*,
*::before,
*::after {
	box-sizing: border-box;
	margin: 0;
	padding: 0;
}

:root {
	--ink: #111210;
	--paper: #F8F7F3;
	--muted: #6B6A63;
	--border: #E0DED6;
	--accent: #1A6B45;
	--accent-light: #EBF4EE;
	--serif: 'Instrument Serif', Georgia, serif;
	--sans: 'DM Sans', sans-serif;

	--lecture: #6A4C93;
	--lecture-bg: #F2ECFB;
	--papers: #B35A1A;
	--papers-bg: #FBF0E8;
	--english: #1A5FA6;
	--english-bg: #EBF2FC;
	--math: #1A6B45;
	--math-bg: #EBF4EE;
}

body {
	font-family: var(--sans);
	background: var(--paper);
	color: var(--ink);
	min-height: 100vh;
}

.auth-hidden {
	display: none;
}

nav {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 24px;
	padding: 18px 48px;
	border-bottom: 1px solid var(--border);
	background: var(--paper);
	position: sticky;
	top: 0;
	z-index: 100;
}

.mock-banner:hover .mock-cta {
	background: #155c39;
}
.mock-cta {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 9px 16px;
  background: var(--accent);
  color: #ffffff;
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 500;
  border-radius: 8px;
  white-space: nowrap;
  flex-shrink: 0;
  transition: background 0.2s ease;
}
.mock-title {
  font-family: var(--serif);
  font-size: 18px;
  color: var(--ink);
  margin-bottom: 3px;
  line-height: 1.2;
}
.mock-banner {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 16px;
	background: var(--white);
	border: 1px solid var(--border);
	border-radius: 14px;
	padding: 22px 28px;
	margin-top: 16px;
	text-decoration: none;
	transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.mock-banner:hover {
	border-color: var(--ink);
	box-shadow: 0 6px 24px rgba(0, 0, 0, 0.07);
	transform: translateY(-2px);
}

@media (max-width: 480px) {
	.mock-banner {
		flex-direction: column;
		align-items: flex-start;
		padding: 18px 20px;
	}

	.mock-cta {
		align-self: flex-end;
	}
}

.mock-sub {
	font-size: 12px;
}

.mock-sub {
	font-size: 13px;
	color: var(--muted);
	font-weight: 300;
	line-height: 1.5;
}

.mock-icon {
	width: 44px;
	height: 44px;
	/* background: var(--surface); */
	border: 1px solid var(--border);
	border-radius: 10px;
	display: flex;
	align-items: center;
	justify-content: center;
	flex-shrink: 0;
	/* transition: background 0.2s ease; */
}

.mock-icon svg {
	width: 18px;
	height: 18px;
	stroke: var(--muted);
	transition: stroke 0.2s ease;
}

.brand-block {
	display: flex;
	flex-direction: column;
	align-items: flex-start;
	gap: 2px;
}

.logo {
	font-family: var(--serif);
	font-size: 22px;
	color: var(--ink);
	letter-spacing: -0.3px;
}

.logo span {
	color: var(--accent);
}

.tagline {
	font-size: 11px;
	color: var(--muted);
	font-weight: 500;
}

.nav-links {
	display: flex;
	gap: 32px;
	list-style: none;
}

.nav-links a {
	text-decoration: none;
	color: var(--muted);
	font-size: 14px;
	font-weight: 400;
	transition: color .2s;
}

.nav-links a:hover {
	color: var(--ink);
}

.nav-cta {
	background: var(--accent);
	color: var(--paper);
	padding: 9px 20px;
	border-radius: 6px;
	font-size: 14px;
	font-weight: 500;
	text-decoration: none;
	transition: opacity .2s;
}

.nav-cta:hover {
	opacity: .85;
}

main {
	max-width: 900px;
	margin: 0 auto;
	padding: 56px 24px 80px;
}

.page-header {
	margin-bottom: 30px;
}

.exam-badge {
	display: inline-block;
	font-size: 11px;
	font-weight: 500;
	letter-spacing: 1px;
	text-transform: uppercase;
	color: var(--accent);
	background: var(--accent-light);
	padding: 5px 12px;
	border-radius: 20px;
	margin-bottom: 16px;
}

.page-header h1 {
	font-family: var(--serif);
	font-size: clamp(28px, 4vw, 40px);
	font-weight: 400;
	line-height: 1.15;
	letter-spacing: -0.5px;
	margin-bottom: 10px;
}

.page-header h1 em {
	color: var(--accent);
	font-style: italic;
}

.page-header p {
	font-size: 15px;
	color: var(--muted);
	max-width: 680px;
	line-height: 1.5;
}

.subject-grid {
	display: grid;
	grid-template-columns: repeat(2, 1fr);
	gap: 16px;
}

.subject-card {
	display: flex;
	flex-direction: column;
	background: #fff;
	border: 1px solid var(--border);
	border-radius: 14px;
	padding: 24px 22px;
	text-decoration: none;
	color: var(--ink);
	transition: border-color .22s, box-shadow .22s, transform .18s;
}

.subject-card:hover {
	box-shadow: 0 8px 26px rgba(0, 0, 0, 0.06);
	transform: translateY(-2px);
}

#card-lecture:hover {
	border-color: var(--lecture);
}

#card-papers:hover {
	border-color: var(--papers);
}

#card-english:hover {
	border-color: var(--english);
}

#card-math:hover {
	border-color: var(--math);
}

.card-icon {
	width: 44px;
	height: 44px;
	border-radius: 10px;
	display: flex;
	align-items: center;
	justify-content: center;
	margin-bottom: 18px;
	flex-shrink: 0;
}

.card-icon svg {
	width: 22px;
	height: 22px;
}

.lecture-icon {
	background: var(--lecture-bg);
	color: var(--lecture);
}

.papers-icon {
	background: var(--papers-bg);
	color: var(--papers);
}

.english-icon {
	background: var(--english-bg);
	color: var(--english);
}

.math-icon {
	background: var(--math-bg);
	color: var(--math);
}

.card-top {
	display: flex;
	align-items: center;
	justify-content: space-between;
	margin-bottom: 8px;
	gap: 10px;
}

.card-top h2 {
	font-family: var(--serif);
	font-size: 20px;
	font-weight: 400;
}

.card-tag {
	font-size: 11px;
	font-weight: 500;
	letter-spacing: .6px;
	text-transform: uppercase;
	padding: 3px 9px;
	border-radius: 4px;
	color: var(--muted);
	background: var(--paper);
	border: 1px solid var(--border);
	white-space: nowrap;
}

.card-desc {
	font-size: 13px;
	color: var(--muted);
	line-height: 1.6;
	margin-bottom: 16px;
	min-height: 64px;
}

.card-meta {
	display: flex;
	gap: 18px;
	margin-bottom: 16px;
}

.meta-item {
	display: flex;
	flex-direction: column;
	gap: 2px;
}

.meta-label {
	font-size: 11px;
	color: var(--muted);
	text-transform: uppercase;
	letter-spacing: .5px;
}

.meta-value {
	font-size: 16px;
	font-weight: 500;
	color: var(--ink);
}

.card-start-btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	gap: 6px;
	margin-top: auto;
	padding: 10px 14px;
	border-radius: 8px;
	background: var(--accent);
	color: #fff;
	font-size: 13px;
	font-weight: 500;
	width: fit-content;
}

.card-start-btn svg {
	width: 14px;
	height: 14px;
}

footer {
	border-top: 1px solid var(--border);
	padding: 28px 48px;
	display: flex;
	justify-content: space-between;
	align-items: center;
	gap: 12px;
	font-size: 12px;
	color: var(--muted);
	flex-wrap: wrap;
}

@media (max-width: 980px) {
	nav {
		padding: 16px 24px;
	}

	main {
		max-width: 760px;
		padding: 44px 20px 64px;
	}

	.subject-grid {
		grid-template-columns: 1fr;
	}
}

@media (max-width: 680px) {
	nav {
		flex-wrap: wrap;
		gap: 12px;
		padding: 14px 16px;
	}

	.tagline {
		display: none;
	}

	.nav-links {
		display: grid;
		grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
		order: 3;
		width: 100%;
		gap: 8px;
		padding-top: 8px;
		border-top: 1px solid var(--border);
	}

	.nav-links a {
		display: inline-flex;
		align-items: center;
		justify-content: center;
		width: 100%;
		min-height: 36px;
		padding: 6px 8px;
		border: 1px solid var(--border);
		border-radius: 999px;
		background: #fff;
		color: var(--ink);
		font-weight: 500;
		font-size: 12px;
	}

	main {
		padding: 32px 14px 52px;
	}

	.subject-card {
		padding: 20px 16px 18px;
	}

	.card-desc {
		min-height: 0;
	}

	footer {
		padding: 20px 16px;
	}
}