:root {
  --zalo-blue: #0068ff;
  --white: #ffffff;
  --black: #000000;
  --gray-light: #e0e0e0;
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', sans-serif;
  background: var(--white);
  color: var(--black);
}

/* Theme 3 màu: Trắng, Đen, Xanh Zalo */
html, body {
  background: #ffffff !important;
  color: #000000 !important;
}

.card,
.modal-content,
.offcanvas,
.offcanvas-body,
.list-group-item,
.table,
.accordion-item,
.dropdown-menu {
  background: #ffffff !important;
  color: #000000 !important;
  border-color: var(--gray-light) !important;
}

/* Vùng nền Xanh Zalo - chữ Trắng */
.modern-card,
.card-header,
.accordion-header,
.btn-primary,
.bg-primary,
.navbar {
  background: var(--zalo-blue) !important;
  color: #ffffff !important;
  border-color: var(--zalo-blue) !important;
}

.btn-primary:hover,
.btn-primary:focus {
  background: #0056d6 !important;
  color: #ffffff !important;
}

/* Vùng nền Trắng - chữ Đen */
.card-body,
.modal-body,
.offcanvas-body {
  background: #ffffff !important;
  color: #000000 !important;
}

/* Input/Select/Textarea - nền Trắng, chữ Đen, viền xám */
input,
textarea,
select,
.form-control,
.form-select {
  background-color: #ffffff !important;
  color: #000000 !important;
  border: 1px solid var(--gray-light) !important;
}

input:focus,
textarea:focus,
select:focus,
.form-control:focus,
.form-select:focus {
  outline: none;
  border-color: var(--zalo-blue) !important;
  box-shadow: 0 0 0 0.18rem rgba(0, 104, 255, 0.18) !important;
}

/* Nút danger - viền Xanh Zalo */
.btn-danger {
  background-color: #ffffff !important;
  color: var(--zalo-blue) !important;
  border: 2px solid var(--zalo-blue) !important;
}

.btn-danger:hover {
  background-color: var(--zalo-blue) !important;
  color: #ffffff !important;
}

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

button,
input,
textarea,
select,
.form-control,
.form-select {
  font-family: inherit;
  font-size: 16px !important;
}

input,
textarea,
select,
.form-control,
.form-select {
  min-height: 48px;
  border-radius: 14px;
  border: 1px solid var(--gray-light);
  background-color: #ffffff;
  color: #000000;
}

button,
.btn,
.btn-modern {
  border-radius: 14px;
  min-height: 50px;
  font-weight: 700;
  transition: transform 0.14s ease, box-shadow 0.14s ease;
}

.btn:hover,
.btn:focus {
  transform: translateY(-1px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.08);
}

.btn:active {
  transform: translateY(0);
}

.modern-card {
  border-radius: 20px;
  background: #ffffff;
  box-shadow: 0 10px 22px rgba(0, 0, 0, 0.06);
}

.bottom-nav {
  padding: 12px 0;
  background: #ffffff !important;
  border-top: 1px solid var(--gray-light) !important;
}

.bottom-nav a {
  min-height: 56px;
  padding: 10px 0;
  touch-action: manipulation;
  color: var(--zalo-blue) !important;
}

.bottom-nav a i {
  font-size: 18px;
  color: var(--zalo-blue) !important;
}

.bottom-nav a span {
  color: var(--zalo-blue) !important;
}

.bottom-nav a.active {
  color: var(--zalo-blue) !important;
  background: rgba(0, 104, 255, 0.1) !important;
  border-radius: 12px;
}

.pwa-install-btn {
  position: fixed;
  right: 16px;
  bottom: 92px;
  z-index: 1100;
  padding: 0.85rem 1.1rem;
  border-radius: 999px;
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.12);
  background: var(--zalo-blue);
  color: #ffffff;
}

.pwa-install-btn.d-none {
  display: none !important;
}

button,
a,
input,
select,
textarea {
  touch-action: manipulation;
}

@media (max-width: 768px) {
  .container {
    padding-left: 12px;
    padding-right: 12px;
  }
  .btn,
  .btn-modern {
    width: 100%;
  }
}

/* Scroll lock cho modal/popup trên mobile */
body.modal-open {
  overflow: hidden !important;
  position: fixed !important;
  width: 100% !important;
  height: 100% !important;
}

.modal.show {
  overflow-y: auto !important;
  -webkit-overflow-scrolling: touch !important;
}

.modal-body {
  overflow-y: auto !important;
  -webkit-overflow-scrolling: touch !important;
  max-height: calc(100vh - 200px);
}

.offcanvas.show {
  overflow-y: auto !important;
  -webkit-overflow-scrolling: touch !important;
}

.offcanvas-body {
  overflow-y: auto !important;
  -webkit-overflow-scrolling: touch !important;
  max-height: calc(100vh - 100px);
}