/* ==========================================================================
   VAY TÀI CHÍNH NHANH 24H - MAIN STYLESHEET
   ========================================================================== */

:root {
  --primary: #00a651;
  --primary-hover: #008842;
  --primary-light: #e6f7ef;
  --primary-gradient: linear-gradient(135deg, #00a651 0%, #059669 100%);
  --secondary: #0f172a;
  --secondary-light: #1e293b;
  --accent: #f59e0b;
  --accent-light: #fef3c7;
  --accent-dark: #92400e;
  --text-main: #1f2937;
  --text-muted: #6b7280;
  --bg-light: #f8fafc;
  --bg-white: #ffffff;
  --border-color: #e5e7eb;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 9999px;
  --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 10px 25px -5px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 20px 40px -15px rgba(0, 0, 0, 0.12);
  --shadow-glow: 0 0 25px rgba(0, 166, 81, 0.25);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-heading: 'Outfit', 'Inter', sans-serif;
}

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

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

body {
  font-family: var(--font-sans);
  color: var(--text-main);
  background-color: #ffffff;
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.25s ease;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* Typography Helpers */
.text-center { text-align: center; }
.text-primary { color: var(--primary); }
.section-tag {
  display: inline-block;
  padding: 6px 16px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: var(--radius-pill);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.section-title {
  font-family: var(--font-heading);
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--secondary);
  line-height: 1.25;
  margin-bottom: 1rem;
}
.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 680px;
  margin: 0 auto 3rem auto;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  font-size: 1rem;
  font-weight: 700;
  border-radius: var(--radius-pill);
  border: none;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  text-align: center;
}
.btn-primary {
  background: var(--primary-gradient);
  color: #ffffff;
  box-shadow: 0 8px 20px rgba(0, 166, 81, 0.3);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 25px rgba(0, 166, 81, 0.45);
  background: linear-gradient(135deg, #059669 0%, #00a651 100%);
}
.btn-secondary {
  background: var(--secondary);
  color: #ffffff;
}
.btn-secondary:hover {
  background: var(--secondary-light);
  transform: translateY(-2px);
}
.btn-outline {
  background: transparent;
  border: 2px solid var(--primary);
  color: var(--primary);
}
.btn-outline:hover {
  background: var(--primary);
  color: #ffffff;
}
.btn-light {
  background: #e5e7eb;
  color: #374151;
}
.btn-light:hover {
  background: #d1d5db;
  color: #111827;
}

/* ==========================================================================
   TOPBAR & HEADER NAVIGATION
   ========================================================================== */
.topbar {
  background: var(--secondary);
  color: #94a3b8;
  font-size: 0.875rem;
  padding: 8px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.topbar-wrapper {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.topbar-info {
  display: flex;
  gap: 20px;
}
.topbar-info-item {
  display: flex;
  align-items: center;
  gap: 6px;
}
.topbar-info-item i {
  color: var(--primary);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  transition: all 0.3s ease;
}
.site-header.scrolled {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
}
.brand-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 900;
  color: var(--secondary);
  white-space: nowrap;
}
.brand-logo i {
  color: var(--primary);
  font-size: 1.45rem;
}
.brand-logo span.highlight {
  color: var(--primary);
}
.nav-menu {
  display: flex;
  align-items: center;
  gap: 14px;
  list-style: none;
}
.nav-link {
  font-weight: 600;
  font-size: 0.85rem;
  color: #334155;
  position: relative;
  padding: 6px 0;
  white-space: nowrap;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width 0.3s ease;
}
.nav-link:hover, .nav-link.active {
  color: var(--primary);
}
.nav-link:hover::after, .nav-link.active::after {
  width: 100%;
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}
.btn-header-call {
  padding: 10px 18px !important;
  font-size: 0.9rem !important;
  white-space: nowrap !important;
}
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--secondary);
  cursor: pointer;
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero-section {
  position: relative;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  color: #ffffff;
  padding: 80px 0 100px 0;
  overflow: hidden;
}
.hero-bg-glow {
  position: absolute;
  top: -20%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0, 166, 81, 0.25) 0%, rgba(0, 0, 0, 0) 70%);
  pointer-events: none;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: center;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0, 166, 81, 0.15);
  border: 1px solid rgba(0, 166, 81, 0.4);
  color: #4ade80;
  padding: 8px 18px;
  border-radius: var(--radius-pill);
  font-weight: 700;
  font-size: 0.9rem;
  margin-bottom: 24px;
}
.hero-title {
  font-family: var(--font-heading);
  font-size: 3.25rem;
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 20px;
}
.hero-title span {
  color: #4ade80;
  background: linear-gradient(90deg, #4ade80, #2dd4bf);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-desc {
  font-size: 1.15rem;
  color: #cbd5e1;
  margin-bottom: 30px;
  line-height: 1.7;
}
.hero-features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-bottom: 35px;
}
.hero-feature-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
  font-weight: 600;
  color: #e2e8f0;
}
.hero-feature-item i {
  color: #4ade80;
  font-size: 1.1rem;
}
.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* Quick Form Card */
.hero-form-card {
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}
.hero-form-title {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 6px;
  color: #ffffff;
}
.hero-form-sub {
  font-size: 0.875rem;
  color: #94a3b8;
  margin-bottom: 24px;
}
.form-group {
  margin-bottom: 18px;
}
.form-label {
  display: block;
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--text-main);
}
.hero-form-card .form-label {
  color: #e2e8f0;
}
.form-control {
  width: 100%;
  padding: 12px 18px;
  font-size: 0.95rem;
  font-family: inherit;
  border-radius: var(--radius-pill);
  border: 2px solid var(--primary);
  background: #ffffff;
  color: var(--text-main);
  outline: none;
  transition: all 0.25s ease;
}
.form-control:focus {
  border-color: var(--primary-hover);
  box-shadow: 0 0 0 4px rgba(0, 166, 81, 0.15);
}

/* ==========================================================================
   LOAN PRODUCTS SECTION (Cá Nhân, Doanh Nghiệp, Hộ Kinh Doanh)
   ========================================================================== */
.products-section {
  padding: 90px 0;
  background: var(--bg-light);
}
.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}
.product-card {
  background: #ffffff;
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  transition: all 0.35s ease;
  position: relative;
  display: flex;
  flex-direction: column;
}
.product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(0, 166, 81, 0.3);
}
.product-card.featured {
  border: 2px solid var(--primary);
}
.product-badge {
  position: absolute;
  top: -14px;
  right: 24px;
  background: var(--primary-gradient);
  color: #ffffff;
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
}
.product-icon {
  width: 64px;
  height: 64px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  margin-bottom: 20px;
}
.product-title {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--secondary);
  margin-bottom: 10px;
}
.product-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 24px;
}
.product-highlights {
  list-style: none;
  margin-bottom: 30px;
  flex-grow: 1;
}
.product-highlights li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 0;
  border-bottom: 1px dashed var(--border-color);
  font-size: 0.925rem;
  font-weight: 600;
}
.product-highlights li i {
  color: var(--primary);;
}
.product-limit {
  background: #f1f5f9;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  margin-bottom: 24px;
  text-align: center;
}
.product-limit-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  font-weight: 700;
}
.product-limit-val {
  font-size: 1.25rem;
  font-weight: 900;
  color: var(--primary);
}

/* ==========================================================================
   LOAN ESTIMATOR CALCULATOR (ƯỚC TÍNH KHOẢN VAY)
   ========================================================================== */
.calculator-section {
  padding: 90px 0;
  background: #ffffff;
}
.calculator-wrapper {
  background: #ffffff;
  border-radius: var(--radius-lg);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.07);
  border: 1px solid #e2e8f0;
  padding: 40px;
  max-width: 960px;
  margin: 0 auto;
}
.calc-header-title {
  text-align: center;
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 900;
  color: #00a651;
  text-transform: uppercase;
  margin-bottom: 24px;
  letter-spacing: 0.5px;
}
.calc-sub-note {
  color: #64748b;
  font-size: 0.95rem;
  margin-bottom: 28px;
}

/* Form Inputs Layout */
.calc-form-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-bottom: 24px;
}
.calc-form-group {
  margin-bottom: 24px;
}
.calc-label {
  display: block;
  font-size: 0.95rem;
  font-weight: 700;
  color: #1e293b;
  margin-bottom: 8px;
}
.calc-input {
  width: 100%;
  padding: 12px 20px;
  font-size: 0.95rem;
  font-family: inherit;
  border-radius: var(--radius-pill);
  border: 1.5px solid #00a651;
  background: #ffffff;
  outline: none;
  transition: all 0.2s ease;
}
.calc-input:focus {
  box-shadow: 0 0 0 3px rgba(0, 166, 81, 0.15);
}
select.calc-input {
  appearance: none;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%200a651' viewBox='0 0 16 16'><path d='M7.247 11.14 2.451 5.658C1.885 5.013 2.345 4 3.204 4h9.592a1 1 0 0 1 .753 1.659l-4.796 5.48a1 1 0 0 1-1.506 0z'/></svg>");
  background-repeat: no-repeat;
  background-position: right 20px center;
  background-size: 14px;
  padding-right: 44px;
  cursor: pointer;
}

/* Sliders Section */
.calc-slider-block {
  margin-bottom: 32px;
}
.calc-slider-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}
.calc-slider-title {
  font-size: 1.1rem;
  font-weight: 800;
  color: #0f172a;
}
.calc-slider-badge {
  background: #0e9f6e;
  color: #ffffff;
  font-size: 1.05rem;
  font-weight: 800;
  padding: 6px 18px;
  border-radius: var(--radius-pill);
}

/* Custom Range Input styling */
.calc-range-wrapper {
  position: relative;
  margin-bottom: 8px;
}
input[type="range"].calc-range {
  -webkit-appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 4px;
  background: #333333;
  outline: none;
  cursor: pointer;
}
input[type="range"].calc-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: #0e9f6e;
  border: 3px solid #ffffff;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
  cursor: pointer;
  transition: transform 0.15s ease;
}
input[type="range"].calc-range::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}
.calc-range-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  color: #64748b;
  font-weight: 600;
}
.calc-range-current {
  color: #0e9f6e;
  font-weight: 800;
}

/* Estimation Results Container */
.calc-result-box {
  background: #f8fafc;
  border-radius: var(--radius-md);
  border: 1px solid #e2e8f0;
  padding: 28px;
  margin-top: 24px;
}
.calc-result-title {
  font-size: 1.3rem;
  font-weight: 800;
  color: #0f172a;
  margin-bottom: 16px;
}
.calc-alert-prompt {
  background: #fef3c7;
  color: #92400e;
  padding: 14px 20px;
  border-radius: var(--radius-pill);
  font-size: 0.925rem;
  font-weight: 600;
  text-align: center;
  margin-bottom: 24px;
}
.calc-metrics-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}
.calc-metric-card {
  background: #ffffff;
  padding: 16px 20px;
  border-radius: var(--radius-md);
  border: 1px solid #e2e8f0;
  text-align: center;
}
.calc-metric-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 4px;
  font-weight: 600;
}
.calc-metric-val {
  font-size: 1.25rem;
  font-weight: 900;
  color: #0e9f6e;
}
.calc-action-row {
  display: flex;
  justify-content: flex-end;
  gap: 16px;
  margin-top: 24px;
}
.btn-calc-reset {
  background: #e5e7eb;
  color: #374151;
  padding: 12px 32px;
  border-radius: var(--radius-pill);
  font-weight: 800;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
}
.btn-calc-reset:hover {
  background: #d1d5db;
}
.btn-calc-submit {
  background: #0e9f6e;
  color: #ffffff;
  padding: 12px 36px;
  border-radius: var(--radius-pill);
  font-weight: 800;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 4px 12px rgba(14, 159, 110, 0.3);
}
.btn-calc-submit:hover {
  background: #059669;
  transform: translateY(-2px);
}

/* Detailed Amortization Table */
.calc-schedule-toggle {
  text-align: center;
  margin-top: 16px;
}
.btn-toggle-schedule {
  background: none;
  border: none;
  color: #0e9f6e;
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  text-decoration: underline;
}
.calc-schedule-table-wrap {
  display: none;
  margin-top: 20px;
  max-height: 280px;
  overflow-y: auto;
  border: 1px solid #e2e8f0;
  border-radius: var(--radius-sm);
}
.calc-schedule-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}
.calc-schedule-table th, .calc-schedule-table td {
  padding: 10px 14px;
  text-align: right;
  border-bottom: 1px solid #e2e8f0;
}
.calc-schedule-table th:first-child, .calc-schedule-table td:first-child {
  text-align: center;
}
.calc-schedule-table th {
  background: #f1f5f9;
  font-weight: 700;
  color: #1e293b;
  position: sticky;
  top: 0;
}

/* ==========================================================================
   WHY CHOOSE US / ADVANTAGES
   ========================================================================== */
.why-section {
  padding: 90px 0;
  background: var(--secondary);
  color: #ffffff;
  position: relative;
}
.why-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}
.why-card {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}
.why-card:hover {
  background: rgba(255, 255, 255, 0.08);
  transform: translateY(-5px);
  border-color: rgba(0, 166, 81, 0.4);
}
.why-icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: rgba(0, 166, 81, 0.2);
  color: #4ade80;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
}
.why-title {
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 10px;
  color: #ffffff;
}
.why-desc {
  color: #94a3b8;
  font-size: 0.925rem;
  line-height: 1.6;
}

/* ==========================================================================
   4-STEP PROCESS
   ========================================================================== */
.process-section {
  padding: 90px 0;
  background: var(--bg-light);
}
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
}
.process-card {
  background: #ffffff;
  border-radius: var(--radius-lg);
  padding: 32px 20px;
  text-align: center;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  position: relative;
}
.process-step-num {
  position: absolute;
  top: -16px;
  left: 50%;
  transform: translateX(-50%);
  width: 36px;
  height: 36px;
  background: var(--primary-gradient);
  color: #ffffff;
  border-radius: 50%;
  font-weight: 900;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 10px rgba(0, 166, 81, 0.3);
}
.process-icon {
  font-size: 2.2rem;
  color: var(--primary);
  margin: 15px 0;
}
.process-title {
  font-size: 1.15rem;
  font-weight: 800;
  margin-bottom: 8px;
  color: var(--secondary);
}
.process-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* ==========================================================================
   DOCUMENTS & REQUIREMENTS TABS
   ========================================================================== */
.docs-section {
  padding: 90px 0;
  background: #ffffff;
}
.tabs-header {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 40px;
}
.tab-btn {
  padding: 12px 28px;
  border-radius: var(--radius-pill);
  border: 1.5px solid var(--border-color);
  background: #ffffff;
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.25s ease;
  white-space: nowrap;
}
.tab-btn.active, .tab-btn:hover {
  background: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
}
.tab-content {
  display: none;
  background: var(--bg-light);
  border-radius: var(--radius-lg);
  padding: 40px;
  border: 1px solid var(--border-color);
}
.tab-content.active {
  display: block;
}
.docs-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
}
.doc-box-title {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--secondary);
  margin-bottom: 16px;
}
.doc-list {
  list-style: none;
}
.doc-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 12px;
  font-size: 0.95rem;
}
.doc-list li i {
  color: var(--primary);
  margin-top: 4px;
}

/* ==========================================================================
   TESTIMONIALS & FAQ
   ========================================================================== */
.testimonial-section {
  padding: 90px 0;
  background: var(--bg-light);
}
.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.testimonial-card {
  background: #ffffff;
  border-radius: var(--radius-lg);
  padding: 30px;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}
.testimonial-stars {
  color: #f59e0b;
  margin-bottom: 14px;
}
.testimonial-quote {
  font-style: italic;
  color: var(--text-main);
  font-size: 0.95rem;
  margin-bottom: 20px;
  line-height: 1.6;
}
.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
}
.author-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
}
.author-name {
  font-weight: 800;
  color: var(--secondary);
  font-size: 0.95rem;
}
.author-role {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.faq-section {
  padding: 90px 0;
  background: #ffffff;
}
.faq-accordion {
  max-width: 800px;
  margin: 0 auto;
}
.faq-item {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 16px;
  overflow: hidden;
}
.faq-question {
  width: 100%;
  padding: 20px 24px;
  background: #ffffff;
  border: none;
  text-align: left;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--secondary);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}
.faq-answer {
  display: none;
  padding: 0 24px 20px 24px;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
}
.faq-item.active .faq-answer {
  display: block;
}
.faq-item.active .faq-question {
  color: var(--primary);;
}
.faq-item.active .faq-question i {
  transform: rotate(180deg);
}

/* ==========================================================================
   FOOTER & FLOATING WIDGETS
   ========================================================================== */
.site-footer {
  background: #090d16;
  color: #94a3b8;
  padding: 70px 0 30px 0;
  font-size: 0.925rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 50px;
}
.footer-brand {
  color: #ffffff;
}
.footer-title {
  color: #ffffff;
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 800;
  margin-bottom: 20px;
}
.footer-links {
  list-style: none;
}
.footer-links li {
  margin-bottom: 10px;
}
.footer-links a:hover {
  color: #4ade80;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 25px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
}

/* Floating Action Bar */
.floating-bar {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 999;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.float-btn {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-size: 1.3rem;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
  transition: all 0.3s ease;
  position: relative;
}
.float-btn:hover {
  transform: scale(1.1);
}
.float-btn.phone { background: #00a651; }
.float-btn.zalo { background: #0084ff; }
.float-btn.calc { background: #f59e0b; }

/* Responsive Breakpoints */
@media (max-width: 992px) {
  .hero-grid, .products-grid, .why-grid, .footer-grid, .docs-grid {
    grid-template-columns: 1fr;
  }
  .process-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .testimonial-grid {
    grid-template-columns: 1fr;
  }
  .nav-menu {
    display: none;
  }
  .mobile-toggle {
    display: block;
    margin-left: 10px;
  }
  .hero-title {
    font-size: 2.25rem;
  }
  .calc-form-row, .calc-metrics-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .hide-mobile {
    display: none !important;
  }
  .topbar {
    padding: 6px 0;
  }
  .topbar-wrapper {
    justify-content: center;
    text-align: center;
  }
  .topbar-info-item {
    font-size: 0.8rem;
    white-space: nowrap;
  }
  .navbar {
    padding: 10px 0;
  }
  .brand-logo {
    font-size: 1.15rem;
    gap: 6px;
  }
  .brand-logo i {
    font-size: 1.35rem;
  }
  .btn-header-call {
    padding: 8px 12px !important;
    font-size: 0.8rem !important;
    white-space: nowrap !important;
    letter-spacing: 0px;
  }
  .btn-header-call i {
    font-size: 0.9rem;
  }
  .hero-section {
    padding: 40px 0 60px 0;
  }
  .hero-badge {
    font-size: 0.75rem;
    padding: 6px 12px;
    margin-bottom: 16px;
    display: inline-flex;
    align-items: center;
    line-height: 1.3;
    text-align: left;
  }
  .hero-title {
    font-size: 1.85rem;
    line-height: 1.2;
    margin-bottom: 16px;
  }
  .hero-desc {
    font-size: 1rem;
    margin-bottom: 24px;
  }
  .hero-features-grid {
    grid-template-columns: 1fr;
    gap: 10px;
    margin-bottom: 24px;
  }
  .hero-form-card {
    padding: 24px 20px;
  }
  .calc-action-row {
    flex-direction: column !important;
    gap: 12px !important;
    width: 100%;
  }
  .btn-calc-reset, .btn-calc-submit {
    width: 100% !important;
    text-align: center;
    padding: 14px 20px !important;
    white-space: nowrap !important;
  }
  .tabs-header {
    flex-direction: column !important;
    align-items: stretch !important;
    gap: 10px !important;
  }
  .tab-btn {
    width: 100% !important;
    text-align: center !important;
    padding: 12px 20px !important;
  }
}

@media (max-width: 480px) {
  .brand-logo span {
    display: none; /* Hide brand text on extremely small screens to make room */
  }
  .brand-logo::after {
    content: 'chovaytinchap50';
    font-size: 1.1rem;
    font-weight: 900;
  }
  .btn-header-call {
    padding: 6px 10px !important;
    font-size: 0.75rem !important;
  }
  .hero-title {
    font-size: 1.65rem;
  }
  .calculator-wrapper {
    padding: 20px 14px;
  }
  .calc-header-title {
    font-size: 1.5rem;
  }
  .calc-slider-badge {
    font-size: 0.9rem;
    padding: 4px 12px;
  }
  .calc-metric-val {
    font-size: 1.15rem;
  }
}