:root {
  --bg: #040b16;
  --bg-soft: rgba(8, 16, 30, 0.82);
  --panel: rgba(9, 18, 34, 0.72);
  --panel-strong: rgba(7, 14, 28, 0.88);
  --panel-hover: rgba(12, 23, 42, 0.9);
  --border: rgba(142, 176, 235, 0.16);
  --border-strong: rgba(122, 215, 255, 0.38);
  --text: #eef4ff;
  --muted: #90a0ba;
  --muted-strong: #b4c0d7;
  --accent: #7ad7ff;
  --accent-soft: rgba(122, 215, 255, 0.14);
  --success: #95d687;
  --success-soft: rgba(149, 214, 135, 0.14);
  --warning: #ffc56a;
  --warning-soft: rgba(255, 197, 106, 0.14);
  --danger: #ff8a8a;
  --danger-soft: rgba(255, 138, 138, 0.14);
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.42);
  --shadow-soft: 0 14px 48px rgba(0, 0, 0, 0.28);
  --radius: 18px;
  --radius-sm: 12px;
  --radius-pill: 999px;
  --font-display: 'Space Grotesk', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
}

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

html,
body {
  width: 100%;
  height: 100%;
  overscroll-behavior: none;
}

body {
  min-height: 100vh;
  min-height: 100dvh;
  overflow: hidden;
  color: var(--text);
  font-family: var(--font-display);
  background:
    radial-gradient(circle at top left, rgba(122, 215, 255, 0.18), transparent 28%),
    radial-gradient(circle at top right, rgba(82, 156, 255, 0.14), transparent 24%),
    radial-gradient(circle at bottom center, rgba(255, 197, 106, 0.08), transparent 26%),
    linear-gradient(180deg, #08111f 0%, var(--bg) 100%);
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.02), transparent 24%),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03), transparent 18%, transparent 82%, rgba(255, 255, 255, 0.03));
  opacity: 0.7;
}

#gameCanvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.screen {
  position: fixed;
  inset: 0;
  z-index: 10;
  display: flex;
  justify-content: center;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: 1.25rem;
  padding-top: max(1.25rem, env(safe-area-inset-top));
  padding-bottom: max(1.25rem, env(safe-area-inset-bottom));
  background: rgba(4, 9, 18, 0.56);
  backdrop-filter: blur(20px);
}

.glass {
  background: var(--panel) !important;
  backdrop-filter: blur(24px) saturate(180%) !important;
  -webkit-backdrop-filter: blur(24px) saturate(180%) !important;
  border: 1px solid var(--border-strong) !important;
  box-shadow: var(--shadow-soft) !important;
}

.menu-content {
  width: min(420px, 100%);
  margin: auto;
  padding: 2.2rem;
  border-radius: 26px;
  background:
    linear-gradient(180deg, rgba(13, 22, 39, 0.96), rgba(7, 14, 28, 0.9));
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.menu-eyebrow {
  display: inline-block;
  padding: 0.28rem 0.7rem;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.06);
  color: var(--muted-strong);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.title {
  font-size: clamp(2.2rem, 9vw, 3.4rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.28em;
  color: #f7fbff;
  text-indent: 0.28em;
  white-space: nowrap;
  margin: 0.5rem 0;
}

/* Subtitle class preserved for future use */

.menu-note {
  color: var(--muted);
  font-size: 0.94rem;
  line-height: 1.6;
  margin-bottom: 0.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  min-height: 48px;
  padding: 0.72rem 1.2rem;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.03);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.84rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  cursor: pointer;
  transition:
    transform 140ms ease,
    border-color 140ms ease,
    background 140ms ease,
    box-shadow 140ms ease,
    color 140ms ease;
}

.btn:hover {
  transform: translateY(-1px);
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.22);
  box-shadow: var(--shadow-soft);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  width: 100%;
  color: #f7fbff;
  border-color: rgba(122, 215, 255, 0.58);
  background: rgba(122, 215, 255, 0.12);
  box-shadow: inset 0 0 0 1px rgba(122, 215, 255, 0.12);
}

.btn-primary:hover {
  background: rgba(122, 215, 255, 0.18);
  border-color: rgba(122, 215, 255, 0.78);
}

.btn-secondary {
  border-color: rgba(255, 255, 255, 0.14);
  color: var(--muted-strong);
}

.btn-ai {
  width: 100%;
  border-color: rgba(255, 197, 106, 0.32);
  background: rgba(255, 197, 106, 0.06);
}

.btn-ai:hover {
  border-color: rgba(255, 197, 106, 0.52);
  background: rgba(255, 197, 106, 0.1);
}

.btn-confirm {
  border-color: rgba(149, 214, 135, 0.42);
  color: var(--success);
  background: var(--success-soft);
}

.btn-confirm:hover {
  background: rgba(149, 214, 135, 0.22);
}

.btn-attack {
  border-color: rgba(255, 138, 138, 0.42);
  color: var(--danger);
  background: var(--danger-soft);
}

.btn-attack:hover {
  background: rgba(255, 138, 138, 0.22);
}

.btn-ordnance {
  border-color: rgba(255, 197, 106, 0.38);
  color: var(--warning);
  background: var(--warning-soft);
}

.btn-ordnance:hover {
  background: rgba(255, 197, 106, 0.22);
}

.btn-nuke {
  border-color: rgba(255, 110, 110, 0.44);
  color: #ff9a9a;
  background: rgba(255, 100, 100, 0.12);
}

.btn-nuke:hover {
  background: rgba(255, 100, 100, 0.2);
}

.divider {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  color: rgba(255, 255, 255, 0.36);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.divider::before,
.divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: rgba(255, 255, 255, 0.08);
}

.join-row {
  display: flex;
  gap: 0.7rem;
  align-items: stretch;
}

.join-row .btn {
  flex-shrink: 0;
  min-width: 88px;
}

.code-input {
  flex: 1;
  min-width: 0;
  padding: 0.78rem 1rem;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 1rem;
  letter-spacing: 0.34em;
  text-align: center;
  text-transform: uppercase;
}

.code-input::placeholder {
  color: rgba(255, 255, 255, 0.22);
}

.code-input:focus {
  outline: none;
  border-color: var(--border-strong);
  box-shadow: 0 0 0 3px rgba(122, 215, 255, 0.12);
}

.game-code {
  margin-top: 1.2rem;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: clamp(2rem, 8vw, 2.8rem);
  font-weight: 600;
  letter-spacing: 0.44em;
  text-indent: 0.44em;
}

.status-text {
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.5;
}

.hud-bar {
  position: fixed;
  top: 0.8rem;
  left: 0.8rem;
  right: 0.8rem;
  z-index: 5;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.45rem 1rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: rgba(7, 14, 28, 0.78);
  backdrop-filter: blur(28px);
  box-shadow: var(--shadow-soft);
  color: var(--muted-strong);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hud-bottom {
  position: fixed;
  left: 50%;
  bottom: 1rem;
  z-index: 5;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.55rem;
  transform: translateX(-50%);
  width: min(calc(100vw - 2rem), 760px);
}

.hud-bottom-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.45rem;
  width: 100%;
  padding: 0.5rem;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: rgba(7, 14, 28, 0.78);
  backdrop-filter: blur(28px);
  box-shadow: var(--shadow-soft);
}

.status-msg {
  max-width: min(100%, 680px);
  padding: 0.55rem 0.9rem;
  border-radius: var(--radius-pill);
  background: rgba(7, 14, 28, 0.72);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--muted);
  font-size: 0.82rem;
  text-align: center;
  line-height: 1.45;
}

.scenario-title {
  color: #f7fbff;
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.btn-scenario {
  display: block;
  width: 100%;
  padding: 1rem 1.15rem;
  text-align: left;
  border-color: rgba(122, 215, 255, 0.16);
  background: rgba(255, 255, 255, 0.03);
}

.btn-scenario:hover {
  border-color: rgba(122, 215, 255, 0.42);
  background: rgba(122, 215, 255, 0.08);
}

.scenario-name {
  color: var(--text);
  font-size: 0.94rem;
  font-weight: 500;
  letter-spacing: 0.08em;
}

.scenario-desc {
  margin-top: 0.35rem;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.03em;
  line-height: 1.45;
  text-transform: none;
}

.scenario-tag {
  display: inline-block;
  margin-left: 0.5rem;
  padding: 0.1rem 0.4rem;
  border-radius: var(--radius-pill);
  background: rgba(122, 215, 255, 0.1);
  border: 1px solid rgba(122, 215, 255, 0.2);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.56rem;
  font-weight: 400;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  vertical-align: middle;
}

.ship-list {
  position: fixed;
  top: 5.6rem;
  left: 0.9rem;
  z-index: 5;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.ship-entry {
  min-width: 148px;
  padding: 0.5rem 0.7rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(7, 14, 28, 0.72);
  backdrop-filter: blur(28px);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  box-shadow: var(--shadow-soft);
}

.ship-entry:hover {
  background: rgba(12, 23, 42, 0.86);
  border-color: rgba(255, 255, 255, 0.14);
}

.ship-entry.active {
  border-color: rgba(122, 215, 255, 0.42);
  background: rgba(122, 215, 255, 0.1);
}

.ship-entry.destroyed {
  opacity: 0.38;
  cursor: default;
}

.ship-entry.destroyed .ship-name {
  text-decoration: line-through;
}

.ship-name {
  flex: 1;
  color: var(--text);
}

.ship-status {
  color: var(--warning);
  font-size: 0.62rem;
}

.ship-fuel {
  color: var(--muted);
  font-size: 0.62rem;
}

.burn-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-left: 2px;
  border-radius: 50%;
  background: var(--success);
  vertical-align: middle;
}

.ship-details {
  width: 100%;
  margin-top: 0.3rem;
  padding-top: 0.3rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  color: var(--muted);
  font-size: 0.6rem;
  line-height: 1.5;
}

.ship-detail-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.ship-detail-label {
  color: rgba(255, 255, 255, 0.4);
}

.ship-detail-value {
  color: var(--muted-strong);
}

.game-log {
  position: fixed;
  top: 5.6rem;
  right: 0.9rem;
  bottom: 8.8rem;
  width: 250px;
  z-index: 5;
  display: flex;
  flex-direction: column;
  border-radius: var(--radius);
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(7, 14, 28, 0.76);
  backdrop-filter: blur(28px);
  box-shadow: var(--shadow-soft);
}

.game-log-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 0.8rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.log-toggle {
  border: none;
  background: transparent;
  color: var(--muted);
  font-family: inherit;
  font-size: 1rem;
  cursor: pointer;
}

.log-toggle:hover {
  color: var(--text);
}

.log-entries {
  flex: 1;
  overflow-y: auto;
  padding: 0.65rem 0.8rem;
  color: var(--muted-strong);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  line-height: 1.6;
}

.log-entry {
  padding: 0.15rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

.log-turn {
  margin-top: 0.35rem;
  color: var(--accent);
  font-weight: 600;
}

.log-damage {
  color: var(--warning);
}

.log-eliminated {
  color: var(--danger);
}

.log-landed {
  color: var(--success);
}

.log-show-btn {
  position: fixed;
  top: 5.8rem;
  right: 0.9rem;
  z-index: 5;
  padding: 0.5rem 0.8rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(7, 14, 28, 0.74);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  cursor: pointer;
  backdrop-filter: blur(22px);
}

.log-show-btn:hover {
  color: var(--text);
  border-color: rgba(255, 255, 255, 0.18);
}

.log-entries::-webkit-scrollbar {
  width: 5px;
}

.log-entries::-webkit-scrollbar-track {
  background: transparent;
}

.log-entries::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.16);
  border-radius: var(--radius-pill);
}

.ai-section {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.difficulty-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.difficulty-label {
  margin-top: 0.8rem;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.difficulty-select {
  display: flex;
  gap: 0.45rem;
}

.btn-difficulty {
  flex: 1;
  min-height: 42px;
  padding: 0.55rem 0.45rem;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.btn-difficulty.active {
  color: var(--text);
  border-color: rgba(122, 215, 255, 0.44);
  background: rgba(122, 215, 255, 0.12);
}

.ship-tooltip {
  position: fixed;
  z-index: 20;
  min-width: 110px;
  padding: 0.55rem 0.7rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(7, 14, 28, 0.92);
  backdrop-filter: blur(14px);
  color: var(--muted-strong);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  line-height: 1.55;
  pointer-events: none;
  white-space: nowrap;
}

.ship-tooltip .tt-name {
  color: var(--accent);
  font-weight: 600;
}

.ship-tooltip .tt-enemy {
  color: #ffab91;
}

.ship-tooltip .tt-stat {
  color: var(--muted);
}

.ship-tooltip .tt-warn {
  color: var(--warning);
}

.hud-group {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.hud-sep {
  color: rgba(255, 255, 255, 0.2);
  font-size: 0.85rem;
}

.hud-fuel {
  color: var(--accent);
  font-weight: 500;
}

.fleet-status,
.latency-text,
.turn-timer {
  color: var(--muted);
  font-size: 0.68rem;
}

.objective-text {
  color: var(--success);
  font-size: 0.7rem;
  font-weight: 500;
}

.turn-timer-active {
  color: #ced9e8;
}

.turn-timer-slow {
  color: var(--warning);
}

.turn-timer-urgent {
  color: #ff908f;
  animation: timer-pulse 520ms ease-in-out infinite alternate;
}

@keyframes timer-pulse {
  from {
    opacity: 1;
  }

  to {
    opacity: 0.5;
  }
}

.latency-good {
  color: var(--success);
}

.latency-ok {
  color: var(--warning);
}

.latency-bad {
  color: var(--danger);
}

.help-content {
  width: min(420px, 100%);
  text-align: left;
}

.help-content .scenario-title {
  text-align: center;
}

.help-section + .help-section {
  margin-top: 0.85rem;
}

.help-section h3 {
  margin-bottom: 0.3rem;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.help-row {
  padding: 0.14rem 0;
  color: var(--muted-strong);
  font-size: 0.82rem;
}

.help-key {
  display: inline-block;
  min-width: 120px;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.7rem;
}

.help-btn,
.sound-btn {
  position: fixed;
  right: 0.9rem;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(7, 14, 28, 0.78);
  color: var(--muted-strong);
  font-family: var(--font-mono);
  cursor: pointer;
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow-soft);
}

.help-btn {
  bottom: 4.4rem;
  width: 42px;
  height: 42px;
  font-size: 0.92rem;
}

.sound-btn {
  bottom: 7.2rem;
  min-width: 58px;
  height: 42px;
  padding: 0 0.85rem;
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.help-btn:hover,
.sound-btn:hover {
  color: var(--text);
  border-color: rgba(255, 255, 255, 0.2);
  background: rgba(12, 23, 42, 0.9);
}

.sound-btn.muted {
  color: var(--danger);
  border-color: rgba(255, 138, 138, 0.26);
}

#gameOver h2 {
  color: #f7fbff;
  font-size: clamp(1.8rem, 8vw, 2.4rem);
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

#gameOverReason {
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.7;
}

#gameOver .btn {
  display: block;
  width: 100%;
}

.reconnect-overlay {
  position: fixed;
  inset: 0;
  z-index: 15;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(4, 9, 18, 0.78);
  backdrop-filter: blur(18px);
}

.reconnect-content {
  width: min(340px, calc(100vw - 2rem));
  padding: 1.6rem;
  border-radius: 24px;
  border: 1px solid var(--border);
  background: rgba(7, 14, 28, 0.92);
  box-shadow: var(--shadow);
  text-align: center;
}

.reconnect-spinner {
  width: 42px;
  height: 42px;
  margin: 0 auto 1rem;
  border: 3px solid rgba(122, 215, 255, 0.16);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.reconnect-text {
  color: var(--text);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.reconnect-attempt {
  margin-top: 0.35rem;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

.toast-container {
  position: fixed;
  top: 5.2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 25;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.45rem;
  pointer-events: none;
}

.toast {
  max-width: min(420px, calc(100vw - 2rem));
  padding: 0.72rem 1rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  text-align: center;
  backdrop-filter: blur(14px);
  animation: toastIn 0.3s ease-out, toastOut 0.3s ease-in 2.7s forwards;
}

.toast-error {
  color: #ffd3d3;
  background: rgba(115, 30, 30, 0.72);
  border: 1px solid rgba(255, 138, 138, 0.28);
}

.toast-info {
  color: #d8f4ff;
  background: rgba(20, 52, 69, 0.72);
  border: 1px solid rgba(122, 215, 255, 0.24);
}

.toast-success {
  color: #ddf5d8;
  background: rgba(28, 63, 32, 0.72);
  border: 1px solid rgba(149, 214, 135, 0.24);
}

@keyframes toastIn {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes toastOut {
  from {
    opacity: 1;
  }

  to {
    opacity: 0;
  }
}

.tutorial-tip {
  position: fixed;
  left: 50%;
  bottom: 7rem;
  z-index: 20;
  width: min(420px, calc(100vw - 2rem));
  padding: 1.05rem 1.15rem;
  border-radius: 20px;
  border: 1px solid rgba(122, 215, 255, 0.28);
  background: rgba(7, 14, 28, 0.92);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
  transform: translateX(-50%);
  animation: tipFadeIn 0.32s ease-out;
}

@keyframes tipFadeIn {
  from {
    opacity: 0;
    transform: translateX(-50%) translateY(10px);
  }

  to {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
}

.tutorial-tip-text {
  color: var(--text);
  font-size: 0.85rem;
  line-height: 1.65;
}

.tutorial-tip-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
  margin-top: 0.85rem;
}

.btn-tutorial {
  color: var(--accent);
  border-color: rgba(122, 215, 255, 0.34);
  background: rgba(122, 215, 255, 0.1);
}

.btn-tutorial:hover {
  background: rgba(122, 215, 255, 0.18);
}

.btn-tutorial-skip {
  color: var(--muted);
}

.tutorial-progress {
  display: flex;
  justify-content: center;
  gap: 0.32rem;
  margin-top: 0.7rem;
}

.tutorial-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: rgba(122, 215, 255, 0.16);
}

.tutorial-dot.active {
  background: var(--accent);
}

.tutorial-dot.done {
  background: rgba(122, 215, 255, 0.5);
}

.btn[disabled] {
  opacity: 0.42;
  cursor: not-allowed;
  box-shadow: none;
}

.btn[disabled]:hover {
  transform: none;
  background: inherit;
  border-color: inherit;
}

@media (max-width: 760px) {
  .screen {
    padding-left: 0.9rem;
    padding-right: 0.9rem;
  }

  .menu-content {
    padding: 1.25rem;
    border-radius: 22px;
  }

  .title {
    font-size: 2.45rem;
    letter-spacing: 0.24em;
    text-indent: 0.24em;
  }

  .menu-note {
    font-size: 0.88rem;
  }

  .join-row {
    flex-direction: column;
  }

  .join-row .btn {
    width: 100%;
  }

  .hud-bar {
    top: 0.5rem;
    left: 0.5rem;
    right: 0.5rem;
    padding: 0.65rem 0.75rem;
    gap: 0.35rem 0.8rem;
    justify-content: center;
  }

  .hud-bottom {
    bottom: max(0.75rem, env(safe-area-inset-bottom));
    width: calc(100vw - 1rem);
  }

  .hud-bottom-buttons {
    padding: 0.45rem;
  }

  .hud-bottom .btn {
    min-height: 44px;
    flex: 1 1 140px;
  }

  .status-msg {
    font-size: 0.75rem;
    padding: 0.5rem 0.7rem;
  }

  .ship-list {
    top: auto;
    bottom: 6.8rem;
    left: 0.5rem;
    max-height: 24vh;
    overflow-y: auto;
  }

  .ship-entry {
    min-width: 126px;
    padding: 0.42rem 0.58rem;
  }

  .game-log {
    top: auto;
    right: 0.5rem;
    bottom: 6.8rem;
    width: 180px;
    max-height: 26vh;
  }

  .log-show-btn {
    top: auto;
    right: 0.5rem;
    bottom: calc(6.8rem + 0.2rem);
  }

  .help-key {
    min-width: 94px;
  }

  .help-btn {
    bottom: 4rem;
    right: 0.5rem;
  }

  .sound-btn {
    bottom: 6.9rem;
    right: 0.5rem;
  }

  .toast-container {
    top: 4.8rem;
  }

  .tutorial-tip {
    bottom: 7.8rem;
  }
}

@media (max-width: 420px) {
  .menu-content {
    padding: 1rem;
  }

  .title {
    font-size: 2.1rem;
  }

  .scenario-title {
    font-size: 1.02rem;
  }

  .btn {
    padding: 0.66rem 0.95rem;
    font-size: 0.76rem;
    letter-spacing: 0.12em;
  }

  .btn-difficulty {
    font-size: 0.64rem;
  }

  .game-code {
    letter-spacing: 0.28em;
    text-indent: 0.28em;
  }

  .game-log {
    width: 160px;
  }

  .help-content {
    width: min(360px, 100%);
  }

  .tutorial-tip-actions {
    flex-direction: column;
  }

  .tutorial-tip-actions .btn {
    width: 100%;
  }
}

@media (max-height: 560px) {
  .ship-list {
    top: 5.2rem;
    max-height: 40vh;
  }

  .game-log {
    top: 5.2rem;
    max-height: 40vh;
  }

  .hud-bottom {
    bottom: 0.55rem;
  }

  .tutorial-tip {
    bottom: 5.8rem;
  }
}

/* Fleet building */
.fleet-building-content {
  max-width: 28rem;
  max-height: 90vh;
  overflow-y: auto;
}

.fleet-credits {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 1.5rem;
  font-weight: 600;
  color: #4af;
  text-align: center;
  margin-bottom: 0.75rem;
}

.fleet-shop-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.4rem;
  margin-bottom: 1rem;
}

.fleet-shop-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.4rem 0.6rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 0.4rem;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
  font-size: 0.8rem;
}

.fleet-shop-item:hover {
  background: rgba(68, 170, 255, 0.15);
  border-color: rgba(68, 170, 255, 0.4);
}

.fleet-shop-item.disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.fleet-shop-name {
  font-weight: 500;
  color: #dde;
}

.fleet-shop-stats {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.7rem;
  color: #889;
}

.fleet-shop-cost {
  font-family: 'IBM Plex Mono', monospace;
  font-weight: 600;
  color: #4af;
  white-space: nowrap;
}

.fleet-cart-header {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #889;
  margin-bottom: 0.3rem;
}

.fleet-cart {
  min-height: 2rem;
  padding: 0.4rem;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 0.4rem;
  margin-bottom: 0.75rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
}

.fleet-cart-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.2rem 0.5rem;
  background: rgba(68, 170, 255, 0.15);
  border: 1px solid rgba(68, 170, 255, 0.3);
  border-radius: 0.3rem;
  font-size: 0.75rem;
  color: #cde;
  cursor: pointer;
}

.fleet-cart-chip:hover {
  background: rgba(255, 80, 80, 0.2);
  border-color: rgba(255, 80, 80, 0.4);
}

.fleet-cart-chip .chip-remove {
  color: #f66;
  font-weight: 700;
}

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

.fleet-building-actions .btn {
  flex: 1;
}

.fleet-waiting {
  text-align: center;
  color: #889;
  margin-top: 0.5rem;
}

/* Phase Alert Overlay */
#phaseAlert {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 1000;
  pointer-events: none;
  text-align: center;
  opacity: 0;
  transition: opacity 0.3s ease-out;
}

#phaseAlert.active {
  opacity: 1;
  animation: phase-bounce 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.phase-alert-title {
  font-family: var(--font-display);
  font-size: 3.5rem;
  font-weight: 800;
  letter-spacing: 0.2em;
  color: var(--accent);
  text-shadow: 0 0 30px rgba(122, 215, 255, 0.6);
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.phase-alert-subtitle {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--text);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: rgba(0, 0, 0, 0.4);
  padding: 0.4rem 1.2rem;
  border-radius: var(--radius-pill);
  backdrop-filter: blur(8px);
  display: inline-block;
}

@keyframes phase-bounce {
  0% { transform: translate(-50%, -40%) scale(0.9); opacity: 0; }
  100% { transform: translate(-50%, -50%) scale(1); opacity: 1; }
}

/* Micro-interactions & Juice */
.btn:hover:not(:disabled) {
  transform: translateY(-2px) scale(1.02);
  filter: brightness(1.1);
  box-shadow: 0 8px 24px rgba(122, 215, 255, 0.25);
}

.btn:active:not(:disabled) {
  transform: translateY(0) scale(0.98);
}

.fleet-shop-item {
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.fleet-shop-item:hover {
  transform: translateX(4px);
  border-color: var(--accent);
  box-shadow: -4px 0 0 var(--accent);
}

.fleet-cart-chip {
  animation: chip-pop 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes chip-pop {
  0% { transform: scale(0.6); opacity: 0; }
  70% { transform: scale(1.1); }
  100% { transform: scale(1); opacity: 1; }
}

.recoil-anim {
  animation: recoil 0.2s ease-out;
}

@keyframes recoil {
  0% { transform: scale(1); }
  50% { transform: scale(0.95); }
  100% { transform: scale(1); }
}

/* Logging Color Refinement */
.log-enemy { color: var(--danger); }
.log-env { color: var(--accent); }
.log-obj { color: var(--warning); }