:root {
	color-scheme: light dark;
	--bg: #ffffff;
	--fg: #0b0d12;
	--muted: #5b6472;
	--accent: #2f6df6;
	--border: #e4e7ec;
	--danger: #b42318;
	--radius: 10px;
	--space: 1rem;
	--font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

@media (prefers-color-scheme: dark) {
	:root {
		--bg: #0b0d12;
		--fg: #f4f6fa;
		--muted: #9aa4b2;
		--accent: #6f9bff;
		--border: #232833;
		--danger: #ff9a8f;
	}
}

* {
	box-sizing: border-box;
}

body {
	margin: 0;
	background: var(--bg);
	color: var(--fg);
	font-family: var(--font);
	line-height: 1.55;
	-webkit-font-smoothing: antialiased;
}

.shell {
	max-width: 42rem;
	margin: 0 auto;
	padding: calc(var(--space) * 3) var(--space);
}

h1 {
	margin: 0 0 0.5rem;
	font-size: clamp(1.6rem, 4vw, 2.25rem);
	letter-spacing: -0.02em;
}

.lede {
	margin: 0 0 0.75rem;
	font-size: 1.05rem;
}

.hint {
	margin: 0;
	color: var(--muted);
}

.btn {
	display: inline-flex;
	align-items: center;
	gap: 0.5rem;
	padding: 0.55rem 0.9rem;
	border: 1px solid transparent;
	border-radius: var(--radius);
	background: var(--accent);
	color: #fff;
	font: inherit;
	font-weight: 500;
	cursor: pointer;
}

.btn:hover {
	filter: brightness(1.05);
}

.btn-secondary {
	background: transparent;
	color: var(--fg);
	border-color: var(--border);
}

.card {
	padding: var(--space);
	border: 1px solid var(--border);
	border-radius: var(--radius);
	background: var(--bg);
}

.input,
.select,
.textarea {
	width: 100%;
	padding: 0.55rem 0.7rem;
	border: 1px solid var(--border);
	border-radius: var(--radius);
	background: var(--bg);
	color: var(--fg);
	font: inherit;
}

.field {
	display: grid;
	grid-template-columns: minmax(0, 1fr);
	gap: 0.35rem;
	margin-bottom: var(--space);
}

.field > label {
	font-size: 0.875rem;
	color: var(--muted);
}

/*
 * 390px-safe, like .grid below. A grid with no column list gets one implicit
 * auto column, and an auto column is never narrower than its widest item's
 * min-content width. One nowrap scrolling strip (days, time slots) anywhere
 * inside an item therefore widened the whole column past the screen: the page
 * scrolled sideways instead of the strip scrolling on its own. minmax(0, 1fr)
 * caps the column at the container; the min-width rule keeps a child from
 * bringing the same floor back if an app redefines the columns. :where() adds
 * no specificity, so a min-width the app sets on a child still wins.
 */
.stack {
	display: grid;
	grid-template-columns: minmax(0, 1fr);
	gap: var(--space);
}

:where(.field, .stack, .list) > * {
	min-width: 0;
}

.row {
	display: flex;
	align-items: center;
	gap: 0.75rem;
	flex-wrap: wrap;
}

/*
 * 390px-safe. An unclamped minmax track overflows a 390px viewport once the
 * shell padding is subtracted, and nothing in the pipeline ever looked at a
 * phone-width layout, so every generated app inherited the horizontal scroll.
 * min() clamps the track to the container instead.
 */
.grid {
	display: grid;
	gap: var(--space);
	grid-template-columns: repeat(auto-fit, minmax(min(15rem, 100%), 1fr));
}

.list {
	display: grid;
	grid-template-columns: minmax(0, 1fr);
	gap: 0.5rem;
	margin: 0;
	padding: 0;
	list-style: none;
}

.list-item {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 0.75rem;
	flex-wrap: wrap;
	padding: 0.7rem 0.85rem;
	border: 1px solid var(--border);
	border-radius: var(--radius);
}

.table {
	width: 100%;
	border-collapse: collapse;
}

.table th,
.table td {
	padding: 0.6rem 0.5rem;
	text-align: left;
	border-bottom: 1px solid var(--border);
}

.table th {
	font-size: 0.8125rem;
	color: var(--muted);
	font-weight: 600;
}

.empty {
	padding: calc(var(--space) * 2);
	text-align: center;
	color: var(--muted);
}

.empty-title {
	margin: 0 0 0.25rem;
	color: var(--fg);
	font-weight: 600;
}

/* Loading. Every fetch has one; without a primitive each app invented its own. */
.loading {
	display: flex;
	align-items: center;
	justify-content: center;
	gap: 0.6rem;
	padding: calc(var(--space) * 1.5);
	color: var(--muted);
}

.spinner {
	flex: none;
	width: 1.15rem;
	height: 1.15rem;
	border: 2px solid var(--border);
	border-top-color: var(--accent);
	border-radius: 50%;
	animation: fab-spin 0.7s linear infinite;
}

@keyframes fab-spin {
	to {
		transform: rotate(360deg);
	}
}

/* Placeholder for content whose shape is known before its data arrives. */
.skeleton {
	display: block;
	height: 1rem;
	border-radius: calc(var(--radius) / 2);
	background: linear-gradient(90deg, var(--border), transparent, var(--border));
	background-size: 200% 100%;
	animation: fab-shimmer 1.2s linear infinite;
}

@keyframes fab-shimmer {
	to {
		background-position: -200% 0;
	}
}

/* Error strip: a failure the user can see and retry, never a silent no-op. */
.alert {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 0.75rem;
	flex-wrap: wrap;
	padding: 0.7rem 0.85rem;
	border: 1px solid var(--border);
	border-left: 3px solid var(--muted);
	border-radius: var(--radius);
}

.alert-error {
	border-left-color: var(--danger);
	color: var(--danger);
}

.badge {
	display: inline-block;
	padding: 0.1rem 0.5rem;
	border: 1px solid var(--border);
	border-radius: 999px;
	font-size: 0.8125rem;
	color: var(--muted);
}

/*
 * The scaffold had exactly one @media rule (prefers-color-scheme) and no width
 * breakpoint at all, so the shell was a 42rem column at every size.
 * Mobile-first stays the default; these only widen it.
 */
@media (min-width: 48rem) {
	.shell {
		max-width: 52rem;
		padding: calc(var(--space) * 3) calc(var(--space) * 1.5);
	}
}

@media (min-width: 64rem) {
	.shell {
		max-width: 64rem;
	}
}

@media (prefers-reduced-motion: reduce) {
	.spinner,
	.skeleton {
		animation: none;
	}
}

/* ---------- CampusRide: playful green & white ---------- */
:root {
	color-scheme: light;
	--bg: #fbfff7;
	--fg: #17331f;
	--muted: #5d7563;
	--accent: #22b55a;
	--accent-dark: #128a3f;
	--mint: #dff7e3;
	--sun: #ffd84d;
	--border: #17331f;
	--radius: 22px;
	--font: "Nunito", ui-rounded, system-ui, sans-serif;
	--display: "Fredoka", "Nunito", system-ui, sans-serif;
	--pop: 4px 4px 0 #17331f;
}
@media (prefers-color-scheme: dark) {
	:root { --bg: #fbfff7; --fg: #17331f; --muted: #5d7563; --accent: #22b55a; --border: #17331f; }
}
body {
	background: var(--bg) radial-gradient(#cdeed3 1.5px, transparent 1.5px) 0 0 / 22px 22px;
}
h1, h2, h3, .logo, .big, .hero-stat, .price { font-family: var(--display); letter-spacing: 0; }
h1 { font-size: clamp(2rem, 6vw, 3.2rem); line-height: 1.1; }
h2 { font-size: 1.6rem; margin: 0.5rem 0; }
.muted { color: var(--muted); }
.small { font-size: 0.85rem; }
.strong { font-weight: 800; }
.left { text-align: left; }
.green { color: var(--accent-dark); }

.btn {
	border: 2.5px solid var(--border);
	border-radius: 999px;
	padding: 0.65rem 1.25rem;
	font-weight: 800;
	box-shadow: var(--pop);
	transition: transform 0.12s, box-shadow 0.12s;
}
.btn:hover { transform: translate(-2px, -2px) rotate(-1deg); box-shadow: 6px 6px 0 var(--border); filter: none; }
.btn:active { transform: translate(2px, 2px); box-shadow: 1px 1px 0 var(--border); }
.btn:disabled { opacity: 0.6; cursor: wait; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-ghost { background: #fff; color: var(--fg); }
.btn-sm { padding: 0.4rem 0.9rem; font-size: 0.9rem; }
.plain, .linkish, .menu-btn, .nav-link {
	background: none; border: 0; font: inherit; color: inherit; cursor: pointer; padding: 0;
}
.linkish { color: var(--accent-dark); font-weight: 800; text-decoration: underline wavy; text-underline-offset: 4px; }

.card, .search-card, .ride-card, .feature, .hero-card {
	background: #fff;
	border: 2.5px solid var(--border);
	border-radius: var(--radius);
	box-shadow: var(--pop);
}
.input, .select, .textarea {
	border: 2px solid var(--border);
	border-radius: 14px;
	background: #fff;
	color: var(--fg);
	padding: 0.65rem 0.8rem;
}
.input:focus { background: var(--mint); }
.field > span, .field > label { font-weight: 800; font-size: 0.9rem; }

/* top bar */
.topbar { position: sticky; top: 0; z-index: 10; background: var(--accent); border-bottom: 3px solid var(--border); }
.topbar-in {
	max-width: 64rem; margin: 0 auto; padding: 0.7rem 1rem;
	display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
}
.logo { display: inline-flex; align-items: center; gap: 0.4rem; font-size: 1.5rem; font-weight: 700; color: #fff; }
.logo svg, .logo span:first-child { transform: rotate(-8deg); }
.menu-btn { display: none; color: #fff; font-size: 1.6rem; }
.nav { display: flex; align-items: center; gap: 0.35rem; flex-wrap: wrap; }
.nav-link { color: #fff; font-weight: 800; padding: 0.35rem 0.8rem; border-radius: 999px; }
.nav-link:hover { background: rgba(255,255,255,0.2); }
.nav-link.active { background: var(--sun); color: var(--fg); border: 2px solid var(--border); }
.topbar .btn-primary { background: var(--sun); color: var(--fg); }
@media (max-width: 47.99rem) {
	.menu-btn { display: block; }
	.nav { display: none; width: 100%; flex-direction: column; align-items: stretch; padding-bottom: 0.5rem; }
	.nav.open { display: flex; }
	.nav-link { text-align: left; }
}

/* hero */
.stack-lg { display: grid; grid-template-columns: minmax(0, 1fr); gap: 3rem; }
.hero { display: grid; grid-template-columns: minmax(0, 1fr); gap: 2rem; align-items: center; }
@media (min-width: 52rem) { .hero { grid-template-columns: 1.3fr 1fr; } }
.pill {
	display: inline-block; background: var(--sun); border: 2px solid var(--border); border-radius: 999px;
	padding: 0.25rem 0.85rem; font-weight: 800; transform: rotate(-2deg); margin-bottom: 1rem;
}
.lead { font-size: 1.15rem; color: var(--muted); }
.row-wrap { display: flex; flex-wrap: wrap; gap: 0.9rem; margin-top: 1.25rem; }
.row-tight { display: flex; align-items: center; gap: 0.6rem; min-width: 0; }
.hero-card { padding: 1.5rem; transform: rotate(2deg); background: var(--mint); display: grid; gap: 0.3rem; }
.hero-card hr { border: 0; border-top: 2px dashed var(--border); width: 100%; margin: 0.6rem 0; }
.hero-stat { font-size: 2.2rem; font-weight: 700; }

.features { display: grid; gap: 1.25rem; grid-template-columns: repeat(auto-fit, minmax(min(14rem, 100%), 1fr)); }
.feature { padding: 1.3rem; }
.feature:nth-child(odd) { transform: rotate(-1deg); }
.feature:nth-child(even) { transform: rotate(1deg); }
.feature h3 { margin: 0.6rem 0 0.3rem; font-size: 1.25rem; }
.feature p { margin: 0; }
.ficon {
	width: 3rem; height: 3rem; display: grid; place-items: center; font-size: 1.5rem;
	background: var(--mint); border: 2px solid var(--border); border-radius: 50%;
}

/* search + rides */
.welcome h1 { margin-bottom: 0.5rem; }
.search-card {
	padding: 1.25rem; display: grid; gap: 0 1rem;
	grid-template-columns: repeat(auto-fit, minmax(min(11rem, 100%), 1fr)); align-items: end;
}
.search-btn { margin-bottom: var(--space); justify-content: center; }
.section-title { margin-top: 1rem; }
.ride-grid { display: grid; gap: 1.25rem; grid-template-columns: repeat(auto-fill, minmax(min(18rem, 100%), 1fr)); }
.ride-card {
	padding: 1.1rem; text-align: left; font: inherit; color: inherit; cursor: pointer; display: grid; gap: 0.8rem;
	transition: transform 0.12s, box-shadow 0.12s;
}
.ride-card:hover { transform: translate(-2px, -3px) rotate(-0.6deg); box-shadow: 7px 7px 0 var(--border); }
.ride-top { display: flex; justify-content: space-between; align-items: flex-start; gap: 0.6rem; flex-wrap: wrap; }
.price {
	background: var(--sun); border: 2px solid var(--border); border-radius: 14px;
	padding: 0.2rem 0.6rem; font-weight: 700; font-size: 1.15rem; transform: rotate(3deg);
}
.route { display: grid; gap: 0.35rem; padding-left: 0.2rem; border-left: 3px dotted var(--accent); margin-left: 0.4rem; }
.route-line { display: flex; align-items: center; gap: 0.5rem; font-weight: 700; margin-left: -0.6rem; }
.dot { width: 0.9rem; height: 0.9rem; flex: none; border-radius: 50%; background: #fff; border: 3px solid var(--accent); }
.dot.end { background: var(--accent); }
.ride-meta { display: flex; flex-wrap: wrap; gap: 0.4rem; font-size: 0.85rem; font-weight: 700; }
.ride-meta > * { background: var(--mint); border-radius: 999px; padding: 0.15rem 0.6rem; }
.avatar {
	width: 2.6rem; height: 2.6rem; flex: none; display: grid; place-items: center; border-radius: 50%;
	background: var(--accent); color: #fff; font-family: var(--display); font-weight: 700; border: 2px solid var(--border);
}
.vbadge { display: inline-block; border-radius: 999px; padding: 0.1rem 0.6rem; font-size: 0.78rem; font-weight: 800; border: 2px solid var(--border); }
.vbadge.ok { background: var(--accent); color: #fff; }
.vbadge.no { background: #fff; color: var(--muted); border-style: dashed; }

/* auth */
.auth-card { max-width: 26rem; margin: 1rem auto; padding: 1.75rem; }

/* calculator */
.calc { display: grid; gap: 1.5rem; grid-template-columns: minmax(0, 1fr); }
@media (min-width: 48rem) { .calc { grid-template-columns: 1fr 1fr; } }
.result { background: var(--mint); display: grid; gap: 0.2rem; }
.big { font-size: 2.3rem; font-weight: 700; }
.note { font-size: 0.88rem; background: #fff; border: 2px dashed var(--border); border-radius: 14px; padding: 0.6rem 0.8rem; margin: 0.6rem 0 0; }

.footer {
	text-align: center; padding: 2rem 1rem; display: grid; gap: 0.5rem; justify-items: center;
	border-top: 3px solid var(--border); background: var(--mint); margin-top: 3rem;
}

:where(a, button, input, select, textarea):focus-visible {
	outline: 2px solid var(--accent);
	outline-offset: 2px;
}