:root {
  color-scheme: light;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --page: #f5f7f8;
  --panel: #ffffff;
  --text: #182026;
  --muted: #5b6974;
  --border: #d7dee3;
  --border-strong: #b8c4cc;
  --border-soft: #e7ecef;
  --subtle: #f9fbfc;
  --title-bg: #eef3f5;
  --primary: #0f766e;
  --secondary: #2d3740;
  --button-text: #ffffff;
  background: var(--page);
  color: var(--text);
}

[data-theme="dark"] {
  color-scheme: dark;
  --page: #0d1117;
  --panel: #0d1117;
  --text: #c9d1d9;
  --muted: #8b949e;
  --border: #30363d;
  --border-strong: #484f58;
  --border-soft: #21262d;
  --subtle: #161b22;
  --title-bg: #161b22;
  --primary: #238636;
  --secondary: #21262d;
  --button-text: #ffffff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--page);
  color: var(--text);
}

.shell {
  display: grid;
  grid-template-columns: minmax(320px, 420px) minmax(0, 1fr);
  gap: 20px;
  min-height: 100vh;
  padding: 20px;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
}

.controls {
  align-self: start;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 8px;
  font-size: 28px;
}

h2 {
  margin-bottom: 8px;
  font-size: 18px;
}

p,
#meta,
#status {
  color: var(--muted);
}

.app-head {
  display: flex;
  justify-content: space-between;
  align-items: start;
  gap: 16px;
}

.theme-toggle {
  width: auto;
  min-width: 76px;
  height: 34px;
  border-color: var(--border);
  border-radius: 999px;
  background: var(--title-bg);
  color: var(--text);
  font-size: 13px;
  font-weight: 750;
}

form {
  display: grid;
  gap: 16px;
}

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

label {
  display: grid;
  gap: 6px;
  font-size: 13px;
  font-weight: 650;
}

input,
select,
textarea,
button,
.file-picker {
  width: 100%;
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  font: inherit;
}

input,
select {
  height: 40px;
  padding: 0 10px;
  background: var(--panel);
  color: var(--text);
}

.file-picker {
  min-height: 64px;
  align-items: center;
  justify-content: center;
  padding: 14px;
  border-style: dashed;
  background: var(--subtle);
  cursor: pointer;
}

.file-picker input {
  display: none;
}

.checkbox {
  display: flex;
  align-items: center;
  gap: 10px;
}

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

button {
  height: 42px;
  border-color: var(--primary);
  background: var(--primary);
  color: var(--button-text);
  font-weight: 750;
  cursor: pointer;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.result-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: start;
}

.actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.action-group {
  display: grid;
  gap: 6px;
  min-width: 132px;
}

.actions button {
  width: auto;
  min-width: 0;
  background: var(--secondary);
  border-color: var(--secondary);
}

.actions .preview-button {
  height: 34px;
  background: var(--title-bg);
  border-color: var(--border-strong);
  color: var(--text);
  font-size: 13px;
}

textarea {
  min-height: 220px;
  resize: vertical;
  padding: 12px;
  line-height: 1.5;
  background: var(--panel);
  color: var(--text);
}

.results {
  display: grid;
  gap: 16px;
  min-width: 0;
}

.srt-widget {
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.widget-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 12px;
  background: var(--title-bg);
  border-bottom: 1px solid var(--border);
}

.widget-head h2 {
  margin: 0;
}

.icon-button {
  width: auto;
  min-width: 72px;
  height: 34px;
  padding: 0 12px;
  background: var(--panel);
  border-color: var(--border-strong);
  color: var(--text);
}

#srt-preview {
  max-height: 280px;
  margin: 0;
  overflow: auto;
  padding: 12px;
  white-space: pre-wrap;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 13px;
  line-height: 1.45;
}

.table-wrap {
  overflow: auto;
  border: 1px solid var(--border);
  border-radius: 8px;
  max-height: 45vh;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

th,
td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border-soft);
  text-align: left;
}

th {
  position: sticky;
  top: 0;
  background: var(--title-bg);
}

@media (max-width: 860px) {
  .shell {
    grid-template-columns: 1fr;
    padding: 12px;
  }

  .grid {
    grid-template-columns: 1fr;
  }

  .app-head {
    display: grid;
  }

  .result-head {
    display: grid;
  }

  .actions,
  .action-group,
  .actions button {
    max-width: none;
    width: 100%;
  }
}