/*
  USMLE Gym - Global Styles
  Dark tech aesthetic with neon teal/blue accents
*/

:root {
	--bg: #f8fafc;
	--bg-elev: #ffffff;
	--text: #0f172a;
	--muted: #475569;
	--accent: #0ea5e9; /* professional blue */
	--accent-2: #0ea5e9;
	--glow: 0 0 0 rgba(0,0,0,0); /* minimize neon */
	--radius: 12px;
	--radius-sm: 8px;
	--shadow: 0 6px 20px rgba(2, 6, 23, 0.06);
	--container: 1160px;
	/* Type scale */
	--h1: clamp(32px, 5.2vw, 48px);
	--h2: clamp(22px, 3.4vw, 32px);
	--h3: 18px;
	--lead: 18px;
}

* {
	box-sizing: border-box;
}

html, body {
	margin: 0;
	padding: 0;
	background: var(--bg);
	color: var(--text);
	font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, 'Helvetica Neue', Arial, 'Noto Sans', 'Liberation Sans', sans-serif;
	line-height: 1.65;
	-webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.container {
	width: 100%;
	max-width: var(--container);
	margin: 0 auto;
	padding: 0 24px;
}

.visually-hidden { position: absolute !important; height: 1px; width: 1px; overflow: hidden; clip: rect(1px, 1px, 1px, 1px); white-space: nowrap; }

/* Focus styles */
:focus-visible { outline: 2px solid #0ea5e9; outline-offset: 2px; border-radius: 6px; }

/* Headings rhythm */
h1, h2, h3 { line-height: 1.2; }
h1 { margin: 8px 0 12px; font-size: var(--h1); font-weight: 800; letter-spacing: -0.01em; }
h2 { margin: 0 0 8px; font-size: var(--h2); font-weight: 700; }
h3 { margin: 4px 0 6px; font-size: var(--h3); font-weight: 700; }
.lead { font-size: var(--lead); color: var(--muted); }
.overline { text-transform: uppercase; letter-spacing: 0.12em; font-weight: 700; font-size: 12px; color: var(--accent); }

/* Header */
.header {
	position: sticky;
	top: 0;
	backdrop-filter: saturate(1.2) blur(8px);
	background: rgba(255,255,255,0.85);
	border-bottom: 1px solid rgba(2, 6, 23, 0.06);
	z-index: 50;
}

.nav {
	display: flex;
	align-items: center;
	justify-content: space-between;
	padding: 16px 0;
}

.brand {
	display: inline-flex;
	align-items: center;
	gap: 12px;
}

.brand-logo {
	width: 32px;
	height: 32px;
}

.brand-name {
	font-weight: 700;
	letter-spacing: 0.3px;
	font-size: 18px;
}

.nav-links {
	display: flex;
	gap: 18px;
}

.nav-link {
	color: var(--muted);
	padding: 10px 12px;
	border-radius: var(--radius-sm);
	transition: color 160ms ease, background 160ms ease;
	font-weight: 600;
}

.nav-link:hover,
.nav-link.active {
	color: var(--text);
	background: rgba(2, 132, 199, 0.08);
}

.cta {
	padding: 10px 16px;
	border-radius: 10px;
	background: var(--accent);
	color: #ffffff;
	font-weight: 600;
	border: none;
	cursor: pointer;
	transition: background 160ms ease, transform 120ms ease;
	box-shadow: var(--shadow);
}

.cta:hover { transform: translateY(-1px); background: #0284c7; }
.cta.ghost { background: transparent; color: var(--text); border: 1px solid rgba(2, 6, 23, 0.1); }
.cta.ghost:hover { background: rgba(2, 132, 199, 0.06); }

/* Hero */
.hero {
	position: relative;
	padding: 80px 0 64px 0;
	overflow: hidden;
	border-bottom: 1px solid rgba(2, 6, 23, 0.06);
}

.hero-grid {
	display: grid;
	grid-template-columns: 1.2fr 0.8fr;
	gap: 40px;
	align-items: center;
}

.eyebrow {
	display: inline-flex;
	align-items: center;
	gap: 10px;
	color: var(--accent);
	font-weight: 600;
	background: rgba(2, 132, 199, 0.08);
	padding: 6px 10px;
	border-radius: 999px;
}

.hero h1 {
    font-size: var(--h1);
	line-height: 1.1;
	margin: 16px 0 12px;
}

.hero p { color: var(--muted); font-size: var(--lead); margin: 0 0 24px 0; }
.hero-cta .cta { padding: 12px 18px; font-size: 15px; }

.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; }

.hero-visual {
	position: relative;
	background: var(--bg-elev);
	border: 1px solid rgba(2, 6, 23, 0.08);
	border-radius: var(--radius);
	min-height: 300px;
	box-shadow: var(--shadow);
	overflow: hidden;
}

.hero-canvas {
	position: absolute;
	inset: 0;
	width: 100%;
	height: 100%;
	display: block;
}

.hero-overlay-label {
	position: absolute;
	left: 16px;
	bottom: 16px;
	font-size: 12px;
	color: var(--muted);
	background: rgba(255, 255, 255, 0.9);
	padding: 6px 10px;
	border-radius: 8px;
	border: 1px solid rgba(2, 6, 23, 0.08);
}

/* Sections */
.section {
	padding: 72px 0;
}

.section h2 { font-size: var(--h2); margin: 0 0 8px 0; }

.section p.lead { color: var(--muted); margin: 0 0 24px; }

/* Services Grid */
.grid {
	display: grid;
	gap: 20px;
}

.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.card {
	background: var(--bg-elev);
	border: 1px solid rgba(2, 6, 23, 0.08);
	border-radius: var(--radius);
	padding: 18px;
	box-shadow: var(--shadow);
	transition: transform 120ms ease, box-shadow 160ms ease, border-color 160ms ease;
	position: relative;
	overflow: hidden;
}

.card:hover {
	transform: translateY(-2px);
	box-shadow: 0 10px 24px rgba(2, 6, 23, 0.10);
	border-color: rgba(2, 132, 199, 0.20);
}

.card h3 { margin: 8px 0 6px 0; font-size: 18px; }
.card p { margin: 0; color: var(--muted); }
/* Emphasize card titles for hierarchy */
.grid .card h3 { font-weight: 700; color: #0b1220; }
.grid .card p { font-size: 15px; }

.icon {
	width: 24px;
	height: 24px;
	margin-right: 8px;
}

.card-title { display: flex; align-items: center; }

/* Case Cards */
.case-card header { font-weight: 700; margin-bottom: 10px; color: var(--accent); }
.case-grid { grid-template-columns: repeat(3, 1fr); }
.case-meta { display: grid; gap: 8px; margin-top: 10px; }
.case-meta div { background: rgba(18, 214, 223, 0.06); border: 1px solid rgba(70, 167, 255, 0.2); border-radius: 10px; padding: 10px; }
.case-meta strong { color: var(--text); }

/* Footer */
.footer {
	margin-top: 32px;
	border-top: 1px solid rgba(2, 6, 23, 0.06);
	background: #ffffff;
	padding: 28px 0 48px 0;
}

.footer-top { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-bottom: 14px; }
.footer small { color: var(--muted); }
.social { display: flex; gap: 10px; }
.social a { color: var(--muted); padding: 8px 10px; border-radius: 8px; border: 1px solid rgba(2, 6, 23, 0.08); transition: color 160ms ease, background 160ms ease; }
.social a:hover { color: var(--text); background: rgba(2, 132, 199, 0.06); }

/* Utilities */
.row { display: flex; gap: 12px; flex-wrap: wrap; }
.muted { color: var(--muted); }
.spacer { height: 18px; }
.kbd { font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace; font-size: 12px; padding: 2px 6px; border-radius: 6px; background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.12); }

/* Reveal on scroll */
.reveal { opacity: 0; transform: translateY(8px); transition: opacity 420ms ease, transform 420ms ease; }
.reveal.show { opacity: 1; transform: translateY(0); }

/* Forms */
form { display: grid; gap: 14px; }
label { font-weight: 600; font-size: 14px; }
label { display: block; margin-bottom: 6px; }
input, textarea, select {
	background: rgba(255,255,255,0.04);
	border: 1px solid rgba(70, 167, 255, 0.22);
	color: var(--text);
	padding: 12px 12px;
	border-radius: 10px;
	outline: none;
	transition: border-color 160ms ease, box-shadow 160ms ease;
}

input:focus, textarea:focus, select:focus {
	border-color: rgba(18, 214, 223, 0.65);
	box-shadow: var(--glow);
}

textarea { min-height: 140px; resize: vertical; }

/* Form layout helpers */
.form-card { padding: 24px; }
.form-grid { display: grid; gap: 16px; }
.form-actions { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; margin-top: 4px; }
@media (min-width: 780px) {
	.form-grid.two-col { grid-template-columns: 1fr 1fr; }
	.form-grid .span-2 { grid-column: 1 / -1; }
}

/* Responsive */
/* Mobile nav */
.menu-btn { display: none; border: 1px solid rgba(2, 6, 23, 0.12); background: #ffffff; color: var(--text); padding: 8px 10px; border-radius: 8px; cursor: pointer; }

@media (max-width: 1060px) {
	.container { padding: 0 20px; }
	.grid-3 { grid-template-columns: 1fr 1fr; }
	.case-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 960px) {
	.hero-grid { grid-template-columns: 1fr; }
	.section { padding: 64px 0; }
}

@media (max-width: 640px) {
	.nav-links { display: none; position: absolute; right: 24px; top: 58px; background: #ffffff; border: 1px solid rgba(2,6,23,0.08); border-radius: 10px; padding: 8px; flex-direction: column; box-shadow: 0 10px 20px rgba(2,6,23,0.08); }
	.nav-links.show { display: flex; }
	.menu-btn { display: inline-flex; align-items: center; gap: 6px; font-size: 14px; padding: 8px 10px; }
	.grid-3, .case-grid { grid-template-columns: 1fr; }
	.hero { padding: 56px 0 40px 0; }
	.hero h1 { font-size: clamp(28px, 7vw, 40px); }
	.section { padding: 56px 0; }
	.container { padding: 0 16px; }
	input, textarea, select { padding: 12px 14px; }
}