/* ============================================================
   Padi Tamil — visual system
   Warm palm-leaf parchment, turmeric accent, huge friendly type.
   Designed for 6-year-olds and 80-year-olds: big targets, high
   contrast, one decision per screen.
   ============================================================ */

:root{
  --r-lg:22px;
  --r-md:16px;
  --r-sm:11px;
  --shadow:0 2px 0 rgba(16,24,40,.05), 0 10px 28px -18px rgba(16,24,40,.45);
  --tap:60px;
  --ta:"Noto Sans Tamil","Nirmala UI","Latha","Tamil Sangam MN",sans-serif;
  --ui:"Nunito",system-ui,-apple-system,"Segoe UI",sans-serif;
}

/* ============================================================
   Themes. Every colour in the app comes from these tokens, so a
   theme is one block of variables and nothing else.

   Two independent choices, both stamped on <html> before first paint:
     data-theme   which palette      (mayil / malligai / kolam / ink / suvadi)
     data-scheme  light, dark, auto  (absent = auto = follow the device)

   Auto is the default. The device media query is guarded with
   :not([data-scheme="light"]) so an explicit Light choice survives a
   phone that is in dark mode - which is most phones.
   ============================================================ */

/* ---------- Mayil: peacock (default) ---------- */
:root, :root[data-theme="mayil"], [data-theme="mayil"]{
  --paper:#F1F6F3;
  --paper-2:#E3EDE8;
  --card:#FBFDFC;
  --ink:#15302A;
  --ink-2:#456158;
  --muted:#779188;
  --line:#D3E2DB;
  --gold:#12766B;
  --gold-deep:#0E5C53;
  --gold-shade:#0A4740;
  --on-gold:#FFFFFF;
  --teal:#437A36;
  --teal-shade:#3E7231;
  --teal-soft:#EAF4E6;
  --teal-line:#BEDCB2;
  --on-teal:#FFFFFF;
  --red:#AC5039;
  --red-soft:#FAEFEB;
  --red-line:#E7C3B6;
  --hero-a:#E6F2EC;
  --hero-b:#D6EAE1;
  --hero-line:#BCDCD0;
  --shadow:0 2px 0 rgba(21,48,42,.04), 0 10px 28px -18px rgba(21,48,42,.35);
}
@media (prefers-color-scheme: dark){
  :root:not([data-scheme="light"]), :root[data-theme="mayil"]:not([data-scheme="light"]),
  [data-theme="mayil"]:not([data-scheme="light"]){
    --paper:#0E1A18;
    --paper-2:#162523;
    --card:#132220;
    --ink:#DCE9E4;
    --ink-2:#A6BFB7;
    --muted:#6F8B83;
    --line:#22352F;
    --gold:#4FB79F;
    --gold-deep:#83D6C0;
    --gold-shade:#37866F;
    --on-gold:#07201B;
    --teal:#7CC46B;
    --teal-shade:#5FA451;
    --teal-soft:#132A18;
    --teal-line:#2A5030;
    --on-teal:#07201B;
    --red:#E08A72;
    --red-soft:#2A1712;
    --red-line:#4A2A20;
    --hero-a:#16302B;
    --hero-b:#0F231F;
    --hero-line:#24443C;
    --shadow:0 2px 0 rgba(0,0,0,.28), 0 10px 28px -18px #000;
  }
}
:root[data-scheme="dark"], :root[data-theme="mayil"][data-scheme="dark"], [data-theme="mayil"][data-scheme="dark"]{
  --paper:#0E1A18;
  --paper-2:#162523;
  --card:#132220;
  --ink:#DCE9E4;
  --ink-2:#A6BFB7;
  --muted:#6F8B83;
  --line:#22352F;
  --gold:#4FB79F;
  --gold-deep:#83D6C0;
  --gold-shade:#37866F;
  --on-gold:#07201B;
  --teal:#7CC46B;
  --teal-shade:#5FA451;
  --teal-soft:#132A18;
  --teal-line:#2A5030;
  --on-teal:#07201B;
  --red:#E08A72;
  --red-soft:#2A1712;
  --red-line:#4A2A20;
  --hero-a:#16302B;
  --hero-b:#0F231F;
  --hero-line:#24443C;
  --shadow:0 2px 0 rgba(0,0,0,.28), 0 10px 28px -18px #000;
}

/* ---------- Malligai: jasmine ---------- */
:root[data-theme="malligai"], [data-theme="malligai"]{
  --paper:#FBFDF8;
  --paper-2:#EFF5E9;
  --card:#FFFFFF;
  --ink:#16261A;
  --ink-2:#48604D;
  --muted:#80947A;
  --line:#DDE8D6;
  --gold:#39823C;
  --gold-deep:#2F6B33;
  --gold-shade:#255529;
  --on-gold:#FFFFFF;
  --teal:#0E7490;
  --teal-shade:#155E75;
  --teal-soft:#ECFEFF;
  --teal-line:#A5DDE9;
  --on-teal:#FFFFFF;
  --red:#C0392B;
  --red-soft:#FDF0EE;
  --red-line:#EFC0B9;
  --hero-a:#F0F9EA;
  --hero-b:#E2F2D8;
  --hero-line:#C9E3B9;
}
@media (prefers-color-scheme: dark){
  :root[data-theme="malligai"]:not([data-scheme="light"]),
  [data-theme="malligai"]:not([data-scheme="light"]){
    --paper:#08130B;
    --paper-2:#112016;
    --card:#0D1A11;
    --ink:#E8F3E7;
    --ink-2:#B0C8B2;
    --muted:#7C9680;
    --line:#1E3524;
    --gold:#6EC46F;
    --gold-deep:#A6E3A1;
    --gold-shade:#4E9E52;
    --on-gold:#08210A;
    --teal:#38BDF8;
    --teal-shade:#0EA5E9;
    --teal-soft:#06232E;
    --teal-line:#0C4A6E;
    --on-teal:#04161F;
    --red:#F87171;
    --red-soft:#2A1414;
    --red-line:#57221F;
    --hero-a:#122A17;
    --hero-b:#0C1D0F;
    --hero-line:#20422A;
    --shadow:0 2px 0 rgba(0,0,0,.35), 0 10px 28px -18px #000;
  }
}
:root[data-theme="malligai"][data-scheme="dark"], [data-theme="malligai"][data-scheme="dark"]{
  --paper:#08130B;
  --paper-2:#112016;
  --card:#0D1A11;
  --ink:#E8F3E7;
  --ink-2:#B0C8B2;
  --muted:#7C9680;
  --line:#1E3524;
  --gold:#6EC46F;
  --gold-deep:#A6E3A1;
  --gold-shade:#4E9E52;
  --on-gold:#08210A;
  --teal:#38BDF8;
  --teal-shade:#0EA5E9;
  --teal-soft:#06232E;
  --teal-line:#0C4A6E;
  --on-teal:#04161F;
  --red:#F87171;
  --red-soft:#2A1414;
  --red-line:#57221F;
  --hero-a:#122A17;
  --hero-b:#0C1D0F;
  --hero-line:#20422A;
  --shadow:0 2px 0 rgba(0,0,0,.35), 0 10px 28px -18px #000;
}

/* ---------- Kolam: midnight and saffron ---------- */
:root[data-theme="kolam"], [data-theme="kolam"]{
  --paper:#F8F9FC;
  --paper-2:#ECEFF6;
  --card:#FFFFFF;
  --ink:#131A33;
  --ink-2:#4B5578;
  --muted:#848DA8;
  --line:#DDE2EE;
  --gold:#E8912B;
  --gold-deep:#A05F13;
  --gold-shade:#9A5B10;
  --on-gold:#24160A;
  --teal:#0F766E;
  --teal-shade:#115E59;
  --teal-soft:#ECFDFA;
  --teal-line:#9BDDD5;
  --on-teal:#FFFFFF;
  --red:#D32222;
  --red-soft:#FEF2F2;
  --red-line:#F6C6C2;
  --hero-a:#FFF3E0;
  --hero-b:#FFE7C4;
  --hero-line:#F5D3A0;
}
@media (prefers-color-scheme: dark){
  :root[data-theme="kolam"]:not([data-scheme="light"]),
  [data-theme="kolam"]:not([data-scheme="light"]){
    --paper:#070B1A;
    --paper-2:#111838;
    --card:#0E1430;
    --ink:#EDF0FA;
    --ink-2:#B3BCD8;
    --muted:#7A85A6;
    --line:#212A50;
    --gold:#FFB43D;
    --gold-deep:#FFC773;
    --gold-shade:#C9832A;
    --on-gold:#241505;
    --teal:#2DD4BF;
    --teal-shade:#14B8A6;
    --teal-soft:#06251F;
    --teal-line:#12564C;
    --on-teal:#04201C;
    --red:#FB7185;
    --red-soft:#2B1018;
    --red-line:#59202E;
    --hero-a:#151E46;
    --hero-b:#0D1330;
    --hero-line:#2A3566;
    --shadow:0 2px 0 rgba(0,0,0,.35), 0 10px 28px -18px #000;
  }
}
:root[data-theme="kolam"][data-scheme="dark"], [data-theme="kolam"][data-scheme="dark"]{
  --paper:#070B1A;
  --paper-2:#111838;
  --card:#0E1430;
  --ink:#EDF0FA;
  --ink-2:#B3BCD8;
  --muted:#7A85A6;
  --line:#212A50;
  --gold:#FFB43D;
  --gold-deep:#FFC773;
  --gold-shade:#C9832A;
  --on-gold:#241505;
  --teal:#2DD4BF;
  --teal-shade:#14B8A6;
  --teal-soft:#06251F;
  --teal-line:#12564C;
  --on-teal:#04201C;
  --red:#FB7185;
  --red-soft:#2B1018;
  --red-line:#59202E;
  --hero-a:#151E46;
  --hero-b:#0D1330;
  --hero-line:#2A3566;
  --shadow:0 2px 0 rgba(0,0,0,.35), 0 10px 28px -18px #000;
}

/* ---------- Ink & Paper ---------- */
:root[data-theme="ink"], [data-theme="ink"]{
  --paper:#FFFFFF;
  --paper-2:#F1F4F9;
  --card:#FFFFFF;
  --ink:#0F172A;
  --ink-2:#475569;
  --muted:#7C8CA3;
  --line:#E2E8F0;
  --gold:#4F46E5;
  --gold-deep:#4338CA;
  --gold-shade:#3730A3;
  --on-gold:#FFFFFF;
  --teal:#047857;
  --teal-shade:#065F46;
  --teal-soft:#ECFDF5;
  --teal-line:#A7E3C8;
  --on-teal:#FFFFFF;
  --red:#D32222;
  --red-soft:#FEF2F2;
  --red-line:#F6C6C2;
  --hero-a:#EEF2FF;
  --hero-b:#E0E7FF;
  --hero-line:#C7D2FE;
}
@media (prefers-color-scheme: dark){
  :root[data-theme="ink"]:not([data-scheme="light"]),
  [data-theme="ink"]:not([data-scheme="light"]){
    --paper:#0B1020;
    --paper-2:#161C2D;
    --card:#131A2A;
    --ink:#E9EEF7;
    --ink-2:#AFBACB;
    --muted:#78889F;
    --line:#262F42;
    --gold:#5A51E0;
    --gold-deep:#A5B4FC;
    --gold-shade:#4338CA;
    --on-gold:#FFFFFF;
    --teal:#10B981;
    --teal-shade:#059669;
    --teal-soft:#0B2A22;
    --teal-line:#155E48;
    --on-teal:#04160F;
    --red:#F87171;
    --red-soft:#2C1416;
    --red-line:#5B2422;
    --hero-a:#1B2340;
    --hero-b:#141A2E;
    --hero-line:#2B3557;
    --shadow:0 2px 0 rgba(0,0,0,.3), 0 10px 28px -18px #000;
  }
}
:root[data-theme="ink"][data-scheme="dark"], [data-theme="ink"][data-scheme="dark"]{
  --paper:#0B1020;
  --paper-2:#161C2D;
  --card:#131A2A;
  --ink:#E9EEF7;
  --ink-2:#AFBACB;
  --muted:#78889F;
  --line:#262F42;
  --gold:#5A51E0;
  --gold-deep:#A5B4FC;
  --gold-shade:#4338CA;
  --on-gold:#FFFFFF;
  --teal:#10B981;
  --teal-shade:#059669;
  --teal-soft:#0B2A22;
  --teal-line:#155E48;
  --on-teal:#04160F;
  --red:#F87171;
  --red-soft:#2C1416;
  --red-line:#5B2422;
  --hero-a:#1B2340;
  --hero-b:#141A2E;
  --hero-line:#2B3557;
  --shadow:0 2px 0 rgba(0,0,0,.3), 0 10px 28px -18px #000;
}

/* ---------- Suvadi: palm leaf ---------- */
:root[data-theme="suvadi"], [data-theme="suvadi"]{
  --paper:#FDF8F0;
  --paper-2:#F6EEE1;
  --card:#FFFFFF;
  --ink:#2B2118;
  --ink-2:#6B5B49;
  --muted:#8B7A66;
  --line:#E7DBC7;
  --gold:#E8A33D;
  --gold-deep:#996314;
  --gold-shade:#A66A14;
  --on-gold:#3A2603;
  --teal:#1C7061;
  --teal-shade:#14574C;
  --teal-soft:#E4F1EE;
  --teal-line:#B9DCD4;
  --on-teal:#FFFFFF;
  --red:#B84129;
  --red-soft:#FBEAE6;
  --red-line:#F0C8BE;
  --hero-a:#FFF6E6;
  --hero-b:#FDECD2;
  --hero-line:#F0DCB8;
}
@media (prefers-color-scheme: dark){
  :root[data-theme="suvadi"]:not([data-scheme="light"]),
  [data-theme="suvadi"]:not([data-scheme="light"]){
    --paper:#191512;
    --paper-2:#221C17;
    --card:#241E19;
    --ink:#F5EDE2;
    --ink-2:#C9BAA7;
    --muted:#9E8D79;
    --line:#3A3026;
    --gold:#E8A33D;
    --gold-deep:#E8A33D;
    --gold-shade:#A66A14;
    --on-gold:#241505;
    --teal:#3FBFA6;
    --teal-shade:#1F7A6B;
    --teal-soft:#12312C;
    --teal-line:#1F5348;
    --on-teal:#06211C;
    --red:#E8776A;
    --red-soft:#3A1E18;
    --red-line:#5E2E24;
    --hero-a:#2C2318;
    --hero-b:#241C13;
    --hero-line:#3D3020;
    --shadow:0 2px 0 rgba(0,0,0,.3), 0 10px 28px -18px #000;
  }
}
:root[data-theme="suvadi"][data-scheme="dark"], [data-theme="suvadi"][data-scheme="dark"]{
  --paper:#191512;
  --paper-2:#221C17;
  --card:#241E19;
  --ink:#F5EDE2;
  --ink-2:#C9BAA7;
  --muted:#9E8D79;
  --line:#3A3026;
  --gold:#E8A33D;
  --gold-deep:#E8A33D;
  --gold-shade:#A66A14;
  --on-gold:#241505;
  --teal:#3FBFA6;
  --teal-shade:#1F7A6B;
  --teal-soft:#12312C;
  --teal-line:#1F5348;
  --on-teal:#06211C;
  --red:#E8776A;
  --red-soft:#3A1E18;
  --red-line:#5E2E24;
  --hero-a:#2C2318;
  --hero-b:#241C13;
  --hero-line:#3D3020;
  --shadow:0 2px 0 rgba(0,0,0,.3), 0 10px 28px -18px #000;
}

*{box-sizing:border-box; -webkit-tap-highlight-color:transparent}
html,body{margin:0;padding:0}
body{
  background:var(--paper); color:var(--ink); font-family:var(--ui);
  font-size:17px; line-height:1.5;
  padding-top:calc(58px + env(safe-area-inset-top));
  padding-bottom:calc(78px + env(safe-area-inset-bottom));
  overscroll-behavior-y:contain;
}
:lang(ta), .ta{font-family:var(--ta)}

/* ---------- chrome ---------- */
#topbar{
  position:fixed; inset:0 0 auto 0; height:calc(58px + env(safe-area-inset-top));
  padding:env(safe-area-inset-top) 10px 0; display:flex; align-items:center; gap:6px;
  background:color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter:blur(12px); border-bottom:1px solid var(--line); z-index:40;
}
#topTitle{flex:1; text-align:center; font-weight:800; font-size:17px; letter-spacing:.2px}
.icon-btn{
  width:44px;height:44px;border:0;border-radius:12px;background:transparent;
  color:var(--ink); font-size:22px; cursor:pointer; display:grid;place-items:center;
}
.icon-btn:active{background:var(--paper-2)}
.icon-btn[hidden]{visibility:hidden;display:grid}
#backBtn{font-size:34px;line-height:0;padding-bottom:6px}
.muted-icon{opacity:.32}

#tabbar{
  position:fixed; inset:auto 0 0 0; display:grid; grid-template-columns:repeat(5,1fr);
  background:color-mix(in srgb, var(--paper) 92%, transparent); backdrop-filter:blur(12px);
  border-top:1px solid var(--line); padding-bottom:env(safe-area-inset-bottom); z-index:40;
}
#tabbar a{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;
  height:66px; text-decoration:none; color:var(--muted); font-size:11.5px; font-weight:700;
  position:relative;
}
#tabbar a{font-size:10.5px}
#tabbar a span{font-size:20px;line-height:1}
#tabbar a.on{color:var(--gold-deep)}
#tabbar em{
  position:absolute; top:10px; right:calc(50% - 24px); min-width:9px;height:9px;
  border-radius:9px; background:var(--red);
}

#app{padding:16px 16px 40px; max-width:640px; margin:0 auto; outline:none}

#toast{
  position:fixed; left:50%; bottom:96px; transform:translate(-50%,20px);
  background:var(--ink); color:var(--paper); padding:11px 18px; border-radius:99px;
  font-weight:700; font-size:14.5px; opacity:0; pointer-events:none; transition:.25s; z-index:60;
  max-width:90vw; text-align:center;
}
#toast.show{opacity:1; transform:translate(-50%,0)}

/* ---------- primitives ---------- */
.card{
  background:var(--card); border:1px solid var(--line); border-radius:var(--r-lg);
  padding:18px; box-shadow:var(--shadow);
}
.btn{
  display:flex;align-items:center;justify-content:center;gap:10px;
  width:100%; min-height:var(--tap); padding:14px 18px; border:0; border-radius:var(--r-md);
  background:var(--gold); color:var(--on-gold); font-weight:800; font-size:18px; cursor:pointer;
  box-shadow:0 3px 0 var(--gold-shade); transition:transform .06s, box-shadow .06s;
  font-family:var(--ui);
}
.btn:active{transform:translateY(3px); box-shadow:0 0 0 var(--gold-shade)}
.btn.ghost{background:transparent;color:var(--ink);box-shadow:none;border:2px solid var(--line)}
.btn.ghost:active{transform:none;background:var(--paper-2)}
.btn.teal{background:var(--teal);color:var(--on-teal);box-shadow:0 3px 0 var(--teal-shade)}
.btn.teal:active{box-shadow:0 0 0 var(--teal-shade)}
.btn[disabled]{opacity:.4;pointer-events:none}
.btn.sm{min-height:44px;font-size:15px;padding:8px 14px;width:auto}

.row{display:flex;gap:10px}
.row>*{flex:1}
.stack>*+*{margin-top:12px}
.center{text-align:center}
.h1{font-size:26px;font-weight:800;letter-spacing:-.3px;margin:0 0 4px}
.h2{font-size:19px;font-weight:800;margin:26px 0 10px}
.sub{color:var(--muted);font-size:15px;margin:0}
.kicker{font-size:12px;font-weight:800;letter-spacing:1.4px;text-transform:uppercase;color:var(--gold-deep)}
.pill{display:inline-block;background:var(--paper-2);border:1px solid var(--line);border-radius:99px;padding:3px 11px;font-size:13px;font-weight:700;color:var(--ink-2)}

/* ---------- glyphs ---------- */
.glyph{font-family:var(--ta); line-height:1.25; font-weight:500}
.glyph-xl{font-size:clamp(92px,30vw,170px)}
.glyph-lg{font-size:clamp(56px,16vw,86px)}
.glyph-md{font-size:38px}
.roman{font-weight:800; color:var(--gold-deep); font-size:22px; letter-spacing:.5px}
.tag{font-size:13px;color:var(--muted);font-weight:700}

/* ---------- home / path ---------- */
.hero{
  background:linear-gradient(150deg, var(--hero-a), var(--hero-b));
  border:1px solid var(--hero-line); border-radius:var(--r-lg); padding:20px; margin-bottom:8px;
}
.hero .big{font-size:40px;font-family:var(--ta);line-height:1}
.streak{display:flex;gap:18px;margin-top:14px}
.streak div{font-size:13px;color:var(--ink-2);font-weight:700}
.streak b{display:block;font-size:24px;color:var(--ink);font-weight:800}

.unit{
  display:flex; align-items:center; gap:14px; width:100%; text-align:left;
  background:var(--card); border:1px solid var(--line); border-radius:var(--r-lg);
  padding:14px 16px; margin-bottom:10px; cursor:pointer; box-shadow:var(--shadow);
  font-family:var(--ui); color:var(--ink);
}
.unit:active{transform:scale(.99)}
.unit .bubble{
  width:56px;height:56px;flex:0 0 56px;border-radius:18px;display:grid;place-items:center;
  background:var(--paper-2); border:1px solid var(--line);
  font-family:var(--ta); font-size:26px; font-weight:600; color:var(--ink-2);
}
.unit.done .bubble{background:var(--teal-soft);border-color:var(--teal-line);color:var(--teal)}
.unit.next .bubble{background:var(--gold);border-color:var(--gold-deep);color:var(--on-gold)}
.unit.locked{opacity:.5}
.unit .t{flex:1;min-width:0}
.unit .t b{display:block;font-size:17px;font-weight:800}
.unit .t small{color:var(--muted);font-size:13.5px;font-weight:600}
.unit .chev{color:var(--muted);font-size:26px}
.bar{height:7px;background:var(--paper-2);border-radius:9px;overflow:hidden;margin-top:7px}
.bar i{display:block;height:100%;background:var(--teal);border-radius:9px;transition:width .4s}

/* ---------- lesson ---------- */
.progress-top{height:9px;background:var(--paper-2);border-radius:9px;overflow:hidden;margin-bottom:20px}
.progress-top i{display:block;height:100%;background:var(--gold);transition:width .3s}

.teach{text-align:center;padding:26px 18px}
.teach .glyph-xl{margin:2px 0 6px}
.mnemo{
  background:var(--paper-2);border:1px dashed var(--line);border-radius:var(--r-md);
  padding:13px 15px;margin-top:16px;text-align:left;font-size:15.5px;color:var(--ink-2)
}
.mnemo b{color:var(--ink)}

.opt{
  display:flex;align-items:center;gap:12px;width:100%;min-height:68px;padding:12px 16px;
  background:var(--card);border:2px solid var(--line);border-radius:var(--r-md);
  font-family:var(--ui);font-size:19px;font-weight:700;color:var(--ink);cursor:pointer;text-align:left;
}
.opt:active{background:var(--paper-2)}
.opt.big{min-height:96px;justify-content:center;font-family:var(--ta);font-size:46px;font-weight:500}
.opt small{display:block;font-size:12.5px;color:var(--muted);font-weight:700;font-family:var(--ui)}
.opt.ok{border-color:var(--teal);background:var(--teal-soft);color:var(--teal)}
.opt.no{border-color:var(--red);background:var(--red-soft);color:var(--red)}
.opt.dim{opacity:.42}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.grid1{display:grid;gap:10px}

.verdict{
  position:sticky; bottom:calc(66px + env(safe-area-inset-bottom));
  margin:18px -16px 0; padding:16px; border-radius:var(--r-lg) var(--r-lg) 0 0;
  border:1px solid var(--line); background:var(--card);
  box-shadow:0 -10px 30px -20px rgba(43,33,24,.7);
}
.verdict.ok{background:var(--teal-soft);border-color:var(--teal-line)}
.verdict.no{background:var(--red-soft);border-color:var(--red-line)}
.verdict .msg{font-weight:800;font-size:18px;margin-bottom:10px;display:flex;align-items:center;gap:8px}
.verdict.ok .msg{color:var(--teal)} .verdict.no .msg{color:var(--red)}

/* ---------- rule cards (the reveal) ---------- */
.rule{padding:22px}
.rule .n{
  width:38px;height:38px;border-radius:12px;background:var(--gold);color:var(--on-gold);
  display:grid;place-items:center;font-weight:800;font-size:18px;margin-bottom:14px
}
.rule h3{margin:0 0 8px;font-size:21px;font-weight:800;line-height:1.25}
.rule p{margin:0;color:var(--ink-2);font-size:16px}
.demo{
  display:flex;align-items:center;justify-content:center;gap:12px;flex-wrap:wrap;
  background:var(--paper-2);border-radius:var(--r-md);padding:18px 12px;margin:16px 0 4px;
  font-family:var(--ta);font-size:42px;font-weight:500; align-items:flex-start
}
.demo .op{font-family:var(--ui);font-size:26px;color:var(--muted);font-weight:800;line-height:1;margin-top:14px}
.demo .lbl{font-family:var(--ui);font-size:12px;color:var(--muted);font-weight:800;display:block;text-align:center;margin-top:2px}
.demo .u{text-align:center}

/* ---------- chart ---------- */
.chart-wrap{overflow:auto;border:1px solid var(--line);border-radius:var(--r-md);background:var(--card);-webkit-overflow-scrolling:touch}
table.chart{border-collapse:separate;border-spacing:0;font-family:var(--ta)}
table.chart th,table.chart td{
  min-width:52px;height:50px;text-align:center;font-size:23px;font-weight:500;
  border-right:1px solid var(--line);border-bottom:1px solid var(--line);padding:0;
}
table.chart thead th{
  position:sticky;top:0;background:var(--paper-2);z-index:2;font-size:19px;color:var(--gold-deep);font-weight:600;
}
table.chart tbody th{
  position:sticky;left:0;background:var(--paper-2);z-index:1;color:var(--gold-deep);font-weight:600;
}
table.chart thead th:first-child{z-index:3;left:0}
table.chart td{cursor:pointer;background:var(--card)}
table.chart td:active{background:var(--paper-2)}
table.chart td.hl{background:var(--teal-soft);color:var(--teal)}
.legend{font-size:13px;color:var(--muted);margin:10px 2px}

/* ---------- write / trace ---------- */
.trace-box{position:relative;margin:0 auto;touch-action:none;border-radius:var(--r-md);overflow:hidden;background:var(--card);border:2px solid var(--line)}
.trace-box canvas{position:absolute;inset:0;width:100%;height:100%;display:block}
.trace-box .rule-lines{position:absolute;inset:0;pointer-events:none}
.score-ring{font-size:15px;font-weight:800;color:var(--ink-2)}

/* ---------- word / sentence ---------- */
.wordcard{text-align:center;padding:24px 16px}
.wordcard .w{font-family:var(--ta);font-size:clamp(44px,13vw,68px);font-weight:600;line-height:1.35;word-break:break-word}
.wordcard .say{font-size:19px;font-weight:800;color:var(--gold-deep);letter-spacing:.5px;margin-top:2px}
.wordcard .mean{font-size:19px;font-weight:700;margin-top:6px}
.chips{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-top:14px}
.chip{
  font-family:var(--ta);font-size:30px;font-weight:500;background:var(--paper-2);
  border:1px solid var(--line);border-radius:12px;padding:6px 14px;min-width:52px;text-align:center;
  color:var(--ink); cursor:pointer;
}
.chip small{display:block;font-family:var(--ui);font-size:11px;color:var(--muted);font-weight:800}
.chip.used{opacity:.25;pointer-events:none}
.slots{
  display:flex;flex-wrap:wrap;gap:8px;justify-content:center;min-height:70px;align-items:center;
  border:2px dashed var(--line);border-radius:var(--r-md);padding:10px;background:var(--paper-2)
}
.slots .chip{background:var(--card)}

.pairbox{display:grid;grid-template-columns:1fr 1fr;gap:12px;text-align:center}
.pairbox>div{background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r-md);padding:14px 8px}
.pairbox .g{font-family:var(--ta);font-size:44px;font-weight:600;line-height:1.2}
.pairbox .m{font-size:14px;font-weight:700;color:var(--ink-2)}
.pairbox .s{font-size:12.5px;color:var(--muted);font-weight:700}

.finish{text-align:center;padding:34px 20px}
.finish .em{font-size:64px;line-height:1}
.list-clean{list-style:none;padding:0;margin:0}
.list-clean li{display:flex;gap:12px;align-items:center;padding:11px 2px;border-bottom:1px solid var(--line)}
.list-clean li:last-child{border-bottom:0}
.list-clean .g{font-family:var(--ta);font-size:30px;font-weight:600;min-width:64px}
.list-clean .m{flex:1;font-weight:700;font-size:15.5px}
.list-clean .s{font-size:13px;color:var(--muted);font-weight:700}
.speaker{background:none;border:0;font-size:22px;cursor:pointer;padding:6px}
.note{font-size:13.5px;color:var(--muted);background:var(--paper-2);border-radius:12px;padding:11px 13px}

/* ---------- spoken-variety picker ---------- */
.variety{
  display:block; width:100%; text-align:left; font-family:var(--ui); color:var(--ink);
  background:var(--card); border:2px solid var(--line); border-radius:var(--r-lg);
  padding:16px; margin-bottom:12px; cursor:pointer; box-shadow:var(--shadow);
}
.variety:active{transform:scale(.99)}
.variety.on{border-color:var(--gold)}
.variety .eg{
  background:var(--paper-2); border-radius:var(--r-md);
  padding:10px 14px; margin-top:10px;
}

/* romanisation shown beside Tamil anywhere the reader may not be able
   to decode the script yet — which, early on, is everywhere */
.rom{
  display:inline-block; margin-left:8px; font-family:var(--ui);
  font-size:13.5px; font-weight:800; color:var(--gold-deep); letter-spacing:.3px;
}
.unit .t b{display:flex; align-items:baseline; flex-wrap:wrap; gap:0}

/* ---------- unit 0 visuals: base letter in ink, added mark in gold ---------- */
.viz{
  display:flex; align-items:flex-end; justify-content:center; gap:14px; flex-wrap:wrap;
  background:var(--paper-2); border-radius:var(--r-md); padding:18px 12px; margin:16px 0 2px;
}
.viz.wrap{gap:10px 12px}
.vcell{display:flex; flex-direction:column; align-items:center; gap:4px}
.vcell img{image-rendering:auto}
.vlbl{font-family:var(--ui); font-size:11.5px; font-weight:800; color:var(--muted); letter-spacing:.2px}
.vnum{font-family:var(--ui); font-size:40px; font-weight:800; line-height:1}
.vrow{display:flex; gap:12px; justify-content:center; flex-wrap:wrap; width:100%}
.viz .op{font-family:var(--ui); font-size:24px; color:var(--muted); font-weight:800; align-self:center}
.rule h3{line-height:1.3}

/* ---------- stories ---------- */
.living{font-family:var(--ta); line-height:1.55}
.living.big{font-size:23px; font-weight:600}
.living .lw{cursor:pointer; border-radius:5px}
.living .lw:active{background:var(--paper-2)}
.living .kn{color:var(--ink)}
.living .un{color:var(--muted); opacity:.42}

.sline{display:flex; gap:10px; align-items:flex-start; padding:13px 0; border-bottom:1px solid var(--line)}
.sline:last-child{border-bottom:0}
.snum{
  flex:0 0 24px; height:24px; border-radius:8px; background:var(--paper-2);
  display:grid; place-items:center; font-size:12px; font-weight:800; color:var(--muted);
}
.sen{font-size:14.5px; font-weight:600; color:var(--ink-2); margin-top:4px}
.moral{background:var(--teal-soft); border-color:var(--teal-line); text-align:center}
.unlock{border-color:var(--gold); cursor:pointer; display:block}
.levelup{background:var(--teal-soft); border-color:var(--teal-line); text-align:center}

.aathi{display:flex; gap:12px; align-items:center; padding:12px 0; border-bottom:1px solid var(--line); cursor:pointer}
.aathi:last-child{border-bottom:0}
.aathi.locked{opacity:.45; cursor:default}
.aletter{
  flex:0 0 42px; height:42px; border-radius:12px; background:var(--paper-2);
  border:1px solid var(--line); display:grid; place-items:center;
  font-family:var(--ta); font-size:22px; font-weight:600; color:var(--gold-deep);
}

.kural{text-align:left}
.kural .kn{font-size:11.5px; font-weight:800; letter-spacing:1px; text-transform:uppercase; color:var(--gold-deep); font-family:var(--ui)}
.kural .kl{font-size:20px; font-weight:600; line-height:1.5; margin-top:2px}

.xpbar{background:var(--card); border:1px solid var(--line); border-radius:var(--r-md); padding:12px 14px}
.goal{display:flex; align-items:center; gap:14px; background:var(--card); border:1px solid var(--line);
      border-radius:var(--r-md); padding:12px 14px; margin-top:10px}
.goal.hit{background:var(--teal-soft); border-color:var(--teal-line)}

/* ---------- theme picker ---------- */
.theme{
  display:block; width:100%; text-align:left; font-family:var(--ui); color:var(--ink);
  background:var(--card); border:2px solid var(--line); border-radius:var(--r-lg);
  padding:15px; margin-bottom:11px; cursor:pointer; box-shadow:var(--shadow);
}
.theme.on{border-color:var(--gold)}
.theme:active{transform:scale(.99)}
.swatches{display:flex; gap:0; flex:0 0 auto; border-radius:9px; overflow:hidden; border:1px solid var(--line)}
.swatches i{display:block; width:26px; height:34px}

/* close the chart's breakdown panel */
#cellPanel{position:relative}
.closex{
  position:absolute; top:6px; right:6px; width:34px; height:34px;
  border:1px solid var(--line); border-radius:10px; background:var(--paper-2);
  color:var(--ink-2); font-size:21px; line-height:1; cursor:pointer;
  display:grid; place-items:center; font-family:var(--ui);
}
.closex:active{background:var(--line)}

/* light / auto / dark */
.seg{display:flex; gap:6px; background:var(--paper-2); border:1px solid var(--line);
     border-radius:14px; padding:5px}
.segbtn{
  flex:1; min-height:44px; border:0; border-radius:10px; background:transparent;
  font-family:var(--ui); font-size:14.5px; font-weight:800; color:var(--ink-2); cursor:pointer;
}
.segbtn.on{background:var(--card); color:var(--ink); box-shadow:var(--shadow)}
.segbtn:active{transform:scale(.98)}
