/* Reset básico y tipografía */
* {
	box-sizing: border-box;
}

html,
body {
	margin: 0;
	padding: 0;
}

body {
	font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
	background-color: #f3f4f6;
	color: #111827;
}

/* Layout móvil (mobile-first) */
.topbar {
	background-color: #111827;
	color: #f9fafb;
	padding: 10px 16px;
}

.topbar-inner {
	max-width: 420px;
	margin: 0 auto;
	display: flex;
	flex-direction: row;
	align-items: center;
	justify-content: space-between;
	gap: 12px;
}

.brand {
	display: flex;
	align-items: center;
	gap: 8px;
	font-weight: 600;
	font-size: 0.95rem;
}

.brand-icon {
	width: 24px;
	height: 24px;
	border-radius: 6px;
	background-color: #ef4444;
	display: flex;
	align-items: center;
	justify-content: center;
	font-size: 12px;
}

.top-links {
	display: flex;
	gap: 10px;
	font-size: 0.75rem;
	color: #e5e7eb;
}

.top-links span {
	opacity: 0.9;
}

.app-wrapper {
	max-width: 420px;
	margin: 20px auto 24px;
	padding: 0 14px;
}

.card {
	background-color: #ffffff;
	border-radius: 10px;
	border: 1px solid #e5e7eb;
	box-shadow: 0 10px 25px rgba(15, 23, 42, 0.08);
	padding: 18px 16px 20px;
}

h1 {
	margin: 0 0 14px;
	font-size: 1.2rem;
	font-weight: 600;
	text-align: center;
	color: #111827;
}

.input-row {
	display: flex;
	flex-direction: column;
	gap: 8px;
	margin-bottom: 14px;
}

input[type="text"] {
	padding: 10px 12px;
	font-size: 0.9rem;
	border-radius: 6px;
	border: 1px solid #d1d5db;
	outline: none;
	color: #111827;
}

input[type="text"]::placeholder {
	color: #9ca3af;
}

input[type="text"]:focus {
	border-color: #2563eb;
	box-shadow: 0 0 0 1px rgba(37, 99, 235, 0.4);
}

button {
	padding: 10px 12px;
	font-size: 0.9rem;
	cursor: pointer;
	border-radius: 6px;
	border: none;
	background-color: #ef4444;
	color: #f9fafb;
	font-weight: 600;
}

button:hover {
	background-color: #dc2626;
}

button:active {
	background-color: #b91c1c;
}

.info-block {
	margin-top: 6px;
	font-size: 0.85rem;
	line-height: 1.55;
	color: #4b5563;
}

.info-block h2 {
	font-size: 0.95rem;
	margin: 10px 0 6px;
	color: #111827;
}

.info-block p {
	margin: 0 0 8px;
}

.info-block ol {
	margin: 0 0 8px 18px;
	padding: 0;
}

.info-block li {
	margin-bottom: 4px;
}

.qr-section {
	margin-top: 18px;
	padding-top: 14px;
	border-top: 1px solid #e5e7eb;
	text-align: center;
}

#qr-container {
	margin-top: 10px;
	min-height: 180px;
	display: flex;
	align-items: center;
	justify-content: center;
}

#qrImage {
	border-radius: 8px;
	background-color: #ffffff;
	padding: 6px;
	border: 1px solid #e5e7eb;
}

.qr-placeholder {
	color: #9ca3af;
	font-size: 0.8rem;
}

footer {
	max-width: 420px;
	margin: 0 auto 20px;
	padding: 0 16px;
	text-align: center;
	font-size: 0.7rem;
	color: #6b7280;
}

/* Mejora visual en pantallas más grandes (tablets/desktop) */
@media (min-width: 640px) {
	body {
		background-color: #e5e7eb;
	}

	.topbar {
		padding: 12px 0;
	}

	.topbar-inner,
	.app-wrapper,
	footer {
		max-width: 960px;
	}

	.topbar-inner {
		padding: 0 24px;
	}

	.app-wrapper {
		margin-top: 32px;
	}

	.card {
		padding: 22px 26px 24px;
	}

	h1 {
		font-size: 1.4rem;
	}

	.input-row {
		flex-direction: row;
		align-items: stretch;
	}

	.input-row input[type="text"] {
		flex: 1;
		border-radius: 6px 0 0 6px;
		border-right: none;
	}

	.input-row button {
		min-width: 140px;
		border-radius: 0 6px 6px 0;
	}
}

/* Ajustes extra para pantallas muy estrechas (teléfonos pequeños) */
@media (max-width: 360px) {
	.topbar-inner {
		flex-direction: column;
		align-items: flex-start;
	}

	.top-links {
		width: 100%;
		justify-content: flex-start;
		flex-wrap: wrap;
	}

	.top-links span {
		margin-right: 8px;
	}
}