/* ==========================================================================
   HATI SOLUTIONS - TRANG LIÊN HỆ & BÁO GIÁ THIẾT BỊ AN NINH
   CSS Thuần Chuẩn Semantic, Tối Ưu Tương Phản & Responsive
   Tuân thủ nghiêm ngặt GEMINI.md:
   - Không dùng nền hồng/đỏ nhạt mờ nhạt (rgba(211, 47, 47, 0.12)).
   - Thẻ trắng (#FFFFFF) sắc nét, viền thanh mảnh (#E2E8F0), chữ đơn sắc (#0F172A).
   - Hỗ trợ toàn diện Dark / Light Mode.
   ========================================================================== */

:root {
  --app-c-primary: #D32F2F;
  --app-c-primary-hover: #B71C1C;
  --app-c-primary-dark: #9A0200;
  
  --app-c-bg: #F8FAFC;
  --app-c-card-bg: #FFFFFF;
  --app-c-card-border: #E2E8F0;
  --app-c-card-border-hover: #CBD5E1;
  --app-c-input-bg: #FFFFFF;
  --app-c-input-border: #CBD5E1;
  --app-c-input-focus-border: #0F172A;
  
  --app-c-text-heading: #0F172A;
  --app-c-text-body: #334155;
  --app-c-text-muted: #64748B;
  --app-c-text-subtle: #94A3B8;

  --app-c-chip-bg: #FFFFFF;
  --app-c-chip-border: #E2E8F0;
  --app-c-chip-checked-border: #D32F2F;
  
  --app-c-shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.04);
  --app-c-shadow-md: 0 8px 24px rgba(15, 23, 42, 0.06);
  --app-c-shadow-lg: 0 16px 40px rgba(15, 23, 42, 0.08);

  --app-c-radius-lg: 20px;
  --app-c-radius-md: 14px;
  --app-c-radius-sm: 10px;
  --app-c-radius-pill: 999px;
}

html[data-theme="dark"] {
  --app-c-primary: #EF4444;
  --app-c-primary-hover: #DC2626;
  --app-c-primary-dark: #B91C1C;

  --app-c-bg: #0B0F19;
  --app-c-card-bg: #131B2E;
  --app-c-card-border: #1E293B;
  --app-c-card-border-hover: #334155;
  --app-c-input-bg: #0B0F19;
  --app-c-input-border: #1E293B;
  --app-c-input-focus-border: #EF4444;

  --app-c-text-heading: #F8FAFC;
  --app-c-text-body: #CBD5E1;
  --app-c-text-muted: #94A3B8;
  --app-c-text-subtle: #64748B;

  --app-c-chip-bg: #0F172A;
  --app-c-chip-border: #1E293B;
  --app-c-chip-checked-border: #EF4444;

  --app-c-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.25);
  --app-c-shadow-md: 0 8px 24px rgba(0, 0, 0, 0.35);
  --app-c-shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.45);
}

/* ================= 1. PAGE SHELL & HERO SECTION ================= */
.app-contact-page {
  padding-top: 100px;
  padding-bottom: 70px;
  background-color: var(--app-c-bg);
  min-height: 100vh;
  transition: background-color 0.3s ease;
}

.app-contact-hero {
  padding: 10px 0 35px;
}

.app-contact-hero-inner {
  max-width: 840px;
  margin: 0 auto;
  text-align: center;
}

/* Breadcrumb */
.app-contact-breadcrumb {
  margin-bottom: 16px;
}

.app-contact-breadcrumb-list {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  list-style: none;
  padding: 0;
  margin: 0;
  font-size: 0.86rem;
  color: var(--app-c-text-muted);
}

.app-contact-breadcrumb-link {
  color: var(--app-c-text-muted);
  text-decoration: none;
  transition: color 0.2s ease;
}

.app-contact-breadcrumb-link:hover {
  color: var(--app-c-primary);
}

.app-contact-breadcrumb-sep {
  color: var(--app-c-text-subtle);
  font-weight: 300;
}

.app-contact-breadcrumb-active {
  color: var(--app-c-text-heading);
  font-weight: 600;
}

/* Tag Pill: Solid White Background, Clear Monochrome Text */
.app-contact-pill-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background-color: var(--app-c-card-bg);
  border: 1px solid var(--app-c-card-border);
  border-radius: var(--app-c-radius-pill);
  box-shadow: var(--app-c-shadow-sm);
  margin-bottom: 18px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.app-contact-pill-tag:hover {
  transform: translateY(-2px);
  box-shadow: var(--app-c-shadow-md);
}

.app-contact-pill-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--app-c-primary);
  flex-shrink: 0;
}

.app-contact-pill-label {
  font-family: var(--font-heading, "Montserrat", sans-serif);
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--app-c-text-heading);
}

/* H1 Title */
.app-contact-title {
  font-family: var(--font-heading, "Montserrat", sans-serif);
  font-size: clamp(1.45rem, 3.2vw, 2.45rem);
  font-weight: 800;
  color: var(--app-c-text-heading);
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin: 0 0 16px;
}

.app-title-brand {
  color: var(--app-c-primary);
  font-weight: 800;
}

.app-contact-desc {
  font-size: 1.02rem;
  color: var(--app-c-text-muted);
  line-height: 1.68;
  max-width: 660px;
  margin: 0 auto;
  text-wrap: balance;
}

.app-contact-main-section {
  margin-bottom: 45px;
}

.app-contact-layout-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  align-items: stretch;
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
}

@media (min-width: 992px) {
  .app-contact-layout-grid {
    grid-template-columns: 460px minmax(0, 1fr);
    gap: 32px;
    align-items: stretch;
  }
}

@media (min-width: 1200px) {
  .app-contact-layout-grid {
    grid-template-columns: 480px minmax(0, 1fr);
    gap: 36px;
    align-items: stretch;
  }
}

.app-contact-info-col,
.app-contact-form-col {
  display: flex;
  flex-direction: column;
  height: 100%;
  width: 100%;
  max-width: 100%;
  min-width: 0;
  box-sizing: border-box;
}

.app-contact-panel {
  background-color: var(--app-c-card-bg);
  border: 1px solid var(--app-c-card-border);
  border-radius: var(--app-c-radius-lg);
  box-shadow: var(--app-c-shadow-md);
  padding: 28px 24px;
  transition: box-shadow 0.3s ease, border-color 0.3s ease;
  display: flex;
  flex-direction: column;
  height: 100%;
  flex: 1;
  width: 100%;
  max-width: 100%;
  min-width: 0;
  box-sizing: border-box;
}

.app-contact-panel-info {
  justify-content: space-between;
  gap: 20px;
}

@media (min-width: 768px) {
  .app-contact-panel {
    padding: 34px 30px;
  }
}

/* Panel Header */
.app-contact-panel-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--app-c-card-border);
}

.app-contact-panel-header-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background-color: var(--app-c-bg);
  border: 1px solid var(--app-c-card-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--app-c-primary);
  flex-shrink: 0;
}

.app-contact-panel-header-text {
  flex: 1;
}

/* H2 Title #1 */
.app-contact-panel-h2 {
  font-family: var(--font-heading, "Montserrat", sans-serif);
  font-size: 1.22rem;
  font-weight: 800;
  color: var(--app-c-text-heading);
  line-height: 1.35;
  margin: 0;
}

/* ================= 3. CỘT TRÁI: CHI NHÁNH & LIÊN HỆ ================= */
.app-contact-branch-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 20px;
}

.app-contact-branch-card {
  background-color: var(--app-c-bg);
  border: 1px solid var(--app-c-card-border);
  border-radius: var(--app-c-radius-md);
  padding: 18px 20px;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.app-contact-branch-card:hover {
  border-color: var(--app-c-card-border-hover);
  box-shadow: var(--app-c-shadow-sm);
  transform: translateY(-2px);
}

.app-contact-branch-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

.app-contact-branch-badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  background-color: var(--app-c-text-heading);
  color: #FFFFFF;
  border-radius: 6px;
  flex-shrink: 0;
}

.app-contact-badge-secondary {
  background-color: var(--app-c-primary);
}

/* H3 Titles #1 & #2 */
.app-contact-card-h3 {
  font-family: var(--font-heading, "Montserrat", sans-serif);
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--app-c-text-heading);
  line-height: 1.35;
  margin: 0;
}

.app-contact-branch-body {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 16px;
}

.app-contact-branch-row {
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.app-contact-branch-icon {
  color: var(--app-c-primary);
  flex-shrink: 0;
  margin-top: 2px;
}

.app-contact-branch-detail {
  display: flex;
  flex-direction: column;
  gap: 2px;
  font-size: 0.88rem;
}

.app-contact-detail-label {
  font-size: 0.76rem;
  color: var(--app-c-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.3px;
  font-weight: 600;
}

.app-contact-address-link,
.app-contact-phone-link {
  color: var(--app-c-text-heading);
  text-decoration: none;
  line-height: 1.45;
  transition: color 0.2s ease;
}

.app-contact-address-link:hover,
.app-contact-phone-link:hover {
  color: var(--app-c-primary);
}

.app-contact-phone-link strong {
  font-family: var(--font-heading, "Montserrat", sans-serif);
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: 0.5px;
}

.app-contact-branch-footer {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  padding-top: 14px;
  border-top: 1px dashed var(--app-c-card-border);
}

.app-contact-branch-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 10px;
  border-radius: var(--app-c-radius-sm);
  font-family: var(--font-heading, "Montserrat", sans-serif);
  font-size: 0.8rem;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
  transition: all 0.2s ease;
  text-align: center;
  cursor: pointer;
  border: none;
  outline: none;
}

.app-contact-branch-btn-call {
  background-color: var(--app-c-text-heading);
  color: #FFFFFF;
}

.app-contact-branch-btn-call:hover {
  background-color: var(--app-c-primary);
  color: #FFFFFF;
}

.app-contact-branch-btn-map {
  background-color: var(--app-c-card-bg);
  color: var(--app-c-text-heading);
  border: 1px solid var(--app-c-card-border);
}

.app-contact-branch-btn-map:hover {
  background-color: var(--app-c-bg);
  border-color: var(--app-c-text-heading);
}

/* H3 Title #3: Đường Dây Nóng (3 Hàng Riêng Biệt) */
.app-contact-hotline-card {
  background-color: var(--app-c-bg);
  border: 1px solid var(--app-c-card-border);
  border-radius: var(--app-c-radius-md);
  padding: 18px 20px;
  margin-bottom: 20px;
}

.app-contact-hotline-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
}

.app-contact-hotline-header-icon {
  color: var(--app-c-primary);
  flex-shrink: 0;
}

.app-contact-hotline-h3 {
  font-family: var(--font-heading, "Montserrat", sans-serif);
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--app-c-text-heading);
  line-height: 1.35;
  margin: 0;
}

.app-contact-hotlines-grid {
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.app-contact-hotline-row-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background-color: var(--app-c-card-bg);
  border: 1px solid var(--app-c-card-border);
  border-radius: var(--app-c-radius-sm);
  text-decoration: none;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.app-contact-hotline-row-item:hover {
  transform: translateX(3px);
  border-color: var(--app-c-primary);
  box-shadow: var(--app-c-shadow-sm);
}

.app-hotline-row-left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.app-hotline-row-icon {
  color: var(--app-c-primary);
  display: flex;
  align-items: center;
}

.app-contact-hotline-tag {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--app-c-text-body);
}

.app-contact-hotline-number {
  font-family: var(--font-heading, "Montserrat", sans-serif);
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--app-c-text-heading);
  letter-spacing: 0.3px;
}

.app-contact-hotline-row-item:hover .app-contact-hotline-number {
  color: var(--app-c-primary);
}

.app-contact-hotline-pill {
  display: flex;
  flex-direction: column;
  padding: 10px 12px;
  background-color: var(--app-c-card-bg);
  border: 1px solid var(--app-c-card-border);
  border-radius: var(--app-c-radius-sm);
  text-decoration: none;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.app-contact-hotline-pill:hover {
  transform: translateY(-2px);
  border-color: var(--app-c-primary);
  box-shadow: var(--app-c-shadow-sm);
}

.app-contact-hotline-tag {
  font-size: 0.72rem;
  color: var(--app-c-text-muted);
  margin-bottom: 4px;
}

.app-contact-hotline-number {
  font-family: var(--font-heading, "Montserrat", sans-serif);
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--app-c-text-heading);
  letter-spacing: 0.3px;
}

.app-contact-hotline-pill:hover .app-contact-hotline-number {
  color: var(--app-c-primary);
}

/* Meta Card: Giờ làm việc & Email */
.app-contact-meta-card {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  background-color: var(--app-c-card-bg);
  border: 1px solid var(--app-c-card-border);
  border-radius: var(--app-c-radius-md);
  padding: 18px 20px;
  margin-bottom: 20px;
}

.app-contact-meta-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.app-contact-meta-icon {
  color: var(--app-c-primary);
  flex-shrink: 0;
  margin-top: 2px;
}

.app-contact-meta-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
  font-size: 0.88rem;
}

.app-contact-meta-label {
  font-size: 0.75rem;
  color: var(--app-c-text-muted);
  text-transform: uppercase;
  font-weight: 600;
}

.app-contact-meta-val {
  color: var(--app-c-text-heading);
  font-weight: 700;
}

.app-contact-meta-note {
  font-size: 0.76rem;
  color: var(--app-c-text-muted);
}

.app-contact-email-link {
  color: var(--app-c-text-heading);
  text-decoration: none;
  font-size: 0.92rem;
  transition: color 0.2s ease;
}

.app-contact-email-link:hover {
  color: var(--app-c-primary);
}

/* 3 Cam kết chất lượng dịch vụ */
.app-contact-commit-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-bottom: 22px;
}

@media (min-width: 576px) {
  .app-contact-commit-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.app-contact-commit-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px 12px;
  background-color: var(--app-c-card-bg);
  border: 1px solid var(--app-c-card-border);
  border-radius: var(--app-c-radius-sm);
  text-align: center;
  align-items: center;
}

.app-contact-commit-icon {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background-color: var(--app-c-bg);
  border: 1px solid var(--app-c-card-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--app-c-primary);
}

.app-contact-commit-title {
  font-family: var(--font-heading, "Montserrat", sans-serif);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--app-c-text-heading);
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.app-contact-commit-desc {
  font-size: 0.76rem;
  color: var(--app-c-text-muted);
  line-height: 1.4;
}

.app-contact-quick-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  width: 100%;
}

.app-contact-btn-direct-call,
.app-contact-btn-direct-zalo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 11px 12px;
  border-radius: var(--app-c-radius-sm);
  font-family: var(--font-heading, "Montserrat", sans-serif);
  font-size: 0.86rem;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
  min-width: 0;
  transition: all 0.25s ease;
}

.app-contact-btn-direct-call svg,
.app-contact-btn-direct-zalo svg {
  flex-shrink: 0;
}

.app-contact-btn-direct-call {
  background-color: var(--app-c-primary);
  color: #FFFFFF;
  box-shadow: 0 4px 14px rgba(211, 47, 47, 0.25);
}

.app-contact-btn-direct-call:hover {
  background-color: var(--app-c-primary-hover);
  color: #FFFFFF;
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(211, 47, 47, 0.35);
}

.app-contact-btn-direct-zalo {
  background-color: var(--app-c-card-bg);
  color: var(--app-c-text-heading);
  border: 1px solid var(--app-c-card-border);
}

.app-contact-btn-direct-zalo:hover {
  border-color: #0068FF;
  color: #0068FF;
  transform: translateY(-2px);
  box-shadow: var(--app-c-shadow-sm);
}

/* ================= 4. CỘT PHẢI: FORM ĐĂNG KÝ BÁO GIÁ ================= */
.app-contact-form-header {
  margin-bottom: 26px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--app-c-card-border);
}

.app-contact-form-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background-color: var(--app-c-bg);
  border: 1px solid var(--app-c-card-border);
  border-radius: var(--app-c-radius-pill);
  font-size: 0.76rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--app-c-primary);
  letter-spacing: 0.4px;
  margin-bottom: 12px;
}

/* H2 Title #2 */
.app-contact-form-h2 {
  font-family: var(--font-heading, "Montserrat", sans-serif);
  font-size: clamp(1.28rem, 2.2vw, 1.6rem);
  font-weight: 800;
  color: var(--app-c-text-heading);
  line-height: 1.3;
  margin: 0 0 8px;
}

.app-contact-form-sub {
  font-size: 0.92rem;
  color: var(--app-c-text-muted);
  line-height: 1.6;
  margin: 0;
}

/* Form Sections */
.app-form-section {
  margin-bottom: 26px;
}

.app-form-section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}

.app-form-section-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-heading, "Montserrat", sans-serif);
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--app-c-text-heading);
  margin: 0;
}

.app-form-step-num {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background-color: var(--app-c-text-heading);
  color: #FFFFFF;
  font-size: 0.74rem;
  font-weight: 800;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.app-form-toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--app-c-bg);
  border: 1px solid var(--app-c-card-border);
  padding: 5px 12px;
  border-radius: var(--app-c-radius-pill);
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--app-c-text-muted);
  cursor: pointer;
  transition: all 0.2s ease;
}

.app-form-toggle-btn:hover,
.app-form-toggle-btn.app-form-toggle-active {
  background-color: var(--app-c-text-heading);
  color: #FFFFFF;
  border-color: var(--app-c-text-heading);
}

/* 1. Service Chips Grid */
.app-service-chips-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

@media (min-width: 640px) {
  .app-service-chips-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.app-service-chip {
  position: relative;
  cursor: pointer;
  user-select: none;
  display: block;
}

.app-service-input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}

.app-service-chip-box {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  background-color: var(--app-c-card-bg);
  border: 1px solid var(--app-c-card-border);
  border-radius: var(--app-c-radius-md);
  transition: all 0.22s ease;
}

.app-service-chip:hover .app-service-chip-box {
  border-color: var(--app-c-card-border-hover);
  box-shadow: var(--app-c-shadow-sm);
  transform: translateY(-1px);
}

.app-service-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background-color: var(--app-c-bg);
  border: 1px solid var(--app-c-card-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--app-c-text-muted);
  flex-shrink: 0;
  transition: all 0.2s ease;
}

.app-service-text-group {
  display: flex;
  flex-direction: column;
  gap: 3px;
  flex: 1;
  min-width: 0;
  overflow: hidden;
}

.app-service-name {
  font-family: var(--font-heading, "Montserrat", sans-serif);
  font-size: 0.86rem;
  font-weight: 700;
  color: var(--app-c-text-heading);
  line-height: 1.35;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  display: block;
}

.app-service-meta {
  font-size: 0.75rem;
  color: var(--app-c-text-muted);
  line-height: 1.35;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  display: block;
}

/* Checked Service Chip State: Solid Red Border, Accent Icon, Clean White Bg */
.app-service-input:checked + .app-service-chip-box {
  border-color: var(--app-c-primary);
  box-shadow: 0 4px 14px rgba(211, 47, 47, 0.12);
}

.app-service-input:checked + .app-service-chip-box .app-service-icon {
  background-color: var(--app-c-primary);
  border-color: var(--app-c-primary);
  color: #FFFFFF;
}

.app-service-input:checked + .app-service-chip-box .app-service-name {
  color: var(--app-c-primary);
}

/* 2. Scale Chips Row */
.app-scale-chips-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}

.app-scale-chip {
  cursor: pointer;
  user-select: none;
}

.app-scale-input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}

.app-scale-box {
  display: inline-block;
  padding: 8px 16px;
  background-color: var(--app-c-card-bg);
  border: 1px solid var(--app-c-card-border);
  border-radius: var(--app-c-radius-pill);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--app-c-text-body);
  transition: all 0.2s ease;
}

.app-scale-chip:hover .app-scale-box {
  border-color: var(--app-c-card-border-hover);
  color: var(--app-c-text-heading);
}

.app-scale-input:checked + .app-scale-box {
  background-color: var(--app-c-text-heading);
  border-color: var(--app-c-text-heading);
  color: #FFFFFF;
  font-weight: 700;
  box-shadow: var(--app-c-shadow-sm);
}

/* 3. Form Input Fields */
.app-form-fields-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 12px;
}

@media (min-width: 640px) {
  .app-form-fields-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.app-form-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.app-form-field-full {
  margin-top: 14px;
}

.app-form-input-label {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--app-c-text-heading);
}

.app-required {
  color: var(--app-c-primary);
}

.app-form-input-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.app-form-input-icon {
  position: absolute;
  left: 14px;
  color: var(--app-c-text-muted);
  pointer-events: none;
  display: flex;
  align-items: center;
  justify-content: center;
}

.app-form-control {
  width: 100%;
  height: 48px;
  padding: 10px 14px 10px 42px;
  background-color: var(--app-c-input-bg);
  border: 1px solid var(--app-c-input-border);
  border-radius: var(--app-c-radius-sm);
  font-size: 0.92rem;
  color: var(--app-c-text-heading);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  outline: none;
}

.app-form-control::placeholder {
  color: var(--app-c-text-subtle);
  font-size: 0.86rem;
}

.app-form-control:focus {
  border-color: var(--app-c-input-focus-border);
  box-shadow: 0 0 0 3px rgba(15, 23, 42, 0.08);
}

.app-form-textarea {
  height: auto;
  min-height: 96px;
  padding: 12px 14px;
  resize: vertical;
  line-height: 1.5;
}

.app-form-textarea:focus {
  border-color: var(--app-c-input-focus-border);
  box-shadow: 0 0 0 3px rgba(15, 23, 42, 0.08);
}

/* Alert Notification */
.app-contact-alert {
  display: none;
  padding: 14px 18px;
  border-radius: var(--app-c-radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  line-height: 1.5;
  margin-bottom: 20px;
}

.app-contact-alert.app-alert-show {
  display: block;
}

.app-contact-alert-success {
  background-color: #ECFDF5;
  border: 1px solid #A7F3D0;
  color: #065F46;
}

.app-contact-alert-error {
  background-color: #FEF2F2;
  border: 1px solid #FECACA;
  color: #991B1B;
}

/* Submit Action Button & Note */
.app-form-footer {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding-top: 10px;
}

.app-form-submit-btn {
  width: 100%;
  height: 52px;
  background-color: var(--app-c-primary);
  color: #FFFFFF;
  border: none;
  border-radius: var(--app-c-radius-sm);
  font-family: var(--font-heading, "Montserrat", sans-serif);
  font-size: 0.96rem;
  font-weight: 800;
  letter-spacing: 0.3px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  box-shadow: 0 4px 16px rgba(211, 47, 47, 0.28);
  transition: all 0.25s ease;
}

.app-form-submit-btn:hover:not(:disabled) {
  background-color: var(--app-c-primary-hover);
  box-shadow: 0 8px 24px rgba(211, 47, 47, 0.38);
  transform: translateY(-2px);
}

.app-form-submit-btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

/* Loading spinner */
.app-submit-btn-spinner {
  display: none;
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: #FFFFFF;
  border-radius: 50%;
  animation: hatiSpin 0.75s linear infinite;
}

.app-btn-loading .app-submit-btn-spinner {
  display: inline-block;
}

.app-btn-loading .app-submit-btn-icon {
  display: none;
}

@keyframes hatiSpin {
  to { transform: rotate(360deg); }
}

.app-form-nda-note {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.8rem;
  color: var(--app-c-text-muted);
  text-align: center;
}

.app-nda-icon {
  color: var(--app-c-primary);
  flex-shrink: 0;
}

/* ================= 5. BẢN ĐỒ GOOGLE MAPS SECTION ================= */
.app-contact-map-section {
  margin-top: 10px;
}

.app-contact-map-panel {
  background-color: var(--app-c-card-bg);
  border: 1px solid var(--app-c-card-border);
  border-radius: var(--app-c-radius-lg);
  box-shadow: var(--app-c-shadow-md);
  padding: 28px 24px;
}

@media (min-width: 768px) {
  .app-contact-map-panel {
    padding: 34px 32px;
  }
}

.app-contact-map-header {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin-bottom: 22px;
}

@media (min-width: 768px) {
  .app-contact-map-header {
    flex-direction: row;
    align-items: flex-end;
    justify-content: space-between;
  }
}

.app-contact-map-header-left {
  max-width: 640px;
}

.app-contact-map-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 14px;
  background-color: var(--app-c-bg);
  border: 1px solid var(--app-c-card-border);
  border-radius: var(--app-c-radius-pill);
  font-size: 0.74rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--app-c-primary);
  margin-bottom: 10px;
}

/* H3 Title #4 */
.app-contact-map-h3 {
  font-family: var(--font-heading, "Montserrat", sans-serif);
  font-size: clamp(1.2rem, 2vw, 1.45rem);
  font-weight: 800;
  color: var(--app-c-text-heading);
  line-height: 1.35;
  margin: 0 0 6px;
}

.app-contact-map-desc {
  font-size: 0.88rem;
  color: var(--app-c-text-muted);
  line-height: 1.55;
  margin: 0;
}

.app-contact-map-switcher {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background-color: var(--app-c-bg);
  padding: 4px;
  border-radius: 12px;
  border: 1px solid var(--app-c-card-border);
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.04);
}

.app-map-tab-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 16px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 8px;
  font-family: var(--font-heading, "Montserrat", sans-serif);
  font-size: 0.84rem;
  font-weight: 700;
  color: var(--app-c-text-muted);
  white-space: nowrap;
  cursor: pointer;
  transition: all 0.22s cubic-bezier(0.4, 0, 0.2, 1);
}

.app-map-tab-btn:hover {
  color: var(--app-c-text-heading);
  background-color: rgba(15, 23, 42, 0.03);
}

.app-map-tab-btn.app-map-tab-active {
  background-color: var(--app-c-card-bg);
  color: var(--app-c-primary);
  border-color: var(--app-c-card-border);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
}

.app-map-tab-icon {
  width: 16px;
  height: 16px;
  display: inline-block;
  vertical-align: middle;
  color: var(--app-c-text-subtle);
  stroke: currentColor;
  fill: none;
  flex-shrink: 0;
  transition: color 0.2s ease;
}

.app-map-tab-btn:hover .app-map-tab-icon {
  color: var(--app-c-text-heading);
}

.app-map-tab-btn.app-map-tab-active .app-map-tab-icon {
  color: var(--app-c-primary);
}

/* Map Wrapper & Viewports */
.app-contact-map-wrapper {
  position: relative;
  width: 100%;
  border-radius: var(--app-c-radius-md);
  overflow: hidden;
  border: 1px solid var(--app-c-card-border);
}

.app-map-viewport {
  display: none;
  position: relative;
  width: 100%;
  height: 420px;
}

.app-map-viewport-active {
  display: block;
}

.app-map-iframe {
  width: 100%;
  height: 100%;
  border: none;
  display: block;
}

/* Floating info card on map bottom */
.app-map-floating-card {
  position: absolute;
  bottom: 16px;
  left: 16px;
  right: 16px;
  background-color: var(--app-c-card-bg);
  border: 1px solid var(--app-c-card-border);
  border-radius: var(--app-c-radius-md);
  box-shadow: var(--app-c-shadow-lg);
  padding: 14px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

@media (min-width: 640px) {
  .app-map-floating-card {
    right: auto;
    max-width: 440px;
  }
}

.app-map-floating-info {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}

.app-map-floating-name {
  font-family: var(--font-heading, "Montserrat", sans-serif);
  font-size: 0.88rem;
  font-weight: 800;
  color: var(--app-c-text-heading);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.app-map-floating-addr {
  font-size: 0.78rem;
  color: var(--app-c-text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.app-map-floating-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  background-color: var(--app-c-primary);
  color: #FFFFFF;
  border-radius: var(--app-c-radius-sm);
  font-family: var(--font-heading, "Montserrat", sans-serif);
  font-size: 0.78rem;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
  flex-shrink: 0;
  transition: all 0.2s ease;
}

.app-map-floating-btn:hover {
  background-color: var(--app-c-primary-hover);
  color: #FFFFFF;
  transform: translateY(-1px);
}

@media (max-width: 768px) {
  .app-contact-page {
    padding-top: 24px;
    padding-bottom: 40px;
    overflow-x: hidden;
  }

  .app-contact-hero {
    padding: 10px 0 24px;
  }

  .app-contact-main-section,
  .app-contact-map-section {
    margin-bottom: 30px;
    padding-left: 14px;
    padding-right: 14px;
  }

  .app-contact-layout-grid {
    gap: 20px;
  }

  .app-contact-panel {
    padding: 16px 14px;
    border-radius: var(--app-c-radius-md);
  }

  .app-contact-panel-header {
    gap: 12px;
    margin-bottom: 16px;
    padding-bottom: 14px;
  }

  .app-contact-panel-header-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
  }

  .app-contact-panel-h2 {
    font-size: 1.1rem;
  }

  .app-contact-branch-list {
    gap: 12px;
    margin-bottom: 16px;
  }

  .app-contact-branch-card,
  .app-contact-hotline-card,
  .app-contact-meta-card {
    padding: 14px 12px;
    border-radius: var(--app-c-radius-sm);
  }

  .app-contact-branch-footer {
    gap: 8px;
    padding-top: 10px;
  }

  .app-contact-branch-btn {
    padding: 7px 8px;
    font-size: 0.78rem;
    min-width: 0;
  }

  .app-contact-hotline-row-item {
    padding: 9px 10px;
    gap: 6px;
    min-width: 0;
  }

  .app-hotline-row-left {
    gap: 6px;
    min-width: 0;
  }

  .app-contact-hotline-tag {
    font-size: 0.78rem;
  }

  .app-contact-hotline-number {
    font-size: 0.88rem;
    flex-shrink: 0;
  }

  .app-contact-commit-grid {
    gap: 10px;
    margin-bottom: 16px;
  }

  .app-contact-quick-actions {
    gap: 8px;
    width: 100%;
  }

  .app-contact-btn-direct-call,
  .app-contact-btn-direct-zalo {
    padding: 10px 8px;
    font-size: 0.82rem;
    gap: 6px;
    white-space: nowrap;
    min-width: 0;
  }

  .app-contact-title {
    font-size: 1.35rem;
    line-height: 1.3;
    margin-bottom: 10px;
  }

  .app-contact-desc {
    font-size: 0.88rem;
    line-height: 1.55;
  }

  .app-contact-panel-h2 {
    font-size: 1.05rem;
    line-height: 1.35;
  }

  .app-contact-card-h3 {
    font-size: 0.92rem;
    line-height: 1.35;
  }

  .app-contact-form-header {
    margin-bottom: 18px;
    padding-bottom: 14px;
  }

  .app-contact-form-h2 {
    font-size: 1.08rem;
    line-height: 1.35;
  }

  .app-contact-form-sub {
    font-size: 0.84rem;
    line-height: 1.5;
  }

  .app-service-chips-grid {
    gap: 10px;
  }

  .app-service-chip-box {
    padding: 12px 12px;
    gap: 10px;
  }

  .app-form-control {
    height: 44px;
    padding: 8px 12px 8px 38px;
    font-size: 0.88rem;
  }

  .app-form-input-icon {
    left: 12px;
  }

  .app-form-submit-btn {
    height: 48px;
    font-size: 0.95rem;
  }

  .app-contact-map-panel {
    padding: 18px 14px;
    border-radius: var(--app-c-radius-md);
  }

  .app-contact-map-header {
    gap: 14px;
    margin-bottom: 18px;
  }

  .app-contact-map-h3 {
    font-size: 1.05rem;
    line-height: 1.35;
  }

  .app-contact-map-desc {
    font-size: 0.84rem;
    line-height: 1.5;
  }

  .app-contact-map-switcher {
    width: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4px;
  }

  .app-map-tab-btn {
    width: 100%;
    padding: 9px 8px;
    font-size: 0.8rem;
    gap: 6px;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .app-contact-page {
    padding-top: 16px;
  }

  .app-contact-main-section,
  .app-contact-map-section {
    padding-left: 10px;
    padding-right: 10px;
  }

  .app-contact-panel {
    padding: 12px 10px;
  }

  .app-contact-panel-header {
    gap: 10px;
    margin-bottom: 12px;
    padding-bottom: 10px;
  }

  .app-contact-panel-header-icon {
    width: 36px;
    height: 36px;
    border-radius: 8px;
  }

  .app-contact-title {
    font-size: 1.18rem;
    line-height: 1.3;
    margin-bottom: 8px;
  }

  .app-contact-desc {
    font-size: 0.82rem;
    line-height: 1.48;
  }

  .app-contact-panel-h2 {
    font-size: 0.95rem;
    line-height: 1.35;
  }

  .app-contact-card-h3 {
    font-size: 0.84rem;
    line-height: 1.35;
  }

  .app-contact-form-h2 {
    font-size: 0.96rem;
    line-height: 1.35;
  }

  .app-contact-form-sub {
    font-size: 0.78rem;
    line-height: 1.45;
  }

  .app-contact-map-h3 {
    font-size: 0.94rem;
    line-height: 1.35;
  }

  .app-contact-map-desc {
    font-size: 0.78rem;
    line-height: 1.45;
  }

  .app-contact-branch-card,
  .app-contact-hotline-card,
  .app-contact-meta-card {
    padding: 10px 8px;
  }

  .app-contact-branch-footer {
    gap: 6px;
    padding-top: 8px;
  }

  .app-contact-branch-btn {
    font-size: 0.72rem;
    padding: 6px 4px;
    gap: 4px;
  }

  .app-contact-hotline-row-item {
    padding: 8px 8px;
    gap: 4px;
  }

  .app-contact-hotline-tag {
    font-size: 0.74rem;
  }

  .app-contact-hotline-number {
    font-size: 0.82rem;
  }

  .app-contact-quick-actions {
    gap: 6px;
  }

  .app-contact-btn-direct-call,
  .app-contact-btn-direct-zalo {
    padding: 9px 4px;
    font-size: 0.76rem;
    gap: 4px;
    white-space: nowrap;
  }

  .app-contact-btn-direct-call svg,
  .app-contact-btn-direct-zalo svg {
    width: 15px;
    height: 15px;
    flex-shrink: 0;
  }

  .app-service-chip-box {
    padding: 10px 10px;
    gap: 8px;
  }

  .app-scale-chips-row {
    gap: 6px;
  }

  .app-scale-box {
    padding: 6px 10px;
    font-size: 0.76rem;
  }

  .app-contact-map-panel {
    padding: 14px 10px;
  }

  .app-contact-map-switcher {
    padding: 3px;
    border-radius: 10px;
  }

  .app-map-tab-btn {
    padding: 8px 4px;
    font-size: 0.76rem;
    gap: 5px;
    border-radius: 7px;
  }

  .app-map-tab-icon {
    width: 14px;
    height: 14px;
  }
}