/* ─── 1. Fonts & Tailwind ──────────────────────────────────────────────────── */
/* Tinos = Times substitute | Montserrat = Gotham substitute (De Gruyter Brill CI) */
@import url('https://fonts.googleapis.com/css2?family=Tinos:ital,wght@0,400;0,700;1,400;1,700&family=Montserrat:wght@400;500;600;700&display=swap');
@import 'tailwindcss';

/* ─── 2. Raw palette — never used directly in components ──────────────────── */
@theme {
	/* Brand palette constants */
	--palette-navy: #012851;
	--palette-mint: #a1dcd8;
	--palette-turquoise: #00c7b1;
	--palette-sand: #f0efe9;

	/* Typography */
	--font-sans: 'Montserrat', ui-sans-serif, system-ui, sans-serif;
	--font-serif: 'Tinos', 'Times New Roman', Georgia, serif;

	--text-huge: 4rem;
}

/* ─── 3. Semantic tokens — Tailwind utilities backed by CSS variables ──────── */
/*
   @theme inline makes Tailwind generate utility classes (bg-surface, text-ink,
   border-line, etc.) whose values are CSS custom properties, not hardcoded hex.
   Changing --c-surface on :root is all it takes to retheme the whole UI.
*/
@theme inline {
	/* Surfaces */
	--color-canvas: var(--c-canvas);
	--color-surface: var(--c-surface);
	--color-overlay: var(--c-overlay);
	--color-muted: var(--c-muted);

	/* Borders */
	--color-line: var(--c-line);
	--color-line-2: var(--c-line-2);

	/* Text */
	--color-ink: var(--c-ink);
	--color-ink-2: var(--c-ink-2);
	--color-ink-3: var(--c-ink-3);

	/* Accent (mint ↔ turquoise) */
	--color-accent: var(--c-accent);
	--color-accent-bg: var(--c-accent-bg);

	/* Primary interactive (navy ↔ mint) */
	--color-primary: var(--c-primary);
	--color-primary-fg: var(--c-primary-fg);

	/* Nav active state */
	--color-nav-active: var(--c-nav-active);

	/* PDF viewer */
	--color-pdf-bg: var(--c-pdf-bg);
	--color-pdf-ctrl: var(--c-pdf-ctrl);
	--color-pdf-text: var(--c-pdf-text);

	/* Static brand tokens (not themed) */
	--color-brand-navy: var(--palette-navy);
	--color-brand-mint: var(--palette-mint);
}

/* ─── 4. Light mode (default) ─────────────────────────────────────────────── */
:root {
	--c-canvas: #f0efe9;
	--c-surface: #ffffff;
	--c-overlay: #ffffff;
	--c-muted: #f5f4ef;

	--c-line: #e4e2d7;
	--c-line-2: #eeede8;

	--c-ink: #012851;
	--c-ink-2: #4b5563; /* gray-600 — 7.6:1 on white, 6.6:1 on canvas — WCAG AA ✓ */
	--c-ink-3: #6b7280; /* gray-500 — 4.8:1 on white — WCAG AA ✓; use only on surface, not canvas */

	--c-accent: #a1dcd8;
	--c-accent-bg: rgba(161, 220, 216, 0.15);

	--c-primary: #012851;
	--c-primary-fg: #ffffff;

	--c-nav-active: rgba(180, 185, 255, 0.15);

	--c-pdf-bg: #ebebeb;
	--c-pdf-ctrl: #d8d8d8;
	--c-pdf-text: #333333;
}

/* ─── 5. Dark mode ─────────────────────────────────────────────────────────── */
@media (prefers-color-scheme: dark) {
	:root:not([data-theme='light']) {
		--c-canvas: #0d0d0d;
		--c-surface: #1a1a1a;
		--c-overlay: #242424;
		--c-muted: #252525;

		--c-line: #3d3d3d;
		--c-line-2: #2e2e2e;

		--c-ink: #f0efe9;
		--c-ink-2: #9ca3af; /* gray-400 — 7.5:1 on dark surface — WCAG AAA ✓ */
		--c-ink-3: #8b97a5; /* gray-450 — 6.5:1 on dark surface — WCAG AA ✓ */

		--c-accent: #00c7b1;
		--c-accent-bg: rgba(0, 199, 177, 0.12);

		--c-primary: #a1dcd8;
		--c-primary-fg: #012851;

		--c-nav-active: rgba(180, 185, 255, 0.12);

		--c-pdf-bg: #1e1e1e;
		--c-pdf-ctrl: #2a2a2a;
		--c-pdf-text: #d1d1d1;
	}
}

/* Manual dark override — takes precedence over media query */
:root[data-theme='dark'] {
	--c-canvas: #0d0d0d;
	--c-surface: #1a1a1a;
	--c-overlay: #242424;
	--c-muted: #252525;

	--c-line: #3d3d3d;
	--c-line-2: #2e2e2e;

	--c-ink: #f0efe9;
	--c-ink-2: #9ca3af;
	--c-ink-3: #6b7280;

	--c-accent: #00c7b1;
	--c-accent-bg: rgba(0, 199, 177, 0.12);

	--c-primary: #a1dcd8;
	--c-primary-fg: #012851;

	--c-nav-active: rgba(180, 185, 255, 0.12);

	--c-pdf-bg: #1e1e1e;
	--c-pdf-ctrl: #2a2a2a;
	--c-pdf-text: #d1d1d1;
}

/* ─── 6. Icon inversion — De Gruyter icons are black SVGs loaded as <img> ──── */
/*
   In dark mode, invert all brand icons so they read as white on dark surfaces.
   Exclude .invert icons (already inverted for placement on dark backgrounds)
   so they don't get double-inverted back to black.
*/
@media (prefers-color-scheme: dark) {
	:root:not([data-theme='light']) img[src*='degruyter-icons']:not(.invert) {
		filter: invert(1);
	}
}

:root[data-theme='dark'] img[src*='degruyter-icons']:not(.invert) {
	filter: invert(1);
}

/* ─── 7. @mention chip ─────────────────────────────────────────────────────── */
/*
   Rendered by renderBody() via {@html ...} in CommentThread.svelte.
   Must live in global CSS — Svelte scoped styles don't reach injected HTML.
*/
.mention {
	display: inline;
	color: var(--c-ink);
	background-color: var(--c-accent-bg);
	border-radius: 3px;
	padding: 0 3px;
	font-weight: 600;
	font-style: normal;
	cursor: default;
	transition: background-color 0.15s ease;
}

.mention:hover {
	background-color: color-mix(in srgb, var(--c-accent) 25%, transparent);
}

/* ─── 8. Base styles ───────────────────────────────────────────────────────── */
@layer base {
	html {
		overscroll-behavior: none;
	}

	body {
		background-color: var(--c-canvas);
		color: var(--c-ink);
		font-family: var(--font-serif);
	}

	h1,
	h2,
	h3,
	h4,
	h5,
	h6 {
		font-family: var(--font-sans);
		font-weight: 600;
	}

	/* Form controls — always use surface bg and ink text so they theme correctly */
	input,
	textarea,
	select {
		background-color: var(--c-surface);
		color: var(--c-ink);
	}
}