:root {
  color-scheme: light;
  --bg: #f6f8fb;
  --panel: #ffffff;
  --ink: #152033;
  --muted: #617089;
  --line: #d9e0ea;
  --accent: #0b7a75;
  --accent-dark: #075d59;
  --danger: #b42318;
  --danger-bg: #fff0ed;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button,
input {
  font: inherit;
}

button {
  min-height: 42px;
  border: 0;
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  padding: 0 16px;
  cursor: pointer;
}

button:hover {
  background: var(--accent-dark);
}

button.secondary {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
}

button.secondary:hover {
  background: #eef3f7;
}

button.danger {
  background: var(--danger-bg);
  color: var(--danger);
}

button.danger:hover {
  background: #ffd8d1;
}

button:disabled {
  cursor: not-allowed;
  opacity: .55;
}

input[type="text"],
input[type="password"],
input[type="file"] {
  width: 100%;
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
  padding: 9px 11px;
}

label {
  display: block;
  margin: 12px 0 6px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 22px clamp(16px, 4vw, 42px);
  border-bottom: 1px solid var(--line);
  background: #fff;
}

.topbar h1,
.login-panel h1 {
  margin: 0;
  font-size: clamp(24px, 4vw, 34px);
  letter-spacing: 0;
}

.topbar p {
  margin: 4px 0 0;
  color: var(--muted);
}

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, .75fr);
  gap: 18px;
  width: min(1180px, calc(100% - 32px));
  margin: 22px auto 44px;
}

.panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  padding: 18px;
}

.panel.wide {
  grid-column: 1 / -1;
}

.panel h2 {
  margin: 0 0 12px;
  font-size: 20px;
}

.active-state {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  border-radius: 999px;
  background: #e8f6f3;
  color: #075d59;
  font-weight: 800;
  padding: 5px 12px;
}

.active-state.inactive {
  background: #eef1f5;
  color: var(--muted);
}

.upload-form {
  display: grid;
  gap: 12px;
}

.hint,
.message {
  color: var(--muted);
  font-size: 14px;
}

.message.error {
  color: var(--danger);
}

.section-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.video-list {
  display: grid;
  gap: 14px;
}

.video-card {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
}

.video-card video {
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: 6px;
  background: #111827;
}

.video-meta {
  min-width: 0;
}

.video-meta h3 {
  margin: 0 0 6px;
  overflow-wrap: anywhere;
  font-size: 16px;
}

.video-meta p {
  margin: 4px 0;
  color: var(--muted);
  font-size: 14px;
}

.video-url {
  width: 100%;
  margin-top: 8px;
}

.video-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 12px;
}

.empty {
  border: 1px dashed var(--line);
  border-radius: 8px;
  color: var(--muted);
  padding: 22px;
  text-align: center;
}

.login-page {
  display: grid;
  place-items: center;
  padding: 20px;
}

.login-panel {
  width: min(420px, 100%);
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  padding: 24px;
}

.login-form {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

@media (max-width: 780px) {
  .topbar,
  .section-heading {
    align-items: stretch;
    flex-direction: column;
  }

  .layout,
  .video-card {
    grid-template-columns: 1fr;
  }
}