:root {
  --bg: #081321;
  --panel: rgba(11, 24, 38, 0.84);
  --panel-strong: rgba(8, 19, 30, 0.92);
  --line: rgba(145, 201, 239, 0.25);
  --line-strong: rgba(160, 213, 245, 0.45);
  --text: #eaf5ff;
  --muted: #9ebed5;
  --brand: #2d8cf0;
  --brand-soft: #8fd3ff;
  --accent: #f7b852;
  --ok: #69cf9d;
  --shadow: 0 24px 64px rgba(2, 9, 16, 0.38);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  color: var(--text);
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  background:
    radial-gradient(circle at 8% 16%, rgba(60, 150, 224, 0.24) 0%, transparent 36%),
    radial-gradient(circle at 90% 10%, rgba(247, 184, 82, 0.14) 0%, transparent 38%),
    radial-gradient(circle at 80% 86%, rgba(98, 175, 233, 0.16) 0%, transparent 40%),
    linear-gradient(160deg, #0b1b2c 0%, #09121f 48%, #050a13 100%);
  padding: 22px;
}

.icon-sprite {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

.orb {
  position: fixed;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  filter: blur(64px);
  pointer-events: none;
  z-index: -1;
}

.orb-a {
  top: -90px;
  right: -70px;
  background: rgba(57, 183, 255, 0.22);
}

.orb-b {
  left: -60px;
  bottom: 12%;
  background: rgba(247, 184, 82, 0.19);
}

.hero,
.workspace,
.footer {
  max-width: 1440px;
  margin: 0 auto;
}

.hero {
  border: 1px solid var(--line-strong);
  border-radius: 26px;
  background:
    linear-gradient(145deg, rgba(11, 29, 46, 0.88) 0%, rgba(8, 21, 34, 0.92) 100%),
    radial-gradient(circle at 88% -30%, rgba(143, 211, 255, 0.22) 0%, transparent 50%);
  box-shadow: var(--shadow);
  padding: 24px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  top: 0;
  height: 2px;
  background: linear-gradient(90deg, rgba(143, 211, 255, 0.1) 0%, rgba(143, 211, 255, 0.8) 44%, rgba(247, 184, 82, 0.55) 100%);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  text-decoration: none;
  color: var(--muted);
  border: 1px solid rgba(145, 201, 239, 0.34);
  border-radius: 999px;
  padding: 6px 10px;
  font-size: 0.85rem;
  background: rgba(7, 16, 26, 0.55);
}

.back-link svg {
  width: 14px;
  height: 14px;
}

.hero h1 {
  margin: 14px 0 10px;
  font-family: "Sora", "Noto Sans SC", sans-serif;
  font-size: clamp(1.8rem, 3.8vw, 2.6rem);
  display: flex;
  align-items: center;
  gap: 10px;
}

.title-icon {
  width: 34px;
  height: 34px;
  padding: 8px;
  border: 1px solid rgba(145, 201, 239, 0.45);
  border-radius: 10px;
  background: rgba(7, 20, 32, 0.66);
  color: var(--brand-soft);
}

.hero p {
  margin: 0;
  max-width: 940px;
  color: var(--muted);
  line-height: 1.65;
}

.hero a {
  color: var(--brand-soft);
}

.hero-actions {
  margin-top: 14px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.workspace {
  margin-top: 16px;
  display: grid;
  grid-template-columns: 1.12fr 0.72fr 1.16fr;
  gap: 14px;
}

.panel {
  border: 1px solid var(--line);
  border-radius: 20px;
  background: linear-gradient(160deg, var(--panel) 0%, var(--panel-strong) 100%);
  box-shadow: var(--shadow);
  padding: 14px;
  display: grid;
  align-content: start;
  gap: 12px;
  min-height: 680px;
}

.panel h2 {
  margin: 0;
  font-family: "Sora", "Noto Sans SC", sans-serif;
  font-size: 1.02rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.panel h2 svg {
  width: 16px;
  height: 16px;
  color: var(--brand-soft);
}

.panel h3 {
  margin: 0;
  font-family: "Sora", "Noto Sans SC", sans-serif;
  color: var(--brand-soft);
  font-size: 0.94rem;
  display: flex;
  align-items: center;
  gap: 7px;
}

.panel h3 svg {
  width: 14px;
  height: 14px;
}

textarea,
select,
input[type="color"],
input[type="range"] {
  width: 100%;
  font: inherit;
}

label {
  display: grid;
  gap: 6px;
  font-size: 0.86rem;
  color: var(--muted);
}

#markdownInput {
  min-height: 560px;
  resize: vertical;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(6, 16, 25, 0.76);
  color: #e7f4ff;
  padding: 12px;
  line-height: 1.68;
  font-family: "JetBrains Mono", "SFMono-Regular", Menlo, Consolas, monospace;
  font-size: 0.9rem;
}

#markdownInput:focus {
  outline: 2px solid rgba(57, 183, 255, 0.34);
  border-color: rgba(57, 183, 255, 0.58);
}

.editor-meta {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  font-size: 0.8rem;
  color: var(--muted);
}

.control-grid {
  display: grid;
  gap: 10px;
}

select,
input[type="color"] {
  border: 1px solid rgba(145, 201, 239, 0.28);
  border-radius: 11px;
  padding: 9px 10px;
  background: rgba(7, 16, 27, 0.78);
  color: #e6f5ff;
}

input[type="color"] {
  height: 40px;
  padding: 4px;
}

input[type="range"] {
  accent-color: var(--brand);
}

.toggles {
  border: 1px solid rgba(145, 201, 239, 0.2);
  border-radius: 12px;
  padding: 10px;
  display: grid;
  gap: 8px;
  background: rgba(5, 13, 22, 0.56);
}

.toggle-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.86rem;
}

.toggle-item input {
  width: 15px;
  height: 15px;
  accent-color: var(--ok);
}

.actions {
  display: grid;
  gap: 8px;
}

.remix-box {
  border: 1px solid rgba(145, 201, 239, 0.22);
  border-radius: 13px;
  padding: 10px;
  display: grid;
  gap: 8px;
  background: rgba(4, 11, 19, 0.64);
}

#remixPromptOutput {
  min-height: 150px;
  resize: vertical;
  border: 1px solid rgba(145, 201, 239, 0.24);
  border-radius: 11px;
  background: rgba(6, 17, 28, 0.78);
  color: #deeffe;
  padding: 10px;
  line-height: 1.6;
  font-size: 0.84rem;
}

.preview-shell {
  border: 1px solid rgba(145, 201, 239, 0.22);
  border-radius: 16px;
  background: rgba(4, 12, 20, 0.58);
  padding: 12px;
  min-height: 586px;
  overflow: auto;
}

.platform-hint {
  margin: -2px 0 0;
  font-size: 0.82rem;
  color: var(--muted);
}

.md-render {
  --md-accent: #2d8cf0;
  --md-font-size: 16px;
  --md-line-height: 1.75;
  --md-width: 760px;
  max-width: min(var(--md-width), 100%);
  margin: 0 auto;
  padding: 18px;
  border-radius: 14px;
  background: #fff;
  color: #1f2d3d;
  font-size: var(--md-font-size);
  line-height: var(--md-line-height);
  word-break: break-word;
}

.md-render h1,
.md-render h2,
.md-render h3,
.md-render h4,
.md-render h5,
.md-render h6 {
  font-family: "Sora", "Noto Sans SC", sans-serif;
  line-height: 1.36;
  color: #0f2235;
}

.md-render h1 {
  border-bottom: 2px solid color-mix(in srgb, var(--md-accent) 40%, #d4e5f4 60%);
  padding-bottom: 0.35em;
}

.md-render h2 {
  border-left: 4px solid var(--md-accent);
  padding-left: 0.58em;
  margin-top: 1.8em;
}

.md-render p {
  margin: 0.95em 0;
}

.md-render blockquote {
  margin: 1em 0;
  border-left: 4px solid color-mix(in srgb, var(--md-accent) 62%, #bcd9ef 38%);
  background: #f6fbff;
  padding: 0.6em 0.85em;
  border-radius: 0 8px 8px 0;
  color: #33506a;
}

.md-render a {
  color: #1f74c9;
}

.md-render img {
  display: block;
  max-width: 100%;
  margin: 1.1em auto;
  border-radius: 8px;
}

.md-render.img-card-mode img {
  border: 1px solid #d2e6f6;
  box-shadow: 0 10px 26px rgba(22, 56, 83, 0.18);
}

.md-render code {
  font-family: "JetBrains Mono", Menlo, Consolas, monospace;
  background: #f1f5f9;
  padding: 0.16em 0.34em;
  border-radius: 5px;
  font-size: 0.92em;
}

.md-render pre {
  overflow: auto;
  background: #0f172a;
  color: #e8ecf1;
  border-radius: 10px;
  padding: 0.9em;
}

.md-render pre code {
  background: transparent;
  color: inherit;
  padding: 0;
}

.md-render table {
  border-collapse: collapse;
  width: 100%;
  margin: 1em 0;
  font-size: 0.95em;
}

.md-render th,
.md-render td {
  border: 1px solid #d3e2ef;
  padding: 0.5em 0.65em;
  text-align: left;
}

.md-render thead {
  background: #f1f7fc;
}

.md-render .md-link-refs {
  margin-top: 2em;
  border-top: 1px dashed #cbd9e4;
  padding-top: 1em;
  color: #516274;
  font-size: 0.9em;
}

.md-render .md-link-refs h3 {
  margin: 0 0 0.6em;
  font-family: "Sora", "Noto Sans SC", sans-serif;
  font-size: 1em;
  color: #1e3952;
}

.md-render.theme-wechat {
  --md-accent: #1464cb;
  background: #fdfefe;
}

.md-render.theme-blog {
  --md-accent: #a041f0;
  background: #fcfbff;
}

.md-render.theme-knowledge {
  --md-accent: #0c9b7c;
  background: #fbfffd;
}

.md-render.theme-sunrise {
  --md-accent: #e76f51;
  background: #fffdfa;
}

.btn {
  border: 0;
  border-radius: 999px;
  padding: 9px 13px;
  font: inherit;
  font-size: 0.88rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  text-decoration: none;
  transition: transform 0.2s ease, filter 0.2s ease, box-shadow 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
  filter: saturate(1.06);
}

.btn svg {
  width: 14px;
  height: 14px;
}

.btn-primary {
  color: #07243a;
  background: linear-gradient(120deg, #72c9ff 0%, #4da1ff 100%);
  box-shadow: 0 11px 24px rgba(74, 161, 255, 0.24);
}

.btn-secondary {
  color: #eaf5ff;
  background: rgba(12, 33, 50, 0.88);
  border: 1px solid rgba(145, 201, 239, 0.35);
}

.btn-ghost {
  color: var(--muted);
  background: transparent;
  border: 1px dashed rgba(145, 201, 239, 0.42);
}

.footer {
  margin-top: 14px;
  border: 1px solid rgba(145, 201, 239, 0.24);
  border-radius: 16px;
  padding: 10px 14px;
  background: rgba(7, 16, 26, 0.62);
  display: grid;
  gap: 6px;
}

.footer p {
  margin: 0;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 0.84rem;
  color: var(--muted);
}

.footer svg {
  width: 14px;
  height: 14px;
  color: var(--brand-soft);
  flex: none;
}

.footer a {
  color: var(--brand-soft);
}

@media (max-width: 1240px) {
  .workspace {
    grid-template-columns: 1fr;
  }

  .panel {
    min-height: auto;
  }

  #markdownInput {
    min-height: 360px;
  }

  .preview-shell {
    min-height: 420px;
  }
}

@media (max-width: 780px) {
  body {
    padding: 12px;
  }

  .hero {
    border-radius: 18px;
    padding: 16px;
  }

  .hero h1 {
    font-size: 1.55rem;
  }

  .hero-actions {
    gap: 8px;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .editor-meta {
    flex-direction: column;
  }

  .panel {
    border-radius: 16px;
    padding: 12px;
  }

  .md-render {
    padding: 14px;
    font-size: 15px;
  }
}