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

:root {
  --bg:       #ffffff;
  --surface:  #f8fafc;
  --surface2: #f1f5f9;
  --border:   #e2e8f0;
  --text:     #0f172a;
  --muted:    #64748b;
  --accent:   #6366f1;
  --accent-d: #4f46e5;
  --green:    #059669;
  --danger:   #dc2626;
  font-family: Inter, "Segoe UI", Arial, sans-serif;
}

html, body { min-height: 100%; background: var(--bg); color: var(--text); }

.hidden { display: none !important; }

/* ── Auth overlay ── */
.auth-overlay {
  position: fixed; inset: 0; background: rgba(255,255,255,.96);
  display: flex; align-items: center; justify-content: center; z-index: 100;
  backdrop-filter: blur(8px);
}
.auth-card {
  background: var(--bg); border: 1px solid var(--border);
  border-radius: 16px; padding: 40px 36px; width: 100%; max-width: 360px;
  display: flex; flex-direction: column; gap: 12px;
  box-shadow: 0 4px 24px rgba(99,102,241,0.08);
}
.auth-logo { font-size: 22px; font-weight: 800; color: var(--accent); text-align: center; margin-bottom: 4px; }
.auth-card h2 { font-size: 18px; font-weight: 700; text-align: center; }
.auth-card input {
  height: 42px; padding: 0 14px; background: var(--surface);
  border: 1px solid var(--border); border-radius: 8px; color: var(--text);
  font: inherit; font-size: 14px; outline: none; transition: border-color .15s, box-shadow .15s;
}
.auth-card input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(99,102,241,.1); }
.auth-error { font-size: 12px; color: var(--danger); min-height: 16px; }
.auth-card p { font-size: 12px; color: var(--muted); text-align: center; }
.auth-card a { color: var(--accent); text-decoration: none; }

/* ── Header ── */
.header {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; gap: 24px;
  padding: 0 32px; height: 60px;
  background: rgba(255,255,255,0.95); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.logo { font-size: 17px; font-weight: 800; color: var(--accent); text-decoration: none; }
.app-nav { display: flex; align-items: center; gap: 2px; }
.nav-pill {
  padding: 6px 14px; border-radius: 8px; font-size: 13px; font-weight: 500;
  color: var(--muted); text-decoration: none; transition: all .15s;
  border: 1px solid transparent;
}
.nav-pill:hover { color: var(--text); background: var(--surface); }
.nav-pill.active { background: rgba(99,102,241,.08); color: var(--accent); border-color: rgba(99,102,241,.2); font-weight: 600; }
.header-user { margin-left: auto; display: flex; align-items: center; gap: 12px; }
.hc-badge {
  font-size: 13px; font-weight: 700; color: var(--accent);
  background: rgba(99,102,241,.08); border: 1px solid rgba(99,102,241,.2);
  padding: 4px 10px; border-radius: 20px;
}
.user-email { font-size: 13px; color: var(--muted); }
.btn-logout-sm {
  font-size: 13px; font-weight: 500; color: var(--muted); background: transparent;
  border: 1px solid var(--border); border-radius: 8px; padding: 5px 12px; cursor: pointer;
  transition: all .15s;
}
.btn-logout-sm:hover { color: var(--danger); border-color: rgba(220,38,38,.3); }

/* ── Main layout ── */
.main { max-width: 840px; margin: 0 auto; padding: 40px 24px 60px; }

/* ── Generator card ── */
.generator-card {
  background: var(--bg); border: 1px solid var(--border);
  border-radius: 20px; padding: 36px;
  box-shadow: 0 2px 16px rgba(0,0,0,0.04);
  margin-bottom: 36px;
}
.gen-title { font-size: 26px; font-weight: 800; letter-spacing: -0.5px; margin-bottom: 6px; }
.gen-sub { font-size: 14px; color: var(--muted); margin-bottom: 24px; }

/* ── Prompt area ── */
.prompt-area {
  border: 1.5px solid var(--border); border-radius: 14px;
  overflow: hidden; transition: border-color .15s, box-shadow .15s;
}
.prompt-area:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(99,102,241,.1);
}
.prompt-area textarea {
  width: 100%; padding: 16px 18px;
  border: none; outline: none; resize: none;
  font: inherit; font-size: 14px; color: var(--text);
  background: var(--bg); line-height: 1.6;
  min-height: 90px;
}
.prompt-area textarea::placeholder { color: var(--muted); }
.prompt-controls {
  display: flex; align-items: center; flex-wrap: wrap; gap: 10px;
  padding: 12px 16px; background: var(--surface);
  border-top: 1px solid var(--border);
}
.control-group { display: flex; flex-direction: column; gap: 2px; }
.control-group label { font-size: 10px; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); }
.control-group select, .control-group input {
  height: 34px; padding: 0 10px;
  background: var(--bg); border: 1px solid var(--border); border-radius: 8px;
  color: var(--text); font: inherit; font-size: 13px; outline: none;
  transition: border-color .15s;
}
.control-group select:focus, .control-group input:focus { border-color: var(--accent); }
.control-group input { width: 72px; }
.btn-generate {
  margin-left: auto; display: inline-flex; align-items: center; gap: 8px;
  height: 40px; padding: 0 20px;
  background: var(--accent); color: #fff; border: none; border-radius: 10px;
  font: inherit; font-size: 14px; font-weight: 700; cursor: pointer;
  transition: background .15s, transform .1s, box-shadow .15s;
  white-space: nowrap;
}
.btn-generate:hover:not(:disabled) {
  background: var(--accent-d);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(99,102,241,.35);
}
.btn-generate:disabled { opacity: 0.5; cursor: not-allowed; }

/* ── Result area ── */
.result-area { margin-top: 24px; }

.phase-indicator {
  display: flex; align-items: center; gap: 12px;
  padding: 16px 20px; background: var(--surface);
  border: 1px solid var(--border); border-radius: 12px;
  margin-bottom: 16px;
}
.phase { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--muted); }
.phase-icon { font-size: 18px; }
.phase.active { color: var(--text); font-weight: 600; }
.phase.active .phase-icon { animation: spin 1.5s linear infinite; display: inline-block; }
.phase.done { color: var(--green); }
.phase-arrow { color: var(--border); font-size: 16px; }
@keyframes spin { to { transform: rotate(360deg); } }

.enhanced-prompt {
  padding: 14px 16px; background: rgba(99,102,241,.04);
  border: 1px solid rgba(99,102,241,.2); border-radius: 10px;
  font-size: 13px; line-height: 1.65; margin-bottom: 16px; color: var(--text);
}
.ep-label { font-weight: 700; color: var(--accent); margin-right: 6px; }

.image-result { text-align: center; }
.image-result img {
  max-width: 100%; border-radius: 14px;
  border: 1px solid var(--border);
  box-shadow: 0 8px 32px rgba(0,0,0,0.08);
}
.image-actions {
  display: flex; justify-content: center; gap: 12px; margin-top: 16px;
}
.btn-secondary {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 9px 18px; background: var(--bg); border: 1.5px solid var(--border);
  border-radius: 10px; font: inherit; font-size: 13px; font-weight: 600;
  color: var(--text); cursor: pointer; text-decoration: none;
  transition: border-color .15s, color .15s;
}
.btn-secondary:hover { border-color: var(--accent); color: var(--accent); }

.error-box {
  padding: 14px 16px; background: rgba(220,38,38,.06);
  border: 1px solid rgba(220,38,38,.25); border-radius: 10px;
  font-size: 13px; color: var(--danger);
}

/* ── History ── */
.history-section { margin-top: 48px; }
.history-title { font-size: 16px; font-weight: 800; letter-spacing: -0.3px; margin-bottom: 20px; }
.history-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 16px;
}
.history-empty { color: var(--muted); font-size: 14px; grid-column: 1/-1; text-align: center; padding: 32px 0; }

.history-item {
  position: relative; border-radius: 14px; overflow: hidden;
  border: 1px solid var(--border);
  cursor: pointer; transition: transform .2s, box-shadow .2s;
  background: var(--surface);
}
.history-item:hover { transform: translateY(-3px); box-shadow: 0 8px 24px rgba(0,0,0,0.08); }
.history-item img { width: 100%; aspect-ratio: 1; object-fit: cover; display: block; }
.history-item-overlay {
  position: absolute; bottom: 0; left: 0; right: 0;
  background: linear-gradient(to top, rgba(255,255,255,.95) 0%, transparent 100%);
  padding: 24px 10px 10px;
}
.history-item-prompt { font-size: 11px; color: var(--text); font-weight: 500; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.history-item-status { font-size: 10px; color: var(--muted); margin-top: 2px; }
.history-item-actions { display: flex; gap: 6px; margin-top: 6px; }
.btn-hist {
  flex: 1; padding: 4px 0; background: var(--bg); border: 1px solid var(--border);
  border-radius: 6px; font: inherit; font-size: 11px; font-weight: 600; color: var(--muted);
  cursor: pointer; text-align: center; text-decoration: none; transition: all .15s;
}
.btn-hist:hover { border-color: var(--accent); color: var(--accent); }
.history-generating {
  background: var(--surface); border-radius: 14px; padding: 20px;
  border: 1px dashed var(--border); text-align: center;
}
.history-gen-prompt { font-size: 12px; color: var(--text); font-weight: 500; margin-bottom: 8px; }
.history-gen-status { font-size: 12px; color: var(--muted); }
.dots-anim::after {
  content: '...'; animation: dots 1.2s steps(3) infinite;
}
@keyframes dots { 0%{content:'.'} 33%{content:'..'} 66%{content:'...'} }

/* ── Footer ── */
.footer {
  background: var(--surface); border-top: 1px solid var(--border);
  padding: 20px 32px; display: flex; align-items: center; justify-content: space-between;
  font-size: 13px; color: var(--muted);
}
.footer-nav { display: flex; gap: 20px; }
.footer-nav a { color: var(--muted); text-decoration: none; transition: color .15s; }
.footer-nav a:hover { color: var(--accent); }

/* ── Enhance toggle ── */
.enhance-toggle { flex-direction: row; align-items: center; gap: 8px; }
.toggle-switch { position: relative; display: inline-block; width: 40px; height: 22px; cursor: pointer; }
.toggle-switch input { opacity: 0; width: 0; height: 0; }
.toggle-track {
  position: absolute; inset: 0; border-radius: 22px;
  background: var(--border); transition: background .2s;
}
.toggle-track::before {
  content: ''; position: absolute;
  width: 16px; height: 16px; left: 3px; bottom: 3px;
  border-radius: 50%; background: #fff;
  transition: transform .2s; box-shadow: 0 1px 3px rgba(0,0,0,.15);
}
.toggle-switch input:checked + .toggle-track { background: var(--accent); }
.toggle-switch input:checked + .toggle-track::before { transform: translateX(18px); }

/* ── Cost breakdown ── */
.cost-breakdown {
  margin-top: 12px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 12px; padding: 14px 18px;
  font-size: 13px;
}
.cost-row {
  display: flex; justify-content: space-between; align-items: center;
  padding: 4px 0; color: var(--muted);
}
.cost-total {
  display: flex; justify-content: space-between; align-items: center;
  padding: 10px 0 4px; margin-top: 6px;
  border-top: 1px solid var(--border);
  font-weight: 700; color: var(--text);
  font-size: 14px;
}
.cost-row span:last-child, .cost-total span:last-child { font-weight: 600; color: var(--accent); }

/* ── Pricing table ── */
.pricing-details { margin-top: 20px; }
.pricing-summary {
  font-size: 13px; font-weight: 600; color: var(--muted);
  cursor: pointer; padding: 10px 0; list-style: none;
  transition: color .15s;
}
.pricing-summary:hover { color: var(--text); }
.pricing-table-wrap { margin-top: 14px; overflow-x: auto; }
.pricing-table {
  width: 100%; border-collapse: collapse; font-size: 13px;
}
.pricing-table th {
  text-align: left; padding: 10px 14px;
  background: var(--surface2); color: var(--muted);
  font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .06em;
  border-bottom: 1px solid var(--border);
}
.pricing-table th:first-child { border-radius: 8px 0 0 8px; }
.pricing-table th:last-child  { border-radius: 0 8px 8px 0; }
.pricing-table td {
  padding: 10px 14px; border-bottom: 1px solid var(--border);
  color: var(--text);
}
.pricing-table tr:last-child td { border-bottom: none; }
.pricing-table tr:hover td { background: var(--surface); }
.pricing-table td.val { font-weight: 600; color: var(--accent); }
.pricing-table td.worker { font-weight: 600; color: var(--green); }
.pricing-note {
  font-size: 11px; color: var(--muted); margin-top: 10px; padding: 10px 14px;
  background: var(--surface); border-radius: 8px; line-height: 1.6;
}

/* ── Btn primary ── */
.btn-primary {
  height: 42px; background: var(--accent); color: #fff;
  border: none; border-radius: 8px; font: inherit; font-size: 14px; font-weight: 600;
  cursor: pointer; transition: background .15s; width: 100%;
}
.btn-primary:hover { background: var(--accent-d); }

/* ── Delete button on history ── */
.btn-delete { color: var(--muted); }
.btn-delete:hover { border-color: rgba(220,38,38,.4); color: var(--danger) !important; }

/* ── Retry button ── */
.btn-retry { color: var(--muted); }
.btn-retry:hover { border-color: rgba(99,102,241,.4); color: var(--accent) !important; }

@media (max-width: 600px) {
  .header { padding: 0 16px; }
  .main { padding: 24px 16px 48px; }
  .generator-card { padding: 24px 16px; }
  .prompt-controls { flex-direction: column; align-items: flex-start; }
  .btn-generate { margin-left: 0; width: 100%; justify-content: center; }
}