/* ═══════════ palette ═══════════ */
:root{
  --bg:#FBF7F2;--card:#FFFFFF;--ink:#1E1B19;--ink-2:#5D564F;--ink-3:#938A80;--hair:#EAE2D8;
  --serif:'Playfair Display',Georgia,serif;
  --sans:'Be Vietnam Pro','SF Pro Text',-apple-system,'Helvetica Neue',Arial,sans-serif;
  --r:22px;--r-sm:16px;
  --tabbar:calc(60px + env(safe-area-inset-bottom));
  --a1:#2E8A62;--a2:#1F6B52;--soft:#E7F2EC;--deep:#13412F;
}
[data-c=saffron]{--a1:#F0994C;--a2:#DD6C2C;--soft:#FDEEE0;--deep:#5E2E10}
[data-c=coral]  {--a1:#EE7264;--a2:#D4453F;--soft:#FCEAE7;--deep:#5C1D1A}
[data-c=rose]   {--a1:#E0678F;--a2:#BE3C6C;--soft:#FBE9EF;--deep:#581730}
[data-c=violet] {--a1:#9A7BC8;--a2:#6E4BA3;--soft:#F1EBF8;--deep:#2F1C52}
[data-c=indigo] {--a1:#6C7FD6;--a2:#4253AE;--soft:#E9ECFA;--deep:#1C2559}
[data-c=ocean]  {--a1:#4FA3CE;--a2:#2272A4;--soft:#E6F1F8;--deep:#10364F}
[data-c=teal]   {--a1:#3FAFA4;--a2:#15837B;--soft:#E4F3F1;--deep:#0C3C38}
[data-c=moss]   {--a1:#6FB457;--a2:#3F8A3F;--soft:#ECF5E6;--deep:#1E4320}
[data-c=gold]   {--a1:#E5B53F;--a2:#C18916;--soft:#FBF1DC;--deep:#5A3F06}

*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
[hidden]{display:none!important}
html,body{height:100%;overscroll-behavior:none}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:15px;line-height:1.6;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
button,input{font:inherit;color:inherit}
button{border:0;background:none;cursor:pointer;padding:0}
a{color:inherit;text-decoration:none}
p{margin:0}
svg{width:100%;height:100%;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
:focus-visible{outline:2.5px solid var(--a1);outline-offset:3px;border-radius:8px}
/* Vietnamese stacks two diacritics on one vowel — these need vertical room, never clipping */
h1,h2,h3,.verse-en,blockquote{overflow-wrap:break-word;hyphens:none}
html[lang=vi] .screen-title{line-height:1.3;letter-spacing:0}

/* ═══════════ app shell ═══════════ */
.app{height:100dvh;display:flex;flex-direction:column;overflow:hidden;max-width:560px;margin:0 auto;
  background:var(--bg);position:relative}
@media(min-width:900px){
  body{background:#F0EAE2}
  .app{max-width:1100px;box-shadow:0 0 70px #2b201a14}
}

.appbar{flex:0 0 auto;display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:calc(10px + env(safe-area-inset-top)) 18px 10px;background:#FBF7F2E6;backdrop-filter:blur(14px);
  position:relative;z-index:3;user-select:none}
.brand{display:flex;align-items:center;gap:9px;font-weight:600;font-size:16px;letter-spacing:-.3px}
.brand b{font-weight:300;color:var(--ink-3)}
.enso{width:21px;height:21px;border:2.6px solid #2E8A62;border-right-color:transparent;border-radius:50%;
  transform:rotate(-25deg);flex:0 0 auto}
.appbar-actions{display:flex;align-items:center;gap:6px}
.icon-btn{width:40px;height:40px;display:grid;place-items:center;border-radius:50%;color:var(--ink-2)}
.icon-btn svg{width:21px;height:21px}
.icon-btn:active{background:#0000000d}
.lang-btn{min-width:46px;height:36px;padding:0 12px;border-radius:999px;background:#1E1B190D;
  font-size:12px;font-weight:700;letter-spacing:.6px}
.lang-btn:active{transform:scale(.94)}

/* ═══════════ screens ═══════════ */
.screens{flex:1;min-height:0;position:relative}
.screen{position:absolute;inset:0;overflow-y:auto;overscroll-behavior:contain;-webkit-overflow-scrolling:touch}
.screen[hidden]{display:none}
.screen-inner{padding:6px 18px calc(var(--tabbar) + 28px);animation:rise .32s cubic-bezier(.2,.7,.3,1)}
@keyframes rise{from{opacity:0;transform:translateY(10px)}}

.greeting{font-size:12px;font-weight:600;letter-spacing:1.4px;text-transform:uppercase;color:var(--ink-3);margin-bottom:6px}
.screen-title{font-family:var(--serif);font-weight:600;font-size:clamp(30px,8.5vw,40px);line-height:1.15;
  letter-spacing:-.8px;margin:0 0 10px}
.screen-title em{font-style:italic;color:#DD6C2C}
.screen-sub{color:var(--ink-2);font-size:14px;margin-bottom:18px}
.screen-sub.big{font-size:17px;color:var(--ink);line-height:1.5;font-weight:500}

.row-head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin:26px 0 12px}
.row-head h2{font-size:13px;font-weight:700;letter-spacing:.3px;margin:0}
.row-note{font-size:11px;color:var(--ink-3)}
.row-link{font-size:12px;font-weight:600;color:#DD6C2C}
.row-link:active{opacity:.6}

/* ── hero card ── */
.hero-card{width:100%;display:flex;align-items:center;gap:14px;text-align:left;margin-top:14px;
  padding:20px;border-radius:var(--r);color:#fff;background:linear-gradient(135deg,var(--a1),var(--a2));
  box-shadow:0 14px 30px -12px var(--a2);transition:transform .15s}
.hero-card:active{transform:scale(.975)}
.hero-text{flex:1;min-width:0}
.hero-kicker{display:block;font-size:10px;font-weight:700;letter-spacing:1.6px;opacity:.82;margin-bottom:5px}
.hero-card strong{display:block;font-family:var(--serif);font-weight:600;font-size:22px;line-height:1.22;letter-spacing:-.3px}
.hero-card small{display:block;font-size:12px;opacity:.85;margin-top:5px}
.hero-play{flex:0 0 auto;width:48px;height:48px;border-radius:50%;background:#FFFFFF26;display:grid;place-items:center;
  box-shadow:inset 0 0 0 1.5px #FFFFFF59}
.hero-play svg{width:20px;height:20px;margin-left:3px}

/* ── chips ── */
.chips{display:flex;gap:7px;overflow-x:auto;scrollbar-width:none;padding-bottom:2px;margin:0 -18px;padding-inline:18px}
.chips::-webkit-scrollbar{display:none}
.chips.wrap{flex-wrap:wrap;overflow:visible;margin:0;padding-inline:0}
.chips button{flex:0 0 auto;min-height:40px;padding:0 13px;border-radius:999px;background:var(--card);
  border:1.5px solid var(--hair);font-size:14px;font-weight:600;display:inline-flex;align-items:baseline;gap:4px;
  transition:transform .12s,background .2s,border-color .2s,color .2s}
.chips button small{font-size:10px;font-weight:500;opacity:.6}
.chips button:active{transform:scale(.94)}
.chips button.on{background:var(--ink);border-color:var(--ink);color:#fff}
.chips button.on small{opacity:.7}

/* ── practice tiles ── */
.tiles{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.tile{position:relative;text-align:left;padding:16px 14px 15px;border-radius:var(--r-sm);min-height:116px;
  background:var(--soft);display:flex;flex-direction:column;transition:transform .15s;overflow:hidden}
.tile:active{transform:scale(.965)}
.tile::after{content:'';position:absolute;inset:auto -30px -34px auto;width:84px;height:84px;border-radius:50%;
  background:linear-gradient(135deg,var(--a1),var(--a2));opacity:.14}
.tile-icon{width:34px;height:34px;border-radius:11px;display:grid;place-items:center;font-size:17px;color:#fff;
  background:linear-gradient(135deg,var(--a1),var(--a2));margin-bottom:10px;box-shadow:0 5px 12px -5px var(--a2)}
.tile strong{display:block;font-size:14px;font-weight:600;line-height:1.3;color:var(--deep)}
.tile small{display:block;font-size:11px;line-height:1.45;color:var(--ink-2);margin-top:3px;position:relative;z-index:1}

/* ── verse cards ── */
.verse-card{border-radius:var(--r-sm);padding:18px 18px 16px;margin-bottom:10px;background:var(--card);
  border:1.5px solid var(--hair);border-left:4px solid var(--a1)}
.verse-head{display:flex;align-items:center;gap:9px;margin-bottom:10px}
.verse-dot{width:28px;height:28px;border-radius:9px;display:grid;place-items:center;font-size:15px;color:#fff;
  background:linear-gradient(135deg,var(--a1),var(--a2));flex:0 0 auto}
.verse-title{font-size:13px;font-weight:600;flex:1;min-width:0}
.verse-tag{font-size:9px;font-weight:700;letter-spacing:1.1px;color:var(--a2);background:var(--soft);
  padding:4px 8px;border-radius:999px;white-space:nowrap}
.verse-en{font-family:var(--serif);font-size:18px;line-height:1.52;font-weight:500;margin:0}
.verse-vi{font-size:13px;line-height:1.75;color:var(--ink-2);margin:12px 0 0;padding-top:11px;border-top:1px solid var(--hair)}
mark{background:var(--soft);color:var(--a2);padding:0 3px;border-radius:4px;font-weight:600}
.empty{text-align:center;color:var(--ink-3);font-family:var(--serif);font-size:19px;padding:34px 10px}

/* ── search ── */
.searchbar{display:flex;align-items:center;gap:10px;background:var(--card);border:1.5px solid var(--hair);
  border-radius:999px;padding:0 16px;height:48px;margin-bottom:14px;transition:border-color .2s}
.searchbar:focus-within{border-color:var(--a1)}
.searchbar>svg{width:19px;height:19px;flex:0 0 auto;color:var(--ink-3)}
#search{flex:1;min-width:0;border:0;background:none;height:100%;font-size:15px}
#search:focus{outline:none}
#search::-webkit-search-cancel-button{display:none}
#search-clear{width:26px;height:26px;border-radius:50%;background:#1E1B191A;display:grid;place-items:center;color:var(--ink-2)}
#search-clear svg{width:13px;height:13px;stroke-width:2.4}

/* ── teacher + misc ── */
.teacher{border-radius:var(--r-sm);padding:18px;margin:18px 0 14px;background:linear-gradient(135deg,#F1EBF8,#FBE9EF)}
.teacher-kicker{display:block;font-size:9px;font-weight:700;letter-spacing:1.3px;color:#6E4BA3;margin-bottom:9px}
.teacher blockquote{font-family:var(--serif);font-size:19px;line-height:1.45;margin:0 0 9px;font-weight:500}
.teacher p{font-size:12.5px;color:var(--ink-2);line-height:1.75;margin-bottom:10px}
.teacher a{font-size:11px;font-weight:600;color:#6E4BA3;border-bottom:1.5px solid #6E4BA366;padding-bottom:2px}
.care-note{font-size:11px;line-height:1.65;color:var(--ink-3);margin-top:22px}
.wide-link{display:block;text-align:center;margin-top:12px;padding:14px;border-radius:var(--r-sm);
  background:var(--card);border:1.5px solid var(--hair);font-size:12.5px;font-weight:600}
.wide-link:active{transform:scale(.98)}

/* ── study cards ── */
.study{position:relative;border-radius:var(--r-sm);padding:20px;margin-bottom:12px;overflow:hidden;
  background:var(--soft)}
.study-mark{position:absolute;right:14px;top:6px;font-size:58px;line-height:1;color:var(--a1);opacity:.22}
.study h3{font-family:var(--serif);font-size:21px;font-weight:600;line-height:1.25;margin:0 0 9px;
  color:var(--deep);max-width:88%;position:relative}
.study p{font-size:13.5px;color:var(--ink-2);margin-bottom:11px}
.study a{font-size:11px;font-weight:600;color:var(--a2);border-bottom:1.5px solid var(--a2);padding-bottom:2px}
details{margin-top:18px;background:var(--card);border:1.5px solid var(--hair);border-radius:var(--r-sm);padding:16px 18px}
summary{cursor:pointer;font-size:13px;font-weight:600;list-style:none}
summary::-webkit-details-marker{display:none}
summary::after{content:'＋';float:right;color:var(--ink-3)}
details[open] summary::after{content:'−'}
details p{font-size:13px;color:var(--ink-2);margin:12px 0}
details a{font-size:11.5px;font-weight:600;text-decoration:underline}

/* ── about ── */
.art{position:relative;border-radius:var(--r);overflow:hidden;height:210px;margin:4px 0 18px}
/* scrim so the caption stays legible over the lighter bands of the artwork */
.art::after{content:'';position:absolute;inset:40% 0 0;background:linear-gradient(transparent,#00000059);pointer-events:none}
.art svg{position:absolute;inset:0}
.art-line{position:absolute;left:18px;bottom:16px;z-index:1;display:flex;align-items:center;gap:12px;color:#fff;
  font-family:var(--serif);font-size:17px;line-height:1.3;text-shadow:0 2px 10px #00000040}
.art-line>span:first-child{font-size:30px;opacity:.8}
.steps{display:grid;gap:10px;margin:20px 0}
.steps>div{border-radius:var(--r-sm);padding:14px 16px;background:var(--soft);border-left:4px solid var(--a1)}
.steps span{font-size:10px;font-weight:700;letter-spacing:1.2px;color:var(--a2)}
.steps strong{display:block;font-family:var(--serif);font-size:19px;font-weight:600;margin:2px 0 3px;color:var(--deep)}
.steps small{font-size:12.5px;color:var(--ink-2)}
.sponsor{margin-top:22px;padding-top:16px;border-top:1px solid var(--hair);font-size:11px;color:var(--ink-3)}
.sponsor strong{display:block;font-size:15px;color:var(--ink);font-weight:600;margin-top:2px}

/* ═══════════ tab bar ═══════════ */
.tabbar{flex:0 0 auto;height:var(--tabbar);padding-bottom:env(safe-area-inset-bottom);
  display:grid;grid-template-columns:repeat(4,1fr);align-items:stretch;
  background:#FBF7F2F2;backdrop-filter:blur(16px);border-top:1px solid var(--hair);
  position:relative;z-index:3;user-select:none}
.tabbar button{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  font-size:10px;font-weight:600;color:var(--ink-3);transition:color .2s}
.tabbar button svg{width:23px;height:23px;transition:transform .2s}
.tabbar button.on{color:#DD6C2C}
.tabbar button.on svg{transform:translateY(-1px)}
.tabbar button:active svg{transform:scale(.88)}

/* ═══════════ player ═══════════ */
.player{position:fixed;inset:0;z-index:40;display:flex;flex-direction:column;align-items:center;
  justify-content:center;gap:16px;padding:calc(20px + env(safe-area-inset-top)) 22px calc(22px + env(safe-area-inset-bottom));
  color:#fff;text-align:center;animation:sheet .4s cubic-bezier(.2,.75,.3,1);overflow:hidden}
.player[hidden]{display:none}
@keyframes sheet{from{opacity:0;transform:translateY(26px)}}
.player-bg{position:absolute;inset:0;z-index:-1;background:linear-gradient(160deg,var(--a1),var(--a2) 55%,var(--deep))}
.player-bg::after{content:'';position:absolute;inset:0;background:radial-gradient(70% 45% at 50% 28%,#ffffff26,transparent 70%)}
.player-close{position:absolute;top:calc(14px + env(safe-area-inset-top));right:16px;width:42px;height:42px;
  border-radius:50%;background:#FFFFFF24;display:grid;place-items:center;color:#fff}
.player-close svg{width:17px;height:17px;stroke-width:2.2}
.player-close:active{transform:scale(.9)}
.player-label{font-size:10.5px;font-weight:700;letter-spacing:2.2px;opacity:.85}

.dial{position:relative;width:min(290px,72vw);aspect-ratio:1;display:grid;place-items:center}
.dial-ring{position:absolute;inset:0;transform:rotate(-90deg)}
.dial-track{fill:none;stroke:#FFFFFF2E;stroke-width:5}
.dial-prog{fill:none;stroke:#fff;stroke-width:5;stroke-linecap:round;
  stroke-dasharray:628.3;stroke-dashoffset:0;transition:stroke-dashoffset .3s linear}
.orb{position:absolute;width:62%;aspect-ratio:1;border-radius:50%;background:#FFFFFF1F;
  box-shadow:inset 0 0 50px #FFFFFF26}
.player.running .orb{animation:orb 10s ease-in-out infinite}
@keyframes orb{0%,100%{transform:scale(.84);opacity:.5}40%{transform:scale(1.06);opacity:.95}}
.dial-text{position:relative;z-index:1}
.dial-text p{font-family:var(--serif);font-size:clamp(46px,15vw,62px);font-weight:600;line-height:1;
  font-variant-numeric:tabular-nums;letter-spacing:-1px}
.dial-text span{display:block;margin-top:8px;font-size:10.5px;font-weight:700;letter-spacing:2.4px;
  text-transform:uppercase;opacity:.9;min-height:15px}

.player-prompt{font-family:var(--serif);font-size:clamp(18px,5vw,22px);line-height:1.45;max-width:22em;
  min-height:3.2em;display:flex;align-items:center;justify-content:center}
.player-actions{display:flex;align-items:center;gap:12px;width:100%;max-width:400px;justify-content:center}
.big-btn{flex:1;max-width:210px;height:56px;border-radius:999px;background:#fff;color:var(--deep);
  font-size:15px;font-weight:700;transition:transform .15s}
.big-btn:active{transform:scale(.96)}
.ghost-btn{width:62px;height:56px;border-radius:18px;background:#FFFFFF1F;display:flex;flex-direction:column;
  align-items:center;justify-content:center;gap:3px;font-size:9.5px;font-weight:600;color:#fff;transition:background .2s}
.ghost-btn svg{width:18px;height:18px}
.ghost-btn[aria-pressed=false]{opacity:.45}
.ghost-btn:active{transform:scale(.93)}
.player-hint{font-size:10.5px;opacity:.72;max-width:30em}

/* ═══════════ desktop ═══════════ */
@media(min-width:900px){
  .app{flex-direction:row;height:100dvh}
  .appbar{position:fixed;top:0;left:0;right:0;max-width:none;justify-content:center;gap:0;
    padding:14px 24px;border-bottom:1px solid var(--hair);background:#FBF7F2F2}
  .appbar .brand{position:absolute;left:24px}
  .appbar-actions{position:absolute;right:24px}
  .tabbar{order:-1;height:auto;width:216px;flex:0 0 216px;grid-template-columns:1fr;align-content:start;
    gap:4px;padding:84px 14px 20px;border-top:0;border-right:1px solid var(--hair);background:transparent}
  .tabbar button{flex-direction:row;justify-content:flex-start;gap:12px;height:46px;padding:0 14px;
    border-radius:12px;font-size:13.5px}
  .tabbar button svg{width:20px;height:20px}
  .tabbar button.on{background:#DD6C2C14}
  .screens{margin-top:68px}
  .screen-inner{padding:26px 36px 50px;max-width:820px}
  .tiles{grid-template-columns:repeat(3,1fr)}
  .verse-list-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}
  .verse-card{margin-bottom:0}
  .steps{grid-template-columns:repeat(3,1fr)}
  .art{height:270px}
  .hero-card{padding:26px}
  .hero-card strong{font-size:26px}
  .screen-title{font-size:42px}
}
@media(prefers-reduced-motion:reduce){
  .screen-inner,.player{animation:none}
  .player.running .orb{animation:none}
  *{transition:none!important}
}