/* ======================================================================
   HUD Header (深海探査艇コンソール)
   ====================================================================== */
.hud-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: calc(env(safe-area-inset-top, 0px) + 54px);
  padding-top: env(safe-area-inset-top, 0px);
  padding-left: max(1.5rem, env(safe-area-inset-left));
  padding-right: max(1.5rem, env(safe-area-inset-right));
  background: rgba(2, 12, 27, 0.75);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(100, 255, 218, 0.12);
  z-index: var(--z-header);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
  box-sizing: border-box;
}

.hud-logo {
  flex-shrink: 0;
}

.hud-logo a {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
}

.logo-img-icon {
  height: 32px;
  width: auto;
  border-radius: 50%;
  mix-blend-mode: screen; /* Blend black background */
  animation: pulse-glow-img 2s infinite ease-in-out;
}

.logo-img-text {
  height: 20px;
  width: auto;
  mix-blend-mode: screen;
}

/* 既存のパルスドットは非表示 */
.hud-logo a::before {
  display: none !important;
}

@keyframes pulse-glow-img {
  0%, 100% {
    filter: drop-shadow(0 0 4px rgba(100, 255, 218, 0.5)) brightness(1);
    transform: scale(1);
  }
  50% {
    filter: drop-shadow(0 0 12px rgba(100, 255, 218, 0.9)) brightness(1.2);
    transform: scale(1.05);
  }
}

/* Telemetry Cluster */
.hud-telemetry {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.telemetry-cluster {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid rgba(100, 255, 218, 0.15);
  padding: 0.22rem 0.7rem;
  border-radius: 20px;
  font-size: 0.78rem;
  color: var(--color-glow-cyan);
}

.telemetry-item {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  white-space: nowrap;
}

.telemetry-label {
  color: var(--color-text-muted);
  font-size: 0.7rem;
}

.telemetry-divider {
  color: rgba(100, 255, 218, 0.3);
  font-size: 0.7rem;
  user-select: none;
}

/* Language Switcher in HUD */
.hud-lang {
  display: flex;
  align-items: center;
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid rgba(100, 255, 218, 0.15);
  border-radius: 20px;
  padding: 0.15rem 0.25rem;
}

.lang-btn {
  background: none;
  border: none;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  cursor: pointer;
  padding: 0.15rem 0.4rem;
  border-radius: 12px;
  transition: all 0.2s ease;
}

.lang-btn:hover {
  color: #fff;
}

.lang-btn.active {
  color: var(--color-surface);
  background: var(--color-glow-cyan);
  font-weight: 700;
  box-shadow: 0 0 6px rgba(100, 255, 218, 0.4);
}

/* ======================================================================
   Main Layout & Content
   ====================================================================== */
.main-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: calc(env(safe-area-inset-top, 0px) + 80px) 2rem 4rem;
  position: relative;
  z-index: var(--z-base);
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.site-footer {
  text-align: center;
  padding: 2.5rem 1.5rem calc(env(safe-area-inset-bottom, 0px) + 2rem);
  font-size: 0.85rem;
  color: var(--color-text-muted);
  border-top: 1px solid var(--glass-border);
  margin-top: 4rem;
  background: rgba(0, 0, 0, 0.3);
}

.footer-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1.2rem;
  margin-bottom: 1rem;
}

.footer-links a {
  color: var(--color-text-muted);
}

.footer-links a:hover {
  color: var(--color-glow-cyan);
}

/* ======================================================================
   iPhone & Mobile Responsive Optimization
   ====================================================================== */
@media (max-width: 768px) {
  .hud-header {
    height: calc(env(safe-area-inset-top, 0px) + 48px);
    padding-left: 0.35rem;
    padding-right: 0.35rem;
  }

  .hud-logo a {
    font-size: 1.05rem;
  }

  .hud-telemetry {
    gap: 0.45rem;
  }

  /* モバイルではピル内のラベル「深度」「水温」を非表示にして「1000m · 3.2°C」とスッキリ見せる */
  .telemetry-cluster {
    padding: 0.18rem 0.5rem;
    gap: 0.4rem;
    font-size: 0.72rem;
  }

  .telemetry-label {
    display: none;
  }

  .main-container {
    padding-top: calc(env(safe-area-inset-top, 0px) + 68px);
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .tools-grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }
}

@keyframes hud-pulse-img {
  0%, 100% {
    opacity: 0.7;
    filter: drop-shadow(0 0 5px rgba(100, 255, 218, 0.4)) brightness(1);
  }
  50% {
    opacity: 1;
    filter: drop-shadow(0 0 15px rgba(100, 255, 218, 0.9)) brightness(1.2);
  }
}

#hud-depth {
  display: inline-block;
  width: 60px; /* 固定幅 (999,999m に対応) */
  text-align: right;
  font-variant-numeric: tabular-nums; /* 数字の幅を等幅にする */
}

#hud-temp {
  display: inline-block;
  width: 40px; /* 固定幅 */
  text-align: right;
  font-variant-numeric: tabular-nums;
}

/* Tools Controls (Search, Sort, Filter) */
.tools-controls {
  display: flex;
  flex-direction: column;
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid rgba(100, 255, 218, 0.15);
  border-radius: 12px;
  padding: 1.25rem;
  margin-bottom: 2rem;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.controls-top {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

@media (min-width: 600px) {
  .controls-top {
    flex-direction: row;
  }
}

.search-input {
  flex-grow: 1;
  background: rgba(2, 12, 27, 0.6);
  border: 1px solid rgba(100, 255, 218, 0.3);
  color: var(--color-text-primary);
  padding: 0.8rem 1rem;
  border-radius: 8px;
  font-size: 1rem;
  outline: none;
  font-family: var(--font-main);
  transition: all 0.2s ease;
}

.search-input:focus {
  border-color: var(--color-glow-cyan);
  box-shadow: 0 0 10px rgba(100, 255, 218, 0.2);
}

.search-input::placeholder {
  color: rgba(160, 174, 192, 0.5);
}

.sort-select {
  background: rgba(2, 12, 27, 0.6);
  border: 1px solid rgba(100, 255, 218, 0.3);
  color: var(--color-glow-cyan);
  padding: 0.8rem 1rem;
  border-radius: 8px;
  font-size: 0.95rem;
  outline: none;
  cursor: pointer;
  font-family: var(--font-main);
  min-width: 160px;
}

.sort-select:focus {
  border-color: var(--color-glow-cyan);
}

.tags-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px dashed rgba(100, 255, 218, 0.15);
}

.tag-btn {
  background: rgba(2, 12, 27, 0.6);
  border: 1px solid rgba(100, 255, 218, 0.2);
  color: var(--color-text-muted);
  padding: 0.4rem 0.85rem;
  border-radius: 20px;
  font-size: 0.8rem;
  cursor: pointer;
  transition: all 0.2s;
  font-family: var(--font-mono);
}

.tag-btn.active, .tag-btn:hover {
  background: rgba(100, 255, 218, 0.15);
  border-color: var(--color-glow-cyan);
  color: var(--color-glow-cyan);
}

.sort-group {
  display: flex;
  gap: 0.5rem;
}

.sort-dir-btn {
  background-color: rgba(2, 12, 27, 0.6);
  border: 1px solid rgba(100, 255, 218, 0.3);
  color: var(--color-glow-cyan);
  border-radius: 8px;
  padding: 0.8rem 1rem;
  font-size: 0.95rem;
  font-family: var(--font-main);
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
  white-space: nowrap;
  -webkit-appearance: none;
  appearance: none;
}

.sort-dir-btn:hover {
  background: rgba(100, 255, 218, 0.15);
}