:root {
    --bg: #f8f9fa;
    --surface: #ffffff;
    --text: #212529;
    --muted: #6c757d;
    --border: #dee2e6;
    --accent: #0d6efd;
    --accent-hover: #0b5ed7;
    --day-bg: #f1f3f5;
    --event-border: #e9ecef;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 1.5rem;
}

header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}

header h1 {
    margin: 0;
    font-size: 1.75rem;
    font-weight: 600;
}

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

.icon-btn {
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 0.4rem;
    cursor: pointer;
    color: var(--text);
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon-btn:hover:not(:disabled) {
    background: #f1f3f5;
}

.icon-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.drop-zone {
    border: 2px dashed var(--border);
    border-radius: 12px;
    padding: 3rem 1.5rem;
    text-align: center;
    background: var(--surface);
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s;
}

.drop-zone:hover,
.drop-zone.dragover {
    border-color: var(--accent);
    background: #f0f7ff;
}

.drop-content svg {
    color: var(--muted);
    margin-bottom: 0.75rem;
}

.drop-content p {
    margin: 0.25rem 0;
    font-size: 1.1rem;
}

.drop-content .sub {
    color: var(--muted);
    font-size: 0.9rem;
}

.controls {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 1.25rem;
    margin-bottom: 1.5rem;
}

.hidden {
    display: none !important;
}

.controls.hidden,
.agenda:empty {
    display: none;
}

.control-row {
    display: flex;
    gap: 1rem;
    align-items: flex-end;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}

.control-row label {
    display: flex;
    flex-direction: column;
    font-size: 0.85rem;
    font-weight: 500;
    gap: 0.25rem;
}

.control-row input[type="date"],
.control-row select {
    padding: 0.45rem 0.6rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 0.95rem;
    background: white;
}

.primary-btn {
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 6px;
    padding: 0.5rem 1.1rem;
    font-size: 0.95rem;
    cursor: pointer;
    height: fit-content;
}

.primary-btn:hover {
    background: var(--accent-hover);
}

.options {
    display: flex;
    flex-wrap: wrap;
    gap: 1.25rem;
    font-size: 0.9rem;
}

.options label {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    cursor: pointer;
}

.options input[type="number"] {
    padding: 0.2rem 0.4rem;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 0.9rem;
}

.file-info {
    margin-top: 0.75rem;
    font-size: 0.85rem;
    color: var(--muted);
}

.summary {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 1rem 0.5rem;
    margin-bottom: 1rem;
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 0.5rem;
    text-align: center;
}

.summary.hidden {
    display: none;
}

.summary-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 0.25rem 0.5rem;
}

.summary-value {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--accent);
    line-height: 1.2;
    font-variant-numeric: tabular-nums;
}

.summary-label {
    font-size: 0.75rem;
    color: var(--muted);
    margin-top: 0.2rem;
    white-space: nowrap;
}

.day {
    border-bottom: 1px solid var(--border);
    page-break-inside: avoid;
}

.day:last-child {
    border-bottom: none;
}

.day-header {
    background: var(--day-bg);
    padding: 0.6rem 1rem;
    font-weight: 600;
    font-size: 1.05rem;
    border-bottom: 1px solid var(--border);
}

.day.empty .day-header {
    color: var(--muted);
    font-weight: 500;
}

.events {
    padding: 0.5rem 0;
}

.event {
    padding: 0.65rem 1rem;
    border-bottom: 1px solid var(--event-border);
    display: grid;
    grid-template-columns: 140px 1fr;
    gap: 0.75rem;
}

.event:last-child {
    border-bottom: none;
}

.event-time {
    font-weight: 500;
    color: var(--accent);
    font-size: 0.9rem;
    white-space: nowrap;
}

.event.allday .event-time {
    color: #198754;
}

.event-title {
    font-weight: 600;
    margin-bottom: 0.15rem;
}

.event-location,
.event-description,
.event-attendees {
    font-size: 0.85rem;
    color: var(--muted);
    margin-top: 0.2rem;
}

.event-attendees {
    font-style: italic;
}

.event-description {
    white-space: pre-wrap;
}

.no-events {
    padding: 0.75rem 1rem;
    color: var(--muted);
    font-style: italic;
}

/* Print styles */
.tz-note {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
    color: var(--muted);
    background: #f8f9fa;
    border-bottom: 1px solid var(--border);
}

.print-subtitle {
    display: none;
}

@media print {
    .tz-note {
        background: none;
        border: none;
        font-size: 9pt;
        padding: 0 0 0.5rem 0;
    }
    body {
        background: white;
        font-size: 11pt;
    }

    .container {
        max-width: none;
        padding: 0;
    }

    header .header-actions,
    .drop-zone,
    .controls,
    #new-file-btn,
    .summary.hide-on-print {
        display: none !important;
    }

    header {
        margin-bottom: 1rem;
        border-bottom: 2px solid #333;
        padding-bottom: 0.5rem;
    }

    header h1 {
        font-size: 16pt;
        margin: 0 0 0.15rem 0;
    }

    .print-subtitle {
        display: block;
        font-size: 11pt;
        color: #333;
        margin: 0;
    }

    .summary {
        border: 1px solid #ccc;
        padding: 0.5rem;
        margin-bottom: 0.75rem;
    }

    .summary-value {
        font-size: 12pt;
    }

    .summary-label {
        font-size: 8pt;
    }

    .agenda {
        box-shadow: none;
        border: none;
    }

    .day {
        break-inside: avoid;
        page-break-inside: avoid;
    }

    .day-header {
        background: #eee !important;
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }

    .event {
        grid-template-columns: 130px 1fr;
        gap: 0.6rem;
        align-items: baseline;
    }

    .event-time {
        font-size: 9pt;
        font-weight: 500;
        line-height: 1.3;
    }

    a {
        text-decoration: none;
        color: inherit;
    }
}