/* CSS Reset & Base */
*,
*::before,
*::after {
	box-sizing: border-box;
	margin: 0;
	padding: 0;
}

:root {
	/* Kalm Logo Colors */
	--kalm-gray: #d9d9d9;
	--kalm-green: #46d77a;
	--kalm-blue: #4baae4;
	--kalm-dark: #303c48;

	/* Light mode colors */
	--bg-primary: #ffffff;
	--bg-secondary: #f8f9fa;
	--bg-tertiary: #e9ecef;
	--text-primary: #1a1a1a;
	--text-secondary: #4a5568;
	--text-tertiary: #718096;
	--border-color: #e2e8f0;
	--accent-primary: #4baae4;
	--accent-secondary: #46d77a;
	--accent-gradient: linear-gradient(135deg, #4baae4 0%, #46d77a 100%);
	--success: #46d77a;
	--error: #ef4444;
	--shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
	--shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
	--shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
	--shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
	--glow: 0 0 20px rgba(75, 170, 228, 0.3);
}

@media (prefers-color-scheme: dark) {
	:root:not(.light-mode-set) {
		--bg-primary: #0f172a;
		--bg-secondary: #1e293b;
		--bg-tertiary: #334155;
		--text-primary: #f1f5f9;
		--text-secondary: #cbd5e1;
		--text-tertiary: #94a3b8;
		--border-color: #334155;
		--accent-primary: #4baae4;
		--accent-secondary: #46d77a;
		--accent-gradient: linear-gradient(135deg, #4baae4 0%, #46d77a 100%);
		--shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
		--shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
		--shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.3);
		--shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.4);
		--glow: 0 0 30px rgba(75, 170, 228, 0.5);
	}
}

body.light-mode {
	--bg-primary: #ffffff;
	--bg-secondary: #f8f9fa;
	--bg-tertiary: #e9ecef;
	--text-primary: #1a1a1a;
	--text-secondary: #4a5568;
	--text-tertiary: #718096;
	--border-color: #e2e8f0;
	--accent-primary: #4baae4;
	--accent-secondary: #46d77a;
	--accent-gradient: linear-gradient(135deg, #4baae4 0%, #46d77a 100%);
	--success: #46d77a;
	--error: #ef4444;
	--shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
	--shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
	--shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
	--shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
	--glow: 0 0 20px rgba(75, 170, 228, 0.3);
}

body.dark-mode {
	--bg-primary: #0f172a;
	--bg-secondary: #1e293b;
	--bg-tertiary: #334155;
	--text-primary: #f1f5f9;
	--text-secondary: #cbd5e1;
	--text-tertiary: #94a3b8;
	--border-color: #334155;
	--accent-primary: #4baae4;
	--accent-secondary: #46d77a;
	--accent-gradient: linear-gradient(135deg, #4baae4 0%, #46d77a 100%);
	--shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
	--shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
	--shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.3);
	--shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.4);
	--glow: 0 0 30px rgba(75, 170, 228, 0.5);
}

html {
	scroll-behavior: smooth;
}

body {
	font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
	background: var(--bg-primary);
	color: var(--text-primary);
	line-height: 1.6;
	transition: background-color 0.3s ease, color 0.3s ease;
	overflow-x: hidden;
}

/* Top Navigation */
.top-nav {
	position: sticky;
	top: 0;
	z-index: 1000;
	background: var(--bg-primary);
	border-bottom: 1px solid var(--border-color);
	backdrop-filter: blur(10px);
	box-shadow: var(--shadow-sm);
	animation: slideDown 0.5s ease-out;
}

@keyframes slideDown {
	from {
		transform: translateY(-100%);
		opacity: 0;
	}
	to {
		transform: translateY(0);
		opacity: 1;
	}
}

.nav-container {
	max-width: 1400px;
	margin: 0 auto;
	padding: 1rem 2rem;
	display: flex;
	justify-content: space-between;
	align-items: center;
	gap: 2rem;
}

.nav-logo {
	display: flex;
	align-items: center;
	gap: 0.75rem;
	font-size: 1.5rem;
	font-weight: 700;
	color: var(--text-primary);
	text-decoration: none;
	transition: opacity 0.3s ease;
	cursor: pointer;
}

.nav-logo:hover {
	opacity: 0.8;
}

.nav-logo img {
	width: 40px;
	height: 40px;
	border-radius: 8px;
}

.nav-links {
	display: flex;
	gap: 2rem;
	align-items: center;
	flex: 1;
	justify-content: center;
}

.nav-link {
	color: var(--text-secondary);
	text-decoration: none;
	font-weight: 500;
	position: relative;
	padding: 0.5rem 0;
	transition: color 0.3s ease;
	display: flex;
	align-items: center;
	gap: 0.5rem;
}

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

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

.nav-link:hover::after,
.nav-link.active::after {
	width: 100%;
}

.github-icon {
	width: 18px;
	height: 18px;
	fill: currentColor;
}

.theme-toggle {
	background: var(--bg-secondary);
	border: 1px solid var(--border-color);
	border-radius: 50%;
	width: 44px;
	height: 44px;
	display: flex;
	align-items: center;
	justify-content: center;
	cursor: pointer;
	transition: all 0.3s ease;
	position: relative;
}

.theme-toggle:hover {
	transform: scale(1.1);
	box-shadow: var(--glow);
}

.theme-toggle svg {
	width: 20px;
	height: 20px;
	position: absolute;
	transition: all 0.3s ease;
}

.sun-icon {
	opacity: 1;
	transform: rotate(0deg);
}

.moon-icon {
	opacity: 0;
	transform: rotate(90deg);
}

body.dark-mode .sun-icon {
	opacity: 0;
	transform: rotate(-90deg);
}

body.dark-mode .moon-icon {
	opacity: 1;
	transform: rotate(0deg);
}

/* Hero Section */
.hero {
	position: relative;
	padding: 6rem 2rem 4rem;
	text-align: center;
	overflow: hidden;
}

.hero-content {
	position: relative;
	z-index: 2;
	max-width: 800px;
	margin: 0 auto;
	animation: fadeInUp 0.8s ease-out;
}

@keyframes fadeInUp {
	from {
		opacity: 0;
		transform: translateY(30px);
	}
	to {
		opacity: 1;
		transform: translateY(0);
	}
}

.hero-title {
	font-size: 4.5rem;
	font-weight: 900;
	margin-bottom: 1rem;
	line-height: 1.1;
}

.gradient-text {
	background: var(--accent-gradient);
	-webkit-background-clip: text;
	-webkit-text-fill-color: transparent;
	background-clip: text;
	animation: gradientShift 3s ease infinite;
	background-size: 200% 200%;
}

@keyframes gradientShift {
	0% {
		background-position: 0% 50%;
	}
	50% {
		background-position: 100% 50%;
	}
	100% {
		background-position: 0% 50%;
	}
}

.hero-subtitle {
	font-size: 1.75rem;
	color: var(--text-secondary);
	margin-bottom: 1.5rem;
	font-weight: 300;
}

.hero-description {
	font-size: 1.125rem;
	color: var(--text-tertiary);
	max-width: 600px;
	margin: 0 auto;
	line-height: 1.8;
}

.hero-animation {
	position: absolute;
	top: 50%;
	left: 50%;
	transform: translate(-50%, -50%);
	z-index: 1;
	pointer-events: none;
}

.pulse-ring {
	width: 300px;
	height: 300px;
	border: 2px solid var(--kalm-blue);
	border-radius: 50%;
	position: absolute;
	top: 50%;
	left: 50%;
	transform: translate(-50%, -50%);
	opacity: 0;
	animation: pulse 3s ease-out infinite;
}

.pulse-ring.delay-1 {
	animation-delay: 1s;
	border-color: var(--kalm-green);
}

.pulse-ring.delay-2 {
	animation-delay: 2s;
	border-color: var(--kalm-blue);
}

@keyframes pulse {
	0% {
		transform: translate(-50%, -50%) scale(0.3);
		opacity: 0.8;
	}
	100% {
		transform: translate(-50%, -50%) scale(1.5);
		opacity: 0;
	}
}

/* Split Section */
.split-section {
	padding: 2rem;
	max-width: 1400px;
	margin: 0 auto;
}

.split-container {
	display: grid;
	grid-template-columns: 1fr 1fr;
	gap: 2rem;
	animation: fadeIn 1s ease-out;
}

@keyframes fadeIn {
	from {
		opacity: 0;
	}
	to {
		opacity: 1;
	}
}

.code-panel,
.chat-panel {
	background: var(--bg-secondary);
	border: 1px solid var(--border-color);
	border-radius: 16px;
	overflow: hidden;
	box-shadow: var(--shadow-lg);
	transition: all 0.3s ease;
	display: flex;
	flex-direction: column;
}

.code-panel:hover,
.chat-panel:hover {
	box-shadow: var(--shadow-xl);
	transform: translateY(-2px);
}

.panel-header {
	padding: 1.5rem 2rem;
	border-bottom: 1px solid var(--border-color);
	display: flex;
	justify-content: space-between;
	align-items: center;
	background: var(--bg-tertiary);
}

.panel-header h3 {
	font-size: 1.25rem;
	font-weight: 600;
	color: var(--text-primary);
}

.language-badge {
	padding: 0.25rem 0.75rem;
	background: var(--accent-primary);
	color: white;
	border-radius: 6px;
	font-size: 0.875rem;
	font-weight: 500;
}

/* Code Block */
.code-block {
	padding: 2rem;
	background: var(--bg-primary);
	color: var(--text-primary);
	overflow-x: auto;
	font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
	font-size: 0.875rem;
	line-height: 1.6;
	margin: 0;
}

.code-block code {
	color: var(--text-primary);
}

/* Features Grid */
.features-grid {
	display: grid;
	grid-template-columns: repeat(2, 1fr);
	gap: 1rem;
	padding: 2rem;
}

.feature-card {
	padding: 1.5rem;
	background: var(--bg-primary);
	border: 1px solid var(--border-color);
	border-radius: 12px;
	transition: all 0.3s ease;
	cursor: default;
}

.feature-card:hover {
	transform: translateY(-4px);
	box-shadow: var(--glow);
	border-color: var(--accent-primary);
}

.feature-icon {
	font-size: 2rem;
	margin-bottom: 0.5rem;
}

.feature-card h4 {
	font-size: 1rem;
	margin-bottom: 0.5rem;
	color: var(--text-primary);
}

.feature-card p {
	font-size: 0.875rem;
	color: var(--text-tertiary);
	line-height: 1.5;
}

/* Chat Panel */
.chat-messages {
	flex: 1;
	padding: 1.5rem;
	overflow-y: auto;
	max-height: 500px;
	background: var(--bg-primary);
	display: flex;
	flex-direction: column;
	gap: 1rem;
}

.chat-messages::-webkit-scrollbar {
	width: 8px;
}

.chat-messages::-webkit-scrollbar-track {
	background: var(--bg-secondary);
}

.chat-messages::-webkit-scrollbar-thumb {
	background: var(--accent-primary);
	border-radius: 4px;
}

.system-message {
	padding: 1rem;
	background: var(--bg-tertiary);
	border-left: 3px solid var(--accent-primary);
	border-radius: 8px;
	color: var(--text-secondary);
	font-size: 0.875rem;
	display: flex;
	gap: 0.75rem;
	align-items: start;
	animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
	from {
		transform: translateX(-20px);
		opacity: 0;
	}
	to {
		transform: translateX(0);
		opacity: 1;
	}
}

.message-icon {
	font-size: 1.25rem;
}

.chat-message {
	padding: 1rem;
	background: var(--bg-secondary);
	border-radius: 12px;
	animation: slideIn 0.3s ease-out;
}

.chat-message.own-message {
	background: var(--accent-primary);
	color: white;
	align-self: flex-end;
	max-width: 80%;
}

.message-user {
	font-weight: 600;
	margin-bottom: 0.25rem;
	font-size: 0.875rem;
	color: var(--accent-secondary);
}

.chat-message.own-message .message-user {
	color: rgba(255, 255, 255, 0.9);
}

.message-text {
	font-size: 0.9375rem;
	line-height: 1.5;
}

.message-time {
	font-size: 0.75rem;
	color: var(--text-tertiary);
	margin-top: 0.25rem;
	opacity: 0.7;
}

.chat-message.own-message .message-time {
	color: rgba(255, 255, 255, 0.7);
}

/* Chat Input */
.chat-input-container {
	padding: 1.5rem;
	border-top: 1px solid var(--border-color);
	background: var(--bg-secondary);
	display: flex;
	flex-direction: column;
	gap: 0.75rem;
}

.username-input {
	width: 100%;
	padding: 0.75rem 1rem;
	border: 1px solid var(--border-color);
	border-radius: 8px;
	background: var(--bg-primary);
	color: var(--text-primary);
	font-size: 0.875rem;
	transition: all 0.3s ease;
}

.username-input:focus {
	outline: none;
	border-color: var(--accent-primary);
	box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.message-input-wrapper {
	display: flex;
	gap: 0.75rem;
}

.message-input {
	flex: 1;
	padding: 0.75rem 1rem;
	border: 1px solid var(--border-color);
	border-radius: 8px;
	background: var(--bg-primary);
	color: var(--text-primary);
	font-size: 0.9375rem;
	transition: all 0.3s ease;
}

.message-input:focus {
	outline: none;
	border-color: var(--accent-primary);
	box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.message-input:disabled {
	opacity: 0.5;
	cursor: not-allowed;
}

.send-button {
	padding: 0.75rem 1.25rem;
	background: var(--accent-primary);
	color: white;
	border: none;
	border-radius: 8px;
	cursor: pointer;
	transition: all 0.3s ease;
	display: flex;
	align-items: center;
	justify-content: center;
}

.send-button:hover:not(:disabled) {
	background: var(--accent-secondary);
	transform: scale(1.05);
	box-shadow: var(--glow);
}

.send-button:disabled {
	opacity: 0.5;
	cursor: not-allowed;
}

.send-button svg {
	width: 20px;
	height: 20px;
}

.connect-button {
	width: 100%;
	padding: 0.875rem 1.5rem;
	background: var(--accent-gradient);
	color: white;
	border: none;
	border-radius: 8px;
	font-weight: 600;
	cursor: pointer;
	transition: all 0.3s ease;
	font-size: 1rem;
}

.connect-button:hover {
	transform: translateY(-2px);
	box-shadow: var(--glow);
}

.connect-button.connected {
	background: var(--error);
}

/* Chat Disclaimer */
.chat-disclaimer {
	display: flex;
	align-items: start;
	gap: 0.5rem;
	padding: 0.75rem;
	background: var(--bg-tertiary);
	border-radius: 6px;
	margin-top: 0.75rem;
	border-left: 3px solid var(--accent-primary);
}

.disclaimer-icon {
	font-size: 1rem;
	flex-shrink: 0;
	margin-top: 0.125rem;
}

.chat-disclaimer p {
	margin: 0;
	font-size: 0.75rem;
	line-height: 1.4;
	color: var(--text-tertiary);
}

/* Connection Status */
.connection-status {
	display: flex;
	align-items: center;
	gap: 0.5rem;
	font-size: 0.875rem;
}

.status-dot {
	width: 10px;
	height: 10px;
	border-radius: 50%;
	background: var(--error);
	animation: blink 2s ease-in-out infinite;
}

@keyframes blink {
	0%, 100% {
		opacity: 1;
	}
	50% {
		opacity: 0.3;
	}
}

.connection-status.connected .status-dot {
	background: var(--success);
	animation: none;
}

.status-text {
	color: var(--text-tertiary);
}

/* Footer */
.footer {
	margin-top: 4rem;
	padding: 3rem 2rem;
	background: var(--bg-secondary);
	border-top: 1px solid var(--border-color);
}

.footer-content {
	max-width: 1400px;
	margin: 0 auto;
	text-align: center;
}

.footer-content p {
	color: var(--text-tertiary);
	margin-bottom: 1rem;
}

.footer-links {
	display: flex;
	justify-content: center;
	gap: 2rem;
}

.footer-links a {
	color: var(--text-secondary);
	text-decoration: none;
	transition: color 0.3s ease;
}

.footer-links a:hover {
	color: var(--accent-primary);
}

/* Responsive Design */
@media (max-width: 1024px) {
	.split-container {
		grid-template-columns: 1fr;
	}

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

	.hero-title {
		font-size: 3rem;
	}
}

@media (max-width: 768px) {
	.nav-container {
		padding: 1rem;
	}

	.nav-links {
		gap: 1rem;
		font-size: 0.875rem;
	}

	.hero {
		padding: 4rem 1rem 2rem;
	}

	.hero-title {
		font-size: 2.5rem;
	}

	.hero-subtitle {
		font-size: 1.25rem;
	}

	.split-section {
		padding: 1rem;
	}

	.panel-header {
		padding: 1rem;
	}

	.code-block {
		padding: 1rem;
		font-size: 0.75rem;
	}

	.features-grid {
		padding: 1rem;
	}
}

@media (max-width: 480px) {
	.nav-links {
		display: none;
	}

	.hero-title {
		font-size: 2rem;
	}

	.message-input-wrapper {
		flex-direction: column;
	}
}