@import url('https://fonts.googleapis.com/css2?family=DM+Serif+Display:ital@0;1&family=Inter:wght@300;400;500;600;700&display=swap');

/* ── VARIABLES ─────────────────────────────────────── */
:root {
  --c-white:   #ffffff;
  --c-black:   #0a0a0a;
  --c-grey-50: #f9f9f9;
  --c-grey-100:#f2f2f2;
  --c-grey-200:#e4e4e4;
  --c-grey-400:#9e9e9e;
  --c-grey-700:#4a4a4a;
  --c-red:     #c0392b;
  --c-red-dark:#962d22;
  --c-green:   #1a7a4a;

  --font-serif: 'DM Serif Display', Georgia, serif;
  --font-sans:  'Inter', -apple-system, sans-serif;

  --header-h:  56px;
  --sidebar-w: 220px;
  --border:    1px solid var(--c-grey-200);
}

[data-theme="dark"] {
  --c-white:   #0f0f0f;
  --c-black:   #f0f0f0;
  --c-grey-50: #171717;
  --c-grey-100:#1e1e1e;
  --c-grey-200:#2a2a2a;
  --c-grey-400:#666666;
  --c-grey-700:#aaaaaa;
  --c-red:     #e05244;
  --border:    1px solid var(--c-grey-200);
}

/* ── RESET ─────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.5;
  color: var(--c-black);
  background: var(--c-white);
  min-height: 100vh;
  transition: background .2s, color .2s;
}

/* ── TYPOGRAPHY ────────────────────────────────────── */
h1,h2,h3,h4,h5 { font-family: var(--font-serif); font-weight: 400; line-height: 1.2; }
h1 { font-size: 2.4rem; }
h2 { font-size: 1.7rem; }
h3 { font-size: 1.2rem; }

a { color: inherit; text-decoration: none; }
code { font-family: monospace; font-size: 0.85em; }

/* ── HEADER ────────────────────────────────────────── */
.site-header {
  height: var(--header-h);
  border-bottom: 2px solid var(--c-black);
  display: flex;
  align-items: center;
  padding: 0 2rem;
  gap: 2rem;
  position: sticky;
  top: 0;
  background: var(--c-white);
  z-index: 100;
}

.site-logo {
  display: flex;
  align-items: center;
  white-space: nowrap;
}

.site-logo img {
  height: 40px;
  width: auto;
  display: block;
}

[data-theme="dark"] .site-logo img {
  filter: invert(1);
}



.header-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex: 1;
}

.header-nav a {
  font-size: 13px;
  font-weight: 500;
  color: var(--c-grey-700);
  transition: color .15s;
}
.header-nav a:hover { color: var(--c-red); }

.header-right {
  display: flex;
  align-items: center;
  gap: .75rem;
  margin-left: auto;
}

.search-bar {
  display: flex;
  align-items: center;
  border: var(--border);
  border-color: var(--c-grey-400);
  overflow: hidden;
}
.search-bar input {
  border: none;
  background: transparent;
  padding: .45rem .75rem;
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--c-black);
  width: 220px;
  outline: none;
}
.search-bar button {
  background: var(--c-black);
  color: var(--c-white);
  border: none;
  padding: .45rem .75rem;
  cursor: pointer;
  font-size: 13px;
  transition: background .15s;
}
.search-bar button:hover { background: var(--c-red); }

/* ── LAYOUT ────────────────────────────────────────── */
.page-wrapper {
  display: flex;
  min-height: calc(100vh - var(--header-h));
}

/* Sidebar for storefront */
.store-sidebar {
  width: 220px;
  min-width: 220px;
  border-right: var(--border);
  padding: 2rem 0;
  background: var(--c-white);
}

.sidebar-section {
  padding: 0 1.25rem;
  margin-bottom: 2rem;
}
.sidebar-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--c-grey-400);
  margin-bottom: .75rem;
}

.sidebar-cats { list-style: none; }
.sidebar-cats li a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: .4rem 0;
  font-size: 13px;
  color: var(--c-grey-700);
  transition: color .15s;
  border-bottom: 1px dashed var(--c-grey-200);
}
.sidebar-cats li a:hover, .sidebar-cats li a.active {
  color: var(--c-red);
}
.sidebar-cats li a .cat-count {
  font-size: 11px;
  color: var(--c-grey-400);
}

.sort-select {
  width: 100%;
  border: var(--border);
  background: transparent;
  color: var(--c-black);
  font-family: var(--font-sans);
  font-size: 13px;
  padding: .4rem .5rem;
  cursor: pointer;
  outline: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23666' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right .5rem center;
}

/* Main content */
.store-main {
  flex: 1;
  padding: 2rem;
  min-width: 0;
}

.store-main-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 1.5rem;
  border-bottom: var(--border);
  padding-bottom: 1rem;
}
.store-main-header h2 { font-size: 1.1rem; font-family: var(--font-sans); font-weight: 600; }
.store-count { font-size: 12px; color: var(--c-grey-400); }

/* ── BOOK GRID ─────────────────────────────────────── */
.book-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem 1.25rem;
}

@media (max-width: 1200px) { .book-grid { grid-template-columns: repeat(3,1fr); } }
@media (max-width: 900px)  { .book-grid { grid-template-columns: repeat(2,1fr); } }
@media (max-width: 600px)  { .book-grid { grid-template-columns: 1fr; } }

.book-card {
  border: var(--border);
  background: var(--c-white);
  cursor: pointer;
  transition: border-color .15s;
  display: flex;
  flex-direction: column;
}
.book-card:hover { border-color: var(--c-red); }

.book-cover {
  width: 100%;
  aspect-ratio: 3/4;
  object-fit: cover;
  display: block;
  background: var(--c-grey-100);
  border-bottom: var(--border);
}

.book-cover-placeholder {
  width: 100%;
  aspect-ratio: 3/4;
  background: var(--c-grey-100);
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: var(--border);
  font-family: var(--font-serif);
  font-size: 1.8rem;
  color: var(--c-grey-400);
}

.book-info {
  padding: .65rem .75rem;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: .2rem;
}
.book-category {
  font-size: 9px;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--c-red);
}
.book-title {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  line-height: 1.3;
  color: var(--c-black);
}
.book-author {
  font-size: 11px;
  color: var(--c-grey-400);
}
.book-footer {
  padding: .6rem .75rem;
  border-top: var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: auto;
}
.book-price {
  font-size: 12px;
  font-weight: 700;
  color: var(--c-black);
}
.book-price small {
  font-size: 9px;
  font-weight: 400;
  color: var(--c-grey-400);
  display: block;
  line-height: 1;
}

/* ── BUTTONS ───────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .55rem 1.1rem;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
  border: 2px solid transparent;
  cursor: pointer;
  transition: background .15s, color .15s, border-color .15s;
  white-space: nowrap;
  text-decoration: none;
}

.btn-primary {
  background: var(--c-black);
  color: var(--c-white);
  border-color: var(--c-black);
}
.btn-primary:hover {
  background: var(--c-red);
  border-color: var(--c-red);
}

.btn-outline {
  background: transparent;
  color: var(--c-black);
  border-color: var(--c-black);
}
.btn-outline:hover {
  background: var(--c-black);
  color: var(--c-white);
}

.btn-red {
  background: var(--c-red);
  color: var(--c-white);
  border-color: var(--c-red);
}
.btn-red:hover { background: var(--c-red-dark); border-color: var(--c-red-dark); }

.btn-ghost {
  background: transparent;
  color: var(--c-grey-700);
  border-color: transparent;
}
.btn-ghost:hover { background: var(--c-grey-100); color: var(--c-black); }

.btn-sm { padding: .3rem .7rem; font-size: 12px; }
.btn-danger { background: #c0392b; color: #fff; border-color: #c0392b; }
.btn-danger:hover { background: #962d22; border-color: #962d22; }
.btn-success { background: var(--c-green); color: #fff; border-color: var(--c-green); }

/* ── FORMS ─────────────────────────────────────────── */
.form-group { margin-bottom: 1.1rem; }
.form-label {
  display: block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--c-grey-700);
  margin-bottom: .4rem;
}
.form-input,
.form-textarea,
.form-select {
  width: 100%;
  border: var(--border);
  background: var(--c-white);
  color: var(--c-black);
  font-family: var(--font-sans);
  font-size: 13px;
  padding: .55rem .75rem;
  outline: none;
  transition: border-color .15s;
  resize: vertical;
  appearance: none;
}
.form-input:focus,
.form-textarea:focus,
.form-select:focus { border-color: var(--c-black); }

.form-hint {
  font-size: 11px;
  color: var(--c-grey-400);
  margin-top: .3rem;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

/* ── TABLES ────────────────────────────────────────── */
.table-wrap { overflow-x: auto; }
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
th, td {
  border: var(--border);
  padding: .65rem .85rem;
  text-align: left;
  vertical-align: middle;
}
th {
  background: var(--c-grey-50);
  font-weight: 700;
  font-size: 11px;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--c-grey-700);
  white-space: nowrap;
}
tr:hover td { background: var(--c-grey-50); }

/* ── BADGES ────────────────────────────────────────── */
.badge {
  display: inline-block;
  padding: .2rem .55rem;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .04em;
  text-transform: uppercase;
}
.badge-active  { background: #e8f5ee; color: #1a7a4a; }
.badge-inactive{ background: #fdecea; color: #c0392b; }
.badge-pending { background: #fef9e7; color: #b7770d; }
.badge-success { background: #e8f5ee; color: #1a7a4a; }
.badge-admin   { background: #0a0a0a; color: #ffffff; }
.badge-user    { background: var(--c-grey-200); color: var(--c-grey-700); }

/* ── MODAL ─────────────────────────────────────────── */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,.6);
  display: none;
  align-items: flex-start;
  justify-content: center;
  z-index: 1000;
  overflow-y: auto;
  padding: 2rem 1rem;
}
.modal-overlay.open { display: flex; }
.modal-box {
  background: var(--c-white);
  border: 2px solid var(--c-black);
  width: 100%;
  max-width: 680px;
  margin: auto;
  flex-shrink: 0;
}
.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
  border-bottom: 2px solid var(--c-black);
}
.modal-header h3 { font-size: 1rem; font-family: var(--font-sans); font-weight: 700; }
.modal-close {
  background: none; border: none;
  font-size: 1.2rem; cursor: pointer; color: var(--c-black);
  line-height: 1;
}
.modal-body { padding: 1.5rem; }
.modal-footer {
  border-top: var(--border);
  padding: 1rem 1.5rem;
  display: flex;
  justify-content: flex-end;
  gap: .75rem;
}

/* ── ADMIN LAYOUT ──────────────────────────────────── */
.admin-wrapper {
  display: flex;
  min-height: calc(100vh - var(--header-h));
}

.admin-sidebar {
  width: var(--sidebar-w);
  min-width: var(--sidebar-w);
  border-right: 2px solid var(--c-black);
  background: var(--c-white);
  padding-top: 1.5rem;
  position: sticky;
  top: var(--header-h);
  height: calc(100vh - var(--header-h));
  overflow-y: auto;
}
.admin-sidebar-logo {
  padding: 0 1.25rem 1.25rem;
  border-bottom: var(--border);
  margin-bottom: 1rem;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--c-grey-400);
}
.admin-nav { list-style: none; }
.admin-nav li a {
  display: flex;
  align-items: center;
  gap: .6rem;
  padding: .65rem 1.25rem;
  font-size: 13px;
  font-weight: 500;
  color: var(--c-grey-700);
  transition: all .15s;
  border-left: 3px solid transparent;
}
.admin-nav li a:hover,
.admin-nav li a.active {
  color: var(--c-black);
  background: var(--c-grey-50);
  border-left-color: var(--c-red);
}

.admin-content {
  flex: 1;
  padding: 2rem;
  min-width: 0;
}

.admin-page { display: none; }
.admin-page.active { display: block; }

/* ── PAGE HEADER ───────────────────────────────────── */
.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 2px solid var(--c-black);
}
.page-header h1 {
  font-size: 1.4rem;
  font-family: var(--font-sans);
  font-weight: 700;
}

/* ── STATS CARDS ───────────────────────────────────── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}
.stat-card {
  border: var(--border);
  padding: 1.25rem;
}
.stat-card-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--c-grey-400);
  margin-bottom: .4rem;
}
.stat-card-value {
  font-family: var(--font-serif);
  font-size: 2rem;
  line-height: 1;
  color: var(--c-black);
}
.stat-card-value.red   { color: var(--c-red); }
.stat-card-value.green { color: var(--c-green); }

/* ── ALERTS ────────────────────────────────────────── */
.alert {
  padding: .75rem 1rem;
  border-left: 4px solid;
  font-size: 13px;
  margin-bottom: 1rem;
}
.alert-error   { border-color: #c0392b; background: #fdecea; color: #c0392b; }
.alert-success { border-color: #1a7a4a; background: #e8f5ee; color: #1a7a4a; }
.alert-info    { border-color: #2471a3; background: #eaf3fb; color: #2471a3; }

/* ── BOOK DETAIL PAGE ──────────────────────────────── */
.book-detail-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 3rem;
  padding: 2rem;
}
@media (max-width: 720px) {
  .book-detail-layout { grid-template-columns: 1fr; gap: 1.5rem; }
}
.book-detail-cover {
  border: var(--border);
  width: 100%;
  aspect-ratio: 2/3;
  object-fit: cover;
  display: block;
}
.book-detail-cover-placeholder {
  border: var(--border);
  width: 100%;
  aspect-ratio: 2/3;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--c-grey-100);
  font-family: var(--font-serif);
  font-size: 3rem;
  color: var(--c-grey-400);
}

.book-meta-list { list-style: none; margin: 1rem 0; }
.book-meta-list li {
  display: flex;
  border-bottom: 1px dashed var(--c-grey-200);
  padding: .45rem 0;
  font-size: 13px;
}
.book-meta-list li .meta-key {
  width: 120px;
  min-width: 120px;
  color: var(--c-grey-400);
  font-weight: 500;
}
.book-tags { display: flex; flex-wrap: wrap; gap: .35rem; margin: 1rem 0; }
.book-tag {
  border: var(--border);
  padding: .2rem .55rem;
  font-size: 11px;
  color: var(--c-grey-700);
}

/* ── PAYMENT MODAL SPECIFICS ───────────────────────── */
.payment-amount {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  color: var(--c-black);
  text-align: center;
  margin: 1rem 0;
  letter-spacing: -.02em;
}
.payment-amount .unique { color: var(--c-red); border-bottom: 2px solid var(--c-red); }
.bank-info-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: .7rem 0;
  border-bottom: var(--border);
  font-size: 13px;
}
.bank-info-row:last-child { border-bottom: none; }
.bank-info-label { color: var(--c-grey-400); font-size: 11px; text-transform: uppercase; letter-spacing: .05em; }
.bank-info-value { font-weight: 700; }
.waiting-row {
  display: flex;
  align-items: center;
  gap: .75rem;
  font-size: 13px;
  color: var(--c-grey-400);
  margin-top: 1.5rem;
  justify-content: center;
}

/* ── SPINNER ───────────────────────────────────────── */
@keyframes spin { to { transform: rotate(360deg); } }
.spinner {
  width: 16px; height: 16px;
  border: 2px solid var(--c-grey-200);
  border-top-color: var(--c-black);
  animation: spin .8s linear infinite;
  display: inline-block;
  flex-shrink: 0;
}

/* ── THEME TOGGLE ──────────────────────────────────── */
.theme-btn {
  background: none;
  border: var(--border);
  width: 32px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  color: var(--c-black);
  font-size: .9rem;
  transition: background .15s;
}
.theme-btn:hover { background: var(--c-grey-100); }

/* ── BREADCRUMB ────────────────────────────────────── */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: .5rem;
  font-size: 12px;
  color: var(--c-grey-400);
  padding: 1rem 2rem;
  border-bottom: var(--border);
}
.breadcrumb a { color: var(--c-grey-400); }
.breadcrumb a:hover { color: var(--c-red); }
.breadcrumb-sep { color: var(--c-grey-200); }

/* ── COVER THUMB ───────────────────────────────────── */
.cover-thumb {
  width: 44px; height: 60px;
  object-fit: cover;
  border: var(--border);
  display: block;
}
.cover-thumb-placeholder {
  width: 44px; height: 60px;
  background: var(--c-grey-100);
  border: var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .75rem;
  color: var(--c-grey-400);
}

/* ── SUCCESS STATE ─────────────────────────────────── */
.success-state {
  text-align: center;
  padding: 2rem;
}
.success-icon {
  font-size: 3rem;
  color: var(--c-green);
  margin-bottom: 1rem;
}

/* ── FOOTER ────────────────────────────────────────── */
.site-footer {
  border-top: 2px solid var(--c-black);
  padding: 1.5rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: var(--c-grey-400);
}

/* ── LOGIN PAGE ────────────────────────────────────── */
.auth-wrapper {
  max-width: 420px;
  margin: 4rem auto;
  padding: 0 1rem;
}
.auth-card {
  border: 2px solid var(--c-black);
  padding: 2rem;
}
.auth-card h2 {
  font-size: 1.2rem;
  font-family: var(--font-sans);
  font-weight: 700;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: var(--border);
}
.auth-switch {
  text-align: center;
  margin-top: 1.25rem;
  font-size: 13px;
  color: var(--c-grey-400);
}
.auth-switch a { color: var(--c-red); font-weight: 600; }

/* ── UTILS ─────────────────────────────────────────── */
.mt-1 { margin-top: .5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-2 { margin-bottom: 1rem; }
.flex  { display: flex; }
.gap-1 { gap: .5rem; }
.gap-2 { gap: 1rem; }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }
.text-muted { color: var(--c-grey-400); }
.text-sm { font-size: 12px; }
.w-full { width: 100%; }