:root {
  --bg: #0b0f14;
  --panel: #1a2430;
  --panel-light: #243244;
  --panel-glass: rgba(26, 36, 48, 0.82);
  --cyan: #3fe0ff;
  --violet: #b98bff;
  --orange: #ff9a3c;
  --red: #ff4d5e;
  --green: #63f08f;
  --text: #e6f1f8;
  --text-dim: #8ea3b8;
  --focus: #3fe0ff;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  color-scheme: dark;
}

* { box-sizing: border-box; }

[hidden] { display: none !important; }

html, body {
  height: 100%;
  margin: 0;
  overflow: hidden;
  background: var(--bg);
  background-image:
    linear-gradient(180deg, rgba(63,224,255,0.05), transparent 34%),
    radial-gradient(circle at 50% 18%, rgba(63,224,255,0.1), transparent 28%);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  -webkit-tap-highlight-color: transparent;
  overscroll-behavior: none;
}

#app, .app {
  position: fixed;
  inset: 0;
  display: flex;
  flex-direction: column;
}

.screen {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  padding: calc(var(--safe-top) + 12px) 14px calc(var(--safe-bottom) + 12px);
}

button {
  font-family: inherit;
  cursor: pointer;
}

button:focus-visible,
input:focus-visible,
a:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

/* Loading */
.screen-loading {
  align-items: center;
  justify-content: center;
  gap: 24px;
}
.loading-logo {
  font-size: 1.4rem;
  letter-spacing: 0.35em;
  color: var(--cyan);
  font-weight: 600;
}
.loading-bar {
  width: 160px;
  height: 4px;
  background: var(--panel);
  border-radius: 2px;
  overflow: hidden;
}
.loading-bar-fill {
  height: 100%;
  width: 40%;
  background: var(--cyan);
  animation: loading-sweep 1.1s ease-in-out infinite;
}
@keyframes loading-sweep {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(350%); }
}

/* Menu */
.screen-menu {
  align-items: center;
  justify-content: center;
  gap: 22px;
  text-align: center;
  overflow: hidden;
}
.menu-bg-grid {
  position: absolute;
  inset: 0;
  opacity: 0.22;
  background-image:
    linear-gradient(rgba(63,224,255,0.14) 1px, transparent 1px),
    linear-gradient(90deg, rgba(63,224,255,0.14) 1px, transparent 1px);
  background-size: 34px 34px;
  transform: perspective(360px) rotateX(58deg) translateY(180px);
  transform-origin: center bottom;
  pointer-events: none;
}
.menu-logo,
.menu-intel,
.menu-actions {
  position: relative;
  z-index: 1;
}
.menu-logo h1 {
  margin: 0;
  font-size: clamp(2.15rem, 11vw, 3.2rem);
  letter-spacing: 0.3em;
  color: var(--cyan);
  text-shadow: 0 0 24px rgba(63,224,255,0.35);
}
.tagline {
  margin: 8px 0 0;
  color: var(--text-dim);
  font-size: 0.95rem;
  letter-spacing: 0.02em;
}
.menu-intel {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  width: min(330px, 90vw);
}
.menu-intel span {
  padding: 6px 9px;
  color: var(--text-dim);
  background: rgba(26,36,48,0.62);
  border: 1px solid rgba(63,224,255,0.18);
  border-radius: 8px;
  font-size: 0.75rem;
}
.menu-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  width: min(320px, 82vw);
}

.btn {
  background: var(--panel-glass);
  color: var(--text);
  border: 1px solid var(--panel-light);
  border-radius: 8px;
  padding: 14px 18px;
  font-size: 1rem;
  min-height: 44px;
  min-width: 44px;
  transition: background 0.15s ease, border-color 0.15s ease, transform 0.1s ease;
  backdrop-filter: blur(12px);
}
.btn:active { transform: scale(0.97); }
.btn:hover { border-color: rgba(63,224,255,0.6); }
.btn-primary {
  background: linear-gradient(180deg, #52e6ff, var(--cyan));
  color: #062028;
  border-color: var(--cyan);
  font-weight: 700;
}
.btn-danger {
  background: transparent;
  color: var(--red);
  border-color: var(--red);
}
.btn-icon {
  background: var(--panel-glass);
  color: var(--text);
  border: 1px solid var(--panel-light);
  border-radius: 8px;
  width: 48px;
  height: 48px;
  min-width: 44px;
  min-height: 44px;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(12px);
}
.btn-icon:disabled {
  opacity: 0.42;
}
.btn-execute {
  background: rgba(63, 240, 143, 0.18);
  border-color: var(--green);
  color: var(--green);
}
.btn-danger-icon {
  background: rgba(255,77,94,0.14);
  border-color: rgba(255,77,94,0.8);
  color: var(--red);
}

/* Panel screens (mission select / settings / stats) */
.screen-panel { gap: 16px; }
.panel-header {
  display: flex;
  align-items: center;
  gap: 12px;
}
.panel-header h2 { margin: 0; font-size: 1.2rem; letter-spacing: 0.05em; }

.mission-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  overflow-y: auto;
  padding-bottom: 8px;
}
.mission-card {
  background: var(--panel-glass);
  border: 1px solid var(--panel-light);
  border-radius: 8px;
  padding: 14px;
  text-align: left;
  color: var(--text);
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-height: 44px;
  backdrop-filter: blur(12px);
}
.mission-card[disabled] {
  opacity: 0.4;
  cursor: not-allowed;
}
.mission-card .mission-name { font-weight: 600; }
.mission-card .mission-card-sub {
  color: var(--text-dim);
  font-size: 0.78rem;
  line-height: 1.3;
}
.mission-card .mission-stars { color: var(--panel-light); letter-spacing: 2px; font-size: 0.9rem; }
.mission-card .mission-stars .lit { color: var(--orange); }

.settings-list { display: flex; flex-direction: column; gap: 14px; }
.settings-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--panel);
  border: 1px solid var(--panel-light);
  border-radius: 10px;
  padding: 12px 16px;
  min-height: 44px;
}
.settings-row input[type="checkbox"] {
  width: 22px;
  height: 22px;
  accent-color: var(--cyan);
}

.stats-list {
  background: var(--panel);
  border: 1px solid var(--panel-light);
  border-radius: 10px;
  padding: 12px 16px;
  margin: 0;
  overflow-y: auto;
}
.stats-list div.stat-row {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid var(--panel-light);
}
.stats-list div.stat-row:last-child { border-bottom: none; }
.stats-list dt { color: var(--text-dim); }
.stats-list dd { margin: 0; font-weight: 600; }

/* Playing screen */
.screen-playing {
  padding-left: 10px;
  padding-right: 10px;
  gap: 8px;
}
.hud-top {
  display: flex;
  align-items: center;
  gap: 8px;
}
.hud-mission {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.03em;
}
#hud-mission-name,
#hud-mission-brief {
  display: block;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
#hud-mission-brief {
  color: var(--text-dim);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0;
}
.hud-stats { display: flex; gap: 8px; }
.hud-chip {
  background: var(--panel-glass);
  border: 1px solid var(--panel-light);
  border-radius: 8px;
  padding: 6px 10px;
  font-size: 0.8rem;
  color: var(--text-dim);
  white-space: nowrap;
  backdrop-filter: blur(12px);
}
.hud-package.collected { color: var(--violet); border-color: var(--violet); }
.hud-intel {
  display: flex;
  gap: 8px;
  justify-content: space-between;
  align-items: center;
  color: var(--text-dim);
  font-size: 0.76rem;
}
.hud-intel span {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  padding: 6px 9px;
  background: rgba(26,36,48,0.58);
  border: 1px solid rgba(36,50,68,0.8);
  border-radius: 8px;
}
#hud-objective {
  flex: 1;
}

.board-wrap {
  flex: 1;
  min-height: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: 10px 0;
}
#board-canvas {
  touch-action: none;
  border-radius: 8px;
  box-shadow:
    0 0 0 1px rgba(63,224,255,0.12),
    0 18px 44px rgba(0,0,0,0.45);
}

.planning-banner {
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(11,15,20,0.9);
  border: 1px solid var(--cyan);
  color: var(--cyan);
  padding: 6px 14px;
  border-radius: 8px;
  font-size: 0.8rem;
  white-space: nowrap;
  pointer-events: none;
  box-shadow: 0 8px 24px rgba(0,0,0,0.32);
}
.planning-banner.danger {
  border-color: var(--red);
  color: var(--red);
}

.hud-bottom {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 14px;
  padding: 0 4px 2px;
}
.dpad {
  display: grid;
  grid-template-columns: repeat(3, 54px);
  grid-template-rows: repeat(2, 54px);
  gap: 8px;
}
.dpad .btn-icon {
  width: 54px;
  height: 54px;
  font-size: 1.25rem;
}
.dpad-up { grid-column: 2; grid-row: 1; }
.dpad-left { grid-column: 1; grid-row: 2; }
.dpad-right { grid-column: 3; grid-row: 2; }
.dpad-down { grid-column: 2; grid-row: 2; }
.action-stack {
  display: grid;
  grid-template-columns: repeat(2, 52px);
  gap: 8px;
  align-items: end;
}
.action-stack .btn-icon {
  width: 52px;
  height: 52px;
}
.toast-stack {
  position: absolute;
  left: 50%;
  bottom: 10px;
  width: min(330px, calc(100vw - 36px));
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}
.toast {
  align-self: center;
  max-width: 100%;
  padding: 9px 12px;
  color: var(--text);
  background: rgba(11,15,20,0.92);
  border: 1px solid rgba(63,224,255,0.36);
  border-left: 3px solid var(--cyan);
  border-radius: 8px;
  box-shadow: 0 10px 26px rgba(0,0,0,0.36);
  font-size: 0.78rem;
  line-height: 1.35;
  animation: toast-in 0.18s ease forwards, toast-out 0.2s ease forwards 2.35s;
}
.toast.warning { border-left-color: var(--orange); }
.toast.danger { border-left-color: var(--red); }
.toast.success { border-left-color: var(--green); }
@keyframes toast-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes toast-out {
  to { opacity: 0; transform: translateY(8px); }
}

/* Overlays */
.overlay {
  position: absolute;
  inset: 0;
  background: rgba(6,8,11,0.82);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 20;
  animation: overlay-in 0.2s ease;
}
@keyframes overlay-in {
  from { opacity: 0; }
  to { opacity: 1; }
}
.overlay-card {
  background: rgba(26,36,48,0.96);
  border: 1px solid var(--panel-light);
  border-radius: 8px;
  padding: 28px 24px;
  width: min(320px, 84vw);
  display: flex;
  flex-direction: column;
  gap: 10px;
  text-align: center;
  box-shadow: 0 24px 70px rgba(0,0,0,0.55);
}
.overlay-card h2 { margin: 0 0 6px; }
.stars {
  font-size: 1.6rem;
  color: var(--panel-light);
  letter-spacing: 6px;
  margin: 6px 0;
}
.stars .lit { color: var(--orange); }

@media (prefers-reduced-motion: reduce) {
  .loading-bar-fill { animation: none; }
  .overlay { animation: none; }
  .toast { animation: none; }
}

@media (min-width: 640px) {
  .app { align-items: center; }
  .screen { max-width: 560px; left: 50%; transform: translateX(-50%); }
  .mission-grid { grid-template-columns: repeat(2, 1fr); }
  .hud-bottom { justify-content: center; }
}

@media (max-height: 720px) {
  .screen-playing {
    gap: 6px;
  }
  .dpad {
    grid-template-columns: repeat(3, 48px);
    grid-template-rows: repeat(2, 48px);
    gap: 6px;
  }
  .dpad .btn-icon,
  .action-stack .btn-icon {
    width: 48px;
    height: 48px;
  }
  .action-stack {
    grid-template-columns: repeat(2, 48px);
    gap: 6px;
  }
}

@media (max-width: 639px) {
  .board-wrap {
    align-items: flex-start;
    padding-top: 18px;
  }
}