* { box-sizing: border-box; }
body { margin: 0; font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; background: #e5e7eb; }

.app { display: flex; height: 100vh; overflow: hidden; }
.screen { flex: 1; display: flex; }
.screen.hidden { display: none !important; }

/* Upload */
#uploadScreen { align-items: center; justify-content: center; }
.upload-area { text-align: center; padding: 2rem; }
.upload-area h1 { margin: 0 0 0.5rem; font-size: 1.5rem; }
.upload-area p { color: #6b7280; margin: 0 0 1.5rem; }
.upload-btn { display: inline-block; padding: 0.75rem 1.5rem; background: #2563eb; color: #fff; border-radius: 8px; cursor: pointer; font-weight: 500; }
.upload-btn:hover { background: #1d4ed8; }

/* Map layout */
#mapScreen { flex-direction: row; min-width: 0; min-height: 0; }
.toolbar { width: 64px; background: #fff; border-right: 1px solid #e5e7eb; display: flex; flex-direction: column; align-items: center; padding: 16px 8px; gap: 8px; border-radius: 0 0 12px 0; box-shadow: 0 1px 3px rgba(0,0,0,0.08); }
.tool-btn { width: 40px; height: 40px; border: none; background: transparent; border-radius: 8px; cursor: pointer; color: #374151; display: flex; align-items: center; justify-content: center; }
.tool-btn:hover { background: #f3f4f6; }
.tool-btn.active { background: #dbeafe; color: #2563eb; }
.tool-btn svg { shape-rendering: geometricPrecision; }

.map-wrap { flex: 1; position: relative; display: flex; flex-direction: column; min-width: 0; min-height: 0; padding: 4px; }
.zoom-controls { position: absolute; bottom: 24px; right: 24px; left: auto; display: flex; align-items: center; gap: 8px; padding: 6px 12px; background: #fff; border-radius: 8px; box-shadow: 0 2px 8px rgba(0,0,0,0.12); z-index: 10; }
.zoom-controls button { width: 28px; height: 28px; border: none; background: #f3f4f6; border-radius: 6px; font-size: 18px; cursor: pointer; line-height: 1; color: #374151; }
.zoom-controls button:hover { background: #e5e7eb; }
#zoomDisplay { min-width: 48px; text-align: center; font-size: 14px; font-weight: 500; }

.map-container { flex: 1; overflow: hidden; position: relative; background: #e6eaed; border-radius: 8px; box-shadow: inset 0 0 0 1px #e5e7eb; min-height: 0; cursor: grab; }
.map-container:active { cursor: grabbing; }
.svg-transform-wrap { position: absolute; inset: 0; display: block; }
.svg-wrapper { display: block; width: 100%; height: 100%; }
.svg-wrapper svg { width: 100%; height: 100%; display: block; shape-rendering: geometricPrecision; text-rendering: geometricPrecision; }
/* When zoomed: only section covers hidden; lines and row-labels stay visible */
.svg-wrapper svg .identifiers-normal { }
.svg-wrapper svg .identifiers-faint { visibility: hidden; pointer-events: none; }
.svg-wrapper svg .identifiers-hidden { visibility: hidden; }

.panel { width: 280px; background: #fff; border-left: 1px solid #e5e7eb; padding: 20px; overflow-y: auto; }
.panel h2 { margin: 0 0 16px; font-size: 1rem; font-weight: 600; }
.total-row { display: flex; justify-content: space-between; padding: 12px; background: #f9fafb; border-radius: 8px; margin-bottom: 16px; }
.total-row strong { font-size: 1.25rem; }
.sections-list { display: flex; flex-direction: column; gap: 6px; }
.section-item { display: flex; justify-content: space-between; padding: 8px 12px; background: #f9fafb; border-radius: 6px; font-size: 14px; }
.section-item .sec-name { font-weight: 500; }
.section-item .sec-count { color: #6b7280; }

/* Popover - dark theme; centered above anchor; arrow points down to element */
.popover { position: fixed; z-index: 1000; pointer-events: none; left: 0; top: 0; }
.popover.hidden { display: none !important; }
.popover-inner { background: #1f2937; border-radius: 12px; padding: 16px 24px; box-shadow: 0 8px 24px rgba(0,0,0,0.35); display: flex; flex-direction: column; align-items: center; gap: 12px; }
.popover-main { display: flex; gap: 32px; justify-content: center; align-items: center; }
.popover-row { display: flex; flex-direction: column; gap: 4px; align-items: center; text-align: center; }
.popover-label { font-size: 11px; font-weight: 600; color: #fff; text-transform: uppercase; letter-spacing: 0.05em; }
.popover-value { font-size: 22px; font-weight: 600; color: #fff; line-height: 1.2; }
.popover-arrow { position: absolute; bottom: -6px; left: 50%; transform: translateX(-50%); width: 0; height: 0; border-left: 6px solid transparent; border-right: 6px solid transparent; border-top: 6px solid #1f2937; }
.popover-accessible { display: flex; align-items: center; justify-content: center; gap: 8px; width: 100%; padding-top: 8px; border-top: 1px solid #4b5563; color: #fff; font-size: 12px; font-weight: 500; }
.popover-accessible.hidden { display: none !important; }
.popover-wheelchair { flex-shrink: 0; color: #fff; }

/* Accessible (DA/DB) seats: yellow with centered wheelchair icon */
.svg-wrapper .seat-wheelchair-icon { pointer-events: none; }

/* Highlight overlays */
.seat-highlight { fill: rgba(37, 99, 235, 0.4) !important; }
.row-highlight rect { fill: rgba(37, 99, 235, 0.25) !important; }
.section-highlight { fill: rgba(37, 99, 235, 0.2) !important; }

/* Section identifier hover when zoomed out */
.map-container:not(.zoom-in) [data-section-id]:hover { fill: rgba(37, 99, 235, 0.12) !important; }

/* NZ capacity modal */
.modal { position: fixed; inset: 0; z-index: 2000; display: flex; align-items: center; justify-content: center; padding: 24px; }
.modal.hidden { display: none !important; }
.modal-backdrop { position: absolute; inset: 0; background: rgba(0,0,0,0.5); }
.modal-dialog { position: relative; background: #fff; border-radius: 12px; padding: 24px; max-width: 420px; width: 100%; max-height: calc(100vh - 48px); display: flex; flex-direction: column; box-shadow: 0 24px 48px rgba(0,0,0,0.25); }
.modal-dialog h2 { margin: 0 0 8px; font-size: 1.25rem; flex-shrink: 0; }
.modal-desc { margin: 0 0 20px; color: #6b7280; font-size: 14px; }
.modal-desc code { padding: 2px 6px; background: #f3f4f6; border-radius: 4px; font-size: 13px; }
.modal-form { display: flex; flex-direction: column; gap: 16px; flex: 1; min-height: 0; overflow: hidden; }
.modal-form #nzInputs { overflow-y: auto; flex: 1 1 auto; min-height: 0; display: flex; flex-direction: column; gap: 16px; }
.modal-form .input-row { display: flex; flex-direction: column; gap: 4px; flex-shrink: 0; }
.modal-form label { font-size: 13px; font-weight: 500; color: #374151; }
.modal-form input { padding: 8px 12px; border: 1px solid #e5e7eb; border-radius: 6px; font-size: 14px; }
.modal-form input:focus { outline: none; border-color: #2563eb; }
.modal-actions { display: flex; justify-content: flex-end; gap: 8px; flex-shrink: 0; }
.modal-btn { padding: 8px 20px; border-radius: 6px; font-size: 14px; font-weight: 500; cursor: pointer; border: none; }
.modal-btn.primary { background: #2563eb; color: #fff; }
.modal-btn.primary:hover { background: #1d4ed8; }