@import url("https://fonts.googleapis.com/css2?family=Inter:wght@300;400;600;700&display=swap");

:root {
	--bg: #0f1226;
	--bg-accent: #1a1f3d;
	--card: rgba(255, 255, 255, 0.08);
	--card-border: rgba(255, 255, 255, 0.15);
	--text: #e9ecff;
	--muted: #b3b8d6;
	--primary: #6c7cff;
	--primary-strong: #5162ff;
	--success: #22c55e;
	--danger: #ef4444;
	--shadow: 0 20px 50px rgba(10, 13, 35, 0.45);
	--radius: 18px;
}

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

html, body {
	height: 100%;
}

body {
	font-family: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
	color: var(--text);
	background: radial-gradient(1200px 800px at 20% 20%, #28306a 0%, transparent 55%),
				radial-gradient(900px 600px at 80% 0%, #2f3a7b 0%, transparent 50%),
				linear-gradient(160deg, var(--bg) 0%, var(--bg-accent) 100%);
	display: flex;
	flex-direction: column;
	align-items: center;
	padding: 48px 16px 72px;
	gap: 16px;
}

h1 {
	font-size: clamp(2rem, 3vw, 2.8rem);
	font-weight: 700;
	letter-spacing: 0.5px;
	text-shadow: 0 12px 30px rgba(0, 0, 0, 0.4);
}

#task, #btn, #ul {
	width: min(720px, 92vw);
}

#task {
	background: var(--card);
	border: 1px solid var(--card-border);
	border-radius: var(--radius);
	padding: 14px 18px;
	font-size: 1rem;
	color: var(--text);
	outline: none;
	backdrop-filter: blur(14px);
	box-shadow: var(--shadow);
	transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

#task::placeholder {
	color: var(--muted);
}

#task:focus {
	border-color: rgba(108, 124, 255, 0.7);
	box-shadow: 0 0 0 4px rgba(108, 124, 255, 0.2), var(--shadow);
	transform: translateY(-1px);
}

#btn {
	margin-top: 6px;
	padding: 12px 18px;
	border: none;
	border-radius: var(--radius);
	background: linear-gradient(135deg, var(--primary), var(--primary-strong));
	color: #fff;
	font-size: 1rem;
	font-weight: 600;
	cursor: pointer;
	box-shadow: 0 16px 35px rgba(81, 98, 255, 0.35);
	transition: transform 0.15s ease, box-shadow 0.2s ease, filter 0.2s ease;
}

#btn:hover {
	transform: translateY(-2px);
	filter: brightness(1.05);
}

#btn:active {
	transform: translateY(0);
	box-shadow: 0 10px 24px rgba(81, 98, 255, 0.3);
}

#ul {
	list-style: none;
	display: flex;
	flex-direction: column;
	gap: 12px;
	margin-top: 18px;
}

#ul li {
	display: grid;
	grid-template-columns: 1fr auto auto;
	align-items: center;
	gap: 10px;
	background: rgba(15, 18, 38, 0.65);
	border: 1px solid rgba(255, 255, 255, 0.12);
	border-radius: calc(var(--radius) - 6px);
	padding: 14px 16px;
	box-shadow: 0 12px 30px rgba(9, 12, 28, 0.45);
	backdrop-filter: blur(8px);
	word-break: break-word;
}

#ul li button {
	border: none;
	border-radius: 12px;
	padding: 8px 12px;
	font-size: 0.9rem;
	font-weight: 600;
	cursor: pointer;
	transition: transform 0.15s ease, box-shadow 0.2s ease, filter 0.2s ease;
	color: #fff;
}

#ul li button:first-of-type {
	background: linear-gradient(135deg, #16a34a, #22c55e);
	box-shadow: 0 10px 20px rgba(34, 197, 94, 0.25);
}

#ul li button:last-of-type {
	background: linear-gradient(135deg, #dc2626, #ef4444);
	box-shadow: 0 10px 20px rgba(239, 68, 68, 0.25);
}

#ul li button:hover {
	transform: translateY(-1px);
	filter: brightness(1.05);
}

#ul li button:active {
	transform: translateY(0);
}

@media (max-width: 520px) {
	#ul li {
		grid-template-columns: 1fr;
		gap: 8px;
	}

	#ul li button {
		width: 100%;
	}
}