/* ── Reset & Base ──────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

.hidden { display: none !important; }

:root {
  --ink:     #0A0A0A;
  --ink-60:  rgba(10,10,10,.6);
  --ink-40:  rgba(10,10,10,.4);
  --ink-20:  rgba(10,10,10,.2);
  --ink-10:  rgba(10,10,10,.1);
  --ink-06:  rgba(10,10,10,.06);
  --ink-04:  rgba(10,10,10,.04);
  --surface: #FAFAFA;
  --white:   #ffffff;
  --radius-sm: 8px;
  --radius:    12px;
  --radius-lg: 16px;
  --font: 'Inter', 'Noto Sans SC', system-ui, sans-serif;
}

html, body {
  height: 100%;
  background: var(--surface);
  color: var(--ink);
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* dot-grid background */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 0;
  background-image: radial-gradient(circle, rgba(0,0,0,.08) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
}

/* spotlight */
#spotlight {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: radial-gradient(480px circle at var(--mx,50%) var(--my,50%), rgba(0,0,0,.028), transparent 70%);
}

::-webkit-scrollbar { width: 4px; height: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--ink-20); border-radius: 2px; }

/* ── Auth page ──────────────────────────────────────────────────────────────── */
.page { position: relative; z-index: 1; }
.page.hidden { display: none !important; }

.page-auth {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.auth-card {
  width: 100%;
  max-width: 380px;
  background: var(--white);
  border: 1px solid var(--ink-10);
  border-radius: var(--radius-lg);
  padding: 36px 32px 32px;
  box-shadow: 0 1px 3px rgba(0,0,0,.04), 0 12px 48px rgba(0,0,0,.06);
}

.auth-header { text-align: center; margin-bottom: 28px; }

.logo-text {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -.04em;
  color: var(--ink);
}
.logo-hash { color: var(--ink-40); }
.logo-dot  { color: var(--ink); font-size: 10px; vertical-align: super; }
.tagline   { margin-top: 6px; font-size: 13px; color: var(--ink-40); }

.tab-switcher {
  display: flex;
  border: 1px solid var(--ink-10);
  border-radius: var(--radius-sm);
  padding: 3px;
  margin-bottom: 24px;
  background: var(--surface);
}
.tab-btn {
  flex: 1;
  padding: 7px;
  border: none;
  background: transparent;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
  color: var(--ink-40);
  cursor: pointer;
  transition: all .15s;
}
.tab-btn.active {
  background: var(--white);
  color: var(--ink);
  box-shadow: 0 1px 3px rgba(0,0,0,.08);
}

.field-group { display: flex; flex-direction: column; gap: 10px; margin-bottom: 16px; }

.floating-field { position: relative; }
.floating-field input {
  width: 100%;
  padding: 14px 12px 6px;
  border: 1px solid var(--ink-10);
  border-radius: var(--radius-sm);
  background: var(--surface);
  font-family: var(--font);
  font-size: 14px;
  color: var(--ink);
  outline: none;
  transition: border-color .15s, box-shadow .15s;
}
.floating-field input:focus {
  border-color: var(--ink);
  box-shadow: 0 0 0 3px rgba(0,0,0,.06);
}
.floating-field label {
  position: absolute;
  top: 50%;
  left: 12px;
  transform: translateY(-50%);
  font-size: 13px;
  color: var(--ink-40);
  pointer-events: none;
  transition: all .15s;
}
.floating-field.filled label,
.floating-field input:focus ~ label {
  top: 8px;
  transform: none;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--ink-40);
}

.field-error {
  font-size: 12px;
  color: #c0392b;
  margin-top: -6px;
  margin-bottom: 4px;
}

/* ── Buttons ────────────────────────────────────────────────────────────────── */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 18px;
  background: var(--ink);
  color: var(--white);
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: -.01em;
  cursor: pointer;
  transition: opacity .15s, transform .1s;
  box-shadow: 0 1px 4px rgba(0,0,0,.14);
}
.btn-primary:hover  { opacity: .88; }
.btn-primary:active { transform: scale(.98); }
.btn-primary:disabled { opacity: .4; cursor: not-allowed; transform: none; }

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 14px;
  background: var(--ink-06);
  color: var(--ink);
  border: 1px solid var(--ink-10);
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: background .15s;
}
.btn-secondary:hover { background: var(--ink-10); }

.btn-lg { padding: 12px 18px; font-size: 14px; }
.w-full { width: 100%; }

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px; height: 32px;
  border: 1px solid rgba(255,255,255,.3);
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,.15);
  color: #fff;
  cursor: pointer;
  transition: background .15s;
  backdrop-filter: blur(4px);
}
.icon-btn svg { width: 15px; height: 15px; }
.icon-btn:hover { background: rgba(255,255,255,.25); }

@keyframes shake {
  0%,100% { transform: translateX(0); }
  20%,60% { transform: translateX(-6px); }
  40%,80% { transform: translateX(6px); }
}
.shake { animation: shake .35s ease; }

/* ── Navbar ─────────────────────────────────────────────────────────────────── */
.navbar {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  padding: 0 24px;
  height: 52px;
  background: rgba(250,250,250,.88);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--ink-10);
}

.nav-logo { margin-right: 24px; }
.logo-text-sm { font-size: 15px; font-weight: 800; letter-spacing: -.04em; }

.nav-links { display: flex; gap: 2px; flex: 1; }
.nav-btn {
  padding: 5px 12px;
  border: none;
  background: transparent;
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 13px;
  font-weight: 500;
  color: var(--ink-40);
  cursor: pointer;
  transition: color .15s, background .15s;
}
.nav-btn:hover { color: var(--ink); background: var(--ink-06); }
.nav-btn.active { color: var(--ink); background: var(--ink-10); }

.nav-right {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: auto;
}
.user-chip  { font-size: 12px; font-weight: 600; color: var(--ink-60); }
.today-count { font-size: 11px; color: var(--ink-40); }

.btn-logout {
  padding: 4px 10px;
  border: 1px solid var(--ink-10);
  border-radius: var(--radius-sm);
  background: transparent;
  font-family: var(--font);
  font-size: 12px;
  color: var(--ink-40);
  cursor: pointer;
  transition: color .15s, border-color .15s;
}
.btn-logout:hover { color: var(--ink); border-color: var(--ink-20); }

/* ── Main layout ────────────────────────────────────────────────────────────── */
.page-main { min-height: 100vh; display: flex; flex-direction: column; }
.view-content { flex: 1; }
.view-content.hidden { display: none !important; }

.two-col {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 20px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 24px 40px;
  align-items: start;
}

/* ── Panel cards ────────────────────────────────────────────────────────────── */
.left-panel, .right-panel {
  background: var(--white);
  border: 1px solid var(--ink-10);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: 0 1px 2px rgba(0,0,0,.04), 0 4px 20px rgba(0,0,0,.04);
}

.panel-title {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: -.01em;
  margin-bottom: 20px;
}

.form-group { margin-bottom: 18px; }

.field-label {
  display: block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--ink-40);
  margin-bottom: 8px;
}

/* ── Textarea ───────────────────────────────────────────────────────────────── */
.textarea-wrap { position: relative; }

.prompt-textarea {
  width: 100%;
  min-height: 96px;
  max-height: 380px;
  padding: 10px 12px 24px;
  border: 1px solid var(--ink-10);
  border-radius: var(--radius-sm);
  background: var(--surface);
  font-family: var(--font);
  font-size: 13px;
  color: var(--ink);
  resize: none;
  outline: none;
  line-height: 1.6;
  transition: border-color .15s, box-shadow .15s;
}
.prompt-textarea:focus {
  border-color: var(--ink);
  box-shadow: 0 0 0 3px rgba(0,0,0,.06);
}
.prompt-textarea::placeholder { color: var(--ink-20); }

.char-count {
  position: absolute;
  bottom: 8px;
  right: 10px;
  font-size: 10px;
  color: var(--ink-20);
  pointer-events: none;
}

/* ── Pill groups ────────────────────────────────────────────────────────────── */
.pill-group {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}

.pill {
  padding: 4px 9px;
  border: 1px solid var(--ink-10);
  border-radius: 100px;
  background: transparent;
  font-family: var(--font);
  font-size: 11px;
  font-weight: 500;
  color: var(--ink-40);
  cursor: pointer;
  transition: all .15s;
  white-space: nowrap;
}
.pill:hover  { border-color: var(--ink-20); color: var(--ink); }
.pill.active { background: var(--ink); border-color: var(--ink); color: var(--white); }

/* ── Toggle rows ────────────────────────────────────────────────────────────── */
.toggle-section { border-top: 1px solid var(--ink-06); padding-top: 14px; margin-top: 2px; }
.toggle-section-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--ink-40);
  margin-bottom: 10px;
}

.toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 0;
}
.toggle-text {}
.toggle-label { font-size: 12px; font-weight: 500; color: var(--ink-60); }
.toggle-sub   { font-size: 11px; color: var(--ink-40); margin-top: 1px; }

.toggle {
  position: relative;
  width: 36px;
  height: 20px;
  flex-shrink: 0;
}
.toggle input { opacity: 0; width: 0; height: 0; }

.toggle-track {
  position: absolute;
  inset: 0;
  background: var(--ink-10);
  border-radius: 10px;
  cursor: pointer;
  transition: background .2s;
}
.toggle input:checked ~ .toggle-track { background: var(--ink); }

.toggle-thumb {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 14px;
  height: 14px;
  background: var(--white);
  border-radius: 50%;
  box-shadow: 0 1px 3px rgba(0,0,0,.2);
  transition: transform .2s;
  pointer-events: none;
}
.toggle input:checked ~ .toggle-track .toggle-thumb { transform: translateX(16px); }

/* ── Generate button ────────────────────────────────────────────────────────── */
.btn-generate { height: 44px; font-size: 14px; border-radius: var(--radius-sm); letter-spacing: -.015em; }

.keyboard-hint { text-align: center; font-size: 11px; color: var(--ink-20); margin-top: 8px; }

/* ── Rate limit ─────────────────────────────────────────────────────────────── */
.rate-limit-wrap { margin-top: 20px; padding-top: 18px; border-top: 1px solid var(--ink-06); }
.rate-label {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--ink-40);
  margin-bottom: 6px;
}
.rate-text { font-weight: 600; color: var(--ink-60); }
.rate-bar-bg { height: 3px; background: var(--ink-06); border-radius: 2px; overflow: hidden; }
.rate-bar    { height: 100%; background: var(--ink); border-radius: 2px; transition: width .4s ease; }

/* ── Stats ──────────────────────────────────────────────────────────────────── */
.stats-row {
  display: grid;
  grid-template-columns: repeat(3,1fr);
  gap: 8px;
  margin-top: 14px;
}
.stat-pill {
  padding: 10px 8px;
  background: var(--surface);
  border: 1px solid var(--ink-06);
  border-radius: var(--radius-sm);
  text-align: center;
}
.stat-val   { display: block; font-size: 15px; font-weight: 700; letter-spacing: -.02em; }
.stat-label { display: block; font-size: 10px; color: var(--ink-40); margin-top: 2px; }

/* ── Right panel states ─────────────────────────────────────────────────────── */
.right-panel { min-height: 520px; display: flex; flex-direction: column; padding: 0; }

.panel-state {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.panel-state.hidden { display: none !important; }

/* empty */
.state-empty { gap: 12px; padding: 40px; }
.empty-icon  { width: 40px; height: 40px; color: var(--ink-20); }
.empty-title { font-size: 15px; font-weight: 600; color: var(--ink-60); letter-spacing: -.01em; }
.empty-sub   { font-size: 13px; color: var(--ink-40); }

/* loading */
.state-loading { gap: 16px; }

@keyframes spin { to { transform: rotate(360deg); } }
.spin-ring {
  width: 28px; height: 28px;
  border: 2.5px solid var(--ink-10);
  border-top-color: var(--ink);
  border-radius: 50%;
  animation: spin .8s linear infinite;
}
.loading-msg     { font-size: 13px; font-weight: 500; color: var(--ink-60); }
.loading-elapsed { font-size: 12px; color: var(--ink-40); }

.progress-wrap {
  width: 200px; height: 2px;
  background: var(--ink-06);
  border-radius: 1px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  background: var(--ink);
  border-radius: 1px;
  transition: width .3s ease;
}

/* result */
.state-result { justify-content: flex-start; }

.result-image-wrap {
  position: relative;
  width: 100%;
  flex: 1;
  background: var(--surface);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  overflow: hidden;
  min-height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.result-img {
  max-width: 100%;
  max-height: 560px;
  object-fit: contain;
  display: block;
  opacity: 0;
  transition: opacity .4s ease;
}
.result-img.loaded { opacity: 1; }

.result-overlay {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 16px;
  background: linear-gradient(transparent, rgba(0,0,0,.5));
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 8px;
}
.result-prompt-short {
  font-size: 12px;
  color: rgba(255,255,255,.8);
  flex: 1;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}
.result-actions { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }
.result-time {
  font-size: 11px;
  font-weight: 600;
  color: rgba(255,255,255,.7);
  background: rgba(0,0,0,.25);
  padding: 3px 7px;
  border-radius: 100px;
}

.result-footer {
  width: 100%;
  padding: 12px 16px;
  border-top: 1px solid var(--ink-06);
}
.expand-btn {
  background: none; border: none;
  font-family: var(--font);
  font-size: 12px; color: var(--ink-40);
  cursor: pointer; padding: 0;
  transition: color .15s;
}
.expand-btn:hover { color: var(--ink); }
.result-full-prompt { margin-top: 8px; font-size: 13px; color: var(--ink-60); line-height: 1.6; }

/* ── Gallery ────────────────────────────────────────────────────────────────── */
.gallery-header {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 24px 16px;
  display: flex;
  align-items: center;
}
.gallery-title { font-size: 15px; font-weight: 700; letter-spacing: -.02em; }
.gallery-badge {
  margin-left: 8px;
  font-size: 12px;
  font-weight: 500;
  color: var(--ink-40);
  background: var(--ink-06);
  padding: 2px 8px;
  border-radius: 100px;
}

.masonry-grid {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px,1fr));
  grid-auto-rows: 10px;
  gap: 16px;
}

.gallery-card {
  position: relative;
  background: var(--white);
  border: 1px solid var(--ink-06);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  transition: box-shadow .2s, transform .2s;
}
.gallery-card:hover { box-shadow: 0 4px 20px rgba(0,0,0,.1); transform: translateY(-2px); }
.gallery-card img { width: 100%; display: block; }
.card-info { padding: 10px 12px 12px; }
.card-prompt {
  font-size: 12px; color: var(--ink-60);
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  line-height: 1.5;
}
.card-meta { display: flex; justify-content: space-between; margin-top: 6px; }
.card-time  { font-size: 10px; color: var(--ink-20); }
.card-ratio {
  font-size: 10px; font-weight: 600; color: var(--ink-40);
  background: var(--ink-06); padding: 1px 6px; border-radius: 4px;
}

.card-delete {
  position: absolute; top: 8px; right: 8px;
  width: 24px; height: 24px;
  background: rgba(255,255,255,.85);
  border: 1px solid var(--ink-10);
  border-radius: 6px;
  font-size: 10px; color: var(--ink-40);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  opacity: 0;
  transition: opacity .15s, background .15s;
  backdrop-filter: blur(4px);
}
.gallery-card:hover .card-delete { opacity: 1; }
.card-delete:hover { background: var(--white); color: var(--ink); }
.card-delete.confirm {
  width: auto; padding: 4px 8px;
  font-size: 10px;
  background: #c0392b; color: #fff;
  border-color: #c0392b;
  border-radius: var(--radius-sm);
  opacity: 1;
}

.gallery-empty-wrap { padding: 0 24px; max-width: 1200px; margin: 0 auto; }
.gallery-empty {
  text-align: center; padding: 60px 24px;
  border: 1px solid var(--ink-10);
  border-radius: var(--radius-lg);
  background: var(--white);
}
.gallery-empty h3 { font-size: 15px; font-weight: 600; color: var(--ink-60); }
.gallery-empty p  { font-size: 13px; color: var(--ink-40); margin: 8px 0 20px; }
.text-muted { color: var(--ink-40); }

.pagination {
  display: flex; justify-content: center;
  gap: 6px; padding: 24px;
  max-width: 1200px; margin: 0 auto;
}
.page-btn {
  padding: 6px 12px;
  border: 1px solid var(--ink-10);
  border-radius: var(--radius-sm);
  background: var(--white);
  font-family: var(--font);
  font-size: 13px; color: var(--ink-40);
  cursor: pointer; transition: all .15s;
}
.page-btn:hover:not(:disabled) { border-color: var(--ink); color: var(--ink); }
.page-btn.active { background: var(--ink); color: var(--white); border-color: var(--ink); }
.page-btn:disabled { opacity: .3; cursor: not-allowed; }

/* ── Lightbox ───────────────────────────────────────────────────────────────── */
.lightbox {
  position: fixed; inset: 0; z-index: 200;
  background: rgba(10,10,10,.72);
  backdrop-filter: blur(8px);
  display: flex; align-items: center; justify-content: center;
  padding: 24px;
  opacity: 0; transition: opacity .25s;
}
.lightbox.show { opacity: 1; }

.lightbox-inner {
  display: flex; gap: 20px;
  max-width: 1100px; width: 100%;
  max-height: 90vh;
}
.lightbox-inner img {
  flex: 1; max-height: 90vh;
  object-fit: contain;
  border-radius: var(--radius-lg);
  display: block;
}

.lightbox-sidebar {
  width: 280px; flex-shrink: 0;
  background: var(--white);
  border: 1px solid var(--ink-10);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex; flex-direction: column;
  overflow-y: auto;
}

.section-label {
  font-size: 10px; font-weight: 700;
  letter-spacing: .06em; text-transform: uppercase;
  color: var(--ink-40); margin-bottom: 8px;
}
.lightbox-prompt-text { font-size: 13px; color: var(--ink-60); line-height: 1.6; }
.divider { border: none; border-top: 1px solid var(--ink-06); margin: 16px 0; }
.lightbox-meta { display: flex; flex-direction: column; gap: 8px; }
.meta-row { display: flex; justify-content: space-between; align-items: center; }
.meta-label { font-size: 11px; color: var(--ink-40); }
.meta-value { font-size: 12px; font-weight: 600; color: var(--ink-60); }
.lightbox-actions {
  display: flex; flex-direction: column; gap: 8px;
  margin-top: auto; padding-top: 16px;
}

.lightbox-close {
  position: absolute; top: 20px; right: 20px;
  width: 36px; height: 36px;
  background: rgba(250,250,250,.9);
  border: 1px solid var(--ink-10);
  border-radius: 50%;
  font-size: 13px; color: var(--ink);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: background .15s;
  backdrop-filter: blur(8px);
}
.lightbox-close:hover { background: var(--white); }

/* ── Toast ──────────────────────────────────────────────────────────────────── */
.toast-container {
  position: fixed;
  bottom: 24px; right: 24px;
  z-index: 300;
  display: flex; flex-direction: column; gap: 8px;
}

.toast {
  display: flex; align-items: stretch;
  background: var(--white);
  border: 1px solid var(--ink-10);
  border-radius: var(--radius);
  box-shadow: 0 4px 24px rgba(0,0,0,.1);
  overflow: hidden;
  min-width: 280px; max-width: 360px;
  opacity: 0; transform: translateY(8px);
  transition: opacity .2s, transform .2s;
  position: relative;
}
.toast.show { opacity: 1; transform: translateY(0); }
.toast.hide { opacity: 0; transform: translateY(8px); }

.toast-bar            { width: 3px; flex-shrink: 0; }
.toast-bar-success    { background: #22c55e; }
.toast-bar-error      { background: #ef4444; }
.toast-bar-warning    { background: #f59e0b; }

.toast-content  { flex: 1; padding: 12px 14px; }
.toast-title    { font-size: 12px; font-weight: 700; color: var(--ink); margin-bottom: 2px; }
.toast-message  { font-size: 12px; color: var(--ink-60); }

.toast-progress {
  position: absolute; bottom: 0; left: 3px;
  height: 2px; background: var(--ink-10);
}

/* ── Footer ─────────────────────────────────────────────────────────────────── */
.app-footer {
  text-align: center;
  padding: 16px;
  font-size: 11px;
  color: var(--ink-20);
  border-top: 1px solid var(--ink-06);
  margin-top: auto;
}