/* CSS Reset */
*,
*::before,
*::after {
	box-sizing: border-box;
}

* {
	margin: 0;
	padding: 0;
}

html {
	-webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale;
	scroll-behavior: smooth;
}

body {
	line-height: 1.5;
	font-family:
		-apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial,
		sans-serif;
}

img,
picture,
video,
canvas,
svg {
	display: block;
	max-width: 100%;
}

input,
button,
textarea,
select {
	font: inherit;
}

/* Design Tokens - Light Mode (default) */
:root {
	/* Colors - Text */
	--color-text-primary: #1c1c1e;
	--color-text-secondary: #6b7280;
	--color-text-tertiary: #9ca3af;
	--color-text-inverse: #ffffff;

	/* Colors - Surface */
	--color-surface-background: #ffffff;
	--color-surface-grouped: #f5f7f7;
	--color-surface-elevated: #ffffff;
	--color-surface-overlay: rgba(0, 0, 0, 0.4);

	/* Colors - Border */
	--color-border-subtle: #d4dee0;
	--color-border-strong: #a5b5bf;

	/* Colors - Feedback */
	--color-feedback-success: #5a9b7a;
	--color-feedback-warning: #d4952a;
	--color-feedback-error: #c44d4d;
	--color-feedback-info: #6b5a75;

	/* Colors - Action */
	--color-action-primary: #6b5a75;
	--color-action-primary-pressed: #5a4a63;
	--color-action-disabled: #d1d1d6;

	/* Brand palette */
	--color-brand-lilac-ash: #b0a1ba;
	--color-brand-cool-steel: #a5b5bf;
	--color-brand-ash-grey: #abc8c7;
	--color-brand-celadon: #b8e2c8;
	--color-brand-celadon-light: #bff0d4;

	/* Typography */
	--font-size-title-large: 28px;
	--font-size-title-medium: 22px;
	--font-size-title-small: 18px;
	--font-size-body-primary: 16px;
	--font-size-body-secondary: 14px;
	--font-size-caption: 12px;

	--font-weight-regular: 400;
	--font-weight-semibold: 600;

	/* Spacing (4px base) */
	--spacing-xs: 4px;
	--spacing-sm: 8px;
	--spacing-md: 16px;
	--spacing-lg: 24px;
	--spacing-xl: 32px;
	--spacing-2xl: 48px;

	/* Border Radius */
	--radius-sm: 6px;
	--radius-md: 10px;
	--radius-lg: 14px;
	--radius-pill: 16px;
}

/* Dark Mode */
@media (prefers-color-scheme: dark) {
	:root {
		/* Colors - Text */
		--color-text-primary: #f2f2f7;
		--color-text-secondary: #aeaeb2;
		--color-text-tertiary: #636366;
		--color-text-inverse: #1c1c1e;

		/* Colors - Surface */
		--color-surface-background: #000000;
		--color-surface-grouped: #1c1c1e;
		--color-surface-elevated: #2c2c2e;
		--color-surface-overlay: rgba(0, 0, 0, 0.6);

		/* Colors - Border */
		--color-border-subtle: #3d4548;
		--color-border-strong: #5a6a70;

		/* Colors - Feedback */
		--color-feedback-success: #8fd4a8;
		--color-feedback-warning: #ffbb5c;
		--color-feedback-error: #ff6b6b;
		--color-feedback-info: #c4b5ce;

		/* Colors - Action */
		--color-action-primary: #c4b5ce;
		--color-action-primary-pressed: #d5c9dd;
		--color-action-disabled: #3a3a3c;
	}
}

/* Base Styles */
body {
	background-color: var(--color-surface-background);
	color: var(--color-text-primary);
}

/* Utility: Container */
.container {
	width: 100%;
	max-width: 1200px;
	margin: 0 auto;
	padding: 0 var(--spacing-md);
}

/* Hero Section */
.hero {
	min-height: 100vh;
	min-height: 100svh;
	display: flex;
	align-items: center;
	justify-content: center;
	padding: var(--spacing-xl) var(--spacing-md);
}

.hero-content {
	max-width: 560px;
	text-align: center;
}

.logo {
	font-size: 48px;
	font-weight: var(--font-weight-semibold);
	color: var(--color-action-primary);
	margin-bottom: var(--spacing-lg);
	letter-spacing: -0.02em;
}

.headline {
	font-size: 32px;
	font-weight: var(--font-weight-semibold);
	color: var(--color-text-primary);
	line-height: 1.2;
	margin-bottom: var(--spacing-md);
}

.tagline {
	font-size: var(--font-size-body-primary);
	color: var(--color-text-secondary);
	line-height: 1.6;
	margin-bottom: var(--spacing-xl);
}

.app-store-badge {
	display: inline-block;
	transition: opacity 0.2s ease;
	border-radius: var(--radius-sm);
}

.app-store-badge:hover {
	opacity: 0.8;
}

.app-store-badge:focus-visible {
	outline: 2px solid var(--color-action-primary);
	outline-offset: 2px;
}

.app-store-badge svg {
	width: 150px;
	height: 50px;
}

/* Features Section */
.features {
	padding: var(--spacing-2xl) var(--spacing-md);
	background-color: var(--color-surface-grouped);
}

.features-grid {
	max-width: 960px;
	margin: 0 auto;
	display: grid;
	grid-template-columns: 1fr;
	gap: var(--spacing-lg);
}

.feature {
	background-color: var(--color-surface-elevated);
	border-radius: var(--radius-lg);
	padding: var(--spacing-lg);
}

.feature-icon {
	width: 48px;
	height: 48px;
	border-radius: var(--radius-md);
	background-color: var(--color-surface-grouped);
	display: flex;
	align-items: center;
	justify-content: center;
	margin-bottom: var(--spacing-md);
}

.feature-icon svg {
	width: 24px;
	height: 24px;
	color: var(--color-action-primary);
}

.feature-title {
	font-size: var(--font-size-title-small);
	font-weight: var(--font-weight-semibold);
	color: var(--color-text-primary);
	margin-bottom: var(--spacing-sm);
}

.feature-description {
	font-size: var(--font-size-body-primary);
	color: var(--color-text-secondary);
	line-height: 1.6;
}

/* Screenshots Section */
.screenshots {
	padding: var(--spacing-2xl) var(--spacing-md);
	background-color: var(--color-surface-background);
}

.screenshots-title {
	font-size: var(--font-size-title-medium);
	font-weight: var(--font-weight-semibold);
	color: var(--color-text-primary);
	text-align: center;
	margin-bottom: var(--spacing-xl);
}

.screenshots-container {
	display: flex;
	justify-content: center;
	align-items: flex-start;
	gap: var(--spacing-md);
	overflow-x: auto;
	padding: var(--spacing-md) var(--spacing-md);
	-webkit-overflow-scrolling: touch;
	scroll-snap-type: x mandatory;
	scrollbar-width: none;
}

.screenshots-container::-webkit-scrollbar {
	display: none;
}

.device-frame {
	flex-shrink: 0;
	width: 180px;
	aspect-ratio: 390 / 844;
	background-color: var(--color-text-primary);
	border-radius: 24px;
	padding: 8px;
	position: relative;
	scroll-snap-align: center;
}

.device-notch {
	position: absolute;
	top: 12px;
	left: 50%;
	transform: translateX(-50%);
	width: 60px;
	height: 20px;
	background-color: var(--color-text-primary);
	border-radius: 10px;
	z-index: 1;
}

.screenshot-placeholder {
	width: 100%;
	height: 100%;
	background-color: var(--color-surface-grouped);
	border-radius: 18px;
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	gap: var(--spacing-sm);
	border: 2px dashed var(--color-border-strong);
}

.placeholder-label {
	font-size: var(--font-size-body-secondary);
	font-weight: var(--font-weight-semibold);
	color: var(--color-text-secondary);
}

.placeholder-size {
	font-size: var(--font-size-caption);
	color: var(--color-text-tertiary);
}

/* Tablet styles */
@media (min-width: 600px) {
	.logo {
		font-size: 56px;
	}

	.headline {
		font-size: 38px;
	}

	.features-grid {
		grid-template-columns: repeat(2, 1fr);
		gap: var(--spacing-lg);
	}

	.device-frame {
		width: 200px;
	}
}

/* Desktop styles */
@media (min-width: 768px) {
	.logo {
		font-size: 64px;
	}

	.headline {
		font-size: 44px;
	}

	.tagline {
		font-size: var(--font-size-title-small);
	}

	.features-grid {
		gap: var(--spacing-xl);
	}

	.feature {
		padding: var(--spacing-xl);
	}

	.screenshots {
		padding: var(--spacing-2xl) var(--spacing-xl);
	}

	.screenshots-title {
		font-size: var(--font-size-title-large);
		margin-bottom: var(--spacing-2xl);
	}

	.screenshots-container {
		gap: var(--spacing-xl);
		padding: var(--spacing-md) 0;
	}

	.device-frame {
		width: 240px;
		border-radius: 32px;
		padding: 10px;
	}

	.device-notch {
		top: 14px;
		width: 80px;
		height: 24px;
		border-radius: 12px;
	}

	.screenshot-placeholder {
		border-radius: 24px;
	}

	.placeholder-label {
		font-size: var(--font-size-body-primary);
	}

	.placeholder-size {
		font-size: var(--font-size-body-secondary);
	}
}

/* Footer */
.footer {
	padding: var(--spacing-xl) var(--spacing-md);
	background-color: var(--color-surface-grouped);
	border-top: 1px solid var(--color-border-subtle);
}

.footer-content {
	max-width: 960px;
	margin: 0 auto;
	display: flex;
	flex-direction: column;
	align-items: center;
	gap: var(--spacing-md);
	text-align: center;
}

.footer-logo {
	font-size: var(--font-size-title-small);
	font-weight: var(--font-weight-semibold);
	color: var(--color-action-primary);
	letter-spacing: -0.02em;
}

.footer-links {
	display: flex;
	flex-wrap: wrap;
	justify-content: center;
	gap: var(--spacing-md) var(--spacing-lg);
}

.footer-link {
	font-size: var(--font-size-body-secondary);
	color: var(--color-text-secondary);
	text-decoration: none;
	transition: color 0.2s ease;
	padding: var(--spacing-sm) var(--spacing-xs);
	min-height: 44px;
	display: inline-flex;
	align-items: center;
	border-radius: var(--radius-sm);
}

.footer-link:hover {
	color: var(--color-action-primary);
}

.footer-link:focus-visible {
	outline: 2px solid var(--color-action-primary);
	outline-offset: 2px;
}

.footer-copyright {
	font-size: var(--font-size-caption);
	color: var(--color-text-tertiary);
}