:root {
  color-scheme: light;
  --bg: #f6f7f9;
  --surface: #ffffff;
  --surface-2: #eef2f5;
  --text: #1d252d;
  --muted: #66717d;
  --line: #d8dee5;
  --red: #c92828;
  --green: #157f54;
  --accent: #0f6b9e;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

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

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

button {
  border: 0;
  border-radius: 6px;
  background: var(--text);
  color: #fff;
  min-height: 40px;
  padding: 0 14px;
  cursor: pointer;
}

input,
textarea,
select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--text);
  min-height: 40px;
  padding: 9px 11px;
}

label {
  display: grid;
  gap: 6px;
  color: #34414d;
  font-weight: 650;
  font-size: 14px;
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  font-size: 42px;
  line-height: 1.05;
}

h2 {
  font-size: 22px;
}

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

.error {
  color: var(--red);
  min-height: 20px;
}

.login-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
  background:
    linear-gradient(rgba(20, 30, 35, 0.48), rgba(20, 30, 35, 0.48)),
    url("/assets/training-login-bg.png") center / cover;
}

.login-panel {
  width: min(460px, 100%);
  display: grid;
  gap: 24px;
  padding: 28px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 22px 80px rgba(0, 0, 0, 0.25);
}

.eyebrow {
  color: var(--green);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

.demo-note {
  color: var(--muted);
  font-size: 13px;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 2;
  display: grid;
  grid-template-columns: 210px minmax(220px, 1fr) auto;
  gap: 16px;
  align-items: center;
  padding: 14px 22px;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
}

.brand,
.user-chip {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 32px;
  border-radius: 6px;
  background: var(--red);
  color: #fff;
  font-size: 14px;
}

.search {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
}

.user-chip {
  justify-content: end;
  font-size: 14px;
}

.user-chip button,
.player-head button {
  background: var(--surface-2);
  color: var(--text);
}

.layout {
  display: grid;
  grid-template-columns: 230px 1fr;
  gap: 24px;
  padding: 22px;
}

.sidebar {
  display: grid;
  align-content: start;
  gap: 8px;
}

.category {
  width: 100%;
  background: transparent;
  color: var(--text);
  text-align: left;
}

.category.active {
  background: var(--surface-2);
  font-weight: 800;
}

.content {
  display: grid;
  gap: 22px;
}

.upload-panel {
  display: grid;
  gap: 16px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.admin-panel {
  display: grid;
  gap: 16px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.upload-grid,
.user-grid {
  display: grid;
  grid-template-columns: 1fr 220px;
  gap: 14px;
  align-items: end;
}

.user-grid {
  grid-template-columns: 1fr 1.2fr 160px 190px auto;
}

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

.check {
  display: flex;
  gap: 9px;
  align-items: center;
}

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

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

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

.library-actions button {
  min-width: 92px;
}

.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 18px;
}

.video-card {
  display: grid;
  gap: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  overflow: hidden;
  text-align: left;
  color: var(--text);
  padding: 0 0 14px;
}

.card-actions {
  display: flex;
  gap: 8px;
  padding: 0 14px;
}

.icon-button {
  display: inline-grid;
  place-items: center;
  width: 34px;
  height: 34px;
  min-height: 34px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface-2);
  color: var(--text);
  font-size: 18px;
  line-height: 1;
}

.icon-button:hover {
  border-color: #aab5c0;
  background: #e4e9ee;
}

.icon-button:disabled {
  cursor: wait;
  opacity: 0.7;
}

.danger {
  background: var(--red);
  border-color: var(--red);
  color: #fff;
}

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

.user-row {
  display: grid;
  grid-template-columns: minmax(180px, 1fr) 160px minmax(220px, 300px);
  gap: 12px;
  align-items: center;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfd;
}

.password-reset {
  display: grid;
  grid-template-columns: 1fr 34px;
  gap: 8px;
  align-items: center;
}

.thumb {
  display: grid;
  place-items: center;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, #1f2933, #467f72);
  color: #fff;
  font-weight: 900;
  object-fit: cover;
}

.video-card h3,
.video-card p {
  padding: 0 14px;
}

.video-card h3 {
  margin: 0;
  font-size: 17px;
}

.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  color: var(--muted);
  font-size: 13px;
}

.empty {
  padding: 40px;
  text-align: center;
  color: var(--muted);
  border: 1px dashed var(--line);
  border-radius: 8px;
}

.load-more {
  justify-self: center;
  min-width: 150px;
  background: var(--surface-2);
  color: var(--text);
}

dialog {
  width: min(980px, calc(100vw - 32px));
  border: 0;
  border-radius: 8px;
  padding: 18px;
  box-shadow: 0 22px 90px rgba(0, 0, 0, 0.35);
}

dialog::backdrop {
  background: rgba(10, 18, 25, 0.62);
}

.player-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
}

video {
  width: 100%;
  max-height: 70vh;
  background: #000;
  border-radius: 6px;
}

#playerDescription {
  margin-top: 14px;
  color: #34414d;
  line-height: 1.5;
}

.edit-form {
  display: grid;
  gap: 14px;
}

.dialog-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

@media (max-width: 760px) {
  .topbar,
  .layout,
  .upload-grid,
  .user-grid,
  .user-row {
    grid-template-columns: 1fr;
  }

  .topbar {
    position: static;
  }

  .sidebar {
    display: flex;
    gap: 8px;
    overflow-x: auto;
  }

  .category {
    white-space: nowrap;
  }

  .user-chip {
    justify-content: start;
  }
}