/**
 * CTRL AI Design System — enterprise shell base (v5).
 * Shared foundation for home, tools, boards, auth (rolled out incrementally).
 */

@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=Noto+Sans+KR:wght@400;500;700;800&display=swap");

:root {
	--ctrlai-ds-font: "Inter", "Noto Sans KR", system-ui, -apple-system, sans-serif;
	--ctrlai-ds-max: 1040px;
	--ctrlai-ds-radius-sm: 8px;
	--ctrlai-ds-radius-md: 12px;
	--ctrlai-ds-radius-lg: 16px;
	--ctrlai-ds-radius-xl: 24px;

	--ctrlai-ds-bg: #f5f6f8;
	--ctrlai-ds-bg-elevated: #ffffff;
	--ctrlai-ds-surface: #ffffff;
	--ctrlai-ds-surface-muted: #f9fafb;
	--ctrlai-ds-border: rgba(15, 23, 42, 0.06);
	--ctrlai-ds-border-strong: rgba(15, 23, 42, 0.1);

	--ctrlai-ds-text: #1a2332;
	--ctrlai-ds-text-secondary: #4b5563;
	--ctrlai-ds-text-muted: #6b7280;

	--ctrlai-ds-accent: #4b6b9a;
	--ctrlai-ds-accent-hover: #3d5a82;
	--ctrlai-ds-accent-soft: rgba(75, 107, 154, 0.1);

	--ctrlai-ds-shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.04);
	--ctrlai-ds-shadow-sm: 0 4px 16px rgba(15, 23, 42, 0.06);
	--ctrlai-ds-shadow-md: 0 12px 40px rgba(15, 23, 42, 0.08);
	--ctrlai-ds-shadow-lg: 0 24px 64px rgba(15, 23, 42, 0.1);

	--ctrlai-ds-cat-office: #2563eb;
	--ctrlai-ds-cat-data: #059669;
	--ctrlai-ds-cat-auto: #7c3aed;
	--ctrlai-ds-cat-dev: #0891b2;
	--ctrlai-ds-cat-deep: #b45309;
}

body.ctrlai-dark-mode {
	--ctrlai-ds-bg: #0b0f17;
	--ctrlai-ds-bg-elevated: #111827;
	--ctrlai-ds-surface: #151c28;
	--ctrlai-ds-surface-muted: #1a2332;
	--ctrlai-ds-border: rgba(255, 255, 255, 0.08);
	--ctrlai-ds-border-strong: rgba(255, 255, 255, 0.14);
	--ctrlai-ds-text: #f1f5f9;
	--ctrlai-ds-text-secondary: #cbd5e1;
	--ctrlai-ds-text-muted: #94a3b8;
	--ctrlai-ds-accent: #3b82f6;
	--ctrlai-ds-accent-hover: #60a5fa;
	--ctrlai-ds-accent-soft: rgba(59, 130, 246, 0.12);
	--ctrlai-ds-shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.2);
	--ctrlai-ds-shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.25);
	--ctrlai-ds-shadow-md: 0 12px 40px rgba(0, 0, 0, 0.35);
	--ctrlai-ds-shadow-lg: 0 24px 64px rgba(0, 0, 0, 0.45);
}

/* Shell — base canvas for all app views */
.ctrlai-shell {
	width: 100%;
	font-family: var(--ctrlai-ds-font);
	color: var(--ctrlai-ds-text);
	box-sizing: border-box;
}

.ctrlai-shell__inner {
	width: min(100%, var(--ctrlai-ds-max));
	margin: 0 auto;
	padding: 0 var(--ctrlai-layout-pad-x, 16px);
	box-sizing: border-box;
}

/* Buttons */
.ctrlai-ds-btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	gap: 8px;
	min-height: 44px;
	padding: 0 22px;
	border-radius: 999px;
	font-family: inherit;
	font-size: 14px;
	font-weight: 600;
	line-height: 1;
	text-decoration: none;
	border: 1px solid transparent;
	cursor: pointer;
	transition: background 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease;
}

.ctrlai-ds-btn--primary {
	background: var(--ctrlai-ds-accent);
	color: #fff;
	box-shadow: var(--ctrlai-ds-shadow-xs);
}

a.ctrlai-ds-btn--primary,
a.ctrlai-ds-btn--primary:link,
a.ctrlai-ds-btn--primary:visited,
a.ctrlai-ds-btn--primary:hover,
a.ctrlai-ds-btn--primary:focus {
	color: #fff;
}

.ctrlai-ds-btn--primary:hover {
	background: var(--ctrlai-ds-accent-hover);
	color: #fff;
	box-shadow: var(--ctrlai-ds-shadow-sm);
	transform: translateY(-1px);
}

a.ctrlai-ds-btn--secondary,
a.ctrlai-ds-btn--secondary:link,
a.ctrlai-ds-btn--secondary:visited {
	color: var(--ctrlai-ds-text);
}

a.ctrlai-ds-btn--secondary:hover,
a.ctrlai-ds-btn--secondary:focus {
	color: var(--ctrlai-ds-text);
}

.ctrlai-ds-btn--secondary {
	background: var(--ctrlai-ds-surface);
	color: var(--ctrlai-ds-text);
	border-color: var(--ctrlai-ds-border-strong);
}

.ctrlai-ds-btn--secondary:hover {
	background: var(--ctrlai-ds-surface-muted);
	color: var(--ctrlai-ds-text);
	border-color: var(--ctrlai-ds-border-strong);
}

.ctrlai-ds-btn--ghost {
	background: transparent;
	color: var(--ctrlai-ds-text-secondary);
	border-color: var(--ctrlai-ds-border);
}

.ctrlai-ds-btn--ghost:hover {
	background: var(--ctrlai-ds-surface-muted);
	color: var(--ctrlai-ds-text);
}

/* Section header pattern */
.ctrlai-ds-section-head {
	margin-bottom: 24px;
}

.ctrlai-ds-section-head__eyebrow {
	margin: 0 0 8px;
	font-size: 12px;
	font-weight: 700;
	letter-spacing: 0.08em;
	text-transform: uppercase;
	color: var(--ctrlai-ds-accent);
}

.ctrlai-ds-section-head__title {
	margin: 0 0 8px;
	font-size: clamp(24px, 2.8vw, 32px);
	font-weight: 800;
	line-height: 1.2;
	letter-spacing: -0.03em;
	color: var(--ctrlai-ds-text);
}

.ctrlai-ds-section-head__desc {
	margin: 0;
	max-width: 52ch;
	font-size: 15px;
	line-height: 1.65;
	color: var(--ctrlai-ds-text-muted);
}

/* Surface card */
.ctrlai-ds-panel {
	background: var(--ctrlai-ds-surface);
	border: 1px solid var(--ctrlai-ds-border);
	border-radius: var(--ctrlai-ds-radius-lg);
	box-shadow: var(--ctrlai-ds-shadow-xs);
}