/* ==========================================================================
   DONGVON.COM - MODERN FINTECH DESIGN SYSTEM
   Primary: Deep Navy #002046 | Accent/CTA: Royal Gold #C5A059
   Typography: Playfair Display (Headings) & Montserrat / Inter (Body)
   ========================================================================== */

:root {
  /* Color Palette */
  --color-primary: #002046;
  --color-primary-dark: #00132b;
  --color-primary-light: #0d386b;
  --color-accent: #C5A059;
  --color-accent-hover: #dfba6b;
  --color-accent-light: #f6efe1;
  --color-accent-dark: #9a7836;
  
  --color-bg: #F8F9FA;
  --color-surface: #FFFFFF;
  --color-surface-elevated: #FFFFFF;
  --color-border: #E2E8F0;
  --color-border-dark: rgba(255, 255, 255, 0.12);
  
  --color-text-main: #0F172A;
  --color-text-muted: #64748B;
  --color-text-light: #94A3B8;
  --color-text-inverse: #FFFFFF;
  
  /* Status Colors */
  --color-success: #10B981;
  --color-success-bg: #ECFDF5;
  --color-warning: #F59E0B;
  --color-warning-bg: #FFFBEB;
  --color-danger: #EF4444;
  --color-danger-bg: #FEF2F2;
  --color-info: #0284C7;
  --color-info-bg: #F0F9FF;

  /* Typography */
  --font-heading: 'Playfair Display', Georgia, serif;
  --font-body: 'Montserrat', 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 32, 70, 0.08), 0 2px 4px -1px rgba(0, 32, 70, 0.04);
  --shadow-lg: 0 10px 25px -3px rgba(0, 32, 70, 0.12), 0 4px 6px -2px rgba(0, 32, 70, 0.05);
  --shadow-xl: 0 20px 35px -5px rgba(0, 32, 70, 0.18), 0 10px 10px -5px rgba(0, 32, 70, 0.04);
  --shadow-gold: 0 4px 18px 0 rgba(197, 160, 89, 0.35);

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
  --transition-smooth: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  
  /* Borders */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  
  /* Layout */
  --container-max: 1240px;
  --nav-height: 80px;
}

/* Reset & Global */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-body);
  color: var(--color-text-main);
  background-color: var(--color-bg);
  line-height: 1.65;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

img, svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

button, input, select, textarea {
  font: inherit;
}

/* Typography Helpers */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--color-primary);
  font-weight: 700;
  line-height: 1.25;
}

h1 { font-size: clamp(2.2rem, 4vw, 3.2rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.75rem, 3vw, 2.3rem); letter-spacing: -0.01em; margin-bottom: 0.75rem; }
h3 { font-size: 1.35rem; margin-bottom: 0.5rem; }
h4 { font-size: 1.15rem; }

p {
  margin-bottom: 1rem;
}

p.lead {
  font-size: 1.15rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* Layout Elements */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

.section {
  padding: 70px 0;
}

.section-dark {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
}
.section-dark h2, .section-dark h3 {
  color: var(--color-text-inverse);
}
.section-dark p {
  color: rgba(255, 255, 255, 0.85);
}

.section-accent {
  background: linear-gradient(135deg, #fefcf9 0%, #f7f1e6 100%);
  border-top: 1px solid rgba(197, 160, 89, 0.2);
  border-bottom: 1px solid rgba(197, 160, 89, 0.2);
}

/* Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: all var(--transition-normal);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.5rem;
  font-weight: 800;
  font-family: var(--font-heading);
  color: var(--color-primary);
}

.brand-badge {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: var(--color-accent);
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 1.25rem;
  box-shadow: var(--shadow-md);
  border: 1.5px solid var(--color-accent);
}

.brand-logo-img {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  object-fit: cover;
  box-shadow: var(--shadow-md);
  border: 1.5px solid var(--color-accent);
  background: #001736;
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

.brand-logo:hover .brand-logo-img {
  transform: scale(1.05);
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-name {
  color: var(--color-primary);
  line-height: 1.1;
  letter-spacing: -0.01em;
}

.brand-name span {
  color: var(--color-accent);
}

.brand-tagline {
  font-family: var(--font-body);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  font-weight: 600;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  list-style: none;
}

.nav-link {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--color-text-main);
  padding: 8px 0;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-link:hover, .nav-link.active {
  color: var(--color-accent);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--color-accent);
  border-radius: var(--radius-full);
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: 15px;
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--color-primary);
  cursor: pointer;
}

/* Primary Button & CTA */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 700;
  font-size: 0.92rem;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-normal);
  text-align: center;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  background-color: var(--color-primary-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-accent {
  background: linear-gradient(135deg, var(--color-accent) 0%, #b38b42 100%);
  color: #FFFFFF;
  box-shadow: var(--shadow-gold);
  border-color: #dfba6b;
}

.btn-accent:hover {
  background: linear-gradient(135deg, var(--color-accent-hover) 0%, var(--color-accent) 100%);
  transform: translateY(-2px);
  box-shadow: 0 6px 22px rgba(197, 160, 89, 0.45);
}

.btn-outline-gold {
  background: transparent;
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.btn-outline-gold:hover {
  background-color: var(--color-accent);
  color: #FFFFFF;
}

.btn-outline-white {
  background: transparent;
  color: #FFFFFF;
  border-color: rgba(255, 255, 255, 0.4);
}

.btn-outline-white:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: #FFFFFF;
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.84rem;
}

.btn-lg {
  padding: 16px 32px;
  font-size: 1.05rem;
}

/* Main Content Area */
#app {
  flex: 1;
}

/* Cards & Containers */
.card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  padding: 28px;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.card-gold-accent {
  border-top: 4px solid var(--color-accent);
}

/* Grid Utilities */
.grid {
  display: grid;
  gap: 24px;
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 992px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .grid-2 { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  .mobile-toggle { display: block; }
  .nav-cta .btn-consult { display: none; }
}

@media (max-width: 640px) {
  .grid-4 { grid-template-columns: 1fr; }
}

/* Site Footer (Ground Truth Compliance) */
.site-footer {
  background-color: var(--color-primary);
  color: #ffffff;
  padding: 50px 20px 30px;
  border-top: 3px solid var(--color-accent);
}

.footer-container {
  max-width: var(--container-max);
  margin: 0 auto;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.8fr 1fr 1fr 1fr;
  gap: 36px;
  margin-bottom: 40px;
}

@media (max-width: 992px) {
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 600px) {
  .footer-top {
    grid-template-columns: 1fr;
  }
}

.footer-title {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  color: #FFFFFF;
  margin-bottom: 18px;
  position: relative;
  padding-bottom: 10px;
}

.footer-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 35px;
  height: 2px;
  background-color: var(--color-accent);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  color: #cbd5e1;
  font-size: 0.9rem;
  transition: all var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-accent);
  padding-left: 5px;
}

.legal-badge-card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 16px 18px;
  border-radius: var(--radius-md);
  margin-top: 15px;
}

.legal-badge-card p {
  font-size: 0.85rem;
  line-height: 1.55;
  color: #cbd5e1;
  margin-bottom: 5px;
}

.legal-badge-card p:first-child {
  font-size: 0.95rem;
  color: #ffffff;
  margin-bottom: 6px;
}

.legal-badge-card p:last-child {
  margin-bottom: 0;
}

.legal-badge-card a {
  color: var(--color-accent);
  text-decoration: none;
  transition: opacity var(--transition-fast);
}

.legal-badge-card a:hover {
  opacity: 0.8;
  text-decoration: underline;
}

.footer-disclaimer {
  color: #94a3b8;
  font-size: 0.82rem;
  line-height: 1.6;
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-style: italic;
}

.footer-bottom {
  margin-top: 25px;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 15px;
  font-size: 0.85rem;
  color: #94a3b8;
}

.footer-policy-links a {
  color: var(--color-accent);
  text-decoration: none;
  margin: 0 8px;
}

.footer-policy-links a:hover {
  text-decoration: underline;
}

/* Compliance Checkbox */
.form-consent-group {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin: 18px 0;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

.form-consent-group input[type="checkbox"] {
  accent-color: var(--color-accent);
  margin-top: 3px;
  width: 17px;
  height: 17px;
  cursor: pointer;
  flex-shrink: 0;
}

.form-consent-group label {
  cursor: pointer;
}

.form-consent-group a {
  color: var(--color-accent-dark);
  font-weight: 600;
  text-decoration: underline;
}

/* Article & Content Styling */
.article-container {
  max-width: 860px;
  margin: 0 auto;
  padding: 50px 20px 80px;
}

.article-header {
  margin-bottom: 35px;
  padding-bottom: 25px;
  border-bottom: 1px solid var(--color-border);
}

.article-category {
  display: inline-block;
  background: var(--color-accent-light);
  color: var(--color-accent-dark);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 5px 12px;
  border-radius: var(--radius-full);
  margin-bottom: 15px;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 0.88rem;
  color: var(--color-text-muted);
  margin-top: 15px;
}

.article-meta-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.article-content {
  font-size: 1.08rem;
  line-height: 1.8;
  color: #1e293b;
}

.article-content h2 {
  margin-top: 40px;
  margin-bottom: 18px;
  font-size: 1.65rem;
  color: var(--color-primary);
  border-left: 4px solid var(--color-accent);
  padding-left: 15px;
}

.article-content h3 {
  margin-top: 28px;
  margin-bottom: 12px;
  font-size: 1.3rem;
  color: var(--color-primary-light);
}

.article-content ul, .article-content ol {
  margin: 18px 0 24px 24px;
}

.article-content li {
  margin-bottom: 8px;
}

.article-callout {
  background: #f8fafc;
  border-left: 4px solid var(--color-primary);
  padding: 20px 24px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 28px 0;
}

.article-callout.warning {
  background: var(--color-danger-bg);
  border-left-color: var(--color-danger);
}

.article-callout.gold {
  background: var(--color-accent-light);
  border-left-color: var(--color-accent);
}

.article-table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 28px 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.table-custom {
  width: 100%;
  min-width: 800px;
  border-collapse: collapse;
  font-size: 0.95rem;
  text-align: left;
}

.table-custom th {
  background-color: var(--color-primary);
  color: #ffffff;
  padding: 14px 18px;
  font-weight: 600;
}

.table-custom td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--color-border);
  background-color: #ffffff;
}

.table-custom tr:nth-child(even) td {
  background-color: #f8fafc;
}

.table-custom tr:hover td {
  background-color: #f1f5f9;
}

/* Breadcrumb */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 20px;
}

.breadcrumb a {
  color: var(--color-primary);
}

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

/* Toast Notification */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toast {
  background: #ffffff;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xl);
  padding: 14px 20px;
  border-left: 4px solid var(--color-accent);
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 300px;
  font-size: 0.9rem;
  animation: slideInRight 0.3s ease;
}

@keyframes slideInRight {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* ==========================================================================
   FLOATING CONTACT WIDGET (HOTLINE CALL & ZALO CHAT)
   ========================================================================== */
.floating-contact-widget {
  position: fixed;
  bottom: 30px;
  right: 25px;
  z-index: 9990;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 14px;
}

.floating-contact-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 18px 10px 12px;
  border-radius: 50px;
  color: #ffffff;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  box-shadow: 0 8px 24px rgba(0, 32, 70, 0.25);
  transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  position: relative;
}

.floating-contact-btn:hover {
  transform: translateY(-4px) scale(1.03);
  box-shadow: 0 12px 28px rgba(0, 32, 70, 0.35);
  color: #ffffff;
}

.floating-contact-btn.zalo-btn {
  background: linear-gradient(135deg, #0088FF, #0055FF);
}

.floating-contact-btn.phone-btn {
  background: linear-gradient(135deg, #10B981, #059669);
  animation: phonePulse 2.5s infinite;
}

.floating-icon-circle {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 6px rgba(0,0,0,0.15);
  flex-shrink: 0;
}

.floating-icon-circle svg, .floating-icon-circle img {
  width: 22px;
  height: 22px;
}

.floating-pulse-ring {
  position: absolute;
  top: -6px;
  left: -6px;
  right: -6px;
  bottom: -6px;
  border: 2px solid #10B981;
  border-radius: 60px;
  animation: rippleRing 1.8s linear infinite;
  pointer-events: none;
  opacity: 0;
}

@keyframes phonePulse {
  0% { transform: scale(1); }
  5% { transform: scale(1.06) rotate(-5deg); }
  10% { transform: scale(1.06) rotate(5deg); }
  15% { transform: scale(1.06) rotate(-5deg); }
  20% { transform: scale(1.06) rotate(5deg); }
  25% { transform: scale(1); }
  100% { transform: scale(1); }
}

@keyframes rippleRing {
  0% { transform: scale(0.95); opacity: 0.8; }
  100% { transform: scale(1.2); opacity: 0; }
}

@media (max-width: 768px) {
  .floating-contact-btn span.btn-label {
    display: none;
  }
  .floating-contact-btn {
    padding: 0;
    width: 52px;
    height: 52px;
    border-radius: 50%;
    justify-content: center;
  }
  .floating-icon-circle {
    width: 52px;
    height: 52px;
  }
  .floating-contact-widget {
    bottom: 20px;
    right: 16px;
    gap: 12px;
  }
}

/* ==========================================================================
   SOCIAL PROOF / SUCCESS STORIES CARDS
   ========================================================================== */
.success-case-card {
  background: #ffffff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  padding: 24px;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
}

.success-case-card:hover {
  transform: translateY(-5px);
  border-color: var(--color-accent);
  box-shadow: var(--shadow-lg);
}

.case-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(16, 185, 129, 0.12);
  color: #065f46;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 30px;
  margin-bottom: 12px;
}