/* BoatLink - boat telemetry UI for boatlink.kybetube.com
   Loaded after variables.css / global.css / components.css: re-tints the shared
   design tokens to a marine palette, then adds the boat-specific components. */

:root {
	/* Marine palette - deep water navy with a channel-marker cyan accent */
	--color-primary: #0ea5e9;
	--color-primary-hover: #0284c7;

	--bg-primary: #071620;
	--bg-secondary: #0d2430;
	--bg-tertiary: #163444;
	--bg-card: #0d2430;

	--text-primary: #eef7fb;
	--text-secondary: #9db6c4;
	--text-muted: #6b8798;

	--border-color: #1c4053;
	--border-focus: #0ea5e9;

	/* Status colours, shared by badges, dots and alert rows */
	--status-online: #10b981;
	--status-late: #f59e0b;
	--status-silent: #ef4444;
	--status-unknown: #6b8798;
}

body {
	background-image:
		radial-gradient(1100px 500px at 15% -10%, rgba(14, 165, 233, 0.10), transparent 60%),
		radial-gradient(900px 500px at 100% 0%, rgba(16, 185, 129, 0.06), transparent 55%);
	background-attachment: fixed;
}

/* ============ SHELL ============ */

.sidebar.collapsed .sidebar-header::before {
	content: '⚓';
}

.bl-logo {
	display: flex;
	align-items: center;
	gap: var(--spacing-sm);
	font-size: var(--font-size-xl);
	font-weight: 700;
	color: var(--text-primary);
	text-decoration: none;
	letter-spacing: -0.02em;
}

.bl-logo:hover {
	color: var(--text-primary);
}

.bl-logo-mark {
	width: 28px;
	height: 28px;
	flex-shrink: 0;
	color: var(--color-primary);
}

.bl-logo-accent {
	color: var(--color-primary);
}

.bl-logo-sub {
	display: block;
	margin-top: 2px;
	font-size: 0.7rem;
	font-weight: 500;
	letter-spacing: 0.14em;
	text-transform: uppercase;
	color: var(--text-muted);
}

.sidebar.collapsed .bl-logo-sub {
	display: none;
}

/* Nav badge for the open-alert count */
.nav-item-badge {
	margin-left: auto;
	min-width: 20px;
	padding: 0 6px;
	border-radius: var(--radius-full);
	background: var(--color-danger);
	color: #fff;
	font-size: 0.7rem;
	font-weight: 700;
	line-height: 18px;
	text-align: center;
}

.nav-item-badge:empty,
.nav-item-badge[data-count="0"] {
	display: none;
}

.sidebar.collapsed .nav-item-badge {
	display: none;
}

/* ============ PAGE TRANSITIONS (shared with the kybetube user SPA) ============ */

.content-container {
	transition: opacity 150ms ease;
}

.content-container.fade-out { opacity: 0; }
.content-container.fade-in { opacity: 1; }

.page-loading {
	display: flex;
	align-items: center;
	justify-content: center;
	min-height: 40vh;
}

.spinner {
	width: 32px;
	height: 32px;
	border: 3px solid var(--border-color);
	border-top-color: var(--color-primary);
	border-radius: 50%;
	animation: bl-spin 0.8s linear infinite;
}

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

/* ============ STATUS ============ */

.bl-status {
	display: inline-flex;
	align-items: center;
	gap: 6px;
	padding: 3px 10px 3px 8px;
	border-radius: var(--radius-full);
	font-size: var(--font-size-sm);
	font-weight: 600;
	white-space: nowrap;
}

.bl-dot {
	width: 8px;
	height: 8px;
	border-radius: 50%;
	flex-shrink: 0;
	background: var(--status-unknown);
}

.bl-status-online { background: rgba(16, 185, 129, 0.12); color: var(--status-online); }
.bl-status-online .bl-dot {
	background: var(--status-online);
	box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.6);
	animation: bl-pulse 2.4s ease-out infinite;
}

.bl-status-late { background: rgba(245, 158, 11, 0.12); color: var(--status-late); }
.bl-status-late .bl-dot { background: var(--status-late); }

.bl-status-silent { background: rgba(239, 68, 68, 0.12); color: var(--status-silent); }
.bl-status-silent .bl-dot { background: var(--status-silent); }

.bl-status-no-data,
.bl-status-no-devices { background: rgba(107, 135, 152, 0.14); color: var(--status-unknown); }

@keyframes bl-pulse {
	0%   { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.5); }
	70%  { box-shadow: 0 0 0 7px rgba(16, 185, 129, 0); }
	100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

@media (prefers-reduced-motion: reduce) {
	.bl-status-online .bl-dot { animation: none; }
	.spinner { animation-duration: 2s; }
	.content-container { transition: none; }
}

/* ============ FLEET ============ */

.bl-fleet-grid {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(330px, 1fr));
	gap: var(--spacing-lg);
}

.bl-boat-card {
	display: block;
	background: var(--bg-card);
	border: 1px solid var(--border-color);
	border-radius: var(--radius-lg);
	padding: var(--spacing-lg);
	color: inherit;
	text-decoration: none;
	position: relative;
	overflow: hidden;
	transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.bl-boat-card::before {
	content: '';
	position: absolute;
	inset: 0 auto 0 0;
	width: 3px;
	background: var(--status-unknown);
}

.bl-boat-card[data-status="online"]::before { background: var(--status-online); }
.bl-boat-card[data-status="late"]::before   { background: var(--status-late); }
.bl-boat-card[data-status="silent"]::before { background: var(--status-silent); }

.bl-boat-card:hover {
	transform: translateY(-2px);
	border-color: var(--color-primary);
	box-shadow: 0 12px 28px rgba(0, 0, 0, 0.35);
	color: inherit;
}

.bl-boat-card-head {
	display: flex;
	align-items: flex-start;
	justify-content: space-between;
	gap: var(--spacing-sm);
	margin-bottom: var(--spacing-xs);
}

.bl-boat-name {
	font-size: var(--font-size-lg);
	font-weight: 600;
	color: var(--text-primary);
}

.bl-boat-harbour {
	display: flex;
	align-items: center;
	gap: 5px;
	font-size: var(--font-size-sm);
	color: var(--text-muted);
	margin-bottom: var(--spacing-md);
}

.bl-boat-harbour svg {
	width: 14px;
	height: 14px;
	flex-shrink: 0;
}

/* Headline metric row on a fleet card */
.bl-metrics {
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	gap: var(--spacing-sm);
	padding: var(--spacing-md) 0;
	border-top: 1px solid var(--border-color);
	border-bottom: 1px solid var(--border-color);
	margin-bottom: var(--spacing-md);
}

.bl-metric-label {
	display: block;
	font-size: 0.7rem;
	letter-spacing: 0.08em;
	text-transform: uppercase;
	color: var(--text-muted);
	margin-bottom: 2px;
}

.bl-metric-value {
	font-size: var(--font-size-xl);
	font-weight: 600;
	color: var(--text-primary);
	font-variant-numeric: tabular-nums;
	line-height: 1.2;
}

.bl-metric-unit {
	font-size: var(--font-size-sm);
	font-weight: 500;
	color: var(--text-secondary);
	margin-left: 1px;
}

.bl-metric-value.is-cold  { color: #60a5fa; }
.bl-metric-value.is-alarm { color: var(--color-danger); }
.bl-metric-value.is-warn  { color: var(--color-warning); }
.bl-metric-value.is-empty { color: var(--text-muted); font-size: var(--font-size-lg); }

.bl-boat-foot {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: var(--spacing-sm);
	font-size: var(--font-size-sm);
	color: var(--text-muted);
}

/* ============ ALERTS ============ */

.bl-alert-list {
	display: flex;
	flex-direction: column;
	gap: var(--spacing-sm);
}

.bl-alert {
	display: flex;
	align-items: flex-start;
	gap: var(--spacing-md);
	padding: var(--spacing-md);
	border-radius: var(--radius-md);
	border: 1px solid var(--border-color);
	background: var(--bg-secondary);
	border-left-width: 3px;
}

.bl-alert-critical { border-left-color: var(--color-danger); }
.bl-alert-warning  { border-left-color: var(--color-warning); }
.bl-alert-info     { border-left-color: var(--text-muted); }

.bl-alert-icon {
	width: 20px;
	height: 20px;
	flex-shrink: 0;
	margin-top: 2px;
}

.bl-alert-critical .bl-alert-icon { color: var(--color-danger); }
.bl-alert-warning .bl-alert-icon  { color: var(--color-warning); }
.bl-alert-info .bl-alert-icon     { color: var(--text-muted); }

.bl-alert-body { flex: 1; min-width: 0; }

.bl-alert-title {
	font-weight: 600;
	color: var(--text-primary);
	margin-bottom: 2px;
}

.bl-alert-detail {
	font-size: var(--font-size-sm);
	color: var(--text-secondary);
	overflow-wrap: anywhere;
}

.bl-alert-boat {
	font-size: var(--font-size-sm);
	color: var(--color-primary);
	white-space: nowrap;
	text-decoration: none;
}

/* Compact banner used at the top of a boat page */
.bl-alert-strip {
	display: flex;
	flex-wrap: wrap;
	gap: var(--spacing-sm);
	margin-bottom: var(--spacing-lg);
}

/* ============ BOAT DETAIL ============ */

.bl-boat-header {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: var(--spacing-md);
	margin-bottom: var(--spacing-xl);
}

.bl-back {
	display: inline-flex;
	align-items: center;
	gap: 4px;
	font-size: var(--font-size-sm);
	color: var(--text-secondary);
	text-decoration: none;
	margin-bottom: var(--spacing-sm);
}

.bl-back:hover { color: var(--color-primary); }

.bl-back svg { width: 16px; height: 16px; }

.bl-compartment {
	margin-bottom: var(--spacing-xl);
}

.bl-compartment-head {
	display: flex;
	align-items: baseline;
	gap: var(--spacing-sm);
	margin-bottom: var(--spacing-md);
	padding-bottom: var(--spacing-sm);
	border-bottom: 1px solid var(--border-color);
}

.bl-compartment-name {
	font-size: var(--font-size-lg);
	font-weight: 600;
	color: var(--text-primary);
}

.bl-compartment-meta {
	font-size: var(--font-size-sm);
	color: var(--text-muted);
}

.bl-sensor-grid {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
	gap: var(--spacing-md);
}

.bl-sensor-card {
	background: var(--bg-card);
	border: 1px solid var(--border-color);
	border-radius: var(--radius-lg);
	padding: var(--spacing-md);
}

.bl-sensor-head {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: var(--spacing-sm);
	margin-bottom: var(--spacing-md);
}

.bl-sensor-name {
	font-weight: 600;
	color: var(--text-primary);
	overflow: hidden;
	text-overflow: ellipsis;
	white-space: nowrap;
}

.bl-reading-row {
	display: flex;
	align-items: baseline;
	justify-content: space-between;
	gap: var(--spacing-sm);
	padding: 6px 0;
}

.bl-reading-row + .bl-reading-row {
	border-top: 1px solid rgba(255, 255, 255, 0.04);
}

.bl-reading-name {
	display: flex;
	align-items: center;
	gap: 6px;
	font-size: var(--font-size-sm);
	color: var(--text-secondary);
}

.bl-reading-name svg {
	width: 14px;
	height: 14px;
	opacity: 0.7;
	flex-shrink: 0;
}

.bl-reading-value {
	font-weight: 600;
	color: var(--text-primary);
	font-variant-numeric: tabular-nums;
}

.bl-sensor-foot {
	margin-top: var(--spacing-sm);
	padding-top: var(--spacing-sm);
	border-top: 1px solid var(--border-color);
	font-size: var(--font-size-sm);
	color: var(--text-muted);
}

/* Battery strength bar */
.bl-batt {
	display: inline-flex;
	align-items: center;
	gap: 6px;
}

.bl-batt-track {
	width: 34px;
	height: 6px;
	border-radius: var(--radius-full);
	background: var(--bg-tertiary);
	overflow: hidden;
}

.bl-batt-fill {
	height: 100%;
	border-radius: var(--radius-full);
	background: var(--status-online);
	transition: width var(--transition-base);
}

.bl-batt-fill.is-low  { background: var(--color-danger); }
.bl-batt-fill.is-warn { background: var(--color-warning); }

/* ============ CHART ============ */

.bl-chart-toolbar {
	display: flex;
	flex-wrap: wrap;
	gap: var(--spacing-sm);
	align-items: center;
}

.bl-range-group {
	display: inline-flex;
	background: var(--bg-tertiary);
	border-radius: var(--radius-md);
	padding: 2px;
	gap: 2px;
}

.bl-range-btn {
	padding: 4px 12px;
	border: none;
	background: transparent;
	color: var(--text-secondary);
	border-radius: var(--radius-sm);
	font-size: var(--font-size-sm);
	font-weight: 500;
	transition: all var(--transition-fast);
}

.bl-range-btn:hover { color: var(--text-primary); }

.bl-range-btn.active {
	background: var(--color-primary);
	color: #fff;
}

.form-select,
.form-select-sm {
	padding: var(--spacing-xs) var(--spacing-sm);
	background-color: var(--bg-tertiary);
	border: 1px solid var(--border-color);
	border-radius: var(--radius-md);
	color: var(--text-primary);
}

.form-select:focus {
	outline: none;
	border-color: var(--border-focus);
}

.bl-chart-container {
	position: relative;
	height: 340px;
}

/* ============ EMPTY STATES ============ */

.empty-state {
	text-align: center;
	padding: var(--spacing-2xl) var(--spacing-lg);
	color: var(--text-secondary);
}

.empty-state svg {
	width: 48px;
	height: 48px;
	color: var(--text-muted);
	opacity: 0.5;
	margin-bottom: var(--spacing-md);
}

.empty-state h3 {
	font-size: var(--font-size-lg);
	color: var(--text-primary);
	margin-bottom: var(--spacing-xs);
	font-weight: 600;
}

.empty-state p {
	max-width: 46ch;
	margin: 0 auto;
	font-size: var(--font-size-sm);
}

/* ============ SETTINGS ============ */

.bl-settings-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
	gap: var(--spacing-lg);
	align-items: start;
}

/* ============ RESPONSIVE ============ */

@media (max-width: 768px) {
	.sidebar {
		width: 60px;
	}

	.sidebar .bl-logo span,
	.sidebar .nav-item span,
	.sidebar .nav-section-title,
	.sidebar .sidebar-user-info,
	.sidebar .sidebar-logout span {
		display: none;
	}

	.sidebar .nav-item { justify-content: center; }

	.main-content {
		margin-left: 60px;
		padding: var(--spacing-md);
	}

	.bl-fleet-grid,
	.bl-sensor-grid {
		grid-template-columns: 1fr;
	}

	.bl-chart-container { height: 260px; }
}