/* Import Inter font - aesthetic, modern, hỗ trợ tiếng Việt */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');
/* Additional fonts used for the introduction page styling to match reference */
@import url('https://fonts.googleapis.com/css2?family=Cabin:ital,wght@0,400;0,600;0,700;1,400&family=Lobster+Two:wght@400;700&display=swap');

/* === ROOT VARIABLES === */
:root {
  /* Colors - Aesthetic Palette */
  --primary-color: #2D2D2D;
  --secondary-color: #6B6B6B;
  --accent-color: #C9A66B;
  --accent-hover: #B89555;
  --background: #FAFAF8;
  --surface: #FFFFFF;
  --text-primary: #1A1A1A;
  --text-secondary: #6B6B6B;
  --text-muted: #9E9E9E;
  --border-color: #E8E8E6;
  --success: #4A7C59;
  --error: #C44536;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  
  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);

  /* Intro page accent palette (matches provided design) */
  --intro-accent: #afbf82; /* olive accent */
  --intro-accent-dark: #8ea667;
}

/* === BASE STYLES === */
* {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

html {
  font-size: 15px;
  position: relative;
  min-height: 100%;
}

@media (min-width: 768px) {
  html {
    font-size: 16px;
  }
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--background);
  color: var(--text-primary);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

body > .container { 
  flex: 1 0 auto; 
}

body > .content { 
  flex: 1 0 auto; 
}

.site-footer, .admin-footer, body > footer { 
  margin-top: auto; 
}

/* === BUTTONS === */
.btn {
  font-family: 'Inter', sans-serif;
  font-weight: 500;
  letter-spacing: -0.01em;
  border-radius: var(--radius-md);
  padding: 0.625rem 1.5rem;
  border: none;
  transition: all 0.2s ease;
  text-decoration: none;
  display: inline-block;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

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

.btn-primary {
  background-color: var(--primary-color);
  color: white;
  font-family: 'Inter', sans-serif;
}

.btn-primary:hover {
  background-color: #1A1A1A;
  color: white;
}

.btn-secondary {
  background-color: var(--accent-color);
  color: white;
  font-family: 'Inter', sans-serif;
}

.btn-secondary:hover {
  background-color: var(--accent-hover);
  color: white;
}

.btn-outline-primary {
  background-color: transparent;
  border: 1.5px solid var(--primary-color);
  color: var(--primary-color);
  font-family: 'Inter', sans-serif;
}

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

.btn-outline-secondary {
  background-color: transparent;
  border: 1.5px solid var(--border-color);
  color: var(--text-secondary);
  font-family: 'Inter', sans-serif;
}

.btn-outline-secondary:hover {
  background-color: var(--surface);
  border-color: var(--secondary-color);
  color: var(--text-primary);
}

.btn-outline-danger {
  background-color: transparent;
  border: 1.5px solid var(--error);
  color: var(--error);
  font-family: 'Inter', sans-serif;
}

.btn-outline-danger:hover {
  background-color: var(--error);
  color: white;
  border-color: var(--error);
}

.btn-sm {
  padding: 0.375rem 1rem;
  font-size: 0.875rem;
}

.btn-lg {
  padding: 0.875rem 2rem;
  font-size: 1.125rem;
}

/* === FORMS === */
.form-control, .form-select {
  font-family: 'Inter', sans-serif;
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.625rem 1rem;
  transition: all 0.2s ease;
  background-color: var(--surface);
}

.form-control:focus, .form-select:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(45, 45, 45, 0.1);
  outline: none;
}

.form-label {
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
}

.form-check-input:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(45, 45, 45, 0.1);
}

.form-check-input:checked {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
}

/* === CARDS === */
.card {
  background-color: var(--surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
  overflow: hidden;
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.card-header {
  background-color: var(--surface);
  border-bottom: 1px solid var(--border-color);
  padding: 1.25rem 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
}

.card-body {
  padding: 1.5rem;
}

.card-title {
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  font-size: 1.125rem;
}

.card-text {
  color: var(--text-secondary);
  line-height: 1.6;
}

/* === NAVBAR === */
.navbar {
  font-family: 'Inter', sans-serif;
  padding: 1rem 0;
  box-shadow: var(--shadow-sm);
  background-color: var(--surface) !important;
  border-bottom: 1px solid var(--border-color);
}

.navbar-brand {
  font-weight: 700;
  font-size: 1.5rem;
  letter-spacing: -0.02em;
  color: var(--text-primary) !important;
}

.nav-link {
  font-weight: 500;
  color: var(--text-secondary) !important;
  transition: color 0.2s ease;
  padding: 0.5rem 1rem !important;
}

.nav-link:hover {
  color: var(--text-primary) !important;
}

.cart-badge {
  top: 0;
  left: 100%;
  transform: translate(-50%, -50%);
  background-color: var(--accent-color) !important;
  font-size: 0.75rem;
  padding: 0.25rem 0.5rem;
}

/* === FOOTER === */
.site-footer {
  background-color: var(--primary-color);
  color: #E8E8E6;
  padding: 3rem 0 1rem;
  margin-top: 4rem;
}

.site-footer h6 {
  color: var(--accent-color);
  font-weight: 600;
  font-size: 0.875rem;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
}

.site-footer .footer-hr {
  border-color: rgba(255, 255, 255, 0.1);
  margin: 2rem 0 1.5rem;
}

.site-footer a {
  color: var(--accent-color);
  text-decoration: none;
  transition: color 0.2s ease;
}

.site-footer a:hover {
  color: var(--accent-hover);
}

.site-footer .small {
  font-size: 0.875rem;
  color: #9E9E9E;
}

/* === ADMIN LAYOUT === */
.admin-body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: #F5F5F5;
}

.admin-body > nav { 
  flex: 0 0 auto; 
}

.admin-body > .sidebar { 
  flex: 0 0 auto; 
}

.admin-body .admin-footer { 
  flex: 0 0 auto;
  margin-top: auto; 
}

.admin-body .content { 
  flex: 1 0 auto; 
}

.admin-footer {
  background-color: var(--primary-color);
  color: white;
  padding: 1.5rem 0;
}

/* === TABLES === */
.table {
  background-color: var(--surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.table thead th {
  background-color: var(--background);
  color: var(--text-primary);
  font-weight: 600;
  border-bottom: 2px solid var(--border-color);
  padding: 1rem;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.table tbody td {
  padding: 1rem;
  vertical-align: middle;
  border-bottom: 1px solid var(--border-color);
}

/* === ALERTS === */
.alert {
  border-radius: var(--radius-md);
  border: none;
  padding: 1rem 1.25rem;
  font-weight: 500;
}

.alert-info {
  background-color: #E8F4F8;
  color: #0C5460;
}

.alert-success {
  background-color: #E8F5E9;
  color: var(--success);
}

.alert-danger {
  background-color: #FFEBEE;
  color: var(--error);
}

/* === PAGINATION === */
.pagination {
  gap: 0.5rem;
}

.page-link {
  font-family: 'Inter', sans-serif;
  border: 1.5px solid var(--border-color);
  color: var(--text-primary);
  border-radius: var(--radius-md);
  padding: 0.5rem 1rem;
  font-weight: 500;
  transition: all 0.2s ease;
}

.page-link:hover {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
  color: white;
}

.page-item.active .page-link {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
  color: white;
}

.page-item.disabled .page-link {
  background-color: var(--background);
  border-color: var(--border-color);
  color: var(--text-muted);
}

/* === UTILITIES === */
.text-muted {
  color: var(--text-muted) !important;
}

.fw-semibold {
  font-weight: 600;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

h1 { font-size: 2.5rem; margin-bottom: 1.5rem; }
h2 { font-size: 2rem; margin-bottom: 1.25rem; }
h3 { font-size: 1.5rem; margin-bottom: 1rem; }
h4 { font-size: 1.25rem; margin-bottom: 0.875rem; }

/* === ANIMATIONS === */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.fade-in {
  animation: fadeIn 0.3s ease;
}

/* === INTRO PAGE SCOPED STYLES (fonts & colors) === */
.intro-page, .intro-page * {
  font-family: 'Cabin', -apple-system, BlinkMacSystemFont, sans-serif;
}

.intro-page h1,
.intro-page h2,
.intro-page h3,
.intro-page .display-4 {
  font-family: 'Lobster Two', cursive;
  color: #7C8B5B; /* heading olive tone seen in reference */
}

.intro-page .btn.btn-light {
  color: #000;
}

.intro-page .btn.btn-dark,
.intro-page .btn.btn-primary {
  background-color: #000;
  border-color: #000;
}

.intro-page .ratio.rounded-circle img {
  object-fit: cover;
}

.intro-page .section-divider { width: 40px; height: 2px; background: #e5e5e5; margin: 0 auto 1.25rem; }