/* Layout: one working column. The question sits on top and a vertical route map below shows which free service is next. */
:root {
  --bg: #e9f0ee;
  --surface: #fbfdfc;
  --ink: #14251f;
  --muted: #52665f;
  --line: #b9cbc4;
  --accent: #006b5b;
  --on-accent: #ffffff;
  --accent-soft: #d3e9e2;
  --warn: #8a4b00;
  --warn-soft: #f6e4c8;
  --font-display: "ZCOOL QingKe HuangYou", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f1a17; --surface: #17241f; --ink: #e6f0ec; --muted: #a0b4ac; --line: #35483f;
    --accent: #5fd0b5; --on-accent: #06211a; --accent-soft: #1e3e35; --warn: #f0bd78; --warn-soft: #43301a;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0f1a17; --surface: #17241f; --ink: #e6f0ec; --muted: #a0b4ac; --line: #35483f;
  --accent: #5fd0b5; --on-accent: #06211a; --accent-soft: #1e3e35; --warn: #f0bd78; --warn-soft: #43301a;
  color-scheme: dark;
}
* { box-sizing: border-box; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
}
.wrap {
  max-width: 680px;
  margin: 0 auto;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
  padding-block: 36px 48px;
  display: grid;
  gap: 28px;
}
header { display: grid; gap: 6px; }
h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(2.4rem, 9vw, 3.4rem);
  line-height: 1.05;
  letter-spacing: .02em;
  text-wrap: balance;
}
header p { margin: 0; color: var(--muted); }
.tabs { display: flex; flex-wrap: wrap; gap: 8px; }
.tab {
  min-height: 42px;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: transparent;
  color: var(--ink);
  font: inherit;
  font-weight: 500;
  cursor: pointer;
}
.tab:hover { border-color: var(--accent); }
.tab[aria-pressed="true"] { border-color: var(--accent); background: var(--accent-soft); font-weight: 700; }
.tab:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.ask { display: grid; gap: 12px; }
.ask-head { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; flex-wrap: wrap; }
label { font-weight: 700; }
#example-note { color: var(--muted); font-size: .875rem; }
textarea {
  width: 100%;
  min-height: 132px;
  padding: 14px;
  resize: vertical;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
  color: var(--ink);
  font: inherit;
}
.actions { display: flex; gap: 10px; flex-wrap: wrap; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 10px 18px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: transparent;
  color: var(--ink);
  font: inherit;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
}
.btn:hover { border-color: var(--accent); }
.btn.primary {
  flex: 1 1 260px;
  border-color: var(--accent);
  background: var(--accent);
  color: var(--on-accent);
  font-weight: 700;
}
.btn.primary:hover { filter: brightness(1.08); }
.btn.small { min-height: 38px; padding: 6px 12px; font-size: .875rem; }
.btn:focus-visible, textarea:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
#status {
  min-height: 1.6em;
  margin: 0;
  color: var(--muted);
  font-size: .9375rem;
}
.route { display: grid; gap: 10px; }
h2 { margin: 0; font-size: 1rem; }
ol { list-style: none; margin: 0; padding: 0; }
.stop {
  position: relative;
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr) auto;
  gap: 4px 12px;
  align-items: center;
  padding-block: 14px;
}
.stop::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--line);
}
.stop:first-child::before { top: 50%; }
.stop:last-child::before { bottom: 50%; }
.dot {
  position: relative;
  width: 24px;
  height: 24px;
  border: 2px solid var(--line);
  border-radius: 50%;
  background: var(--bg);
}
.stop.current .dot { border-color: var(--accent); background: var(--accent); box-shadow: inset 0 0 0 5px var(--bg); }
.stop.used .dot { border-color: var(--warn); background: var(--warn-soft); }
.info { min-width: 0; }
.name-row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.name { font-weight: 700; font-size: 1.0625rem; }
.pill {
  padding: 1px 8px;
  border-radius: 4px;
  background: var(--accent-soft);
  color: var(--ink);
  font-size: .75rem;
  font-weight: 500;
  letter-spacing: .02em;
}
.stop.used .pill { background: var(--warn-soft); color: var(--warn); }
.note { color: var(--muted); font-size: .875rem; }
.row-actions { display: flex; gap: 8px; }
.foot { margin: 0; padding-top: 16px; border-top: 1px solid var(--line); color: var(--muted); font-size: .875rem; }
[hidden] { display: none !important; }
.media { display: grid; gap: 12px; }
.section-note { margin: 0; color: var(--muted); font-size: .875rem; }
.drop {
  display: grid;
  justify-items: center;
  gap: 2px;
  padding: 22px 16px;
  border: 2px dashed var(--line);
  border-radius: 6px;
  background: var(--surface);
  text-align: center;
  cursor: pointer;
}
.drop:hover, .drop.over { border-color: var(--accent); }
.drop:focus-within { outline: 3px solid var(--accent); outline-offset: 2px; }
.drop strong { font-weight: 700; }
.drop span { color: var(--muted); font-size: .875rem; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); }
.files { display: grid; grid-template-columns: repeat(auto-fill, minmax(112px, 1fr)); gap: 10px; }
.file { display: grid; gap: 6px; min-width: 0; font-size: .75rem; color: var(--muted); }
.thumb {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--accent-soft);
}
.file-name { overflow-wrap: anywhere; }
.remove {
  justify-self: start;
  padding: 0;
  border: 0;
  background: none;
  color: var(--accent);
  font: inherit;
  text-decoration: underline;
  cursor: pointer;
}
.btn:disabled { opacity: .5; cursor: not-allowed; }
#analyze { flex: 1 1 220px; }
#result {
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}
@media (max-width: 480px) {
  .wrap { padding-block: 24px 36px; }
  .stop { grid-template-columns: 24px minmax(0, 1fr); }
  .row-actions { grid-column: 2; flex-wrap: wrap; }
  .btn.primary, #switch { flex: 1 1 100%; }
}
.format { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.format label { font-weight: 500; }
select {
  min-height: 42px;
  padding: 6px 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
  color: var(--ink);
  font: inherit;
}
.btn:disabled { opacity: .6; cursor: progress; }
.output { display: grid; gap: 14px; padding-top: 4px; }
.output-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.result-media { display: flex; flex-wrap: wrap; gap: 14px; align-items: flex-start; }
.preview {
  display: block;
  max-width: min(100%, 320px);
  max-height: 560px;
  height: auto;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #000;
}
#result-text {
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  overflow-x: auto;
}
details { display: grid; gap: 10px; }
summary { font-weight: 700; cursor: pointer; padding-block: 8px; }
summary:focus-visible, select:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.tool-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
  padding-block: 12px;
  border-top: 1px solid var(--line);
}
.drop { padding-block: 16px; }
.foot { padding-top: 16px; }
.lang-switch { display: flex; flex-wrap: wrap; gap: 4px; justify-self: start; }
.lang-btn { min-height: 34px; padding: 4px 10px; border: 0; border-radius: 4px; background: transparent; color: var(--muted); font: inherit; font-size: .875rem; cursor: pointer; }
.lang-btn:hover { color: var(--ink); }
.lang-btn[aria-pressed="true"] { background: var(--accent-soft); color: var(--ink); font-weight: 700; }
.lang-btn:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.chat { display: grid; gap: 12px; }
.chat-log { display: flex; flex-direction: column; gap: 16px; max-height: 62vh; overflow-y: auto; padding-right: 4px; }
.msg { display: grid; gap: 8px; min-width: 0; }
.msg.user { align-self: flex-end; max-width: 85%; padding: 10px 14px; border-radius: 6px; background: var(--accent-soft); }
.msg.assistant { align-self: stretch; }
.msg-text { white-space: pre-wrap; overflow-wrap: anywhere; }
.msg.assistant > div:first-child { display: grid; gap: 10px; min-width: 0; }
.msg-files { color: var(--muted); font-size: .8125rem; overflow-wrap: anywhere; }
.msg-tools { display: flex; gap: 14px; font-size: .8125rem; }
.code-wrap { min-width: 0; border: 1px solid var(--line); border-radius: 6px; background: var(--surface); overflow: hidden; }
.code-head { display: flex; justify-content: space-between; gap: 12px; padding: 6px 12px; border-bottom: 1px solid var(--line); color: var(--muted); font-size: .8125rem; }
.code-wrap pre { margin: 0; padding: 12px; overflow-x: auto; font-family: Consolas, Menlo, monospace; font-size: .875rem; line-height: 1.5; }
.ask.chat-mode textarea { min-height: 76px; }
.ask.chat-mode .drop { justify-items: start; padding: 8px 12px; border-width: 1px; text-align: left; }
.ask.chat-mode .drop span { display: none; }
.tool-group { padding-block: 16px 6px; font-weight: 700; color: var(--accent); }

#gate { display: grid; gap: 16px; max-width: 420px; margin: 0 auto; padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); padding-block: 48px; }
.gate-form { display: grid; gap: 12px; }
.gate-field { display: grid; gap: 4px; }
.gate-field input { min-height: 44px; padding: 8px 12px; border: 1px solid var(--line); border-radius: 6px; background: var(--surface); color: var(--ink); font: inherit; }
.gate-field input:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.gate-message { min-height: 1.4em; margin: 0; color: var(--warn); font-size: .9375rem; }
#account-bar { display: flex; flex-wrap: wrap; gap: 8px 14px; align-items: center; color: var(--muted); font-size: .875rem; }
.account-info { flex: 1 1 220px; min-width: 0; }
.modal-shade { position: fixed; inset: 0; z-index: 20; display: grid; place-items: start center; padding: 24px 16px; overflow-y: auto; background: rgba(0, 0, 0, .45); }
.modal { display: grid; gap: 16px; width: min(100%, 720px); padding: 20px; border-radius: 6px; background: var(--bg); }
.modal h3 { margin: 0; font-size: 1rem; }
.table-wrap { overflow-x: auto; }
.modal table { width: 100%; border-collapse: collapse; font-size: .875rem; }
.modal th, .modal td { padding: 8px; border-bottom: 1px solid var(--line); text-align: left; white-space: nowrap; }
.table-actions { display: flex; gap: 10px; }