/* Shared stylesheet for the Learn course — every lesson & reference doc links this.
   Goal: one consistent, beautiful, printable course. Tufte-ish: serif text, generous
   margins, restrained palette, quiet rules. */

:root {
  --ink: #1a1a1a;
  --muted: #5b5b5b;
  --paper: #fdfdfb;
  --rule: #e6e3db;
  --accent: #9a3b1b;      /* dark terracotta */
  --accent-soft: #f6ece6;
  --good: #1f6b3b;
  --bad: #9a1b1b;
  --code-bg: #f4f2ec;
  --maxw: 46rem;
}

* { box-sizing: border-box; }

html { font-size: 18px; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Iowan Old Style", "Palatino Linotype", "Georgia", serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 4rem 1.5rem 6rem; }

/* Masthead / breadcrumbs */
.masthead { font-size: .8rem; letter-spacing: .12em; text-transform: uppercase;
  color: var(--muted); margin-bottom: 2.5rem; }
.masthead a { color: var(--muted); text-decoration: none; border-bottom: 1px solid var(--rule); }
.masthead a:hover { color: var(--accent); }

/* Headings */
h1 { font-size: 2.3rem; line-height: 1.15; margin: 0 0 .4rem; letter-spacing: -.01em; }
h2 { font-size: 1.45rem; margin: 2.6rem 0 .6rem; padding-top: 1.4rem; border-top: 1px solid var(--rule); }
h3 { font-size: 1.1rem; margin: 1.8rem 0 .4rem; }
.subtitle { font-size: 1.15rem; color: var(--muted); font-style: italic; margin: 0 0 2rem; }

p, li { font-size: 1.02rem; }
a { color: var(--accent); }
strong { font-weight: 600; }

/* Lead-in label */
.kicker { font-family: ui-monospace, "JetBrains Mono", "SFMono-Regular", monospace;
  font-size: .72rem; letter-spacing: .16em; text-transform: uppercase; color: var(--accent);
  margin: 0 0 .8rem; }

/* Callouts */
.note, .win, .source {
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
  padding: 1rem 1.2rem; margin: 1.6rem 0; border-radius: 0 4px 4px 0;
  font-size: .96rem;
}
.win { border-left-color: var(--good); background: #eef6f0; }
.source { border-left-color: var(--muted); background: #f3f2ee; }
.note .label, .win .label, .source .label {
  display: block; font-family: ui-monospace, monospace; font-size: .68rem;
  letter-spacing: .14em; text-transform: uppercase; color: var(--muted); margin-bottom: .3rem;
}

/* Code & monospace */
code { font-family: ui-monospace, "JetBrains Mono", monospace; font-size: .88em;
  background: var(--code-bg); padding: .12em .35em; border-radius: 3px; }
pre { background: var(--code-bg); padding: 1rem 1.2rem; border-radius: 5px; overflow-x: auto;
  font-size: .85rem; line-height: 1.5; }
pre code { background: none; padding: 0; }

/* Rubric table */
table { border-collapse: collapse; width: 100%; margin: 1.4rem 0; font-size: .95rem; }
th, td { text-align: left; padding: .55rem .7rem; border-bottom: 1px solid var(--rule); vertical-align: top; }
th { font-size: .72rem; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }

/* Quiz widget (skills feedback loop) */
.quiz { border: 1px solid var(--rule); border-radius: 6px; padding: 1.2rem 1.3rem; margin: 1.8rem 0; }
.quiz .q { font-weight: 600; margin: 0 0 .8rem; }
.quiz button {
  display: block; width: 100%; text-align: left; margin: .4rem 0; padding: .6rem .8rem;
  font: inherit; font-size: .95rem; background: #fff; border: 1px solid var(--rule);
  border-radius: 5px; cursor: pointer; transition: border-color .15s, background .15s;
}
.quiz button:hover { border-color: var(--accent); }
.quiz button.correct { border-color: var(--good); background: #eef6f0; }
.quiz button.wrong { border-color: var(--bad); background: #f9eded; }
.quiz .feedback { margin-top: .8rem; font-size: .92rem; min-height: 1.2rem; }
.quiz .feedback.show-good { color: var(--good); }
.quiz .feedback.show-bad { color: var(--bad); }

/* Footer */
footer { margin-top: 4rem; padding-top: 1.4rem; border-top: 1px solid var(--rule);
  font-size: .85rem; color: var(--muted); }

/* Lesson index cards (used by site/index.html) */
.lessons { list-style: none; padding: 0; margin: 2rem 0; }
.lessons li { padding: 1rem 0; border-bottom: 1px solid var(--rule); }
.lessons .num { font-family: ui-monospace, monospace; color: var(--accent); font-size: .85rem; }
.lessons a { text-decoration: none; font-size: 1.15rem; }
.lessons a:hover { text-decoration: underline; }
.lessons .desc { color: var(--muted); font-size: .95rem; margin-top: .2rem; }

/* ============================================================= *
 *  Studio chrome: login page, app masthead, topic cards         *
 * ============================================================= */

/* --- Login page --- */
.login-body { display: flex; min-height: 100vh; align-items: center; justify-content: center; }
.login-wrap { width: 100%; max-width: 23rem; padding: 1.5rem; }
.login-card {
  background: #fff; border: 1px solid var(--rule); border-radius: 10px;
  padding: 2.2rem 2rem 2rem; box-shadow: 0 1px 2px rgba(0,0,0,.04), 0 12px 32px -16px rgba(0,0,0,.18);
}
.login-card .kicker { margin-bottom: .5rem; }
.login-title { font-size: 1.7rem; margin: 0 0 .2rem; }
.login-sub { color: var(--muted); font-style: italic; font-size: .98rem; margin: 0 0 1.4rem; }
.field { display: block; font-size: .78rem; letter-spacing: .04em; text-transform: uppercase;
  color: var(--muted); margin: 0 0 1rem; }
.field input {
  display: block; width: 100%; margin-top: .35rem; padding: .6rem .7rem;
  font: inherit; font-size: 1rem; color: var(--ink); background: var(--paper);
  border: 1px solid var(--rule); border-radius: 6px; text-transform: none; letter-spacing: normal;
}
.field input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.login-btn {
  width: 100%; margin-top: .4rem; padding: .7rem 1rem; font: inherit; font-size: 1rem; font-weight: 600;
  color: #fff; background: var(--accent); border: 1px solid var(--accent);
  border-radius: 6px; cursor: pointer; transition: background .15s, transform .02s;
}
.login-btn:hover { background: #832f15; }
.login-btn:active { transform: translateY(1px); }
.login-error {
  margin: 0 0 1.1rem; padding: .6rem .8rem; font-size: .9rem; color: var(--bad);
  background: #f9eded; border: 1px solid #efd2d2; border-radius: 6px;
}

/* --- App masthead (landing) --- */
.app-head { position: relative; margin-bottom: 1rem; }
.app-name { font-size: 2.7rem; margin: 0 0 .3rem; }
.app-head .subtitle { margin-bottom: 1rem; }
.logout {
  position: absolute; top: .2rem; right: 0; font-family: ui-monospace, monospace;
  font-size: .7rem; letter-spacing: .12em; text-transform: uppercase; color: var(--muted);
  text-decoration: none; border: 1px solid var(--rule); border-radius: 5px; padding: .35rem .6rem;
}
.logout:hover { color: var(--accent); border-color: var(--accent); }

/* --- Topic cards --- */
.topics { display: grid; gap: 1.4rem; margin: 1.6rem 0 1rem; }
.topic-card { border: 1px solid var(--rule); border-radius: 9px; padding: 1.5rem 1.6rem; background: #fff; }
.topic-top { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; }
.topic-top h3 { margin: 0; font-size: 1.3rem; }
.topic-blurb { color: var(--muted); font-size: .98rem; margin: .5rem 0 1.1rem; }
.topic-empty { color: var(--muted); font-style: italic; }

/* Status pill */
.pill { flex: none; font-family: ui-monospace, monospace; font-size: .64rem; letter-spacing: .12em;
  text-transform: uppercase; padding: .25rem .55rem; border-radius: 999px; white-space: nowrap; }
.pill-active { color: var(--accent); background: var(--accent-soft); }
.pill-planned { color: var(--muted); background: #efeee9; }
.pill-done { color: var(--good); background: #eef6f0; }

/* Progress bar */
.progress { margin: .2rem 0 1.1rem; }
.progress-track { height: 7px; background: var(--rule); border-radius: 999px; overflow: hidden; }
.progress-fill { height: 100%; background: var(--accent); border-radius: 999px; transition: width .4s ease; }
.progress-label { margin-top: .4rem; font-family: ui-monospace, monospace; font-size: .72rem;
  letter-spacing: .04em; color: var(--muted); }

/* Milestones */
.milestones { list-style: none; padding: 0; margin: 0 0 1.1rem; }
.milestones li { position: relative; padding-left: 1.5rem; font-size: .92rem; color: var(--muted); margin: .3rem 0; }
.milestones li::before { content: "○"; position: absolute; left: 0; color: var(--rule); }
.milestones li.ms-done { color: var(--ink); }
.milestones li.ms-done::before { content: "●"; color: var(--good); }

/* Per-topic reference list (inside a topic card) */
.topic-refs { margin-top: 1.1rem; }
.topic-refs-label { font-family: ui-monospace, monospace; font-size: .66rem; letter-spacing: .12em;
  text-transform: uppercase; color: var(--muted); }
.topic-refs ul { margin: .3rem 0 0; padding-left: 1.1rem; }
.topic-refs li { font-size: .95rem; }

/* Topic lesson list */
.topic-lessons { list-style: none; padding: 0; margin: .4rem 0 0; border-top: 1px solid var(--rule); }
.topic-lessons li { padding: .8rem 0; border-bottom: 1px solid var(--rule); }
.topic-lessons .num { font-family: ui-monospace, monospace; color: var(--accent); font-size: .8rem; margin-right: .7rem; }
.topic-lessons a { text-decoration: none; font-size: 1.05rem; }
.topic-lessons a:hover { text-decoration: underline; }
.topic-lesson-desc { display: block; color: var(--muted); font-size: .9rem; margin-top: .2rem; }

/* --- Resume button (landing, injected by study.js) --- */
.resume { display: block; margin-top: 1.2rem; padding: .8rem 1rem; text-decoration: none;
  border: 1px solid var(--accent); background: var(--accent-soft); border-radius: 8px; }
.resume:hover { background: #f0ddd2; }
.resume-label { display: block; font-family: ui-monospace, monospace; font-size: .66rem;
  letter-spacing: .12em; text-transform: uppercase; color: var(--accent); }
.resume-title { display: block; color: var(--ink); font-size: 1.05rem; margin-top: .15rem; }

/* --- Completed lessons on the dashboard (toggled by study.js) --- */
.topic-lessons li.lesson-done .num { color: var(--good); }
.topic-lessons li.lesson-done > a::after { content: " ✓"; color: var(--good); font-weight: 700; }

/* --- Study widget on lesson pages (injected by study.js) --- */
.study { margin-top: 3rem; padding-top: 1.6rem; border-top: 2px solid var(--rule); }
.study.is-complete { border-top-color: var(--good); }
.study-row { display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
.study-check { display: inline-flex; align-items: center; gap: .55rem; cursor: pointer; font-size: 1rem; }
.study-check input { width: 1.15rem; height: 1.15rem; accent-color: var(--good); cursor: pointer; }
.study-status { font-family: ui-monospace, monospace; font-size: .72rem; letter-spacing: .04em; color: var(--muted); }
.study-notes-label { display: block; margin-top: 1.2rem; font-size: .78rem; letter-spacing: .04em;
  text-transform: uppercase; color: var(--muted); }
.study-notes { display: block; width: 100%; margin-top: .4rem; min-height: 7rem; padding: .8rem .9rem;
  font: inherit; font-size: 1rem; line-height: 1.5; color: var(--ink); background: #fff;
  border: 1px solid var(--rule); border-radius: 7px; resize: vertical; }
.study-notes:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }

@media print {
  body { background: #fff; }
  .wrap { padding: 0; max-width: 100%; }
  .quiz button { break-inside: avoid; }
  .logout, .resume, .study { display: none; }
  a { color: var(--ink); text-decoration: underline; }
}