:root {
  --bg: #0b0d12;
  --bg-card: #151822;
  --bg-input: #0e1017;
  --border: #262b38;
  --border-hover: #3a4256;
  --text: #eceef2;
  --text-dim: #8b93a7;
  --accent: #5b7cff;
  --accent-2: #8f5bff;
  --accent-hover: #7291ff;
  --success: #3ecf8e;
  --error: #ff6b7d;
  --warning: #e8b339;
  --radius: 14px;
  --radius-sm: 9px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  line-height: 1.55;
  position: relative;
  min-height: 100vh;
}

.bg-glow {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(circle at 15% -10%, rgba(91, 124, 255, 0.16), transparent 45%),
    radial-gradient(circle at 90% 10%, rgba(143, 91, 255, 0.10), transparent 40%);
  pointer-events: none;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 28px;
  border-bottom: 1px solid var(--border);
  background: rgba(21, 24, 34, 0.6);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand {
  color: var(--text);
  font-weight: 700;
  text-decoration: none;
  font-size: 1.05rem;
  display: flex;
  align-items: center;
  gap: 8px;
  letter-spacing: -0.01em;
}

.brand-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  font-size: 0.9rem;
}

.topbar nav a {
  color: var(--text-dim);
  text-decoration: none;
  margin-left: 22px;
  font-size: 0.92rem;
  font-weight: 500;
  transition: color 0.15s;
}

.topbar nav a:hover { color: var(--text); }

.topbar nav a.admin-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  margin-left: 0;
}

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

.container {
  max-width: 880px;
  margin: 0 auto;
  padding: 40px 24px 80px;
}

.hero { margin-bottom: 28px; }

.hero-title-row {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 6px;
}

.hero-title-row h1 { margin: 0; }

.hero-title-row .back-link {
  position: fixed;
  top: 96px;
  /* Sit just outside the centered 880px .container's left edge (half its
     width is 440px) rather than pinned to the viewport edge, so it stays
     close to the content instead of drifting away on wide screens. */
  left: calc(50% - 500px);
  margin-bottom: 0;
  flex-shrink: 0;
  z-index: 5;
}

@media (max-width: 1000px) {
  /* Below this the .container no longer sits at its full 880px width, so
     the calc() above would push the button off-screen - fall back to
     inline next to the title instead. */
  .hero-title-row .back-link { position: static; }
}

h1 {
  font-size: 1.8rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 6px;
}

.hero-sub {
  color: var(--text-dim);
  margin: 0;
  font-size: 1rem;
}

h2 {
  font-size: 1.05rem;
  margin: 36px 0 12px;
  color: var(--text-dim);
  font-weight: 600;
  letter-spacing: -0.01em;
}

.card {
  background: linear-gradient(180deg, var(--bg-card), rgba(21, 24, 34, 0.85));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  box-shadow: 0 12px 30px -18px rgba(0, 0, 0, 0.6);
}

label {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--text-dim);
  font-weight: 500;
}

.field-group { display: flex; flex-direction: column; gap: 8px; }
.field-label { font-size: 0.88rem; color: var(--text-dim); font-weight: 500; }

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

@media (max-width: 560px) {
  .grid-2 { grid-template-columns: 1fr; }
}

.input-with-status {
  display: flex;
  align-items: center;
  gap: 10px;
}

.input-with-status input { flex: 1; min-width: 0; }

.file-input-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.file-choose-btn {
  flex: 0 0 auto;
  width: fit-content;
  padding: 11px 20px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border: none;
  color: #fff;
  font-weight: 600;
  cursor: pointer;
}

.file-choose-btn:hover { filter: brightness(1.08); }

.file-name {
  color: var(--text-dim);
  font-size: 0.88rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.url-status {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-dim);
}

.url-status.ok { color: var(--success); }
.url-status.loading { color: var(--accent); }

.url-clear-btn {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  padding: 0;
  border-radius: 50%;
  font-size: 0.8rem;
  background: var(--bg-input);
  border: 1px solid var(--border);
  color: var(--text-dim);
  box-shadow: none;
}

.url-clear-btn:hover { color: var(--text); border-color: var(--border-hover); }
.url-clear-btn[hidden] { display: none; }

.spinner {
  display: inline-block;
  width: 15px;
  height: 15px;
  border: 2px solid rgba(139, 147, 167, 0.25);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.hint {
  font-size: 0.78rem;
  color: var(--text-dim);
  opacity: 0.8;
}

.hint.hint-error { color: var(--error); opacity: 1; }

input.field-invalid {
  border-color: var(--error);
  box-shadow: 0 0 0 3px rgba(255, 107, 125, 0.18);
}

input, select, button {
  font-family: inherit;
  font-size: 0.96rem;
  padding: 11px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-input);
  color: var(--text);
  transition: border-color 0.15s, box-shadow 0.15s;
  width: 100%;
}

input:hover, select:hover { border-color: var(--border-hover); }

input::placeholder { color: var(--text-dim); opacity: 0.7; }

input:focus, select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(91, 124, 255, 0.18);
}

input[type="checkbox"], input[type="radio"] {
  width: auto;
  padding: 0;
  accent-color: var(--accent);
}

input[type="checkbox"] {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
}

.checkbox-row {
  flex-direction: row;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 400;
}

.advanced-toggle-row { margin-top: -4px; }

.advanced-panel {
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.02);
}

.advanced-panel[hidden] { display: none; }

/* Segmented control for mode selection */
.segmented {
  display: flex;
  gap: 6px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 4px;
}

.segment {
  flex: 1;
  margin: 0;
  cursor: pointer;
}

.segment input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.segment span {
  display: block;
  text-align: center;
  padding: 9px 10px;
  border-radius: 7px;
  color: var(--text-dim);
  font-size: 0.86rem;
  font-weight: 500;
  transition: background 0.15s, color 0.15s;
}

.segment:hover span { color: var(--text); }

.segment:has(input:checked) span {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
}

button {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border: none;
  color: white;
  font-weight: 600;
  cursor: pointer;
  width: fit-content;
  padding: 12px 22px;
  box-shadow: 0 8px 20px -8px rgba(91, 124, 255, 0.5);
}

button:hover { filter: brightness(1.08); }
button:active { transform: translateY(1px); }

.btn-primary { align-self: flex-start; }

.btn-download {
  display: inline-flex;
  align-items: center;
  align-self: flex-start;
  gap: 8px;
  text-decoration: none;
  margin-top: 8px;
  padding: 12px 22px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--success), #2fae7a);
  color: #fff;
  font-weight: 600;
  box-shadow: 0 8px 20px -8px rgba(62, 207, 142, 0.5);
  transition: filter 0.15s, transform 0.05s;
}

.btn-download:hover { filter: brightness(1.08); }
.btn-download:active { transform: translateY(1px); }
.btn-download svg { flex-shrink: 0; }

.status-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 8px;
}

.status-actions .btn-download,
.status-actions .btn-convert {
  margin-top: 0;
}

.btn-convert {
  display: inline-flex;
  align-items: center;
  align-self: flex-start;
  gap: 8px;
  text-decoration: none;
  margin-top: 8px;
  padding: 12px 22px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--accent-2), var(--accent));
  color: #fff;
  font-weight: 600;
  box-shadow: 0 8px 20px -8px rgba(143, 91, 255, 0.5);
  transition: filter 0.15s, transform 0.05s;
}

.btn-convert:hover { filter: brightness(1.08); }
.btn-convert:active { transform: translateY(1px); }
.btn-convert svg { flex-shrink: 0; }

.link-btn {
  background: none;
  border: none;
  color: var(--error);
  padding: 0;
  font-size: 0.85rem;
  text-decoration: underline;
  cursor: pointer;
  width: auto;
  box-shadow: none;
}

.inline-form { display: inline; margin-left: 10px; }

.mini-input {
  width: 130px;
  padding: 6px 10px;
  font-size: 0.82rem;
}

#status-box { margin-top: 18px; }

.status-card { padding: 18px 22px; }

.progress {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 6px;
  height: 8px;
  overflow: hidden;
  margin-top: 8px;
}

.progress-bar {
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  height: 100%;
  transition: width 0.3s;
}

.progress-bar.indeterminate {
  width: 40% !important;
  animation: progress-slide 1.2s ease-in-out infinite;
}

@keyframes progress-slide {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(250%); }
}

.success { color: var(--success); margin: 0; font-weight: 500; }
.error { color: var(--error); margin: 0; font-weight: 500; }

.table-wrap { overflow-x: auto; padding: 0; }

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

.table th, .table td {
  text-align: left;
  padding: 13px 20px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

.table tr:last-child td { border-bottom: none; }
.table tbody tr:hover { background: rgba(255, 255, 255, 0.02); }

.metadata-table td:last-child {
  white-space: normal;
  word-break: break-word;
  max-width: 480px;
}

.metadata-table td.removable {
  background: rgba(255, 107, 125, 0.12);
  color: var(--error);
  font-weight: 500;
}

.metadata-table td.protected-ai {
  background: rgba(232, 179, 57, 0.15);
  color: var(--warning);
  font-weight: 500;
}

.metadata-table td.protected {
  background: rgba(62, 207, 142, 0.12);
  color: var(--success);
  font-weight: 500;
}

.metadata-table td.empty {
  color: var(--text-dim);
  opacity: 0.6;
}

.table th {
  color: var(--text-dim);
  font-weight: 600;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 0.76rem;
  font-weight: 600;
  background: rgba(139, 147, 167, 0.15);
  color: var(--text-dim);
  text-transform: capitalize;
}

.badge-finished { background: rgba(62, 207, 142, 0.15); color: var(--success); }
.badge-error { background: rgba(255, 107, 125, 0.15); color: var(--error); }
.badge-downloading, .badge-converting, .badge-queued { background: rgba(91, 124, 255, 0.15); color: var(--accent); }

.admin-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.admin-header a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.9rem;
}

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

.admin-tabs {
  display: flex;
  gap: 4px;
  border-bottom: 1px solid var(--border);
  margin: 18px 0 24px;
  overflow-x: auto;
}

.admin-tab-btn {
  background: none;
  border: none;
  box-shadow: none;
  color: var(--text-dim);
  font-weight: 500;
  font-size: 0.92rem;
  padding: 10px 16px;
  border-radius: 0;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
  width: auto;
}

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

.admin-tab-btn.active {
  color: var(--text);
  border-bottom-color: var(--accent);
}

.tab-panel[hidden] { display: none; }

.period-tabs {
  display: flex;
  gap: 6px;
  margin-top: 14px;
  flex-wrap: wrap;
}

.period-tab-btn {
  background: var(--bg-input);
  border: 1px solid var(--border);
  color: var(--text-dim);
  font-weight: 500;
  font-size: 0.82rem;
  padding: 7px 14px;
  border-radius: 20px;
  width: auto;
  box-shadow: none;
}

.period-tab-btn:hover { color: var(--text); border-color: var(--border-hover); }

.period-tab-btn.active {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-color: transparent;
  color: #fff;
}

.period-panel[hidden] { display: none; }
.period-panel { margin-top: 12px; }

section h3 { margin: 22px 0 4px; font-size: 1rem; }

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 14px;
  margin-top: 18px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat-value { font-size: 1.7rem; font-weight: 800; letter-spacing: -0.02em; }
.stat-label { color: var(--text-dim); font-size: 0.82rem; }

.settings-group-title {
  margin: 10px 0 -6px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-dim);
}

.settings-group-title:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

.maintenance-actions {
  flex-direction: row;
  flex-wrap: wrap;
}

.maintenance-actions form { margin: 0; }

.login-page {
  min-height: calc(100vh - 200px);
  display: flex;
  align-items: center;
  justify-content: center;
}

.login-box {
  width: 100%;
  max-width: 360px;
  text-align: center;
}

.login-box h1 { margin-bottom: 18px; }

.login-form { width: 100%; margin-top: 8px; text-align: left; }

/* Recent downloads list */

.dl-list { gap: 0; padding: 6px 0; }

.dl-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  border-bottom: 1px solid var(--border);
}

.dl-row:last-child { border-bottom: none; }

.status-icon {
  flex: 0 0 auto;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 700;
  background: rgba(139, 147, 167, 0.15);
  color: var(--text-dim);
}

.status-icon.status-finished { background: rgba(62, 207, 142, 0.15); color: var(--success); }
.status-icon.status-error { background: rgba(255, 107, 125, 0.15); color: var(--error); }
.status-icon.status-downloading,
.status-icon.status-converting,
.status-icon.status-queued { background: rgba(91, 124, 255, 0.15); color: var(--accent); }

.dl-download-btn {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  text-decoration: none;
  box-shadow: none;
}

.dl-download-btn:hover { filter: brightness(1.08); }

.dl-download-btn.disabled {
  background: var(--bg-input);
  color: var(--text-dim);
  opacity: 0.5;
  pointer-events: none;
}

.dl-convert-btn {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-2), var(--accent));
  color: #fff;
  text-decoration: none;
  box-shadow: none;
}

.dl-convert-btn:hover { filter: brightness(1.08); }

.dl-source-btn {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  font-size: 0.9rem;
  text-decoration: none;
  background: var(--bg-input);
  border: 1px solid var(--border);
}

.dl-source-btn:hover { border-color: var(--border-hover); }

.dl-title {
  flex: 1;
  min-width: 0;
  text-align: left;
  background: none;
  border: none;
  padding: 0;
  color: var(--text);
  font: inherit;
  font-size: 0.9rem;
  font-weight: 400;
  cursor: pointer;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  width: auto;
  box-shadow: none;
}

.dl-title.expanded {
  white-space: normal;
  overflow: visible;
  text-overflow: clip;
  word-break: break-word;
}

.empty-hint {
  color: var(--text-dim);
  font-size: 0.9rem;
  padding: 20px;
  margin: 0;
  text-align: center;
}

.back-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-dim);
  text-decoration: none;
  margin-bottom: 18px;
}

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

.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}

.tool-card {
  background: linear-gradient(180deg, var(--bg-card), rgba(21, 24, 34, 0.85));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
  box-shadow: 0 12px 30px -18px rgba(0, 0, 0, 0.6);
  transition: border-color 0.15s, transform 0.15s;
}

a.tool-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.tool-card.disabled {
  opacity: 0.5;
  cursor: default;
}

.tool-icon {
  font-size: 1.6rem;
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
}

.tool-card.disabled .tool-icon {
  background: var(--bg-input);
  color: var(--text-dim);
}

.tool-name { font-size: 1.05rem; font-weight: 700; }
.tool-desc { font-size: 0.85rem; color: var(--text-dim); }

/* Mobile */

@media (max-width: 640px) {
  .topbar { padding: 14px 16px; }
  .brand { font-size: 0.95rem; }
  .brand-icon { width: 24px; height: 24px; font-size: 0.8rem; }
  .topbar nav a { margin-left: 14px; font-size: 0.86rem; }

  .container { padding: 22px 14px 60px; }

  h1 { font-size: 1.4rem; }
  .hero-sub { font-size: 0.9rem; }

  .card { padding: 16px; gap: 14px; }

  .segmented { flex-direction: column; }
  .segment { flex: 1 1 auto; }
  .segment span { padding: 10px 8px; font-size: 0.8rem; }

  .table th, .table td { padding: 10px 12px; font-size: 0.82rem; }

  .dl-row { padding: 10px 14px; gap: 8px; }
  .dl-title { font-size: 0.85rem; }

  .login-page { min-height: calc(100vh - 150px); }
}