:root {
	--c-primary: #0d6e6e;
	--c-primary-700: #0a5a5a;
	--c-secondary: #1f2937;
	--c-accent: #f59e0b;
	--c-bg: #ffffff;
	--c-surface: #f8fafc;
	--c-text: #111827;
	--c-text-muted: #6b7280;
	--c-border: #e5e7eb;
	--c-success: #15803d;
	--c-danger: #b91c1c;

	--ff-base: "Inter", "Segoe UI", Roboto, Arial, sans-serif;
	--ff-heading: "Inter", "Segoe UI", Roboto, Arial, sans-serif;

	--fs-100: 0.875rem;
	--fs-200: 1rem;
	--fs-300: 1.125rem;
	--fs-400: 1.25rem;
	--fs-500: 1.5rem;
	--fs-600: 2rem;
	--fs-700: 2.5rem;

	--space-1: 0.25rem;
	--space-2: 0.5rem;
	--space-3: 0.75rem;
	--space-4: 1rem;
	--space-5: 1.5rem;
	--space-6: 2rem;
	--space-7: 3rem;

	--radius-sm: 0.25rem;
	--radius-md: 0.5rem;
	--radius-lg: 0.75rem;

	--shadow-sm: 0 1px 2px rgb(17 24 39 / 0.08);
	--shadow-md: 0 8px 24px rgb(17 24 39 / 0.12);
}

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

html {
	font-size: 16px;
	scroll-behavior: smooth;
}

body {
	margin: 0;
	font-family: var(--ff-base);
	font-size: var(--fs-200);
	line-height: 1.6;
	color: var(--c-text);
	background-color: var(--c-bg);
	text-rendering: optimizelegibility;
	-webkit-font-smoothing: antialiased;
}

img,
svg,
video {
	display: block;
	max-width: 100%;
	height: auto;
}

a {
	color: var(--c-primary);
	text-decoration: none;
}

a:hover,
a:focus-visible {
	color: var(--c-primary-700);
	text-decoration: underline;
}

:focus-visible {
	outline: 2px solid var(--c-primary);
	outline-offset: 2px;
}

.arc-container {
	width: min(1200px, 100% - 2rem);
	margin-inline: auto;
}

.arc-section {
	padding-block: clamp(2rem, 4vw, 4rem);
}

.arc-card {
	background: var(--c-surface);
	border: 1px solid var(--c-border);
	border-radius: var(--radius-md);
	box-shadow: var(--shadow-sm);
	padding: var(--space-5);
}

.arc-btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	gap: var(--space-2);
	min-height: 44px;
	padding: 0.625rem 1rem;
	border-radius: var(--radius-sm);
	border: 1px solid transparent;
	font-weight: 600;
	cursor: pointer;
	transition: all 0.2s ease;
}

.arc-btn--primary {
	color: #fff;
	background: var(--c-primary);
}

.arc-btn--primary:hover,
.arc-btn--primary:focus-visible {
	background: var(--c-primary-700);
	text-decoration: none;
}