:root {
  color-scheme: light;
  --bg: #f6f7f9;
  --panel: #ffffff;
  --line: #d9dee7;
  --text: #17202f;
  --muted: #637083;
  --accent: #176b5b;
  --accent-dark: #105145;
  --danger: #a83232;
  --shadow: 0 10px 24px rgba(20, 31, 46, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button,
input,
textarea {
  font: inherit;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 20px 28px;
  border-bottom: 1px solid var(--line);
  background: #ffffff;
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  font-size: 24px;
  line-height: 1.2;
}

h2 {
  font-size: 17px;
}

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

.auth {
  display: grid;
  grid-template-columns: auto minmax(180px, 260px) auto;
  align-items: end;
  gap: 8px;
}

.auth label {
  color: var(--muted);
  font-size: 13px;
}

.layout {
  display: grid;
  grid-template-columns: minmax(340px, 0.85fr) minmax(420px, 1.15fr);
  gap: 16px;
  max-width: 1440px;
  margin: 0 auto;
  padding: 16px;
}

.panel {
  min-width: 0;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

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

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 54px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
}

.form,
.upload {
  display: grid;
  gap: 12px;
  padding: 16px;
}

.grid {
  display: grid;
  gap: 12px;
}

.two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 13px;
}

input,
textarea {
  width: 100%;
  min-width: 0;
  border: 1px solid #c9d0dc;
  border-radius: 6px;
  padding: 10px 11px;
  color: var(--text);
  background: #ffffff;
}

textarea {
  resize: vertical;
}

input:focus,
textarea:focus {
  outline: 2px solid rgba(23, 107, 91, 0.2);
  border-color: var(--accent);
}

.check {
  display: flex;
  align-items: center;
  gap: 8px;
}

.check input {
  width: 18px;
  height: 18px;
}

button {
  border: 1px solid #b8c1ce;
  border-radius: 6px;
  padding: 9px 12px;
  background: #ffffff;
  color: var(--text);
  cursor: pointer;
}

button:hover {
  border-color: #8c98a8;
}

.primary {
  border-color: var(--accent);
  background: var(--accent);
  color: #ffffff;
}

.primary:hover {
  border-color: var(--accent-dark);
  background: var(--accent-dark);
}

.searchbar {
  display: grid;
  grid-template-columns: 1fr minmax(150px, 220px) auto;
  gap: 8px;
  padding: 16px;
  border-bottom: 1px solid var(--line);
}

.list {
  max-height: 680px;
  overflow: auto;
}

.lesson {
  display: grid;
  gap: 8px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
}

.lesson:last-child {
  border-bottom: 0;
}

.lesson-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.lesson-title {
  display: grid;
  gap: 2px;
}

.lesson-title strong {
  font-size: 15px;
}

.lesson-actions {
  display: flex;
  gap: 6px;
  flex-shrink: 0;
}

.danger {
  color: var(--danger);
}

.analysis {
  display: grid;
  gap: 12px;
  padding: 0 16px 16px;
}

.import-result {
  display: grid;
  gap: 12px;
  padding: 0 16px 16px;
}

.template {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 0 16px 16px;
}

.template strong,
.template span {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 5px 8px;
  background: #fbfcfd;
  font-size: 13px;
}

.template strong {
  color: var(--muted);
}

.summary,
.flag {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  background: #fbfcfd;
}

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

.toast {
  position: fixed;
  right: 16px;
  bottom: 16px;
  max-width: min(420px, calc(100vw - 32px));
  padding: 12px 14px;
  border-radius: 8px;
  background: #17202f;
  color: #ffffff;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 150ms ease, transform 150ms ease;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 980px) {
  .topbar,
  .layout,
  .searchbar,
  .two,
  .auth {
    grid-template-columns: 1fr;
  }

  .topbar {
    display: grid;
  }
}