/* Singer — tema escuro. As cores batem com PALETTE em lib/viz.js:
   se mudar uma, mude a outra, senão canvas e HTML divergem. */

:root {
  --bg: #0e1116;
  --panel: #151a21;
  --panel-2: #1a212a;
  --line: #232b36;
  --text: #e6ebf2;
  --dim: #8b97a6;
  --accent: #4ad9c4;
  --accent-2: #5b8fd6;
  --good: #22d3a7;
  --ok: #7bd67b;
  --warn: #e8c34a;
  --bad: #e35d5d;
  --radius: 12px;
  --safe-b: env(safe-area-inset-bottom, 0px);

  /* Profundidade. Luz vem de CIMA e so de cima: sombra embaixo, brilho na
     borda superior. Misturar direcoes de luz e o que faz interface 3D parecer
     suja em vez de solida. */
  --lift-1: 0 1px 2px rgba(0,0,0,.40), 0 2px 6px rgba(0,0,0,.28);
  --lift-2: 0 2px 4px rgba(0,0,0,.45), 0 8px 20px rgba(0,0,0,.38);
  --lift-3: 0 4px 8px rgba(0,0,0,.50), 0 16px 38px rgba(0,0,0,.45);
  --edge-top: inset 0 1px 0 rgba(255,255,255,.10);
  --edge-bottom: inset 0 -1px 0 rgba(0,0,0,.45);
  --ease-press: cubic-bezier(.2,.7,.3,1);
}

* { box-sizing: border-box; }

/* O atributo hidden vale display:none na folha do navegador, mas qualquer
   regra nossa de display (flex, grid) tem prioridade maior e o anula.
   Sem isto, #tabs e #ex-warn aparecem mesmo marcados como hidden. */
[hidden] { display: none !important; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  overscroll-behavior: none;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100dvh;
}

/* ------------------------------------------------------------- topo */

#topbar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  padding-top: calc(12px + env(safe-area-inset-top, 0px));
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 10;
}

#topbar h1 { font-size: 17px; margin: 0; font-weight: 600; flex: 1; }
#hud { font-size: 12px; color: var(--dim); display: flex; gap: 12px; white-space: nowrap; }
#hud b { color: var(--accent); font-variant-numeric: tabular-nums; }

/* A cena inteira ganha perspectiva. Valor alto de proposito: perto demais
   distorce o texto e cansa a leitura. */
#app {
  flex: 1;
  perspective: 1400px;
  perspective-origin: 50% 30%;
}

/* ------------------------------------------------------------- abas */

#tabs {
  display: flex;
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, #161c24, #0c1015);
  position: sticky;
  bottom: 0;
  padding-bottom: var(--safe-b);
  box-shadow: 0 -6px 18px rgba(0,0,0,.5), inset 0 1px 0 rgba(255,255,255,.06);
}

.tab {
  flex: 1;
  padding: 14px 6px;
  background: none;
  border: 0;
  color: var(--dim);
  font: inherit;
  font-size: 13px;
  cursor: pointer;
}
.tab { transition: transform .1s var(--ease-press); }
.tab:active { transform: translateY(2px); }
.tab[aria-current="true"] {
  color: var(--accent);
  box-shadow: inset 0 2px 0 var(--accent), inset 0 22px 26px -22px rgba(74,217,196,.35);
  text-shadow: 0 0 14px rgba(74,217,196,.5);
}

/* ---------------------------------------------------------- estrutura */

.pad { padding: 18px 16px 28px; max-width: 720px; margin: 0 auto; }
.pad.tight { padding: 12px 16px; }
h2 { font-size: 20px; margin: 0 0 10px; line-height: 1.3; }
h3 { font-size: 14px; margin: 24px 0 10px; color: var(--dim); text-transform: uppercase; letter-spacing: .06em; }
.lead { color: var(--dim); margin: 0 0 16px; }
.fine { color: var(--dim); font-size: 12px; margin: 10px 0 0; }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin-top: 14px; }

.steps { color: var(--dim); padding-left: 20px; margin: 0 0 16px; }
.steps li { margin-bottom: 10px; }
.steps b { color: var(--text); }

/* ---------------------------------------------------------- botões */

button { font: inherit; cursor: pointer; border-radius: 10px; }

.primary {
  background: linear-gradient(180deg, #63e8d5 0%, var(--accent) 45%, #2fb8a4 100%);
  color: #04211c;
  border: 0;
  padding: 12px 20px;
  font-weight: 600;
  /* A borda inferior escura E a "altura" do botao: some ao apertar. */
  box-shadow: 0 4px 0 #1d8878, var(--lift-1), inset 0 1px 0 rgba(255,255,255,.35);
  transform: translateZ(0);
  transition: transform .10s var(--ease-press), box-shadow .10s var(--ease-press);
}
.primary:active:not(:disabled) {
  transform: translateY(4px);
  box-shadow: 0 0 0 #1d8878, inset 0 1px 0 rgba(255,255,255,.20);
}
.primary:disabled { opacity: .4; cursor: default; box-shadow: 0 2px 0 #1d8878; }
.primary.big { width: 100%; padding: 16px; font-size: 16px; }

.ghost {
  background: linear-gradient(180deg, #1b222b, #141a21);
  color: var(--text);
  border: 1px solid var(--line);
  padding: 12px 18px;
  box-shadow: var(--lift-1), var(--edge-top);
  transition: transform .10s var(--ease-press), box-shadow .10s var(--ease-press);
}
.ghost:active { transform: translateY(2px); box-shadow: none; }
.ghost.danger { color: var(--bad); border-color: #3a2226; }

.icon { background: none; border: 0; color: var(--text); font-size: 20px; padding: 0 4px; }

.check { color: var(--dim); font-size: 13px; display: flex; align-items: center; gap: 6px; }

/* ---------------------------------------------------------- cartões */

.card {
  background: linear-gradient(180deg, #1a212a 0%, var(--panel) 55%, #12171e 100%);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 16px;
  margin-bottom: 14px;
  box-shadow: var(--lift-2), var(--edge-top), var(--edge-bottom);
}
.card.accent {
  border-color: #2b4a44;
  background: linear-gradient(180deg, #1b2b28 0%, #16211f 55%, #101a18 100%);
  box-shadow: var(--lift-2), var(--edge-top), var(--edge-bottom),
              0 0 0 1px rgba(74,217,196,.06);
}

.callout {
  background: #16202a;
  border-left: 3px solid var(--accent-2);
  border-radius: 6px;
  padding: 12px 14px;
  margin: 16px 0;
  font-size: 14px;
  color: var(--dim);
}
.callout b { color: var(--text); }
.callout.warn { border-left-color: var(--warn); }

/* ---------------------------------------------------------- canvas */

.chart {
  width: 100%; display: block; background: var(--panel);
  /* Canvas parece embutido no painel, nao adesivado por cima. */
  box-shadow: inset 0 2px 10px rgba(0,0,0,.55), inset 0 -1px 0 rgba(255,255,255,.05);
}
.chart-roll { height: 260px; }
.chart-meter { height: 116px; background: var(--bg); }
.chart-sm { height: 110px; border-radius: var(--radius); }
.chart-xs { height: 62px; background: var(--bg); }
.chart-perf { height: 180px; border-radius: var(--radius); }

.practice .chart-roll { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }

.bigreadout { text-align: center; font-size: 38px; font-weight: 600; font-variant-numeric: tabular-nums; margin: 8px 0; }

.status { min-height: 24px; color: var(--dim); font-size: 14px; }
.status.counting { color: var(--accent); font-size: 26px; font-weight: 600; text-align: center; }
.coach { color: var(--dim); font-size: 13px; font-style: italic; margin-top: 12px; }

/* ---------------------------------------------------------- níveis */

.levels { display: grid; gap: 10px; }

.lvl {
  display: grid;
  grid-template-columns: 40px 1fr auto;
  gap: 12px;
  align-items: center;
  background: linear-gradient(180deg, #1c242e 0%, var(--panel) 60%, #11161d 100%);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 13px 14px;
  text-align: left;
  color: var(--text);
  width: 100%;
  /* Tecla de piano: inclinada para tras, afunda ao tocar. */
  transform-style: preserve-3d;
  transform: rotateX(3deg);
  box-shadow: 0 5px 0 #0c1014, var(--lift-2), var(--edge-top);
  transition: transform .12s var(--ease-press), box-shadow .12s var(--ease-press);
}
.lvl:active:not(:disabled) {
  transform: rotateX(0deg) translateY(5px);
  box-shadow: 0 0 0 #0c1014, var(--lift-1), var(--edge-top);
}
.lvl:disabled {
  opacity: .42;
  cursor: not-allowed;
  transform: none;
  box-shadow: inset 0 2px 6px rgba(0,0,0,.55);   /* afundado, nao elevado */
  background: #12171e;
}
.lvl .n {
  width: 34px; height: 34px; border-radius: 50%;
  display: grid; place-items: center;
  background: radial-gradient(circle at 34% 28%, #2b3542, #161c24 70%);
  color: var(--dim);
  font-weight: 600; font-size: 14px;
  box-shadow: 0 2px 4px rgba(0,0,0,.5), inset 0 1px 0 rgba(255,255,255,.13);
}
.lvl.done .n {
  background: radial-gradient(circle at 34% 28%, #6ff2d0, var(--good) 65%, #14a385 100%);
  color: #04211c;
  box-shadow: 0 2px 6px rgba(34,211,167,.35), inset 0 1px 0 rgba(255,255,255,.45);
}
.lvl .t { font-weight: 600; font-size: 15px; }
.lvl .s { color: var(--dim); font-size: 12px; }
.lvl .m { color: var(--dim); font-size: 12px; font-variant-numeric: tabular-nums; white-space: nowrap; }

/* ---------------------------------------------------------- listas */

.list { display: grid; gap: 8px; }

.item {
  display: flex;
  align-items: center;
  gap: 12px;
  background: linear-gradient(180deg, #1a212a, var(--panel) 60%, #12171e);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px 14px;
  text-align: left;
  color: var(--text);
  width: 100%;
  box-shadow: var(--lift-1), var(--edge-top);
  transition: transform .12s var(--ease-press), box-shadow .12s var(--ease-press);
}
button.item:active { transform: translateY(2px); box-shadow: none; }
.item .grow { flex: 1; min-width: 0; }
.item .t { font-weight: 600; font-size: 14px; }
.item .s { color: var(--dim); font-size: 12px; }
.item .badge {
  font-size: 11px; padding: 3px 9px; border-radius: 20px;
  background: linear-gradient(180deg, #222b36, #161d25);
  color: var(--dim); white-space: nowrap;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.08), 0 1px 2px rgba(0,0,0,.4);
}
.item .badge.pass { background: #10322a; color: var(--good); }
.item .badge.fail { background: #33222a; color: var(--bad); }

.theory { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 12px 14px; }
.theory summary { cursor: pointer; font-weight: 600; font-size: 14px; }
.theory p { color: var(--dim); font-size: 14px; margin: 12px 0 0; }

/* --------------------------------------------------------- resultado */

.scorebox { text-align: center; padding: 20px 0 10px; }
.grade {
  font-size: 72px;
  font-weight: 700;
  line-height: 1;
  /* Extrusao por camadas de sombra: a letra vira um bloco solido. */
  text-shadow:
    0 1px 0 rgba(0,0,0,.35), 0 2px 0 rgba(0,0,0,.32), 0 3px 0 rgba(0,0,0,.29),
    0 4px 0 rgba(0,0,0,.26), 0 5px 0 rgba(0,0,0,.22), 0 6px 0 rgba(0,0,0,.18),
    0 10px 26px rgba(0,0,0,.65);
}
.total { font-size: 17px; color: var(--dim); font-variant-numeric: tabular-nums; margin-top: 6px; }
.verdict { font-size: 14px; color: var(--dim); margin-top: 4px; }

.bars { display: grid; gap: 8px; margin: 16px 0; }
.bar { display: grid; grid-template-columns: 92px 1fr 44px; gap: 10px; align-items: center; font-size: 13px; }
.bar .track {
  height: 10px; border-radius: 5px; overflow: hidden;
  background: #10151b;
  box-shadow: inset 0 2px 4px rgba(0,0,0,.7), inset 0 -1px 0 rgba(255,255,255,.05);
}
.bar .fill {
  height: 100%; border-radius: 5px;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.4), inset 0 -3px 6px rgba(0,0,0,.3);
}
.bar .v { text-align: right; color: var(--dim); font-variant-numeric: tabular-nums; }
.bar .k { color: var(--dim); }

.feedback { padding-left: 20px; color: var(--text); }
.feedback li { margin-bottom: 10px; }

.notes { display: grid; gap: 4px; margin-top: 10px; font-size: 13px; }
.nrow { display: grid; grid-template-columns: 1fr 62px 74px; gap: 8px; padding: 6px 0; border-bottom: 1px solid var(--line); font-variant-numeric: tabular-nums; }
.nrow .v { text-align: right; color: var(--dim); }

details summary { cursor: pointer; color: var(--dim); font-size: 14px; margin: 14px 0; }

.kv { display: flex; justify-content: space-between; padding: 5px 0; font-size: 13px; }
.kv span:first-child { color: var(--dim); }
.kv span:last-child { font-variant-numeric: tabular-nums; }

input[type="file"] { color: var(--dim); font-size: 13px; margin-top: 8px; width: 100%; }

/* ------------------------------------------------- formularios in-page */

.field { display: flex; flex-direction: column; gap: 4px; color: var(--dim); font-size: 12px; flex: 1; min-width: 120px; }
.field input {
  font: inherit; font-size: 16px;   /* 16px evita zoom automatico do iOS ao focar */
  color: var(--text);
  background: #0f141a;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 12px;
  box-shadow: inset 0 2px 5px rgba(0,0,0,.55);
}
.field input:focus { outline: none; border-color: var(--accent); box-shadow: inset 0 2px 5px rgba(0,0,0,.55), 0 0 0 3px rgba(74,217,196,.18); }
.err { color: var(--bad); }

/* ----------------------------------------------------- aquecimento */

.warm .t { font-weight: 600; font-size: 15px; }
.warm .done { color: var(--good); }
.warm .steps-mini { display: flex; gap: 6px; margin: 10px 0 4px; }
.warm .steps-mini span {
  flex: 1; height: 6px; border-radius: 3px;
  background: linear-gradient(180deg, #2b3542, #161c24);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.08);
}
.warm.done-today .steps-mini span { background: linear-gradient(180deg, #6ff2d0, #1d9d88); }

@media (min-width: 720px) {
  .chart-roll { height: 320px; }
}

/* ------------------------------------------------- revisao da gravacao */

.playback { gap: 12px; }
.playback input[type="range"] { flex: 1; min-width: 120px; accent-color: var(--accent); }
.mono { font-variant-numeric: tabular-nums; color: var(--dim); font-size: 13px; min-width: 48px; text-align: right; }

/* ----------------------------------------------- download do APK */

.apk3d { position: relative; overflow: hidden; }
.apk3d::after {
  /* Brilho diagonal: da a leitura de superficie inclinada sob luz. */
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(115deg, rgba(255,255,255,.055) 0%, transparent 42%);
  pointer-events: none;
}
.apk-row { display: flex; align-items: center; gap: 14px; }
.apk-ico {
  width: 52px; height: 52px; flex: none;
  display: grid; place-items: center;
  border-radius: 14px;
  color: #04211c;
  background: linear-gradient(160deg, #6ff2d0, var(--accent) 50%, #1d9d88 100%);
  box-shadow: 0 5px 0 #14705f, 0 8px 18px rgba(0,0,0,.5),
              inset 0 1px 0 rgba(255,255,255,.5);
  transform: rotateX(10deg) rotateZ(-4deg);
}
.apk3d .t { font-weight: 600; font-size: 15px; }
.apk3d .s { color: var(--dim); font-size: 12px; }
.btn3d { position: relative; z-index: 1; }