*,
		*::before,
		*::after {
			margin: 0;
			padding: 0;
			box-sizing: border-box;
		}

		:root {
			--bg: #f7f6f3;
			--card: #ffffff;
			--fg: #18181b;
			--muted: #a1a1aa;
			--border: #e4e4e7;
			--border-focus: #71717a;
			--disposable: #dc2626;
			--disposable-bg: #fef2f2;
			--disposable-border: #fecaca;
			--clean: #16a34a;
			--clean-bg: #f0fdf4;
			--clean-border: #bbf7d0;
			--invalid: #b45309;
			--invalid-bg: #fffbeb;
			--invalid-border: #fde68a;
			--serif: "Cormorant Garamond", "Georgia", serif;
			--sans: "Outfit", "Helvetica Neue", sans-serif;
			--radius: 12px;
			--shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
			--shadow-lg: 0 4px 12px rgba(0, 0, 0, 0.08), 0 2px 4px rgba(0, 0, 0, 0.04);
			--content-max: min(92vw, 68rem);
		}

		html {
			font-size: 18px;
		}

		html,
		body {
			height: 100%;
			font-family: var(--sans);
			background: var(--bg);
			color: var(--fg);
			-webkit-font-smoothing: antialiased;
			-moz-osx-font-smoothing: grayscale;
		}

		body {
			display: flex;
			flex-direction: column;
			align-items: center;
			min-height: 100dvh;
			padding: 3rem 2.5rem;
			background-image:
				radial-gradient(ellipse 80% 50% at 50% 0%, rgba(200, 195, 185, 0.15), transparent),
				radial-gradient(ellipse 60% 40% at 80% 100%, rgba(180, 175, 165, 0.08), transparent);
		}

		main {
			width: 100%;
			max-width: var(--content-max);
			margin-top: auto;
			margin-bottom: auto;
			animation: fadeUp 0.6s cubic-bezier(0.22, 1, 0.36, 1) both;
		}

		@keyframes fadeUp {
			from {
				opacity: 0;
				transform: translateY(10px);
			}
			to {
				opacity: 1;
				transform: translateY(0);
			}
		}

		/* ── Header ── */

		.header {
			text-align: center;
			margin-bottom: 2.5rem;
		}

		h1 {
			font-family: var(--serif);
			font-weight: 300;
			font-size: clamp(3.25rem, 6vw, 5rem);
			letter-spacing: -0.03em;
			line-height: 1;
			margin-bottom: 0.4em;
			color: var(--fg);
		}

		.logo {
			width: 88px;
			height: 88px;
			margin-bottom: 1.25rem;
		}

		.tagline {
			font-size: 0.85rem;
			font-weight: 500;
			letter-spacing: 0.2em;
			text-transform: uppercase;
			color: var(--muted);
		}

		/* ── Input ── */

		.input-wrap {
			position: relative;
			margin-bottom: 2rem;
		}

		input {
			display: block;
			width: 100%;
			padding: 1rem 0;
			font-family: var(--sans);
			font-size: 1.5rem;
			font-weight: 400;
			color: var(--fg);
			background: transparent;
			border: none;
			border-bottom: 1px solid var(--border);
			outline: none;
			text-align: center;
			transition:
				border-color 0.25s ease,
				box-shadow 0.25s ease;
			caret-color: var(--fg);
			-webkit-appearance: none;
			appearance: none;
		}

		input::placeholder {
			color: var(--muted);
			font-weight: 300;
		}

		input:focus {
			border-bottom-color: var(--border-focus);
			box-shadow: 0 1px 0 0 var(--border-focus);
		}

		.hint {
			font-size: 0.85rem;
			color: var(--muted);
			text-align: center;
			margin-top: 0.6rem;
			opacity: 0;
			transition: opacity 0.25s ease;
			letter-spacing: 0.04em;
		}

		.input-wrap:focus-within .hint {
			opacity: 1;
		}

		/* ── Result ── */

		.result {
			min-height: 88px;
			display: flex;
			flex-direction: column;
			align-items: center;
			justify-content: center;
		}

		.result-inner {
			opacity: 0;
			transform: translateY(6px);
			transition:
				opacity 0.4s cubic-bezier(0.22, 1, 0.36, 1),
				transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
			pointer-events: none;
			width: 100%;
		}

		.result-inner.visible {
			opacity: 1;
			transform: translateY(0);
			pointer-events: auto;
		}

		.result-pills {
			display: flex;
			justify-content: center;
			align-items: center;
			flex-wrap: wrap;
			gap: 0.6rem;
		}

		.result-pill {
			display: inline-flex;
			align-items: center;
			gap: 0.6rem;
			padding: 0.65rem 1.25rem;
			border-radius: 100px;
			border: 1px solid transparent;
		}

		.result-pill.disposable {
			background: var(--disposable-bg);
			border-color: var(--disposable-border);
			color: var(--disposable);
		}

		.result-pill.clean {
			background: var(--clean-bg);
			border-color: var(--clean-border);
			color: var(--clean);
		}

		.result-pill.invalid {
			background: var(--invalid-bg);
			border-color: var(--invalid-border);
			color: var(--invalid);
		}

		.result-pill-dot {
			width: 6px;
			height: 6px;
			border-radius: 50%;
			background: currentColor;
			flex-shrink: 0;
		}

		.result-verdict {
			font-size: 0.9rem;
			font-weight: 600;
			letter-spacing: 0.1em;
			text-transform: uppercase;
		}

		/* ── Loading ── */

		.loading {
			display: inline-block;
			width: 18px;
			height: 18px;
			border: 2px solid var(--border);
			border-top-color: var(--fg);
			border-radius: 50%;
			animation: spin 0.6s linear infinite;
			opacity: 0;
			transition: opacity 0.2s ease;
		}

		.loading.active {
			opacity: 1;
		}

		@keyframes spin {
			to {
				transform: rotate(360deg);
			}
		}

		/* ── Error ── */

		.result-detail {
			font-size: 0.95rem;
			color: var(--muted);
			margin-top: 0.6rem;
			text-align: center;
		}

		.result-error {
			font-size: 1rem;
			color: var(--disposable);
			font-weight: 400;
			text-align: center;
		}

		/* ── Footer ── */

		footer {
			margin-top: 1.25rem;
			text-align: center;
		}

		footer a {
			font-size: 0.8rem;
			color: var(--muted);
			text-decoration: none;
			letter-spacing: 0.12em;
			text-transform: uppercase;
			transition: color 0.2s ease;
		}

		footer a:hover {
			color: var(--fg);
		}

		.api-section {
			font-size: 1rem;
			line-height: 1.75;
			color: var(--muted);
			text-align: left;
		}

		.api-section strong {
			color: var(--fg);
			font-weight: 500;
		}

		.api-section h3 {
			font-size: 0.85rem;
			font-weight: 600;
			letter-spacing: 0.15em;
			text-transform: uppercase;
			color: var(--fg);
			margin-top: 1.5rem;
			margin-bottom: 0.5rem;
		}

		.api-section h3:first-child {
			margin-top: 0;
		}

		.api-section code {
			font-family: "SF Mono", "Fira Code", "Menlo", monospace;
			font-size: 0.9rem;
			background: rgba(0, 0, 0, 0.04);
			padding: 0.15em 0.4em;
			border-radius: 4px;
			color: var(--fg);
		}

		pre.api-example {
			background: rgba(0, 0, 0, 0.03);
			border: 1px solid var(--border);
			border-radius: 8px;
			padding: 1rem 1.25rem;
			margin-top: 0.5rem;
			margin-bottom: 1rem;
			font-family: "SF Mono", "Fira Code", "Menlo", monospace;
			font-size: 0.875rem;
			line-height: 1.65;
			overflow-x: auto;
			color: var(--fg);
			white-space: pre;
		}

		.api-method {
			display: inline-block;
			font-size: 0.75rem;
			font-weight: 600;
			letter-spacing: 0.08em;
			padding: 0.1em 0.45em;
			border-radius: 3px;
			margin-right: 0.4em;
			vertical-align: middle;
		}

		.api-method.get {
			background: var(--clean-bg);
			color: var(--clean);
		}
		.api-method.post {
			background: var(--invalid-bg);
			color: var(--invalid);
		}

		.api-try {
			display: inline-block;
			margin-top: 0.25rem;
			font-size: 0.85rem;
			color: var(--muted);
			cursor: pointer;
			text-decoration: underline;
			text-decoration-style: dotted;
			text-underline-offset: 2px;
			transition: color 0.2s ease;
		}

		.api-try:hover {
			color: var(--fg);
		}

		.api-section-label {
			font-size: 0.85rem;
			font-weight: 600;
			letter-spacing: 0.18em;
			text-transform: uppercase;
			color: var(--muted);
			text-align: center;
			margin: 2.5rem 0 1.25rem;
			display: flex;
			align-items: center;
			gap: 0.75rem;
		}

		.api-section-label::before,
		.api-section-label::after {
			content: "";
			flex: 1;
			height: 1px;
			background: var(--border);
		}

		/* ── GitHub badge ── */

	.corner-badges {
		position: fixed;
		top: 1.25rem;
		right: 1.25rem;
		display: flex;
		flex-direction: column;
		align-items: flex-end;
		gap: 0.35rem;
		z-index: 10;
	}

	.github-badge {
		display: inline-flex;
		align-items: center;
		gap: 0.5rem;
		padding: 0.5rem 0.9rem;
		border-radius: 100px;
		background: var(--card);
		border: 1px solid var(--border);
		box-shadow: var(--shadow);
		text-decoration: none;
		font-size: 0.8rem;
		font-weight: 500;
		letter-spacing: 0.08em;
		text-transform: uppercase;
		color: var(--muted);
		transition:
			color 0.2s ease,
			border-color 0.2s ease,
			box-shadow 0.2s ease;
	}

	.github-badge:hover {
		color: var(--fg);
		border-color: var(--border-focus);
		box-shadow: var(--shadow-lg);
	}

	.github-badge svg {
		width: 16px;
		height: 16px;
		fill: currentColor;
	}

.result-center {
	text-align: center;
}

/* ── Mobile ── */

@media (max-width: 767px) {
	:root {
		--content-max: 100%;
	}

	html {
		font-size: 16px;
	}

	body {
		padding: 1.25rem;
	}

	.header {
		margin-bottom: 2rem;
	}

	h1 {
		font-size: clamp(2.5rem, 10vw, 3.25rem);
	}

	.logo {
		width: 64px;
		height: 64px;
	}

	.tagline {
		font-size: 0.7rem;
	}

	input {
		font-size: 1.125rem;
		padding: 0.875rem 0;
	}

	.hint {
		font-size: 0.75rem;
	}

	.result {
		min-height: 72px;
	}

	.result-verdict {
		font-size: 0.8rem;
	}

	.result-detail {
		font-size: 0.85rem;
	}

	.api-section {
		font-size: 0.9rem;
	}

	.api-section h3 {
		font-size: 0.75rem;
		margin-top: 1.25rem;
	}

	.api-section code {
		font-size: 0.82rem;
	}

	pre.api-example {
		font-size: 0.78rem;
		padding: 0.75rem 1rem;
	}

	.api-method {
		font-size: 0.7rem;
	}

	.api-try {
		font-size: 0.8rem;
	}

	.api-section-label {
		font-size: 0.75rem;
		margin: 2rem 0 1rem;
	}

	footer a {
		font-size: 0.7rem;
	}

	.github-badge {
		font-size: 0.7rem;
		padding: 0.4rem 0.75rem;
	}
}