/* Landing page + the My Apps and Teacher Tools dashboards. (The physics dashboard uses phys/css.) */
:root {
	--bg: #f4f7fb; --card: #ffffff; --ink: #1b2a4a; --muted: #5d6b85;
	--line: #dde4ef; --accent: #2f6fd6; --accent-soft: #e6effc; --sun: #ffd23f;
	--teal: #0f8f86; --teal-soft: #e0f4f1; --plum: #7a4fd1; --plum-soft: #efe8fb;
}
@media (prefers-color-scheme: dark) {
	:root {
		--bg: #0f1726; --card: #172238; --ink: #e8eefb; --muted: #9fb0cc;
		--line: #263553; --accent: #7aa8ff; --accent-soft: #1d2d4d;
		--teal: #4fd1c5; --teal-soft: #15302f; --plum: #b69cf2; --plum-soft: #2a2145;
	}
}
* { box-sizing: border-box; }
html { background: var(--bg); }
body { margin: 0; background: var(--bg); color: var(--ink); font: 15px/1.5 Inter, system-ui, -apple-system, 'Segoe UI', sans-serif; }
a { color: var(--accent); }
.wrap { max-width: 1040px; margin: 0 auto; padding: 32px 16px 64px; }
.site-head { display: flex; align-items: center; gap: 16px; margin-bottom: 28px; flex-wrap: wrap; }
.site-head img { width: 60px; height: 60px; }
.site-head h1 { font: 600 32px/1.1 Fredoka, system-ui, sans-serif; margin: 0; }
.site-head p { margin: 3px 0 0; color: var(--muted); }
.site-head .crumb { margin-left: auto; font-size: 14px; }
section { margin-top: 30px; }
h2.label { font: 600 12.5px/1 Inter, sans-serif; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); margin: 0 0 12px; }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 12px; }
.grid.big { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 16px; }
a.card, div.card {
	display: block; padding: 16px 18px; background: var(--card); border: 1px solid var(--line);
	border-radius: 14px; color: inherit; text-decoration: none; transition: border-color .15s, transform .15s, box-shadow .15s;
}
a.card:hover, a.card:focus-visible { border-color: var(--accent); transform: translateY(-1px); outline: none; box-shadow: 0 8px 20px -14px rgb(27 42 74 / .5); }
.card b { display: block; font: 500 18px/1.3 Fredoka, system-ui, sans-serif; }
.card > span { display: block; color: var(--muted); font-size: 13.5px; margin-top: 3px; }
.card em {
	display: inline-block; margin-top: 10px; font-style: normal; font-size: 11.5px; font-weight: 600;
	padding: 2px 9px; border-radius: 999px; background: var(--accent-soft); color: var(--accent);
}
.card .ico { width: 40px; height: 40px; border-radius: 11px; display: grid; place-items: center; margin-bottom: 12px; background: var(--accent-soft); color: var(--accent); }
.card .ico svg { width: 22px; height: 22px; }
.card.teal .ico, .card.teal em { background: var(--teal-soft); color: var(--teal); }
.card.plum .ico, .card.plum em { background: var(--plum-soft); color: var(--plum); }
.card.sun .ico { background: #fff3c4; color: #8a6400; }
.card.space { padding: 20px 22px; }
.card.space b { font-size: 21px; }

/* dashboard app panels */
.panel { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 18px 20px; }
.panel-head { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.panel-head h3 { font: 600 20px/1.2 Fredoka, system-ui, sans-serif; margin: 0; }
.panel-head p { margin: 2px 0 0; color: var(--muted); font-size: 14px; }
.panel-head .ico { width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; background: var(--accent-soft); color: var(--accent); flex: none; }
.panel-head .ico svg { width: 24px; height: 24px; }
.panel.teal .panel-head .ico { background: var(--teal-soft); color: var(--teal); }
.panel.plum .panel-head .ico { background: var(--plum-soft); color: var(--plum); }
.panel-head .open { margin-left: auto; }
.btn {
	display: inline-flex; align-items: center; gap: 6px; padding: 8px 14px; border-radius: 9px;
	background: var(--accent); color: #fff; font: 600 14px/1.2 inherit; font-family: inherit; text-decoration: none; border: 0; cursor: pointer;
}
.btn:hover { filter: brightness(1.08); }
.btn.ghost { background: var(--card); color: var(--ink); border: 1px solid var(--line); }
.recent { list-style: none; margin: 14px 0 0; padding: 0; border-top: 1px solid var(--line); }
.recent li { display: flex; justify-content: space-between; gap: 12px; padding: 8px 2px; border-bottom: 1px solid var(--line); font-size: 14px; }
.recent li:last-child { border-bottom: 0; }
.recent .when { color: var(--muted); white-space: nowrap; font-size: 13px; }
.recent .kind { color: var(--muted); font-size: 12.5px; margin-left: 6px; }
.empty-note { color: var(--muted); font-size: 14px; margin: 12px 0 0; }
.stack { display: grid; gap: 16px; }
.cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 16px; }
.banner { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 16px; padding: 12px 16px; border-radius: 12px; background: #fff6d6; border: 1px solid #f0dc8a; color: #4a3b00; margin-bottom: 18px; }
.banner p { margin: 0; flex: 1 1 260px; }
@media (prefers-color-scheme: dark) { .banner { background: #2e2512; border-color: #6b5a1d; color: #f3e3b0; } }
.foot { margin-top: 40px; color: var(--muted); font-size: 13.5px; text-align: center; }
[hidden] { display: none !important; }
@media (max-width: 520px) { .site-head h1 { font-size: 26px; } .site-head .crumb { margin-left: 0; width: 100%; } }