/* ═══════════════════════════════════════════════
   Image Studio - Modern UI
   ═══════════════════════════════════════════════ */

:root {
  --bg: #0a0a0a;
  --bg-card: #141414;
  --bg-elevated: #1a1a1a;
  --bg-input: #1e1e1e;
  --border: #2a2a2a;
  --border-focus: #8B5CF6;
  --text: #f5f5f5;
  --text-muted: #888;
  --text-dim: #666;
  --accent: #8B5CF6;
  --accent-hover: #7c3aed;
  --danger: #ef4444;
  --success: #22c55e;
  --warning: #f59e0b;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 20px;
  --shadow: 0 4px 24px rgba(0,0,0,.3);
  --font: 'Inter', 'Noto Sans SC', -apple-system, sans-serif;
  --navbar-h: 60px;
}

[data-theme="light"] {
  --bg: #fafafa;
  --bg-card: #ffffff;
  --bg-elevated: #ffffff;
  --bg-input: #f3f4f6;
  --border: #e5e7eb;
  --border-focus: #8B5CF6;
  --text: #111827;
  --text-muted: #6b7280;
  --text-dim: #9ca3af;
  --shadow: 0 4px 24px rgba(0,0,0,.08);
}

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

html, body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

/* ── Navbar ── */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--navbar-h);
  background: rgba(10,10,10,.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  z-index: 100;
}
[data-theme="light"] .navbar {
  background: rgba(255,255,255,.85);
}
.navbar-inner {
  max-width: 1200px;
  margin: 0 auto;
  height: 100%;
  display: flex;
  align-items: center;
  padding: 0 24px;
}
.navbar-left { flex: 1; }
.navbar-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
  font-weight: 700;
  font-size: 16px;
}
.navbar-center {
  display: flex;
  gap: 4px;
}
.nav-link {
  background: none;
  border: none;
  color: var(--text-muted);
  padding: 8px 16px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  transition: all .2s;
}
.nav-link:hover { color: var(--text); background: var(--bg-elevated); }
.nav-link.is-active { color: var(--text); background: var(--bg-elevated); }
.navbar-right {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
}
.navbar-user { font-size: 13px; color: var(--text-muted); }
.nav-btn-outline {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 6px 14px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 13px;
  transition: all .2s;
}
.nav-btn-outline:hover { border-color: var(--text-muted); color: var(--text); }

/* ── Page Content ── */
.page-content {
  padding-top: var(--navbar-h);
  min-height: 100vh;
}
.page-section {
  display: none;
  padding: 0 24px 60px;
  max-width: 1200px;
  margin: 0 auto;
}
.page-section.is-active { display: block; }

/* ── Hero ── */
.hero {
  position: relative;
  text-align: center;
  padding: 80px 20px 40px;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: -40px;
  background: radial-gradient(ellipse at 50% 0%, rgba(139,92,246,.15) 0%, transparent 60%),
              radial-gradient(ellipse at 80% 50%, rgba(236,72,153,.08) 0%, transparent 40%),
              radial-gradient(ellipse at 20% 50%, rgba(59,130,246,.08) 0%, transparent 40%);
  pointer-events: none;
}
[data-theme="light"] .hero-bg {
  background: radial-gradient(ellipse at 50% 0%, rgba(139,92,246,.12) 0%, transparent 60%),
              radial-gradient(ellipse at 80% 50%, rgba(236,72,153,.06) 0%, transparent 40%),
              radial-gradient(ellipse at 20% 50%, rgba(59,130,246,.06) 0%, transparent 40%);
}
.hero-content { position: relative; }
.hero-title {
  font-size: clamp(32px, 6vw, 56px);
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: 12px;
}
.hero-title em {
  font-style: normal;
  background: linear-gradient(135deg, #8B5CF6, #ec4899);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-subtitle {
  color: var(--text-muted);
  font-size: 16px;
  max-width: 500px;
  margin: 0 auto;
}

/* ── Generate Bar ── */
.gen-bar-wrap {
  max-width: 680px;
  margin: 0 auto 40px;
  padding: 0 20px;
}
.gen-bar {
  display: flex;
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 6px 6px 6px 16px;
  gap: 8px;
  box-shadow: var(--shadow);
  transition: border-color .2s;
}
.gen-bar:focus-within { border-color: var(--accent); }
.gen-bar-model select {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 10px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  text-transform: uppercase;
}
.gen-bar-input {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 6px;
}
.gen-bar-input textarea {
  flex: 1;
  border: none;
  background: none;
  resize: none;
  font-size: 14px;
  line-height: 1.5;
  padding: 8px 0;
  outline: none;
  color: var(--text);
  min-height: 40px;
  max-height: 200px;
  overflow-y: auto;
}
.gen-bar-input textarea::placeholder { color: var(--text-dim); }
.gen-icon-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 6px;
  border-radius: 6px;
  display: flex;
  transition: all .2s;
}
.gen-icon-btn:hover { color: var(--accent); background: rgba(139,92,246,.1); }
.gen-bar-submit {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 14px;
  padding: 10px 24px;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  transition: all .2s;
  white-space: nowrap;
}
.gen-bar-submit:hover { background: var(--accent-hover); }
.gen-bar-submit:disabled { opacity: .5; cursor: not-allowed; }
.gen-bar-submit .btn-spinner {
  display: inline-block;
  width: 14px; height: 14px;
  border: 2px solid rgba(255,255,255,.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin .6s linear infinite;
}

/* Options row */
.gen-options {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-top: 16px;
  flex-wrap: wrap;
}
.gen-opt {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text-muted);
}
.gen-opt select {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 8px;
  font-size: 12px;
  color: var(--text);
  cursor: pointer;
}

/* ── Section Headers ── */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 40px 0 20px;
  gap: 12px;
}
.section-header h2, .section-header h3 {
  font-size: 20px;
  font-weight: 700;
}
.section-header small {
  color: var(--text-muted);
  font-size: 13px;
  margin-left: 8px;
}
.section-actions { display: flex; gap: 8px; }

/* ── Masonry Grid ── */
.masonry-grid {
  columns: 4;
  column-gap: 12px;
}
@media (max-width: 1024px) { .masonry-grid { columns: 3; } }
@media (max-width: 768px)  { .masonry-grid { columns: 2; } }
@media (max-width: 480px)  { .masonry-grid { columns: 2; column-gap: 8px; } }

.masonry-item {
  break-inside: avoid;
  margin-bottom: 12px;
  border-radius: var(--radius);
  overflow: hidden;
  position: relative;
  cursor: pointer;
  transition: transform .2s;
}
.masonry-item:hover { transform: scale(1.02); }
.masonry-item img {
  width: 100%;
  display: block;
  border-radius: var(--radius);
}
.masonry-item .item-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,.6) 0%, transparent 50%);
  opacity: 0;
  transition: opacity .2s;
  display: flex;
  align-items: flex-end;
  padding: 12px;
  border-radius: var(--radius);
}
.masonry-item:hover .item-overlay { opacity: 1; }
.item-overlay-actions {
  display: flex;
  gap: 8px;
}
.item-overlay-actions button,
.item-overlay-actions a {
  background: rgba(255,255,255,.15);
  backdrop-filter: blur(8px);
  border: none;
  color: #fff;
  width: 32px; height: 32px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  text-decoration: none;
  transition: background .2s;
}
.item-overlay-actions button:hover,
.item-overlay-actions a:hover { background: rgba(255,255,255,.3); }

/* ── Results Grid (jobs) ── */
.results-grid {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.job-block {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.job-block-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  font-size: 13px;
  border-bottom: 1px solid var(--border);
}
.job-prompt {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--text-muted);
}
.job-status { display: flex; align-items: center; gap: 8px; color: var(--accent); }
.job-spinner {
  width: 12px; height: 12px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin .7s linear infinite;
}
.job-elapsed { font-size: 12px; color: var(--text-muted); }
.job-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 8px;
  padding: 12px;
}
.result-card {
  position: relative;
  border-radius: var(--radius-sm);
  overflow: hidden;
  cursor: pointer;
}
.result-card img {
  width: 100%;
  display: block;
}
.result-card-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,.4);
  opacity: 0;
  transition: opacity .2s;
  display: flex;
  align-items: center;
  justify-content: center;
}
.result-card:hover .result-card-overlay { opacity: 1; }
.overlay-actions { display: flex; gap: 8px; }
.overlay-btn {
  background: rgba(255,255,255,.2);
  backdrop-filter: blur(4px);
  border: none;
  color: #fff;
  width: 36px; height: 36px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  text-decoration: none;
}
.overlay-btn:hover { background: rgba(255,255,255,.35); }
.job-block--error .job-block-header { border-bottom-color: var(--danger); }
.job-error-msg {
  padding: 12px 16px;
  color: var(--danger);
  font-size: 13px;
}
.job-retry-btn {
  background: none;
  border: 1px solid var(--danger);
  color: var(--danger);
  padding: 4px 12px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 12px;
  margin-left: 8px;
}
.job-retry-btn:hover { background: rgba(239,68,68,.1); }

/* ── Buttons ── */
.btn-ghost {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 13px;
  transition: all .2s;
}
.btn-ghost:hover { border-color: var(--text-muted); color: var(--text); }
.btn-ghost.danger { border-color: var(--danger); color: var(--danger); }
.btn-ghost.danger:hover { background: rgba(239,68,68,.1); }
.btn-primary-sm {
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 8px 20px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  transition: all .2s;
}
.btn-primary-sm:hover { background: var(--accent-hover); }

/* ── Settings ── */
.settings-content {
  display: flex;
  flex-direction: column;
  gap: 32px;
  max-width: 700px;
}
.settings-section {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}
.settings-section h3 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.badge {
  background: var(--accent);
  color: #fff;
  font-size: 10px;
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 500;
}
.admin-only { display: none; }
.admin-only.is-visible { display: block; }
.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}
.form-field label {
  display: block;
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 6px;
  font-weight: 500;
}
.form-field input,
.form-field select {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  font-size: 13px;
  color: var(--text);
  transition: border-color .2s;
}
.form-field input:focus,
.form-field select:focus {
  outline: none;
  border-color: var(--accent);
}
.input-with-eye {
  position: relative;
}
.input-with-eye input { padding-right: 36px; }
.eye-btn {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  cursor: pointer;
  font-size: 14px;
}
.settings-actions {
  margin-top: 16px;
  display: flex;
  gap: 8px;
}
.theme-switch-row {
  display: flex;
  gap: 8px;
}
.theme-btn {
  background: var(--bg-input);
  border: 1px solid var(--border);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 13px;
  color: var(--text-muted);
  transition: all .2s;
}
.theme-btn.is-active {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(139,92,246,.1);
}

/* Channel editor */
.channel-item {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px;
  margin-bottom: 12px;
}
.channel-item-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}
.channel-item-title { font-weight: 600; font-size: 14px; }
.channel-item-actions { display: flex; gap: 6px; }
.channel-item-actions button {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  font-size: 14px;
}
.channel-item-actions button:hover { color: var(--danger); }
.channel-fields {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.channel-fields .form-field { margin: 0; }

/* ── Builder & Optimize Panels ── */
.builder-panel, .optimize-panel {
  display: none;
  max-width: 680px;
  margin: 0 auto 24px;
  padding: 0 20px;
}
.builder-panel.is-open, .optimize-panel.is-open { display: block; }
.builder-panel-inner, .optimize-panel-inner {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}
.builder-header, .optimize-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.builder-title, .optimize-title { font-weight: 600; font-size: 14px; }
.builder-header small, .optimize-header small { color: var(--text-muted); font-size: 12px; flex: 1; }
.close-x {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 18px;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 6px;
}
.close-x:hover { background: var(--bg-elevated); color: var(--text); }
.builder-body { margin-bottom: 16px; }
.builder-cat { margin-bottom: 14px; }
.builder-cat-title {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 8px;
  font-weight: 500;
}
.builder-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.builder-subject-input {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-input);
  color: var(--text);
  font-size: 13px;
  outline: none;
  transition: border-color .2s;
}
.builder-subject-input:focus { border-color: var(--accent); }
.builder-subject-input::placeholder { color: var(--text-dim); }
.builder-tag {
  background: var(--bg-input);
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 5px 12px;
  border-radius: 20px;
  font-size: 12px;
  cursor: pointer;
  transition: all .2s;
}
.builder-tag:hover { border-color: var(--accent); color: var(--accent); }
.builder-tag.tpl-tag {
  background: linear-gradient(135deg, rgba(139,92,246,.1), rgba(59,130,246,.1));
  border-color: rgba(139,92,246,.3);
  color: var(--text);
  font-weight: 500;
}
.builder-tag.tpl-tag:hover {
  background: linear-gradient(135deg, rgba(139,92,246,.2), rgba(59,130,246,.2));
  border-color: var(--accent);
}
.builder-tag.is-selected {
  background: rgba(139,92,246,.15);
  border-color: var(--accent);
  color: var(--accent);
}
.builder-preview {
  background: var(--bg-input);
  border-radius: var(--radius-sm);
  padding: 12px;
  margin-bottom: 12px;
}
.builder-preview-label { font-size: 11px; color: var(--text-dim); margin-bottom: 4px; }
.builder-preview-text { font-size: 13px; color: var(--text-muted); line-height: 1.5; }
.builder-footer { display: flex; gap: 8px; justify-content: flex-end; }

/* Optimize variants */
.optimize-variants { display: flex; flex-direction: column; gap: 10px; }
.optimize-variant {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  cursor: pointer;
  transition: all .2s;
}
.optimize-variant:hover { border-color: var(--accent); }
.optimize-variant-label { font-size: 11px; color: var(--accent); margin-bottom: 4px; font-weight: 600; }
.optimize-variant-text { font-size: 13px; color: var(--text); line-height: 1.5; }

/* ── Lightbox ── */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 1000;
  align-items: center;
  justify-content: center;
}
.lightbox.is-open { display: flex; }
.lightbox-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,.85);
  backdrop-filter: blur(8px);
}
.lightbox-close {
  position: absolute;
  top: 16px; right: 16px;
  background: rgba(255,255,255,.1);
  border: none;
  color: #fff;
  width: 40px; height: 40px;
  border-radius: 12px;
  font-size: 20px;
  cursor: pointer;
  z-index: 2;
}
.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(255,255,255,.1);
  border: none;
  color: #fff;
  width: 44px; height: 44px;
  border-radius: 12px;
  font-size: 24px;
  cursor: pointer;
  z-index: 2;
}
.lightbox-nav.prev { left: 16px; }
.lightbox-nav.next { right: 16px; }
.lightbox-nav:disabled { opacity: .3; cursor: default; }
.lightbox-content {
  position: relative;
  z-index: 1;
  max-width: 90vw;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.lightbox-img {
  max-width: 100%;
  max-height: 75vh;
  border-radius: var(--radius);
  object-fit: contain;
}
.lightbox-info {
  margin-top: 12px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}
.lightbox-caption {
  color: rgba(255,255,255,.7);
  font-size: 13px;
  max-width: 500px;
}

/* ── Load More ── */
.load-more-wrap {
  text-align: center;
  padding: 24px 0;
}
.load-more-info { font-size: 12px; color: var(--text-dim); margin-top: 8px; }

/* ── Toast ── */
.toast-container {
  position: fixed;
  top: 80px; right: 24px;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-width: 360px;
}
.toast {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  font-size: 13px;
  display: flex;
  align-items: center;
  gap: 8px;
  animation: slideIn .3s ease;
  box-shadow: var(--shadow);
}
.toast.is-leaving { animation: slideOut .3s ease forwards; }
.toast-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--text-muted);
  flex-shrink: 0;
}
.toast.success .toast-dot { background: var(--success); }
.toast.error .toast-dot   { background: var(--danger); }
.toast.warning .toast-dot { background: var(--warning); }

/* ── Animations ── */
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes slideIn { from { opacity: 0; transform: translateX(20px); } to { opacity: 1; transform: translateX(0); } }
@keyframes slideOut { to { opacity: 0; transform: translateX(20px); } }

/* ── Responsive ── */
@media (max-width: 768px) {
  .navbar-inner { padding: 0 16px; }
  .page-section { padding: 0 16px 40px; }
  .gen-bar-wrap { padding: 0 16px; }
  .hero { padding: 50px 16px 30px; }
  .gen-options { gap: 10px; }
  .channel-fields { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
}