body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  
  /* Thủ thuật làm chữ nét và mượt hơn (đặc biệt trên màn hình Mac/iPhone) */
  -webkit-font-smoothing: antialiased; 
}
:root {
  --bg: #f3f4f6;
  --card: #ffffff;
  --primary: #2563eb;
  --primary-soft: #dbeafe;
  --danger: #ef4444;
  --text: #0f172a;
  --muted: #6b7280;
  --border: #e5e7eb;
  --sidebar: #0f172a;
}

* {
  box-sizing: border-box;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  height: 100vh;
  display: flex;
}

/* ===== LAYOUT ===== */

.layout {
  display: flex;
  width: 100%;
  height: 100vh;
  overflow: hidden;
}

.sidebar {
  width: 230px;
  background: var(--sidebar);
  color: #e5e7eb;
  display: flex;
  flex-direction: column;
  padding: 16px 14px;
}

.sidebar-logo {
  font-weight: 700;
  font-size: 18px;
  margin-bottom: 16px;
  color: #ffffff;
}

.sidebar-logo span {
  display: block;
  font-size: 12px;
  font-weight: 400;
  color: #9ca3af;
  margin-top: 4px;
}

.nav-group-title {
  font-size: 11px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: #6b7280;
  margin: 12px 6px 6px;
}

.nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
}

.nav-btn {
  border: none;
  border-radius: 999px;
  padding: 8px 12px;
  font-size: 13px;
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  background: transparent;
  color: #e5e7eb;
  text-align: left;
  transition: background 0.1s, transform 0.05s;
}

.nav-btn span.icon svg {
  width: 18px;
  height: 18px;
  display: block;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.7;
}


.nav-btn:hover {
  background: rgba(148, 163, 184, 0.16);
}

.nav-btn.active {
  background: #1d4ed8;
  color: #ffffff;
}

.sidebar-footer {
  font-size: 11px;
  color: #6b7280;
  margin-top: 8px;
}

.main {
  flex: 1;
  padding: 16px 18px;
  overflow-y: auto;
}

h1 {
  margin: 0 0 4px;
  font-size: 22px;
}

.subtitle {
  margin: 0 0 16px;
  color: var(--muted);
  font-size: 13px;
}

/* ===== CARD / COMMON UI ===== */

.card {
  background: var(--card);
  border-radius: 10px;
  padding: 14px 16px;
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.05);
  border: 1px solid var(--border);
  margin-bottom: 16px;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  gap: 8px;
}

.card-title {
  font-size: 16px;
  font-weight: 600;
}

.card-subtitle {
  font-size: 12px;
  color: var(--muted);
  margin-top: 2px;
}

.btn-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

button {
  border-radius: 999px;
  border: none;
  padding: 8px 14px;
  font-size: 13px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: transform 0.05s, box-shadow 0.12s, background 0.12s, color 0.12s;
  white-space: nowrap;
}

button:active {
  transform: translateY(1px);
  box-shadow: none;
}

.btn-primary {
  background: var(--primary);
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.4);
}

.btn-outline {
  background: #ffffff;
  color: var(--primary);
  border: 1px solid var(--primary-soft);
}

.btn-ghost {
  background: transparent;
  color: var(--muted);
  border: none;
  padding: 6px 10px;
}

.btn-small {
  padding: 6px 10px;
  font-size: 12px;
}

.badge {
  display: inline-flex;
  align-items: center;
  font-size: 11px;
  border-radius: 999px;
  padding: 2px 8px;
  background: var(--primary-soft);
  color: var(--primary);
  margin-left: 6px;
}
/* Badge trạng thái kho */
.badge-danger {
  background: #fee2e2;   /* nền đỏ nhạt */
  color: #b91c1c;        /* chữ đỏ đậm */
}

.badge-warning {
  background: #fef3c7;   /* nền vàng nhạt */
  color: #92400e;        /* chữ vàng nâu */
}

.muted {
  color: var(--muted);
  font-size: 12px;
}

.mt-8 {
  margin-top: 8px;
}

/* ===== FORM ===== */

.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 10px 14px;
  margin-bottom: 10px;
}

label {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 4px;
  display: inline-block;
}

input,
select,
textarea {
  width: 100%;
  padding: 7px 9px;
  border-radius: 8px;
  border: 1px solid var(--border);
  font-size: 13px;
  outline: none;
  background: #f9fafb;
  transition: border 0.1s, box-shadow 0.1s, background 0.1s;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 1px rgba(37, 99, 235, 0.15);
  background: #ffffff;
}

textarea {
  min-height: 60px;
  resize: vertical;
}

.form-footer {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 6px;
}

/* ===== TABLE ===== */

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

thead {
  background: #f9fafb;
  position: sticky;
  top: 0;
  z-index: 1;
}

th,
td {
  padding: 6px 8px;
  border-bottom: 1px solid var(--border);
  text-align: left;
}

th {
  font-weight: 600;
  color: var(--muted);
  font-size: 12px;
}

tbody tr:hover {
  background: #f3f4ff;
}

.table-wrap {
  /* height: calc(100vh - 260px); auto tính theo chiều cao màn hình */
  overflow: auto;
  max-height: 665px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #ffffff;
}
/* Khóa scroll khi mở overlay */
    body.no-scroll-overlay {
      overflow: hidden;
    }

    /* Khung ảnh nhỏ ở danh sách sản phẩm */
    .list-img-wrapper {
      display: inline-block;
      position: relative;
      border-radius: 10px;
      overflow: hidden;
      cursor: zoom-in;
      border: 1px solid rgba(148, 163, 184, 0.4);
      transition: transform 0.28s ease, box-shadow 0.28s ease, border-color 0.28s ease;
    }

    .list-img-wrapper::after {
      content: "Phóng to";
      position: absolute;
      bottom: 4px;
      right: 6px;
      padding: 2px 8px;
      border-radius: 999px;
      font-size: 10px;
      background: rgba(15, 23, 42, 0.75);
      color: #e5e7eb;
      opacity: 0;
      transform: translateY(4px);
      transition: opacity 0.22s ease, transform 0.22s ease;
      pointer-events: none;
      white-space: nowrap;
    }

    .list-img-wrapper:hover::after {
      opacity: 1;
      transform: translateY(0);
    }

    .list-img-wrapper .img-thumb {
      display: block;
      width: 64px;
      height: 64px;
      object-fit: cover;
      transition: transform 0.3s ease;
      transform-origin: center center;
    }

    .list-img-wrapper:hover {
      transform: translateY(-2px) scale(1.06);
      box-shadow: 0 12px 30px rgba(247, 249, 255, 0.65);
      border-color: rgba(235, 243, 246, 0.9);
    }

    .list-img-wrapper:hover .img-thumb {
      transform: scale(1.12);
    }

    /* Popup phóng to ảnh ở ngoài danh sách sản phẩm */
    .image-overlay {
      position: fixed;
      inset: 0;
      display: flex;
      align-items: center;
      justify-content: center;
      background: radial-gradient(circle at top, rgba(248, 250, 255, 0.398), rgba(250, 252, 255, 0.337));
      opacity: 0;
      pointer-events: none;
      transition: opacity 0.28s ease;
      z-index: 2000;
    }

    .image-overlay.open {
      opacity: 1;
      pointer-events: auto;
    }

    .image-overlay-inner {
      max-width: 90vw;
      max-height: 90vh;
      background: rgba(32, 34, 38, 0.415);
      border-radius: 18px;
      padding: 14px;
      border: 1px solid rgba(248, 251, 255, 0.6);
      box-shadow: 0 32px 80px rgba(0, 0, 0, 0.9);
      transform: scale(0.94) translateY(8px);
      opacity: 0;
      transition: transform 0.3s ease, opacity 0.3s ease;
    }

    .image-overlay.open .image-overlay-inner {
      transform: scale(1) translateY(0);
      opacity: 1;
    }

    .image-overlay-img-wrap {
      border-radius: 12px;
      overflow: hidden;
    }

    .image-overlay-img-wrap img {
      display: block;
      max-width: 100%;
      max-height: 80vh;
      height: auto;
    }

    .image-overlay-footer {
      margin-top: 10px;
      display: flex;
      justify-content: flex-end;
    }

    .image-overlay-close {
      cursor: pointer;
      padding: 4px 12px;
      border-radius: 999px;
      border: 1px solid rgba(148, 163, 184, 0.7);
      background: rgba(210, 34, 34, 0.866);
      color: #e5e7eb;
      font-size: 12px;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .image-overlay-close span {
      font-size: 11px;
      opacity: 0.8;
    }

    @media (max-width: 640px) {
      .image-overlay-inner {
        padding: 10px;
      }
    }

/* ===== BADGES, PILLS ===== */

.pill {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: #f3f4f6;
  border-radius: 999px;
  padding: 2px 8px;
  font-size: 11px;
  color: var(--muted);
}

.pill-dot {
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: var(--primary);
}

.pill-danger {
  background: #fef2f2;
  color: #b91c1c;
}

.pill-danger-dot {
  background: #ef4444;
}

.qty-badge {
  font-weight: 600;
  padding: 2px 10px;
  border-radius: 999px;
  background: #ecfdf3;
  color: #166534;
  font-size: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 70px;
  text-align: center;
}
.qty-ok {
  background: #41de69; /* xanh nhạt */
  color: #0000006d; /* xanh đậm */
}

.qty-warning {
  background: #fef3c7; /* vàng nhạt */
  color: #92400e;
}

.qty-danger {
  background: #fee2e2; /* đỏ nhạt */
  color: #b91c1c;
}

.qty-low {
  background: #fef2f2;
  color: #b91c1c;
}

/* ===== IMAGES ===== */

.img-cell {
  max-width: 80px;
}

/* Hiệu ứng zoom đẹp cho ảnh thumbnail */
.img-thumb {
  width: 55px;
  height: 55px;
  object-fit: cover;
  border-radius: 10px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  cursor: zoom-in;
  border: 1px solid rgba(148, 163, 184, 0.25);
}

.img-thumb:hover {
  transform: scale(1.15);
  box-shadow: 0 4px 16px rgba(0,0,0,0.25);
}

/* POPUP PHÓNG TO TOÀN MÀN HÌNH */
.image-popup-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.8);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9999;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

.image-popup-backdrop.open {
  opacity: 1;
  pointer-events: auto;
}

.image-popup-inner {
  max-width: 90vw;
  max-height: 90vh;
  background: #0f172a;
  padding: 14px;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,0.25);
  box-shadow: 0 0 40px rgba(0,0,0,0.4);
  transform: scale(0.9);
  opacity: 0;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.image-popup-backdrop.open .image-popup-inner {
  transform: scale(1);
  opacity: 1;
}

.image-popup-inner img {
  max-width: 100%;
  max-height: 80vh;
  border-radius: 12px;
}


/* ===== SCREENS ===== */

.screen {
  display: none;
}

.screen.active {
  display: block;
}

/* ===== MODAL ===== */

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.45);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 50;
}

.modal-dialog {
  background: #ffffff;
  border-radius: 12px;
  max-width: 760px;
  width: 100%;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 20px 60px rgba(15, 23, 42, 0.3);
  border: 1px solid rgba(148, 163, 184, 0.4);
}

.modal-header {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
}

.modal-title {
  font-size: 16px;
  font-weight: 600;
}

.modal-body {
  padding: 14px 16px 8px;
  overflow: auto;
}

.modal-footer {
  padding: 10px 16px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}

/* ===== VARIANT ROW (trong form tạo sản phẩm) ===== */

.variant-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 8px;
  padding: 8px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #f9fafb;
  margin-top: 8px;
}

.variant-row-actions {
  display: flex;
  gap: 6px;
  align-items: flex-end;
}

/* ===== IMAGE PICKER ===== */

.image-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
  margin-top: 8px;
}

.image-card {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px;
  background: #f9fafb;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  transition: border 0.1s, box-shadow 0.1s, background 0.1s, transform 0.05s;
}
.image-card {
  position: relative;
}

/* Khi ảnh đang được chọn để xóa */
.image-card.selected {
  border-color: var(--danger);
  background: #fef2f2;
  box-shadow: 0 0 0 1px rgba(239, 68, 68, 0.2);
  transform: translateY(-1px);
}

/* Nút tick nhỏ góc trên trái */
.image-card-select-badge {
  position: absolute;
  top: 6px;
  left: 6px;
  width: 18px;
  height: 18px;
  border-radius: 999px;
  border: 1px solid rgba(248, 250, 252, 0.9);
  background: rgba(15, 23, 42, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  color: #e5e7eb;
  opacity: 0;
  transform: translateY(-3px);
  transition: opacity 0.15s ease, transform 0.15s ease, background 0.15s ease;
}

.image-card:hover .image-card-select-badge {
  opacity: 1;
  transform: translateY(0);
}

.image-card.selected .image-card-select-badge {
  opacity: 1;
  background: #ef4444;
}
.btn-danger {
  background: var(--danger);
  color: #fff;
  box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}
.btn-danger:disabled {
  opacity: 0.5;
  cursor: default;
  box-shadow: none;
}
/* Icon bên trong button */
button .btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

button .btn-icon svg {
  width: 14px;
  height: 14px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.8;
}

/* ===== FILE INPUT ĐẸP HƠN ===== */

.file-input {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.file-input input[type="file"] {
  display: none; /* Ẩn input gốc, dùng label để trigger */
}

/* Nút chọn file */
.file-input-trigger {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--primary-soft);
  background: #ffffff;
  color: var(--primary);
  font-size: 13px;
  cursor: pointer;
  box-shadow: 0 4px 10px rgba(37, 99, 235, 0.12);
  transition: background 0.15s ease, box-shadow 0.15s ease, transform 0.05s ease;
}

.file-input-trigger:hover {
  background: #eff6ff;
  box-shadow: 0 6px 16px rgba(37, 99, 235, 0.18);
}

.file-input-trigger:active {
  transform: translateY(1px);
  box-shadow: none;
}

/* Icon trong nút */
.file-input-trigger .btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.file-input-trigger .btn-icon svg {
  width: 14px;
  height: 14px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.8;
}

/* Text hiển thị tên file */
.file-input-text {
  font-size: 12px;
  color: var(--muted);
  max-width: 260px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}


.image-card:hover {
  border-color: var(--primary);
  box-shadow: 0 0 0 1px rgba(37, 99, 235, 0.25);
  background: #ffffff;
  transform: translateY(-1px);
}

.image-thumb-large {
  width: 120px;
  height: 120px;
  object-fit: cover;
  border-radius: 8px;
}

/* ===== PREVIEW & ZOOM ẢNH ===== */

.variant-img-preview {
  margin-top: 4px;
  max-width: 80px;
  max-height: 80px;
  border-radius: 6px;
  border: 1px solid var(--border);
  object-fit: cover;
  cursor: zoom-in;
}

.img-zoom-wrapper {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.img-zoom-container {
  position: relative;
  display: inline-block;
  max-width: 380px;
}

.img-zoom-container img {
  max-width: 100%;
  border-radius: 10px;
  border: 1px solid var(--border);
}

.img-zoom-lens {
  position: absolute;
  border: 1px solid #d4d4d4;
  width: 80px;
  height: 80px;
  background: rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(2px);
}

.img-zoom-result {
  border: 1px solid var(--border);
  border-radius: 10px;
  width: 320px;
  height: 320px;
  background-color: #f9fafb;
  background-repeat: no-repeat;
}

/* ===== RESPONSIVE ===== */

@media (max-width: 900px) {
  .sidebar {
    display: none;
  }

  body {
    display: block;
  }

  .main {
    padding: 12px;
  }
}