:root {
  color-scheme: dark;
  --background: #07110f;
  --surface: rgba(16, 34, 30, 0.82);
  --surface-strong: #10221e;
  --line: rgba(180, 225, 210, 0.16);
  --text: #eef8f4;
  --muted: #9ab3aa;
  --accent: #79e8bd;
  --accent-strong: #35c990;
  --warn: #ffca7a;
  --danger: #ff9b8d;
  --shadow: 0 30px 80px rgba(0, 0, 0, 0.28);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  background:
    radial-gradient(circle at 82% 10%, rgba(53, 201, 144, 0.15), transparent 32rem),
    radial-gradient(circle at 8% 72%, rgba(56, 132, 255, 0.09), transparent 30rem),
    var(--background);
  color: var(--text);
  font-family: Inter, "Segoe UI", "Microsoft YaHei", system-ui, sans-serif;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 48px 48px;
  content: "";
  mask-image: linear-gradient(to bottom, black, transparent 85%);
}

button,
a {
  font: inherit;
}

button {
  cursor: pointer;
}

.shell {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  min-height: 100vh;
}

.sidebar {
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 24px;
  border-right: 1px solid var(--line);
  background: rgba(7, 17, 15, 0.78);
  backdrop-filter: blur(18px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 6px;
}

.brand-mark {
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  border: 1px solid rgba(121, 232, 189, 0.38);
  border-radius: 13px;
  background: rgba(121, 232, 189, 0.1);
  color: var(--accent);
  font-weight: 800;
}

.brand h1,
.overview-band h2,
.section-title h3 {
  margin: 0;
  line-height: 1.15;
}

.brand h1 {
  font-size: 21px;
}

.brand p,
.summary,
.muted {
  color: var(--muted);
}

.brand p {
  margin: 4px 0 0;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.workspace {
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 28px;
}

.overview-band,
.panel,
.progress-section,
.code-section {
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.overview-band {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 24px;
  border-radius: 18px;
}

.eyebrow {
  margin: 0 0 9px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 750;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.overview-band h2 {
  font-size: 28px;
}

.summary {
  max-width: 760px;
  margin: 10px 0 0;
  line-height: 1.7;
}

.top-actions {
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.action-link,
.icon-button,
.module-button {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.035);
  color: var(--text);
  font-weight: 650;
  text-decoration: none;
}

.action-link {
  padding: 9px 12px;
  white-space: nowrap;
}

.icon-button {
  width: 34px;
  height: 34px;
  padding: 0;
}

.icon-button:disabled {
  cursor: wait;
  opacity: 0.55;
}

.panel,
.progress-section,
.code-section {
  border-radius: 14px;
}

.panel {
  padding: 16px;
}

.panel.compact {
  padding: 14px;
}

.panel-title,
.section-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 12px;
  font-weight: 750;
}

.section-title {
  margin: 0;
  padding: 18px;
  border-bottom: 1px solid var(--line);
}

.stats-list {
  display: grid;
  gap: 10px;
  margin: 0;
}

.stats-list div {
  display: flex;
  justify-content: space-between;
  gap: 12px;
}

.stats-list dt {
  color: var(--muted);
}

.stats-list dd {
  margin: 0;
  overflow-wrap: anywhere;
  text-align: right;
}

.collection-list,
.file-list {
  display: grid;
  gap: 8px;
}

.collection-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 0;
  border-top: 1px solid var(--line);
}

.collection-item:first-child {
  border-top: 0;
}

.collection-name {
  font-weight: 700;
}

.tag {
  padding: 4px 9px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.07);
  color: var(--muted);
  font-size: 11px;
}

.tag.done {
  background: rgba(121, 232, 189, 0.11);
  color: var(--accent);
}

.tag.planned {
  background: rgba(255, 202, 122, 0.1);
  color: var(--warn);
}

.module-button {
  width: 100%;
  padding: 11px;
  text-align: left;
}

.module-button.active {
  border-color: rgba(121, 232, 189, 0.42);
  background: rgba(121, 232, 189, 0.08);
}

.module-button strong,
.module-button span {
  display: block;
}

.module-button span {
  margin-top: 5px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.4;
}

.milestone-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  padding: 18px;
}

.milestone {
  min-height: 150px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.025);
}

.milestone-head {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 12px;
}

.milestone h4,
.milestone p {
  margin: 0;
}

.milestone p {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.65;
}

.path-pill {
  padding: 5px 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--muted);
  font-size: 12px;
}

pre {
  min-height: 320px;
  max-height: 52vh;
  margin: 0;
  overflow: auto;
  padding: 24px;
  background: #06100d;
  color: #d9f7ea;
  font-family: "Cascadia Code", Consolas, monospace;
  font-size: 14px;
  line-height: 1.8;
  white-space: pre-wrap;
}

@media (max-width: 1040px) {
  .milestone-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 860px) {
  .shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .overview-band,
  .top-actions {
    flex-direction: column;
  }
}

@media (max-width: 600px) {
  .workspace,
  .sidebar {
    padding: 16px;
  }

  .section-title {
    align-items: flex-start;
    flex-direction: column;
  }
}