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

:root {
  --blue:      #1a56db;
  --blue-dk:   #1040b0;
  --blue-lt:   #e8effc;
  --gray-bg:   #f0f2f7;
  --gray-bd:   #d1d5de;
  --gray-txt:  #6b7280;
  --red:       #dc2626;
  --green:     #16a34a;
  --white:     #ffffff;
  --text:      #1e2330;
  --radius:    8px;
  --shadow:    0 1px 4px rgba(0,0,0,.10), 0 4px 16px rgba(0,0,0,.06);
  --sidebar-w: 206px;
}

body {
  font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--gray-bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
}

/* ── Top bar ─────────────────────────────────────────────── */
.topbar {
  background: var(--blue);
  color: #fff;
  padding: 16px 32px;
  display: flex;
  align-items: center;
  gap: 14px;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,.2);
}
.topbar-icon { font-size: 26px; }
.topbar h1 { font-size: 18px; font-weight: 700; letter-spacing: .3px; }
.topbar small { font-size: 12px; opacity: .75; margin-left: 4px; }

/* ── Navbar ──────────────────────────────────────────────── */
.navbar {
  display: flex;
  background: var(--white);
  border-bottom: 2px solid var(--gray-bd);
  position: sticky;
  top: 0;
  z-index: 99;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.nav-tab {
  display: inline-block;
  padding: 10px 20px;
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
  color: var(--gray-txt);
  text-align: center;
  white-space: nowrap;
  border-bottom: 3px solid transparent;
  transition: background .12s, color .12s, border-color .12s;
  flex-shrink: 0;
}
.nav-tab:hover {
  background: var(--blue-lt);
  color: var(--blue);
}
.nav-tab.active {
  color: var(--blue);
  border-bottom-color: var(--blue);
  background: var(--blue-lt);
}
.nav-tab .zh {
  display: block;
  font-size: 11px;
  font-weight: 400;
  opacity: 0.75;
}

/* ── Layout ─────────────────────────────────────────────── */
.page { max-width: 960px; margin: 28px auto 60px; padding: 0 16px; }

/* ── Cards ───────────────────────────────────────────────── */
.card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin-bottom: 20px;
  overflow: hidden;
}
.card-header {
  background: var(--blue);
  color: #fff;
  padding: 10px 20px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 13px;
  letter-spacing: .4px;
}
.card-header .icon { font-size: 16px; }
.card-body { padding: 20px; }

/* ── Field grid ─────────────────────────────────────────── */
.fields {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px 24px;
}
.fields.cols-3 { grid-template-columns: 1fr 1fr 1fr; }
.fields.cols-1 { grid-template-columns: 1fr; }
.field-full { grid-column: 1 / -1; }

.field { display: flex; flex-direction: column; gap: 4px; }
.field label {
  font-size: 12px;
  font-weight: 600;
  color: var(--gray-txt);
  text-transform: uppercase;
  letter-spacing: .5px;
}
.field label .zh { font-weight: 400; text-transform: none; letter-spacing: 0; }
.field label .req { color: var(--red); margin-left: 2px; }

.field input,
.field select,
.field textarea {
  border: 1.5px solid var(--gray-bd);
  border-radius: 6px;
  padding: 8px 10px;
  font-size: 14px;
  font-family: inherit;
  color: var(--text);
  background: #fff;
  transition: border-color .15s;
  width: 100%;
}
.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(26,86,219,.12);
}
.field input.error,
.field select.error { border-color: var(--red); background: #fff5f5; }

.field .hint {
  font-size: 11px;
  color: var(--gray-txt);
}

/* ── Readonly fields ─────────────────────────────────────── */
.field input[readonly] {
  background: #f4f6fa;
  color: var(--gray-txt);
  cursor: default;
  border-style: dashed;
}

/* ── Logo selector ───────────────────────────────────────── */
.logo-selector-wrap {
  display: grid;
  grid-template-columns: 1fr 180px;
  gap: 14px;
  align-items: start;
}

.logo-presets {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-content: flex-start;
}

.logo-option {
  position: relative;
  border: 2px solid var(--gray-bd);
  border-radius: 8px;
  padding: 10px 12px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  transition: border-color .15s, background .15s, box-shadow .15s;
  background: #fafbff;
  min-width: 96px;
  user-select: none;
}
.logo-del-btn {
  position: absolute; top: 2px; right: 4px;
  background: none; border: none;
  font-size: 18px; line-height: 1; cursor: pointer;
  color: #999; padding: 0 2px;
}
.logo-del-btn:hover { color: #e00; }
.logo-option:hover {
  border-color: var(--blue);
  background: var(--blue-lt);
}
.logo-option.selected {
  border-color: var(--blue);
  background: var(--blue-lt);
  box-shadow: 0 0 0 3px rgba(26,86,219,.18);
}
.logo-option img {
  max-width: 80px;
  max-height: 52px;
  object-fit: contain;
}
.logo-option span {
  font-size: 11px;
  font-weight: 700;
  color: var(--blue);
  text-align: center;
  letter-spacing: .4px;
}

.logo-upload-area { display: flex; flex-direction: column; }

.logo-upload-inner {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.mini-upload-box {
  border: 2px dashed var(--gray-bd);
  border-radius: 6px;
  padding: 10px 8px;
  text-align: center;
  cursor: pointer;
  background: #fafbff;
  position: relative;
  transition: border-color .15s, background .15s;
}
.mini-upload-box:hover { border-color: var(--blue); background: var(--blue-lt); }
.mini-upload-box input[type=file] {
  position: absolute; inset: 0; opacity: 0; cursor: pointer;
  width: 100%; height: 100%; border: none;
}
.mini-upload-box .up-label {
  font-size: 11px; color: var(--gray-txt); pointer-events: none; line-height: 1.4;
}
.mini-upload-box .up-label strong { color: var(--blue); }
.logo-fname-hint {
  font-size: 10px; color: var(--blue); margin-top: 2px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

.logo-name-input {
  border: 1.5px solid var(--gray-bd);
  border-radius: 6px;
  padding: 7px 8px;
  font-size: 13px;
  font-family: inherit;
  color: var(--text);
  width: 100%;
}
.logo-name-input:focus {
  outline: none;
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(26,86,219,.12);
}

.btn-upload-logo {
  background: var(--blue);
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 8px;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  width: 100%;
  transition: background .12s;
}
.btn-upload-logo:hover { background: var(--blue-dk); }

/* ── Customer library ────────────────────────────────────── */
.customer-library {
  border: 1.5px solid var(--gray-bd);
  border-radius: var(--radius);
  overflow: hidden;
  background: #fafbff;
}

.library-header {
  background: var(--blue-lt);
  border-bottom: 1.5px solid var(--gray-bd);
  padding: 8px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  font-weight: 700;
  color: var(--blue);
  letter-spacing: .3px;
}
.library-count {
  font-weight: 400;
  color: var(--gray-txt);
  font-size: 11px;
}

.project-filter {
  border: 1px solid var(--gray-bd);
  border-radius: 4px;
  padding: 4px 8px;
  font-size: 11px;
  font-family: inherit;
  color: var(--text);
  background: #fff;
  cursor: pointer;
  max-width: 160px;
}
.project-filter:focus {
  outline: none;
  border-color: var(--blue);
}

.prod-project {
  display: inline-block;
  background: var(--blue-lt);
  color: var(--blue);
  font-size: 10px;
  font-weight: 600;
  padding: 1px 6px;
  border-radius: 3px;
  margin-left: 6px;
  vertical-align: middle;
}

.customer-cards {
  padding: 10px 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  min-height: 52px;
  align-items: flex-start;
}

.no-customers-msg {
  font-size: 12px;
  color: var(--gray-txt);
  padding: 8px 2px;
  width: 100%;
}

.customer-card {
  display: flex;
  align-items: center;
  gap: 6px;
  border: 1.5px solid var(--gray-bd);
  border-radius: 6px;
  background: #fff;
  overflow: hidden;
  transition: border-color .12s, box-shadow .12s;
  max-width: 260px;
}
.customer-card:hover { border-color: var(--blue); box-shadow: 0 0 0 2px rgba(26,86,219,.12); }

.cust-main {
  padding: 7px 10px;
  cursor: pointer;
  flex: 1;
  min-width: 0;
}
.cust-name {
  font-size: 13px;
  font-weight: 700;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.cust-meta {
  font-size: 11px;
  color: var(--gray-txt);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-top: 1px;
}

.btn-del-customer {
  background: none;
  border: none;
  border-left: 1.5px solid #f3f4f6;
  color: #9ca3af;
  padding: 0 10px;
  height: 100%;
  cursor: pointer;
  font-size: 11px;
  align-self: stretch;
  display: flex;
  align-items: center;
  transition: background .12s, color .12s;
  flex-shrink: 0;
}
.btn-del-customer:hover { background: #fef2f2; color: var(--red); }

.btn-save-customer {
  background: var(--blue-lt);
  border: 1.5px dashed var(--blue);
  color: var(--blue);
  border-radius: 6px;
  padding: 9px 18px;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  letter-spacing: .2px;
  transition: background .12s;
}
.btn-save-customer:hover { background: #d5e3fc; }

/* ── Prefix + input combo (Contact Person) ───────────────── */
.prefix-input-wrap {
  display: flex;
  gap: 6px;
}
.prefix-input-wrap .prefix-select {
  border: 1.5px solid var(--gray-bd);
  border-radius: 6px;
  padding: 8px 4px;
  font-size: 11px;
  font-family: inherit;
  color: var(--text);
  background: #fff;
  flex-shrink: 0;
  width: 33%;
  max-width: 80px;
  transition: border-color .15s;
}
.prefix-input-wrap .prefix-select:focus {
  outline: none;
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(26,86,219,.12);
}

/* ── Translation wrap (Payment Terms) ───────────────────── */
.translate-wrap {
  display: flex;
  gap: 6px;
  align-items: stretch;
}
.translate-wrap input { flex: 1; }

.btn-translate {
  white-space: nowrap;
  background: var(--blue);
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 0 14px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
  transition: background .12s;
}
.btn-translate:hover    { background: var(--blue-dk); }
.btn-translate:disabled { background: #94a3b8; cursor: not-allowed; }

/* ── Price + Tax wrap ────────────────────────────────────── */
.price-tax-wrap {
  display: flex;
  gap: 5px;
  align-items: stretch;
}
.price-tax-wrap input { flex: 1; min-width: 0; }
.price-tax-wrap .tax-select {
  flex-shrink: 0;
  width: 46%;
  font-size: 11px;
  padding: 8px 4px;
  border: 1.5px solid var(--gray-bd);
  border-radius: 6px;
  background: #fff;
  color: var(--text);
  font-family: inherit;
  transition: border-color .15s;
}
.price-tax-wrap .tax-select:focus {
  outline: none;
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(26,86,219,.12);
}

/* ── Item card header actions ────────────────────────────── */
.item-header-actions {
  display: flex;
  gap: 6px;
  align-items: center;
}
.btn-save-product {
  background: none;
  border: 1.5px solid var(--blue);
  color: var(--blue);
  border-radius: 5px;
  padding: 3px 10px;
  font-size: 11px;
  cursor: pointer;
  font-weight: 600;
  transition: background .12s;
  white-space: nowrap;
}
.btn-save-product:hover { background: var(--blue-lt); }

/* ── Product library ─────────────────────────────────────── */
.product-library {
  border: 1.5px solid var(--gray-bd);
  border-radius: var(--radius);
  overflow: hidden;
  background: #fafbff;
}
.no-products-msg {
  font-size: 12px;
  color: var(--gray-txt);
  padding: 8px 2px;
  width: 100%;
}
.product-card {
  display: flex;
  align-items: center;
  gap: 6px;
  border: 1.5px solid var(--gray-bd);
  border-radius: 6px;
  background: #fff;
  overflow: hidden;
  transition: border-color .12s, box-shadow .12s;
  max-width: 280px;
}
.product-card:hover { border-color: var(--blue); box-shadow: 0 0 0 2px rgba(26,86,219,.12); }
.prod-main {
  padding: 7px 10px;
  cursor: pointer;
  flex: 1;
  min-width: 0;
}
.prod-name {
  font-size: 13px;
  font-weight: 700;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.prod-meta {
  font-size: 11px;
  color: var(--gray-txt);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-top: 1px;
}
.btn-del-product {
  background: none;
  border: none;
  border-left: 1.5px solid #f3f4f6;
  color: #9ca3af;
  padding: 0 10px;
  cursor: pointer;
  font-size: 11px;
  align-self: stretch;
  display: flex;
  align-items: center;
  transition: background .12s, color .12s;
  flex-shrink: 0;
}
.btn-del-product:hover { background: #fef2f2; color: var(--red); }

/* ── File upload ────────────────────────────────────���────── */
.upload-box {
  border: 2px dashed var(--gray-bd);
  border-radius: 6px;
  padding: 14px;
  text-align: center;
  cursor: pointer;
  transition: border-color .15s, background .15s;
  background: #fafbff;
  position: relative;
}
.upload-box:hover { border-color: var(--blue); background: var(--blue-lt); }
.upload-box input[type=file] {
  position: absolute; inset: 0; opacity: 0; cursor: pointer;
  width: 100%; height: 100%; border: none;
}
.upload-box .up-label { font-size: 12px; color: var(--gray-txt); pointer-events: none; }
.upload-box .up-label strong { color: var(--blue); }
.preview-img {
  max-width: 100%; max-height: 90px;
  border-radius: 4px; margin-top: 6px;
  display: none;
  object-fit: contain;
}

/* ── Item list ───────────────────────────────────────────── */
#items-container { display: flex; flex-direction: column; gap: 16px; }

.item-card {
  border: 1.5px solid var(--gray-bd);
  border-radius: var(--radius);
  overflow: hidden;
}
.item-card-header {
  background: var(--blue-lt);
  border-bottom: 1.5px solid var(--gray-bd);
  padding: 9px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.item-card-header .item-num {
  font-weight: 700;
  color: var(--blue);
  font-size: 13px;
}
.btn-remove {
  background: none;
  border: 1.5px solid #f87171;
  color: var(--red);
  border-radius: 5px;
  padding: 3px 10px;
  font-size: 12px;
  cursor: pointer;
  font-weight: 600;
  transition: background .12s;
}
.btn-remove:hover { background: #fef2f2; }

.item-card-body {
  padding: 16px;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 12px 20px;
}
.item-amount-display {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  font-size: 13px;
  color: var(--gray-txt);
  padding-top: 4px;
  border-top: 1px solid #eee;
  margin-top: 4px;
}
.item-amount-display .amt-val {
  font-size: 16px;
  font-weight: 700;
  color: var(--blue);
}

/* item picture preview small */
.item-pic-preview {
  max-width: 100%;
  max-height: 70px;
  display: none;
  margin-top: 4px;
  border-radius: 4px;
  object-fit: contain;
}

/* ── Add item button ─────────────────────────────────────── */
.btn-add {
  width: 100%;
  background: var(--blue-lt);
  border: 2px dashed var(--blue);
  color: var(--blue);
  padding: 12px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  letter-spacing: .3px;
  transition: background .12s;
  margin-top: 4px;
}
.btn-add:hover { background: #d5e3fc; }

/* ── Summary ─────────────────────────────────────────────── */
.summary-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px 24px;
}
.summary-total {
  grid-column: 1 / -1;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--blue);
  color: #fff;
  border-radius: 6px;
  padding: 12px 20px;
  margin-top: 6px;
}
.summary-total .lbl { font-size: 14px; font-weight: 600; }
.summary-total .val { font-size: 20px; font-weight: 800; }

.subtotal-row {
  grid-column: 1 / -1;
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  color: var(--gray-txt);
  padding: 8px 4px 0;
  border-top: 1px solid #eee;
}

/* ── Generate button ─────────────────────────────────────── */
.generate-wrap {
  text-align: center;
  padding: 8px 0 20px;
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}
.btn-generate {
  background: var(--blue);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  padding: 15px 60px;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  letter-spacing: .5px;
  box-shadow: 0 4px 14px rgba(26,86,219,.35);
  transition: background .15s, transform .1s;
}
.btn-generate:hover  { background: var(--blue-dk); }
.btn-generate:active { transform: scale(.98); }
.btn-generate:disabled { background: #94a3b8; cursor: not-allowed; box-shadow: none; }

.btn-pdf {
  background: #fff;
  color: var(--blue);
  border: 2px solid var(--blue);
  border-radius: var(--radius);
  padding: 15px 40px;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  letter-spacing: .5px;
  transition: background .15s, transform .1s;
}
.btn-pdf:hover  { background: var(--blue-lt); }
.btn-pdf:active { transform: scale(.98); }
.btn-pdf:disabled { border-color: #94a3b8; color: #94a3b8; cursor: not-allowed; }

.btn-generate .spinner {
  display: none;
  width: 16px; height: 16px;
  border: 2px solid rgba(255,255,255,.4);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin .7s linear infinite;
  vertical-align: middle;
  margin-right: 6px;
}
.btn-generate.loading .spinner { display: inline-block; }
.btn-generate.loading .btn-text { opacity: .8; }

@keyframes spin { to { transform: rotate(360deg); } }

/* ── Toast / messages ────────────────────────────────────── */
.toast {
  position: fixed;
  top: 72px; right: 20px;
  background: var(--red);
  color: #fff;
  padding: 12px 20px;
  border-radius: var(--radius);
  font-size: 13px;
  font-weight: 600;
  box-shadow: var(--shadow);
  z-index: 200;
  max-width: 320px;
  animation: slide-in .2s ease;
}
.toast.success { background: var(--green); }
@keyframes slide-in {
  from { opacity: 0; transform: translateX(30px); }
  to   { opacity: 1; transform: translateX(0); }
}

/* ── Placeholder page ─────────────────────────────────────── */
.placeholder-page {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 50vh;
}
.placeholder-card {
  text-align: center;
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 48px 40px;
  max-width: 480px;
}
.placeholder-icon { font-size: 48px; margin-bottom: 16px; }
.placeholder-card h2 {
  font-size: 20px; color: var(--blue); margin-bottom: 8px;
}
.placeholder-card p {
  font-size: 14px; color: var(--gray-txt); margin-top: 4px;
}
.placeholder-hint {
  font-size: 12px !important;
  color: #a0a7b4 !important;
  margin-top: 12px !important;
  line-height: 1.6;
}

/* ── Item project selector ───────────────────────────────── */
.item-project-select {
  border: 1.5px solid var(--gray-bd);
  border-radius: 5px;
  padding: 3px 8px;
  font-size: 11px;
  font-family: inherit;
  color: var(--text);
  background: #fff;
  cursor: pointer;
  max-width: 150px;
  transition: border-color .15s;
}
.item-project-select:focus {
  outline: none;
  border-color: var(--blue);
}

/* ── Bank info ───────────────────────────────────────────── */
.bank-preview-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px 20px;
}
.bank-pv-row {
  display: flex;
  gap: 6px;
  font-size: 13px;
  padding: 4px 0;
}
.bank-pv-lbl {
  font-weight: 600;
  color: var(--gray-txt);
  min-width: 100px;
  flex-shrink: 0;
}
.bank-pv-val {
  color: var(--text);
}

.bank-edit-form {
  margin-top: 14px;
  padding: 16px;
  background: #fafbff;
  border: 1.5px dashed var(--blue);
  border-radius: var(--radius);
}

.btn-edit-bank,
.btn-del-bank {
  background: var(--blue-lt);
  border: 1.5px solid var(--blue);
  color: var(--blue);
  border-radius: 5px;
  padding: 5px 14px;
  font-size: 12px;
  cursor: pointer;
  font-weight: 600;
  transition: background .12s;
}
.btn-edit-bank:hover,
.btn-del-bank:hover { background: #d5e3fc; }
.btn-del-bank { border-color: var(--red); color: var(--red); background: #fff; }
.btn-del-bank:hover { background: #fef2f2; }

.btn-save-bank,
.btn-cancel-bank {
  border: none;
  border-radius: 5px;
  padding: 6px 16px;
  font-size: 12px;
  cursor: pointer;
  font-weight: 600;
  transition: background .12s;
}
.btn-save-bank {
  background: var(--blue);
  color: #fff;
}
.btn-save-bank:hover { background: var(--blue-dk); }
.btn-cancel-bank {
  background: #e5e7eb;
  color: var(--gray-txt);
}
.btn-cancel-bank:hover { background: #d1d5db; }

/* ── LED fields ───────────────────────────────────────────── */
.item-led-fields {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 12px 20px;
  grid-column: 1 / -1;
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 640px) {
  .fields { grid-template-columns: 1fr; }
  .fields.cols-3 { grid-template-columns: 1fr; }
  .item-card-body { grid-template-columns: 1fr 1fr; }
  .summary-grid { grid-template-columns: 1fr; }
  .item-led-fields { grid-template-columns: 1fr 1fr; }
  .bank-preview-grid { grid-template-columns: 1fr; }
  .nav-tab {
    padding: 8px 12px;
    font-size: 11px;
  }
  .nav-tab .zh {
    font-size: 10px;
  }
}