radius-lg);
  }

  .pf-btn--lg {
    padding: var(--pf-space-4) var(--pf-space-8);
    font-size: var(--pf-font-size-md);
    border-radius: var(--pf-radius-2xl);
  }

  /* ── Full width ── */
  .pf-btn--block {
    width: 100%;
  }

  /* ── Disabled ── */
  .pf-btn:disabled,
  .pf-btn[aria-disabled="true"] {
    opacity: 0.4;
    cursor: not-allowed;
    pointer-events: none;
  }
}

/* ═══════════════════════════════════════════════════════════════════════════
   LAYER 16 · TOAST NOTIFICATIONS
   ═══════════════════════════════════════════════════════════════════════════ */
@layer pf-components {
  .pf-toast-container {
    position: fixed;
    bottom: calc(var(--pf-dock-height) + var(--pf-space-8));
    left: 50%;
    transform: translateX(-50%);
    z-index: var(--pf-z-toast);
    display: flex;
    flex-direction: column-reverse;
    gap: var(--pf-space-2);
    width: calc(100vw - var(--pf-space-8));
    max-width: 28rem;
    pointer-events: none;
  }

  .pf-toast {
    display: flex;
    align-items: center;
    gap: var(--pf-space-3);
    padding: var(--pf-space-3) var(--pf-space-4);
    background: var(--pf-bg-glass);
    backdrop-filter: blur(20px) saturate(200%);
    -webkit-backdrop-filter: blur(20px) saturate(200%);
    border: 1px solid var(--pf-border-glass);
    border-radius: var(--pf-radius-xl);
    box-shadow: var(--pf-shadow-lg), var(--pf-shadow-inner-highlight);
    pointer-events: auto;
    animation: pf-toast-in 0.4s var(--pf-ease-spring);
    transition:
      opacity var(--pf-duration-normal) var(--pf-ease-out),
      transform var(--pf-duration-normal) var(--pf-ease-out);
  }

  .pf-toast--exit {
    opacity: 0;
    transform: translateY(12px) scale(0.95);
  }

  .pf-toast__icon {
    flex-shrink: 0;
    width: 2rem;
    height: 2rem;
    border-radius: var(--pf-radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
  }

  .pf-toast--success .pf-toast__icon {
    background: oklch(60% 0.18 145 / 0.2);
    color: var(--pf-success);
  }

  .pf-toast--error .pf-toast__icon {
    background: oklch(55% 0.22 25 / 0.2);
    color: var(--pf-error);
  }

  .pf-toast--info .pf-toast__icon {
    background: oklch(65% 0.15 230 / 0.2);
    color: var(--pf-info);
  }

  .pf-toast__content {
    flex: 1;
  }

  .pf-toast__title {
    font-size: var(--pf-font-size-sm);
    font-weight: var(--pf-font-weight-semibold);
    color: var(--pf-text-primary);
    line-height: 1.3;
  }

  .pf-toast__message {
    font-size: var(--pf-font-size-xs);
    color: var(--pf-text-muted);
  }

  .pf-toast__close {
    flex-shrink: 0;
    width: 1.5rem;
    height: 1.5rem;
    border-radius: var(--pf-radius-full);
    border: none;
    background: oklch(100% 0 0 / 0.05);
    color: var(--pf-text-muted);
    cursor: pointer;
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition:
      background var(--pf-duration-fast) var(--pf-ease-out),
      color var(--pf-duration-fast) var(--pf-ease-out);
  }

  .pf-toast__close:hover {
    background: oklch(100% 0 0 / 0.1);
    color: var(--pf-text-primary);
  }
}

/* ═══════════════════════════════════════════════════════════════════════════
   LAYER 17 · SKELETON LOADING
   ═══════════════════════════════════════════════════════════════════════════ */
@layer pf-components {
  .pf-skeleton {
    background: linear-gradient(
      90deg,
      oklch(25% 0.02 var(--pf-hue-primary)),
      oklch(30% 0.03 var(--pf-hue-primary)),
      oklch(25% 0.02 var(--pf-hue-primary))
    );
    background-size: 200% 100%;
    animation: pf-skeleton-shimmer 1.8s var(--pf-ease-in-out) infinite;
    border-radius: var(--pf-radius-md);
    contain: layout style paint;
  }

  .pf-skeleton--text {
    height: 0.875rem;
    border-radius: var(--pf-radius-sm);
  }

  .pf-skeleton--title {
    height: 1.2rem;
    width: 60%;
    margin-bottom: var(--pf-space-2);
  }

  .pf-skeleton--avatar {
    width: 3rem;
    height: 3rem;
    border-radius: 50%;
  }

  .pf-skeleton--media {
    aspect-ratio: 16 / 9;
    border-radius: var(--pf-radius-md);
  }

  .pf-skeleton--btn {
    height: 2.5rem;
    border-radius: var(--pf-radius-xl);
  }

  /* ── Skeleton card layout ── */
  .pf-skeleton-card {
    display: flex;
    flex-direction: column;
    gap: var(--pf-space-3);
    padding: var(--pf-space-4);
    background: var(--pf-bg-surface);
    border-radius: var(--pf-radius-lg);
    border: 1px solid var(--pf-border-subtle);
  }

  .pf-skeleton-card .pf-skeleton--media { width: 100%; }
  .pf-skeleton-card .pf-skeleton--title { width: 70%; }
  .pf-skeleton-card .pf-skeleton--text { width: 90%; }
  .pf-skeleton-card .pf-skeleton--text:last-child { width: 40%; }
}

/* ═══════════════════════════════════════════════════════════════════════════
   LAYER 18 · THEME TOGGLE
   ═══════════════════════════════════════════════════════════════════════════ */
@layer pf-components {
  .pf-theme-toggle {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: var(--pf-radius-full);
    border: 1px solid var(--pf-border-glass);
    background: var(--pf-bg-glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    color: var(--pf-text-secondary);
    transition:
      color var(--pf-duration-fast) var(--pf-ease-out),
      border-color var(--pf-duration-fast) var(--pf-ease-out),
      box-shadow var(--pf-duration-fast) var(--pf-ease-out),
      transform var(--pf-duration-fast) var(--pf-ease-out);
  }

  .pf-theme-toggle:hover {
    color: var(--pf-accent);
    border-color: var(--pf-border-accent);
    box-shadow: var(--pf-shadow-glow-accent);
  }

  .pf-theme-toggle:active {
    transform: scale(0.92);
  }
}

/* ═══════════════════════════════════════════════════════════════════════════
   LAYER 19 · VIEW TRANSITIONS
   ═══════════════════════════════════════════════════════════════════════════ */
@layer pf-base {
  @media (prefers-reduced-motion: no-preference) {
    ::view-transition-old(root) {
      animation: pf-fade-out 0.3s var(--pf-ease-out) both;
    }

    ::view-transition-new(root) {
      animation: pf-fade-in 0.3s var(--pf-ease-out) 0.1s both;
    }
  }
}

/* ═══════════════════════════════════════════════════════════════════════════
   LAYER 20 · UTILITY CLASSES
   ═══════════════════════════════════════════════════════════════════════════ */
@layer pf-utils {
  /* ── Display ── */
  .pf-hidden { display: none !important; }
  .pf-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;
  }

  /* ── Flex helpers ── */
  .pf-flex { display: flex; }
  .pf-flex-col { flex-direction: column; }
  .pf-items-center { align-items: center; }
  .pf-justify-center { justify-content: center; }
  .pf-justify-between { justify-content: space-between; }
  .pf-gap-1 { gap: var(--pf-space-1); }
  .pf-gap-2 { gap: var(--pf-space-2); }
  .pf-gap-3 { gap: var(--pf-space-3); }
  .pf-gap-4 { gap: var(--pf-space-4); }

  /* ── Text ── */
  .pf-text-center { text-align: center; }
  .pf-text-muted { color: var(--pf-text-muted); }
  .pf-text-secondary { color: var(--pf-text-secondary); }
  .pf-text-primary { color: var(--pf-primary-bright); }
  .pf-text-accent { color: var(--pf-accent); }
  .pf-text-xs { font-size: var(--pf-font-size-xs); }
  .pf-text-sm { font-size: var(--pf-font-size-sm); }
  .pf-font-mono { font-family: var(--pf-font-mono); }
  .pf-font-bold { font-weight: var(--pf-font-weight-bold); }
  .pf-font-semibold { font-weight: var(--pf-font-weight-semibold); }

  /* ── Spacing ── */
  .pf-mt-2 { margin-top: var(--pf-space-2); }
  .pf-mt-4 { margin-top: var(--pf-space-4); }
  .pf-mb-4 { margin-bottom: var(--pf-space-4); }
  .pf-p-2 { padding: var(--pf-space-2); }
  .pf-p-4 { padding: var(--pf-space-4); }
  .pf-px-4 { padding-left: var(--pf-space-4); padding-right: var(--pf-space-4); }
  .pf-py-4 { padding-top: var(--pf-space-4); padding-bottom: var(--pf-space-4); }

  /* ── Rounded ── */
  .pf-rounded-full { border-radius: var(--pf-radius-full); }
  .pf-rounded-lg { border-radius: var(--pf-radius-lg); }

  /* ── Shadows ── */
  .pf-shadow-glow { box-shadow: var(--pf-shadow-glow-primary); }

  /* ── Overflow ── */
  .pf-truncate {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  /* ── Width ── */
  .pf-w-full { width: 100%; }

  /* ── Content visibility for performance ── */
  .pf-cv-auto { content-visibility: auto; }
  .pf-contain-strict { contain: strict; }
  .pf-contain-layout { contain: layout style; }
}

/* ═══════════════════════════════════════════════════════════════════════════
   LAYER 21 · ANIMATIONS / KEYFRAMES
   ═══════════════════════════════════════════════════════════════════════════ */
@layer pf-animations {
  /* ── Ambient drift ── */
  @keyframes pf-ambient-drift {
    0%   { transform: translate(0, 0) rotate(0deg); }
    33%  { transform: translate(2%, 1%) rotate(1deg); }
    66%  { transform: translate(-1%, -1.5%) rotate(-0.5deg); }
    100% { transform: translate(1.5%, 0.5%) rotate(0.8deg); }
  }

  /* ── Particles float ── */
  @keyframes pf-particles-float {
    0%   { opacity: 0.5; transform: translateY(0); }
    50%  { opacity: 0.8; }
    100% { opacity: 0.4; transform: translateY(-6px); }
  }

  /* ── Orb pulse ── */
  @keyframes pf-orb-pulse {
    0%, 100% { transform: scale(1); }
    50%      { transform: scale(1.04); }
  }

  @keyframes pf-orb-ring {
    0%, 100% { transform: scale(1); opacity: 0.6; }
    50%      { transform: scale(1.06); opacity: 0.2; }
  }

  /* ── Recorder pulse ── */
  @keyframes pf-rec-pulse {
    0%, 100% { box-shadow: 0 0 32px oklch(55% 0.22 25 / 0.5), inset 0 2px 4px oklch(70% 0.2 25 / 0.4); }
    50%      { box-shadow: 0 0 56px oklch(55% 0.22 25 / 0.7), inset 0 2px 4px oklch(70% 0.2 25 / 0.5); }
  }

  @keyframes pf-rec-ring {
    0%   { transform: scale(1); opacity: 0.8; }
    100% { transform: scale(1.5); opacity: 0; }
  }

  /* ── Text blink ── */
  @keyframes pf-text-blink {
    0%, 100% { opacity: 1; }
    50%      { opacity: 0.5; }
  }

  /* ── Ripple ── */
  @keyframes pf-ripple-effect {
    to { transform: scale(4); opacity: 0; }
  }

  /* ── Skeleton shimmer ── */
  @keyframes pf-skeleton-shimmer {
    0%   { background-position: -200% 0; }
    100% { background-position: 200% 0; }
  }

  /* ── Toast in ── */
  @keyframes pf-toast-in {
    from { opacity: 0; transform: translateY(20px) scale(0.92); }
    to   { opacity: 1; transform: translateY(0) scale(1); }
  }

  /* ── Fade for view transitions ── */
  @keyframes pf-fade-out {
    to { opacity: 0; transform: translateY(-4px); }
  }

  @keyframes pf-fade-in {
    from { opacity: 0; transform: translateY(4px); }
    to   { opacity: 1; transform: translateY(0); }
  }

  /* ── Spin ── */
  .pf-animate-spin {
    animation: pf-spin 1s linear infinite;
  }

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

  /* ── Ping ── */
  .pf-animate-ping {
    animation: pf-ping 1.5s var(--pf-ease-out) infinite;
    will-change: transform;
  }

  @keyframes pf-ping {
    75%, 100% { transform: scale(1.5); opacity: 0; }
  }

  /* ── Pulse utility class ── */
  .pf-animate-pulse {
    animation: pf-pulse-util 2s var(--pf-ease-in-out) infinite;
  }

  @keyframes pf-pulse-util {
    0%, 100% { opacity: 1; }
    50%      { opacity: 0.55; }
  }

  /* ── Bounce ── */
  .pf-animate-bounce {
    animation: pf-bounce 0.6s var(--pf-ease-spring);
  }

  @keyframes pf-bounce {
    0%   { transform: scale(0.3); opacity: 0; }
    50%  { transform: scale(1.08); }
    70%  { transform: scale(0.95); }
    100% { transform: scale(1); opacity: 1; }
  }
}

/* ═══════════════════════════════════════════════════════════════════════════
   RESPONSIVE BREAKPOINTS
   ═══════════════════════════════════════════════════════════════════════════ */

/* ── 375px (base mobile) — already handled by mobile-first ── */

/* ── 768px Tablet ── */
@media (min-width: 768px) {
  :root {
    --pf-grid-gap: var(--pf-space-5);
    --pf-section-gap: var(--pf-space-10);
  }

  .pf-header {
    padding: 0 var(--pf-space-6);
  }

  .pf-main {
    padding: var(--pf-space-6);
    padding-bottom: calc(var(--pf-dock-height) + var(--pf-space-10));
  }

  .pf-card-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ── 1024px Desktop ── */
@media (min-width: 1024px) {
  :root {
    --pf-header-height: 4rem;
    --pf-dock-height: 4.5rem;
    --pf-content-max: 64rem;
    --pf-grid-gap: var(--pf-space-6);
    --pf-section-gap: var(--pf-space-12);
  }

  .pf-header {
    padding: 0 var(--pf-space-8);
  }

  .pf-main {
    padding: var(--pf-space-8);
    padding-bottom: calc(var(--pf-dock-height) + var(--pf-space-12));
  }

  .pf-card-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .pf-sound-grid {
    grid-template-columns: repeat(8, 1fr);
  }
}

/* ── 1440px Wide Desktop ── */
@media (min-width: 1440px) {
  :root {
    --pf-content-max: 72rem;
    --pf-grid-gap: var(--pf-space-8);
    --pf-section-gap: var(--pf-space-16);
  }

  .pf-main {
    padding: var(--pf-space-10);
    padding-bottom: calc(var(--pf-dock-height) + var(--pf-space-16));
  }

  .pf-card-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ═══════════════════════════════════════════════════════════════════════════
   CONTAINER QUERIES
   ═══════════════════════════════════════════════════════════════════════════ */
.pf-container {
  container-type: inline-size;
  container-name: pf-container;
}

@container pf-container (min-width: 420px) {
  .pf-card-grid { grid-template-columns: repeat(2, 1fr); }
}

@container pf-container (min-width: 720px) {
  .pf-card-grid { grid-template-columns: repeat(3, 1fr); }
}

@container pf-container (min-width: 960px) {
  .pf-card-grid { grid-template-columns: repeat(4, 1fr); }
}

/* ═══════════════════════════════════════════════════════════════════════════
   PRINT STYLES
   ═══════════════════════════════════════════════════════════════════════════ */
@media print {
  .pf-header,
  .pf-dock,
  .pf-toast-container,
  .pf-ambient,
  .pf-noise-overlay {
    display: none !important;
  }

  .pf-main {
    padding: 1rem;
    max-width: 100%;
  }

  body {
    background: white;
    color: black;
    font-size: 12pt;
  }
}

/* ═══════════════════════════════════════════════════════════════════════════
   END OF PIXELFORGE V4 · 2980 lines · Production-ready
   ═══════════════════════════════════════════════════════════════════════════ */