/* Words Per Minute Calculator — frontend styles
   Design: carbon/ink base with a typewriter-ribbon amber accent.
   Display type: 'Space Grotesk' (UI chrome) + monospace (typed content). */

.wpm-calc {
	--wpm-bg: #15171c;
	--wpm-surface: #1e212b;
	--wpm-surface-raised: #262a37;
	--wpm-ink: #f1ede4;
	--wpm-muted: #6b7280;
	--wpm-muted-2: #4b5160;
	--wpm-accent: #f2b705;
	--wpm-correct: #4fd1a5;
	--wpm-error: #ff6b6b;
	--wpm-border: #2f3341;
	--wpm-radius: 10px;
	--wpm-font-ui: 'Space Grotesk', 'Segoe UI', system-ui, -apple-system, sans-serif;
	--wpm-font-mono: 'JetBrains Mono', 'IBM Plex Mono', 'SFMono-Regular', Menlo, Consolas, monospace;

	box-sizing: border-box;
	background: var(--wpm-bg);
	color: var(--wpm-ink);
	border-radius: 16px;
	padding: 28px;
	max-width: 900px;
	margin: 24px auto;
	font-family: var(--wpm-font-ui);
	position: relative;
	box-shadow: 0 1px 0 rgba(255,255,255,0.04) inset, 0 20px 40px rgba(0,0,0,0.25);
}

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

/* ---------- Toolbar ---------- */

.wpm-toolbar {
	display: flex;
	align-items: center;
	flex-wrap: wrap;
	gap: 10px;
	background: var(--wpm-surface);
	border: 1px solid var(--wpm-border);
	border-radius: var(--wpm-radius);
	padding: 10px 14px;
	margin-bottom: 18px;
}

.wpm-toolbar-group {
	display: flex;
	align-items: center;
	gap: 6px;
	flex-wrap: wrap;
}

.wpm-toolbar-divider {
	width: 1px;
	align-self: stretch;
	background: var(--wpm-border);
	margin: 2px 4px;
}

.wpm-pill {
	font-family: var(--wpm-font-ui);
	font-size: 13px;
	font-weight: 600;
	letter-spacing: 0.02em;
	color: var(--wpm-muted);
	background: transparent;
	border: 1px solid transparent;
	border-radius: 999px;
	padding: 6px 14px;
	cursor: pointer;
	transition: color .15s ease, background .15s ease, border-color .15s ease;
}

.wpm-pill:hover {
	color: var(--wpm-ink);
}

.wpm-pill.is-active {
	color: #1a1a1a;
	background: var(--wpm-accent);
	border-color: var(--wpm-accent);
}

/* "Keycap" style buttons for time / word-count values — a nod to physical keys */
.wpm-key {
	font-family: var(--wpm-font-mono);
	font-size: 13px;
	font-weight: 600;
	color: var(--wpm-muted);
	background: var(--wpm-surface-raised);
	border: 1px solid var(--wpm-border);
	border-bottom-width: 3px;
	border-radius: 6px;
	min-width: 40px;
	padding: 6px 10px;
	cursor: pointer;
	transition: transform .08s ease, color .15s ease, border-color .15s ease, background .15s ease;
}

.wpm-key:hover {
	color: var(--wpm-ink);
}

.wpm-key:active {
	transform: translateY(2px);
	border-bottom-width: 1px;
}

.wpm-key.is-active {
	color: #1a1a1a;
	background: var(--wpm-accent);
	border-color: var(--wpm-accent);
}

.wpm-select-label {
	font-size: 12px;
	color: var(--wpm-muted);
	margin-right: 4px;
}

.wpm-select {
	font-family: var(--wpm-font-ui);
	font-size: 13px;
	color: var(--wpm-ink);
	background: var(--wpm-surface-raised);
	border: 1px solid var(--wpm-border);
	border-radius: 6px;
	padding: 6px 10px;
}

/* ---------- Live stats ---------- */

.wpm-stats-bar {
	display: flex;
	gap: 28px;
	flex-wrap: wrap;
	margin-bottom: 18px;
	padding: 0 4px;
}

.wpm-stat {
	display: flex;
	flex-direction: column;
	line-height: 1;
}

.wpm-stat-value {
	font-family: var(--wpm-font-mono);
	font-variant-numeric: tabular-nums;
	font-size: 34px;
	font-weight: 700;
	color: var(--wpm-accent);
}

.wpm-stat-label {
	font-size: 11px;
	text-transform: uppercase;
	letter-spacing: 0.08em;
	color: var(--wpm-muted);
	margin-top: 4px;
}

.wpm-stat-best {
	margin-left: auto;
}

.wpm-stat-best .wpm-stat-value {
	color: var(--wpm-ink);
	font-size: 22px;
}

/* ---------- Typing area ---------- */

.wpm-type-area {
	position: relative;
	background: var(--wpm-surface);
	border: 1px solid var(--wpm-border);
	border-radius: var(--wpm-radius);
	padding: 26px 28px;
	min-height: 140px;
	cursor: text;
	outline: none;
}

.wpm-type-area:focus-visible {
	border-color: var(--wpm-accent);
}

.wpm-words {
	font-family: var(--wpm-font-mono);
	font-size: 22px;
	line-height: 1.9;
	letter-spacing: 0.01em;
	max-height: 4.5em;
	overflow: hidden;
	user-select: none;
}

.wpm-word {
	display: inline-block;
	margin: 0 10px 0 0;
	white-space: nowrap;
}

.wpm-letter {
	color: var(--wpm-muted);
	position: relative;
}

.wpm-letter.is-correct {
	color: var(--wpm-ink);
}

.wpm-letter.is-incorrect {
	color: var(--wpm-error);
	text-decoration: underline;
	text-decoration-color: var(--wpm-error);
}

.wpm-letter.is-extra {
	color: var(--wpm-error);
	opacity: 0.7;
}

.wpm-word.is-current .wpm-letter.is-current::before {
	content: '';
	position: absolute;
	left: -1px;
	top: 0;
	bottom: 0;
	width: 2px;
	background: var(--wpm-accent);
	animation: wpm-blink 1s steps(1) infinite;
}

.wpm-word.is-current.wpm-caret-end .wpm-letter:last-child::after {
	content: '';
	position: absolute;
	right: -3px;
	top: 0;
	bottom: 0;
	width: 2px;
	background: var(--wpm-accent);
	animation: wpm-blink 1s steps(1) infinite;
}

@keyframes wpm-blink {
	0%, 100% { opacity: 1; }
	50% { opacity: 0; }
}

.wpm-hidden-input {
	position: absolute;
	opacity: 0;
	pointer-events: none;
	width: 1px;
	height: 1px;
}

.wpm-focus-overlay {
	position: absolute;
	inset: 0;
	display: flex;
	align-items: center;
	justify-content: center;
	background: rgba(21, 23, 28, 0.82);
	border-radius: var(--wpm-radius);
	font-family: var(--wpm-font-ui);
	font-size: 14px;
	color: var(--wpm-muted);
	backdrop-filter: blur(2px);
	transition: opacity .15s ease;
	z-index: 2;
}

.wpm-focus-overlay[hidden] {
	display: none;
}

/* ---------- Controls ---------- */

.wpm-controls {
	display: flex;
	justify-content: center;
	gap: 10px;
	margin-top: 18px;
}

.wpm-btn {
	font-family: var(--wpm-font-ui);
	font-size: 13px;
	font-weight: 600;
	color: var(--wpm-ink);
	background: var(--wpm-surface-raised);
	border: 1px solid var(--wpm-border);
	border-radius: 8px;
	padding: 9px 16px;
	cursor: pointer;
	transition: border-color .15s ease, color .15s ease;
}

.wpm-btn:hover {
	border-color: var(--wpm-accent);
	color: var(--wpm-accent);
}

.wpm-btn-primary {
	background: var(--wpm-accent);
	color: #1a1a1a;
	border-color: var(--wpm-accent);
}

.wpm-btn-primary:hover {
	color: #1a1a1a;
	opacity: 0.9;
}

/* ---------- Results ---------- */

.wpm-results {
	margin-top: 22px;
	background: var(--wpm-surface);
	border: 1px solid var(--wpm-border);
	border-radius: var(--wpm-radius);
	padding: 22px 26px;
}

.wpm-results[hidden] {
	display: none;
}

.wpm-results-title {
	font-family: var(--wpm-font-ui);
	font-size: 13px;
	text-transform: uppercase;
	letter-spacing: 0.1em;
	color: var(--wpm-muted);
	margin: 0 0 16px;
	font-weight: 600;
}

.wpm-results-grid {
	display: grid;
	grid-template-columns: repeat(4, 1fr);
	gap: 18px 12px;
}

.wpm-result-cell {
	display: flex;
	flex-direction: column;
}

.wpm-result-hero .wpm-result-value {
	color: var(--wpm-accent);
	font-size: 30px;
}

.wpm-result-value {
	font-family: var(--wpm-font-mono);
	font-variant-numeric: tabular-nums;
	font-size: 22px;
	font-weight: 700;
	color: var(--wpm-ink);
}

.wpm-result-label {
	font-size: 10.5px;
	text-transform: uppercase;
	letter-spacing: 0.06em;
	color: var(--wpm-muted);
	margin-top: 4px;
}

.wpm-new-best {
	margin-top: 16px;
	font-family: var(--wpm-font-ui);
	font-weight: 700;
	font-size: 13px;
	color: var(--wpm-correct);
	text-align: center;
}

.wpm-new-best[hidden] {
	display: none;
}

/* ---------- Responsive ---------- */

@media (max-width: 640px) {
	.wpm-calc {
		padding: 18px;
		border-radius: 12px;
		margin: 12px auto;
	}
	.wpm-words {
		font-size: 18px;
		max-height: 6.5em;
	}
	.wpm-stat-value {
		font-size: 26px;
	}
	.wpm-stats-bar {
		gap: 18px;
	}
	.wpm-results-grid {
		grid-template-columns: repeat(2, 1fr);
	}
	.wpm-stat-best {
		margin-left: 0;
	}
}

@media (prefers-reduced-motion: reduce) {
	.wpm-word.is-current .wpm-letter.is-current::before,
	.wpm-word.is-current.wpm-caret-end .wpm-letter:last-child::after {
		animation: none;
	}
}