:root {
  --bg: #0a0a0a;
  --fg: #e8e8e8;
  --line: #222;
  --accent: #00eaff;
  --panel-bg: rgba(15, 15, 15, 0.88);
  --btn-bg: #141414;
  --btn-active: #00eaff;
  --btn-active-fg: #000;
  --qr-bg: #ffffff;
  --qr-fg: #000000;
  --qr-glow: transparent;
  --qr-size: 320px;
}

[data-theme="mono"]   { --qr-bg: #ffffff; --qr-fg: #000000; --qr-glow: transparent; }
[data-theme="invert"] { --qr-bg: #000000; --qr-fg: #ffffff; --qr-glow: transparent; }
[data-theme="green"]  { --qr-bg: #000000; --qr-fg: #00ff9c; --qr-glow: #00ff9c; }
[data-theme="amber"]  { --qr-bg: #000000; --qr-fg: #ffb400; --qr-glow: #ffb400; }
[data-theme="pink"]   { --qr-bg: #000000; --qr-fg: #ff4fbf; --qr-glow: #ff4fbf; }
[data-theme="cyber"]  { --qr-bg: #000000; --qr-fg: #00eaff; --qr-glow: #00eaff; }

[data-size="s"]  { --qr-size: 200px; }
[data-size="m"]  { --qr-size: 320px; }
[data-size="l"]  { --qr-size: 440px; }
[data-size="xl"] { --qr-size: min(90vw, 600px); }

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial,
               "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
  font-size: 14px;
  min-height: 100dvh;
  -webkit-tap-highlight-color: transparent;
}

.qr-main {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 24px 16px 260px;
  gap: 20px;
}

.qr-stage {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 16px;
  border-radius: 6px;
  background: var(--qr-bg);
  box-shadow: 0 0 24px 2px color-mix(in srgb, var(--qr-glow) 45%, transparent);
  transition: box-shadow 0.25s ease, background 0.2s ease;
}

.qr-box {
  width: var(--qr-size);
  height: var(--qr-size);
  display: flex;
  align-items: center;
  justify-content: center;
}

.qr-box svg {
  width: 100%;
  height: 100%;
  display: block;
}

.qr-box:empty::before {
  content: "";
  display: block;
  width: 100%;
  height: 100%;
  background:
    repeating-linear-gradient(45deg, #eee 0 8px, #f5f5f5 8px 16px);
  opacity: 0.3;
}

.qr-msg {
  color: #ff6b6b;
  font-size: 12px;
  margin-top: 8px;
  min-height: 1em;
  text-align: center;
  max-width: 300px;
}

.qr-msg[data-kind="ok"]  { color: #00eaff; }
.qr-msg[data-kind="err"] { color: #ff6b6b; }
.qr-msg[data-kind="info"]{ color: #cccccc; }

.ip-inline {
  display: flex;
  gap: 6px;
  align-items: stretch;
}

.ip-inline > input {
  flex: 1;
}

.ip-icon-btn {
  padding: 0 12px;
  background: var(--btn-bg);
  color: var(--fg);
  border: 1px solid var(--line);
  border-radius: 4px;
  cursor: pointer;
  font: inherit;
  font-size: 12px;
  white-space: nowrap;
  letter-spacing: 0.05em;
}

.ip-icon-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.ip-icon-btn[aria-pressed="true"] {
  border-color: var(--accent);
  color: var(--accent);
}

.inputs {
  width: min(100%, 560px);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.ip-header {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 8px;
  padding: 6px 10px;
  background: #101010;
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: 4px;
}

.ip-label-tag {
  font-size: 10px;
  letter-spacing: 0.15em;
  opacity: 0.5;
}

.ip-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.05em;
}

.ip-desc {
  font-size: 12px;
  opacity: 0.65;
  flex-basis: 100%;
}

.ip {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 10px;
  background: rgba(255, 255, 255, 0.015);
  border: 1px solid var(--line);
  border-left: 3px solid color-mix(in srgb, var(--accent) 60%, transparent);
  border-radius: 4px;
}

.ip[hidden] {
  display: none;
}

.ip input, .ip textarea {
  width: 100%;
  padding: 10px 12px;
  background: #111;
  color: var(--fg);
  border: 1px solid var(--line);
  border-radius: 4px;
  font: inherit;
  resize: vertical;
}

.ip input:focus, .ip textarea:focus {
  outline: 1px solid var(--accent);
  outline-offset: -1px;
}

.ip textarea {
  min-height: 70px;
  font-family: inherit;
}

.ip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  padding: 4px 2px;
}

.ip-row label {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  cursor: pointer;
  user-select: none;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin-top: 4px;
}

.actions button {
  padding: 8px 14px;
  background: var(--btn-bg);
  color: var(--fg);
  border: 1px solid var(--line);
  border-radius: 4px;
  cursor: pointer;
  font: inherit;
  letter-spacing: 0.05em;
  transition: border-color 0.15s, color 0.15s;
}

.actions button:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.actions button:active {
  transform: translateY(1px);
}

.actions button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.char-count {
  margin-left: auto;
  opacity: 0.6;
  font-variant-numeric: tabular-nums;
  font-size: 12px;
}

/* 設定パネル */
.panel {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--panel-bg);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-top: 1px solid var(--line);
  padding: 8px 12px calc(8px + env(safe-area-inset-bottom));
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-height: 50vh;
  overflow-y: auto;
  z-index: 10;
}

.panel-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}

.label {
  font-size: 11px;
  opacity: 0.5;
  letter-spacing: 0.1em;
  min-width: 52px;
}

.label-inline {
  margin-left: 12px;
}

.panel button {
  padding: 4px 10px;
  background: var(--btn-bg);
  color: var(--fg);
  border: 1px solid var(--line);
  border-radius: 3px;
  cursor: pointer;
  font: inherit;
  font-size: 12px;
  transition: border-color 0.15s, background 0.15s;
}

.panel button:hover {
  border-color: var(--accent);
}

.panel button.on {
  background: var(--btn-active);
  color: var(--btn-active-fg);
  border-color: var(--btn-active);
}

/* モーダル */
.modal-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 16px;
}

.modal-backdrop.open {
  display: flex;
}

.modal {
  background: #121212;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 20px 24px;
  max-width: 560px;
  width: 100%;
  max-height: 80vh;
  overflow-y: auto;
  position: relative;
}

.modal h2 {
  margin-top: 0;
  margin-bottom: 4px;
}

.modal h3 {
  margin-top: 18px;
  font-size: 13px;
  letter-spacing: 0.1em;
  opacity: 0.7;
}

.modal p {
  line-height: 1.6;
}

.modal code {
  background: #0a0a0a;
  padding: 1px 6px;
  border-radius: 3px;
  font-size: 12px;
}

.modal pre {
  background: #0a0a0a;
  padding: 10px;
  border-radius: 4px;
  font-size: 11px;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
  line-height: 1.5;
}

.modal a {
  color: var(--accent);
}

.modal-close {
  position: absolute;
  top: 12px;
  right: 12px;
  background: var(--btn-bg);
  color: var(--fg);
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 4px 10px;
  cursor: pointer;
  font: inherit;
  font-size: 12px;
}

.modal-close:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.modal-version {
  opacity: 0.5;
  font-size: 12px;
  margin-top: 0;
}

.modal-hint {
  opacity: 0.8;
  font-size: 12px;
}

/* スクロールバー（webkit） */
.panel::-webkit-scrollbar,
.modal::-webkit-scrollbar { width: 6px; }
.panel::-webkit-scrollbar-thumb,
.modal::-webkit-scrollbar-thumb { background: #333; border-radius: 3px; }

/* 縮小表示時の微調整 */
@media (max-width: 480px) {
  .qr-main { padding: 16px 12px 280px; }
  .panel { padding: 6px 10px calc(6px + env(safe-area-inset-bottom)); }
  .label { min-width: 44px; }
}