/* ─── Base ─── */
:root {
  --bg: #0a0a0f;
  --bg-2: #111118;
  --surface: rgba(255,255,255,0.03);
  --surface-2: rgba(255,255,255,0.06);
  --surface-3: rgba(255,255,255,0.09);
  --border: rgba(255,255,255,0.08);
  --border-hover: rgba(255,255,255,0.15);
  --text: #e8e8ed;
  --text-2: #a0a0b0;
  --text-3: #6a6a7a;
  --accent: #7c5cfc;
  --accent-glow: rgba(124,92,252,0.25);
  --accent-2: #5ce1e6;
  --success: #34d399;
  --success-bg: rgba(52,211,153,0.1);
  --warning: #fbbf24;
  --warning-bg: rgba(251,191,36,0.1);
  --error: #f87171;
  --error-bg: rgba(248,113,113,0.1);
  --radius: 16px;
  --radius-sm: 10px;
  --radius-xs: 6px;
  --shadow: 0 8px 32px rgba(0,0,0,0.4);
  --shadow-lg: 0 16px 64px rgba(0,0,0,0.5);
  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ─── Ambient Background ─── */
.bg-glow {
  position: fixed;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.15;
  pointer-events: none;
  z-index: 0;
}
.bg-glow-1 {
  width: 600px; height: 600px;
  background: var(--accent);
  top: -200px; right: -100px;
}
.bg-glow-2 {
  width: 500px; height: 500px;
  background: var(--accent-2);
  bottom: -150px; left: -100px;
}

/* ─── App Container ─── */
.app {
  position: relative;
  z-index: 1;
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 1.5rem 3rem;
}

/* ─── Header ─── */
.header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 2rem;
  gap: 1rem;
}
.logo { display: flex; align-items: flex-start; gap: 0.75rem; }
.logo-icon { font-size: 2rem; margin-top: 2px; }
.logo h1 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #fff 0%, #a0a0b0 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.subtitle {
  font-size: 0.85rem;
  color: var(--text-3);
  margin-top: 0.25rem;
  font-weight: 400;
}

/* ─── Engine Pill ─── */
.engine-pill {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.85rem;
  border-radius: 100px;
  font-size: 0.78rem;
  font-weight: 500;
  white-space: nowrap;
  backdrop-filter: blur(12px);
}
.engine-ready {
  background: var(--success-bg);
  color: var(--success);
  border: 1px solid rgba(52,211,153,0.2);
}
.engine-offline {
  background: var(--error-bg);
  color: var(--error);
  border: 1px solid rgba(248,113,113,0.2);
}
.engine-processing {
  background: var(--accent-glow);
  color: var(--accent);
  border: 1px solid rgba(124,92,252,0.2);
}
.engine-login {
  background: var(--warning-bg);
  color: var(--warning);
  border: 1px solid rgba(251,191,36,0.2);
}
.pulse-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: currentColor;
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

/* ─── Glass Cards ─── */
.glass {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow);
  transition: border-color var(--transition);
}
.glass:hover { border-color: var(--border-hover); }

.card { padding: 1.5rem; margin-bottom: 1rem; }
.card-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1rem; }
.card-header h2 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-2);
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

/* ─── Notice ─── */
.notice {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
  border-radius: var(--radius-sm);
  margin-bottom: 1.5rem;
  font-size: 0.85rem;
  backdrop-filter: blur(12px);
}
.notice-icon { font-size: 1.5rem; flex-shrink: 0; }
.notice strong { display: block; margin-bottom: 0.15rem; }
.notice p { color: var(--text-3); font-size: 0.8rem; margin: 0; }
.notice-warning {
  background: var(--warning-bg);
  border: 1px solid rgba(251,191,36,0.15);
  color: var(--warning);
}
.notice .btn { flex-shrink: 0; margin-left: auto; }

/* ─── Source Tabs ─── */
.source-tabs { display: flex; gap: 0.25rem; background: var(--surface-2); border-radius: var(--radius-xs); padding: 3px; }
.tab {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.45rem 0.9rem;
  border: none;
  background: transparent;
  color: var(--text-3);
  font-size: 0.82rem;
  font-weight: 500;
  border-radius: 7px;
  cursor: pointer;
  transition: all var(--transition);
  font-family: inherit;
}
.tab:hover { color: var(--text-2); }
.tab.active {
  background: var(--surface-3);
  color: var(--text);
  box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}
.tab-icon { font-size: 0.9rem; }
.tab-content { display: none; }
.tab-content.active { display: block; }

/* ─── File Drop ─── */
.file-drop {
  border: 2px dashed var(--border);
  border-radius: var(--radius-sm);
  padding: 2rem 1.5rem;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition);
  position: relative;
}
.file-drop:hover { border-color: var(--accent); background: rgba(124,92,252,0.03); }
.file-drop.has-file { border-color: var(--success); background: rgba(52,211,153,0.03); }
.file-drop input { display: none; }
.file-drop-inner { display: flex; flex-direction: column; align-items: center; gap: 0.75rem; }
.file-icon-wrap {
  width: 56px; height: 56px;
  border-radius: 50%;
  background: var(--surface-2);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-3);
}
.file-drop:hover .file-icon-wrap { color: var(--accent); background: var(--accent-glow); }
.drop-text { font-size: 0.9rem; color: var(--text-2); }
.drop-link { color: var(--accent); font-weight: 500; }
.drop-hint { font-size: 0.75rem; color: var(--text-3); }

.file-name {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.75rem;
  padding: 0.6rem 0.85rem;
  background: var(--surface-2);
  border-radius: var(--radius-xs);
  font-size: 0.85rem;
  color: var(--text);
}
.file-name-icon { font-size: 1rem; }
.file-remove {
  margin-left: auto;
  background: none;
  border: none;
  color: var(--text-3);
  cursor: pointer;
  font-size: 0.9rem;
  padding: 0.2rem;
}
.file-remove:hover { color: var(--error); }

/* ─── URL Input ─── */
.url-input-wrap {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0 1rem;
  transition: border-color var(--transition);
}
.url-input-wrap:focus-within { border-color: var(--accent); }
.url-icon { color: var(--text-3); flex-shrink: 0; }
.url-input-wrap input {
  flex: 1;
  background: none;
  border: none;
  color: var(--text);
  font-size: 0.9rem;
  padding: 0.85rem 0;
  outline: none;
  font-family: inherit;
}
.url-input-wrap input::placeholder { color: var(--text-3); }

/* ─── Task Grid ─── */
.task-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
}
.task-option {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  padding: 1rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
  text-align: center;
}
.task-option input { display: none; }
.task-option:hover { border-color: var(--border-hover); background: var(--surface-2); }
.task-option:has(input:checked) {
  border-color: var(--accent);
  background: var(--accent-glow);
  box-shadow: 0 0 20px rgba(124,92,252,0.1);
}
.task-icon { font-size: 1.5rem; }
.task-name { font-size: 0.78rem; font-weight: 500; color: var(--text-2); }
.task-option:has(input:checked) .task-name { color: var(--text); }

/* ─── Custom Prompt ─── */
.custom-prompt-wrap {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}
.custom-prompt {
  width: 100%;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.85rem 1rem;
  color: var(--text);
  font-size: 0.9rem;
  font-family: inherit;
  resize: vertical;
  min-height: 80px;
  outline: none;
  transition: border-color var(--transition);
}
.custom-prompt:focus { border-color: var(--accent); }
.custom-prompt::placeholder { color: var(--text-3); }

/* ─── Buttons ─── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.6rem 1.2rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-xs);
  background: var(--surface-2);
  color: var(--text);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  font-family: inherit;
}
.btn:hover { background: var(--surface-3); border-color: var(--border-hover); }
.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.btn-primary:hover { background: #6a4ae0; }
.btn-glow {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  box-shadow: 0 0 20px var(--accent-glow);
}
.btn-glow:hover { box-shadow: 0 0 30px var(--accent-glow); background: #6a4ae0; }
.btn-outline {
  background: transparent;
  border-color: var(--border);
  color: var(--text-2);
}
.btn-outline:hover { border-color: var(--accent); color: var(--accent); }
.btn-ghost {
  background: transparent;
  border: none;
  color: var(--text-3);
}
.btn-ghost:hover { color: var(--accent); }
.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-generate {
  width: 100%;
  padding: 1rem;
  background: linear-gradient(135deg, var(--accent) 0%, #5ce1e6 100%);
  border: none;
  border-radius: var(--radius-sm);
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  font-family: inherit;
  box-shadow: 0 4px 20px rgba(124,92,252,0.3);
}
.btn-generate:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 30px rgba(124,92,252,0.4);
}
.btn-generate:active { transform: translateY(0); }
.btn-generate:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}
.btn-content {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

/* ─── Status Timeline ─── */
.status-card { padding-bottom: 1rem; }
.status-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}
.status-header h2 { margin: 0; }
.elapsed {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  background: var(--accent-glow);
  padding: 0.25rem 0.65rem;
  border-radius: 100px;
}
.status-timeline {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.timeline-step {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  padding: 0.6rem 0;
  position: relative;
}
.timeline-step:not(:last-child)::after {
  content: '';
  position: absolute;
  left: 11px;
  top: 2rem;
  bottom: -0.6rem;
  width: 2px;
  background: var(--border);
}
.timeline-step.done::after { background: var(--success); }
.timeline-step.active::after {
  background: linear-gradient(to bottom, var(--accent), var(--border));
}
.step-dot {
  width: 24px; height: 24px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  background: var(--surface-2);
  border: 2px solid var(--border);
  transition: all var(--transition);
  margin-top: 1px;
}
.step-dot span {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: transparent;
  transition: all var(--transition);
}
.timeline-step.done .step-dot {
  background: var(--success);
  border-color: var(--success);
}
.timeline-step.done .step-dot span { background: #fff; }
.timeline-step.active .step-dot {
  border-color: var(--accent);
  background: var(--accent-glow);
  box-shadow: 0 0 12px var(--accent-glow);
}
.timeline-step.active .step-dot span {
  background: var(--accent);
  animation: dotPulse 1.5s ease-in-out infinite;
}
.timeline-step.error .step-dot {
  background: var(--error-bg);
  border-color: var(--error);
}
.timeline-step.error .step-dot span { background: var(--error); }
@keyframes dotPulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.3); opacity: 0.7; }
}
.step-info { display: flex; flex-direction: column; gap: 0.1rem; }
.step-label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-3);
  transition: color var(--transition);
}
.timeline-step.active .step-label { color: var(--text); }
.timeline-step.done .step-label { color: var(--success); }
.step-sub {
  font-size: 0.72rem;
  color: var(--text-3);
  opacity: 0.6;
}
.timeline-step.active .step-sub { opacity: 1; }
.status-text {
  margin-top: 1rem;
  font-size: 0.85rem;
  color: var(--text-2);
  text-align: center;
}

/* ─── Error Box ─── */
.error-box {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.75rem;
  padding: 0.75rem 1rem;
  background: var(--error-bg);
  border: 1px solid rgba(248,113,113,0.15);
  border-radius: var(--radius-xs);
  color: var(--error);
  font-size: 0.82rem;
}

/* ─── Result Card ─── */
.result-card { border-color: rgba(52,211,153,0.15); }
.result-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
  gap: 1rem;
  flex-wrap: wrap;
}
.result-header h2 {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--success);
}
.result-header h2 svg { stroke: var(--success); }
.result-actions { display: flex; gap: 0.5rem; }
.result-meta {
  font-size: 0.78rem;
  color: var(--text-3);
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
}
.result-content {
  background: var(--surface-2);
  border-radius: var(--radius-sm);
  padding: 1.25rem;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--text);
  white-space: pre-wrap;
  word-wrap: break-word;
  max-height: 600px;
  overflow-y: auto;
}
.result-content::-webkit-scrollbar { width: 6px; }
.result-content::-webkit-scrollbar-track { background: transparent; }
.result-content::-webkit-scrollbar-thumb { background: var(--surface-3); border-radius: 3px; }
.btn-new-task {
  width: 100%;
  margin-top: 1rem;
  padding: 0.75rem;
}

/* ─── Footer ─── */
.footer {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  text-align: center;
}
.footer p { font-size: 0.75rem; color: var(--text-3); }

/* ─── Spinner ─── */
.spinner {
  display: inline-block;
  width: 16px; height: 16px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ─── Utilities ─── */
.hidden { display: none !important; }

/* ─── Responsive ─── */
@media (max-width: 640px) {
  .app { padding: 1rem; }
  .header { flex-direction: column; gap: 0.75rem; }
  .logo h1 { font-size: 1.2rem; }
  .task-grid { grid-template-columns: repeat(2, 1fr); }
  .result-header { flex-direction: column; align-items: flex-start; }
}