:root {
  color-scheme: light dark;
  --bg: #f3f5f2;
  --card: #ffffff;
  --ink: #1b1f1d;
  --muted: #5b655f;
  --line: #d3d9d4;
  --line-strong: #aab3ac;
  --field: #ffffff;
  --accent: #1f6f4a;
  --accent-ink: #ffffff;
  --accent-soft: #e4f1ea;
  --danger: #b3261e;
  --danger-soft: #fbe9e7;
  --code-bg: #f0f3f0;
  --focus: #1f6f4a;
  --shadow: 0 1px 2px rgba(20, 30, 25, 0.06), 0 6px 20px rgba(20, 30, 25, 0.05);
  --radius: 10px;
  --mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, "BIZ UDGothic", "Noto Sans Mono CJK JP", monospace;
}

:root[data-theme="dark"] {
  --bg: #111513;
  --card: #1a201d;
  --ink: #e6ebe7;
  --muted: #a3ada6;
  --line: #2d3531;
  --line-strong: #4a554f;
  --field: #141917;
  --accent: #5fd39a;
  --accent-ink: #0b1a12;
  --accent-soft: #1d3328;
  --danger: #ff8a80;
  --danger-soft: #3a1f1d;
  --code-bg: #10231a;
  --focus: #7ee2b0;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 6px 20px rgba(0, 0, 0, 0.3);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #111513;
    --card: #1a201d;
    --ink: #e6ebe7;
    --muted: #a3ada6;
    --line: #2d3531;
    --line-strong: #4a554f;
    --field: #141917;
    --accent: #5fd39a;
    --accent-ink: #0b1a12;
    --accent-soft: #1d3328;
    --danger: #ff8a80;
    --danger-soft: #3a1f1d;
    --code-bg: #10231a;
    --focus: #7ee2b0;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 6px 20px rgba(0, 0, 0, 0.3);
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, "Hiragino Sans", "Yu Gothic UI", Meiryo, "Noto Sans JP", sans-serif;
}

code {
  font-family: var(--mono);
  font-size: 0.92em;
  background: var(--code-bg);
  padding: 0.05em 0.35em;
  border-radius: 4px;
}

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  margin: -1px; padding: 0; border: 0;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap;
}

.skip {
  position: absolute;
  left: 12px;
  top: -100px;
  z-index: 40;
  padding: 8px 12px;
  background: var(--accent);
  color: var(--accent-ink);
  border-radius: 8px;
  font-weight: 700;
  text-decoration: none;
}
.skip:focus { top: 12px; }

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

/* Header */
.top {
  background: var(--card);
  border-bottom: 1px solid var(--line);
}
.top-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 16px 20px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.brand { display: flex; gap: 14px; align-items: flex-start; min-width: 0; }
.mark { width: 44px; height: 44px; flex: none; }
.top h1 { margin: 0; font-size: 1.3rem; line-height: 1.25; font-weight: 800; letter-spacing: -0.01em; }
.tagline { margin: 4px 0 0; color: var(--muted); font-size: 0.9rem; max-width: 62ch; }
.top-tools { display: flex; gap: 10px; align-items: center; flex: none; }

/* Buttons */
button {
  font: inherit;
  color: inherit;
  cursor: pointer;
  border-radius: 8px;
  border: 1px solid var(--line-strong);
  background: var(--field);
  padding: 8px 14px;
  min-height: 40px;
  line-height: 1.2;
}
button:hover { border-color: var(--accent); }
button:disabled { opacity: 0.5; cursor: default; }
.btn-sub { font-weight: 600; white-space: nowrap; }
.icon-btn { width: 40px; padding: 0; display: inline-grid; place-items: center; }
.icon { width: 20px; height: 20px; display: block; }
.icon-sun { display: none; }
:root[data-theme="dark"] .icon-sun { display: block; }
:root[data-theme="dark"] .icon-moon { display: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .icon-sun { display: block; }
  :root:not([data-theme="light"]) .icon-moon { display: none; }
}

/* Segmented controls */
.seg {
  display: inline-flex;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  overflow: hidden;
  background: var(--field);
}
.seg > button, .seg > label {
  border: 0;
  border-radius: 0;
  background: transparent;
  min-height: 40px;
  padding: 8px 14px;
  font-weight: 600;
  color: var(--muted);
  margin: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex: 1 1 0;
}
.seg > button + button, .seg > label:not(:first-of-type) { border-left: 1px solid var(--line); }
.seg > button[aria-pressed="true"], .seg > input:checked + label {
  background: var(--accent);
  color: var(--accent-ink);
}
.seg > input { position: absolute; opacity: 0; width: 1px; height: 1px; pointer-events: none; }
.seg > input:focus-visible + label { outline: 3px solid var(--focus); outline-offset: -3px; }
.seg-small > button { min-height: 36px; padding: 6px 12px; font-size: 0.9rem; }
.seg-field { border: 0; padding: 0; margin: 0; min-width: 0; }
.seg-field legend { padding: 0; }
.seg-field .seg { display: flex; width: 100%; }

/* Layout */
.layout {
  max-width: 1180px;
  margin: 0 auto;
  padding: 20px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
  align-items: start;
}
@media (min-width: 960px) {
  .layout { grid-template-columns: minmax(0, 11fr) minmax(0, 10fr); }
  .output { position: sticky; top: 16px; }
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px 20px;
}

/* Form */
.group { border: 0; padding: 0; margin: 0 0 20px; min-width: 0; }
.group:last-of-type { margin-bottom: 8px; }
.group > legend {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 0;
  margin-bottom: 10px;
}
.row { display: grid; gap: 14px; }
.row-host { grid-template-columns: minmax(0, 1fr) minmax(0, 120px); }
.row-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); margin-top: 12px; }
.field { margin: 0 0 14px; min-width: 0; }
.field:last-child { margin-bottom: 0; }
label, legend { display: block; font-weight: 600; font-size: 0.9rem; margin: 0 0 6px; }
.label-row { display: flex; justify-content: space-between; align-items: baseline; gap: 8px; }
.count { font-size: 0.8rem; color: var(--muted); font-variant-numeric: tabular-nums; }

input, select {
  font: inherit;
  width: 100%;
  min-height: 42px;
  padding: 8px 12px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: var(--field);
  color: var(--ink);
}
input:focus-visible, select:focus-visible { outline-offset: 0; border-color: var(--focus); }
input[aria-invalid="true"] { border-color: var(--danger); box-shadow: 0 0 0 3px var(--danger-soft); }
input::placeholder { color: color-mix(in srgb, var(--muted) 75%, transparent); }
input[inputmode="url"], #streamid, #passphrase, #mediamtx-path { font-family: var(--mono); font-size: 0.95rem; }
input[type="number"] { font-variant-numeric: tabular-nums; }

.help { margin: 6px 0 0; font-size: 0.82rem; color: var(--muted); }
.error { margin: 4px 0 0; font-size: 0.82rem; color: var(--danger); font-weight: 600; }
.error:empty { display: none; }

.latency-row { display: grid; grid-template-columns: minmax(0, 150px) minmax(0, 1fr); gap: 10px; align-items: center; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  min-height: 32px;
  padding: 4px 10px;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: 999px;
  font-variant-numeric: tabular-nums;
}
.chip[aria-pressed="true"] { background: var(--accent-soft); border-color: var(--accent); color: var(--ink); }

.pass { display: grid; grid-template-columns: minmax(0, 1fr) auto auto; gap: 8px; }

.advanced { margin-top: 4px; border-top: 1px dashed var(--line); padding-top: 10px; }
.advanced summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--accent);
  list-style: none;
  display: flex;
  align-items: center;
  gap: 6px;
  min-height: 32px;
}
.advanced summary::-webkit-details-marker { display: none; }
.advanced summary::before {
  content: "";
  width: 8px; height: 8px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(-45deg);
  transition: transform 0.15s ease;
  margin-left: 2px;
}
.advanced[open] summary::before { transform: rotate(45deg); }

.form-actions { display: flex; justify-content: flex-end; margin-top: 12px; }

/* Output */
.output h2 { margin: 0 0 12px; font-size: 1.05rem; }
.tabs {
  display: flex;
  gap: 4px;
  border-bottom: 1px solid var(--line);
  margin: 0 0 14px;
  overflow-x: auto;
  scrollbar-width: none;
}
.tabs::-webkit-scrollbar { display: none; }
.tabs [role="tab"] {
  border: 0;
  border-bottom: 3px solid transparent;
  border-radius: 6px 6px 0 0;
  background: transparent;
  color: var(--muted);
  font-weight: 600;
  padding: 8px 12px;
  margin-bottom: -1px;
  white-space: nowrap;
  min-height: 42px;
}
.tabs [role="tab"]:hover { color: var(--ink); background: var(--accent-soft); }
.tabs [role="tab"][aria-selected="true"] { color: var(--accent); border-bottom-color: var(--accent); }
.panel[hidden] { display: none; }
.panel > .help { margin: 0 0 12px; }
.empty {
  margin: 0 0 12px;
  padding: 12px 14px;
  border: 1px dashed var(--line-strong);
  border-radius: 8px;
  color: var(--muted);
  font-size: 0.9rem;
}
.empty[hidden] { display: none; }

.out { margin-top: 12px; }
.out[hidden] { display: none; }
.out + .out { margin-top: 18px; }
.out-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 6px; }
.out-title { font-weight: 700; font-size: 0.9rem; }
.out .help { margin: 0 0 6px; }
.btn-copy {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--accent);
  color: var(--accent-ink);
  border-color: var(--accent);
  font-weight: 700;
  padding: 6px 14px;
  min-height: 38px;
}
.btn-copy:hover { filter: brightness(1.08); }
.btn-copy.is-copied { background: var(--accent-soft); color: var(--ink); border-color: var(--accent); }
.uri {
  margin: 0;
  padding: 12px 14px;
  background: var(--code-bg);
  border: 1px solid var(--line);
  border-radius: 8px;
  font-family: var(--mono);
  font-size: 0.9rem;
  line-height: 1.5;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  word-break: break-all;
  min-height: 3.2em;
  user-select: all;
  -webkit-user-select: all;
}

/* Footer */
.foot {
  max-width: 1180px;
  margin: 0 auto;
  padding: 4px 20px 32px;
  color: var(--muted);
  font-size: 0.82rem;
}
.foot p { margin: 4px 0; }

/* Toast */
.toast {
  position: fixed;
  left: 50%;
  bottom: 20px;
  z-index: 30;
  padding: 10px 18px;
  border-radius: 999px;
  font-weight: 700;
  background: var(--ink);
  color: var(--bg);
  box-shadow: var(--shadow);
  transform: translate(-50%, 140%);
  opacity: 0;
  transition: transform 0.18s ease, opacity 0.18s ease;
  pointer-events: none;
  max-width: calc(100vw - 32px);
}
.toast.show { transform: translate(-50%, 0); opacity: 1; }
.toast.bad { background: var(--danger); color: #fff; }

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}

/* Mobile */
@media (max-width: 640px) {
  .top-inner { padding: 14px 16px; }
  .top h1 { font-size: 1.15rem; }
  .tagline { font-size: 0.85rem; }
  .layout { padding: 14px; gap: 14px; }
  .card { padding: 16px 14px; }
  .row-host { grid-template-columns: minmax(0, 1fr) minmax(0, 104px); }
  .row-2 { grid-template-columns: minmax(0, 1fr); }
  .latency-row { grid-template-columns: minmax(0, 1fr); }
  .pass { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .pass input { grid-column: 1 / -1; }
  .seg-field .seg > label { padding: 8px 6px; font-size: 0.9rem; }
  input, select { font-size: 16px; } /* prevents iOS zoom on focus */
  .btn-copy { padding: 6px 12px; }
  .foot { padding: 0 16px 28px; }
  .tabs { flex-wrap: wrap; gap: 2px 4px; }
  .tabs [role="tab"] { padding: 8px 10px; font-size: 0.92rem; }
}

/* Quick-copy bar: single column layouts only, hidden while the output card is on screen */
.quick {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  z-index: 20;
  display: none;
  gap: 10px;
  padding: 10px 14px calc(10px + env(safe-area-inset-bottom));
  background: var(--card);
  border-top: 1px solid var(--line);
  box-shadow: 0 -6px 20px rgba(0, 0, 0, 0.08);
}
.quick .btn-copy { flex: 1 1 auto; justify-content: center; }
.quick .btn-sub {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  min-height: 40px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  color: var(--ink);
  text-decoration: none;
}
@media (max-width: 959px) {
  .quick.is-visible { display: flex; }
  body.has-quick { padding-bottom: 72px; }
}