* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg: #1a1a2e;
  --bg-light: #16213e;
  --bg-card: #0f3460;
  --accent: #e94560;
  --accent-green: #4ecca3;
  --accent-orange: #f5a623;
  --login-btn: #3b6fd9;
  --text: #eee;
  --text-dim: #999;
  --border: #2a2a4a;
  --sidebar-w: 260px;
}

html, body {
  height: 100%;
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
}

#app {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

/* ---- Sidebar ---- */

#sidebar {
  width: var(--sidebar-w);
  min-width: var(--sidebar-w);
  background: var(--bg-light);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

#sidebar h2 {
  padding: 16px;
  font-size: 16px;
  border-bottom: 1px solid var(--border);
}

#sidebar-header {
  padding: 12px 12px 8px;
  border-bottom: 1px solid var(--border);
}

#csv-select {
  width: 100%;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 10px;
  font-size: 13px;
}

#nodule-count {
  padding: 4px 16px 8px;
  font-size: 12px;
  color: var(--text-dim);
}

#nodule-list {
  list-style: none;
  overflow-y: auto;
  flex: 1;
  padding: 0 8px 8px;
}

#nodule-list li {
  padding: 8px 10px;
  margin-bottom: 2px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: background 0.15s;
}

#nodule-list li:hover {
  background: rgba(255,255,255,0.06);
}

#nodule-list li.active {
  background: var(--bg-card);
  font-weight: 600;
}

.status-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.status-dot.annotated { background: var(--accent-green); }
.status-dot.pending { background: var(--accent); }

/* ---- Main ---- */

#main {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  padding: 16px 24px;
  gap: 12px;
  min-height: 0;
}

/* ---- Top bar ---- */

#topbar {
  display: flex;
  gap: 32px;
  align-items: center;
  flex-wrap: nowrap;
  width: 100%;
}

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

.topbar-section label {
  font-size: 13px;
  color: var(--text-dim);
  white-space: nowrap;
}

#annotator-select {
  background: var(--bg-light);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 10px;
  font-size: 14px;
  min-width: 160px;
}

#fps-slider {
  width: 140px;
  accent-color: var(--accent);
  cursor: pointer;
}

#fps-value {
  font-size: 14px;
  font-weight: 600;
  min-width: 28px;
  text-align: center;
}

#fps-value::after {
  content: " fps";
  font-weight: 400;
  color: var(--text-dim);
  font-size: 12px;
}

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

.btn-group-crop {
  display: flex;
  gap: 2px;
}

.crop-btn {
  padding: 5px 12px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text-dim);
  font-size: 12px;
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}

.crop-btn:first-child { border-radius: 6px 0 0 6px; }
.crop-btn:last-child { border-radius: 0 6px 6px 0; }

.crop-btn:hover { background: var(--bg-card); }

.crop-btn.selected {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 600;
}

.toggle-btn {
  padding: 5px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  color: var(--text-dim);
  font-size: 12px;
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}

.toggle-btn:hover { background: var(--bg-card); }

.toggle-btn.selected {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 600;
}

.topbar-shortcuts {
  font-size: 12px;
  color: var(--text-dim);
  margin-left: auto;
  white-space: nowrap;
}

.topbar-shortcuts kbd {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 1px 5px;
  font-size: 11px;
  font-family: inherit;
  color: var(--text);
}

/* ---- Video viewer ---- */

#viewer-container {
  background: #000;
  border-radius: 8px;
  position: relative;
  display: flex;
  flex-direction: column;
  flex: 1 1 auto;
  min-height: 500px;
  overflow: visible;
}

#nodule-title {
  padding: 8px 12px;
  font-size: 13px;
  color: var(--text-dim);
  align-self: flex-start;
  z-index: 2;
}

#volume-video {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #000;
}

/* Plyr overrides */
.plyr {
  display: none;
  width: 100%;
  flex: 1 1 auto;
  min-height: 0;
  --plyr-color-main: var(--accent);
  border-radius: 0 0 8px 8px;
  overflow: hidden;
}

.plyr__video-wrapper {
  width: 100%;
  height: 100%;
}

.plyr__controls {
  z-index: 10;
}

.plyr video {
  object-fit: contain;
  width: 100%;
  height: 100%;
  image-rendering: smooth;
}

#video-placeholder {
  padding: 80px 20px;
  font-size: 18px;
  color: var(--text-dim);
  text-align: center;
}

/* ---- Annotation panel ---- */

#annotation-panel {
  display: flex;
  flex-direction: column;
  gap: 12px;
  background: var(--bg-light);
  border-radius: 8px;
  padding: 16px;
}

.panel-label {
  font-size: 13px;
  color: var(--text-dim);
  min-width: 100px;
  flex-shrink: 0;
}

#classification-row, #confidence-row, #review-row, #save-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.btn-group {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

/* Confidence buttons */
.conf-btn {
  padding: 10px 18px;
  border: 2px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  cursor: pointer;
  min-width: 64px;
  text-align: center;
  transition: all 0.15s;
}

.conf-btn:hover { border-color: #555; }

.conf-btn.selected {
  background: var(--accent-orange);
  border-color: var(--accent-orange);
  color: #000;
  font-weight: 600;
}

/* Flag buttons row */
#flags-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.flag-btn-danger {
  border-color: var(--accent) !important;
  color: var(--accent) !important;
  margin-left: auto;
}

.flag-btn-danger:hover {
  background: rgba(233, 69, 96, 0.15) !important;
}

.flag-btn-danger.active {
  background: var(--accent) !important;
  color: #fff !important;
}

.flag-btn {
  padding: 10px 20px;
  border: 2px solid var(--accent-orange);
  border-radius: 6px;
  background: transparent;
  color: var(--accent-orange);
  font-size: 14px;
  cursor: pointer;
  transition: all 0.15s;
}

.flag-btn:hover { background: rgba(245, 166, 35, 0.1); }

.flag-btn.active {
  background: var(--accent-orange);
  color: #000;
  font-weight: 600;
}

/* ---- Navigation ---- */

#nav-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.nav-btn {
  padding: 14px 36px;
  border: 2px solid var(--border);
  border-radius: 8px;
  background: var(--bg-light);
  color: var(--text);
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s;
}

.nav-btn:hover { background: var(--bg-card); }

.nav-btn-highlight {
  border-color: var(--accent-green);
  color: var(--accent-green);
}

.nav-btn-highlight:hover {
  background: var(--accent-green);
  color: #000;
}

#nav-position {
  font-size: 13px;
  color: var(--text-dim);
}

/* ---- Scrollbar ---- */

::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #444; }

/* ---- Toast notification ---- */

.toast {
  position: fixed;
  top: 24px;
  right: 24px;
  padding: 12px 20px;
  border-radius: 8px;
  font-size: 14px;
  color: #fff;
  z-index: 1000;
  animation: toast-in 0.3s ease;
}

.toast.success { background: var(--accent-green); color: #000; }
.toast.error { background: var(--accent); }

@keyframes toast-in {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---- Login ---- */

.login-page {
  min-height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: var(--bg);
}

.login-card {
  width: 100%;
  max-width: 380px;
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 36px 32px 32px;
}

.login-brand {
  text-align: center;
  margin-bottom: 28px;
}

.login-logo {
  position: relative;
  display: inline-block;
  font-size: 28px;
  letter-spacing: -0.02em;
  color: var(--text);
  line-height: 1.1;
}

.login-logo-radio { font-weight: 400; }
.login-logo-logics { font-weight: 700; }

.login-waves {
  position: absolute;
  top: -2px;
  right: 18px;
  color: var(--text);
}

.login-subtitle {
  margin-top: 10px;
  font-size: 14px;
  color: var(--text-dim);
}

.login-label {
  display: block;
  font-size: 13px;
  margin-bottom: 6px;
  color: var(--text);
}

.login-input {
  width: 100%;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 14px;
  margin-bottom: 16px;
  outline: none;
}

.login-input:focus {
  border-color: var(--login-btn);
}

.login-error {
  color: var(--accent);
  font-size: 13px;
  margin: -4px 0 12px;
}

.login-submit {
  width: 100%;
  margin-top: 8px;
  padding: 12px 16px;
  border: none;
  border-radius: 999px;
  background: var(--login-btn);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: filter 0.15s;
}

.login-submit:hover { filter: brightness(1.08); }

.user-chip {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--text);
}

.user-chip strong { font-weight: 600; }

.btn-logout {
  padding: 5px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  color: var(--text-dim);
  font-size: 12px;
  cursor: pointer;
}

.btn-logout:hover {
  background: var(--bg-card);
  color: var(--text);
}

.btn-admin-link {
  padding: 5px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg-card);
  color: var(--text);
  font-size: 12px;
  text-decoration: none;
  cursor: pointer;
}

.btn-admin-link:hover {
  border-color: var(--login-btn);
  color: #fff;
}

/* ---- Admin ---- */

.admin-page {
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
}

.admin-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 24px;
  background: var(--bg-light);
  border-bottom: 1px solid var(--border);
}

.admin-header-left {
  display: flex;
  align-items: baseline;
  gap: 16px;
}

.admin-header-left h1 {
  font-size: 20px;
  font-weight: 600;
}

.admin-back {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 13px;
}

.admin-back:hover { color: var(--text); }

.admin-header-right {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
}

.admin-main {
  max-width: 960px;
  margin: 0 auto;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.admin-card {
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
}

.admin-card h2 {
  font-size: 16px;
  margin-bottom: 14px;
}

.admin-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.admin-card-head h2 { margin-bottom: 0; }

.admin-form {
  display: grid;
  grid-template-columns: 1fr 1fr auto auto;
  gap: 12px;
  align-items: end;
}

.admin-form label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 12px;
  color: var(--text-dim);
}

.admin-form input[type="text"],
.admin-form input[type="password"] {
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 9px 10px;
  font-size: 14px;
}

.admin-check {
  flex-direction: row !important;
  align-items: center;
  gap: 8px !important;
  padding-bottom: 10px;
  color: var(--text) !important;
  font-size: 13px !important;
}

.admin-btn {
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text-dim);
  font-size: 12px;
  cursor: pointer;
  white-space: nowrap;
}

.admin-btn:hover {
  background: var(--bg-card);
  color: var(--text);
}

.admin-btn.primary {
  background: var(--login-btn);
  border-color: var(--login-btn);
  color: #fff;
  font-weight: 600;
}

.admin-btn.on {
  background: var(--accent-green);
  border-color: var(--accent-green);
  color: #000;
  font-weight: 600;
}

.admin-msg {
  margin-top: 12px;
  font-size: 13px;
}

.admin-msg.ok { color: var(--accent-green); }
.admin-msg.err { color: var(--accent); }

.admin-table-wrap { overflow-x: auto; }

.admin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.admin-table th,
.admin-table td {
  text-align: left;
  padding: 10px 8px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}

.admin-table th {
  color: var(--text-dim);
  font-weight: 500;
}

@media (max-width: 800px) {
  .admin-form {
    grid-template-columns: 1fr;
  }
}