:root {
  --bg: #f7f8f5;
  --surface: #ffffff;
  --surface-muted: #f0f3ef;
  --ink: #1f2a24;
  --muted: #66736b;
  --line: #d9dfd7;
  --green: #2f6f5e;
  --red: #9a3b35;
  --shadow: 0 16px 40px rgba(31, 42, 36, 0.08);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background: var(--bg);
}

button,
input,
textarea {
  font: inherit;
}

button,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px 12px;
  color: var(--ink);
  background: var(--surface);
  text-decoration: none;
  cursor: pointer;
}

button.primary,
.button.primary {
  border-color: var(--green);
  color: #ffffff;
  background: var(--green);
}

button.danger {
  border-color: rgba(154, 59, 53, 0.35);
  color: var(--red);
  background: #fff8f7;
}

.app-shell {
  display: grid;
  grid-template-columns: 232px minmax(0, 1fr);
  min-height: 100vh;
}

.sidebar {
  padding: 24px 18px;
  border-right: 1px solid var(--line);
  background: #ffffff;
}

.brand {
  display: grid;
  gap: 4px;
  margin-bottom: 28px;
}

.brand strong {
  font-size: 19px;
  line-height: 1.25;
}

.brand span {
  color: var(--muted);
  font-size: 13px;
}

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

.nav a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 38px;
  padding: 0 10px;
  border-radius: 8px;
  color: var(--ink);
  text-decoration: none;
}

.nav a.active {
  color: #ffffff;
  background: var(--green);
}

.session-card {
  display: grid;
  gap: 6px;
  margin-top: 22px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfa;
}

.session-card span {
  color: var(--muted);
  font-size: 12px;
}

.session-card strong {
  overflow-wrap: anywhere;
  font-size: 14px;
}

.text-button {
  min-height: auto;
  justify-content: flex-start;
  padding: 0;
  border: 0;
  color: var(--green);
  background: transparent;
  font-size: 13px;
}

.mobile-role-view {
  background: #e8ece8;
}

.mobile-role-view .app-shell {
  display: block;
  min-height: 100vh;
}

.mobile-role-view .sidebar {
  display: none;
}

.mobile-role-view .main {
  position: relative;
  max-width: 480px;
  min-height: 100vh;
  margin: 0 auto;
  padding: 0;
  background: #fbfcfa;
}

.mobile-screen {
  min-height: 100vh;
  padding: 0 16px 104px;
}

.mobile-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  gap: 14px;
  align-items: center;
  margin: 0 -16px 12px;
  padding: 14px 16px 12px;
  border-bottom: 1px solid rgba(217, 223, 215, 0.86);
  background: rgba(251, 252, 250, 0.92);
  backdrop-filter: blur(18px);
}

.mobile-header h1 {
  margin: 2px 0 0;
  font-size: 26px;
  line-height: 1.12;
}

.mobile-brand {
  display: block;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.mobile-actions {
  display: flex;
  gap: 8px;
}

.icon-button {
  display: inline-grid;
  place-items: center;
  width: 40px;
  min-width: 40px;
  height: 40px;
  min-height: 40px;
  border-radius: 999px;
  padding: 0;
  color: var(--ink);
  background: #ffffff;
  box-shadow: 0 8px 24px rgba(31, 42, 36, 0.08);
  font-size: 20px;
  line-height: 1;
}

.mobile-summary {
  margin-bottom: 12px;
  color: var(--muted);
  font-size: 13px;
}

.mobile-lyric-list {
  display: grid;
  gap: 8px;
}

.mobile-row-block {
  display: grid;
  border: 1px solid rgba(217, 223, 215, 0.9);
  border-radius: 14px;
  background: #ffffff;
  overflow: hidden;
  box-shadow: 0 10px 26px rgba(31, 42, 36, 0.06);
}

.mobile-lyric-row {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) auto auto;
  gap: 10px;
  align-items: center;
  width: 100%;
  min-height: 58px;
  padding: 11px 12px;
  border: 1px solid rgba(217, 223, 215, 0.9);
  border-radius: 14px;
  color: var(--ink);
  background: #ffffff;
  text-align: left;
  box-shadow: 0 10px 26px rgba(31, 42, 36, 0.06);
}

.mobile-row-block .mobile-lyric-row {
  border: 0;
  border-radius: 0;
  box-shadow: none;
}

.mobile-row-block.expanded {
  border-color: rgba(47, 111, 94, 0.32);
}

.mobile-index {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 999px;
  color: #ffffff;
  background: var(--green);
  font-size: 12px;
  font-weight: 700;
}

.mobile-lyric-text {
  min-width: 0;
  line-height: 1.42;
  overflow-wrap: anywhere;
}

.mobile-count {
  display: grid;
  place-items: center;
  min-width: 30px;
  height: 30px;
  padding: 0 8px;
  border-radius: 999px;
  color: var(--green);
  background: #eef6f2;
  font-weight: 800;
  font-size: 14px;
}

.mobile-count.zero {
  color: var(--red);
  background: #fbefee;
}

.my-marker {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 0 8px;
  border-radius: 999px;
  color: #244f44;
  background: #dfeee7;
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
}

.inline-video-list {
  display: grid;
  gap: 10px;
  padding: 0 12px 12px 56px;
}

.inline-video-card {
  display: grid;
  gap: 8px;
  padding: 10px;
  border-radius: 12px;
  background: #f5f7f4;
}

.inline-video-card video {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  border-radius: 10px;
  background: #223029;
}

.inline-video-card strong {
  display: block;
  font-size: 13px;
  overflow-wrap: anywhere;
}

.inline-video-card span,
.inline-empty {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.45;
}

.mobile-fab {
  position: fixed;
  right: max(18px, calc((100vw - 480px) / 2 + 18px));
  bottom: 22px;
  z-index: 20;
  width: 58px;
  height: 58px;
  min-height: 58px;
  border: 0;
  border-radius: 999px;
  color: #ffffff;
  background: var(--green);
  box-shadow: 0 18px 36px rgba(47, 111, 94, 0.32);
  font-size: 34px;
  line-height: 1;
}

.mobile-login-card {
  margin-top: 22px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #ffffff;
  box-shadow: 0 12px 32px rgba(31, 42, 36, 0.08);
}

.mobile-login-card .login-form,
.sheet-form {
  display: grid;
  gap: 10px;
}

.mobile-login-card label,
.sheet-form label {
  color: var(--muted);
  font-size: 12px;
}

.mobile-login-card input,
.sheet-form input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px;
  color: var(--ink);
  background: #ffffff;
}

.sheet-backdrop {
  position: fixed;
  inset: 0;
  z-index: 40;
  display: grid;
  align-items: end;
  justify-items: center;
  padding: 16px;
  background: rgba(31, 42, 36, 0.32);
}

.sheet-backdrop[hidden] {
  display: none;
}

.bottom-sheet {
  width: min(100%, 480px);
  max-height: min(78vh, 720px);
  overflow: auto;
  border-radius: 20px 20px 16px 16px;
  background: #ffffff;
  box-shadow: 0 24px 60px rgba(31, 42, 36, 0.2);
}

.sheet-header {
  position: sticky;
  top: 0;
  z-index: 1;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  background: #ffffff;
}

.sheet-header h2 {
  margin: 0;
  font-size: 18px;
}

.sheet-form {
  padding: 16px;
}

.main {
  padding: 24px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: flex-start;
  margin-bottom: 22px;
}

h1 {
  margin: 0 0 8px;
  font-size: clamp(26px, 3.2vw, 40px);
  line-height: 1.08;
}

.lede {
  max-width: 720px;
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.toolbar {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(120px, 1fr));
  gap: 12px;
  margin-bottom: 18px;
}

.stat {
  padding: 15px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.stat span {
  display: block;
  color: var(--muted);
  font-size: 12px;
}

.stat strong {
  display: block;
  margin-top: 6px;
  font-size: 26px;
}

.workbench {
  display: grid;
  grid-template-columns: minmax(260px, 0.95fr) minmax(360px, 1.35fr) minmax(260px, 0.85fr);
  gap: 14px;
  align-items: start;
}

.public-workbench,
.admin-workbench {
  grid-template-columns: minmax(280px, 0.8fr) minmax(420px, 1.4fr);
}

.uploader-grid {
  display: grid;
  grid-template-columns: minmax(300px, 0.85fr) minmax(360px, 1.15fr);
  gap: 14px;
  align-items: start;
}

.panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  background: var(--surface-muted);
}

.panel-header h2 {
  margin: 0;
  font-size: 16px;
}

.panel-header span {
  color: var(--muted);
  font-size: 12px;
}

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

.lyric-row {
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr);
  gap: 10px;
  width: 100%;
  padding: 13px 14px;
  border: 0;
  border-bottom: 1px solid var(--line);
  border-radius: 0;
  text-align: left;
  background: #ffffff;
}

.lyric-row.active {
  background: #eef6f2;
  box-shadow: inset 4px 0 0 var(--green);
}

.lyric-index {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 999px;
  color: #ffffff;
  background: var(--green);
  font-size: 12px;
  font-weight: 700;
}

.lyric-main {
  min-width: 0;
}

.lyric-text {
  line-height: 1.45;
  overflow-wrap: anywhere;
}

.meta-line {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 8px;
  color: var(--muted);
  font-size: 12px;
}

.badge {
  display: inline-flex;
  align-items: center;
  min-height: 22px;
  padding: 0 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  background: #ffffff;
  font-size: 12px;
}

.badge.good {
  border-color: rgba(47, 111, 94, 0.28);
  color: var(--green);
  background: #eef6f2;
}

.badge.warn {
  border-color: rgba(154, 59, 53, 0.28);
  color: var(--red);
  background: #fbefee;
}

.badge.danger {
  border-color: rgba(95, 83, 72, 0.24);
  color: #5f5348;
  background: #f6f1ed;
}

.detail {
  padding: 16px;
}

.detail-title {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: start;
  margin-bottom: 14px;
}

.detail-title h2 {
  margin: 0;
  font-size: 22px;
  line-height: 1.28;
}

.edit-box {
  display: grid;
  gap: 10px;
  margin: 14px 0;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfa;
}

.edit-box textarea,
.edit-box input,
.field input,
.field textarea,
.structure-body textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px;
  color: var(--ink);
  background: #ffffff;
}

.edit-box textarea {
  min-height: 74px;
  resize: vertical;
}

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

.video-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background: #ffffff;
}

.video-card video {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  background: #223029;
}

.video-body {
  display: grid;
  gap: 6px;
  padding: 10px;
}

.video-body strong {
  font-size: 14px;
  overflow-wrap: anywhere;
}

.video-body span {
  color: var(--muted);
  font-size: 12px;
}

.side-stack {
  display: grid;
  gap: 14px;
}

.form {
  display: grid;
  gap: 10px;
  padding: 14px;
}

.field {
  display: grid;
  gap: 6px;
}

.field label {
  color: var(--muted);
  font-size: 12px;
}

.choice-list {
  display: grid;
  gap: 8px;
  max-height: 210px;
  overflow: auto;
  padding-right: 2px;
}

.choice {
  display: grid;
  grid-template-columns: 18px minmax(0, 1fr);
  gap: 8px;
  align-items: start;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  font-size: 13px;
  line-height: 1.35;
}

.dropzone {
  display: grid;
  gap: 5px;
  padding: 18px;
  border: 1px dashed var(--green);
  border-radius: 8px;
  color: var(--muted);
  background: #eef6f2;
  text-align: center;
  font-size: 13px;
}

.queue {
  display: grid;
  gap: 10px;
  padding: 14px;
}

.queue-item {
  display: grid;
  gap: 7px;
  padding: 11px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
}

.queue-item strong {
  font-size: 14px;
  overflow-wrap: anywhere;
}

.queue-item p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.45;
}

.queue-title {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  align-items: start;
}

.queue-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.mini-list {
  display: grid;
  gap: 6px;
}

.mini-line {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.45;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 14px;
}

.structure-panel {
  margin-top: 14px;
}

.structure-body {
  display: grid;
  gap: 10px;
  padding: 14px;
}

.structure-body textarea {
  min-height: 220px;
  resize: vertical;
}

.hint,
.status-text {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.status-text {
  min-height: 20px;
  color: var(--green);
}

@media (max-width: 1180px) {
  .workbench,
  .uploader-grid {
    grid-template-columns: 1fr;
  }

  .lyric-list {
    max-height: 430px;
  }
}

@media (max-width: 820px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

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

  .topbar,
  .detail-title {
    flex-direction: column;
  }

  .stats,
  .footer-grid,
  .video-grid {
    grid-template-columns: 1fr;
  }

  .main {
    padding: 16px;
  }
}