:root {
  --hex-w: 63px;
  --hex-h: 56px;
  --panel-bg: linear-gradient(160deg, rgba(40, 52, 70, 0.96), rgba(18, 24, 34, 0.96));
  --panel-border: rgba(150, 190, 240, 0.35);
  --text: #e8eef7;
  --muted: #9fb0c8;
  --accent: #6cb6ff;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  background: #05070c;
  color: var(--text);
  font-family: "Segoe UI", "DejaVu Sans", Roboto, sans-serif;
  font-size: 14px;
  user-select: none;
}

#screens { position: absolute; inset: 0; }

.screen { position: absolute; inset: 0; display: none; }
.screen.active { display: block; }

/* ---------------------------------------------------------------- menus -- */

#screen-menu, #screen-new, #screen-join {
  display: none;
  align-items: center;
  justify-content: center;
  background:
    radial-gradient(circle at 50% 20%, rgba(60, 90, 140, 0.35), transparent 60%),
    linear-gradient(180deg, #0b1220, #05070c);
}
#screen-menu.active, #screen-new.active, #screen-join.active { display: flex; }

.menu-card {
  width: 380px;
  padding: 28px 32px;
  border-radius: 14px;
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.6), inset 0 1px 0 rgba(255, 255, 255, 0.08);
  text-align: center;
}
.menu-card.wide { width: 520px; text-align: left; }
.menu-card h1 { margin: 0 0 6px; font-size: 30px; letter-spacing: 1px; }
.menu-card.wide h1 { text-align: center; }
.tagline { color: var(--muted); margin: 0 0 24px; }

.field { display: block; margin: 14px 0; }
.field > span:first-child { display: block; color: var(--muted); margin-bottom: 5px; font-size: 12px; text-transform: uppercase; letter-spacing: 0.06em; }
.field .inline { display: flex; gap: 8px; }
.field .inline input { flex: 1; }

input, select {
  width: 100%;
  padding: 9px 11px;
  border-radius: 7px;
  border: 1px solid rgba(160, 190, 230, 0.3);
  background: rgba(8, 12, 20, 0.85);
  color: var(--text);
  font-size: 14px;
  outline: none;
}
input:focus, select:focus { border-color: var(--accent); }

.row { display: flex; gap: 10px; justify-content: center; margin-top: 18px; }
.menu-card.wide .row { justify-content: flex-end; }

.aero {
  cursor: pointer;
  padding: 9px 18px;
  border-radius: 8px;
  border: 1px solid rgba(150, 190, 240, 0.45);
  background: linear-gradient(180deg, rgba(90, 130, 190, 0.55), rgba(35, 55, 90, 0.85));
  color: var(--text);
  font-size: 14px;
  transition: filter 0.12s ease, transform 0.05s ease;
}
.aero:hover { filter: brightness(1.25); }
.aero:active { transform: translateY(1px); }
.aero:disabled { opacity: 0.4; cursor: default; filter: none; }
.aero.primary { background: linear-gradient(180deg, rgba(110, 175, 255, 0.7), rgba(40, 95, 175, 0.9)); }
.aero.big { display: block; width: 100%; margin: 10px 0; padding: 14px; font-size: 17px; }

.status { min-height: 20px; margin: 14px 0 0; color: #ffcf7a; text-align: center; }

.game-list {
  list-style: none;
  margin: 6px 0 14px;
  padding: 0;
  max-height: 190px;
  overflow-y: auto;
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(150, 190, 240, 0.15);
}
.game-list li { padding: 9px 12px; cursor: pointer; border-bottom: 1px solid rgba(255,255,255,0.05); }
.game-list li:hover { background: rgba(110, 175, 255, 0.15); }
.game-list li.selected { background: rgba(110, 175, 255, 0.3); }

/* ------------------------------------------------------------- world map -- */

#screen-game.active { display: block; }

#map-viewport {
  position: absolute;
  inset: 0;
  overflow: hidden;
  background-image: url("../assets/map_background.png");
  background-size: 512px 512px;
  background-color: #05070c;
  cursor: grab;
}
#map-viewport.dragging { cursor: grabbing; }

#map-world { position: absolute; left: 0; top: 0; transform-origin: 0 0; }
/* Promote the map to its own layer only while panning, so a drag is a GPU
   translation instead of a repaint of every hex. Keeping it off when idle
   avoids holding a huge composited layer in memory. */
#map-viewport.dragging #map-world { will-change: transform; }
.layer { position: absolute; left: 0; top: 0; }

/* Zoomed-out level of detail: the detailed hex/fog/border layers are hidden and
   a single simplified canvas is shown instead. */
#layer-overview { display: none; }
#map-world.lod #layer-overview { display: block; }
#map-world.lod .detail-layer { display: none; }
.overview-block { position: absolute; }

.hex {
  position: absolute;
  width: var(--hex-w);
  height: var(--hex-h);
  clip-path: polygon(100% 50%, 75% 0, 25% 0, 0 50%, 25% 100%, 75% 100%);
}
.hex.terrain {
  background-image: url("../assets/terrain.png");
  background-repeat: no-repeat;
  background-size: 441px 56px;
}
.hex.territory { pointer-events: none; }
.hex.fog { pointer-events: none; }
.fog-unexplored { background: #04040a; }
.fog-explored { background: rgba(4, 6, 18, 0.62); }

.border-seg {
  position: absolute;
  height: 6px;
  border-radius: 3px;
  transform-origin: 0 50%;
  pointer-events: none;
}

.tile-selection {
  position: absolute;
  width: var(--hex-w);
  height: var(--hex-h);
  clip-path: polygon(100% 50%, 75% 0, 25% 0, 0 50%, 25% 100%, 75% 100%);
  border: none;
  box-shadow: inset 0 0 0 3px rgba(255, 255, 255, 0.85);
  pointer-events: none;
}

.entity { position: absolute; }
.unit {
  width: 38px;
  height: 38px;
  margin-left: -19px;
  margin-top: -19px;
  cursor: pointer;
}
.unit .body {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  border: 2px solid rgba(0, 0, 0, 0.65);
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.6);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
.unit .body img { width: 78%; height: 78%; image-rendering: auto; }
.unit.selected .body { box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.9), 0 2px 6px rgba(0,0,0,0.6); }
.unit .health {
  position: absolute;
  left: 3px;
  right: 3px;
  bottom: -7px;
  height: 5px;
  background: rgba(30, 0, 0, 0.85);
  border: 1px solid rgba(0, 0, 0, 0.7);
  border-radius: 3px;
  overflow: hidden;
}
.unit .health .fill { height: 100%; background: #46d36a; }

.city {
  transform: translate(-50%, -50%);
  text-align: center;
}
.city .marker {
  width: 26px;
  height: 26px;
  margin: 0 auto;
  border-radius: 5px;
  border: 2px solid rgba(255, 255, 255, 0.8);
  background-color: #333;
  background-size: cover;
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.7);
}
.city .label {
  margin-top: 2px;
  font-size: 11px;
  color: #fff;
  text-shadow: 0 1px 2px #000, 0 0 4px #000;
  white-space: nowrap;
}

.path-seg {
  position: absolute;
  height: 4px;
  border-radius: 2px;
  transform-origin: 0 50%;
  pointer-events: none;
  opacity: 0.85;
}

/* ------------------------------------------------------------------ HUD -- */

#hud { position: absolute; inset: 0; pointer-events: none; }
#hud .panel { pointer-events: auto; }
.hidden { display: none !important; }

.panel {
  position: absolute;
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.55), inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

#top-panel {
  left: 12px;
  top: 12px;
  min-width: 420px;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 14px;
}

.flag-button {
  width: 64px;
  height: 64px;
  padding: 0;
  border-radius: 10px;
  border: 1px solid var(--panel-border);
  background: rgba(0, 0, 0, 0.3);
  cursor: pointer;
  overflow: hidden;
  flex: 0 0 auto;
}
.flag-button img { width: 100%; height: 100%; object-fit: cover; }
.flag-button:hover { filter: brightness(1.2); }

.top-text { flex: 0 0 auto; min-width: 150px; }
.civ-name { font-size: 19px; font-weight: 600; }
.player-name { color: var(--muted); }
.admin-label { color: #ffcf7a; font-size: 12px; }

.top-stats { display: flex; gap: 16px; margin-left: auto; }
.stat { display: flex; flex-direction: column; align-items: flex-end; }
.stat-label { font-size: 10px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); }
.stat-value { font-size: 15px; font-variant-numeric: tabular-nums; }

#fps-label {
  position: absolute;
  right: 14px;
  top: 12px;
  font-size: 13px;
  color: #8fdc8f;
  text-shadow: 0 1px 2px #000;
}

#bottom-panel {
  left: 50%;
  bottom: 14px;
  transform: translateX(-50%);
  min-width: 420px;
  max-width: 720px;
  padding: 12px 18px;
}
.info-section.hidden { display: none !important; }
.info-title { font-size: 17px; font-weight: 600; margin-bottom: 4px; }
#bottom-panel .row { justify-content: flex-start; margin-top: 10px; }
.health-bar { width: 220px; height: 12px; background: rgba(30, 0, 0, 0.8); border-radius: 6px; overflow: hidden; margin-top: 6px; }
#unit-health-fill { height: 100%; background: linear-gradient(180deg, #6fe08a, #2fa04d); }

/* --------------------------------------------------------------- modals -- */

.modal {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 50;
}
.modal.hidden { display: none; }

.modal-card {
  width: 620px;
  max-height: 80vh;
  display: flex;
  flex-direction: column;
  border-radius: 14px;
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.7);
  overflow: hidden;
}
.modal-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 18px;
  font-size: 19px;
  font-weight: 600;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.modal-sub { padding: 10px 18px; color: var(--muted); }
.modal-body { padding: 12px 18px 18px; overflow-y: auto; }

.modal-close { padding: 4px 11px; }

.tabs { display: flex; gap: 6px; padding: 10px 18px 0; }
.tab {
  cursor: pointer;
  padding: 8px 16px;
  border-radius: 8px 8px 0 0;
  border: 1px solid transparent;
  border-bottom: none;
  background: rgba(0, 0, 0, 0.25);
  color: var(--muted);
}
.tab.active { background: rgba(110, 175, 255, 0.22); color: var(--text); }
.tab-page { display: none; }
.tab-page.active { display: block; }

.row-card {
  display: flex;
  gap: 14px;
  padding: 10px 12px;
  margin-bottom: 8px;
  border-radius: 9px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.05);
}
.row-card .info { flex: 1; }
.row-card .name { font-weight: 600; }
.row-card .desc { color: var(--muted); font-size: 12px; margin: 3px 0; }
.row-card .effects { font-size: 12px; color: #bcd4ff; }
.row-card .cost { font-size: 12px; color: var(--muted); margin-top: 3px; }
.row-card .actions { display: flex; flex-direction: column; gap: 6px; justify-content: center; }
.row-card .actions .aero { min-width: 170px; }

.training-status { padding: 0 18px 16px; }
.progress { height: 14px; margin-top: 8px; background: rgba(0, 0, 0, 0.5); border-radius: 7px; overflow: hidden; }
#train-progress, #buildings-progress { height: 100%; width: 0; background: linear-gradient(180deg, #7fc4ff, #2f7fd0); }

.banner {
  position: absolute;
  left: 50%;
  top: 12px;
  transform: translateX(-50%);
  padding: 10px 20px;
  border-radius: 8px;
  background: rgba(140, 20, 20, 0.9);
  border: 1px solid rgba(255, 120, 120, 0.6);
  z-index: 60;
}