:root {
  --bg: #0d1117;
  --bg2: #131a24;
  --card: #18212e;
  --card2: #1d2838;
  --border: #2a3a50;
  --text: #e6edf3;
  --muted: #93a4b8;
  --accent: #4cc9b0;
  --accent2: #7c6ff0;
  --danger: #e5686b;
  --warn: #e8b44c;
  --ok: #5dd39e;
  --shadow: 0 6px 24px rgba(0,0,0,.35);
  --radius: 14px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "Segoe UI", system-ui, -apple-system, Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}
#app { display: flex; min-height: 100vh; }

/* ---------- Sidebar ---------- */
#sidebar {
  width: 280px; flex-shrink: 0;
  background: var(--bg2);
  border-right: 1px solid var(--border);
  padding: 20px 16px;
  display: flex; flex-direction: column; gap: 18px;
  position: sticky; top: 0; height: 100vh; overflow-y: auto;
}
.brand { display: flex; gap: 12px; align-items: center; }
.brand-logo { font-size: 34px; }
.brand-name { font-size: 22px; font-weight: 700; letter-spacing: .5px; }
.brand-sub { font-size: 11.5px; color: var(--muted); }
.progress-wrap { background: var(--card); padding: 10px 12px; border-radius: 10px; border: 1px solid var(--border); }
.progress-label { display: flex; justify-content: space-between; font-size: 12px; color: var(--muted); margin-bottom: 6px; }
.progress-bar { height: 8px; background: #0a0e14; border-radius: 6px; overflow: hidden; }
#progress-fill { height: 100%; width: 0%; background: linear-gradient(90deg, var(--accent), var(--accent2)); transition: width .4s; }
#nav { display: flex; flex-direction: column; gap: 4px; }
#nav a {
  display: flex; align-items: center; gap: 10px;
  color: var(--text); text-decoration: none;
  padding: 9px 12px; border-radius: 10px; font-size: 14.5px;
  transition: background .15s;
}
#nav a:hover { background: var(--card); }
#nav a.active { background: linear-gradient(90deg, rgba(76,201,176,.18), rgba(124,111,240,.14)); border: 1px solid var(--border); font-weight: 600; }
.sidebar-foot { margin-top: auto; }

/* ---------- Main ---------- */
#main { flex: 1; padding: 28px 34px 80px; max-width: 1250px; margin: 0 auto; width: 100%; min-width: 0; }
.view.hidden { display: none; }
.view-head { margin-bottom: 22px; }
.view-head h2 { font-size: 26px; margin-bottom: 6px; }
.view-head p { color: var(--muted); max-width: 900px; }
.view-head a { color: var(--accent); }

.hero {
  background: linear-gradient(135deg, rgba(76,201,176,.12), rgba(124,111,240,.14));
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 34px 32px; margin-bottom: 28px;
}
.hero h1 { font-size: 30px; line-height: 1.25; margin-bottom: 10px; }
.hero p { color: var(--muted); max-width: 860px; }
.grad { background: linear-gradient(90deg, var(--accent), var(--accent2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero-actions { display: flex; gap: 12px; margin-top: 18px; flex-wrap: wrap; }

/* ---------- Cards / buttons ---------- */
.card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 18px 20px; box-shadow: var(--shadow);
}
.card h3 { font-size: 16.5px; margin-bottom: 10px; color: var(--accent); }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--card2); color: var(--text);
  border: 1px solid var(--border); border-radius: 10px;
  padding: 9px 16px; font-size: 14px; cursor: pointer;
  text-decoration: none; transition: filter .15s, transform .05s;
  font-family: inherit;
}
.btn:hover { filter: brightness(1.18); }
.btn:active { transform: scale(.98); }
.btn-primary { background: linear-gradient(90deg, #2ea88f, #5566d6); border-color: transparent; font-weight: 600; }
.btn-danger { background: rgba(229,104,107,.15); border-color: rgba(229,104,107,.4); }
.btn-sm { padding: 6px 11px; font-size: 13px; }
.btn-ghost { background: transparent; border: 1px dashed var(--border); color: var(--muted); width: 100%; padding: 8px; border-radius: 10px; cursor: pointer; }
.btn-ghost2 { background: transparent; }
.btn:disabled { opacity: .45; cursor: not-allowed; }

/* ---------- Roadmap ---------- */
.fase { margin-bottom: 26px; }
.fase-head { display: flex; align-items: center; gap: 14px; margin-bottom: 12px; flex-wrap: wrap; }
.fase-num {
  width: 46px; height: 46px; border-radius: 12px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; font-weight: 800;
  background: linear-gradient(135deg, rgba(76,201,176,.25), rgba(124,111,240,.25));
  border: 1px solid var(--border);
}
.fase-title h3 { font-size: 18px; }
.fase-title p { font-size: 13px; color: var(--muted); }
.fase-badge { font-size: 11.5px; background: var(--card2); border: 1px solid var(--border); color: var(--accent); padding: 3px 10px; border-radius: 999px; margin-left: auto; }
.lessons { display: grid; grid-template-columns: repeat(auto-fill, minmax(290px, 1fr)); gap: 12px; }
.lesson-card {
  background: var(--card); border: 1px solid var(--border); border-radius: 12px;
  padding: 14px 16px; display: block; color: var(--text); text-decoration: none;
  transition: border-color .15s, transform .1s; position: relative;
}
.lesson-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.lesson-card .lc-num { font-size: 11.5px; color: var(--accent2); font-weight: 700; letter-spacing: .4px; }
.lesson-card .lc-title { font-size: 15px; font-weight: 600; margin: 3px 0 6px; }
.lesson-card .lc-desc { font-size: 12.5px; color: var(--muted); }
.lesson-card.done { border-color: var(--ok); }
.lesson-card.done .lc-title::after { content: " ✓"; color: var(--ok); }

/* ---------- Lesson content ---------- */
#view-licao { max-width: 900px; }
.breadcrumb { font-size: 13px; color: var(--muted); margin-bottom: 14px; }
.breadcrumb a { color: var(--accent); text-decoration: none; }
.lesson-header { margin-bottom: 20px; }
.lesson-header h2 { font-size: 27px; }
.lesson-meta { display: flex; gap: 8px; margin-top: 8px; flex-wrap: wrap; }
.tag { font-size: 11.5px; padding: 3px 10px; border-radius: 999px; background: var(--card2); border: 1px solid var(--border); color: var(--muted); }
.lesson-body { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 26px 30px; }
.lesson-body h4 { color: var(--accent); font-size: 17px; margin: 22px 0 8px; }
.lesson-body h4:first-child { margin-top: 0; }
.lesson-body p { margin-bottom: 10px; }
.lesson-body ul, .lesson-body ol { margin: 0 0 12px 22px; }
.lesson-body li { margin-bottom: 5px; }
.lesson-body code { background: #0a0e14; padding: 2px 7px; border-radius: 6px; font-size: 13px; color: var(--warn); }
.lesson-body table { border-collapse: collapse; width: 100%; margin: 10px 0 16px; font-size: 14px; }
.lesson-body th, .lesson-body td { border: 1px solid var(--border); padding: 7px 10px; text-align: left; }
.lesson-body th { background: var(--card2); color: var(--accent); }
.formula-box {
  background: #0e1520; border: 1px solid var(--border); border-left: 4px solid var(--accent2);
  padding: 12px 16px; border-radius: 8px; margin: 12px 0; font-size: 15.5px; overflow-x: auto;
}
.pharma-box {
  background: rgba(76,201,176,.08); border: 1px solid rgba(76,201,176,.35);
  padding: 12px 16px; border-radius: 8px; margin: 12px 0; font-size: 14.5px;
}
.pharma-box b { color: var(--accent); }
.warn-box { background: rgba(232,180,76,.08); border: 1px solid rgba(232,180,76,.35); padding: 12px 16px; border-radius: 8px; margin: 12px 0; font-size: 14.5px; }
.lesson-actions { display: flex; gap: 10px; margin-top: 20px; flex-wrap: wrap; align-items: center; }
.done-toggle { border-color: var(--ok); color: var(--ok); }
.done-toggle.on { background: rgba(93,211,158,.18); }

/* ---------- Forms ---------- */
.form-row { margin-bottom: 12px; }
.form-row label { display: block; font-size: 12.5px; color: var(--muted); margin-bottom: 4px; }
.form-row-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 12px; }
input[type="text"], input[type="number"], input[type="password"], select, textarea {
  width: 100%; background: #0a0e14; color: var(--text);
  border: 1px solid var(--border); border-radius: 8px; padding: 8px 10px;
  font-size: 14px; font-family: inherit;
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent2); border-color: transparent; }
input[type="range"] { width: 100%; accent-color: var(--accent); }

/* ---------- Titulação ---------- */
.tit-grid { display: grid; grid-template-columns: 340px 1fr 300px; gap: 16px; align-items: start; }
.tit-grid .tit-species { grid-column: 1 / -1; }
.tit-buttons { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 10px; }
.readout { background: #0a0e14; border: 1px solid var(--border); border-radius: 10px; padding: 12px; font-size: 14px; }
.readout .big { font-size: 30px; font-weight: 800; color: var(--accent); }
.readout table { width: 100%; font-size: 13px; border-collapse: collapse; }
.readout td { padding: 3px 4px; border-bottom: 1px dashed var(--border); }
.readout td:last-child { text-align: right; font-family: Consolas, monospace; }
canvas { width: 100%; display: block; }
.note { background: rgba(124,111,240,.08); border: 1px solid rgba(124,111,240,.3); border-radius: 8px; padding: 9px 12px; font-size: 13px; margin-top: 10px; }
.region-badge { display: inline-block; padding: 3px 12px; border-radius: 999px; font-size: 12.5px; font-weight: 700; margin-bottom: 8px; }
.species-stack { display: flex; height: 34px; border-radius: 8px; overflow: hidden; border: 1px solid var(--border); }
.species-stack div { display: flex; align-items: center; justify-content: center; font-size: 11.5px; font-weight: 700; color: #0b0f14; transition: width .25s; min-width: 0; overflow: hidden; white-space: nowrap; }
.species-legend { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 8px; font-size: 12.5px; color: var(--muted); }
.species-legend span::before { content: "■ "; }
#tit-explain { font-size: 14px; }
#tit-explain .step { padding: 8px 12px; border-left: 3px solid var(--accent2); background: #0e1520; border-radius: 6px; margin-bottom: 8px; opacity: 0; transform: translateX(-8px); transition: opacity .4s, transform .4s; }
#tit-explain .step.show { opacity: 1; transform: none; }

/* ---------- Calibração ---------- */
.cal-grid { display: grid; grid-template-columns: 380px 1fr; gap: 16px; align-items: start; }
.cal-grid .card:last-child { grid-column: 1 / -1; }
.hint { font-size: 12.5px; color: var(--muted); margin-bottom: 8px; }
.res-table { width: 100%; border-collapse: collapse; font-size: 14.5px; }
.res-table td, .res-table th { border: 1px solid var(--border); padding: 8px 12px; }
.res-table th { background: var(--card2); color: var(--accent); text-align: left; }
.res-table td:last-child { font-family: Consolas, monospace; }

/* ---------- Tabs ---------- */
.tabs { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 18px; }
.tabs button {
  background: var(--card); border: 1px solid var(--border); color: var(--muted);
  padding: 8px 16px; border-radius: 999px; cursor: pointer; font-size: 13.5px; font-family: inherit;
}
.tabs button.active { background: linear-gradient(90deg, rgba(76,201,176,.2), rgba(124,111,240,.2)); color: var(--text); font-weight: 600; border-color: var(--accent); }

/* ---------- Lab ---------- */
.lab-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; align-items: start; }
.lab-grid .card:last-child { grid-column: 1 / -1; }
.obs-list { max-height: 320px; overflow-y: auto; }
.obs-item { background: #0a0e14; border: 1px solid var(--border); border-radius: 8px; padding: 9px 12px; margin-bottom: 8px; font-size: 13.5px; }
.obs-item b { color: var(--accent); }
.obs-item .swatch { display: inline-block; width: 13px; height: 13px; border-radius: 4px; border: 1px solid #555; vertical-align: -2px; margin-right: 5px; }
.guess-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 8px; }
.guess-grid label { display: flex; gap: 8px; align-items: center; background: #0a0e14; border: 1px solid var(--border); border-radius: 8px; padding: 8px 10px; font-size: 13.5px; cursor: pointer; }
.guess-grid label.sel { border-color: var(--accent); background: rgba(76,201,176,.1); }
.ref-table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.ref-table th, .ref-table td { border: 1px solid var(--border); padding: 7px 10px; }
.ref-table th { background: var(--card2); color: var(--accent); }
.feedback-ok { color: var(--ok); font-weight: 700; margin-top: 12px; }
.feedback-no { color: var(--danger); font-weight: 700; margin-top: 12px; }

/* ---------- Quiz ---------- */
.filter-chips { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 16px; }
.filter-chips button {
  background: var(--card); border: 1px solid var(--border); color: var(--muted);
  padding: 6px 14px; border-radius: 999px; cursor: pointer; font-size: 13px; font-family: inherit;
}
.filter-chips button.active { background: linear-gradient(90deg, rgba(76,201,176,.2), rgba(124,111,240,.2)); color: var(--text); font-weight: 600; border-color: var(--accent); }
#quiz-stats { font-size: 13.5px; color: var(--muted); margin-bottom: 14px; }
.q-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px 22px; margin-bottom: 18px; }
.q-head { display: flex; gap: 10px; align-items: center; margin-bottom: 10px; flex-wrap: wrap; }
.q-enunciado { font-size: 15px; margin-bottom: 14px; }
.q-alt { display: block; background: #0a0e14; border: 1px solid var(--border); border-radius: 10px; padding: 10px 14px; margin-bottom: 8px; cursor: pointer; font-size: 14px; transition: border-color .15s; }
.q-alt:hover { border-color: var(--accent2); }
.q-alt.correct { border-color: var(--ok); background: rgba(93,211,158,.12); }
.q-alt.wrong { border-color: var(--danger); background: rgba(229,104,107,.12); }
.q-alt.dim { opacity: .5; }
.q-num-input { display: flex; gap: 10px; align-items: center; margin-bottom: 10px; }
.q-num-input input { max-width: 200px; }
.q-feedback { border-radius: 10px; padding: 12px 16px; margin: 10px 0; font-size: 14px; }
.q-feedback.ok { background: rgba(93,211,158,.1); border: 1px solid var(--ok); }
.q-feedback.no { background: rgba(229,104,107,.1); border: 1px solid var(--danger); }
.q-solution { margin-top: 14px; }
.q-solution h4 { color: var(--accent2); font-size: 14.5px; margin-bottom: 10px; }
.sol-step { background: #0e1520; border-left: 3px solid var(--accent2); border-radius: 8px; padding: 11px 15px; margin-bottom: 8px; font-size: 14px; opacity: 0; transform: translateY(8px); transition: opacity .5s, transform .5s; }
.sol-step.show { opacity: 1; transform: none; }
.sol-final { background: rgba(93,211,158,.1); border: 1px solid var(--ok); border-radius: 8px; padding: 11px 15px; font-weight: 700; margin-top: 10px; opacity: 0; transition: opacity .5s; }
.sol-final.show { opacity: 1; }

/* ---------- Provas ---------- */
.exam-group { margin-bottom: 20px; }
.exam-link { display: block; background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 12px 16px; margin-bottom: 8px; text-decoration: none; color: var(--text); transition: border-color .15s; }
.exam-link:hover { border-color: var(--accent); }
.exam-link b { color: var(--accent); }
.exam-link span { display: block; font-size: 12.5px; color: var(--muted); }

/* ---------- Tutor ---------- */
.tutor-grid { display: grid; grid-template-columns: 1fr 340px; gap: 16px; align-items: start; }
.tutor-chat { display: flex; flex-direction: column; min-height: 480px; }
.chat-log { flex: 1; overflow-y: auto; max-height: 520px; padding-right: 6px; }
.chat-msg { max-width: 88%; border-radius: 12px; padding: 11px 15px; margin-bottom: 10px; font-size: 14px; white-space: pre-wrap; }
.chat-msg.user { background: linear-gradient(90deg, #2b5f8f, #3b4fa0); margin-left: auto; }
.chat-msg.bot { background: var(--card2); border: 1px solid var(--border); }
.chat-msg.bot b { color: var(--accent); }
.chat-input { display: flex; gap: 10px; margin-top: 12px; }
.chat-msg .open-lesson { margin-top: 8px; }

/* ---------- Responsivo ---------- */
@media (max-width: 1100px) {
  .tit-grid, .cal-grid, .lab-grid, .tutor-grid { grid-template-columns: 1fr; }
  .cal-grid .card:last-child, .lab-grid .card:last-child, .tit-grid .tit-species { grid-column: auto; }
}
@media (max-width: 820px) {
  #app { flex-direction: column; }
  #sidebar { width: 100%; height: auto; position: static; }
  #main { padding: 18px; }
}