:root {
    --timeline-day-width: 20px;
    --timeline-row-height: 60px;
    --vi-robijn: #ec2e67;
    --vi-violet: #722fd0;
    --vi-blue: #0001d2;

    /* Theme-specific variables (default Light Mode) */
    --planning-bg: #ffffff;
    --planning-header-bg: #f9fafb;
    --planning-text-main: #3c3c3c;
    --planning-text-muted: #6b7280;
    --planning-border-light: rgba(0, 0, 0, 0.05);
    --planning-border-heavy: rgba(0, 0, 0, 0.1);
    --planning-month-bg: rgba(0, 0, 0, 0.02);
    --planning-month-border: rgba(0, 0, 0, 0.05);
    --planning-grid-line: rgba(0, 0, 0, 0.05);
}

.dark {
    --planning-bg: #0d0d0d;
    --planning-header-bg: #121212;
    --planning-text-main: rgba(255, 255, 255, 0.9);
    --planning-text-muted: rgba(255, 255, 255, 0.75);
    --planning-border-light: rgba(255, 255, 255, 0.05);
    --planning-border-heavy: rgba(255, 255, 255, 0.1);
    --planning-month-bg: rgba(255, 255, 255, 0.02);
    --planning-month-border: rgba(255, 255, 255, 0.1);
    --planning-grid-line: rgba(255, 255, 255, 0.04);
}

#planning-container {
    background-color: transparent;
}

#timeline-grid {
    padding-bottom: 40px;
    background-color: transparent;
}

#timeline-header {
    background-color: var(--planning-header-bg);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--planning-border-heavy);
    height: 72px; /* 32px month + 40px week */
    overflow: hidden;
}

#month-row {
    height: 32px;
    min-height: 32px;
}

#week-row {
    height: 40px;
    min-height: 40px;
}

.timeline-month {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    padding-left: 1rem;
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--planning-text-main);
    border-right: 1px solid var(--planning-month-border);
    background: var(--planning-month-bg);
    min-width: max-content;
    white-space: nowrap;
}

.timeline-week {
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding-left: 0.75rem;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--planning-text-muted);
    border-right: 1px solid var(--planning-border-light);
    min-width: max-content;
}

.timeline-week .week-num {
    font-size: 0.85rem;
    font-weight: 800;
    color: var(--vi-robijn);
    margin-bottom: 1px;
}

/* Row layout */
.resource-row {
    min-height: var(--timeline-row-height);
    border-bottom: 1px solid var(--planning-border-light);
    position: relative;
}

.card-bar {
    position: absolute;
    height: 32px;
    background: linear-gradient(135deg, #ec2e67 0%, #e765d0 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    padding: 0;
    font-size: 11px;
    font-weight: 600;
    color: white;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    z-index: 10;
    border: 1px solid var(--card-border);
    overflow: hidden;
}

.card-label {
    position: sticky;
    left: 8px;
    padding: 0 12px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 100%;
    display: block;
}

.card-bar:hover {
    transform: scale(1.02);
    box-shadow: 0 8px 25px rgba(236, 46, 103, 0.4);
    z-index: 30;
    filter: brightness(1.1);
}

.card-bar.blue {
    background: linear-gradient(135deg, #0001d2 0%, #722fd0 100%);
    box-shadow: 0 4px 15px rgba(0, 1, 210, 0.2);
}

.card-bar.blue:hover {
    box-shadow: 0 8px 25px rgba(0, 1, 210, 0.4);
}

/* Day grid lines */
.day-line {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 1px;
    background: var(--planning-grid-line);
    pointer-events: none;
}

.weekend {
    background: rgba(255, 255, 255, 0.02);
}

#today-line {
    width: 2px !important;
}