* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    width: 100%;
    height: 100%;
    overflow: hidden;
}

body {
    background-color: #F7F6F3;
    color: #3A3A3C;
    font-family: 'IBM Plex Sans', sans-serif;
    font-weight: 400;
    line-height: 1.6;
}

/* Timeline Container */
.timeline-container {
    width: 100%;
    height: 100%;
    overflow-x: auto;
    overflow-y: hidden;
    scroll-snap-type: x mandatory;
    scroll-behavior: smooth;
}

.timeline-container::-webkit-scrollbar {
    height: 4px;
}

.timeline-container::-webkit-scrollbar-track {
    background: #F7F6F3;
}

.timeline-container::-webkit-scrollbar-thumb {
    background: #C8CCD0;
    border-radius: 2px;
}

/* Year Track */
.year-track {
    display: flex;
    width: 1200vw;
    height: 100%;
}

/* Month Panel */
.month-panel {
    width: 100vw;
    height: 100vh;
    position: relative;
    scroll-snap-align: start;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #F7F6F3;
    overflow: hidden;
}

.month-panel::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--month-tint);
    pointer-events: none;
    z-index: 0;
}

/* Set tint for each month based on color */
.month-panel[data-color="#5B7B8A"]::before { background-color: rgba(91, 123, 138, 0.06); }
.month-panel[data-color="#8B7DAF"]::before { background-color: rgba(139, 125, 175, 0.06); }
.month-panel[data-color="#6BA368"]::before { background-color: rgba(107, 163, 104, 0.06); }
.month-panel[data-color="#D4A843"]::before { background-color: rgba(212, 168, 67, 0.06); }
.month-panel[data-color="#D47B8A"]::before { background-color: rgba(212, 123, 138, 0.06); }
.month-panel[data-color="#E8963A"]::before { background-color: rgba(232, 150, 58, 0.06); }
.month-panel[data-color="#E06B54"]::before { background-color: rgba(224, 107, 84, 0.06); }
.month-panel[data-color="#C85A3A"]::before { background-color: rgba(200, 90, 58, 0.06); }
.month-panel[data-color="#A07840"]::before { background-color: rgba(160, 120, 64, 0.06); }
.month-panel[data-color="#B85C3A"]::before { background-color: rgba(184, 92, 58, 0.06); }
.month-panel[data-color="#8A6878"]::before { background-color: rgba(138, 104, 120, 0.06); }
.month-panel[data-color="#3A4A6B"]::before { background-color: rgba(58, 74, 107, 0.06); }

/* Seasonal Overlays with SVG patterns */
.seasonal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    opacity: 0.04;
    pointer-events: none;
    z-index: 1;
    background-size: 20px 20px;
    background-repeat: repeat;
}

/* Winter pattern - dot grid */
.winter-overlay {
    background-image: radial-gradient(circle, #2C2C2E 1px, transparent 1px);
    background-size: 20px 20px;
}

/* Spring pattern - diagonal crosshatch */
.spring-overlay {
    background-image:
        linear-gradient(45deg, #2C2C2E 1px, transparent 1px),
        linear-gradient(-45deg, #2C2C2E 1px, transparent 1px);
    background-size: 14px 14px;
    background-position: 0 0, 7px 7px;
}

/* Summer pattern - horizontal waves */
.summer-overlay {
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="100" height="8"><path d="M0,4 Q25,0 50,4 T100,4" stroke="%232C2C2E" stroke-width="1" fill="none"/></svg>');
    background-size: 100px 8px;
    background-repeat: repeat;
}

/* Autumn pattern - scattered circles */
.autumn-overlay {
    background-image:
        radial-gradient(circle, #2C2C2E 2px, transparent 2px),
        radial-gradient(circle, #2C2C2E 3px, transparent 3px),
        radial-gradient(circle, #2C2C2E 2.5px, transparent 2.5px),
        radial-gradient(circle, #2C2C2E 1.5px, transparent 1.5px);
    background-size:
        50px 40px,
        80px 60px,
        45px 55px,
        60px 45px;
    background-position:
        0 0,
        10px 20px,
        20px 10px,
        30px 30px;
}

/* Month Upper */
.month-upper {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 48%;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    padding: 4rem 4rem;
    z-index: 10;
}

/* Month Name */
.month-name {
    font-family: 'Exo 2', sans-serif;
    font-size: clamp(3rem, 8vw, 7rem);
    font-weight: 700;
    margin-bottom: 2rem;
    color: inherit;
    line-height: 1;
    opacity: 0;
    transform: translateY(12px);
}

.month-panel.visible .month-name {
    animation: fadeInUp 400ms cubic-bezier(0.25, 0.1, 0.25, 1) forwards;
}

/* Calendar Grid */
.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    grid-template-rows: repeat(5, 1fr);
    gap: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.grid-cell {
    position: relative;
    border-right: 1px solid #C8CCD0;
    border-bottom: 1px solid #C8CCD0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.grid-cell:nth-child(7n) {
    border-right: none;
}

.grid-cell:nth-last-child(-n+7) {
    border-bottom: none;
}

/* Content Block */
.content-block {
    max-width: 45ch;
    opacity: 0;
    transform: translateY(12px);
    pointer-events: auto;
}

.month-panel.visible .content-block {
    animation: fadeInUp 400ms cubic-bezier(0.25, 0.1, 0.25, 1) forwards;
}

.content-block:nth-child(1) { animation-delay: 120ms; }
.content-block:nth-child(2) { animation-delay: 180ms; }
.content-block:nth-child(3) { animation-delay: 240ms; }

/* Date Numeral */
.date-numeral {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 1.5rem;
    font-weight: 400;
    letter-spacing: 0.05em;
    display: block;
    margin-bottom: 0.5rem;
    color: inherit;
}

/* Content Text */
.content-text {
    font-size: 0.95rem;
    line-height: 1.6;
    color: #3A3A3C;
}

/* Timeline Spine */
.timeline-spine {
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 4px;
    background-color: #2C2C2E;
    transform: translateY(-50%);
    z-index: 20;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Date Markers */
.date-marker {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 200ms ease-out;
    z-index: 21;
}

/* Circle Marker */
.circle-marker {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: inherit;
    border: 2px solid #2C2C2E;
    opacity: 0;
}

.month-panel.visible .circle-marker {
    animation: fadeIn 400ms cubic-bezier(0.25, 0.1, 0.25, 1) forwards;
}

.circle-marker:hover {
    width: 18px;
    height: 18px;
    margin-left: -3px;
}

/* Diamond Marker */
.diamond-marker {
    width: 14px;
    height: 14px;
    background-color: inherit;
    border: none;
    opacity: 0.8;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.12);
    transform: translateY(-50%) rotate(45deg);
    opacity: 0;
}

.month-panel.visible .diamond-marker {
    animation: fadeIn 400ms cubic-bezier(0.25, 0.1, 0.25, 1) forwards;
}

.diamond-marker:hover {
    width: 18px;
    height: 18px;
    margin-left: -2px;
}

/* Dash Marker */
.dash-marker {
    width: 16px;
    height: 2px;
    background-color: #8E8E93;
    border: none;
    opacity: 0;
}

.month-panel.visible .dash-marker {
    animation: fadeIn 400ms cubic-bezier(0.25, 0.1, 0.25, 1) forwards;
}

/* Marker Tooltip */
.marker-tooltip {
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background-color: #3A3A3C;
    color: #F7F6F3;
    padding: 0.5rem 0.75rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-family: 'IBM Plex Mono', monospace;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 200ms ease-out;
    margin-bottom: 0.5rem;
}

.date-marker:hover .marker-tooltip {
    opacity: 1;
}

/* Vertical Stems */
.vertical-stems {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100%;
    z-index: 15;
    pointer-events: none;
}

.stem {
    position: absolute;
    left: 0;
    width: 1px;
    background-color: inherit;
    opacity: 0.4;
    transition: all 200ms ease-out;
}

.stem-up {
    top: 50%;
    border-top: 1px solid inherit;
}

.stem-down {
    bottom: 50%;
    border-bottom: 1px solid inherit;
}

.month-panel.visible .stem {
    opacity: 0.4;
}

.date-marker:hover ~ .vertical-stems .stem {
    opacity: 0.8;
    width: 2px;
}

/* Month Lower */
.month-lower {
    position: absolute;
    bottom: 48px;
    left: 0;
    right: 0;
    height: calc(48% - 48px);
    display: flex;
    align-items: flex-end;
    justify-content: space-around;
    padding: 2rem 4rem;
    z-index: 10;
}

/* Annotation Block */
.annotation-block {
    position: absolute;
    bottom: 1rem;
    opacity: 0;
    transform: translateY(12px);
}

.month-panel.visible .annotation-block {
    animation: fadeInUp 400ms cubic-bezier(0.25, 0.1, 0.25, 1) forwards;
}

.annotation-block:nth-child(1) { animation-delay: 300ms; }
.annotation-block:nth-child(2) { animation-delay: 360ms; }
.annotation-block:nth-child(3) { animation-delay: 420ms; }

/* Annotation Label */
.annotation-label {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.75rem;
    color: #8E8E93;
    font-weight: 400;
    letter-spacing: 0.05em;
    display: block;
}

/* Navigation Bar */
.navigation-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 48px;
    background-color: #F7F6F3;
    border-top: 1px solid #C8CCD0;
    display: flex;
    z-index: 1000;
    overflow: hidden;
}

/* Nav Month */
.nav-month {
    flex: 1 1 calc(100% / 12);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    background-color: rgba(200, 204, 208, 0.15);
    border-right: 1px solid #C8CCD0;
    transition: background-color 200ms ease-out;
    position: relative;
}

.nav-month:last-child {
    border-right: none;
}

.nav-month:hover {
    background-color: rgba(200, 204, 208, 0.3);
}

.nav-label {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.75rem;
    font-weight: 400;
    letter-spacing: 0.05em;
    color: #3A3A3C;
}

/* Nav Indicator */
.nav-indicator {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 1px;
    height: 4px;
    background-color: #2C2C2E;
    transition: left 200ms ease-out;
    z-index: 1001;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

/* Color assignments for all markers */
.month-panel[data-color="#5B7B8A"] .circle-marker,
.month-panel[data-color="#5B7B8A"] .diamond-marker {
    background-color: #5B7B8A;
    border-color: #2C2C2E;
}

.month-panel[data-color="#5B7B8A"] .stem {
    border-color: #5B7B8A;
}

.month-panel[data-color="#8B7DAF"] .circle-marker,
.month-panel[data-color="#8B7DAF"] .diamond-marker {
    background-color: #8B7DAF;
    border-color: #2C2C2E;
}

.month-panel[data-color="#8B7DAF"] .stem {
    border-color: #8B7DAF;
}

.month-panel[data-color="#6BA368"] .circle-marker,
.month-panel[data-color="#6BA368"] .diamond-marker {
    background-color: #6BA368;
    border-color: #2C2C2E;
}

.month-panel[data-color="#6BA368"] .stem {
    border-color: #6BA368;
}

.month-panel[data-color="#D4A843"] .circle-marker,
.month-panel[data-color="#D4A843"] .diamond-marker {
    background-color: #D4A843;
    border-color: #2C2C2E;
}

.month-panel[data-color="#D4A843"] .stem {
    border-color: #D4A843;
}

.month-panel[data-color="#D47B8A"] .circle-marker,
.month-panel[data-color="#D47B8A"] .diamond-marker {
    background-color: #D47B8A;
    border-color: #2C2C2E;
}

.month-panel[data-color="#D47B8A"] .stem {
    border-color: #D47B8A;
}

.month-panel[data-color="#E8963A"] .circle-marker,
.month-panel[data-color="#E8963A"] .diamond-marker {
    background-color: #E8963A;
    border-color: #2C2C2E;
}

.month-panel[data-color="#E8963A"] .stem {
    border-color: #E8963A;
}

.month-panel[data-color="#E06B54"] .circle-marker,
.month-panel[data-color="#E06B54"] .diamond-marker {
    background-color: #E06B54;
    border-color: #2C2C2E;
}

.month-panel[data-color="#E06B54"] .stem {
    border-color: #E06B54;
}

.month-panel[data-color="#C85A3A"] .circle-marker,
.month-panel[data-color="#C85A3A"] .diamond-marker {
    background-color: #C85A3A;
    border-color: #2C2C2E;
}

.month-panel[data-color="#C85A3A"] .stem {
    border-color: #C85A3A;
}

.month-panel[data-color="#A07840"] .circle-marker,
.month-panel[data-color="#A07840"] .diamond-marker {
    background-color: #A07840;
    border-color: #2C2C2E;
}

.month-panel[data-color="#A07840"] .stem {
    border-color: #A07840;
}

.month-panel[data-color="#B85C3A"] .circle-marker,
.month-panel[data-color="#B85C3A"] .diamond-marker {
    background-color: #B85C3A;
    border-color: #2C2C2E;
}

.month-panel[data-color="#B85C3A"] .stem {
    border-color: #B85C3A;
}

.month-panel[data-color="#8A6878"] .circle-marker,
.month-panel[data-color="#8A6878"] .diamond-marker {
    background-color: #8A6878;
    border-color: #2C2C2E;
}

.month-panel[data-color="#8A6878"] .stem {
    border-color: #8A6878;
}

.month-panel[data-color="#3A4A6B"] .circle-marker,
.month-panel[data-color="#3A4A6B"] .diamond-marker {
    background-color: #3A4A6B;
    border-color: #2C2C2E;
}

.month-panel[data-color="#3A4A6B"] .stem {
    border-color: #3A4A6B;
}

/* Month names should be in their respective colors */
.month-panel[data-color="#5B7B8A"] .month-name { color: #5B7B8A; }
.month-panel[data-color="#8B7DAF"] .month-name { color: #8B7DAF; }
.month-panel[data-color="#6BA368"] .month-name { color: #6BA368; }
.month-panel[data-color="#D4A843"] .month-name { color: #D4A843; }
.month-panel[data-color="#D47B8A"] .month-name { color: #D47B8A; }
.month-panel[data-color="#E8963A"] .month-name { color: #E8963A; }
.month-panel[data-color="#E06B54"] .month-name { color: #E06B54; }
.month-panel[data-color="#C85A3A"] .month-name { color: #C85A3A; }
.month-panel[data-color="#A07840"] .month-name { color: #A07840; }
.month-panel[data-color="#B85C3A"] .month-name { color: #B85C3A; }
.month-panel[data-color="#8A6878"] .month-name { color: #8A6878; }
.month-panel[data-color="#3A4A6B"] .month-name { color: #3A4A6B; }

/* Responsive */
@media (max-width: 768px) {
    .month-upper {
        padding: 2rem;
    }

    .month-lower {
        padding: 1rem;
    }

    .month-name {
        font-size: clamp(2rem, 6vw, 5rem);
    }

    .content-text {
        font-size: 0.85rem;
    }

    .annotation-label {
        font-size: 0.65rem;
    }
}