/* =========================
   SUBJECT GRID SECTION
   ========================= */
.semester-grid-section {
	padding: 40px 0 80px;
	transition: background-color 0.35s ease;
}

.subject-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
	gap: 28px;
}

/* =========================
   SUBJECT CARD
   ========================= */
.subject-card {
	background-color: var(--surface-color);
	border: 1px solid var(--border-color);
	border-radius: var(--border-radius);
	padding: 26px;
	display: flex;
	flex-direction: column;
	position: relative;
	overflow: hidden;
	box-shadow: 0 6px 18px rgba(0, 0, 0, 0.05);
	transition:
		transform 0.3s ease,
		box-shadow 0.3s ease,
		background-color 0.35s ease,
		border-color 0.35s ease;
}

.subject-card:hover {
	transform: translateY(-6px);
	box-shadow: var(--shadow);
}

/* Subject Code Badge */
.subject-code {
	position: absolute;
	top: 14px;
	right: 14px;
	background-color: var(--primary-color);
	color: #fff;
	padding: 4px 12px;
	font-size: 0.75rem;
	font-weight: 600;
	border-radius: 999px;
	letter-spacing: 0.4px;
}

/* Subject Title */
.subject-card h3 {
	font-size: 1.35rem;
	font-weight: 600;
	color: var(--pure-black);
	margin-bottom: 10px;
	padding-right: 60px; /* space for code badge */
}

/* Subject Description */
.subject-card p {
	font-size: 0.95rem;
	color: var(--text-muted);
	line-height: 1.6;
	margin-bottom: 22px;
	flex-grow: 1;
}

/* Button Alignment */
.subject-card .btn {
	width: 100%;
	text-align: center;
	color: var(--text-color);
}

/* =========================
   EMPTY STATE
   ========================= */
.no-subjects {
	grid-column: 1 / -1;
	text-align: center;
	padding: 60px 20px;
	background-color: var(--off-white);
	border-radius: var(--border-radius);
	border: 1px dashed var(--border-color);
	transition:
		background-color 0.35s ease,
		border-color 0.35s ease;
}

.no-subjects h2 {
	color: var(--dark-blue);
	margin-bottom: 8px;
}

.no-subjects p {
	color: var(--text-muted);
}

/* =========================
   RESPONSIVE TWEAKS
   ========================= */
@media (max-width: 768px) {
	.semester-overview {
		padding: 20px 0;
	}

	.semester-overview p {
		font-size: 1rem;
	}

	.subject-card {
		padding: 22px;
	}

	.subject-card h3 {
		font-size: 1.25rem;
	}
}

@media (max-width: 480px) {
	.semester-grid-section {
		padding: 30px 0 60px;
	}

	.subject-grid {
		gap: 22px;
	}

	.subject-card {
		padding: 20px;
	}

	.subject-code {
		font-size: 0.7rem;
		padding: 3px 10px;
	}
}

/* =========================
   CARD ACTIONS (Multiple Buttons)
   ========================= */
.card-actions {
	display: flex;
	flex-wrap: wrap;
	gap: 8px;
	margin-top: auto;
}

.card-actions .btn {
	flex: 1 1 auto;
	min-width: 70px;
	padding: 10px 12px;
	font-size: 0.85rem;
}

.card-actions .btn-outline {
	background: transparent;
	border: 1px solid var(--border-color);
	color: var(--text-muted);
}

.card-actions .btn-outline:hover {
	border-color: var(--primary-color);
	color: var(--primary-color);
	background-color: rgba(45, 138, 110, 0.05);
}

/* =========================
   SEMESTER NAVIGATION
   ========================= */
.semester-nav-section {
	padding: 40px 0;
	background-color: var(--off-white);
	border-top: 1px solid var(--border-color);
}

.semester-nav-section h2 {
	text-align: center;
	font-size: 1.2rem;
	font-weight: 600;
	color: var(--text-color);
	margin-bottom: 20px;
}

.semester-nav-bar {
	display: flex;
	flex-wrap: wrap;
	justify-content: center;
	gap: 10px;
}

.sem-nav-link {
	padding: 10px 18px;
	background-color: var(--surface-color);
	border: 1px solid var(--border-color);
	border-radius: 8px;
	text-decoration: none;
	color: var(--text-color);
	font-size: 0.9rem;
	font-weight: 500;
	transition: all 0.2s ease;
}

.sem-nav-link:hover {
	border-color: var(--primary-color);
	color: var(--primary-color);
	transform: translateY(-2px);
}

.sem-nav-active {
	background-color: var(--primary-color);
	color: #fff;
	border-color: var(--primary-color);
}

@media (max-width: 580px) {
	.semester-nav-bar {
		gap: 8px;
	}

	.sem-nav-link {
		padding: 8px 14px;
		font-size: 0.8rem;
	}
}