app.css

@import '@fontsource/jetbrains-mono/400.css';
@import '@fontsource/jetbrains-mono/500.css';
@import '@fontsource/jetbrains-mono/700.css';
@import '@fontsource/jetbrains-mono/800.css';
@import '@fontsource/unbounded/700.css';
@import '@fontsource/unbounded/800.css';
@import '@fontsource/unbounded/900.css';

/* ============================================================
   Design Tokens — "color fields / brutal" (v1.12.0)
   Dark only. Near-black page on a faint 24px grid, off-white ink,
   one solid hue per domain, 3px rules, hard offset shadows, square
   corners. Anything with a shadow can be pressed: it sinks into it.
   Tokens only — patterns live in components (audit Decision 4).
   See docs/architecture/design-system.md.
   ============================================================ */
:root {
	color-scheme: dark;

	/* Ink & paper */
	--color-ink: #0a0a0a;
	--color-paper: #f2f0ea;
	--color-grid: #171717;

	--color-bg: #0a0a0a;
	--color-surface-1: #0f0f0f;
	--color-surface-2: #121212;
	--color-surface-3: #1c1c1b;
	--color-border: #3a3936;
	--color-border-strong: var(--color-paper);

	/* Domain fields — one hue per area. Ink (#0a0a0a) always sits on top. */
	--field-train: oklch(0.76 0.13 235);
	--field-habit: oklch(0.76 0.13 30);
	--field-base: oklch(0.76 0.13 300);
	--field-health: oklch(0.86 0.14 95);
	--field-active: oklch(0.76 0.13 160);
	--field-ink: var(--color-ink);
	/* Empty / not done yet: diagonal hazard stripes. */
	--field-empty: repeating-linear-gradient(135deg, #2a2a2a 0 3px, var(--color-ink) 3px 11px);

	/* The accent is the Training field — primary actions, focus, selection. */
	--color-accent: var(--field-train);
	--color-accent-ink: var(--color-ink);
	--color-accent-text: var(--color-accent);

	--color-lime: var(--field-active);
	--color-lavender: var(--field-base);
	--color-sky: var(--field-train);
	--color-red: oklch(0.7 0.19 28);
	--color-success: var(--field-active);

	--color-mood-good: var(--field-active);
	--color-mood-bad: oklch(0.7 0.19 28);
	--color-mood-good-text: var(--color-mood-good);
	--color-mood-bad-text: var(--color-mood-bad);

	--color-text-primary: var(--color-paper);
	--color-text-secondary: #bdbab2;
	--color-text-muted: #8e8c86;
	--color-text-tertiary: #8e8c86;

	--font-display: 'Unbounded', sans-serif;
	--font-body: 'JetBrains Mono', monospace;
	--font-mono: 'JetBrains Mono', monospace;

	/* Rules */
	--rule: 3px;
	--rule-thin: 2px;

	/* Square corners everywhere. Kept as tokens so components stay consistent. */
	--radius-sm: 0;
	--radius-md: 0;
	--radius-lg: 0;
	--radius-xl: 0;
	--radius-2xl: 0;
	--radius-tile: 0;
	--radius-sheet: 0;
	--radius-full: 0;

	/* Hard offset shadows. A shadow means "pressable". */
	--press-offset: 6px;
	--shadow-hard: var(--press-offset) var(--press-offset) 0 var(--color-paper);
	--shadow-hard-sm: 4px 4px 0 var(--color-paper);
	--shadow-sm: var(--shadow-hard-sm);
	--shadow-md: var(--shadow-hard);
	--shadow-lg: var(--shadow-hard);
	--shadow-lime: var(--shadow-hard);
	--shadow-lavender: var(--shadow-hard);

	--space-1: 4px;
	--space-2: 8px;
	--space-3: 12px;
	--space-4: 16px;
	--space-5: 20px;
	--space-6: 24px;
	--space-8: 32px;
	--space-10: 40px;
	--space-12: 48px;

	--ease-spring: cubic-bezier(0.2, 0, 0, 1);
	--ease-out: cubic-bezier(0.2, 0, 0, 1);
	--ease-default: cubic-bezier(0.4, 0, 0.2, 1);
	--duration-press: 60ms;
	--duration-fast: 120ms;
	--duration-normal: 200ms;
	--duration-slow: 320ms;

	--safe-top: env(safe-area-inset-top, 0px);
	--safe-bottom: env(safe-area-inset-bottom, 0px);

	--nav-height: 64px;
	--max-width: 460px;
	--side-nav-width: 220px;
	--page-gutter: var(--space-4);

	/* Density defaults (comfortable) */
	--tile-h: 68px;
	--card-gap: 14px;

	--r-tile: var(--radius-tile);
	--r-xl: var(--radius-xl);
	--r-2xl: var(--radius-2xl);
}

/*
 * ── Density (Settings → Personalization, US-046) ──
 * Overrides the base spacing tokens, so every component follows the setting.
 */
[data-density='compact'] {
	--space-1: 3px;
	--space-2: 6px;
	--space-3: 9px;
	--space-4: 12px;
	--space-5: 15px;
	--space-6: 18px;
	--space-8: 24px;
	--space-10: 30px;
	--space-12: 36px;
	--tile-h: 60px;
	--card-gap: 10px;
}

[data-density='spacious'] {
	--space-1: 5px;
	--space-2: 10px;
	--space-3: 15px;
	--space-4: 20px;
	--space-5: 25px;
	--space-6: 30px;
	--space-8: 40px;
	--space-10: 50px;
	--space-12: 60px;
	--tile-h: 78px;
	--card-gap: 18px;
}

/* ============================================================
   Global Reset
   ============================================================ */
*,
*::before,
*::after {
	box-sizing: border-box;
	margin: 0;
	padding: 0;
}

html {
	-webkit-text-size-adjust: 100%;
	text-size-adjust: 100%;
}

body {
	background-color: var(--color-bg);
	background-image:
		linear-gradient(var(--color-grid) 1px, transparent 1px),
		linear-gradient(90deg, var(--color-grid) 1px, transparent 1px);
	background-size: 24px 24px;
	background-attachment: fixed;
	color: var(--color-text-primary);
	font-family: var(--font-body);
	font-size: 15px;
	line-height: 1.5;
	min-height: 100dvh;
	overflow-x: hidden;
	-webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale;
}

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

button {
	font: inherit;
	cursor: pointer;
	border: none;
	background: none;
}

ul,
ol {
	list-style: none;
}

a {
	color: inherit;
	text-decoration: none;
}

/* ============================================================
   Visually hidden (screen-reader only)
   ============================================================ */
.sr-only {
	position: absolute;
	inline-size: 1px;
	block-size: 1px;
	padding: 0;
	margin: -1px;
	overflow: hidden;
	clip: rect(0, 0, 0, 0);
	white-space: nowrap;
	border-width: 0;
}

/* ============================================================
   Focus styles
   ============================================================ */
:focus-visible {
	outline: var(--rule) solid var(--color-accent);
	outline-offset: 3px;
}

/* ============================================================
   App shell
   ============================================================ */
.app {
	container-type: inline-size;
	container-name: app;
	display: flex;
	flex-direction: column;
	min-height: 100dvh;
	position: relative;
}

.app__main {
	container-type: inline-size;
	container-name: main;
	flex: 1;
	inline-size: 100%;
	overflow-x: clip;
	overflow-y: auto;
	padding-block-end: calc(var(--nav-height) + var(--safe-bottom));
	display: flex;
	flex-direction: column;
	align-items: center;
}

/* ============================================================
   Page layout — centered content column
   ============================================================ */
.page {
	container-type: inline-size;
	container-name: page;
	box-sizing: border-box;
	inline-size: min(100%, var(--max-width));
	margin-inline: auto;
	padding-inline-start: max(var(--page-gutter), env(safe-area-inset-left, 0px));
	padding-inline-end: max(var(--page-gutter), env(safe-area-inset-right, 0px));
	padding-block-start: calc(var(--safe-top) + var(--space-6));
	padding-block-end: var(--space-8);
	flex-shrink: 0;
}

.page--wide {
	inline-size: min(100%, 1120px);
}

@container app (inline-size >= 720px) {
	.page,
	.page--wide {
		padding-inline-start: max(var(--space-8), env(safe-area-inset-left, 0px));
		padding-inline-end: max(var(--space-8), env(safe-area-inset-right, 0px));
	}
}

@container app (inline-size >= 720px) {
	.app__main {
		padding-inline-start: var(--side-nav-width);
		padding-block-end: var(--space-8);
	}

	.recovery-banner {
		inset-inline-start: calc(var(--side-nav-width) + var(--space-4));
		inset-block-end: var(--space-4);
	}
}

/* ============================================================
   Loading state
   ============================================================ */
.app-loading {
	display: flex;
	align-items: center;
	justify-content: center;
	min-height: 100dvh;
}

.app-loading__spinner {
	inline-size: 32px;
	block-size: 32px;
	border: var(--rule) solid var(--color-border);
	border-top-color: var(--color-accent);
	animation: spin 700ms linear infinite;
}

.app-error {
	max-inline-size: 22rem;
	padding: var(--space-6);
	text-align: center;
}

.app-error__title {
	font-family: var(--font-display);
	font-weight: 800;
	text-transform: uppercase;
	font-size: 1.125rem;
	margin-block-end: var(--space-2);
}

.app-error__body {
	color: var(--color-text-muted);
	margin-block-end: var(--space-4);
}

.app-error__btn {
	padding: var(--space-2) var(--space-5);
	background: var(--color-accent);
	color: var(--color-accent-ink);
	border: var(--rule) solid var(--color-ink);
	box-shadow: var(--shadow-hard-sm);
	font-family: var(--font-display);
	font-weight: 800;
	text-transform: uppercase;
	cursor: pointer;
}

/* ============================================================
   Recovery banner
   ============================================================ */
.recovery-banner {
	position: fixed;
	inset-inline-start: max(var(--page-gutter), env(safe-area-inset-left, 0px));
	inset-inline-end: max(var(--page-gutter), env(safe-area-inset-right, 0px));
	inset-block-end: calc(var(--nav-height) + var(--safe-bottom) + var(--space-4));
	max-inline-size: var(--max-width);
	margin-inline: auto;
	z-index: 100;
	background: var(--color-ink);
	border: var(--rule) solid var(--color-paper);
	padding: var(--space-4);
	box-shadow: 6px 6px 0 var(--color-accent);
}

.recovery-banner__title {
	font-family: var(--font-display);
	font-weight: 800;
	text-transform: uppercase;
	font-size: 1rem;
	margin-block-end: var(--space-1);
}

.recovery-banner__body {
	font-size: 0.875rem;
	color: var(--color-text-secondary);
	margin-block-end: var(--space-4);
}

.recovery-banner__actions {
	display: flex;
	gap: var(--space-2);
}

.recovery-banner__btn {
	flex: 1;
	padding-block: var(--space-2);
	border: var(--rule) solid var(--color-paper);
	font-family: var(--font-display);
	font-size: 0.8125rem;
	font-weight: 800;
	text-transform: uppercase;
	min-block-size: 48px;
}

.recovery-banner__btn--resume {
	background: var(--color-accent);
	color: var(--color-accent-ink);
	border-color: var(--color-ink);
}

.recovery-banner__btn--discard {
	background: transparent;
	color: var(--color-text-primary);
}

/* ============================================================
   Keyframes
   ============================================================ */
@keyframes spin {
	to {
		transform: rotate(360deg);
	}
}

@keyframes fade-in {
	from {
		opacity: 0;
	}
	to {
		opacity: 1;
	}
}

@keyframes slide-up {
	from {
		opacity: 0;
		transform: translateY(16px);
	}
	to {
		opacity: 1;
		transform: translateY(0);
	}
}

/* ============================================================
   Page transitions (View Transitions API, started in +layout)
   The old page drops away fast; the new one rises in. The nav
   has its own name, so it holds still.
   ============================================================ */
::view-transition-old(root) {
	animation: vt-out 110ms var(--ease-out) both;
}

::view-transition-new(root) {
	animation: vt-in 220ms var(--ease-out) both;
}

@keyframes vt-out {
	to {
		opacity: 0;
		transform: translateY(-8px);
	}
}

@keyframes vt-in {
	from {
		opacity: 0;
		transform: translateY(14px);
	}
}

/* ============================================================
   Reduced motion
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
	*,
	*::before,
	*::after {
		animation-duration: 0.01ms !important;
		animation-iteration-count: 1 !important;
		transition-duration: 0.01ms !important;
	}
}

/* ============================================================
   Charts (TanStack Charts — see src/lib/charts/)
   ============================================================ */
:root {
	--ts-chart-tooltip-background: var(--color-ink);
	--ts-chart-tooltip-color: var(--color-text-primary);
	--ts-chart-tooltip-border: var(--rule-thin) solid var(--color-paper);
	--ts-chart-tooltip-border-radius: 0;
	--ts-chart-tooltip-shadow: var(--shadow-hard-sm);
	--ts-chart-tooltip-font: 500 0.75rem/1.4 var(--font-mono);
}

/* Series key under multi-line charts. Decorative — the tooltip carries the data. */
.chart-legend {
	list-style: none;
	display: flex;
	flex-wrap: wrap;
	gap: var(--space-2) var(--space-4);
	margin-block-start: var(--space-3);
	font-size: 0.6875rem;
	font-weight: 700;
	text-transform: uppercase;
	color: var(--color-text-secondary);
}

.chart-legend li {
	display: inline-flex;
	align-items: center;
	gap: 6px;
}

.chart-legend span {
	inline-size: 10px;
	block-size: 10px;
}

/* Insights card helpers (empty states, footnotes, pickers). */
.insight-empty {
	padding-block: var(--space-6);
	text-align: center;
	font-size: 0.875rem;
	color: var(--color-text-secondary);
}

.insight-note {
	margin-block-start: var(--space-3);
	font-size: 0.75rem;
	line-height: 1.45;
	color: var(--color-text-secondary);
}

.insight-select {
	display: inline-flex;
	align-items: center;
	gap: var(--space-2);
	margin-block-end: var(--space-3);
	font-size: 0.8125rem;
	color: var(--color-text-secondary);
}

.insight-select select {
	max-inline-size: 220px;
	block-size: 34px;
	padding-inline: var(--space-2);
	border: var(--rule-thin) solid var(--color-paper);
	background: var(--color-ink);
	color: var(--color-text-primary);
	font: inherit;
	font-size: 0.8125rem;
}