:root {
  --font-sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --background: 260 45% 98%;
  --foreground: 263 40% 14%;
  --card: 0 0% 100%;
  --card-foreground: 263 40% 14%;
  --popover: 0 0% 100%;
  --popover-foreground: 263 40% 14%;
  --primary: 266 84% 58%;
  --primary-foreground: 0 0% 100%;
  --secondary: 260 38% 92%;
  --secondary-foreground: 263 40% 18%;
  --muted: 260 32% 94%;
  --muted-foreground: 263 18% 42%;
  --accent: 287 75% 62%;
  --accent-foreground: 0 0% 100%;
  --destructive: 0 72% 48%;
  --destructive-foreground: 0 0% 100%;
  --success: 145 63% 36%;
  --success-foreground: 0 0% 100%;
  --warning: 38 92% 48%;
  --warning-foreground: 263 40% 14%;
  --info: 220 83% 53%;
  --info-foreground: 0 0% 100%;
  --border: 260 28% 86%;
  --input: 260 28% 86%;
  --ring: 266 84% 58%;
  --radius: 0.625rem;
  --shadow-sm: 0 1px 2px hsl(var(--foreground) / 0.05);
  --shadow-md: 0 4px 12px hsl(var(--foreground) / 0.08);
  --shadow-lg: 0 12px 32px hsl(var(--foreground) / 0.12);
  --shadow-elegant: 0 18px 52px hsl(var(--primary) / 0.24);
  --transition-fast: 150ms cubic-bezier(0.4,0,0.2,1);
  --transition: 200ms cubic-bezier(0.4,0,0.2,1);
  --transition-smooth: 300ms cubic-bezier(0.4,0,0.2,1);
}
.dark {
  --background: 263 40% 9%;
  --foreground: 260 30% 96%;
  --card: 263 34% 13%;
  --card-foreground: 260 30% 96%;
  --popover: 263 34% 13%;
  --popover-foreground: 260 30% 96%;
  --primary: 266 88% 68%;
  --primary-foreground: 263 40% 10%;
  --secondary: 263 25% 20%;
  --secondary-foreground: 260 30% 96%;
  --muted: 263 25% 18%;
  --muted-foreground: 260 18% 74%;
  --accent: 287 80% 70%;
  --accent-foreground: 263 40% 10%;
  --destructive: 0 70% 55%;
  --destructive-foreground: 0 0% 100%;
  --success: 145 58% 44%;
  --success-foreground: 0 0% 100%;
  --warning: 38 92% 56%;
  --warning-foreground: 263 40% 10%;
  --info: 220 88% 66%;
  --info-foreground: 263 40% 10%;
  --border: 263 22% 24%;
  --input: 263 22% 24%;
  --ring: 266 88% 68%;
}
* { box-sizing: border-box; }
html { font-family: var(--font-sans); background: hsl(var(--background)); color: hsl(var(--foreground)); }
body { margin: 0; min-height: 100vh; background: radial-gradient(circle at top left, hsl(var(--primary) / 0.16), transparent 28rem), hsl(var(--background)); }
a { color: inherit; text-decoration: none; }
button, input, textarea, select { font: inherit; }
button { min-height: 44px; cursor: pointer; }
button:disabled { cursor: not-allowed; opacity: 0.55; }
.field { width: 100%; min-height: 44px; border: 1px solid hsl(var(--input)); border-radius: calc(var(--radius) - 2px); background: hsl(var(--background)); color: hsl(var(--foreground)); padding: 0.75rem 1rem; font-size: max(16px, 1rem); outline: none; }
.field:focus { box-shadow: 0 0 0 2px hsl(var(--ring)); }
.app-shell { display: grid; grid-template-columns: 17rem 1fr; min-height: 100vh; }
.sidebar { position: sticky; top: 0; height: 100vh; padding: 1.5rem; border-right: 1px solid hsl(var(--border)); background: hsl(var(--card) / 0.86); backdrop-filter: blur(16px); }
.brand { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 2rem; font-size: 1.25rem; font-weight: 700; }
.brand span { display: grid; place-items: center; width: 2.75rem; height: 2.75rem; border-radius: 999px; background: hsl(var(--primary)); color: hsl(var(--primary-foreground)); box-shadow: var(--shadow-elegant); }
.side-nav { display: grid; gap: 0.5rem; }
.side-nav a { min-height: 44px; display: flex; align-items: center; padding: 0.75rem 1rem; border-radius: calc(var(--radius) - 2px); color: hsl(var(--muted-foreground)); font-weight: 500; transition: var(--transition); }
.side-nav a:hover, .side-nav a.active { background: hsl(var(--primary) / 0.12); color: hsl(var(--primary)); transform: translateY(-1px); }
.content-shell { min-width: 0; padding-bottom: 6rem; }
.topbar { position: sticky; top: 0; z-index: 5; display: flex; justify-content: space-between; align-items: center; gap: 1rem; padding: 1rem 2rem; border-bottom: 1px solid hsl(var(--border)); background: hsl(var(--background) / 0.88); backdrop-filter: blur(16px); }
.topbar-actions { display: flex; align-items: center; gap: 0.5rem; }
.main-content { max-width: 80rem; margin: 0 auto; padding: 2rem; }
.page-section { margin-bottom: 2rem; }
.hero-card, .form-card, .post-card, .side-panel, .capsule-card, .voice-card, .room-card, .dna-card, .empty-card, .upload-card, .profile-card { background: hsl(var(--card)); color: hsl(var(--card-foreground)); border: 1px solid hsl(var(--border)); border-radius: var(--radius); box-shadow: var(--shadow-sm); }
.hero-card { padding: 2rem; display: grid; gap: 1.5rem; }
.section-heading { max-width: 48rem; }
.eyebrow { margin: 0 0 0.5rem; font-size: 0.875rem; line-height: 1.25rem; font-weight: 500; color: hsl(var(--muted-foreground)); }
h1, h2, h3 { margin: 0; letter-spacing: -0.025em; font-weight: 600; }
h1 { font-size: clamp(2rem, 4vw, 3rem); line-height: 1.08; }
h2 { font-size: 1.5rem; line-height: 2rem; }
h3 { font-size: 1.125rem; line-height: 1.75rem; }
.section-copy, .post-card p, .capsule-card p, .room-card p, .muted-text { color: hsl(var(--muted-foreground)); line-height: 1.5; }
.quick-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; }
.metric-card { padding: 1rem; border-radius: var(--radius); background: hsl(var(--primary) / 0.1); border: 1px solid hsl(var(--primary) / 0.18); }
.metric-card span { display: block; color: hsl(var(--primary)); font-size: 1.875rem; line-height: 2.25rem; font-weight: 700; }
.metric-card small { color: hsl(var(--muted-foreground)); font-weight: 500; }
.two-column { display: grid; grid-template-columns: minmax(0, 1fr) 20rem; gap: 1.5rem; }
.feed-stack, .voice-list { display: grid; gap: 1rem; }
.post-card, .side-panel, .capsule-card, .voice-card, .room-card, .dna-card, .empty-card, .upload-card, .profile-card { padding: 1.5rem; }
.post-topline { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 1rem; }
.post-topline span { display: block; color: hsl(var(--muted-foreground)); font-size: 0.875rem; }
.post-topline em { margin-left: auto; font-style: normal; font-size: 0.75rem; color: hsl(var(--primary)); background: hsl(var(--primary) / 0.12); border-radius: 999px; padding: 0.25rem 0.5rem; }
.avatar { width: 2.5rem; height: 2.5rem; border-radius: 999px; display: grid; place-items: center; background: hsl(var(--secondary)); color: hsl(var(--secondary-foreground)); font-weight: 700; }
.avatar.large { width: 4rem; height: 4rem; font-size: 1.5rem; }
.mini-list { display: grid; gap: 0.75rem; margin: 1rem 0; }
.mini-row { display: flex; justify-content: space-between; min-height: 44px; align-items: center; border-bottom: 1px solid hsl(var(--border)); }
.voice-preview { padding: 1rem; border-radius: var(--radius); background: hsl(var(--muted)); }
.form-card { display: grid; gap: 1rem; padding: 1.5rem; max-width: 42rem; }
.form-card label, .auth-form label { display: grid; gap: 0.5rem; font-weight: 500; }
.form-actions, .card-actions, .voice-controls { display: flex; flex-wrap: wrap; gap: 0.75rem; align-items: center; }
.primary-button, .secondary-button, .danger-button, .icon-button, .secondary-link { border: 1px solid transparent; border-radius: calc(var(--radius) - 2px); padding: 0.75rem 1rem; font-weight: 500; transition: var(--transition-fast); display: inline-flex; align-items: center; justify-content: center; min-height: 44px; }
.primary-button { background: hsl(var(--primary)); color: hsl(var(--primary-foreground)); box-shadow: var(--shadow-sm); }
.primary-button:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.secondary-button, .icon-button, .secondary-link { background: hsl(var(--secondary)); color: hsl(var(--secondary-foreground)); border-color: hsl(var(--border)); }
.danger-button { background: hsl(var(--destructive)); color: hsl(var(--destructive-foreground)); }
.full { width: 100%; }
.capsule-grid, .room-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.card-status { display: inline-flex; width: fit-content; margin-bottom: 1rem; border-radius: 999px; padding: 0.25rem 0.75rem; font-size: 0.875rem; font-weight: 500; }
.status-open { background: hsl(var(--success) / 0.12); color: hsl(var(--success)); }
.status-sealed { background: hsl(var(--warning) / 0.14); color: hsl(var(--warning)); }
blockquote { margin: 1rem 0; padding-left: 1rem; border-left: 3px solid hsl(var(--primary)); color: hsl(var(--foreground)); }
.upload-card { margin-top: 1rem; display: grid; gap: 1rem; }
.voice-card audio { width: 100%; margin-top: 1rem; }
.waveform { height: 5rem; display: flex; align-items: center; gap: 0.375rem; margin: 1rem 0; padding: 0.75rem; border-radius: var(--radius); background: hsl(var(--muted)); }
.waveform span { width: 0.5rem; border-radius: 999px; background: linear-gradient(180deg, hsl(var(--accent)), hsl(var(--primary))); }
.dna-layout { display: grid; grid-template-columns: minmax(0, 1fr) 24rem; gap: 1.5rem; align-items: center; }
.select-label { display: grid; gap: 0.5rem; margin-top: 1.5rem; max-width: 24rem; font-weight: 500; }
.dna-card { display: grid; place-items: center; text-align: center; gap: 1rem; }
.dna-ring { --score: 75; width: 14rem; height: 14rem; border-radius: 999px; display: grid; place-items: center; background: conic-gradient(hsl(var(--primary)) calc(var(--score) * 1%), hsl(var(--muted)) 0); position: relative; }
.dna-ring::after { content: ''; position: absolute; inset: 1rem; border-radius: 999px; background: hsl(var(--card)); }
.dna-ring span { position: relative; z-index: 1; font-size: 2.25rem; font-weight: 700; color: hsl(var(--primary)); }
.trait-row { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.5rem; }
.trait-row span { border-radius: 999px; background: hsl(var(--primary) / 0.12); color: hsl(var(--primary)); padding: 0.375rem 0.75rem; font-weight: 500; }
.profile-card { display: flex; align-items: center; gap: 1rem; }
.bottom-nav { display: none; }
.toast-region { position: fixed; right: 1rem; bottom: 1rem; z-index: 40; display: grid; gap: 0.5rem; }
.toast { padding: 1rem; border-radius: var(--radius); box-shadow: var(--shadow-md); background: hsl(var(--success)); color: hsl(var(--success-foreground)); max-width: 22rem; }
.toast.error { background: hsl(var(--destructive)); color: hsl(var(--destructive-foreground)); }
.modal-backdrop { position: fixed; inset: 0; z-index: 30; display: grid; place-items: center; padding: 1rem; background: hsl(var(--foreground) / 0.38); }
.auth-modal { width: min(100%, 34rem); max-height: 92vh; overflow: auto; border-radius: calc(var(--radius) + 4px); background: hsl(var(--popover)); color: hsl(var(--popover-foreground)); box-shadow: var(--shadow-lg); padding: 1.5rem; display: grid; gap: 1rem; }
.modal-head { display: flex; justify-content: space-between; gap: 1rem; }
.auth-form { display: grid; gap: 0.75rem; padding-top: 1rem; border-top: 1px solid hsl(var(--border)); }
@media (max-width: 900px) {
  .app-shell { display: block; }
  .sidebar { display: none; }
  .topbar { padding: 1rem; }
  .main-content { padding: 1rem 1rem 6rem; }
  .two-column, .dna-layout, .capsule-grid, .room-grid { grid-template-columns: 1fr; }
  .quick-grid { grid-template-columns: 1fr; }
  .bottom-nav { position: fixed; left: 0; right: 0; bottom: 0; z-index: 20; display: grid; grid-template-columns: repeat(5, 1fr); gap: 0.25rem; padding: 0.5rem 0.5rem calc(0.5rem + env(safe-area-inset-bottom)); border-top: 1px solid hsl(var(--border)); background: hsl(var(--card) / 0.94); backdrop-filter: blur(16px); }
  .bottom-nav a { min-height: 44px; display: grid; place-items: center; border-radius: calc(var(--radius) - 2px); font-size: 0.875rem; font-weight: 500; color: hsl(var(--muted-foreground)); }
  .bottom-nav a.active { background: hsl(var(--primary) / 0.12); color: hsl(var(--primary)); }
  .topbar-actions { flex-wrap: wrap; justify-content: flex-end; }
}
@media (max-width: 520px) {
  .hero-card, .post-card, .side-panel, .capsule-card, .voice-card, .room-card, .dna-card, .empty-card, .upload-card, .profile-card, .form-card { padding: 1rem; }
  .form-actions, .card-actions, .voice-controls { flex-direction: column; align-items: stretch; }
  .primary-button, .secondary-button, .danger-button, .icon-button, .secondary-link { width: 100%; }
}