:root {
  --bg: #f2f5f9;
  --card: #ffffff;
  --primary: #0f766e;
  --primary-dark: #115e59;
  --text: #0f172a;
  --muted: #64748b;
  --border: #dbe5ef;
  --success: #15803d;
  --danger: #b91c1c;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", "PingFang SC", "Noto Sans SC", sans-serif;
  background:
    radial-gradient(circle at 10% 10%, #dff7f2 0%, transparent 35%),
    radial-gradient(circle at 85% 0%, #dbeafe 0%, transparent 35%),
    var(--bg);
  color: var(--text);
  display: grid;
  place-items: center;
  padding: 24px;
}

.container {
  width: min(920px, 100%);
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: 0 16px 42px rgba(2, 6, 23, 0.08);
  padding: 28px;
}

h1 {
  margin: 0;
  font-size: 28px;
}

.sub {
  margin: 8px 0 20px;
  color: var(--muted);
}

.input-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
}

input {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px;
  font-size: 15px;
}

button {
  border: none;
  border-radius: 10px;
  padding: 0 18px;
  background: var(--primary);
  color: #fff;
  font-size: 15px;
  cursor: pointer;
  transition: background 0.2s;
}

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

.message {
  min-height: 24px;
  margin: 12px 0;
  color: var(--muted);
}

.video-info {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 14px;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #f8fafc;
}

.video-info img {
  width: 100%;
  border-radius: 8px;
  object-fit: cover;
}

h2 {
  margin: 0 0 8px;
  font-size: 18px;
}

h3 {
  margin: 18px 0 10px;
}

.table-wrap {
  overflow: auto;
  border: 1px solid var(--border);
  border-radius: 10px;
}

table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
}

th,
td {
  border-bottom: 1px solid var(--border);
  padding: 10px;
  text-align: left;
  font-size: 14px;
}

th {
  background: #f8fafc;
}

.download-btn {
  margin-top: 12px;
}

.task {
  margin-top: 18px;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #f8fafc;
}

.task-head {
  display: flex;
  justify-content: space-between;
  margin-bottom: 8px;
  font-size: 14px;
}

.bar {
  width: 100%;
  height: 12px;
  border-radius: 999px;
  background: #e2e8f0;
  overflow: hidden;
}

#barInner {
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, #14b8a6, #0f766e);
  transition: width 0.2s ease;
}

.task-detail {
  color: var(--muted);
  font-size: 14px;
  margin: 10px 0;
}

.download-link {
  display: inline-block;
  text-decoration: none;
  background: var(--success);
  color: #fff;
  padding: 8px 14px;
  border-radius: 8px;
}

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

.hidden {
  display: none;
}

@media (max-width: 700px) {
  .card {
    padding: 18px;
  }

  .video-info {
    grid-template-columns: 1fr;
  }

  .input-row {
    grid-template-columns: 1fr;
  }

  button {
    height: 44px;
  }
}