.is-hidden { display: none !important; }

.copy-helper {
  position: absolute;
  left: -9999px;
  top: 0;
  opacity: 0;
  pointer-events: none;
}

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

:root {
  --bg: #1a1a1a;
  --bg-elevated: #1e1e1e;
  --bg-hover: #2a2a2a;
  --bg-active: #333;
  --fg: #e4e4e4;
  --fg-dim: #888;
  --fg-faint: #555;
  --accent: #7dd3c0;          
  --accent-plus: #e8b842;     
  --border: #2a2a2a;
  --border-strong: #3a3a3a;
  --danger: #e57373;
  --ui-font-delta: 0px;       
  --glow-color: transparent;
}

html[data-theme="green"]  { --accent:#39ff77; --accent-plus:#ffb000; --glow-color:#39ff77; }
html[data-theme="amber"]  { --accent:#ffb000; --accent-plus:#ff26b3; --glow-color:#ffb000; }
html[data-theme="red"]    { --accent:#ffc0b8; --accent-plus:#39ff77; --glow-color:#ff2020; }
html[data-theme="pink"]   { --accent:#ffc8f0; --accent-plus:#39ff77; --glow-color:#ff26b3; }
html[data-theme="cyber"]  { --accent:#B2FFCA; --accent-plus:#ff26b3; --glow-color:#39ff77; }

html[data-theme] .brand,
html[data-theme] .section-heading,
html[data-theme] .modal-body h3,
html[data-theme] .modal-body .app-name,
html[data-theme] .tier-badge {
  text-shadow: 0 0 8px var(--glow-color), 0 0 16px var(--glow-color);
}

html[data-size="S"]  { --ui-font-delta: 0px; }
html[data-size="M"]  { --ui-font-delta: 2px; }
html[data-size="L"]  { --ui-font-delta: 4px; }
html[data-size="XL"] { --ui-font-delta: 7px; }

html { background: var(--bg); }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans", "Yu Gothic UI", sans-serif;
  background: var(--bg);
  color: var(--fg);
  font-size: calc(13px + var(--ui-font-delta));
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.mono, code, .data-row dd, .endpoint-list li, .speed-detail {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.95em;
  letter-spacing: 0.01em;
}

header {
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-elevated);
  display: flex;
  align-items: center;
  gap: calc(10px + var(--ui-font-delta) / 2);
  position: sticky;
  top: 0;
  z-index: 50;
  flex-wrap: wrap;
}

.brand {
  font-weight: 700;
  letter-spacing: 1.5px;
  font-size: calc(13px + var(--ui-font-delta));
  color: var(--accent-plus);
  flex-shrink: 0;
}

.tier-badge {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: calc(10px + var(--ui-font-delta) / 2);
  letter-spacing: 0.12em;
  color: var(--accent-plus);
  border: 1px solid var(--accent-plus);
  border-radius: 3px;
  padding: 2px 8px;
  flex-shrink: 0;
}

header .header-spacer {
  flex: 1;
}

button {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--fg);
  padding: calc(6px + var(--ui-font-delta) / 3) calc(14px + var(--ui-font-delta) / 2);
  font-size: calc(12px + var(--ui-font-delta));
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.15s;
  font-family: inherit;
  white-space: nowrap;
  flex-shrink: 0;
}
button:hover:not(:disabled) {
  background: var(--bg-hover);
  border-color: var(--accent);
  color: var(--accent);
}
button:disabled { opacity: 0.4; cursor: not-allowed; }

button.primary {
  background: var(--accent);
  color: #111;
  border-color: var(--accent);
  font-weight: 600;
}
button.primary:hover:not(:disabled) {
  filter: brightness(1.1);
  color: #111;
}

button.subtle {
  font-size: calc(11px + var(--ui-font-delta));
  padding: calc(4px + var(--ui-font-delta) / 4) calc(10px + var(--ui-font-delta) / 3);
  border-color: var(--border-strong);
  color: var(--fg-dim);
}
button.subtle:hover:not(:disabled) {
  border-color: var(--accent);
  color: var(--accent);
}

#btn-lang {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  letter-spacing: 0.05em;
}

#btn-about {
  font-size: calc(15px + var(--ui-font-delta));
  padding: calc(2px + var(--ui-font-delta) / 4) calc(8px + var(--ui-font-delta) / 3);
  line-height: 1;
  color: var(--fg-dim);
}
#btn-about:hover:not(:disabled) {
  color: var(--accent);
  border-color: var(--accent);
}

main {
  flex: 1;
  width: 100%;
  max-width: 820px;
  margin: 0 auto;
  padding: 36px 24px 60px;
}

.section {
  margin-bottom: 40px;
}

.section-heading {
  font-size: calc(11px + var(--ui-font-delta));
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
  font-weight: 600;
}

.section-desc {
  color: var(--fg-dim);
  font-size: calc(12px + var(--ui-font-delta));
  margin-bottom: 16px;
  line-height: 1.6;
}

.transparency-panel {
  border: 1px solid var(--accent-plus);
  border-radius: 6px;
  padding: 18px 22px;
  background: rgba(232, 184, 66, 0.04);
  margin-bottom: 36px;
}

.transparency-title {
  font-size: calc(11px + var(--ui-font-delta));
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-plus);
  margin-bottom: 12px;
  font-weight: 600;
}

.transparency-panel dl {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 4px 16px;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: calc(11px + var(--ui-font-delta));
}

.transparency-panel dt {
  color: var(--fg-faint);
  text-transform: lowercase;
  letter-spacing: 0.06em;
}
.transparency-panel dd {
  color: var(--fg);
  word-break: break-all;
}

.action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
  align-items: center;
}

.status-text {
  color: var(--fg-dim);
  font-size: calc(11px + var(--ui-font-delta));
  margin-left: 4px;
}

.data-card {
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg-elevated);
  padding: 18px 22px;
  margin-bottom: 12px;
  min-height: 56px;
}

.data-empty {
  color: var(--fg-faint);
  font-size: calc(12px + var(--ui-font-delta));
  font-style: italic;
}

.data-error {
  color: var(--danger);
  font-size: calc(12px + var(--ui-font-delta));
  line-height: 1.6;
}

.data-card dl.data-rows {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 6px 18px;
  font-size: calc(12px + var(--ui-font-delta));
  align-items: baseline;
}

.data-card dt {
  color: var(--fg-dim);
  font-size: 0.9em;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.data-card dd {
  color: var(--fg);
  word-break: break-all;
  overflow-wrap: anywhere;
}

.data-card dd.accent { color: var(--accent); }

.data-card .group-sep {
  grid-column: 1 / -1;
  border-top: 1px dashed var(--border);
  margin: 8px 0 4px;
}

.speed-headline {
  font-size: calc(20px + var(--ui-font-delta));
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 6px;
  letter-spacing: 0.02em;
}
.speed-detail {
  color: var(--fg-dim);
  font-size: calc(11px + var(--ui-font-delta));
  line-height: 1.7;
}

.copy-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 4px;
}

footer.settings-bar {
  border-top: 1px solid var(--border);
  background: var(--bg-elevated);
  padding: 12px 20px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: calc(14px + var(--ui-font-delta) / 2);
  justify-content: center;
  font-size: calc(11px + var(--ui-font-delta));
  color: var(--fg-dim);
}

.setting-group {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

.setting-label {
  font-size: calc(10px + var(--ui-font-delta) / 2);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--fg-faint);
  margin-right: 4px;
}

.theme-dot {
  width: calc(16px + var(--ui-font-delta) / 2);
  height: calc(16px + var(--ui-font-delta) / 2);
  border-radius: 50%;
  border: 1px solid var(--border-strong);
  cursor: pointer;
  padding: 0;
  background: transparent;
  position: relative;
  transition: transform 0.12s, border-color 0.15s;
}
.theme-dot:hover { transform: scale(1.15); }
.theme-dot.active { border-color: var(--fg); box-shadow: 0 0 0 1px var(--fg); }

.theme-dot[data-theme="calm"]  { background: #7dd3c0; }
.theme-dot[data-theme="green"] { background: #39ff77; }
.theme-dot[data-theme="amber"] { background: #ffb000; }
.theme-dot[data-theme="red"]   { background: #ffc0b8; }
.theme-dot[data-theme="pink"]  { background: #ffc8f0; }
.theme-dot[data-theme="cyber"] { background: #B2FFCA; }

.size-btn {
  background: transparent;
  border: 1px solid var(--border-strong);
  color: var(--fg-dim);
  padding: 2px 8px;
  font-size: calc(10px + var(--ui-font-delta) / 2);
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  border-radius: 3px;
  cursor: pointer;
  transition: all 0.12s;
}
.size-btn:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); }
.size-btn.active { border-color: var(--accent); color: var(--accent); }

.version-tag {
  color: var(--fg-faint);
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: calc(10px + var(--ui-font-delta) / 2);
  letter-spacing: 0.05em;
}

.toast {
  position: fixed;
  bottom: 70px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--bg-elevated);
  border: 1px solid var(--accent);
  color: var(--accent);
  padding: 8px 16px;
  border-radius: 4px;
  font-size: calc(12px + var(--ui-font-delta));
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s, transform 0.2s;
  z-index: 200;
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding: 40px 16px;
  z-index: 100;
  overflow-y: auto;
}
.modal-backdrop.show { display: flex; }

.modal {
  background: var(--bg-elevated);
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  width: 100%;
  max-width: 640px;
  margin: auto;
  display: flex;
  flex-direction: column;
  max-height: calc(100vh - 80px);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.modal-title {
  font-size: calc(13px + var(--ui-font-delta));
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
}
.modal-close {
  background: transparent;
  border: none;
  color: var(--fg-dim);
  font-size: calc(20px + var(--ui-font-delta));
  cursor: pointer;
  line-height: 1;
  padding: 4px 10px;
}
.modal-close:hover { color: var(--accent); background: transparent; border-color: transparent; }

.modal-body {
  padding: 22px 24px 28px;
  overflow-y: auto;
  font-size: calc(12px + var(--ui-font-delta));
  line-height: 1.7;
}
.modal-body .app-name {
  font-size: calc(18px + var(--ui-font-delta));
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--accent-plus);
  margin-bottom: 4px;
}
.modal-body .version-line {
  color: var(--fg-dim);
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: calc(11px + var(--ui-font-delta));
  margin-bottom: 18px;
}
.modal-body h3 {
  font-size: calc(11px + var(--ui-font-delta));
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--accent);
  margin: 22px 0 8px;
  font-weight: 600;
}
.modal-body p { margin-bottom: 10px; }
.modal-body code {
  background: var(--bg);
  padding: 1px 6px;
  border-radius: 3px;
  border: 1px solid var(--border);
  color: var(--fg-dim);
}
.modal-body a { color: var(--accent); text-decoration: none; }
.modal-body a:hover { text-decoration: underline; }
.modal-body ul {
  padding-left: 20px;
  margin-bottom: 10px;
}
.modal-body ul li { margin-bottom: 4px; }
.modal-body .endpoint-list {
  list-style: none;
  padding-left: 0;
  border-left: 2px solid var(--accent-plus);
  padding: 6px 0 6px 14px;
  margin: 8px 0 14px;
}
.modal-body .author-line {
  color: var(--fg-dim);
  font-size: calc(11px + var(--ui-font-delta));
  margin-bottom: 8px;
}
.modal-body .license-text {
  white-space: pre-wrap;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: calc(10px + var(--ui-font-delta) / 2);
  color: var(--fg-dim);
  background: var(--bg);
  padding: 12px;
  border-radius: 4px;
  border: 1px solid var(--border);
  line-height: 1.5;
  max-height: 220px;
  overflow-y: auto;
}

.local-notice {
  border: 1px solid var(--accent);
  border-left-width: 3px;
  border-radius: 4px;
  padding: 10px 14px 12px;
  margin-bottom: 16px;
  font-size: calc(11px + var(--ui-font-delta));
  line-height: 1.7;
  color: var(--fg);
}
.local-notice strong { color: var(--accent); display: block; margin-bottom: 4px; }
.local-notice a { color: var(--accent); word-break: break-all; }
.local-notice a:hover { text-decoration: underline; }

@media (max-width: 540px) {
  main { padding: 24px 16px 48px; }
  .transparency-panel,
  .data-card { padding: 14px 16px; }
  .transparency-panel dl,
  .data-card dl.data-rows { grid-template-columns: 1fr; gap: 2px 0; }
  .transparency-panel dl dt,
  .data-card dt { color: var(--fg-faint); font-size: 0.85em; margin-top: 6px; }
  .transparency-panel dl dd:first-of-type,
  .data-card dd:first-of-type { margin-top: 0; }
  header { padding: 12px 14px; gap: 8px; }
  footer.settings-bar { padding: 10px 12px; gap: 12px; }
}