/* study-app — estilos da camada Duolingo (trilha + lição + celebrações). doc 17
   it9 (reforma UI/UX): seções em accordion, unidades em linhas horizontais
   compactas, contrastes revisados para claro E escuro. */

/* ---------- header de stats (streak / XP / meta) ---------- */
.duo-stats { display: flex; gap: var(--sp-2); align-items: center; flex-wrap: wrap; }
.duo-stat {
  display: flex; align-items: center; gap: 5px;
  font-weight: 800; font-size: var(--text-xs);
  padding: 5px 10px; border-radius: 999px;
  background: var(--surface-2); border: 1px solid var(--line);
}
.duo-stat svg { width: 16px; height: 16px; }
.duo-stat--fire  { color: #ff9600; }
.duo-stat--fire.is-off { color: var(--faint); filter: grayscale(1); }
.duo-stat--xp    { color: #1cb0f6; }
.duo-stat--freeze{ color: #59c5f7; }
.duo-stat--boost { color: #b45309; background: var(--warn-bg); border-color: #ffc800; animation: duo-pulse 1.2s ease-in-out infinite alternate; }
@keyframes duo-pulse { to { box-shadow: 0 0 10px #ffc80066; } }

.duo-goalring { position: relative; width: 44px; height: 44px; flex: none; }
.duo-goalring svg { width: 44px; height: 44px; transform: rotate(-90deg); }
.duo-goalring circle { fill: none; stroke-width: 5; }
.duo-goalring .bg { stroke: var(--line); }
.duo-goalring .fg { stroke: #58cc02; stroke-linecap: round; transition: stroke-dashoffset .6s ease; }
.duo-goalring span {
  position: absolute; inset: 0; display: grid; place-items: center;
  font-size: 10px; font-weight: 900; color: var(--fg);
}

/* ---------- card "Hoje" (stats + missões + baús condensados) ---------- */
.duo-today { padding: var(--sp-3) var(--sp-4); }
.duo-risk {
  display: flex; gap: var(--sp-3); align-items: center;
  padding: var(--sp-3) var(--sp-4); margin-top: var(--sp-3);
  border-left: 4px solid #ff9600;
}
.duo-risk svg { width: 22px; height: 22px; color: #ff9600; flex: none; }
.duo-quest { display: flex; align-items: center; gap: var(--sp-2); padding: var(--sp-2) 0; }
.duo-quest + .duo-quest { border-top: 1px solid var(--line-soft); }
.duo-quest__bar { flex: 1; height: 12px; border-radius: 999px; background: var(--surface-2); border: 1px solid var(--line-soft); overflow: hidden; position: relative; }
.duo-quest__bar i { display: block; height: 100%; background: #ffc800; border-radius: 999px; transition: width .5s ease; }
.duo-quest__bar span {
  position: absolute; inset: 0; display: grid; place-items: center;
  font-size: 9px; font-weight: 800; color: var(--fg);
}
.duo-quest.is-done .duo-quest__bar i { background: #58cc02; }
.duo-chest { display: flex; align-items: center; gap: var(--sp-2); padding: var(--sp-1) 0; font-size: var(--text-2xs); font-weight: 700; }
.duo-chest.is-off { color: var(--faint); }
.duo-chest.is-claimed { color: var(--ok); }
.duo-chest span { flex: 1; }
.duo-chest.is-ready { animation: duo-pulse 1s ease-in-out infinite alternate; border-radius: var(--r-md); }

/* ---------- trilha: seções em accordion ---------- */
.duo-section {
  width: 100%; border: 0; cursor: pointer;
  border-radius: var(--r-lg); padding: var(--sp-3) var(--sp-4);
  color: #fff; font-weight: 900; letter-spacing: .2px; text-align: left;
  font-size: var(--text-sm);
  text-shadow: 0 1px 2px rgba(0, 0, 0, .45);
  margin-top: var(--sp-3);
  display: flex; justify-content: space-between; align-items: center; gap: var(--sp-2);
  box-shadow: var(--shadow-sm);
  /* fundo = cor da seção escurecida p/ contraste com o texto branco */
  background: color-mix(in srgb, var(--sec-c, #58cc02) 78%, #000);
}
.duo-section small { display: block; font-weight: 700; opacity: .9; font-size: var(--text-2xs); }
.duo-section .duo-chev { transition: transform .2s ease; flex: none; }
.duo-section[aria-expanded="true"] .duo-chev { transform: rotate(180deg); }

/* ---------- trilha: unidades como linhas horizontais compactas ---------- */
.duo-unit { padding: var(--sp-2) var(--sp-1); border-bottom: 1px solid var(--line-soft); }
.duo-unit:last-child { border-bottom: 0; }
.duo-unit__title {
  color: var(--muted); font-weight: 800; font-size: var(--text-2xs);
  text-transform: uppercase; letter-spacing: .6px; margin-bottom: 6px;
  display: flex; justify-content: space-between; align-items: baseline; gap: var(--sp-2);
}
.duo-unit__title em { font-style: normal; color: var(--faint); font-weight: 700; }
.duo-unit__row { display: flex; flex-wrap: wrap; gap: 12px 14px; align-items: center; }

/* botão = bolha + legenda */
.duo-les {
  background: none; border: 0; padding: 0; cursor: pointer; flex: none;
  display: flex; flex-direction: column; align-items: center; gap: 7px;
  min-width: 56px;
}
.duo-les[disabled] { cursor: default; }
.duo-les:active .duo-node:not(.duo-node--locked) { transform: translateY(3px); box-shadow: 0 2px 0 var(--c-dark); }
.duo-les__cap {
  font-size: 9px; font-weight: 800; color: var(--muted);
  text-transform: uppercase; letter-spacing: .4px;
}
.duo-les__cap.is-active { color: #58a700; }
.duo-les[disabled] .duo-les__cap { color: var(--faint); }

.duo-node {
  --c: #58cc02; --c-dark: #46a302;
  width: 52px; height: 48px; border-radius: 50% / 46%;
  position: relative; flex: none;
  background: var(--c); box-shadow: 0 5px 0 var(--c-dark);
  display: grid; place-items: center; color: #fff;
  transition: transform .08s ease, box-shadow .08s ease;
}
.duo-node b { font-size: 17px; font-weight: 900; }
.duo-node svg { width: 20px; height: 20px; }
.duo-node--done   { --c: #ffc800; --c-dark: #cf9c00; color: #5f4700; }
.duo-node--locked {
  --c: var(--surface-2); --c-dark: var(--line); color: var(--faint);
  box-shadow: 0 5px 0 var(--line); filter: grayscale(1); opacity: .8;
}
.duo-node--active { outline: 3px solid color-mix(in srgb, #58cc02 45%, transparent); outline-offset: 3px; }
.duo-node--legendary { --c: #a855f7; --c-dark: #7e22ce; font-size: 20px; }
.duo-node--legendary-done { --c: #a855f7; --c-dark: #7e22ce; font-size: 20px; box-shadow: 0 5px 0 var(--c-dark), 0 0 14px #ce82ff88; }
.duo-node .duo-stars {
  position: absolute; bottom: -7px; left: 50%; transform: translateX(-50%);
  display: flex; gap: 1px; font-size: 10px; color: #fff;
  text-shadow: 0 1px 2px rgba(0, 0, 0, .55);
}

/* ---------- lição ---------- */
.duo-lesson { max-width: 640px; margin: 0 auto; display: flex; flex-direction: column; min-height: calc(100dvh - 180px); }
.duo-lesson__top { display: flex; align-items: center; gap: var(--sp-3); padding: var(--sp-3) 0; }
.duo-progress { flex: 1; height: 14px; border-radius: 999px; background: var(--surface-2); border: 1px solid var(--line-soft); overflow: hidden; }
.duo-progress i { display: block; height: 100%; width: 0; background: #58cc02; border-radius: 999px; transition: width .35s ease; }
.duo-combo { font-weight: 900; color: #ff9600; font-size: var(--text-sm); min-width: 52px; text-align: right; }
.duo-lesson--legendary .duo-progress i { background: #ce82ff; }
.duo-legendary-tag {
  text-align: center; color: #a855f7; font-weight: 900; letter-spacing: 2px;
  font-size: var(--text-2xs); margin-top: var(--sp-2);
}

.duo-q { font-size: var(--text-base); font-weight: 700; line-height: 1.5; margin: var(--sp-4) 0; }
.duo-opts { display: flex; flex-direction: column; gap: var(--sp-3); }
.duo-opt {
  text-align: left; padding: var(--sp-3) var(--sp-4); border-radius: var(--r-lg);
  background: var(--bg-elev); border: 2px solid var(--line);
  box-shadow: 0 3px 0 var(--line); cursor: pointer;
  font-size: var(--text-sm); line-height: 1.45; color: var(--fg);
  transition: transform .06s ease;
}
.duo-opt:active { transform: translateY(2px); box-shadow: 0 1px 0 var(--line); }
.duo-opt.is-correct { border-color: #58cc02; box-shadow: 0 3px 0 #46a302; background: color-mix(in srgb, #58cc02 12%, var(--bg-elev)); }
.duo-opt.is-wrong   { border-color: #ff4b4b; box-shadow: 0 3px 0 #d33; background: color-mix(in srgb, #ff4b4b 10%, var(--bg-elev)); animation: duo-shake .3s; }
.duo-opt:disabled { cursor: default; opacity: .95; }
@keyframes duo-shake { 25% { transform: translateX(-5px); } 75% { transform: translateX(5px); } }

.duo-feedback {
  position: sticky; bottom: 0; margin-top: auto;
  padding: var(--sp-4); border-radius: var(--r-lg) var(--r-lg) 0 0;
  animation: duo-slideup .25s ease;
}
.duo-feedback--ok  { background: color-mix(in srgb, #58cc02 16%, var(--bg-elev)); border-top: 3px solid #58cc02; }
.duo-feedback--bad { background: color-mix(in srgb, #ff4b4b 14%, var(--bg-elev)); border-top: 3px solid #ff4b4b; }
.duo-feedback h4 { font-weight: 900; margin-bottom: 4px; color: var(--fg); }
.duo-feedback p { font-size: var(--text-xs); color: var(--fg-soft); margin-bottom: var(--sp-3); }
@keyframes duo-slideup { from { transform: translateY(100%); } }

/* ---------- fim de lição ---------- */
.duo-end { text-align: center; padding: var(--sp-8) var(--sp-4); max-width: 480px; margin: 0 auto; }
.duo-end__emoji { font-size: 64px; animation: duo-pop .5s cubic-bezier(.2,1.6,.4,1); }
.duo-end h2 { font-size: var(--text-xl); font-weight: 900; margin: var(--sp-3) 0; color: #b45309; }
.duo-end h2.duo-h2--legendary { color: #7e22ce; }
.duo-end p { color: var(--fg-soft); }
.duo-end__cards { display: flex; gap: var(--sp-3); justify-content: center; margin: var(--sp-5) 0; }
.duo-end__card { border: 2px solid var(--line); border-radius: var(--r-lg); overflow: hidden; min-width: 96px; background: var(--bg-elev); }
.duo-end__card b { display: block; padding: 4px; font-size: 10px; font-weight: 900; color: rgba(0, 0, 0, .68); letter-spacing: 1px; }
.duo-end__card span { display: block; padding: var(--sp-3); font-size: var(--text-lg); font-weight: 900; color: var(--fg); }
@keyframes duo-pop { from { transform: scale(0); } }

/* variantes escuras dos acentos dourados (mais claros sobre fundo escuro) */
[data-theme="dark"] .duo-end h2 { color: #ffc800; }
[data-theme="dark"] .duo-end h2.duo-h2--legendary { color: #ce82ff; }
[data-theme="dark"] .duo-legendary-tag { color: #ce82ff; }
[data-theme="dark"] .duo-stat--boost { color: #ffc800; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .duo-end h2 { color: #ffc800; }
  :root:not([data-theme="light"]) .duo-end h2.duo-h2--legendary { color: #ce82ff; }
  :root:not([data-theme="light"]) .duo-legendary-tag { color: #ce82ff; }
  :root:not([data-theme="light"]) .duo-stat--boost { color: #ffc800; }
}

/* ---------- perfil ---------- */
.duo-profile-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--sp-2); }
.duo-profile-stat { padding: var(--sp-3); text-align: center; display: flex; flex-direction: column; gap: 2px; }
.duo-profile-stat span { font-size: 22px; }
.duo-profile-stat strong { font-size: var(--text-lg); font-weight: 900; }
.duo-profile-stat small { font-size: var(--text-2xs); color: var(--muted); }
.duo-badge { display: flex; gap: var(--sp-3); align-items: center; padding: var(--sp-3) var(--sp-4); }
.duo-badge.is-locked { opacity: .55; filter: grayscale(.6); }
.duo-badge__emoji { font-size: 30px; flex: none; }
.duo-badge__tier { color: #eab308; font-size: 10px; letter-spacing: 2px; }

/* ---------- dobras (materiais/agrupamentos longos) ---------- */
details.duo-fold > summary { list-style: none; cursor: pointer; }
details.duo-fold > summary::-webkit-details-marker { display: none; }
details.duo-fold > summary .duo-chev { transition: transform .2s ease; }
details.duo-fold[open] > summary .duo-chev { transform: rotate(180deg); }

/* ---------- confete ---------- */
.duo-confetti { position: fixed; inset: 0; pointer-events: none; z-index: 9999; overflow: hidden; }
.duo-confetti i {
  position: absolute; top: -12px; width: 8px; height: 14px; border-radius: 2px;
  animation: duo-fall linear forwards;
}
@keyframes duo-fall {
  to { transform: translateY(105vh) rotate(720deg); opacity: .7; }
}