/* ==========================================================================
   Ya Sai Reads · "Night Library" design system · v1.0 (LOCKED)
   The one stylesheet. Every color, font, space, radius, shadow and motion value
   in the product comes from the tokens below. Never hard-code what a token carries.
   ========================================================================== */

:root {
  color-scheme: dark;

  /* ---- Color roles ------------------------------------------------------ */
  --color-bg:        #0F1020;   /* ink: the page */
  --color-surface:   #181B30;   /* cards */
  --color-surface-2: #212546;   /* raised: inputs, tracks, hover */
  --color-text:      #F4F1EA;   /* paper */
  --color-text-2:    #AEB1C9;   /* secondary copy */
  --color-text-3:    #737799;   /* muted labels */
  --color-divider:   color-mix(in srgb, #F4F1EA 10%, transparent);

  --color-accent:    #F5B942;   /* lamp: primary action, XP, progress */
  --color-accent-2:  #FF6B6B;   /* ember: streaks, celebration */
  --color-leaf:      #5EDAA8;   /* success, finished */
  --color-sky:       #7C8CFF;   /* info, links */
  --color-grape:     #B57BFF;   /* level, rank */
  --color-on-accent: #1A1304;   /* text on lamp fills */

  /* ---- Tonal ramps (100 light to 900 dark) ----------------------------- */
  --color-neutral-100: #F4F1EA; --color-neutral-200: #D9D8E3; --color-neutral-300: #AEB1C9;
  --color-neutral-400: #8B8FAD; --color-neutral-500: #737799; --color-neutral-600: #51557A;
  --color-neutral-700: #353A5E; --color-neutral-800: #212546; --color-neutral-900: #181B30;
  --color-neutral-950: #0F1020;

  --color-accent-100: #FFF6E0; --color-accent-200: #FFEAB8; --color-accent-300: #FFD98A;
  --color-accent-400: #FBC95F; --color-accent-500: #F5B942; --color-accent-600: #D99A22;
  --color-accent-700: #B07A14; --color-accent-800: #7E560C; --color-accent-900: #4E3407;

  --color-accent-2-100: #FFECEC; --color-accent-2-200: #FFD1D1; --color-accent-2-300: #FFADAD;
  --color-accent-2-400: #FF8A8A; --color-accent-2-500: #FF6B6B; --color-accent-2-600: #E04E4E;
  --color-accent-2-700: #B53838; --color-accent-2-800: #822626; --color-accent-2-900: #4F1616;

  --color-leaf-200:  #CFF5E6; --color-leaf-700:  #237A58;
  --color-sky-200:   #DCE0FF; --color-sky-700:   #3A48B8;
  --color-grape-200: #ECDDFF; --color-grape-700: #6E3BB5;

  /* Badge tiers */
  --color-bronze: #CD8B5A; --color-silver: #BFC7D9; --color-gold: #F5B942;

  /* Gradients: the only place two colors meet */
  --grad-sunset: linear-gradient(135deg, #F5B942 0%, #FF6B6B 100%);
  --grad-dusk:   linear-gradient(135deg, #7C8CFF 0%, #B57BFF 100%);
  --grad-leaf:   linear-gradient(135deg, #5EDAA8 0%, #7C8CFF 100%);
  --grad-ink:    radial-gradient(120% 80% at 50% 0%, #212546 0%, #0F1020 70%);

  /* ---- Type ------------------------------------------------------------- */
  --font-display: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Palatino, Charter, Georgia, serif;
  --font-body: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, "Helvetica Neue", Arial, system-ui, sans-serif;
  --font-mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --font-display-weight: 700;

  --text-display-xl: 44px; --lh-display-xl: 1.05;
  --text-display-lg: 34px; --lh-display-lg: 1.1;
  --text-h1: 28px; --lh-h1: 1.15;
  --text-h2: 22px; --lh-h2: 1.2;
  --text-h3: 18px; --lh-h3: 1.3;
  --text-body-lg: 17px;
  --text-body: 16px; --lh-body: 1.5;
  --text-small: 14px; --lh-small: 1.45;
  --text-caption: 12px; --lh-caption: 1.3; --track-caption: 0.08em;

  /* ---- Space, radius, elevation, motion -------------------------------- */
  --space-1: 4px; --space-2: 8px; --space-3: 12px; --space-4: 16px; --space-5: 20px;
  --space-6: 24px; --space-8: 32px; --space-10: 40px; --space-12: 48px;

  --radius-sm: 10px; --radius-md: 16px; --radius-lg: 24px; --radius-pill: 999px;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 6px 18px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 18px 48px rgba(0, 0, 0, 0.55);
  --glow-accent: 0 8px 28px color-mix(in srgb, #F5B942 35%, transparent);
  --glow-ember:  0 8px 28px color-mix(in srgb, #FF6B6B 35%, transparent);

  --ease-out: cubic-bezier(0.2, 0.8, 0.2, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --dur-fast: 160ms; --dur: 240ms; --dur-slow: 480ms;

  --touch: 44px;         /* minimum tap target */
  --control: 48px;       /* inputs and default buttons */
  --tabbar-h: 64px;
  --content-max: 1080px;
  --col-max: 560px;      /* reading-width column on desktop */
}

/* ==========================================================================
   Base
   ========================================================================== */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; min-height: 100dvh;
  background: var(--color-bg); background-image: var(--grad-ink); background-attachment: fixed;
  color: var(--color-text);
  font-family: var(--font-body); font-size: var(--text-body); line-height: var(--lh-body);
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, .display { font-family: var(--font-display); font-weight: var(--font-display-weight); margin: 0; letter-spacing: -0.01em; color: var(--color-text); }
h1 { font-size: var(--text-h1); line-height: var(--lh-h1); }
h2 { font-size: var(--text-h2); line-height: var(--lh-h2); }
h3 { font-size: var(--text-h3); line-height: var(--lh-h3); }
.display-xl { font-size: var(--text-display-xl); line-height: var(--lh-display-xl); letter-spacing: -0.02em; }
.display-lg { font-size: var(--text-display-lg); line-height: var(--lh-display-lg); letter-spacing: -0.02em; }
p { margin: 0; }
a { color: var(--color-sky); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
img, svg { display: block; max-width: 100%; }
.num { font-variant-numeric: tabular-nums lining-nums; }
.small { font-size: var(--text-small); line-height: var(--lh-small); }
.caption { font-size: var(--text-caption); line-height: var(--lh-caption); letter-spacing: var(--track-caption); text-transform: uppercase; font-weight: 600; color: var(--color-text-3); }
.muted { color: var(--color-text-2); }
.faint { color: var(--color-text-3); }
.accent { color: var(--color-accent); }
.ember { color: var(--color-accent-2); }
.leaf { color: var(--color-leaf); }
.grape { color: var(--color-grape); }
::selection { background: color-mix(in srgb, var(--color-accent) 35%, transparent); }
:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; border-radius: var(--radius-sm); }
.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; }

/* ==========================================================================
   Layout: app shell, top bar (desktop), tab bar (mobile)
   ========================================================================== */
.app { min-height: 100dvh; display: flex; flex-direction: column; }
.page { flex: 1; width: 100%; max-width: var(--content-max); margin: 0 auto;
  padding: var(--space-4) var(--space-4) calc(var(--tabbar-h) + env(safe-area-inset-bottom) + var(--space-6)); }
.page-narrow { max-width: var(--col-max); }
.page-head { display: flex; align-items: flex-end; justify-content: space-between; gap: var(--space-3); margin-bottom: var(--space-4); }
.page-head .caption { margin-bottom: var(--space-1); }

.topbar { position: sticky; top: 0; z-index: 30; display: none;
  background: color-mix(in srgb, var(--color-bg) 82%, transparent); backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-divider); padding-top: env(safe-area-inset-top); }
.topbar-inner { max-width: var(--content-max); margin: 0 auto; padding: 0 var(--space-4); height: 64px; display: flex; align-items: center; gap: var(--space-6); }
.brand { display: inline-flex; align-items: center; gap: var(--space-2); color: var(--color-text); font-family: var(--font-display); font-weight: var(--font-display-weight); font-size: 20px; letter-spacing: -0.01em; }
.brand:hover { text-decoration: none; }
.brand-mark { width: 30px; height: 30px; border-radius: 9px; background: var(--grad-sunset); display: grid; place-items: center; color: var(--color-on-accent); box-shadow: var(--glow-accent); }
.brand-mark svg { width: 18px; height: 18px; }
.topnav { display: flex; gap: var(--space-1); margin-left: auto; }
.topnav a { display: inline-flex; align-items: center; gap: var(--space-2); min-height: var(--touch); padding: 0 var(--space-3);
  border-radius: var(--radius-pill); color: var(--color-text-2); font-weight: 600; font-size: 15px; transition: background var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out); }
.topnav a svg { width: 20px; height: 20px; }
.topnav a:hover { background: var(--color-surface-2); color: var(--color-text); text-decoration: none; }
.topnav a.is-active { background: color-mix(in srgb, var(--color-accent) 16%, transparent); color: var(--color-accent); }

.mobile-head { display: flex; align-items: center; justify-content: space-between; gap: var(--space-3);
  padding: calc(env(safe-area-inset-top) + var(--space-2)) var(--space-4) var(--space-2); }

.tabbar { position: fixed; left: 0; right: 0; bottom: 0; z-index: 30;
  display: grid; grid-template-columns: repeat(5, 1fr);
  height: calc(var(--tabbar-h) + env(safe-area-inset-bottom)); padding-bottom: env(safe-area-inset-bottom);
  background: color-mix(in srgb, var(--color-surface) 88%, transparent); backdrop-filter: blur(16px);
  border-top: 1px solid var(--color-divider); }
.tab { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 3px;
  color: var(--color-text-3); font-size: 11px; font-weight: 600; letter-spacing: 0.02em; min-height: var(--touch);
  transition: color var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-spring); }
.tab svg { width: 24px; height: 24px; }
.tab:hover { text-decoration: none; color: var(--color-text-2); }
.tab.is-active { color: var(--color-accent); }
.tab.is-active svg { fill: color-mix(in srgb, var(--color-accent) 22%, transparent); }
.tab:active { transform: scale(0.94); }

@media (min-width: 840px) {
  .topbar { display: block; }
  .tabbar, .mobile-head { display: none; }
  .page { padding: var(--space-8) var(--space-6) var(--space-12); }
  .page-narrow { margin: 0 auto; }
}

/* ==========================================================================
   Buttons, chips, tags
   ========================================================================== */
.btn { appearance: none; border: 0; cursor: pointer; display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2);
  min-height: var(--control); padding: 0 var(--space-5); border-radius: var(--radius-pill);
  font: inherit; font-weight: 700; font-size: var(--text-body); letter-spacing: 0.005em; text-decoration: none; white-space: nowrap;
  transition: transform var(--dur-fast) var(--ease-spring), background var(--dur-fast) var(--ease-out), box-shadow var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out); }
.btn svg { width: 20px; height: 20px; flex: none; }
.btn:hover { text-decoration: none; }
.btn:active { transform: scale(0.97); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; transform: none; }
.btn-primary { background: var(--color-accent); color: var(--color-on-accent); box-shadow: var(--glow-accent); }
.btn-primary:hover { background: var(--color-accent-400); }
.btn-primary:active { background: var(--color-accent-600); }
.btn-secondary { background: var(--color-surface-2); color: var(--color-text); border: 1px solid var(--color-divider); }
.btn-secondary:hover { background: var(--color-neutral-700); }
.btn-ghost { background: transparent; color: var(--color-text-2); }
.btn-ghost:hover { background: var(--color-surface-2); color: var(--color-text); }
.btn-ember { background: var(--color-accent-2); color: #FFFFFF; box-shadow: var(--glow-ember); }
.btn-ember:hover { background: var(--color-accent-2-400); }
.btn-danger { background: transparent; color: var(--color-accent-2); border: 1px solid color-mix(in srgb, var(--color-accent-2) 40%, transparent); }
.btn-danger:hover { background: color-mix(in srgb, var(--color-accent-2) 14%, transparent); }
.btn-lg { min-height: 56px; padding: 0 var(--space-6); font-size: var(--text-body-lg); }
.btn-sm { min-height: 36px; padding: 0 var(--space-3); font-size: var(--text-small); }
.btn-sm svg { width: 16px; height: 16px; }
.btn-block { width: 100%; }
.btn-icon { width: var(--control); padding: 0; }
.btn-icon.btn-sm { width: 36px; }
.fab { position: fixed; right: var(--space-4); bottom: calc(var(--tabbar-h) + env(safe-area-inset-bottom) + var(--space-4)); z-index: 25;
  width: 56px; height: 56px; border-radius: var(--radius-pill); box-shadow: var(--glow-accent), var(--shadow-md); }
@media (min-width: 840px) { .fab { display: none; } }

.chip { display: inline-flex; align-items: center; gap: 6px; min-height: 30px; padding: 0 var(--space-3); border-radius: var(--radius-pill);
  font-size: var(--text-small); font-weight: 700; background: var(--color-surface-2); color: var(--color-text-2); white-space: nowrap; }
.chip svg { width: 16px; height: 16px; }
.chip-xp { background: color-mix(in srgb, var(--color-accent) 18%, transparent); color: var(--color-accent); }
.chip-streak { background: color-mix(in srgb, var(--color-accent-2) 18%, transparent); color: var(--color-accent-2); }
.chip-streak.is-cold { background: var(--color-surface-2); color: var(--color-text-3); }
.chip-level { background: color-mix(in srgb, var(--color-grape) 20%, transparent); color: var(--color-grape); }
.chip-leaf { background: color-mix(in srgb, var(--color-leaf) 18%, transparent); color: var(--color-leaf); }
.chip-sky { background: color-mix(in srgb, var(--color-sky) 20%, transparent); color: var(--color-sky); }
.tag { display: inline-flex; align-items: center; gap: 4px; min-height: 22px; padding: 0 var(--space-2); border-radius: 6px;
  font-size: var(--text-caption); font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase; background: var(--color-surface-2); color: var(--color-text-2); }
.tag-genre { background: color-mix(in srgb, var(--color-sky) 18%, transparent); color: var(--color-sky); }

/* ==========================================================================
   Cards, lists, empty states
   ========================================================================== */
.card { background: var(--color-surface); border: 1px solid var(--color-divider); border-radius: var(--radius-lg); padding: var(--space-4); box-shadow: var(--shadow-sm); }
.card + .card { margin-top: var(--space-3); }
.card-glow { border-color: color-mix(in srgb, var(--color-accent) 45%, transparent); box-shadow: var(--glow-accent); }
.card-hero { background: var(--grad-dusk); border: 0; color: #FFFFFF; position: relative; overflow: hidden; }
.card-hero::after { content: ""; position: absolute; inset: auto -20% -60% auto; width: 70%; aspect-ratio: 1; border-radius: 50%; background: rgba(255,255,255,0.12); }
.card-kicker { font-size: var(--text-caption); letter-spacing: var(--track-caption); text-transform: uppercase; font-weight: 600; color: var(--color-text-3); margin-bottom: var(--space-1); }
.card-title { font-family: var(--font-display); font-weight: var(--font-display-weight); font-size: var(--text-h3); line-height: var(--lh-h3); }
.card-row { display: flex; align-items: center; gap: var(--space-3); }
.card-link { display: block; color: inherit; transition: transform var(--dur-fast) var(--ease-spring), border-color var(--dur-fast) var(--ease-out); }
.card-link:hover { text-decoration: none; border-color: color-mix(in srgb, var(--color-text) 20%, transparent); transform: translateY(-1px); }
.stack { display: grid; gap: var(--space-3); }
.stack-sm { gap: var(--space-2); }
.row { display: flex; align-items: center; gap: var(--space-2); flex-wrap: wrap; }
.between { display: flex; align-items: center; justify-content: space-between; gap: var(--space-3); }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-3); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-3); }
@media (min-width: 840px) { .grid-desk-2 { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); align-items: start; } .grid-desk-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-4); } }
.divider { height: 1px; background: var(--color-divider); margin: var(--space-4) 0; }

.empty { text-align: center; padding: var(--space-10) var(--space-4); }
.empty-art { width: 72px; height: 72px; margin: 0 auto var(--space-4); border-radius: 50%; display: grid; place-items: center;
  background: color-mix(in srgb, var(--color-accent) 14%, transparent); color: var(--color-accent); }
.empty-art svg { width: 32px; height: 32px; }
.empty h2 { margin-bottom: var(--space-2); }
.empty p { color: var(--color-text-2); max-width: 36ch; margin: 0 auto var(--space-5); }

/* ==========================================================================
   Stats, progress, ring
   ========================================================================== */
.stat { display: grid; gap: 2px; }
.stat-num { font-family: var(--font-display); font-weight: var(--font-display-weight); font-size: var(--text-display-lg); line-height: 1; letter-spacing: -0.02em; font-variant-numeric: tabular-nums lining-nums; }
.stat-num.sm { font-size: var(--text-h1); }
.stat-label { font-size: var(--text-small); color: var(--color-text-2); }

.progress { height: 10px; border-radius: var(--radius-pill); background: var(--color-surface-2); overflow: hidden; }
.progress-fill { height: 100%; width: 0; border-radius: inherit; background: var(--color-accent); transition: width var(--dur-slow) var(--ease-out); }
.progress-fill.is-done { background: var(--color-leaf); }
.progress-fill.is-club { background: var(--grad-leaf); }
.progress-thin { height: 6px; }
.progress-meta { display: flex; justify-content: space-between; margin-top: var(--space-2); font-size: var(--text-small); color: var(--color-text-2); }

.ring { position: relative; width: 112px; height: 112px; display: grid; place-items: center; }
.ring svg { position: absolute; inset: 0; width: 100%; height: 100%; transform: rotate(-90deg); }
.ring circle { fill: none; stroke-width: 9; stroke-linecap: round; }
.ring .ring-track { stroke: var(--color-surface-2); }
.ring .ring-fill { stroke: var(--color-accent); transition: stroke-dashoffset var(--dur-slow) var(--ease-out); }
.ring-center { text-align: center; position: relative; }
.ring-center .stat-num { font-size: 30px; }
.ring-center .caption { margin-top: 2px; }
.ring-lg { width: 148px; height: 148px; }
.ring-lg .ring-center .stat-num { font-size: 40px; }

/* ==========================================================================
   Book cover (generated), avatar
   ========================================================================== */
.cover { --hue: 220; position: relative; aspect-ratio: 2 / 3; width: 72px; border-radius: 8px; overflow: hidden; flex: none;
  background: linear-gradient(160deg, hsl(var(--hue) 55% 42%) 0%, hsl(var(--hue) 65% 22%) 100%);
  box-shadow: var(--shadow-md), inset 0 0 0 1px rgba(255,255,255,0.08); }
.cover::before { content: ""; position: absolute; left: 7px; top: 0; bottom: 0; width: 1px; background: rgba(255,255,255,0.25); }
.cover-title { position: absolute; inset: 10px 8px 8px 14px; display: flex; align-items: flex-end;
  font-family: var(--font-display); font-weight: var(--font-display-weight); color: rgba(255,255,255,0.95); font-size: 11px; line-height: 1.15;
  overflow: hidden; text-shadow: 0 1px 2px rgba(0,0,0,0.4); }
.cover img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.cover-sm { width: 48px; border-radius: 6px; } .cover-sm .cover-title { font-size: 8px; inset: 6px 5px 5px 10px; }
.cover-lg { width: 120px; border-radius: 12px; } .cover-lg .cover-title { font-size: 16px; inset: 14px 12px 12px 20px; }
.cover-xl { width: 160px; border-radius: 14px; } .cover-xl .cover-title { font-size: 20px; inset: 18px 14px 14px 24px; }
.cover.is-finished::after { content: ""; position: absolute; right: 6px; top: 6px; width: 18px; height: 18px; border-radius: 50%; background: var(--color-leaf);
  box-shadow: 0 0 0 2px rgba(0,0,0,0.35); }

.avatar { --avatar: var(--color-accent); width: 44px; height: 44px; border-radius: 50%; flex: none; display: grid; place-items: center;
  background: color-mix(in srgb, var(--avatar) 28%, var(--color-surface-2)); border: 2px solid var(--avatar); font-size: 22px; line-height: 1; }
.avatar-sm { width: 32px; height: 32px; font-size: 16px; border-width: 1.5px; }
.avatar-lg { width: 72px; height: 72px; font-size: 36px; border-width: 3px; }
.avatar-xl { width: 96px; height: 96px; font-size: 48px; border-width: 3px; }

/* ==========================================================================
   Badges
   ========================================================================== */
.badge-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-3); }
@media (min-width: 840px) { .badge-grid { grid-template-columns: repeat(5, 1fr); } }
.badge { --tier: var(--color-bronze); display: grid; justify-items: center; gap: var(--space-2); text-align: center; padding: var(--space-4) var(--space-2);
  background: var(--color-surface); border: 1px solid var(--color-divider); border-radius: var(--radius-md); }
.badge-icon { width: 56px; height: 56px; border-radius: 50%; display: grid; place-items: center; color: var(--tier);
  background: color-mix(in srgb, var(--tier) 18%, transparent); box-shadow: inset 0 0 0 2px color-mix(in srgb, var(--tier) 55%, transparent); }
.badge-icon svg { width: 26px; height: 26px; }
.badge-name { font-weight: 700; font-size: var(--text-small); line-height: 1.25; }
.badge-when { font-size: var(--text-caption); color: var(--color-text-3); }
.badge.tier-silver { --tier: var(--color-silver); }
.badge.tier-gold { --tier: var(--color-gold); }
.badge.is-locked { opacity: 0.55; }
.badge.is-locked .badge-icon { color: var(--color-text-3); background: var(--color-surface-2); box-shadow: none; filter: grayscale(1); }
.badge-row { display: flex; gap: var(--space-2); overflow-x: auto; padding-bottom: var(--space-1); scrollbar-width: none; }
.badge-row .badge { min-width: 112px; }

/* ==========================================================================
   Feed, leaderboard
   ========================================================================== */
.feed-item { display: grid; grid-template-columns: auto 1fr; gap: var(--space-3); }
.feed-body { display: grid; gap: var(--space-1); min-width: 0; }
.feed-text strong { color: var(--color-text); }
.feed-time { font-size: var(--text-caption); color: var(--color-text-3); }
.feed-quote { margin-top: var(--space-1); padding: var(--space-2) var(--space-3); border-left: 3px solid var(--color-accent); background: var(--color-surface-2); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; font-style: italic; color: var(--color-text-2); font-size: var(--text-small); }
.kudos { appearance: none; border: 1px solid var(--color-divider); background: var(--color-surface-2); color: var(--color-text-2); cursor: pointer; font: inherit; font-weight: 700; font-size: var(--text-small);
  display: inline-flex; align-items: center; gap: 6px; min-height: 36px; padding: 0 var(--space-3); border-radius: var(--radius-pill);
  transition: transform var(--dur-fast) var(--ease-spring), background var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out); }
.kudos svg { width: 16px; height: 16px; }
.kudos:active { transform: scale(0.92); }
.kudos.is-on { background: color-mix(in srgb, var(--color-accent-2) 20%, transparent); color: var(--color-accent-2); border-color: color-mix(in srgb, var(--color-accent-2) 40%, transparent); }

.seg { display: inline-grid; grid-auto-flow: column; grid-auto-columns: 1fr; width: 100%; padding: 4px; border-radius: var(--radius-pill); background: var(--color-surface-2); }
.seg-opt { min-height: 40px; display: inline-flex; align-items: center; justify-content: center; gap: 5px; border-radius: var(--radius-pill); font-weight: 700; font-size: var(--text-small); color: var(--color-text-2); cursor: pointer; transition: background var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out); }
.seg-opt:hover { text-decoration: none; color: var(--color-text); }
.seg-opt.is-active { background: var(--color-surface); color: var(--color-text); box-shadow: var(--shadow-sm); }

.podium { display: grid; grid-template-columns: 1fr 1.2fr 1fr; gap: var(--space-2); align-items: end; margin: var(--space-4) 0; }
.podium-slot { text-align: center; display: grid; justify-items: center; gap: var(--space-2); padding: var(--space-3) var(--space-2) var(--space-4);
  background: var(--color-surface); border: 1px solid var(--color-divider); border-radius: var(--radius-md); }
.podium-slot.is-first { padding-top: var(--space-5); border-color: color-mix(in srgb, var(--color-gold) 45%, transparent); background: linear-gradient(180deg, color-mix(in srgb, var(--color-gold) 12%, var(--color-surface)) 0%, var(--color-surface) 100%); }
.podium-slot .avatar { box-shadow: var(--shadow-md); }
.podium-name { font-weight: 700; font-size: var(--text-small); max-width: 100%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.podium-value { font-family: var(--font-display); font-weight: var(--font-display-weight); font-size: var(--text-h2); font-variant-numeric: tabular-nums; }
.rank-list { display: grid; gap: var(--space-2); }
.rank-row { display: grid; grid-template-columns: 32px auto 1fr auto; align-items: center; gap: var(--space-3); padding: var(--space-2) var(--space-3);
  background: var(--color-surface); border: 1px solid var(--color-divider); border-radius: var(--radius-md); }
.rank-row.is-me { border-color: color-mix(in srgb, var(--color-accent) 50%, transparent); background: color-mix(in srgb, var(--color-accent) 8%, var(--color-surface)); }
.rank-num { font-family: var(--font-display); font-weight: var(--font-display-weight); font-size: var(--text-h3); color: var(--color-text-3); text-align: center; font-variant-numeric: tabular-nums; }
.rank-name { font-weight: 700; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.rank-sub { font-size: var(--text-caption); color: var(--color-text-3); }
.rank-value { font-weight: 700; font-variant-numeric: tabular-nums; color: var(--color-accent); }
.rank-pin { position: sticky; bottom: calc(var(--tabbar-h) + env(safe-area-inset-bottom) + var(--space-2)); z-index: 5; box-shadow: var(--shadow-lg); }
@media (min-width: 840px) { .rank-pin { bottom: var(--space-4); } }

/* ==========================================================================
   Forms
   ========================================================================== */
.field { display: grid; gap: 6px; }
.field > label, .label { font-size: var(--text-small); font-weight: 700; color: var(--color-text-2); }
.input, .select, .textarea { width: 100%; min-height: var(--control); padding: 0 var(--space-4); border-radius: var(--radius-md);
  background: var(--color-surface-2); border: 1px solid var(--color-divider); color: var(--color-text); font: inherit; font-size: var(--text-body);
  transition: border-color var(--dur-fast) var(--ease-out), box-shadow var(--dur-fast) var(--ease-out); }
.textarea { min-height: 112px; padding: var(--space-3) var(--space-4); resize: vertical; }
.input::placeholder, .textarea::placeholder { color: var(--color-text-3); }
.input:focus, .select:focus, .textarea:focus { outline: none; border-color: var(--color-accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-accent) 25%, transparent); }
.input.is-invalid { border-color: var(--color-accent-2); }
.help { font-size: var(--text-caption); color: var(--color-text-3); letter-spacing: 0; text-transform: none; font-weight: 500; }
.error { font-size: var(--text-small); color: var(--color-accent-2); }
.input-group { display: grid; grid-template-columns: 1fr auto; gap: var(--space-2); }
.input-xl { min-height: 64px; font-family: var(--font-display); font-size: var(--text-display-lg); text-align: center; font-variant-numeric: tabular-nums; }
.stepper { display: grid; grid-template-columns: var(--control) 1fr var(--control); gap: var(--space-2); align-items: center; }

.stars { display: inline-flex; gap: 6px; }
.stars input { position: absolute; opacity: 0; width: 0; height: 0; }
.stars label { width: var(--touch); height: var(--touch); display: grid; place-items: center; color: var(--color-neutral-600); cursor: pointer; transition: color var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-spring); }
.stars label svg { width: 32px; height: 32px; fill: currentColor; stroke: none; }
.stars label:hover { transform: scale(1.1); }
.stars input:checked + label, .stars label.is-on { color: var(--color-accent); }

.emoji-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: var(--space-2); }
.emoji-opt { aspect-ratio: 1; display: grid; place-items: center; font-size: 24px; border-radius: var(--radius-md); background: var(--color-surface-2); border: 2px solid transparent; cursor: pointer; }
.emoji-opt.is-on { border-color: var(--color-accent); background: color-mix(in srgb, var(--color-accent) 16%, transparent); }
.swatches { display: flex; gap: var(--space-2); flex-wrap: wrap; }
.swatch { display: inline-block; flex: none; width: 36px; height: 36px; border-radius: 50%; border: 3px solid transparent; cursor: pointer; }
.swatch.is-on { border-color: var(--color-text); }

/* ==========================================================================
   Feedback: flashes, toast, celebration
   ========================================================================== */
.flash { display: flex; align-items: center; gap: var(--space-2); padding: var(--space-3) var(--space-4); border-radius: var(--radius-md); font-weight: 600; font-size: var(--text-small); margin-bottom: var(--space-3); }
.flash svg { width: 18px; height: 18px; flex: none; }
.flash-ok { background: color-mix(in srgb, var(--color-leaf) 16%, transparent); color: var(--color-leaf); }
.flash-error { background: color-mix(in srgb, var(--color-accent-2) 16%, transparent); color: var(--color-accent-2); }

.celebrate-backdrop { position: fixed; inset: 0; z-index: 60; display: grid; place-items: center; padding: var(--space-4);
  background: color-mix(in srgb, var(--color-bg) 72%, transparent); backdrop-filter: blur(10px); animation: fade-in var(--dur) var(--ease-out); }
.celebrate { width: 100%; max-width: 400px; text-align: center; padding: var(--space-8) var(--space-6) var(--space-6);
  background: var(--color-surface); border: 1px solid color-mix(in srgb, var(--color-accent) 45%, transparent); border-radius: var(--radius-lg); box-shadow: var(--glow-accent), var(--shadow-lg);
  animation: pop-in var(--dur-slow) var(--ease-spring); }
.celebrate .xp { font-family: var(--font-display); font-weight: var(--font-display-weight); font-size: 64px; line-height: 1; letter-spacing: -0.03em;
  background: var(--grad-sunset); -webkit-background-clip: text; background-clip: text; color: transparent; font-variant-numeric: tabular-nums; }
.celebrate h2 { margin: var(--space-2) 0 var(--space-1); }
.celebrate .badge-row { justify-content: center; margin: var(--space-4) 0; }
.confetti { position: fixed; inset: 0; z-index: 61; pointer-events: none; }

@keyframes fade-in { from { opacity: 0; } to { opacity: 1; } }
@keyframes pop-in { from { opacity: 0; transform: scale(0.85) translateY(12px); } to { opacity: 1; transform: none; } }
@keyframes rise { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }
.rise { animation: rise var(--dur) var(--ease-out) both; }
.rise-2 { animation-delay: 60ms; } .rise-3 { animation-delay: 120ms; } .rise-4 { animation-delay: 180ms; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 1ms !important; transition-duration: 1ms !important; }
}

/* ==========================================================================
   Additions v1.1 (from the screen pass): read-only rating, date inputs,
   log-history row, cover art stand-in, logged-out page, hero brand mark
   ========================================================================== */
.rating { display: inline-flex; gap: 2px; color: var(--color-accent); }
.rating svg { width: 14px; height: 14px; fill: currentColor; stroke: none; }
.rating svg.is-off { color: var(--color-neutral-600); }
.input[type="date"] { min-width: 0; padding: 0 var(--space-3); }
.log-row { display: grid; grid-template-columns: 52px 1fr auto; gap: var(--space-3); align-items: baseline; padding: var(--space-3) 0; border-bottom: 1px solid var(--color-divider); }
.log-row:first-child { padding-top: 0; } .log-row:last-child { border-bottom: 0; padding-bottom: 0; }
.log-pages { font-family: var(--font-mono); font-size: var(--text-small); color: var(--color-accent); font-variant-numeric: tabular-nums; }
.cover-art { position: absolute; inset: 0; background: var(--grad-dusk); }
.page-plain { padding-bottom: calc(env(safe-area-inset-bottom) + var(--space-6)); }
.brand-mark-lg { width: 72px; height: 72px; border-radius: 22px; }
.brand-mark-lg svg { width: 40px; height: 40px; }

/* ==========================================================================
   Additions v1.2 (from the frontend pass): hidden attribute, confetti canvas,
   native-input pickers, hero progress, Home desktop composition
   ========================================================================== */
[hidden] { display: none !important; }
canvas.confetti { width: 100%; height: 100%; }
.pick { position: relative; }
.pick input { position: absolute; opacity: 0; width: 0; height: 0; }
.pick input:checked + .emoji-opt { border-color: var(--color-accent); background: color-mix(in srgb, var(--color-accent) 16%, transparent); }
.pick input:checked + .swatch { border-color: var(--color-text); }
.pick input:focus-visible + .emoji-opt, .pick input:focus-visible + .swatch { outline: 2px solid var(--color-accent); outline-offset: 2px; }
.card-hero .progress { background: color-mix(in srgb, var(--color-neutral-100) 26%, transparent); }
.col-side { margin-top: var(--space-3); }
@media (min-width: 840px) {
  .col-main { grid-column: span 2; }
  .col-side { grid-row: span 2; margin-top: 0; }
  .stack-from-desk { display: grid; grid-template-columns: 1fr; gap: var(--space-3); }
  .ring-desk-lg { width: 148px; height: 148px; }
  .ring-desk-lg .ring-center .stat-num { font-size: 40px; }
}

/* ==========================================================================
   v2.0 "Fun pass" (LOCKED): Readers avatar palette, mascot, motion catalog
   ========================================================================== */
:root {
  /* Readers avatar palette. Backgrounds are sticker tints; skins are six real tones;
     hair and shirts are bold flats. Only these values may appear in an avatar. */
  --avatar-bg-1: #F5B942; --avatar-bg-2: #FF6B6B; --avatar-bg-3: #5EDAA8; --avatar-bg-4: #7C8CFF;
  --avatar-bg-5: #B57BFF; --avatar-bg-6: #FF9F68; --avatar-bg-7: #4FC3F7; --avatar-bg-8: #F48FB1;
  --skin-1: #F6D3B8; --skin-2: #E8B894; --skin-3: #C98D62; --skin-4: #A0683F; --skin-5: #7A4B2A; --skin-6: #4E3020;
  --hair-1: #1B1B2F; --hair-2: #3B2416; --hair-3: #6B3E22; --hair-4: #B5542B; --hair-5: #E9C27E; --hair-6: #7C8CFF; --hair-7: #F48FB1; --hair-8: #5EDAA8;
  --shirt-1: #F4F1EA; --shirt-2: #212546; --shirt-3: #F5B942; --shirt-4: #5EDAA8; --shirt-5: #7C8CFF; --shirt-6: #FF6B6B;
  --ink-line: #1B1B2F;            /* the one outline color in avatars and the mascot */
  --dur-joy: 420ms;               /* every "little joy" animation */
}

/* Sticker frame for avatars: a rounded square with a soft lift. */
.sticker { display: inline-grid; place-items: center; border-radius: 26%; overflow: hidden; background: var(--color-surface-2); box-shadow: var(--shadow-sm); flex: none; }
.sticker svg { width: 100%; height: 100%; display: block; }
.sticker-sm { width: 32px; height: 32px; } .sticker-md { width: 44px; height: 44px; } .sticker-lg { width: 72px; height: 72px; }
.sticker-xl { width: 120px; height: 120px; border-radius: 28px; box-shadow: var(--shadow-md); } .sticker-xxl { width: 168px; height: 168px; border-radius: 36px; box-shadow: var(--shadow-lg); }
.sticker.is-ring { box-shadow: 0 0 0 3px var(--color-accent), var(--shadow-sm); }

/* Avatar builder */
.builder { display: grid; gap: var(--space-4); }
.builder-preview { display: grid; place-items: center; padding: var(--space-4) 0 var(--space-2); }
.builder-tabs { display: flex; gap: var(--space-2); overflow-x: auto; scrollbar-width: none; padding-bottom: 2px; }
.builder-tab { flex: none; min-height: 36px; padding: 0 var(--space-3); border-radius: var(--radius-pill); background: var(--color-surface-2); color: var(--color-text-2); font-weight: 700; font-size: var(--text-small); border: 0; cursor: pointer; }
.builder-tab.is-active { background: var(--color-accent); color: var(--color-on-accent); }
.builder-options { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-2); }
.builder-opt { aspect-ratio: 1; display: grid; place-items: center; border-radius: var(--radius-md); background: var(--color-surface-2); border: 2px solid transparent; cursor: pointer; padding: 6px; transition: transform var(--dur-fast) var(--ease-spring), border-color var(--dur-fast) var(--ease-out); }
.builder-opt:active { transform: scale(0.92); }
.builder-opt.is-on { border-color: var(--color-accent); background: color-mix(in srgb, var(--color-accent) 16%, transparent); }
.builder-opt svg { width: 100%; height: 100%; }
.builder-opt.is-swatch { padding: 10px; } .builder-opt.is-swatch > span { display: block; width: 100%; height: 100%; border-radius: 50%; }

/* Onboarding steps */
.steps { display: flex; justify-content: center; gap: 8px; margin: var(--space-2) 0 var(--space-4); }
.step-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--color-neutral-700); transition: width var(--dur) var(--ease-spring), background var(--dur) var(--ease-out); }
.step-dot.is-active { width: 28px; border-radius: 4px; background: var(--color-accent); }
.step-dot.is-done { background: var(--color-leaf); }
.goal-slider { width: 100%; accent-color: var(--color-accent); height: 44px; }
.goal-big { font-family: var(--font-display); font-weight: var(--font-display-weight); font-size: 88px; line-height: 1; letter-spacing: -0.04em; background: var(--grad-sunset); -webkit-background-clip: text; background-clip: text; color: transparent; font-variant-numeric: tabular-nums; }

/* Mascot (Nocto the owl) */
.mascot { width: 120px; height: 120px; display: inline-block; }
.mascot-sm { width: 72px; height: 72px; } .mascot-lg { width: 180px; height: 180px; }
.mascot .owl-eyelid { transform-origin: center; animation: blink 4.5s infinite; }
.mascot .owl-eyelid.second { animation-delay: 0.12s; }
.mascot.is-cheer { animation: bob 1.2s var(--ease-spring) infinite; }
.mascot .owl-lamp-glow { animation: glow 2.4s ease-in-out infinite; }

/* Motion catalog: the little joys. Each is a class the markup opts into. */
@keyframes blink { 0%, 92%, 100% { transform: scaleY(0); } 94%, 98% { transform: scaleY(1); } }
@keyframes bob { 0%, 100% { transform: translateY(0) rotate(-2deg); } 50% { transform: translateY(-8px) rotate(2deg); } }
@keyframes glow { 0%, 100% { opacity: 0.55; } 50% { opacity: 1; } }
@keyframes pop { 0% { transform: scale(1); } 40% { transform: scale(1.18); } 100% { transform: scale(1); } }
@keyframes wobble { 0% { transform: rotate(0); } 25% { transform: rotate(-6deg) scale(1.04); } 50% { transform: rotate(5deg) scale(1.06); } 75% { transform: rotate(-3deg) scale(1.02); } 100% { transform: rotate(0); } }
@keyframes flicker { 0%, 100% { transform: scale(1) rotate(-2deg); } 30% { transform: scale(1.08) rotate(2deg); } 60% { transform: scale(0.96) rotate(-1deg); } }
@keyframes shimmer { 0% { transform: translateX(-120%); } 100% { transform: translateX(220%); } }
@keyframes bounce { 0% { transform: translateY(0); } 35% { transform: translateY(-6px) scale(1.08); } 70% { transform: translateY(2px); } 100% { transform: translateY(0); } }
@keyframes burst { 0% { transform: scale(0.3); opacity: 1; } 100% { transform: scale(1.9); opacity: 0; } }
@keyframes shine { 0% { transform: translateX(-150%) rotate(20deg); } 100% { transform: translateX(250%) rotate(20deg); } }
@keyframes float-up { 0% { opacity: 0; transform: translate(-50%, 10px) scale(0.9); } 15% { opacity: 1; transform: translate(-50%, 0) scale(1); } 80% { opacity: 1; } 100% { opacity: 0; transform: translate(-50%, -24px); } }
@keyframes page-turn { 0% { opacity: 0; transform: perspective(600px) rotateY(-14deg) translateX(8px); } 100% { opacity: 1; transform: none; } }
@keyframes tada { 0% { transform: scale(1); } 10%, 20% { transform: scale(0.92) rotate(-3deg); } 30%, 50%, 70% { transform: scale(1.08) rotate(3deg); } 40%, 60% { transform: scale(1.08) rotate(-3deg); } 100% { transform: scale(1); } }

.pop { animation: pop var(--dur-joy) var(--ease-spring); }
.wobble { animation: wobble 560ms var(--ease-spring); }
.tada { animation: tada 900ms var(--ease-out); }
.chip-streak.is-lit svg { animation: flicker 1.6s ease-in-out infinite; transform-origin: 50% 80%; }
.progress-fill { position: relative; overflow: hidden; }
.progress-fill::after { content: ""; position: absolute; inset: 0; width: 40%; background: linear-gradient(90deg, transparent, rgba(255,255,255,0.35), transparent); transform: translateX(-120%); }
.progress-fill.is-shimmer::after { animation: shimmer 1.4s var(--ease-out) 1; }
.tab.is-active svg { animation: bounce 420ms var(--ease-spring); }
.cover-tilt { transition: transform var(--dur) var(--ease-spring); }
.cover-tilt:hover, .cover-tilt:active { transform: rotate(-3deg) scale(1.04); }
.kudos { position: relative; }
.kudos.is-burst::before { content: ""; position: absolute; inset: -6px; border-radius: 50%; pointer-events: none;
  background: radial-gradient(circle, color-mix(in srgb, var(--color-accent-2) 55%, transparent) 0 18%, transparent 22%),
    radial-gradient(circle at 20% 30%, var(--color-accent) 0 6%, transparent 8%), radial-gradient(circle at 80% 30%, var(--color-leaf) 0 6%, transparent 8%),
    radial-gradient(circle at 25% 80%, var(--color-sky) 0 6%, transparent 8%), radial-gradient(circle at 78% 78%, var(--color-grape) 0 6%, transparent 8%);
  animation: burst var(--dur-joy) var(--ease-out) forwards; }
.badge-icon { position: relative; overflow: hidden; }
.badge.is-new .badge-icon::after { content: ""; position: absolute; top: -20%; bottom: -20%; width: 35%; background: linear-gradient(90deg, transparent, rgba(255,255,255,0.7), transparent); animation: shine 1.1s var(--ease-out) 2; }
.badge.is-new { animation: tada 900ms var(--ease-out); }
.xp-float { position: fixed; left: 50%; top: calc(env(safe-area-inset-top) + 72px); z-index: 70; transform: translateX(-50%); pointer-events: none;
  font-family: var(--font-display); font-weight: var(--font-display-weight); font-size: var(--text-h1); color: var(--color-accent); text-shadow: 0 2px 12px color-mix(in srgb, var(--color-accent) 60%, transparent);
  animation: float-up 1.6s var(--ease-out) forwards; }
.page-turn { animation: page-turn var(--dur) var(--ease-out) both; }
.brand-mark:active { animation: wobble 560ms var(--ease-spring); }
.sticker.is-new { animation: tada 900ms var(--ease-out); }
.builder-opt:focus-within { outline: 2px solid var(--color-accent); outline-offset: 2px; }