/* ==========================================================================
   Footer — Radio Anar
   Signature: pulsing "on air" indicator + signal bars (footer-identity)
   Direction : fanzine radio pirate — papier, scotch, cadran de fréquence
   (cohérent avec article.css / header.css)
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Space+Mono:wght@400;700&display=swap');

:root {
	--footer-bg: #ede6d6;
	--footer-bg-raised: #e3dac4;
	--footer-text: #191712;
	--footer-muted: #5b5648;
	--footer-accent: #e8432c;
	--footer-tape: #d9b23c;
	--footer-line: rgba(25, 23, 18, 0.16);

	--footer-font-display: "Space Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;
	--footer-font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}

.footer {
	background: var(--footer-bg);
	color: var(--footer-text);
	border-top: 3px solid var(--footer-text);
	font-family: var(--footer-font-body);
}

/* Filet façon cadran de fréquence, cohérent avec header/article */
.footer::before {
	content: "";
	display: block;
	height: 4px;
	background-image: repeating-linear-gradient(
		90deg,
		var(--footer-text) 0,
		var(--footer-text) 2px,
		transparent 2px,
		transparent 10px
	);
	opacity: 0.25;
}

.footer-container {
	max-width: 1180px;
	margin: 0 auto;
	padding: 56px 24px 32px;
	display: grid;
	grid-template-columns: 1.4fr 1fr 1fr 1.4fr;
	gap: 40px;
}

.footer-block {
	min-width: 0;
}

.footer-title {
	font-family: var(--footer-font-display);
	font-weight: 700;
	font-size: 11px;
	letter-spacing: 0.12em;
	text-transform: uppercase;
	color: var(--footer-muted);
	margin: 0 0 16px;
}

/* ---- Identité / signature ------------------------------------------- */

.footer-identity {
	display: flex;
	flex-direction: column;
	gap: 12px;
}

.footer-logo {
	height: 36px;
	width: auto;
	display: block;
}

.footer-sitename {
	font-family: var(--footer-font-display);
	font-weight: 700;
	font-size: 18px;
	letter-spacing: 0.04em;
	text-transform: uppercase;
	margin: 0;
}

.footer-onair {
	display: flex;
	align-items: center;
	gap: 10px;
	margin: 4px 0 0;
	color: var(--footer-muted);
	font-family: var(--footer-font-display);
	font-size: 11px;
	letter-spacing: 0.04em;
}

.onair-dot {
	width: 7px;
	height: 7px;
	border-radius: 50%;
	background: var(--footer-accent);
	box-shadow: 0 0 0 0 rgba(232, 67, 44, 0.6);
	animation: onair-pulse 2.4s ease-out infinite;
	flex-shrink: 0;
}

.footer-bars {
	display: inline-flex;
	align-items: flex-end;
	gap: 2px;
	height: 12px;
}

.footer-bars span {
	width: 2px;
	background: var(--footer-accent);
	display: inline-block;
	border-radius: 1px;
	animation: signal-bar 1.6s ease-in-out infinite;
}

.footer-bars span:nth-child(1) { height: 30%; animation-delay: -1.1s; }
.footer-bars span:nth-child(2) { height: 70%; animation-delay: -0.7s; }
.footer-bars span:nth-child(3) { height: 100%; animation-delay: -1.4s; }
.footer-bars span:nth-child(4) { height: 50%; animation-delay: -0.3s; }
.footer-bars span:nth-child(5) { height: 80%; animation-delay: -0.9s; }

@keyframes onair-pulse {
	0% { box-shadow: 0 0 0 0 rgba(232, 67, 44, 0.55); }
	70% { box-shadow: 0 0 0 6px rgba(232, 67, 44, 0); }
	100% { box-shadow: 0 0 0 0 rgba(232, 67, 44, 0); }
}

@keyframes signal-bar {
	0%, 100% { transform: scaleY(0.4); }
	50% { transform: scaleY(1); }
}

/* ---- Navigation ------------------------------------------------------ */

.footer-nav {
	list-style: none;
	margin: 0;
	padding: 0;
	display: flex;
	flex-direction: column;
	gap: 10px;
}

.footer-nav a {
	font-family: var(--footer-font-display);
	font-weight: 700;
	font-size: 13px;
	color: var(--footer-text);
	text-decoration: none;
	border-bottom: 1px solid transparent;
	transition: border-color 0.15s ease, color 0.15s ease;
}

.footer-nav a:hover {
	color: var(--footer-accent);
	border-color: var(--footer-accent);
}

/* ---- Réseaux sociaux --------------------------------------------------- */

.footer-social {
	list-style: none;
	margin: 0;
	padding: 0;
	display: flex;
	gap: 10px;
}

.footer-social a {
	display: flex;
	align-items: center;
	justify-content: center;
	width: 34px;
	height: 34px;
	border-radius: 50%;
	background: var(--footer-bg-raised);
	border: 1px solid var(--footer-text);
	transition: background 0.15s ease, border-color 0.15s ease, transform 0.15s ease;
}

.footer-social img {
	width: 16px;
	height: 16px;
	object-fit: contain;
	filter: brightness(0); /* icônes en noir sur fond clair */
	transition: filter 0.15s ease;
}

.footer-social a:hover {
	background: var(--footer-accent);
	border-color: var(--footer-accent);
	transform: translateY(-2px);
}

.footer-social a:hover img {
	filter: brightness(0) invert(1); /* icône en blanc au survol, sur fond rouge */
}

/* ---- Texte libre ------------------------------------------------------ */

.footer-free-text {
	font-size: 13.5px;
	line-height: 1.6;
	color: var(--footer-muted);
	margin-bottom: 16px;
}

.footer-free-text p {
	margin: 0 0 10px;
}

.footer-cc-logo {
	height: 28px;
	width: auto;
	margin-top: 4px;
	opacity: 0.85;
	transition: opacity 0.15s ease;
}

.footer-cc-logo:hover {
	opacity: 1;
}

.footer-copyright {
	font-size: 11px;
	color: var(--footer-muted);
	margin: 0;
	padding-top: 16px;
	border-top: 1px solid var(--footer-line);
}

/* ---- Accessibilité ----------------------------------------------------- */

.footer a:focus-visible,
.footer-social a:focus-visible {
	outline: 2px solid var(--footer-accent);
	outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
	.onair-dot,
	.footer-bars span {
		animation: none;
	}
}

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

@media (max-width: 900px) {
	.footer-container {
		grid-template-columns: 1fr 1fr;
		gap: 32px;
	}
}

@media (max-width: 560px) {
	.footer-container {
		grid-template-columns: 1fr;
		padding: 40px 20px 28px;
		gap: 28px;
	}

	.footer-copyright {
		margin-top: 4px;
	}
}