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

:root {
  --bg:        #0d1117;
  --surface:   #161b22;
  --surface2:  #1c2330;
  --border:    #30363d;
  --accent:    #58a6ff;
  --accent-dim:#1f3a5f;
  --text:      #e6edf3;
  --muted:     #8b949e;
  --water:     #120f22;
  --plain:     #8caa58;
  --highland:  #b09f72;
  --mountain:  #bebebe;
  --radius:    10px;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', 'Segoe UI', sans-serif;
  min-height: 100vh;
  display: grid;
  place-items: start center;
  padding: 48px 16px 64px;
}

.page { width: 100%; max-width: 960px; }

.header { display: flex; align-items: center; gap: 14px; margin-bottom: 32px; }

.header-text h1 { font-size: 1.25rem; font-weight: 600; letter-spacing: -0.02em; }
.header-text p  { font-size: 0.8rem; color: var(--muted); margin-top: 2px; }
.header-text a  { color: var(--accent); text-decoration: none; }
.header-text a:hover { text-decoration: underline; }

.layout {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 16px;
  align-items: start;
}
@media (max-width: 700px) { .layout { grid-template-columns: 1fr; } }

.panel { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.panel-section { padding: 18px 20px; border-bottom: 1px solid var(--border); }
.panel-section:last-child { border-bottom: none; }

.section-title {
  font-size: 0.7rem; font-weight: 600; text-transform: uppercase;
  letter-spacing: 0.08em; color: var(--muted); margin-bottom: 14px;
}

.drop-zone {
  border: 1.5px dashed var(--border); border-radius: 8px;
  padding: 28px 16px; text-align: center; cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}
.drop-zone:hover, .drop-zone.drag-over { border-color: var(--accent); background: var(--accent-dim); }
.drop-zone input { display: none; }

.drop-icon {
  width: 40px; height: 40px; margin: 0 auto 10px;
  background: var(--surface2); border: 1px solid var(--border);
  border-radius: 8px; display: grid; place-items: center; font-size: 1.2rem;
}

.drop-zone .hint { font-size: 0.8rem; color: var(--muted); line-height: 1.5; }
.drop-zone .hint span { color: var(--accent); }

.file-name {
  margin-top: 10px; font-size: 0.75rem; color: var(--accent);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis; display: none;
}

.slider-row {
  display: grid; grid-template-columns: 1fr auto;
  gap: 6px 10px; align-items: center; margin-bottom: 14px;
}
.slider-row:last-child { margin-bottom: 0; }

.slider-label { display: flex; align-items: center; gap: 8px; font-size: 0.82rem; color: var(--text); }

.swatch { width: 12px; height: 12px; border-radius: 3px; flex-shrink: 0; border: 1px solid rgba(255,255,255,0.1); }

.slider-val { font-size: 0.78rem; color: var(--muted); font-variant-numeric: tabular-nums; min-width: 32px; text-align: right; }

input[type="range"] {
  grid-column: 1 / -1; width: 100%; height: 4px;
  -webkit-appearance: none; appearance: none;
  background: var(--border); border-radius: 2px; outline: none; cursor: pointer;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; width: 16px; height: 16px; border-radius: 50%;
  background: var(--accent); border: 2px solid var(--bg);
  box-shadow: 0 0 0 1px var(--accent); cursor: pointer; transition: transform 0.1s;
}
input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.2); }
input[type="range"]::-moz-range-thumb {
  width: 16px; height: 16px; border-radius: 50%;
  background: var(--accent); border: 2px solid var(--bg); cursor: pointer;
}

.toggle-row { display: flex; align-items: center; justify-content: space-between; font-size: 0.82rem; }
.toggle { position: relative; width: 36px; height: 20px; flex-shrink: 0; }
.toggle input { opacity: 0; position: absolute; width: 100%; height: 100%; margin: 0; cursor: pointer; }
.toggle-track {
  position: absolute; inset: 0; background: var(--border);
  border-radius: 20px; cursor: pointer; transition: background 0.2s;
}
.toggle-track::after {
  content: ''; position: absolute; left: 3px; top: 3px;
  width: 14px; height: 14px; background: #fff; border-radius: 50%; transition: transform 0.2s;
}
.toggle input:checked + .toggle-track { background: var(--accent); }
.toggle input:checked + .toggle-track::after { transform: translateX(16px); }

.legend { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.legend-item { display: flex; align-items: center; gap: 8px; font-size: 0.78rem; color: var(--muted); }
.legend-swatch { width: 28px; height: 16px; border-radius: 4px; flex-shrink: 0; border: 1px solid rgba(255,255,255,0.08); }

.preview-panel {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden; display: flex; flex-direction: column;
}
.preview-header {
  padding: 12px 18px; border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
}
.preview-title { font-size: 0.7rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); }
.img-info { font-size: 0.72rem; color: var(--muted); font-variant-numeric: tabular-nums; }

.preview-body {
  background: #080b10; min-height: 320px;
  display: flex; align-items: center; justify-content: center; position: relative; flex: 1;
}
.preview-placeholder { display: flex; flex-direction: column; align-items: center; gap: 10px; color: var(--border); }
.preview-placeholder svg { opacity: 0.4; }
.preview-placeholder p { font-size: 0.82rem; }

#preview { max-width: 100%; max-height: 520px; display: block; image-rendering: pixelated; }

#previewWrap { max-width: 100%; max-height: 520px; }

.preview-footer { padding: 14px 18px; border-top: 1px solid var(--border); }

.btn {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  width: 100%; padding: 10px 20px; border-radius: 8px; border: none;
  font-size: 0.88rem; font-weight: 500; font-family: inherit;
  cursor: pointer; transition: opacity 0.15s, transform 0.1s;
}
.btn:disabled { opacity: 0.3; cursor: default; }
.btn:not(:disabled):hover { opacity: 0.88; }
.btn:not(:disabled):active { transform: scale(0.98); }
.btn-primary   { background: var(--accent); color: #0d1117; }
.btn-secondary { background: var(--accent-dim); color: var(--accent); border: 1px solid var(--accent); margin-top: 8px; }
.btn-ghost     { background: transparent; color: var(--muted); border: 1px solid var(--border); }

.algo-switch { display: flex; gap: 6px; }
.algo-btn {
  flex: 1; padding: 7px 0; border-radius: 6px; border: 1px solid var(--border);
  background: var(--surface2); color: var(--muted); font-size: 0.8rem;
  font-family: inherit; font-weight: 500; cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.algo-btn.active { background: var(--accent-dim); border-color: var(--accent); color: var(--accent); }

.algo-hint {
  margin-top: 10px; font-size: 0.75rem; color: var(--muted); line-height: 1.5;
  background: var(--surface2); border: 1px solid var(--border);
  border-radius: 6px; padding: 7px 10px; word-break: break-word; white-space: normal;
}

canvas { display: none; }

/* Map modal */
.modal-overlay {
  display: none; position: fixed; inset: 0;
  background: rgba(0,0,0,0.7); z-index: 1000;
  align-items: center; justify-content: center;
}
.modal-overlay.open { display: flex; }
.modal {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); width: min(860px, 95vw);
  max-height: 90vh; display: flex; flex-direction: column; overflow: hidden;
}
.modal-header {
  padding: 14px 18px; border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between; flex-shrink: 0;
}
.modal-title { font-size: 0.88rem; font-weight: 600; }
.modal-close { background: none; border: none; color: var(--muted); cursor: pointer; font-size: 1.2rem; line-height: 1; padding: 2px 6px; border-radius: 4px; }
.modal-close:hover { color: var(--text); background: var(--surface2); }

#gisMap { flex: 1; min-height: 420px; }

.modal-footer {
  padding: 12px 18px; border-top: 1px solid var(--border);
  display: flex; align-items: center; gap: 10px; flex-shrink: 0;
}
.modal-footer .btn { width: auto; flex: 1; }
#gisStatus { font-size: 0.75rem; color: var(--muted); flex: 2; line-height: 1.4; }

footer { margin-top: 24px; display: flex; justify-content: center; }
footer a { color: var(--muted); transition: color 0.15s; display: flex; }
footer a:hover { color: var(--text); }

/* Nation modal */
#nationModal .modal { height: 100vh; border-radius: 0; }
#nationMapArea { min-height: 300px; }
#nationMapImg { max-height: 100%; }
#nationList::-webkit-scrollbar { width: 4px; }
#nationList::-webkit-scrollbar-track { background: transparent; }
#nationList::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }
#nameInput:focus { border-color: var(--accent); }

/* Nation markers — anchor point is the tip of the arrow (bottom of nm-pin-tip) */
.nation-marker {
  position: absolute;
  /* translate so tip bottom = spawn coords: shift left 50%, up by (pin+tip height) */
  transform: translate(-50%, calc(-100% + 18px));
  display: flex;
  flex-direction: column;
  align-items: center;
  pointer-events: none;
  z-index: 10;
}
/* label sits above the flag */
.nm-label {
  order: -1;
  background: rgba(13,17,23,0.85);
  color: var(--text);
  font-size: 0.68rem;
  padding: 2px 5px;
  border-radius: 3px;
  white-space: nowrap;
  pointer-events: none;
  margin-bottom: 3px;
  border: 1px solid rgba(255,255,255,0.1);
  max-width: 120px;
  overflow: hidden;
  text-overflow: ellipsis;
  height: 18px;
  line-height: 14px;
}
.nm-pin {
  width: 36px; height: 24px;
  border-radius: 4px;
  border: 2px solid rgba(255,255,255,0.9);
  box-shadow: 0 2px 8px rgba(0,0,0,0.7), 0 0 0 1px rgba(0,0,0,0.3);
  overflow: hidden;
  cursor: grab;
  pointer-events: all;
  user-select: none;
  flex-shrink: 0;
  background: var(--surface2);
  display: flex; align-items: center; justify-content: center;
  position: relative;
}
.nm-pin:active { cursor: grabbing; }
.nm-flag-img {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
}
.nm-flag-placeholder {
  font-size: 0.65rem; font-weight: 700;
  color: var(--accent);
}
.nm-pin-tip {
  width: 0; height: 0;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 7px solid rgba(255,255,255,0.9);
  filter: drop-shadow(0 2px 2px rgba(0,0,0,0.4));
  flex-shrink: 0;
}
.nm-remove, .nm-edit {
  background: rgba(13,17,23,0.9);
  border: 1px solid var(--border);
  color: var(--muted);
  border-radius: 50%;
  width: 16px; height: 16px;
  font-size: 0.7rem; line-height: 1;
  cursor: pointer; pointer-events: all;
  display: flex; align-items: center; justify-content: center;
  padding: 0;
  opacity: 0;
  transition: opacity 0.15s;
  position: absolute;
}
.nm-remove { top: -7px; right: -7px; }
.nm-edit   { top: -7px; left: -7px; }
.nation-marker:hover .nm-remove,
.nation-marker:hover .nm-edit { opacity: 1; }


/* Paint terrain tools */
.paint-terrain-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
}
.paint-btn {
  display: flex; align-items: center; gap: 7px;
  padding: 7px 10px; border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--surface2); color: var(--muted);
  font-size: 0.8rem; font-family: inherit; font-weight: 500;
  cursor: pointer; transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.paint-btn.active {
  background: var(--accent-dim); border-color: var(--accent); color: var(--accent);
}
.paint-btn .legend-swatch { width: 14px; height: 14px; flex-shrink: 0; }

.paint-brush-btn {
  display: flex; align-items: center; gap: 7px;
  padding: 6px 10px; border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--surface2); color: var(--muted);
  font-size: 0.78rem; font-family: inherit; font-weight: 500;
  cursor: pointer; transition: background 0.15s, color 0.15s, border-color 0.15s;
  text-align: left;
}
.paint-brush-btn.active {
  background: var(--accent-dim); border-color: var(--accent); color: var(--accent);
}
.paint-brush-btn svg { flex-shrink: 0; opacity: 0.8; }