/* ATL Maths log: one page, one spine. This week sits on top as a dark card,
   the plan runs forward down a timeline with pinned month labels, and the
   done log runs back below it. House style tokens only (theme.css). */

.atl-log {
  --atl-peach: color-mix(in srgb, var(--tangerine) 9%, var(--paper));
  --atl-tangerine-ink: color-mix(in srgb, var(--tangerine) 62%, var(--ink));
  --atl-gold-soft: color-mix(in srgb, var(--gold) 20%, var(--paper));
  --atl-gold-ink: color-mix(in srgb, var(--gold) 42%, var(--ink));
  --atl-bar-top: var(--jm-navbar-height, 56px);
  margin-top: -1rem;
  color: var(--ink);
  font-size: 1rem;
  line-height: 1.5;
  background:
    radial-gradient(900px 420px at 100% -80px, var(--atl-peach), transparent 70%),
    radial-gradient(800px 420px at -10% -60px, var(--mint), transparent 70%),
    var(--cream);
}
.atl-log :focus-visible { outline: 3px solid var(--tangerine); outline-offset: 2px; border-radius: 6px; }
.atl-wrap { max-width: 860px; margin-inline: auto; padding-inline: 16px; }
.atl-mono { font-family: var(--jm-font-mono); text-transform: uppercase; letter-spacing: .1em; font-size: .72rem; }

/* sticky bar, under the site navbar */
.atl-bar {
  position: sticky; top: var(--atl-bar-top); z-index: 20;
  background: color-mix(in srgb, var(--cream) 90%, transparent);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
  transition: top .22s ease;
}
/* The site bar only slides away below 992px; the class is set at every width. */
@media (max-width: 991.98px) {
  body:has(.jm-chrome-hidden) .atl-log { --atl-bar-top: 0px; }
}
.atl-bar-in { display: flex; align-items: center; gap: 10px 18px; flex-wrap: wrap; padding-block: 10px; }
.atl-brand { font-family: var(--jm-font-display); font-weight: 800; font-size: 1.12rem; letter-spacing: -.02em; }
.atl-brand b { color: var(--teal-deep); font-weight: 800; }
.atl-jump { display: flex; gap: 6px; margin-left: auto; }
.atl-jump a { text-decoration: none; padding: 6px 12px; border-radius: 999px; color: var(--ink); border: 1px solid var(--line); background: var(--paper); }
.atl-jump a:hover { border-color: var(--teal); }
.atl-jump a.is-on { background: var(--teal-ink); color: var(--cream); border-color: var(--teal-ink); }
.atl-year { display: block; width: 100%; height: 4px; border: 0; appearance: none; -webkit-appearance: none; background: var(--mint2); }
.atl-year::-webkit-progress-bar { background: var(--mint2); }
.atl-year::-webkit-progress-value { background: linear-gradient(90deg, var(--teal), var(--cyan)); }
.atl-year::-moz-progress-bar { background: linear-gradient(90deg, var(--teal), var(--cyan)); }

/* this week */
.atl-now { padding-block: 34px 6px; scroll-margin-top: 130px; }
.atl-now-card {
  scroll-margin-top: 130px;
  background: var(--teal-ink); color: var(--cream); border-radius: 22px;
  padding: clamp(22px, 4vw, 38px); box-shadow: var(--shadow); position: relative; overflow: hidden;
}
.atl-now-card::after {
  content: ""; position: absolute; right: -70px; top: -70px; width: 240px; height: 240px; border-radius: 50%;
  background: radial-gradient(circle, color-mix(in srgb, var(--teal) 55%, transparent), transparent 68%);
  pointer-events: none;
}
.atl-eyebrow { display: inline-flex; align-items: center; gap: 8px; color: var(--gold); }
.atl-pulse { width: 9px; height: 9px; border-radius: 50%; background: var(--tangerine); animation: atl-pulse 2.2s infinite; }
@keyframes atl-pulse {
  0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--tangerine) 60%, transparent); }
  70%, 100% { box-shadow: 0 0 0 10px transparent; }
}
.atl-now h1 {
  font-family: var(--jm-font-display); font-weight: 800; letter-spacing: -.025em; line-height: 1.02;
  font-size: clamp(2.1rem, 7vw, 3.75rem); margin: 12px 0 8px; text-wrap: balance; position: relative; z-index: 1; color: var(--cream);
}
.atl-now-date { color: var(--mint2); margin: 0 0 14px; }
.atl-now-lesson { max-width: 56ch; font-size: 1.08rem; margin: 0 0 20px; color: var(--cream); position: relative; z-index: 1; }
.atl-now-card .atl-video { color: var(--mint2); margin: 14px 0 0; }

.atl-steps { list-style: none; counter-reset: atl-step; margin: 14px 0 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }
.atl-steps li { counter-increment: atl-step; background: var(--mint); border: 1px solid var(--line); border-radius: 14px; padding: 10px 14px 12px; font-size: .94rem; }
.atl-steps li::before { content: counter(atl-step); display: block; font-family: var(--jm-font-mono); font-size: .72rem; color: var(--atl-tangerine-ink); }
.atl-steps b { color: var(--teal-deep); }

/* link buttons */
.atl-links { display: flex; flex-wrap: wrap; gap: 10px; position: relative; z-index: 1; }
.atl-btn {
  display: inline-flex; align-items: center; flex-wrap: wrap; gap: 2px 8px; text-decoration: none; font-weight: 600;
  padding: 10px 15px; border-radius: 12px; min-width: 0; color: var(--teal-ink); transition: transform .15s ease;
}
.atl-btn:hover { transform: translateY(-1px); color: var(--teal-ink); }
.atl-btn small { font-family: var(--jm-font-mono); font-size: .66rem; text-transform: uppercase; letter-spacing: .1em; opacity: .85; font-weight: 400; }
.atl-btn-lesson { background: var(--tangerine); }
.atl-btn-video { background: var(--cyan); }
.atl-btn-practice { background: var(--cream); }
.atl-btn-sheet { background: var(--gold); }
.atl-btn-booklet { background: var(--mint2); }
.atl-btn-cp { background: var(--atl-gold-soft); border: 1px solid var(--gold); color: var(--atl-gold-ink); }
.atl-btn-cp:hover { color: var(--atl-gold-ink); }
.atl-open .atl-btn-practice { background: var(--mint); border: 1px solid var(--line); }
.atl-video { color: var(--muted); margin: 10px 0 0; }

/* section heads */
.atl-section { padding-block: 44px 6px; scroll-margin-top: 110px; }
.atl-head { display: flex; align-items: baseline; gap: 6px 16px; flex-wrap: wrap; margin-bottom: 18px; }
.atl-head .atl-mono { color: var(--atl-tangerine-ink); width: 100%; }
.atl-head h2 { font-family: var(--jm-font-display); font-weight: 800; letter-spacing: -.02em; font-size: clamp(1.6rem, 4.4vw, 2.25rem); line-height: 1.1; margin: 0; text-wrap: balance; }
.atl-head p { margin: 0 0 0 auto; color: var(--muted); font-size: .9rem; }
.atl-empty { color: var(--muted); }

/* timeline */
.atl-months { position: relative; }
.atl-month { display: grid; grid-template-columns: 116px minmax(0, 1fr); gap: 0 14px; }
.atl-month-label { position: sticky; top: calc(var(--atl-bar-top) + 64px); align-self: start; padding-top: 14px; transition: top .22s ease; }
.atl-month-label b { display: block; font-family: var(--jm-font-display); font-weight: 800; font-size: 1.25rem; letter-spacing: -.02em; line-height: 1; }
.atl-month-label span { color: var(--muted); }
.atl-rows { position: relative; padding-left: 26px; display: flex; flex-direction: column; gap: 10px; padding-block: 8px 22px; }
.atl-rows::before { content: ""; position: absolute; left: 7px; top: 0; bottom: 0; width: 2px; background: var(--line); }
.atl-fill { position: absolute; top: 0; width: 2px; height: 0; z-index: 1; background: linear-gradient(var(--teal), var(--cyan)); pointer-events: none; }
.atl-done .atl-rows::before { background: color-mix(in srgb, var(--teal) 45%, var(--cream)); }

.atl-row { position: relative; scroll-margin-top: 150px; background: var(--paper); border: 1px solid var(--line); border-radius: 14px; transition: transform .35s ease, box-shadow .35s ease, border-color .2s; }
.atl-row::before {
  content: ""; position: absolute; left: -26px; top: 22px; width: 12px; height: 12px; border-radius: 50%; z-index: 2;
  background: var(--cream); border: 2px solid var(--line); transition: background .3s, border-color .3s, transform .3s;
}
.atl-row.is-passed::before { background: var(--teal); border-color: var(--teal); }
.atl-row.is-lifted { transform: translateX(6px); }
.atl-row[open] { border-color: var(--teal); box-shadow: var(--shadow); }
.atl-sum { list-style: none; display: grid; grid-template-columns: 64px minmax(0, 1fr) auto 22px; align-items: center; gap: 4px 14px; padding: 12px 14px; border-radius: 14px; }
summary.atl-sum { cursor: pointer; }
summary.atl-sum::-webkit-details-marker { display: none; }
summary.atl-sum:hover { background: var(--mint); }
.atl-day { text-align: center; line-height: 1; }
.atl-day b { display: block; font-family: var(--jm-font-display); font-weight: 800; font-size: 1.6rem; letter-spacing: -.03em; font-variant-numeric: tabular-nums; }
.atl-day span { color: var(--muted); font-size: .66rem; }
.atl-what { min-width: 0; }
.atl-wk { color: var(--teal-deep); }
.atl-what strong { display: block; font-family: var(--jm-font-display); font-weight: 700; font-size: 1.15rem; letter-spacing: -.01em; line-height: 1.2; }
.atl-tags { display: flex; gap: 6px; flex-wrap: wrap; justify-content: flex-end; align-items: center; }
.atl-tag { padding: 3px 9px; border-radius: 999px; font-size: .66rem; white-space: nowrap; }
.atl-tag-cp { background: var(--atl-gold-soft); color: var(--atl-gold-ink); border: 1px solid var(--gold); }
.atl-tag-ws { background: var(--mint2); color: var(--teal-deep); }
.atl-chev { justify-self: center; width: 9px; height: 9px; border-right: 2px solid var(--muted); border-bottom: 2px solid var(--muted); transform: rotate(45deg); transition: transform .2s; margin-bottom: 4px; }
.atl-row[open] .atl-chev { transform: rotate(225deg); margin: 4px 0 0; }
.atl-open { padding: 2px 14px 16px 92px; }
.atl-lesson { margin: 0 0 12px; max-width: 60ch; }
.atl-open .atl-btn { padding: 8px 13px; font-size: .92rem; }

.atl-gap { position: relative; border: 1.5px dashed var(--tangerine); background: var(--atl-peach); color: var(--atl-tangerine-ink); border-radius: 12px; padding: 9px 14px; display: flex; gap: 6px 12px; flex-wrap: wrap; align-items: baseline; }
.atl-gap::before { content: ""; position: absolute; left: -24px; top: 14px; width: 8px; height: 8px; border-radius: 50%; z-index: 2; background: var(--cream); border: 2px dashed var(--tangerine); }

.atl-done .atl-row { background: color-mix(in srgb, var(--paper) 70%, var(--mint)); }
.atl-done .atl-row::before { background: var(--teal); border-color: var(--teal); }
.atl-done .atl-day b { color: var(--teal-deep); }
.atl-tick { color: var(--teal-deep); font-weight: 700; }
.atl-trip .atl-what strong { color: var(--muted); }

.atl-back {
  position: fixed; right: 16px; bottom: calc(76px + env(safe-area-inset-bottom, 0px)); z-index: 30;
  background: var(--tangerine); color: var(--teal-ink); border-radius: 999px; padding: 11px 16px;
  font-weight: 700; font-size: .9rem; text-decoration: none; box-shadow: var(--shadow);
  opacity: 0; transform: translateY(12px); pointer-events: none; transition: opacity .25s, transform .25s;
}
.atl-back.is-shown { opacity: 1; transform: none; pointer-events: auto; }
.atl-back:hover { color: var(--teal-ink); }

.atl-foot { margin-top: 50px; border-top: 1px solid var(--line); padding-block: 18px 30px; color: var(--muted); display: flex; gap: 8px 20px; flex-wrap: wrap; }

@media (max-width: 640px) {
  .atl-month { grid-template-columns: minmax(0, 1fr); }
  .atl-month-label { z-index: 5; padding: 6px 0; background: color-mix(in srgb, var(--cream) 92%, transparent); display: flex; gap: 8px; align-items: baseline; }
  .atl-month-label b { font-size: 1.1rem; }
  .atl-sum { grid-template-columns: 50px minmax(0, 1fr) 22px; gap: 4px 10px; padding: 11px 10px; }
  .atl-tags { grid-column: 2 / -1; grid-row: 2; justify-content: flex-start; }
  .atl-tags:empty { display: none; }
  .atl-chev { grid-column: 3; grid-row: 1; }
  .atl-open { padding-left: 14px; }
  .atl-head p { margin-left: 0; }
  .atl-jump { margin-left: 0; }
  .atl-steps { grid-template-columns: minmax(0, 1fr); }
}
@media (prefers-reduced-motion: reduce) {
  .atl-pulse { animation: none; }
  .atl-row, .atl-row::before, .atl-back, .atl-btn, .atl-bar, .atl-month-label { transition: none; }
  .atl-row.is-lifted { transform: none; }
}