:root {
  color-scheme: light;
  --bg: #f5f2ed;
  --surface: #ffffff;
  --ink: #171a1f;
  --muted: #68717d;
  --line: #ded9d2;
  --accent: #ff6b45;
  --accent-dark: #ba3f24;
  --green: #24785b;
  --blue: #315f96;
  --shadow: 0 22px 60px rgba(24, 30, 38, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(120deg, rgba(255, 255, 255, 0.78), rgba(255, 255, 255, 0.2)),
    var(--bg);
  color: var(--ink);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Microsoft YaHei", sans-serif;
  letter-spacing: 0;
}

button,
input,
select,
textarea {
  font: inherit;
}

.app-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0 48px;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(280px, 0.85fr) minmax(420px, 1.15fr);
  min-height: 650px;
  overflow: hidden;
  border: 1px solid rgba(28, 31, 35, 0.08);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.visual-panel {
  position: relative;
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 18px;
  padding: 24px;
  background: #15181d;
  color: #fff;
}

.brand-row {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 30px;
  font-size: 15px;
  font-weight: 750;
}

.mark {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background:
    linear-gradient(135deg, transparent 38%, rgba(255, 255, 255, 0.72) 39% 51%, transparent 52%),
    var(--accent);
}

.body-map {
  align-self: center;
  width: min(100%, 420px);
  max-height: 480px;
  margin: 0 auto;
  border-radius: 8px;
  object-fit: contain;
}

.quick-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.quick-stats div {
  min-width: 0;
  padding: 14px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
}

.quick-stats span {
  display: block;
  color: rgba(255, 255, 255, 0.68);
  font-size: 12px;
}

.quick-stats strong {
  display: block;
  margin-top: 4px;
  overflow-wrap: anywhere;
  font-size: 19px;
  line-height: 1.2;
}

.control-panel {
  padding: 30px;
}

.page-header {
  margin-bottom: 22px;
}

.eyebrow {
  margin: 0 0 9px;
  color: var(--accent-dark);
  font-size: 13px;
  font-weight: 800;
}

h1 {
  max-width: 680px;
  margin: 0;
  font-size: clamp(30px, 5vw, 54px);
  line-height: 1.05;
  letter-spacing: 0;
}

.tabs {
  display: flex;
  gap: 8px;
  width: fit-content;
  margin-bottom: 20px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f7f5f2;
}

.tab {
  min-height: 38px;
  padding: 0 16px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}

.tab:disabled {
  cursor: not-allowed;
  opacity: 0.52;
}

.tab.is-active {
  background: var(--ink);
  color: #fff;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

label {
  display: grid;
  gap: 8px;
  min-width: 0;
  color: var(--muted);
  font-size: 13px;
  font-weight: 760;
}

label.full {
  grid-column: 1 / -1;
}

input,
select,
textarea {
  width: 100%;
  min-height: 46px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  outline: none;
}

input,
select {
  padding: 0 13px;
}

textarea {
  resize: vertical;
  padding: 12px 13px;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(255, 107, 69, 0.16);
}

.primary-action {
  grid-column: 1 / -1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  margin-top: 4px;
  border: 0;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font-weight: 850;
  cursor: pointer;
}

.primary-action:disabled {
  cursor: wait;
  opacity: 0.68;
}

.is-hidden {
  display: none;
}

.result-area {
  margin-top: 18px;
}

.status-line {
  min-height: 42px;
  padding: 12px 0;
  color: var(--muted);
  font-size: 14px;
}

.result-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 14px;
}

.result-card {
  grid-column: span 6;
  min-width: 0;
  padding: 18px;
  border: 1px solid rgba(28, 31, 35, 0.08);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 12px 36px rgba(24, 30, 38, 0.08);
}

.result-card.wide {
  grid-column: 1 / -1;
}

.result-card h2,
.result-card h3 {
  margin: 0 0 12px;
  font-size: 18px;
  line-height: 1.25;
}

.result-card p {
  margin: 0;
  color: #343b45;
  line-height: 1.75;
}

.spaced {
  margin-top: 12px;
}

.metric-row,
.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.pill {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0 10px;
  border-radius: 8px;
  background: #f2f0ec;
  color: #2d333b;
  font-size: 13px;
  font-weight: 750;
}

.pill.green {
  background: rgba(36, 120, 91, 0.12);
  color: var(--green);
}

.pill.blue {
  background: rgba(49, 95, 150, 0.12);
  color: var(--blue);
}

.list {
  display: grid;
  gap: 9px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.list li {
  position: relative;
  padding-left: 18px;
  color: #343b45;
  line-height: 1.62;
}

.list li::before {
  content: "";
  position: absolute;
  top: 0.74em;
  left: 0;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
}

.exercise-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.exercise {
  min-width: 0;
  padding: 15px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfaf8;
}

.exercise h3 {
  margin-bottom: 8px;
}

.exercise-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 12px;
}

.exercise-meta span {
  padding: 5px 8px;
  border-radius: 7px;
  background: #ece8e2;
  color: #454c55;
  font-size: 12px;
  font-weight: 760;
}

.exercise details {
  margin-top: 10px;
}

.exercise summary {
  cursor: pointer;
  color: var(--accent-dark);
  font-weight: 800;
}

.error {
  border-color: rgba(186, 63, 36, 0.24);
  background: rgba(255, 107, 69, 0.08);
}

@media (max-width: 860px) {
  .app-shell {
    width: min(100% - 20px, 680px);
    padding-top: 10px;
  }

  .workspace,
  .form-grid,
  .exercise-grid {
    grid-template-columns: 1fr;
  }

  .workspace {
    min-height: 0;
  }

  .visual-panel {
    min-height: 470px;
  }

  .control-panel {
    padding: 22px;
  }

  label.full,
  .primary-action {
    grid-column: auto;
  }

  .result-card {
    grid-column: 1 / -1;
  }

  h1 {
    font-size: 36px;
  }
}

@media (max-width: 520px) {
  .quick-stats {
    grid-template-columns: 1fr;
  }

  .tabs {
    width: 100%;
  }

  .tab {
    flex: 1;
    padding: 0 10px;
  }

  h1 {
    font-size: 31px;
  }
}