:root {
  color-scheme: light;
  --bg: #f4f7fb;
  --surface: #ffffff;
  --surface-container: #f7f9fc;
  --surface-container-high: #edf2f8;
  --surface-tonal: #eef6ff;
  --ink: #0c1222;
  --muted: #667085;
  --line: #dce4ee;
  --primary: #2563eb;
  --primary-dark: #1646c7;
  --primary-soft: #e9f1ff;
  --secondary: #16a3b8;
  --secondary-soft: #e8fbff;
  --tertiary: #f59e0b;
  --tertiary-soft: #fff7df;
  --success: #12a56f;
  --radius: 8px;
  --state-hover: rgba(37, 99, 235, 0.08);
  --state-press: rgba(37, 99, 235, 0.14);
  --shadow-1: 0 1px 2px rgba(16, 24, 40, 0.06), 0 1px 3px rgba(16, 24, 40, 0.05);
  --shadow-2: 0 12px 28px rgba(23, 37, 84, 0.1);
  --shadow-3: 0 20px 54px rgba(23, 37, 84, 0.13);
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

body {
  margin: 0;
  min-width: 960px;
  min-height: 100vh;
  background:
    radial-gradient(circle at 22% 0%, rgba(37, 99, 235, 0.1), transparent 32%),
    radial-gradient(circle at 100% 16%, rgba(18, 165, 111, 0.1), transparent 24%),
    linear-gradient(180deg, #fbfdff 0%, var(--bg) 100%);
  color: var(--ink);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0;
}

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

button {
  position: relative;
  border: 0;
  border-radius: var(--radius);
  background: var(--primary);
  color: white;
  cursor: pointer;
  font-weight: 800;
  overflow: visible;
  box-shadow: var(--shadow-1);
  transition:
    transform 150ms ease,
    background 150ms ease,
    box-shadow 150ms ease;
}

button::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: rgba(255, 255, 255, 0);
  transition: background 150ms ease;
  pointer-events: none;
}

button:hover {
  background: var(--primary-dark);
  box-shadow: var(--shadow-2);
  transform: translateY(-1px);
}

button:hover::after {
  background: rgba(255, 255, 255, 0.08);
}

button:active {
  transform: translateY(0);
  box-shadow: var(--shadow-1);
}

button:active::after {
  background: rgba(255, 255, 255, 0.16);
}

button:disabled,
button:disabled:hover {
  border-color: var(--line);
  background: var(--surface-container);
  color: var(--muted);
  cursor: not-allowed;
  box-shadow: none;
  transform: none;
}

button:disabled::after {
  background: transparent;
}

button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 3px solid rgba(22, 163, 184, 0.28);
  outline-offset: 2px;
}

#app {
  display: grid;
  grid-template-columns: 336px minmax(0, 1fr);
  height: 100vh;
}

#app.sidebar-minimized {
  grid-template-columns: 74px minmax(0, 1fr);
}

.sidebar {
  position: relative;
  border-right: 1px solid rgba(220, 228, 238, 0.92);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(247, 249, 252, 0.92)),
    var(--surface);
  padding: 20px 16px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 16px;
  box-shadow: 12px 0 34px rgba(23, 37, 84, 0.07);
}

.sidebar::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary), var(--success));
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.sidebar-toggle-main {
  margin-left: auto;
  flex: 0 0 auto;
}

#app.sidebar-minimized .brand {
  justify-content: center;
}

#app.sidebar-minimized .brand > div:not(.brand-mark),
#app.sidebar-minimized .search,
#app.sidebar-minimized .reference-import-section,
#app.sidebar-minimized .sidebar-section {
  display: none;
}

#app.sidebar-minimized .sidebar {
  padding-inline: 12px;
  align-items: center;
}

#app.sidebar-minimized .tool-nav {
  grid-template-columns: minmax(0, 1fr);
  width: 100%;
}

.brand-mark {
  width: 44px;
  height: 44px;
  border-radius: var(--radius);
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, #0c1222, var(--primary) 54%, var(--secondary));
  color: white;
  font-weight: 900;
  box-shadow: var(--shadow-2);
}

.brand h1,
.topbar h2 {
  margin: 0;
  color: var(--ink);
  font-size: 18px;
  line-height: 1.2;
  letter-spacing: 0;
}

.brand p,
.eyebrow,
.label {
  margin: 0;
  color: #697386;
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
}

.tool-nav {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

.nav-item {
  min-height: 38px;
  padding: 0 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  border: 1px solid rgba(220, 228, 238, 0.92);
  background: rgba(255, 255, 255, 0.82);
  color: var(--muted);
  box-shadow: none;
  font-size: 13px;
}

.nav-icon {
  width: 22px;
  height: 22px;
  display: inline-grid;
  place-items: center;
  border-radius: 6px;
  background: var(--surface-container);
  line-height: 1;
}

.nav-label {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.nav-item:hover,
.nav-item.active {
  border-color: rgba(37, 99, 235, 0.34);
  background: linear-gradient(180deg, #ffffff, var(--primary-soft));
  color: var(--primary-dark);
  box-shadow: 0 8px 22px rgba(37, 99, 235, 0.1);
}

.eyebrow {
  color: var(--primary);
}

.search {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

.search input,
.composer textarea {
  width: 100%;
  border: 1px solid transparent;
  border-bottom-color: #aeb8ca;
  border-radius: var(--radius) var(--radius) 4px 4px;
  background: var(--surface-container);
  color: var(--ink);
  transition:
    border 150ms ease,
    background 150ms ease,
    box-shadow 150ms ease;
}

.search input:hover,
.composer textarea:hover {
  border-color: #b8c3d5;
}

.search input:focus,
.composer textarea:focus {
  border-color: var(--primary);
  background: var(--surface);
  box-shadow: inset 0 -2px 0 var(--primary);
}

.search input {
  height: 42px;
  padding: 0 12px;
}

.rail-section {
  min-height: 0;
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: 10px;
}

.session-section {
  display: grid;
  gap: 10px;
  min-height: 132px;
  max-height: 192px;
}

.sidebar-section.collapsed {
  flex: 0 0 auto;
  min-height: auto;
  max-height: none;
  gap: 0;
}

.sidebar-section.collapsed .session-list,
.sidebar-section.collapsed .list {
  display: none;
}

.reference-import-section {
  display: grid;
  gap: 9px;
  border: 1px solid rgba(220, 228, 238, 0.95);
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, rgba(233, 241, 255, 0.8), rgba(255, 255, 255, 0.88)),
    var(--surface);
  padding: 12px;
  box-shadow: var(--shadow-1);
}

.reference-import-section .reference-actions {
  grid-template-columns: repeat(3, 1fr);
}

.flowmusic-extension-identity {
  display: grid;
  grid-template-columns: 8px auto minmax(0, 1fr);
  align-items: center;
  gap: 6px;
  min-width: 0;
  padding: 7px 8px;
  border: 1px solid color-mix(in srgb, var(--success) 28%, var(--line));
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--success) 7%, var(--surface));
  color: var(--muted);
  font-size: 10px;
  font-weight: 800;
}

.flowmusic-extension-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--success) 15%, transparent);
}

.flowmusic-extension-label {
  color: var(--success);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.flowmusic-extension-identity code {
  min-width: 0;
  overflow: hidden;
  color: var(--ink);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 10px;
  font-weight: 700;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.flowmusic-extension-identity[data-state="offline"] {
  border-color: var(--line);
  background: var(--surface-container);
}

.flowmusic-extension-identity[data-state="offline"] .flowmusic-extension-dot {
  background: var(--muted);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--muted) 12%, transparent);
}

.flowmusic-extension-identity[data-state="offline"] .flowmusic-extension-label {
  color: var(--muted);
}

.flowmusic-socket-actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 7px;
}

.reference-import-section .flowmusic-socket-action {
  min-width: 0;
  min-height: 30px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
  font-size: 10px;
}

.flowmusic-extension-list {
  display: grid;
  gap: 6px;
  max-height: 132px;
  overflow-y: auto;
}

.flowmusic-extension-search {
  display: grid;
  grid-template-columns: 18px minmax(0, 1fr);
  align-items: center;
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 0 7px;
  color: var(--muted);
}

.flowmusic-extension-search input {
  width: 100%;
  min-width: 0;
  min-height: 30px;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--ink);
  font-size: 10px;
}

.flowmusic-extension-pagination {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr) 30px;
  align-items: center;
  gap: 6px;
}

.reference-import-section .flowmusic-extension-pagination button {
  min-height: 26px;
  padding: 0;
  font-size: 15px;
}

.flowmusic-extension-pagination span {
  color: var(--muted);
  font-size: 9px;
  font-weight: 800;
  text-align: center;
}

.flowmusic-extension-row {
  display: grid;
  grid-template-columns: 7px minmax(0, 1fr) auto;
  align-items: center;
  gap: 6px;
  min-width: 0;
  padding: 7px 8px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--surface) 88%, var(--primary-soft));
}

.flowmusic-extension-row.is-empty {
  display: block;
  color: var(--muted);
  font-size: 10px;
  font-weight: 700;
  text-align: center;
}

.flowmusic-extension-row-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--success);
}

.flowmusic-extension-row.is-waiting .flowmusic-extension-row-dot {
  background: var(--tertiary);
}

.flowmusic-extension-row-details {
  display: grid;
  min-width: 0;
}

.flowmusic-extension-row-details code {
  overflow: hidden;
  color: var(--ink);
  font-size: 9px;
  font-weight: 800;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.flowmusic-extension-row-details small {
  overflow: hidden;
  color: var(--muted);
  font-size: 8px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.flowmusic-extension-row > strong {
  color: var(--success);
  font-size: 8px;
  text-transform: uppercase;
}

.flowmusic-socket-status {
  margin: -2px 0 0;
  color: var(--muted);
  font-size: 9px;
  font-weight: 700;
}

.flowmusic-socket-status[data-state="error"] {
  color: #b42318;
}

.flowmusic-socket-status[data-state="connected"] {
  color: var(--success);
}

.reference-import-section .ghost {
  width: 100%;
  min-height: 32px;
  padding: 0 8px;
  font-size: 12px;
  font-weight: 900;
}

.reference-import-section .reference-summary {
  max-height: 118px;
}

.youtube-import {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 38px;
  gap: 8px;
}

.youtube-import input {
  width: 100%;
  min-height: 34px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--ink);
  padding: 0 10px;
  font-size: 12px;
  font-weight: 800;
}

.youtube-import input:focus {
  border-color: var(--primary);
  outline: none;
  box-shadow: inset 0 -2px 0 var(--primary);
}

.mp3-upload-row {
  min-height: 36px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 8px;
  border: 1px dashed rgba(22, 163, 184, 0.44);
  border-radius: var(--radius);
  background: rgba(236, 253, 245, 0.58);
  color: var(--ink);
  padding: 0 10px;
  cursor: pointer;
}

.mp3-upload-row span {
  overflow: hidden;
  color: var(--muted);
  font-size: 12px;
  font-weight: 900;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.mp3-upload-row strong {
  color: var(--primary-dark);
  font-size: 12px;
  font-weight: 900;
}

.mp3-upload-row:hover {
  border-color: rgba(22, 163, 184, 0.72);
  background: rgba(236, 253, 245, 0.86);
}

.session-list {
  min-height: 0;
  overflow: auto;
  display: grid;
  gap: 8px;
  padding-right: 4px;
}

.mini-button {
  width: 26px;
  height: 26px;
  min-height: 26px;
  padding: 0;
  display: inline-grid;
  place-items: center;
  border: 1px solid rgba(37, 99, 235, 0.25);
  background: var(--primary-soft);
  color: var(--primary-dark);
  box-shadow: none;
  font-size: 15px;
}

.mini-button:hover {
  background: var(--primary);
  color: white;
}

.section-title-actions {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.section-toggle-button {
  width: 26px;
  height: 26px;
  min-height: 26px;
  padding: 0;
  display: inline-grid;
  place-items: center;
  border: 1px solid rgba(37, 99, 235, 0.2);
  background: var(--surface);
  color: var(--muted);
  box-shadow: none;
  font-size: 14px;
  font-weight: 900;
  line-height: 1;
}

.section-toggle-button:hover {
  border-color: rgba(37, 99, 235, 0.36);
  background: var(--primary-soft);
  color: var(--primary-dark);
  box-shadow: none;
  transform: none;
}

.section-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 900;
  text-transform: uppercase;
}

.section-title strong {
  min-width: 26px;
  min-height: 22px;
  display: inline-grid;
  place-items: center;
  border-radius: 999px;
  background: var(--secondary-soft);
  color: #8a5200;
  font-size: 11px;
}

.list {
  min-height: 0;
  overflow: auto;
  display: grid;
  gap: 9px;
  padding-right: 4px;
}