:root, [data-theme="light"] {
  --color-bg:               #f5f4f0;
  --color-surface:          #f9f8f5;
  --color-surface-2:        #ffffff;
  --color-surface-offset:   #edeae5;
  --color-surface-dynamic:  #e4e1dc;
  --color-divider:          #dcd9d5;
  --color-border:           #d4d1ca;
  --color-text:             #1e1c16;
  --color-text-muted:       #6b6a65;
  --color-text-faint:       #b0afa9;
  --color-text-inverse:     #f9f8f4;
  --color-primary:          #c0392b;
  --color-primary-hover:    #a93226;
  --color-primary-active:   #8e1f1a;
  --color-primary-highlight:#fdecea;
  --color-secondary:        #2c3e50;
  --color-success:          #27ae60;
  --color-success-hover:    #219a52;
  --color-warning:          #e67e22;
  --color-danger:           #c0392b;
  --color-danger-hover:     #a93226;
  --radius-sm:   0.375rem;
  --radius-md:   0.5rem;
  --radius-lg:   0.75rem;
  --radius-xl:   1rem;
  --radius-2xl:  1.5rem;
  --radius-full: 9999px;
  --space-1: .25rem;  --space-2: .5rem;   --space-3: .75rem;
  --space-4: 1rem;    --space-5: 1.25rem; --space-6: 1.5rem;
  --space-8: 2rem;    --space-10: 2.5rem; --space-12: 3rem;
  --space-16: 4rem;   --space-20: 5rem;
  --text-xs:   clamp(.75rem,  .7rem  + .25vw, .875rem);
  --text-sm:   clamp(.875rem, .8rem  + .35vw, 1rem);
  --text-base: clamp(1rem,    .95rem + .25vw, 1.125rem);
  --text-lg:   clamp(1.125rem,1rem   + .75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,  1.2rem + 1.25vw,2.25rem);
  --shadow-sm: 0 1px 3px oklch(.18 .01 50/.08);
  --shadow-md: 0 4px 16px oklch(.18 .01 50/.12);
  --shadow-lg: 0 12px 40px oklch(.18 .01 50/.18);
  --transition: 180ms cubic-bezier(.16,1,.3,1);
  --font-display: 'Playfair Display', Georgia, serif;
  --font-body:    'Plus Jakarta Sans', 'Helvetica Neue', sans-serif;
  --content-default: 960px;
  --content-wide:   1280px;
}

[data-theme="dark"] {
  --color-bg:               #16150f;
  --color-surface:          #1c1b15;
  --color-surface-2:        #22211a;
  --color-surface-offset:   #1e1d17;
  --color-surface-dynamic:  #2a2920;
  --color-divider:          #28271f;
  --color-border:           #36352c;
  --color-text:             #d4d2ca;
  --color-text-muted:       #7a7970;
  --color-text-faint:       #555448;
  --color-text-inverse:     #1e1c16;
  --color-primary:          #e85e4e;
  --color-primary-hover:    #c94535;
  --color-primary-active:   #a82e20;
  --color-primary-highlight:#3d2520;
  --color-secondary:        #5d7fa0;
  --color-success:          #2ecc71;
  --color-success-hover:    #27b862;
  --color-warning:          #f39c12;
  --color-danger:           #e85e4e;
  --color-danger-hover:     #c94535;
  --shadow-sm: 0 1px 3px oklch(0 0 0/.25);
  --shadow-md: 0 4px 16px oklch(0 0 0/.35);
  --shadow-lg: 0 12px 40px oklch(0 0 0/.5);
}

@media (prefers-color-scheme:dark) {
  :root:not([data-theme]) {
    --color-bg:#16150f; --color-surface:#1c1b15; --color-surface-2:#22211a;
    --color-surface-offset:#1e1d17; --color-surface-dynamic:#2a2920;
    --color-divider:#28271f; --color-border:#36352c;
    --color-text:#d4d2ca; --color-text-muted:#7a7970; --color-text-faint:#555448;
    --color-text-inverse:#1e1c16; --color-primary:#e85e4e;
    --color-primary-hover:#c94535; --color-primary-highlight:#3d2520;
    --color-secondary:#5d7fa0; --color-success:#2ecc71; --color-warning:#f39c12;
    --color-danger:#e85e4e; --color-danger-hover:#c94535;
    --shadow-sm:0 1px 3px oklch(0 0 0/.25); --shadow-md:0 4px 16px oklch(0 0 0/.35);
    --shadow-lg:0 12px 40px oklch(0 0 0/.5);
  }
}

/* BASE */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-font-smoothing: antialiased; scroll-behavior: smooth; }
body {
  min-height: 100dvh;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  transition: background var(--transition), color var(--transition);
}
img, canvas { display: block; max-width: 100%; }
button { cursor: pointer; background: none; border: none; font: inherit; color: inherit; }
a { color: inherit; text-decoration: none; }
a, button, [role="button"] {
  transition: color var(--transition), background var(--transition),
    box-shadow var(--transition), transform var(--transition), border-color var(--transition);
}
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

/* APP SHELL */
.app { display: flex; flex-direction: column; min-height: 100dvh; }

/* HEADER */
.header {
  position: sticky; top: 0; z-index: 100;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  padding: var(--space-3) var(--space-6);
  display: flex; align-items: center; justify-content: space-between; gap: var(--space-4);
}
.header-brand { display: flex; align-items: center; gap: var(--space-3); flex-shrink: 0; }
.header-logo  { display: flex; align-items: center; color: var(--color-primary); }
.header-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.2;
}
.header-title span { color: var(--color-primary); }
.header-subtitle {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: .06em;
  text-transform: uppercase;
}
.header-controls { display: flex; align-items: center; gap: var(--space-2); }

/* CONTAINER */
.container { max-width: var(--content-default); margin-inline: auto; padding-inline: var(--space-6); width: 100%; }
.container-wide { max-width: var(--content-wide); }

/* MAIN CONTENT */
.main-content { flex: 1; padding-block: var(--space-10); }

/* PAGE HEADER */
.page-header { margin-bottom: var(--space-8); }
.page-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}
.page-subtitle { font-size: var(--text-sm); color: var(--color-text-muted); }

/* BUTTONS */
.btn {
  display: inline-flex; align-items: center; gap: var(--space-2);
  padding: var(--space-2) var(--space-5);
  border-radius: var(--radius-md);
  font-size: var(--text-sm); font-weight: 600;
  cursor: pointer; border: none; white-space: nowrap;
  transition: background var(--transition), transform var(--transition),
    box-shadow var(--transition), color var(--transition);
}
.btn:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn:active { transform: translateY(0); box-shadow: none; }
.btn-sm { padding: var(--space-1) var(--space-3); font-size: var(--text-xs); }
.btn-full { width: 100%; justify-content: center; }
.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover { background: var(--color-primary-hover); }
.btn-ghost {
  background: transparent; color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}
.btn-ghost:hover { background: var(--color-surface-offset); color: var(--color-text); }
.btn-danger { background: var(--color-danger); color: #fff; border: none; }
.btn-danger:hover { background: var(--color-danger-hover); }
.btn-success { background: var(--color-success); color: #fff; border: none; }
.btn-icon {
  width: 36px; height: 36px; padding: 0;
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius-md);
}
.btn-icon:hover { background: var(--color-surface-offset); }
.btn-icon svg { width: 18px; height: 18px; }

/* CATALOG GRID (public listing) */
.catalog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(260px, 100%), 1fr));
  gap: var(--space-6);
}
.catalog-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  display: flex; flex-direction: column;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}
.catalog-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.catalog-card-cover {
  aspect-ratio: 3/4;
  background: linear-gradient(135deg, var(--color-primary-highlight), var(--color-surface-offset));
  display: flex; align-items: center; justify-content: center;
  position: relative;
}
.catalog-card-icon { color: var(--color-primary); opacity: .5; }
.catalog-card-icon svg { width: 72px; height: 72px; }
.catalog-pages-badge {
  position: absolute; top: var(--space-3); right: var(--space-3);
  background: var(--color-primary); color: #fff;
  font-size: var(--text-xs); font-weight: 700;
  padding: 2px var(--space-2);
  border-radius: var(--radius-full);
}
.catalog-card-body { flex: 1; padding: var(--space-4); }
.catalog-card-title {
  font-size: var(--text-base); font-weight: 700;
  color: var(--color-text); margin-bottom: var(--space-2);
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.catalog-card-desc {
  font-size: var(--text-xs); color: var(--color-text-muted);
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
  margin-bottom: var(--space-3);
}
.catalog-card-meta {
  display: flex; gap: var(--space-4);
  font-size: var(--text-xs); color: var(--color-text-faint);
}
.catalog-card-footer { padding: var(--space-4); padding-top: 0; }

/* EMPTY STATE */
.empty-state {
  display: flex; flex-direction: column; align-items: center;
  text-align: center; padding: var(--space-20) var(--space-8);
  color: var(--color-text-muted);
}
.empty-state svg { width: 56px; height: 56px; color: var(--color-text-faint); margin-bottom: var(--space-4); }
.empty-state h3 { font-size: var(--text-lg); color: var(--color-text); margin-bottom: var(--space-2); }
.empty-state p { font-size: var(--text-sm); max-width: 32ch; }

/* FOOTER */
.footer {
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
  padding: var(--space-6);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-align: center;
}

/* TOAST */
.toast-container {
  position: fixed; bottom: var(--space-6); right: var(--space-6);
  z-index: 9999; display: flex; flex-direction: column; gap: var(--space-3);
}
.toast {
  background: var(--color-secondary); color: #fff;
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-lg);
  font-size: var(--text-sm); font-weight: 600;
  box-shadow: var(--shadow-lg);
  display: flex; align-items: center; gap: var(--space-3);
  min-width: 200px; max-width: 360px;
  animation: toastIn .35s cubic-bezier(.16,1,.3,1);
}
.toast.success { background: var(--color-success); }
.toast.error   { background: var(--color-danger);  }
.toast.warning { background: var(--color-warning); color: #fff; }
.toast svg { flex-shrink: 0; width: 16px; height: 16px; }
@keyframes toastIn {
  from { opacity: 0; transform: translateX(24px) scale(.95); }
  to   { opacity: 1; transform: translateX(0) scale(1); }
}
@keyframes toastOut {
  from { opacity: 1; }
  to   { opacity: 0; transform: translateX(24px); }
}

/* FORM ELEMENTS */
.form-group { margin-bottom: var(--space-5); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); }
.form-label {
  display: block; margin-bottom: var(--space-2);
  font-size: var(--text-sm); font-weight: 600; color: var(--color-text);
}
.required { color: var(--color-primary); }
.form-control {
  width: 100%; padding: var(--space-3) var(--space-4);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-sm); color: var(--color-text);
  font-family: var(--font-body);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-control:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px oklch(from var(--color-primary) l c h / .12);
}
.form-control::placeholder { color: var(--color-text-faint); }
textarea.form-control { resize: vertical; min-height: 80px; line-height: 1.6; }
.form-actions { display: flex; gap: var(--space-3); justify-content: flex-end; padding-top: var(--space-2); }

/* FILE DROP ZONE */
.file-drop-zone {
  display: flex; flex-direction: column; align-items: center;
  justify-content: center; gap: var(--space-2);
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8) var(--space-6);
  cursor: pointer; text-align: center;
  transition: border-color var(--transition), background var(--transition);
  position: relative;
}
.file-drop-zone:hover, .file-drop-zone.dragover {
  border-color: var(--color-primary);
  background: var(--color-primary-highlight);
}
.file-drop-zone input[type="file"] {
  position: absolute; inset: 0; opacity: 0; cursor: pointer; width: 100%; height: 100%;
}
.file-drop-icon { color: var(--color-primary); opacity: .6; }
.file-drop-icon svg { width: 36px; height: 36px; }
.file-drop-text { font-size: var(--text-sm); font-weight: 600; color: var(--color-text); }
.file-drop-hint { font-size: var(--text-xs); color: var(--color-text-faint); }
.file-drop-zone.has-file { border-color: var(--color-success); background: oklch(from var(--color-success) l c h / .05); }
.file-drop-zone.has-file .file-drop-text { color: var(--color-success); }

/* PROGRESS BAR */
.upload-progress-wrap {
  display: flex; align-items: center; gap: var(--space-3);
  margin-top: var(--space-4);
}
.upload-progress-wrap.hidden { display: none; }
.upload-progress-bar {
  flex: 1; height: 6px;
  background: var(--color-surface-offset);
  border-radius: var(--radius-full); overflow: hidden;
}
.upload-progress-fill {
  height: 100%; width: 0%;
  background: var(--color-primary);
  border-radius: var(--radius-full);
  transition: width .3s ease;
}
.upload-progress-text { font-size: var(--text-xs); color: var(--color-text-muted); white-space: nowrap; }

/* MODAL */
.modal-overlay {
  position: fixed; inset: 0; z-index: 500;
  background: oklch(0 0 0 / .5);
  backdrop-filter: blur(4px);
  display: flex; align-items: center; justify-content: center;
  padding: var(--space-4);
  animation: fadeIn .2s ease;
}
.modal-overlay.hidden { display: none; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
.modal {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-lg);
  width: 100%; max-width: 520px;
  max-height: 90dvh;
  overflow-y: auto;
  animation: slideUp .3s cubic-bezier(.16,1,.3,1);
}
@keyframes slideUp {
  from { opacity: 0; transform: translateY(16px) scale(.97); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}
.modal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--color-border);
}
.modal-title { font-size: var(--text-base); font-weight: 700; color: var(--color-text); }
.modal-body { padding: var(--space-6); }
.modal-footer {
  display: flex; gap: var(--space-3); justify-content: flex-end;
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--color-border);
}

/* RESPONSIVE */
@media (max-width: 768px) {
  .header { padding: var(--space-3) var(--space-4); }
  .header-subtitle { display: none; }
  .container { padding-inline: var(--space-4); }
  .main-content { padding-block: var(--space-6); }
  .form-row { grid-template-columns: 1fr; }
  .toast-container { bottom: var(--space-4); right: var(--space-4); left: var(--space-4); }
  .toast { max-width: 100%; }
}
@media (max-width: 480px) {
  .catalog-grid { grid-template-columns: repeat(2, 1fr); gap: var(--space-3); }
  .catalog-card-icon svg { width: 48px; height: 48px; }
}