/* /app/ as an app screen (includes/app/home.php): the sign-in screen and the course launcher. The bar is shell.css. */
html, body { height: auto; overflow: visible; }
.app-home { min-height: 100vh; background: var(--soft); font: 500 1.5rem/1.4 'Manrope', system-ui, sans-serif; color: var(--ink); }
.app-home .as-bar { position: sticky; top: 0; }
.app-home .as-grow { display: block; }

/* Sign-in */
.ah-signin { min-height: 100vh; box-sizing: border-box; display: grid; place-items: center; align-content: center; gap: 2rem; padding: 2.4rem 1.6rem; background: radial-gradient(80rem 50rem at 0% 0%, #efe1f6, transparent 70%), radial-gradient(70rem 40rem at 100% 100%, #fff4c8, transparent 70%), var(--soft); }
.ah-card { width: min(100%, 48rem); box-sizing: border-box; display: grid; gap: 1.6rem; padding: 4rem 3.6rem; border-radius: 2.8rem; background: #fff; box-shadow: 0 2.4rem 6rem rgba(36, 27, 46, 0.12); }
.ah-logo { justify-self: start; display: inline-flex; align-items: center; gap: 0.8rem; color: var(--ink); text-decoration: none; font: 800 1.8rem/1 'Montserrat', system-ui, sans-serif; }
.ah-logo .as-mark { background: var(--brand); color: #fff; }
.ah-card h1 { margin: 0.8rem 0 0; font: 800 3rem/1.15 'Montserrat', system-ui, sans-serif; letter-spacing: -0.02em; }
.ah-sub { margin: 0; color: var(--ink-2); font-size: 1.6rem; line-height: 1.55; }
.ah-msg { margin: 0; padding: 1.2rem 1.4rem; border-radius: 1.2rem; font-size: 1.5rem; }
.ah-msg.is-error { background: #fff0df; color: #99500a; }
.ah-msg.is-info { background: #e6f6fb; color: #136b84; }
.ah-form { display: grid; gap: 1rem; }
.ah-label { font-weight: 700; }
.ah-code { height: 6rem; box-sizing: border-box; padding: 0 1.8rem; border: 2px solid var(--line-strong); border-radius: 1.4rem; background: #fff; color: var(--ink); font: 700 2.6rem/1 'JetBrains Mono', ui-monospace, monospace; letter-spacing: 0.14em; text-transform: uppercase; }
.ah-code:focus { outline: none; border-color: var(--brand); box-shadow: 0 0 0 4px #f3e8f9; }
.ah-btn { display: inline-flex; align-items: center; justify-content: center; height: 5.2rem; box-sizing: border-box; padding: 0 2.4rem; border: 0; border-radius: 999px; background: var(--ink); color: #fff; font: 700 1.6rem/1 'Manrope', system-ui, sans-serif; text-decoration: none; cursor: pointer; transition: background 0.2s, color 0.2s; }
.ah-btn:hover { background: #ffdc4c; color: var(--ink); }
.ah-btn.is-line { background: #fff; color: var(--ink); border: 1.5px solid var(--line-strong); }
.ah-btn.is-line:hover { border-color: var(--ink); background: #fff; }
.ah-btn:focus-visible, .ah-filter:focus-visible, .ah-tab:focus-visible { outline: 3px solid var(--brand); outline-offset: 2px; }
.ah-alt { margin: 0.4rem 0 0; color: var(--ink-2); }
.ah-alt a { color: var(--brand-ink); font-weight: 700; }
.ah-back { margin: 0; }
.ah-back a { color: var(--muted); font-size: 1.4rem; }

/* The bar's sections */
.ah-tabs { display: flex; gap: 0.4rem; margin-left: 1.2rem; }
.ah-tab { display: inline-flex; align-items: center; height: 3.6rem; padding: 0 1.4rem; border-radius: 999px; color: rgba(255, 255, 255, 0.85); font-weight: 700; text-decoration: none; }
.ah-tab:hover { background: rgba(255, 255, 255, 0.12); color: #fff; }
.ah-tab[aria-current="page"] { background: rgba(255, 255, 255, 0.2); color: #fff; }

/* Launcher */
.ah-body { display: grid; grid-template-columns: 26rem minmax(0, 1fr); min-height: calc(100vh - var(--bar)); }
.ah-side { position: sticky; top: var(--bar); align-self: start; height: calc(100vh - var(--bar)); box-sizing: border-box; display: flex; flex-direction: column; gap: 2.4rem; padding: 2.4rem 1.6rem; overflow: auto; background: #fff; border-right: 1px solid var(--line); }
.ah-side-label { margin: 0 0 0.8rem 1.2rem; color: var(--muted); font: 600 1.2rem/1 'JetBrains Mono', ui-monospace, monospace; letter-spacing: 0.08em; text-transform: uppercase; }
.ah-filters { display: grid; gap: 0.4rem; }
.ah-filter { display: flex; align-items: center; justify-content: space-between; gap: 1rem; width: 100%; padding: 1.1rem 1.2rem; border: 0; border-radius: 1.2rem; background: transparent; color: var(--ink); font: 700 1.5rem/1.2 'Manrope', system-ui, sans-serif; text-align: left; cursor: pointer; }
.ah-filter:hover { background: var(--soft); }
.ah-filter[aria-pressed="true"] { background: #f3e8f9; color: var(--brand-ink); }
.ah-n { min-width: 2.4rem; padding: 0.3rem 0.8rem; border-radius: 999px; background: var(--soft); color: var(--muted); font: 600 1.2rem/1.2 'JetBrains Mono', ui-monospace, monospace; text-align: center; }
.ah-filter[aria-pressed="true"] .ah-n { background: #fff; color: var(--brand-ink); }
.ah-next { margin-top: auto; display: grid; gap: 1rem; padding: 1.8rem; border-radius: 1.6rem; background: var(--soft); }
.ah-next-h { margin: 0; font: 800 1.7rem/1.2 'Montserrat', system-ui, sans-serif; }
.ah-next p { margin: 0; color: var(--ink-2); font-size: 1.4rem; line-height: 1.5; }
.ah-next .ah-btn { height: 4.4rem; font-size: 1.5rem; }
.ah-main { min-width: 0; padding: 3.2rem clamp(1.6rem, 3vw, 4rem) 6rem; }
.ah-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 0.8rem 1.4rem; margin: 0 0 2.4rem; }
.ah-head h1 { margin: 0; font: 800 3.2rem/1.1 'Montserrat', system-ui, sans-serif; letter-spacing: -0.02em; }
.ah-count { color: var(--muted); font: 600 1.4rem/1.3 'JetBrains Mono', ui-monospace, monospace; }
.ah-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(24rem, 1fr)); gap: 2.4rem; }
.ah-tile { display: flex; flex-direction: column; overflow: hidden; border-radius: 2rem; background: #fff; color: var(--ink); text-decoration: none; box-shadow: 0 0.2rem 0.6rem rgba(36, 27, 46, 0.05), 0 1rem 2.4rem rgba(36, 27, 46, 0.06); transition: transform 0.2s, box-shadow 0.2s; }
.ah-tile:hover { transform: translateY(-4px); box-shadow: 0 1.6rem 3.6rem rgba(36, 27, 46, 0.14); }
.ah-tile:focus-visible { outline: 3px solid var(--brand); outline-offset: 3px; }
.ah-tile[hidden] { display: none; }
.ah-img { position: relative; display: block; aspect-ratio: 4 / 3; overflow: hidden; background: #f1ebf8; }
.ah-img img { display: block; width: 100%; height: 100%; object-fit: cover; }
.ah-info { display: grid; gap: 0.6rem; padding: 1.6rem 1.8rem 1.8rem; }
.ah-chip { justify-self: start; padding: 0.4rem 1rem; border-radius: 999px; background: #f3e8f9; color: var(--brand-ink); font: 600 1.2rem/1.2 'JetBrains Mono', ui-monospace, monospace; }
.ah-tile[data-series^="Logic"] .ah-chip { background: #eaf7ef; color: #2a7145; }
.ah-info b { font: 800 2rem/1.2 'Manrope', system-ui, sans-serif; }
.ah-open { display: inline-flex; align-items: center; gap: 0.4rem; color: var(--brand-ink); font-size: 1.5rem; font-weight: 700; }
.ah-play { position: absolute; inset: 0; margin: auto; width: 6.4rem; height: 6.4rem; border-radius: 50%; background: rgba(36, 27, 46, 0.78); }
.ah-play::after { content: ''; position: absolute; left: 2.5rem; top: 1.9rem; border-left: 1.9rem solid #fff; border-top: 1.3rem solid transparent; border-bottom: 1.3rem solid transparent; }

/* The tutorial player */
.ah-player { position: fixed; inset: 0; width: 100%; height: 100%; max-width: none; max-height: none; margin: 0; padding: 0; border: 0; background: rgba(20, 14, 28, 0.94); }
.ah-player[open] { display: grid; place-items: center; }
.ah-player::backdrop { background: transparent; }
.ah-player-box { width: min(92vw, 112rem); display: grid; gap: 1.2rem; }
.ah-player-title { margin: 0; color: #fff; font: 800 2rem/1.2 'Montserrat', system-ui, sans-serif; text-align: center; }
.ah-frame { position: relative; aspect-ratio: 16 / 9; overflow: hidden; border-radius: 1.6rem; background: #000; }
.ah-frame iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.ah-close { position: fixed; top: 2rem; right: 2rem; width: 4.8rem; height: 4.8rem; border: 0; border-radius: 50%; background: #fff; color: var(--ink); font: 700 2.6rem/1 'Manrope', system-ui, sans-serif; cursor: pointer; }
.ah-close:hover { background: #ffdc4c; }

/* Tablet and phone: the series as chips above, Next Steps below the courses */
@media (max-width: 900px) {
  .ah-body { display: flex; flex-direction: column; }
  .ah-side { display: contents; }
  .ah-filters { order: 1; display: flex; gap: 0.6rem; overflow-x: auto; padding: 1.2rem 1.6rem; background: #fff; border-bottom: 1px solid var(--line); }
  .ah-side-label { display: none; }
  .ah-filter { flex: none; width: auto; padding: 0.8rem 1.2rem; background: var(--soft); }
  .ah-main { order: 2; padding-top: 2.4rem; }
  .ah-next { order: 3; margin: 0 1.6rem 3.2rem; background: #fff; }
}
@media (max-width: 600px) {
  .ah-tabs { margin-left: 0.4rem; }
  .ah-tab { padding: 0 1rem; }
  .ah-head h1 { font-size: 2.6rem; }
  .ah-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.2rem; }
  .ah-info { padding: 1rem 1.2rem 1.2rem; gap: 0.4rem; }
  .ah-info b { font-size: 1.6rem; }
  .ah-chip { font-size: 1.05rem; }
  .ah-card { padding: 3.2rem 2.2rem; }
  .ah-card h1 { font-size: 2.6rem; }
}