/* Header & navigation */
.header {
	position: fixed;
	top: 0;
	left: 0;
	right: 0;
	background: rgba(255, 255, 255, 0.8);
	backdrop-filter: blur(30px) saturate(180%);
	-webkit-backdrop-filter: blur(30px) saturate(180%);
	border-bottom: 1px solid rgba(229, 231, 235, 0.3);
	z-index: 1000;
	box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 0 0 1px rgba(255, 255, 255, 0.5) inset;
	transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
	animation: slide-down 0.6s ease-out;
}

.header.scrolled {
	box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1), 0 0 60px rgba(99, 102, 241, 0.08), 0 0 0 1px rgba(255, 255, 255, 0.6) inset;
	background: rgba(255, 255, 255, 0.95);
	border-bottom-color: rgba(99, 102, 241, 0.1);
}

.header-content {
	display: flex;
	align-items: center;
	justify-content: space-between;
	height: 70px;
	gap: 16px;
}

@media (max-width: 1023px) {
	.header-content { height: 64px; }
}

@media (max-width: 480px) {
	.header-content { height: 60px; }
}

@media (min-width: 1400px) {
	.header-content { height: 80px; }
}

.logo {
	font-size: 20px;
	font-weight: 700;
	background: var(--gradient-primary);
	-webkit-background-clip: text;
	-webkit-text-fill-color: transparent;
	background-clip: text;
	text-decoration: none;
	transition: all 0.3s ease;
	padding: 8px 0;
	position: relative;
	display: inline-block;
}

.logo::after {
	content: '';
	position: absolute;
	bottom: 4px;
	left: 0;
	width: 0;
	height: 2px;
	background: var(--gradient-ai);
	transition: width 0.3s ease;
}

.logo:hover::after { width: 100%; }

.logo:hover {
	filter: brightness(1.2) drop-shadow(0 0 8px rgba(99, 102, 241, 0.5));
	transform: scale(1.05);
}

@media (max-width: 480px) {
	.logo { font-size: clamp(16px, 4vw, 18px); gap: 6px; padding: 6px 0; }
	.logo-icon { font-size: clamp(18px, 4vw, 20px); }
}

@media (min-width: 1400px) {
	.logo { font-size: 24px; gap: 12px; }
	.logo-icon { font-size: 32px; }
}

.nav { display: none; }

@media (min-width: 1024px) {
	.nav {
		display: flex;
		align-items: center;
		gap: clamp(20px, 2vw, 32px);
	}
}

@media (min-width: 1400px) {
	.nav { gap: 36px; }
}

.nav-link {
	color: var(--text-dark);
	text-decoration: none;
	font-weight: 500;
	font-size: clamp(14px, 1.8vw, 16px);
	transition: all 0.3s ease;
	padding: clamp(6px, 1vw, 10px) clamp(8px, 1.5vw, 14px);
	border-radius: 8px;
	display: flex;
	align-items: center;
	gap: clamp(4px, 0.8vw, 8px);
	position: relative;
	overflow: hidden;
	min-height: 44px;
	white-space: nowrap;
}

.nav-link::before {
	content: '';
	position: absolute;
	top: 0;
	left: -100%;
	width: 100%;
	height: 100%;
	background: linear-gradient(90deg, transparent, rgba(99, 102, 241, 0.1), transparent);
	transition: left 0.5s;
}

.nav-link:hover::before { left: 100%; }

.nav-link:hover {
	color: var(--primary-color);
	background: rgba(99, 102, 241, 0.08);
	transform: translateY(-1px);
}

.nav-icon {
	font-size: clamp(14px, 2vw, 18px);
	opacity: 0.8;
	transition: all 0.3s ease;
	line-height: 1;
}

.nav-text { font-size: clamp(13px, 1.8vw, 15px); }

.nav-link:hover .nav-icon {
	opacity: 1;
	transform: scale(1.2);
}

.nav-link:hover,
.nav-link.active { color: var(--primary-color); }

@media (min-width: 1024px) {
	.nav-link {
		padding: clamp(8px, 1vw, 12px) clamp(10px, 1.5vw, 16px);
		border-radius: 8px;
	}
}

@media (max-width: 480px) {
	.nav-link {
		font-size: clamp(13px, 3vw, 14px);
		padding: clamp(6px, 2vw, 8px) clamp(8px, 3vw, 10px);
		gap: 4px;
		min-height: 40px;
	}
	.nav-text { font-size: clamp(12px, 3vw, 13px); }
	.nav-icon { font-size: clamp(12px, 3vw, 14px); }
	.btn-icon { font-size: clamp(12px, 3vw, 14px); }
}

@media (min-width: 1400px) {
	.nav-link {
		font-size: 17px;
		padding: 12px 16px;
		gap: 10px;
	}
	.nav-text { font-size: 16px; }
	.nav-icon { font-size: 20px; }
	.btn-icon { font-size: 20px; }
}

.mobile-menu-btn {
	display: block;
	background: none;
	border: none;
	cursor: pointer;
	padding: 10px;
	border-radius: 8px;
	transition: all 0.3s ease;
	min-width: 44px;
	min-height: 44px;
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	gap: 4px;
}

.mobile-menu-btn:hover { background: rgba(99, 102, 241, 0.1); }

@media (max-width: 1023px) {
	.mobile-menu-btn { display: flex; }
}

@media (min-width: 1024px) {
	.mobile-menu-btn { display: none !important; }
}

.hamburger-line {
	display: block;
	width: 24px;
	height: 2px;
	background: var(--text-dark);
	margin: 4px 0;
	transition: all 0.3s ease;
	border-radius: 2px;
}

.mobile-menu-btn.active .hamburger-line:nth-child(1) {
	transform: rotate(45deg) translate(6px, 6px);
}

.mobile-menu-btn.active .hamburger-line:nth-child(2) { opacity: 0; }

.mobile-menu-btn.active .hamburger-line:nth-child(3) {
	transform: rotate(-45deg) translate(6px, -6px);
}

.mobile-menu {
	position: fixed;
	top: 70px;
	left: 0;
	right: 0;
	bottom: 0;
	background: linear-gradient(135deg, var(--nav-space) 0%, var(--nav-space-mid) 50%, var(--nav-space-dark) 100%);
	z-index: 3001;
	padding: clamp(16px, 4vw, 24px) clamp(20px, 5vw, 32px) clamp(24px, 6vw, 40px);
	display: block;
	opacity: 0;
	visibility: hidden;
	pointer-events: none;
	transform-origin: top;
	transform: translateY(-10px) scaleY(0.95);
	transition: transform 0.3s ease, opacity 0.3s ease, visibility 0.3s ease;
	overflow-y: auto;
	backdrop-filter: blur(20px);
	border-top: 1px solid rgba(255, 255, 255, 0.1);
}

@media (max-width: 1023px) {
	.mobile-menu { top: 64px; }
}

.mobile-menu.active {
	opacity: 1;
	visibility: visible;
	pointer-events: auto;
	transform: translateY(0) scaleY(1);
}

.mobile-backdrop {
	position: fixed;
	inset: 0;
	background: rgba(0, 0, 0, 0.6);
	z-index: 3000;
	opacity: 0;
	visibility: hidden;
	pointer-events: none;
	transition: opacity 0.3s ease, visibility 0.3s ease;
	backdrop-filter: blur(4px);
}

.mobile-backdrop.active {
	opacity: 1;
	visibility: visible;
	pointer-events: auto;
}

.mobile-menu-content { max-width: 400px; margin: 0 auto; }

.mobile-menu-header {
	position: sticky;
	top: 0;
	background: linear-gradient(135deg, var(--nav-space) 0%, var(--nav-space-mid) 50%, var(--nav-space-dark) 100%);
	padding-bottom: 16px;
	margin-bottom: 16px;
	z-index: 1;
	display: flex;
	align-items: center;
	justify-content: space-between;
	border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.mobile-menu-close {
	background: none;
	border: none;
	font-size: 24px;
	cursor: pointer;
	color: rgba(255, 255, 255, 0.8);
	padding: 8px;
	border-radius: 8px;
	transition: all 0.3s ease;
}

.mobile-menu-close:hover {
	color: var(--accent-emphasis);
	background: rgba(255, 255, 255, 0.1);
}

.mobile-nav {
	display: flex;
	flex-direction: column;
	gap: 16px;
}

.mobile-nav .nav-link {
	font-size: clamp(16px, 4vw, 20px);
	padding: clamp(14px, 3vw, 20px) clamp(16px, 4vw, 24px);
	border-radius: 12px;
	transition: all 0.3s ease;
	display: flex;
	align-items: center;
	gap: clamp(10px, 2.5vw, 16px);
	color: rgba(255, 255, 255, 0.9);
	background: rgba(255, 255, 255, 0.05);
	border: 1px solid rgba(255, 255, 255, 0.1);
	min-height: clamp(48px, 8vw, 60px);
	line-height: 1.3;
}

.mobile-nav .nav-link:hover {
	background: rgba(0, 212, 255, 0.1);
	color: var(--accent-emphasis);
	transform: translateY(-2px);
	box-shadow: 0 4px 16px rgba(0, 212, 255, 0.2);
	border-color: rgba(0, 212, 255, 0.3);
}

@media (max-width: 480px) {
	.mobile-menu {
		top: 60px;
		padding: clamp(12px, 3vw, 16px) clamp(16px, 4vw, 20px) clamp(20px, 5vw, 24px);
	}

	.mobile-nav .nav-link {
		font-size: clamp(15px, 3.5vw, 16px);
		padding: clamp(12px, 3vw, 14px) clamp(14px, 3vw, 16px);
		gap: 8px;
		min-height: 44px;
	}
}