/* 
   Halcyon HUD Theme System
   ------------------------
   Sleek Dark Mode, Deep Ocean Accents, and Rich Glassmorphic Styling
*/

:root {
    --bg-dark: #070a13;
    --bg-panel: #0d1222;
    --bg-card: rgba(16, 23, 41, 0.55);
    --border-glass: rgba(255, 255, 255, 0.06);
    --border-accent: rgba(0, 242, 254, 0.15);
    
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    --accent-blue: #00f2fe;
    --accent-teal: #00dfa2;
    --accent-orange: #ff7e47;
    --accent-purple: #a855f7;
    --accent-red: #ff4d4d;
    
    --sidebar-width: 280px;
    --font-outfit: 'Outfit', sans-serif;
    --font-mono: 'Space Mono', monospace;
    --shadow-glow: 0 8px 32px 0 rgba(0, 242, 254, 0.05);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: var(--font-outfit);
    overflow: hidden;
    height: 100vh;
}

/* App Container Layout */
.app-container {
    display: flex;
    width: 100vw;
    height: 100vh;
}

/* Sidebar Styling */
.sidebar {
    width: var(--sidebar-width);
    background-color: #0b0f1d;
    border-right: 1px solid var(--border-glass);
    display: flex;
    flex-direction: column;
    padding: 24px 20px;
    justify-content: space-between;
    position: relative;
    transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1), padding 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 12px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border-glass);
}

.logo-icon {
    font-size: 28px;
    color: var(--accent-blue);
    text-shadow: 0 0 10px rgba(0, 242, 254, 0.5);
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-text .brand {
    font-weight: 700;
    font-size: 18px;
    letter-spacing: 1.5px;
}

.logo-text .product {
    font-size: 11px;
    color: var(--accent-teal);
    letter-spacing: 1px;
    font-weight: 500;
}

.nav-menu {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 32px;
    flex-grow: 1;
}

.nav-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    padding: 14px 16px;
    border-radius: 12px;
    text-align: left;
    font-family: var(--font-outfit);
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: all 0.25s ease;
}

.nav-btn i {
    width: 20px;
    font-size: 16px;
}

.nav-btn:hover {
    background-color: rgba(255, 255, 255, 0.03);
    color: var(--text-primary);
}

.nav-btn.active {
    background: linear-gradient(135deg, rgba(0, 242, 254, 0.1), rgba(0, 223, 162, 0.03));
    border-left: 3px solid var(--accent-blue);
    color: var(--accent-blue);
    padding-left: 13px; /* account for border */
    font-weight: 600;
}

.sidebar-footer {
    border-top: 1px solid var(--border-glass);
    padding-top: 20px;
    font-size: 12px;
    color: var(--text-secondary);
}

.connection-status {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 6px;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.status-dot.online {
    background-color: var(--accent-teal);
    box-shadow: 0 0 8px var(--accent-teal);
}

.serial-no {
    font-family: var(--font-mono);
    color: var(--text-muted);
}

/* Main Content Area */
.main-content {
    flex-grow: 1;
    background: radial-gradient(circle at 50% 0%, #10182b, var(--bg-dark));
    display: flex;
    flex-direction: column;
    padding: 30px;
    overflow-y: auto;
}

.top-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.top-header h1 {
    font-size: 28px;
    font-weight: 600;
    letter-spacing: -0.5px;
}

/* Button Styling */
.btn {
    padding: 10px 18px;
    border-radius: 10px;
    border: none;
    font-family: var(--font-outfit);
    font-weight: 500;
    font-size: 14px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: all 0.2s ease;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-blue), #00b0ff);
    color: #040814;
    font-weight: 600;
    box-shadow: 0 4px 15px rgba(0, 242, 254, 0.2);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(0, 242, 254, 0.35);
}

.btn-success {
    background: var(--accent-teal);
    color: #040814;
    font-weight: 600;
}

.btn-secondary {
    background-color: rgba(255, 255, 255, 0.06);
    color: var(--text-primary);
    border: 1px solid var(--border-glass);
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

/* Glassmorphism Cards */
.card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: 16px;
    padding: 24px;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: var(--shadow-glow);
}

.glass-card {
    border: 1px solid var(--border-accent);
}

.inner-card {
    background-color: rgba(6, 10, 18, 0.35);
    border: 1px solid var(--border-glass);
}

/* Alerts Banner styling */
.alerts-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 20px;
}

.alert {
    padding: 14px 20px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 14px;
    font-weight: 500;
    animation: fadeIn 0.3s ease;
}

.alert-warning {
    background-color: rgba(255, 126, 71, 0.12);
    border: 1px solid rgba(255, 126, 71, 0.3);
    color: var(--accent-orange);
}

.alert-danger {
    background-color: rgba(255, 77, 77, 0.12);
    border: 1px solid rgba(255, 77, 77, 0.3);
    color: var(--accent-red);
}

/* Stats Dashboard Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 24px;
}

.stat-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: 16px;
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.bg-blue { background-color: rgba(0, 242, 254, 0.12); color: var(--accent-blue); }
.bg-teal { background-color: rgba(0, 223, 162, 0.12); color: var(--accent-teal); }
.bg-orange { background-color: rgba(255, 126, 71, 0.12); color: var(--accent-orange); }
.bg-purple { background-color: rgba(168, 85, 247, 0.12); color: var(--accent-purple); }

.stat-info {
    display: flex;
    flex-direction: column;
}

.stat-label {
    font-size: 13px;
    color: var(--text-secondary);
}

.stat-value {
    font-size: 22px;
    font-weight: 700;
    font-family: var(--font-mono);
}

/* Dashboard Layout split */
.dashboard-layout {
    display: grid;
    grid-template-columns: 1.6fr 1fr;
    gap: 20px;
    height: calc(100% - 150px);
}

/* Section views display toggle */
.view-panel {
    display: none;
    height: 100%;
}

.view-panel.active {
    display: block;
}

/* Data Tables */
.table-wrapper {
    overflow-y: auto;
    max-height: 400px;
    margin-top: 16px;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 14px;
}

.data-table th, .data-table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-glass);
}

.data-table th {
    color: var(--text-secondary);
    font-weight: 500;
}

.data-table tbody tr:hover {
    background-color: rgba(255, 255, 255, 0.02);
}

.badge {
    padding: 4px 8px;
    border-radius: 6px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
}

.badge-info { background-color: rgba(0, 242, 254, 0.1); color: var(--accent-blue); }
.badge-success { background-color: rgba(0, 223, 162, 0.1); color: var(--accent-teal); }
.badge-warning { background-color: rgba(255, 126, 71, 0.1); color: var(--accent-orange); }

/* Stacked Cell List Status on Dashboard */
.cells-status-stack {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-top: 20px;
}

.cell-status-item {
    padding: 16px;
    border-radius: 12px;
    border: 1px solid var(--border-glass);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.cell-meta-side {
    display: flex;
    align-items: center;
    gap: 12px;
}

.cell-port-num {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background-color: rgba(255, 255, 255, 0.05);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-weight: 700;
}

.cell-spec {
    display: flex;
    flex-direction: column;
}

.cell-spec .serial {
    font-family: var(--font-mono);
    font-size: 14px;
    font-weight: 500;
}

.cell-spec .exp-days {
    font-size: 11px;
    color: var(--text-secondary);
}

.cell-badge-val {
    display: flex;
    align-items: center;
    gap: 12px;
}

.days-left-text {
    font-size: 14px;
    font-weight: 600;
    font-family: var(--font-mono);
}

.color-teal { color: var(--accent-teal); }
.color-orange { color: var(--accent-orange); }
.color-red { color: var(--accent-red); }

/* Dive Logs View Split-Layout */
.dive-log-layout {
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: 24px;
    align-items: start;
}

.dive-sidebar-card {
    display: flex;
    flex-direction: column;
    position: sticky;
    top: 100px;
    height: calc(100vh - 140px);
    padding: 16px;
}

.dive-sidebar-search {
    position: relative;
    margin-bottom: 16px;
}

.dive-sidebar-search i {
    position: absolute;
    left: 12px;
    top: 13px;
    color: var(--text-muted);
}

.dive-sidebar-search input {
    width: 100%;
    background-color: rgba(6, 10, 18, 0.5);
    border: 1px solid var(--border-glass);
    border-radius: 10px;
    padding: 11px 12px 11px 36px;
    color: var(--text-primary);
    font-family: var(--font-outfit);
    font-size: 14px;
}

.dive-sidebar-search input:focus {
    outline: none;
    border-color: var(--accent-blue);
}

.dive-sidebar-list {
    flex-grow: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.dive-item-btn {
    width: 100%;
    background: none;
    border: 1px solid transparent;
    color: var(--text-primary); /* explicit bright silver/white */
    text-align: left;
    padding: 12px 14px;
    border-radius: 10px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.2s ease;
}

.dive-item-btn:hover {
    background-color: rgba(255, 255, 255, 0.02);
    border-color: var(--border-glass);
}

.dive-item-btn.active {
    background-color: rgba(0, 242, 254, 0.06);
    border-color: rgba(0, 242, 254, 0.2);
}

.dive-item-main {
    display: flex;
    flex-direction: column;
}

.dive-item-num {
    font-weight: 600;
    font-size: 14px;
    color: #e2e8f0; /* Silver */
}

.dive-item-date {
    font-size: 11px;
    color: var(--text-secondary);
}

.dive-item-badge {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 4px;
}

.dive-item-badge .depth {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 12px;
    color: #cbd5e1; /* Silver */
}

/* Profile Detail Right Panel */
.dive-detail-main {
    height: auto;
    overflow: visible;
}

.dive-detail-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    border-bottom: 1px solid var(--border-glass);
    padding-bottom: 16px;
    margin-bottom: 20px;
}

.dive-detail-header .meta-block {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 4px;
    font-size: 13px;
    color: var(--text-secondary);
    font-family: var(--font-mono);
}

.dive-detail-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.dive-mini-stat {
    padding: 12px;
    border-radius: 10px;
    border: 1px solid var(--border-glass);
    display: flex;
    flex-direction: column;
    align-items: center;
    background-color: rgba(255, 255, 255, 0.01);
}

.dive-mini-stat .val {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 16px;
}

.dive-mini-stat .lbl {
    font-size: 11px;
    color: var(--text-secondary);
    margin-top: 4px;
}

.chart-container {
    position: relative;
    height: 280px;
    width: 100%;
    margin-bottom: 20px;
}

.chart-container-half {
    position: relative;
    height: 180px;
    width: 100%;
}

.rebreather-profile-addon {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
    margin-top: 24px;
}

.rebreather-profile-addon h3 {
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 12px;
    color: var(--text-secondary);
}

/* Cell Management View Grid */
.cells-detail-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 24px;
}

.cell-card {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.cell-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-glass);
    padding-bottom: 12px;
}

.cell-card-header h3 {
    font-size: 18px;
    font-weight: 600;
}

.cell-stat-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    flex-grow: 1;
}

.cell-stat-row {
    display: flex;
    justify-content: space-between;
    font-size: 14px;
}

.cell-stat-row span:first-child {
    color: var(--text-secondary);
}

.cell-stat-row span:last-child {
    font-family: var(--font-mono);
    font-weight: 500;
}

/* Linearity section Layout */
.linearity-columns {
    display: grid;
    grid-template-columns: 1.6fr 1fr;
    gap: 20px;
    margin-top: 20px;
}

.linearity-visual {
    position: relative;
    height: 320px;
    border: 1px solid var(--border-glass);
    border-radius: 12px;
    padding: 16px;
    background-color: rgba(255, 255, 255, 0.01);
}

.section-explanation {
    font-size: 13.5px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-top: 8px;
}

.linearity-stats-card {
    padding: 20px;
}

.card-header-with-action {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Linearity Coefficients styling */
.coef-stack {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 16px;
}

.coef-item {
    padding: 12px;
    border-radius: 8px;
    background-color: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-glass);
}

.coef-header {
    display: flex;
    justify-content: space-between;
    font-weight: 600;
    font-size: 13px;
    margin-bottom: 6px;
}

.coef-desc {
    font-size: 11px;
    color: var(--text-secondary);
}

.placeholder-text {
    color: var(--text-muted);
    font-size: 13.5px;
    text-align: center;
    padding: 40px 0;
}

/* Blackbox Markdown report */
.markdown-body {
    line-height: 1.7;
    font-size: 14px;
    color: var(--text-primary);
    max-height: 550px;
    overflow-y: auto;
    padding-top: 16px;
    font-family: var(--font-outfit);
}

.markdown-body h1, .markdown-body h2, .markdown-body h3 {
    margin-top: 24px;
    margin-bottom: 12px;
    font-weight: 600;
}

.markdown-body h2 {
    font-size: 18px;
    border-bottom: 1px solid var(--border-glass);
    padding-bottom: 6px;
}

.markdown-body p {
    margin-bottom: 14px;
    color: var(--text-secondary);
}

.markdown-body blockquote {
    background-color: rgba(0, 242, 254, 0.04);
    border-left: 3px solid var(--accent-blue);
    padding: 12px 16px;
    border-radius: 0 10px 10px 0;
    margin: 16px 0;
}

.markdown-body blockquote p {
    margin-bottom: 0;
    color: var(--text-primary);
    font-style: italic;
}

.markdown-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 16px 0;
}

.markdown-body th, .markdown-body td {
    padding: 8px 12px;
    border: 1px solid var(--border-glass);
}

.markdown-body th {
    background-color: rgba(255, 255, 255, 0.02);
    color: var(--text-secondary);
}

/* Modals */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(4, 7, 15, 0.7);
    backdrop-filter: blur(10px);
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    width: 500px;
    padding: 30px;
    animation: slideUp 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.glass-modal {
    background-color: #0d1326;
    border: 1px solid var(--border-accent);
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.modal-header h2 {
    font-size: 20px;
    font-weight: 600;
}

.close-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 24px;
    cursor: pointer;
}

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

/* Forms */
.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 16px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-group label {
    font-size: 12.5px;
    color: var(--text-secondary);
    font-weight: 500;
}

.form-group input, .form-group textarea {
    background-color: rgba(4, 7, 15, 0.6);
    border: 1px solid var(--border-glass);
    border-radius: 8px;
    padding: 10px 12px;
    color: var(--text-primary);
    font-family: var(--font-outfit);
    font-size: 14px;
}

.form-group input:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--accent-blue);
    box-shadow: 0 0 8px rgba(0, 242, 254, 0.15);
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    margin-top: 24px;
}

/* Keyframes */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from { transform: translateY(30px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

/* Custom Leaflet Map Dark Theme Overrides */
.leaflet-container {
    background-color: #0b0f19 !important;
}

.leaflet-popup-content-wrapper {
    background: rgba(13, 19, 38, 0.85) !important;
    backdrop-filter: blur(10px) !important;
    border: 1px solid var(--border-glass) !important;
    color: var(--text-primary) !important;
    border-radius: 12px !important;
    font-family: var(--font-outfit) !important;
    box-shadow: 0 10px 25px rgba(0,0,0,0.5) !important;
}

.leaflet-popup-tip {
    background: rgba(13, 19, 38, 0.85) !important;
    border: 1px solid var(--border-glass) !important;
}

.leaflet-bar {
    border: 1px solid var(--border-glass) !important;
    background: rgba(13, 19, 38, 0.8) !important;
    backdrop-filter: blur(10px) !important;
    border-radius: 8px !important;
    overflow: hidden !important;
    box-shadow: none !important;
}

.leaflet-bar a {
    background: transparent !important;
    color: var(--text-primary) !important;
    border-bottom: 1px solid var(--border-glass) !important;
    transition: all 0.2s ease !important;
}

.leaflet-bar a:hover {
    background-color: rgba(255, 255, 255, 0.05) !important;
}

/* Custom markers animations and hover scaling */
.custom-marker-start, .custom-marker-end {
    transition: transform 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.custom-marker-start:hover, .custom-marker-end:hover {
    transform: scale(1.3) !important;
}

/* Slider Custom Styling */
#speed-slider {
    -webkit-appearance: none;
    appearance: none;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
    outline: none;
    cursor: pointer;
    transition: background 0.3s ease;
}

#speed-slider::-webkit-slider-thumb {
    height: 12px;
    width: 12px;
    border-radius: 50%;
    background: var(--accent-blue);
    cursor: pointer;
    -webkit-appearance: none;
    margin-top: -4px;
    box-shadow: 0 0 6px rgba(0, 242, 254, 0.6);
    transition: transform 0.1s ease;
}

#speed-slider::-webkit-slider-thumb:hover {
    transform: scale(1.25);
}

/* Telemetry Selector Dropdown Styles */
.profile-chart-header {
    margin-bottom: 12px;
}

.telemetry-selector-container {
    position: relative;
    user-select: none;
}

.telemetry-dropdown-btn {
    transition: background 0.2s ease, border-color 0.2s ease;
}

.telemetry-dropdown-btn:hover {
    background: rgba(255, 255, 255, 0.08) !important;
    border-color: rgba(255, 255, 255, 0.2) !important;
}

.telemetry-dropdown-menu {
    display: none;
    position: absolute;
    right: 0;
    top: calc(100% + 6px);
    background: #0f172a;
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 8px;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.5);
    z-index: 50;
    padding: 8px;
    min-width: 230px;
    max-height: 320px;
    overflow-y: auto;
    backdrop-filter: blur(16px);
}

.telemetry-dropdown-menu::-webkit-scrollbar {
    width: 6px;
}

.telemetry-dropdown-menu::-webkit-scrollbar-track {
    background: transparent;
}

.telemetry-dropdown-menu::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}

.telemetry-dropdown-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 8px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 11.5px;
    color: var(--text-secondary);
    transition: background 0.15s ease, color 0.15s ease;
}

.telemetry-dropdown-item:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
}

.telemetry-dropdown-item input[type="checkbox"] {
    accent-color: var(--accent-blue);
    cursor: pointer;
    width: 14px;
    height: 14px;
}

.telemetry-color-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
}

/* Elevate parent stacking contexts when a chart goes fullscreen */
.main-content:has(.chart-container-fullscreen),
.view-panel:has(.chart-container-fullscreen),
.card:has(.chart-container-fullscreen),
.rebreather-profile-addon:has(.chart-container-fullscreen),
.dive-log-layout:has(.chart-container-fullscreen) {
    z-index: 99999 !important;
    transform: none !important;
    filter: none !important;
}

/* Chart Fullscreen Pop-out Overlay */
.chart-container-fullscreen {
    position: fixed !important;
    top: 0; left: 0;
    width: 100vw !important;
    height: 100vh !important;
    z-index: 9999;
    background: #0f172a;
    border-radius: 0 !important;
    padding: 40px !important;
    display: flex;
    flex-direction: column;
}
.chart-container-fullscreen canvas {
    height: 75vh !important;
}

.chart-expand-btn {
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 0.65;
}
.chart-expand-btn:hover {
    opacity: 1;
    transform: scale(1.15);
    color: var(--accent-teal) !important;
}

.chart-container-fullscreen .chart-expand-btn {
    position: absolute !important;
    top: 24px !important;
    right: 24px !important;
    z-index: 100000 !important;
    font-size: 16px !important;
    color: #ffffff !important;
    background: rgba(255, 255, 255, 0.08) !important;
    border: 1px solid rgba(255, 255, 255, 0.15) !important;
    border-radius: 50% !important;
    width: 42px !important;
    height: 42px !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    cursor: pointer !important;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.5) !important;
    backdrop-filter: blur(8px) !important;
    -webkit-backdrop-filter: blur(8px) !important;
    opacity: 1 !important;
    margin: 0 !important;
}

/* Collapsible Sidebar System */
.app-container {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Sidebar Toggle Floating Button */
.sidebar-toggle-btn {
    position: absolute;
    top: 30px;
    right: -13px; /* perfectly centered on the right border line */
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background-color: #0b0f1d;
    border: 1px solid var(--border-glass);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 1000;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.4);
}

.sidebar-toggle-btn:hover {
    background-color: var(--accent-blue);
    color: #070a13;
    border-color: var(--accent-blue);
    transform: scale(1.15);
}

.sidebar-toggle-btn i {
    font-size: 11px;
    transition: transform 0.3s ease;
}

/* Collapsed State Redefinitions */
.sidebar-collapsed {
    --sidebar-width: 76px !important;
}

.sidebar-collapsed .sidebar {
    padding: 24px 12px;
}

/* Logo Area Transitions */
.logo-text {
    transition: opacity 0.25s ease, width 0.25s ease, margin 0.25s ease;
    opacity: 1;
    width: auto;
    overflow: hidden;
}

.sidebar-collapsed .logo-area {
    justify-content: center;
    gap: 0;
}

.sidebar-collapsed .logo-text {
    opacity: 0;
    width: 0;
    margin: 0;
    pointer-events: none;
}

/* Nav Link Span Transitions */
.nav-btn {
    transition: padding 0.3s ease, justify-content 0.3s ease, gap 0.3s ease;
}

.nav-btn span {
    transition: opacity 0.2s ease, width 0.2s ease, margin 0.2s ease;
    opacity: 1;
    white-space: nowrap;
}

.sidebar-collapsed .nav-btn {
    justify-content: center;
    padding: 14px 0;
    gap: 0;
}

.sidebar-collapsed .nav-btn span {
    opacity: 0;
    width: 0;
    overflow: hidden;
    margin: 0;
    pointer-events: none;
}

.sidebar-collapsed .nav-btn i {
    font-size: 17px; /* slightly larger in collapsed mode for beautiful icon alignment */
    width: auto;
    margin: 0;
}

/* Footer Retraction */
.sidebar-footer {
    transition: padding 0.3s ease;
}

.sidebar-footer span:not(.status-dot),
.sidebar-footer .serial-no {
    transition: opacity 0.2s ease, height 0.2s ease, margin 0.2s ease;
    opacity: 1;
}

.sidebar-collapsed .sidebar-footer {
    padding-top: 16px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.sidebar-collapsed .connection-status {
    margin-bottom: 0;
    justify-content: center;
}

.sidebar-collapsed .sidebar-footer span:not(.status-dot),
.sidebar-collapsed .sidebar-footer .serial-no {
    opacity: 0;
    width: 0;
    height: 0;
    overflow: hidden;
    margin: 0;
    pointer-events: none;
    display: none;
}

/* Rotate Toggle Arrow in Collapsed Mode */
.sidebar-collapsed .sidebar-toggle-btn i {
    transform: rotate(180deg);
}