/* ========================================
   Git-Style Timeline
   ======================================== */
.timeline-section {
    position: relative;
    background: var(--bg-primary);
}

.git-timeline {
    position: relative;
    margin-top: var(--spacing-lg);
}

/* Year Timeline (Side) */
.year-timeline {
    position: absolute;
    left: 2rem;
    top: 0;
    bottom: 0;
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    padding: var(--spacing-xl) 0;
    z-index: 1;
}

.year-timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(
        to bottom,
        transparent,
        var(--neon-cyan) 10%,
        var(--neon-cyan) 90%,
        transparent
    );
    transform: translateX(-50%);
    box-shadow: 0 0 10px var(--neon-cyan);
}

.year-mark {
    position: relative;
    font-family: var(--font-mono);
    font-size: 1.2rem;
    font-weight: bold;
    color: var(--neon-cyan);
    text-shadow: 0 0 10px var(--neon-cyan);
    background: var(--bg-primary);
    padding: 0.5rem 1rem;
    border: 2px solid var(--neon-cyan);
    border-radius: 4px;
    box-shadow: 0 0 15px rgba(0, 245, 255, 0.4);
    z-index: 2;
    width: fit-content;
}

/* SVG Container for Branch Lines */
.timeline-svg {
    display: none;
}

.timeline-svg line,
.timeline-svg path {
    stroke-width: 2;
    fill: none;
}

/* Branch Colors */
.branch-main {
    stroke: var(--neon-cyan);
    filter: drop-shadow(0 0 5px var(--neon-cyan));
}

.branch-university {
    stroke: var(--neon-magenta);
    filter: drop-shadow(0 0 5px var(--neon-magenta));
}

.branch-nessy {
    stroke: var(--neon-green);
    filter: drop-shadow(0 0 5px var(--neon-green));
}

.branch-dgtl {
    stroke: #ff6b00;
    filter: drop-shadow(0 0 5px #ff6b00);
}

/* Timeline Events Container */
.timeline-events {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: var(--spacing-lg);
    padding: var(--spacing-md) 0;
    max-width: 1400px;
    margin: 0 auto;
    margin-left: 10rem;
}

/* Timeline Event */
.timeline-event {
    position: relative;
    opacity: 1;
    transition: all 0.6s ease;
}

.timeline-event.animate {
    animation: fadeInUp 0.6s ease;
}

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

/* Positioning based on timeline logic */
/* 1999 - Start: spans all 6 columns */
.timeline-event[data-year="1999"] {
    grid-column: 1 / -1;
    justify-self: stretch;
    grid-row: 1;
}

.timeline-event[data-year="1999"] .event-card {
    max-width: 100%;
}

/* 2017 - Frühstudium: first 50% (columns 1-3) */
.timeline-event[data-year="2017"] {
    grid-column: 1 / 4;
    grid-row: 2;
}

/* 2017 - Abitur: second 50% (columns 4-6) */
.timeline-event[data-year="2017-abitur"] {
    grid-column: 4 / 7;
    grid-row: 2;
}

/* 2018 - University: spans vertically (long card downward) to show duration */
.timeline-event[data-year="2018"] {
    grid-column: 1 / 3;
    grid-row: 3 / 12;
}

.timeline-event[data-year="2018"] .event-card {
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    background: linear-gradient(180deg, var(--card-bg) 0%, rgba(255, 0, 255, 0.05) 50%, var(--card-bg) 100%);
}

/* 2021 - Nessy: columns 3-4 (33%), spans from 2021 to bottom - aligned with 2021 marker */
.timeline-event[data-year="2021"] {
    grid-column: 3 / 5;
    grid-row: 7 / 13;
}

.timeline-event[data-year="2021"] .event-card {
    height: 100%;
    display: flex;
    flex-direction: column;
    background: linear-gradient(180deg, var(--card-bg) 0%, rgba(57, 255, 20, 0.05) 50%, var(--card-bg) 100%);
}

/* Sep 2025 - DGTL: columns 5-6 (33%), spans from 2025 to bottom - aligned with 2025 marker */
.timeline-event[data-year="2025-09"] {
    grid-column: 5 / 7;
    grid-row: 11 / 13;
}

.timeline-event[data-year="2025-09"] .event-card {
    height: 100%;
    display: flex;
    flex-direction: column;
    background: linear-gradient(180deg, var(--card-bg) 0%, rgba(255, 107, 0, 0.05) 50%, var(--card-bg) 100%);
}

/* Event Marker (Commit Dots) */
.event-marker {
    display: none;
}

.event-marker:hover {
    transform: scale(1.3);
    box-shadow: 0 0 20px var(--neon-cyan), 0 0 40px var(--neon-cyan);
}

/* Branch Start Marker */
.event-marker.branch-start {
    border-color: var(--neon-magenta);
    box-shadow: 0 0 10px var(--neon-magenta), 0 0 20px var(--neon-magenta);
}

.event-marker.branch-start:hover {
    box-shadow: 0 0 20px var(--neon-magenta), 0 0 40px var(--neon-magenta);
}

/* Merge Marker */
.event-marker.merge-marker {
    border-color: var(--neon-green);
    box-shadow: 0 0 10px var(--neon-green), 0 0 20px var(--neon-green);
    width: 24px;
    height: 24px;
}

.event-marker.merge-marker:hover {
    box-shadow: 0 0 20px var(--neon-green), 0 0 40px var(--neon-green);
}

/* Branch markers based on type */
.timeline-event[data-branch="university"] .event-marker {
    border-color: var(--neon-magenta);
    box-shadow: 0 0 10px var(--neon-magenta), 0 0 20px var(--neon-magenta);
}

.timeline-event[data-branch="nessy"] .event-marker {
    border-color: var(--neon-green);
    box-shadow: 0 0 10px var(--neon-green), 0 0 20px var(--neon-green);
}

.timeline-event[data-branch="dgtl"] .event-marker {
    border-color: #ff6b00;
    box-shadow: 0 0 10px #ff6b00, 0 0 20px #ff6b00;
}

/* Event Card */
.event-card {
    width: 100%;
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: var(--spacing-md);
    transition: all 0.3s ease;
    cursor: pointer;
}

.event-card:hover {
    border-color: var(--neon-cyan);
    box-shadow: 0 0 20px rgba(0, 245, 255, 0.3);
    transform: translateY(-5px);
}

.event-card.highlight {
    border-color: var(--neon-magenta);
}

.event-card.highlight:hover {
    border-color: var(--neon-green);
    box-shadow: 0 0 20px rgba(57, 255, 20, 0.3);
}

/* Event Header */
.event-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
    font-family: var(--font-mono);
    font-size: 0.85rem;
}

.event-date {
    color: var(--neon-cyan);
    font-weight: bold;
}

.event-location {
    color: var(--text-muted);
}

/* Branch Tags */
.branch-tag {
    background: rgba(255, 0, 255, 0.1);
    border: 1px solid var(--neon-magenta);
    color: var(--neon-magenta);
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    font-size: 0.75rem;
}

.merge-tag {
    background: rgba(57, 255, 20, 0.1);
    border: 1px solid var(--neon-green);
    color: var(--neon-green);
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    font-size: 0.75rem;
}

.achievement-tag {
    background: rgba(255, 215, 0, 0.1);
    border: 1px solid #ffd700;
    color: #ffd700;
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: bold;
    box-shadow: 0 0 10px rgba(255, 215, 0, 0.3);
}

/* Event Title */
.event-title {
    font-family: var(--font-mono);
    font-size: 1.4rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

/* Event Description */
.event-description {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-sm);
}

/* Event Highlights */
.event-highlights {
    list-style: none;
    margin: var(--spacing-sm) 0;
}

.event-highlights li {
    position: relative;
    padding-left: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

.event-highlights li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--neon-cyan);
    font-weight: bold;
}

/* Event Meta */
.event-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--spacing-sm);
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--border-color);
    font-family: var(--font-mono);
    font-size: 0.8rem;
}

.commit-hash {
    color: var(--text-muted);
}

.branch-status {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    font-weight: bold;
}

.branch-status.active {
    color: var(--neon-green);
}

.branch-status.active::before {
    content: '●';
    animation: pulse 2s infinite;
}

/* Center Line Visual (Optional - for reference) */
.timeline-center-line {
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(
        to bottom,
        transparent,
        var(--border-color) 10%,
        var(--border-color) 90%,
        transparent
    );
    transform: translateX(-50%);
    z-index: 0;
}

/* ========================================
   Responsive Timeline
   ======================================== */
@media (max-width: 1024px) {
    .event-card {
        max-width: 450px;
    }
}

@media (max-width: 968px) {
    /* Timeline section padding */
    .timeline-section {
        padding: var(--spacing-lg) var(--spacing-sm);
    }

    /* Stack timeline vertically on tablet/mobile */
    .timeline-events {
        grid-template-columns: 1fr;
        padding: 0;
        gap: var(--spacing-md);
        margin-left: 0;
    }

    /* Hide year timeline on mobile */
    .year-timeline {
        display: none;
    }

    /* Reset all grid positioning on mobile */
    .timeline-event[data-year="1999"],
    .timeline-event[data-year="2017"],
    .timeline-event[data-year="2017-abitur"],
    .timeline-event[data-year="2018"],
    .timeline-event[data-year="2021"],
    .timeline-event[data-year="2025-09"] {
        grid-column: 1;
        grid-row: auto;
        justify-self: stretch;
        align-self: auto;
    }

    /* Reset card heights on mobile */
    .timeline-event[data-year="2018"] .event-card,
    .timeline-event[data-year="2021"] .event-card,
    .timeline-event[data-year="2025-09"] .event-card {
        height: auto;
    }

    .event-card {
        max-width: 100%;
        padding: var(--spacing-sm);
    }

    .event-header {
        flex-direction: column;
        gap: 0.5rem;
        align-items: flex-start;
    }

    .event-title {
        font-size: 1.2rem;
    }

    .event-description {
        font-size: 0.95rem;
    }

    .event-highlights {
        font-size: 0.9rem;
    }

    .event-highlights li {
        font-size: 0.9rem;
    }

    .event-meta {
        font-size: 0.75rem;
        flex-direction: column;
        gap: 0.5rem;
        align-items: flex-start;
    }
}

@media (max-width: 640px) {
    .timeline-section {
        padding: var(--spacing-md) var(--spacing-xs);
    }

    .timeline-events {
        gap: var(--spacing-sm);
    }

    .event-card {
        padding: var(--spacing-sm);
    }

    .event-title {
        font-size: 1.1rem;
    }

    .event-description {
        font-size: 0.9rem;
    }

    .event-date,
    .event-location {
        font-size: 0.8rem;
    }

    .branch-tag,
    .merge-tag,
    .achievement-tag {
        font-size: 0.7rem;
        padding: 0.2rem 0.5rem;
    }

    .event-highlights li {
        font-size: 0.85rem;
        padding-left: 1.2rem;
    }

    .event-meta {
        font-size: 0.7rem;
    }
}

/* ========================================
   Timeline Animations
   ======================================== */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
        text-shadow: 0 0 5px var(--neon-green);
    }
    50% {
        opacity: 0.5;
        text-shadow: 0 0 10px var(--neon-green);
    }
}


/* Draw line animation for SVG paths */
@keyframes drawLine {
    to {
        stroke-dashoffset: 0;
    }
}

.timeline-svg path,
.timeline-svg line {
    stroke-dasharray: 1000;
    stroke-dashoffset: 1000;
    animation: drawLine 2s ease forwards;
}

/* Delayed animations for different branches */
.timeline-svg .branch-main {
    animation-delay: 0s;
}

.timeline-svg .branch-university {
    animation-delay: 0.3s;
}

.timeline-svg .branch-nessy {
    animation-delay: 0.6s;
}

.timeline-svg .branch-dgtl {
    animation-delay: 0.9s;
}