:root {
    /* Color Palette - Blue & Glass theme */
    --clr-primary: #0c2d6b;
    --clr-primary-light: #15408f;
    --clr-accent: #1baaff;
    --clr-bg-main: #ffffff;
    --clr-text: #0f172a;
    --clr-text-muted: #475569;

    /* Panel & UI Colors */
    --clr-panel-bg: rgba(255, 255, 255, 0.86);
    --clr-panel-border: rgba(12, 45, 107, 0.15);
    --clr-shadow: rgba(0, 0, 0, 0.1);

    /* Spacing & Sizing */
    --header-height-full: 22vh;
    --header-height-shrunk: 48px;
    --panel-max-width: 960px;
    --spacing-panel-margin: 4vh;
    --radius-lg: 18px;
    --radius-md: 10px;
    --radius-full: 999px;

    /* Animations */
    --trans-fast: 0.12s ease;
    --trans-med: 0.22s ease;
    --trans-slow: 0.3s ease-in-out;
}

/* Base Styles */
* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
    font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
    color: var(--clr-text);
    background: var(--clr-bg-main);
    /* Remove height: 100% to let min-height on .app work correctly */
}

/* App Skeleton with Fixed Header Support */
.app {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    padding-top: var(--header-height-full);
    overflow-x: hidden;
}

/* Header & Top Bar Navigation */
#topBar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    background: var(--clr-bg-main);
    box-shadow: 0 1px 3px var(--clr-shadow);
    transition: box-shadow var(--trans-slow);
}

.scrolled #topBar {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

header {
    background: var(--clr-bg-main);
    display: grid;
    place-items: center;
    border-bottom: 1px solid #e5e7eb;
    height: 15vh;
    min-height: 48px;
    overflow: visible;
    transition: height var(--trans-slow);
}

.scrolled header {
    height: var(--header-height-shrunk);
}

.brand {
    font-family: Impact, Haettenschweiler, 'Arial Black', sans-serif;
    font-style: italic;
    font-size: clamp(2.25rem, 6vw, 5rem);
    text-align: center;
    transition: font-size var(--trans-slow), -webkit-text-stroke-width var(--trans-slow);

    color: transparent;
    -webkit-text-fill-color: transparent;
    background: linear-gradient(to top, #5fbaff 0%, #ffffff 50%, #ffffff 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-stroke: 0.5px var(--clr-primary);
    filter: drop-shadow(2px 2px 4px rgba(0, 0, 0, 0.4));
    padding-right: 0.15em;
}

.scrolled .brand {
    font-size: 1.5rem;
    -webkit-text-stroke-width: 1px;
}

nav {
    background: linear-gradient(0deg, #f9fafb, #ffffff);
    border-bottom: 1px solid #e5e7eb;
    transition: padding var(--trans-slow);
}

.menu {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    flex-wrap: wrap;
    transition: padding var(--trans-slow);
}

.scrolled .menu {
    padding: 0.4rem 1rem;
}

.menu button {
    border: 1px solid #d0d7e2;
    background: var(--clr-bg-main);
    color: var(--clr-primary);
    font-weight: 600;
    padding: 0.6rem 1rem;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: transform var(--trans-fast), background var(--trans-fast), box-shadow var(--trans-fast);
}

.menu button:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(12, 45, 107, 0.12);
}

.menu button[aria-current="page"] {
    background: var(--clr-primary);
    color: var(--clr-bg-main);
    border-color: var(--clr-primary);
}

/* Better handling for notebook screens (1080p @ 150% = 720p effective) */
@media (max-height: 750px) {
    :root {
        /* Increase padding-top to 220px to accommodate wrapped menus on 720p screens */
        --header-height-full: 220px;
    }

    header {
        height: 100px;
        min-height: 80px;
    }

    .brand {
        font-size: clamp(1.8rem, 4vw, 3rem);
    }

    .app {
        padding-top: var(--header-height-full);
    }
}

/* Background & Main Content Panel */
main {
    position: relative;
    flex: 1;
    overflow: visible;
    background: var(--clr-primary);
    background-image:
        radial-gradient(circle at 20% 10%, rgba(255, 255, 255, 0.06) 0 30%, transparent 30%),
        radial-gradient(circle at 80% 30%, rgba(255, 255, 255, 0.04) 0 28%, transparent 28%),
        radial-gradient(circle at 40% 80%, rgba(255, 255, 255, 0.05) 0 25%, transparent 25%);
    background-blend-mode: overlay;
    isolation: isolate;
}

#golCanvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    opacity: 0.15;
    filter: contrast(1.05) saturate(0.9);
    pointer-events: none;
    will-change: opacity, transform;
    transform: translateZ(0);
}

/* TimelineJS Theme Overrides */
.tl-timeline {
    background: transparent !important;
}

.tl-menubar,
.tl-timenav {
    background-color: var(--clr-bg-main) !important;
}

.tl-marker-active .tl-marker-content {
    background-color: var(--clr-primary) !important;
    border-color: var(--clr-primary) !important;
}

.tl-marker:hover .tl-marker-content {
    background-color: var(--clr-primary) !important;
}

.tl-slidenav-icon,
.tl-slidenav-title {
    color: var(--clr-primary) !important;
}

.tl-headline-date {
    color: var(--clr-primary) !important;
}

.timeline-wrapper {
    width: 100%;
}

#timeline-embed {
    width: 100%;
    height: 600px;
    background: rgba(0, 0, 0, 0.03);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: background var(--trans-slow);
}

.timeline-copyright {
    margin: 0.8rem 0 0 0;
    font-size: 0.65rem;
    color: var(--clr-text-muted);
    text-align: right;
    pointer-events: auto;
}

.panel {
    position: relative;
    z-index: 1;
    max-width: var(--panel-max-width);
    margin: var(--spacing-panel-margin) auto;
    background: var(--clr-panel-bg);
    backdrop-filter: blur(6px);
    border: 1px solid var(--clr-panel-border);
    border-radius: var(--radius-lg);
    padding: clamp(1rem, 2.5vw, 2rem);
    box-shadow: 0 10px 35px rgba(0, 0, 0, 0.18);
    transform: translateY(6px);
    opacity: 0;
    transition: opacity var(--trans-med), transform var(--trans-med);
}

.panel.show {
    opacity: 1;
    transform: translateY(0);
}

/* AI Timeline View Styles */
.view-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.view-header h2 {
    margin: 0;
}

.icon-button {
    background: transparent;
    border: 1px solid var(--clr-panel-border);
    color: var(--clr-primary);
    padding: 0.5rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--trans-fast);
}

.icon-button:hover {
    background: rgba(12, 45, 107, 0.05);
    border-color: var(--clr-primary);
    transform: translateY(-1px);
}

.search-bar {
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: all var(--trans-med);
    margin-bottom: 0;
}

.search-bar.show {
    max-height: 200px;
    opacity: 1;
    margin-bottom: 1.5rem;
}

.search-inner {
    background: rgba(255, 255, 255, 0.4);
    backdrop-filter: blur(10px);
    border: 1px solid var(--clr-panel-border);
    border-radius: var(--radius-md);
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.topic-filter-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    padding: 0.5rem 0;
    justify-content: center;
}

.topic-pill {
    padding: 0.4rem 0.8rem;
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--trans-fast);
    border: 1px solid transparent;
    user-select: none;
    text-transform: lowercase;
}

.topic-pill:hover {
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* Event Card Topic Labels */
.tl-text {
    position: relative !important;
    vertical-align: top !important;
    padding-top: 1rem !important; /* Spacing at top */
}

/* Allow the text content to be full width so labels can hit the right edge */
.tl-text .tl-text-content {
    max-width: none !important;
    padding: 0 !important;
}

/* Constrain only the actual readable content for better UX */
.tl-text .tl-headline {
    max-width: 650px !important;
    margin-left: 0 !important;
    margin-right: auto !important;
    text-align: left !important;
}

.tl-text .tl-text-content p,
.tl-text .tl-text-content ul,
.tl-text .tl-text-content ol {
    max-width: 650px !important;
    margin-left: 0 !important;
    margin-right: auto !important;
}

/* Fix caption overflow and ensure it wraps within media area */
.tl-media .tl-caption {
    max-width: 450px !important;
    white-space: normal !important;
    margin-left: 0 !important;
    margin-right: auto !important;
    text-align: left !important;
    overflow-wrap: break-word !important;
}

/* Base style for labels, we'll move them in the DOM via JS */
.topic-labels-container {
    position: absolute; /* Relative to text area initially */
    top: 0;
    right: 0;
    display: flex;
    justify-content: flex-end;
    gap: 0.4rem;
    z-index: 1000;
    pointer-events: none;
    opacity: 0; /* Hidden until relocated by JS to avoid jitter */
    transition: opacity 0.3s ease;
}

/* When labels are moved to be child of .tl-slide in JS */
.tl-slide > .topic-labels-container {
    position: sticky;
    top: 1.5rem;
    z-index: 1000;
    display: flex;
    justify-content: flex-end;
    width: auto;
    height: 0; /* Don't take up vertical space */
    overflow: visible; /* Allow pills to be seen */
    margin: 0;
    padding-right: 1rem; /* Moved closer to the right edge */
    pointer-events: none; /* Allow interaction with text behind */
}

.event-topic-label {
    pointer-events: auto; /* Ensure pills are still clickable */
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: lowercase;
    color: white;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* Purchase links cart icon */
.purchase-links-container {
    position: absolute;
    top: 0;
    right: 0;
    z-index: 1001;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.tl-slide > .purchase-links-container {
    position: sticky;
    top: 3.5rem;
    height: 0;
    overflow: visible;
    display: flex;
    justify-content: flex-end;
    padding-right: 1rem;
    pointer-events: none;
}

.cart-btn {
    pointer-events: auto;
    position: relative;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--clr-accent);
    border: none;
    border-radius: 4px;
    cursor: pointer;
    color: #fff;
    box-shadow: 0 2px 6px rgba(27, 170, 255, 0.45);
    padding: 0;
    transition: background 0.15s ease, box-shadow 0.15s ease;
}

.cart-btn:hover {
    background: var(--clr-primary);
    box-shadow: 0 2px 8px rgba(12, 45, 107, 0.45);
}

.purchase-dropdown {
    pointer-events: auto;
    display: none;
    position: absolute;
    top: calc(100% + 4px);
    right: 0;
    background: #fff;
    border: 1px solid var(--clr-panel-border);
    border-radius: 6px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    min-width: 180px;
    z-index: 1100;
    overflow: hidden;
}

.purchase-dropdown.open {
    display: block;
}

.purchase-link,
.purchase-link:link,
.purchase-link:visited {
    display: block;
    padding: 0.5rem 0.85rem;
    font-size: 0.8rem;
    color: var(--clr-primary) !important;
    font-weight: 500;
    text-decoration: none !important;
    white-space: nowrap;
    border-left: 3px solid transparent;
    transition: border-color 0.1s ease, background 0.1s ease;
}

.purchase-link:hover {
    background: rgba(27, 170, 255, 0.08);
    border-left-color: var(--clr-accent);
    color: var(--clr-primary) !important;
}

@media (min-width: 640px) {
    .search-inner {
        flex-direction: row;
        align-items: center;
    }
}

#search-input {
    flex: 1;
    background: rgba(255, 255, 255, 0.8);
    border: 1px solid var(--clr-panel-border);
    border-radius: 8px;
    padding: 0.6rem 1rem;
    font-size: 1rem;
    color: var(--clr-text);
    outline: none;
    transition: border-color var(--trans-fast), box-shadow var(--trans-fast);
}

#search-input:focus {
    border-color: var(--clr-accent);
    box-shadow: 0 0 0 3px rgba(27, 170, 255, 0.15);
}

.search-actions {
    display: flex;
    gap: 0.5rem;
}

.btn-primary,
.btn-secondary {
    padding: 0.6rem 1.2rem;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--trans-fast);
    font-size: 0.9rem;
}

.btn-primary {
    background: var(--clr-primary);
    color: white;
    border: 1px solid var(--clr-primary);
}

.btn-primary:hover:not(:disabled) {
    background: var(--clr-primary-light);
    transform: translateY(-1px);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    filter: grayscale(0.5);
}

.btn-secondary {
    background: transparent;
    color: var(--clr-text-muted);
    border: 1px solid #d0d7e2;
}

.btn-secondary:hover {
    background: #f1f5f9;
    color: var(--clr-text);
}

/* Seven-segment Display Stats */
#statsPanel {
    position: fixed;
    right: 0.75rem;
    bottom: 0.75rem;
    z-index: 101;
    /* Slightly higher than topBar if they overlap, though they shouldn't */
    display: grid;
    gap: 0.25rem;
    background: rgba(0, 0, 0, 0.35);
    /* Slightly darker for better contrast over scrolling content */
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: var(--radius-md);
    padding: 0.45rem 0.5rem;
    box-shadow: 0 8px 18px rgba(0, 0, 0, 0.25);
    backdrop-filter: blur(3px);
    -webkit-backdrop-filter: blur(3px);
    color: #e5ecff;
    transform: scale(0.525);
    transform-origin: bottom right;
}

#statsPanel .row {
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

#statsPanel .label {
    font-size: 0.62rem;
    letter-spacing: 0.12em;
    opacity: 0.95;
    min-width: 3.4rem;
}

#statsPanel .digits {
    display: flex;
    gap: 0.12rem;
    align-items: center;
}

#statsPanel .percent {
    margin-left: 0.15rem;
    opacity: 0.95;
    font-size: 0.75rem;
}

.seg {
    fill: rgba(255, 255, 255, 0.05);
    stroke: rgba(255, 255, 255, 0.08);
    stroke-width: 1;
}

.seg.on {
    fill: #cfe3ff;
    filter: drop-shadow(0 0 1px rgba(207, 227, 255, 0.5));
}

ol li {
    font-size: 0.70rem;
    line-height: 1.5;
}

.spinner-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 200px;
    gap: 1.5rem;
}

.spinner {
    width: 48px;
    height: 48px;
    border: 3px solid rgba(27, 170, 255, 0.2);
    border-radius: 50%;
    border-top-color: var(--clr-accent);
    animation: spin 0.8s linear infinite;
}

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

.loading-text {
    font-size: 0.9rem;
    color: var(--clr-accent);
    font-weight: 500;
    letter-spacing: 0.05em;
    text-align: center;
}

/* Force branded loading text style with high specificity */
#timeline-embed .spinner-container .loading-text,
.spinner-container .loading-text {
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif !important;
    font-size: 0.95rem !important;
    color: var(--clr-accent) !important;
    font-weight: 600 !important;
    letter-spacing: 0.05em !important;
    text-align: center !important;
    margin: 0 !important;
    display: block !important;
}

/* Ensure spinner is always visible and colored correctly */
#timeline-embed .spinner-container .spinner,
.spinner-container .spinner {
    display: block !important;
    width: 48px !important;
    height: 48px !important;
    border: 3px solid rgba(27, 170, 255, 0.2) !important;
    border-top-color: var(--clr-accent) !important;
    border-radius: 50% !important;
    animation: spin 0.8s linear infinite !important;
}

/* Hide TimelineJS default loader when our branded loader is present */
.spinner-container+.tl-timeline .tl-loader,
#timeline-embed:has(.spinner-container) .tl-loader,
#timeline-embed .tl-loader {
    display: none !important;
    opacity: 0 !important;
    visibility: hidden !important;
    pointer-events: none !important;
}