:root {
  --bg: #f4f7fb;
  --surface: #ffffff;
  --surface-soft: #f8fafc;
  --text: #0f172a;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --primary: #4f46e5;
  --primary-soft: #e0e7ff;
  --success: #16a34a;
  --danger: #dc2626;
  --shadow: 0 10px 25px rgba(15, 23, 42, 0.08);
}

body.dark {
  --bg: #070b16;
  --surface: #111827;
  --surface-soft: #0b1220;
  --text: #e5e7eb;
  --text-muted: #94a3b8;
  --border: #1f2937;
  --primary: #818cf8;
  --primary-soft: #312e81;
  --success: #22c55e;
  --danger: #f87171;
  --shadow: 0 10px 25px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", "Segoe UI", system-ui, sans-serif;
  transition: background-color 0.25s ease, color 0.25s ease;
}

.app-shell {
  display: grid;
  grid-template-columns: minmax(280px, 340px) minmax(0, 1fr) minmax(280px, 360px);
  gap: 1rem;
  min-height: 100vh;
  padding: 1rem;
}

.panel {
  min-width: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 1rem;
  box-shadow: var(--shadow);
}

.panel-left,
.panel-center,
.panel-right {
  display: flex;
  flex-direction: column;
}

.panel-left,
.panel-right {
  gap: 0.85rem;
}

.panel-center {
  gap: 1rem;
}

.kicker {
  margin: 0;
  color: var(--primary);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.panel-head h1 {
  margin: 0.25rem 0 0;
  font-size: 1.1rem;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

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

.field span {
  color: var(--text-muted);
  font-size: 0.78rem;
  font-weight: 600;
}

input {
  width: 100%;
  margin: 0;
  background: var(--surface-soft);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.65rem 0.75rem;
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

input:focus {
  outline: none;
  border-color: var(--primary);
  transform: translateY(-1px);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.16);
}

input.error {
  border-color: var(--danger);
  animation: shake 0.2s linear;
}

.actions {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.6rem;
}

.toolbar {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.6rem;
}

.btn {
  border: 1px solid transparent;
  border-radius: 12px;
  padding: 0.65rem 0.8rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.2s ease, opacity 0.2s ease, filter 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
  filter: brightness(0.95);
}

.btn-primary {
  background: var(--primary);
  color: #ffffff;
}

.btn-success {
  background: var(--success);
  color: #ffffff;
}

.btn-ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}

.btn-soft {
  background: var(--primary-soft);
  color: var(--text);
}

.btn-danger {
  background: var(--danger);
  color: #ffffff;
}

.mode-pill {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0 0.7rem;
  color: var(--text-muted);
  font-size: 0.77rem;
}

.card {
  background: var(--surface-soft);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1rem;
}

.card h2 {
  margin: 0;
  font-size: 1rem;
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.preview-card {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 0.9rem;
  align-items: start;
}

.preview-card img {
  width: 120px;
  height: 120px;
  object-fit: cover;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--surface);
}

.preview-meta h3 {
  margin: 0;
  font-size: 1rem;
}

.preview-meta p {
  margin: 0.3rem 0;
  color: var(--text-muted);
}

.preview-meta a {
  color: var(--primary);
  text-decoration: none;
  word-break: break-all;
  font-size: 0.85rem;
}

.output-box {
  margin: 0;
  min-height: 190px;
  max-height: 320px;
  overflow: auto;
  white-space: pre-wrap;
  word-break: break-word;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
  padding: 0.9rem;
}

.saved-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 28px;
  height: 28px;
  background: var(--primary-soft);
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 700;
}

.saved-list {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  overflow: auto;
  min-height: 180px;
}

.item {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 0.7rem;
  padding: 0.7rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface-soft);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.item:hover {
  transform: translateY(-1px);
  border-color: var(--primary);
}

.item img {
  width: 64px;
  height: 64px;
  object-fit: cover;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface);
}

.item h4 {
  margin: 0 0 0.2rem;
  font-size: 0.92rem;
}

.meta {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.8rem;
}

.item-actions {
  display: flex;
  gap: 0.45rem;
  margin-top: 0.45rem;
}

.item-actions .btn {
  flex: 1;
  padding: 0.45rem 0.55rem;
  font-size: 0.78rem;
}

.empty-state {
  border: 1px dashed var(--border);
  border-radius: 12px;
  color: var(--text-muted);
  text-align: center;
  padding: 1rem;
}

.toast {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 1000;
  background: var(--text);
  color: #ffffff;
  border-radius: 10px;
  padding: 0.65rem 0.9rem;
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1100px) {
  .app-shell {
    grid-template-columns: 1fr 1fr;
  }

  .panel-right {
    grid-column: 1 / -1;
    max-height: 390px;
  }
}

@media (max-width: 760px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .actions,
  .toolbar {
    grid-template-columns: 1fr;
  }

  .preview-card {
    grid-template-columns: 1fr;
  }

  .preview-card img {
    width: 100%;
    height: 180px;
  }
}

@keyframes shake {
  0% { transform: translateX(0); }
  50% { transform: translateX(4px); }
  100% { transform: translateX(0); }
}