@import url('https://fonts.googleapis.com/css2?family=Be+Vietnam+Pro:ital,wght@0,400;0,500;0,600;0,700;1,400;1,500&family=Plus+Jakarta+Sans:ital,wght@0,500;0,600;0,700;0,800;1,600;1,700&display=swap');

/* ==========================================================================
   MINH ANH SKIN — VISUAL DNA v1.0 TYPOGRAPHY SYSTEM
   Source of Truth:
   - D:\MinhAnhSkin-AgentSystem\MINH_ANH_VISUAL_DNA_v1.md (Owner Decision 2026-09-19)
   - D:\MinhAnhSkin-AgentSystem\config\visual\visual-grammar.json
   - D:\MinhAnhSkin-AgentSystem\visual-intelligence\visual-dna.json
   ========================================================================== */
:root {
  /* Brand Fonts (Owner Decision 2026-09-19) */
  --display: 'Plus Jakarta Sans', sans-serif;
  --content: 'Be Vietnam Pro', sans-serif;
  --serif: var(--display);
  --sans: var(--content);

  /* Typography Scale (Owner-Approved: 18px body, 16px controls, 14px supporting) */
  --text-body: 1.125rem;   /* 18px */
  --text-ui: 1rem;         /* 16px */
  --text-small: 0.875rem;  /* 14px */

  /* Brand Color Palette */
  --black: #111111;
  --ink: #1c1c1c;
  --white: #ffffff;
  --off: #f4f4f4;
  --gray: #555555;
  --line: #e0e0e0;
  --gold: #ab8a55;
  --gold-text: #765c33;

  /* Container */
  --max-w: 1280px;
}

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

html {
  font-size: 100%; /* 16px root */
  scroll-behavior: smooth;
  scroll-padding-top: 6rem;
  scroll-padding-bottom: 8rem;
  background: var(--white);
  color: var(--ink);
}

body {
  font-family: var(--sans);
  font-size: var(--text-body);
  line-height: 1.7;
  color: var(--ink);
  background: var(--white);
  overflow-wrap: break-word;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

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

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 2rem;
}

.skip-link {
  position: absolute;
  top: -100px;
  left: 20px;
  background: var(--black);
  color: var(--white);
  padding: 10px 16px;
  z-index: 999;
  font-size: var(--text-small);
}
.skip-link:focus {
  top: 15px;
}

/* ==========================================================================
   HEADER (Quiet Editorial — No black banner on top)
   ========================================================================== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
  min-height: 4.75rem;
  display: flex;
  align-items: center;
}
.header-inner {
  max-width: 1360px;
  width: 100%;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
}
.brand-wrap {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.brand-logo-img {
  width: 44px;
  height: 44px;
  object-fit: contain;
  border-radius: 50%;
  background: rgba(171, 138, 85, 0.08);
  padding: 3px;
  border: 1px solid rgba(171, 138, 85, 0.25);
}
.brand-text {
  font-family: var(--serif);
  font-size: 1.5rem;
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: 0.05em;
  white-space: nowrap;
}
.brand-text span {
  color: var(--gold-text);
}
.brand-sub {
  display: block;
  font-family: var(--sans);
  font-size: var(--text-small);
  line-height: 1.6;
  letter-spacing: 0.13em;
  color: var(--gray);
  font-weight: 500;
  margin-top: 0.2rem;
}

.header nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(0.75rem, 1.25vw, 1.35rem);
  font-size: var(--text-ui);
  line-height: 1.5;
  flex: 1;
}
.header nav a {
  color: var(--ink);
  white-space: nowrap;
  transition: color 0.2s ease;
}
.header nav a:hover {
  color: var(--gold-text);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  background: var(--black);
  color: var(--white);
  padding: 0.875rem 1.5rem;
  font-size: var(--text-ui);
  line-height: 1.5;
  font-weight: 600;
  min-height: 3rem;
  border: 1px solid var(--black);
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}
.button:hover {
  background: #343029;
  border-color: #343029;
}
.button span {
  color: #d7bd90;
}
.button.small {
  font-size: var(--text-small);
  padding: 0.6rem 1.2rem;
  min-height: 2.75rem;
  white-space: nowrap;
  flex-shrink: 0;
}
.button-secondary {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
}
.button-secondary:hover {
  border-color: var(--gold);
  color: var(--gold-text);
  background: transparent;
}

/* ==========================================================================
   HEADINGS & TEXT (Exact Tokens from TYPOGRAPHY.md)
   ========================================================================== */
.eyebrow {
  display: inline-block;
  font-family: var(--sans);
  font-size: var(--text-small);
  line-height: 1.6;
  letter-spacing: 0.08em;
  font-weight: 700;
  color: var(--gold-text);
  text-transform: uppercase;
  margin-bottom: 1.25rem;
}

h1.hero-title {
  font-family: var(--display);
  font-size: clamp(2.25rem, 3.5vw, 3.5rem);
  line-height: 1.18;
  letter-spacing: -0.03em;
  font-weight: 700;
  margin-bottom: 1.25rem;
  color: var(--ink);
  max-width: 100%;
}
h1.hero-title em {
  display: inline;
  font-size: 1.02em;
  line-height: 1.15;
  letter-spacing: -0.02em;
  font-style: italic;
  color: var(--gold-text);
  font-weight: 600;
}
.nowrap {
  white-space: nowrap;
}

h2, .section-heading h2 {
  font-family: var(--display);
  font-size: clamp(2.125rem, 3.2vw, 3.125rem);
  line-height: 1.2;
  letter-spacing: -0.025em;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 1.25rem;
}
h2 em, .section-heading h2 em {
  font-style: italic;
  color: var(--gold-text);
  font-weight: 600;
}

h3 {
  font-family: var(--display);
  font-size: 1.5rem;
  line-height: 1.3;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 0.75rem;
}

.intro {
  font-family: var(--sans);
  font-size: var(--text-body);
  line-height: 1.7;
  max-width: 52ch;
  color: var(--gray);
  margin-bottom: 2rem;
}

.section-desc {
  font-family: var(--sans);
  font-size: var(--text-body);
  line-height: 1.7;
  max-width: 60ch;
  color: var(--gray);
  margin-bottom: 1rem;
}

.section {
  padding: 4.25rem 0;
  border-bottom: 1px solid var(--line);
}
.section.bg-off {
  background: var(--off);
}
.section-heading {
  margin-bottom: 3rem;
}

/* ==========================================================================
   HERO SECTION (Soft Two-Column Layout)
   ========================================================================== */
.hero {
  padding: 3rem 0 3.75rem;
  border-bottom: 1px solid var(--line);
  background: #faf8f5;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 2.75rem;
  align-items: center;
}
.hero-copy {
  max-width: 100%;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

/* Minimalist Scientific Diagram */
.diagram-card {
  background: var(--white);
  border: 1px solid var(--line);
  padding: 1.75rem 2rem;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
}
.diagram-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--text-small);
  line-height: 1.6;
  letter-spacing: 0.06em;
  color: var(--gray);
  padding-bottom: 0.75rem;
  margin-bottom: 1rem;
  border-bottom: 1px dashed var(--line);
  font-weight: 600;
}
.diagram-meta span:last-child {
  color: var(--gold-text);
}
.diagram-svg {
  width: 100%;
  height: auto;
  display: block;
}
.diagram-caption {
  font-size: var(--text-small);
  line-height: 1.55;
  color: var(--gray);
  margin-top: 1rem;
  padding-top: 0.875rem;
  border-top: 1px solid var(--line);
}
.diagram-caption strong {
  color: var(--ink);
}

/* ==========================================================================
   3 NGUYÊN TẮC CỐT LÕI (3 Balanced Cards)
   ========================================================================== */
.principles-wrap {
  padding: 3.5rem 0;
  border-bottom: 1px solid var(--line);
  background: var(--white);
}
.three-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}
.p-card {
  background: var(--off);
  border: 1px solid var(--line);
  padding: 2rem;
  border-top: 2px solid var(--gold);
}
.p-number {
  font-family: var(--serif);
  font-size: 1.5rem;
  line-height: 1;
  color: var(--gold-text);
  font-style: italic;
  margin-bottom: 0.75rem;
  display: block;
}
.p-card h3 {
  margin-bottom: 0.5rem;
}
.p-card p {
  font-size: var(--text-body);
  line-height: 1.7;
  color: var(--gray);
}

/* ==========================================================================
   MỤC 1: CƠ CHẾ SINH HỌC & VIDEO MINH HỌA 3D
   ========================================================================== */
.mechanism-layout {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 2.5rem;
  align-items: stretch;
}

.video-media-card {
  background: var(--white);
  border: 1px solid var(--line);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
}

.video-media-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--text-small);
  line-height: 1.6;
  letter-spacing: 0.06em;
  color: var(--gray);
  padding-bottom: 0.75rem;
  margin-bottom: 1rem;
  border-bottom: 1px dashed var(--line);
  font-weight: 600;
}

.video-media-meta span:last-child {
  color: var(--gold-text);
}

.video-container {
  width: 100%;
  border-radius: 2px;
  overflow: hidden;
  background: #111;
  aspect-ratio: 4 / 5;
  display: flex;
  align-items: center;
  justify-content: center;
}

.video-container video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.video-caption {
  font-size: var(--text-small);
  line-height: 1.55;
  color: var(--gray);
  margin-top: 1rem;
  padding-top: 0.875rem;
  border-top: 1px solid var(--line);
}

.video-caption strong {
  color: var(--ink);
}

.video-caption em {
  color: var(--gold-text);
  font-style: normal;
  font-weight: 600;
}

.mechanism-features {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  justify-content: space-between;
}

.mechanism-item {
  background: var(--white);
  border: 1px solid var(--line);
  padding: 1.75rem 2rem;
  flex: 1;
}

.mechanism-item h3 {
  margin-bottom: 0.5rem;
}

.mechanism-item p {
  font-size: var(--text-body);
  line-height: 1.7;
  color: var(--gray);
}

/* ==========================================================================
   MỤC 2, 3: CARDS & STRUCTURE
   ========================================================================== */
.feature-card {
  background: var(--white);
  border: 1px solid var(--line);
  padding: 2.25rem 2rem;
}
.feature-card h3 {
  margin-bottom: 0.6rem;
}
.feature-card p {
  font-size: var(--text-body);
  line-height: 1.7;
  color: var(--gray);
}
.card-line {
  width: 28px;
  height: 2px;
  background: var(--gold);
  margin-bottom: 1.25rem;
}

.depth-indicator {
  font-family: var(--serif);
  font-size: 2.5rem;
  line-height: 1.1;
  color: var(--gold-text);
  margin-bottom: 0.75rem;
}
.depth-indicator small {
  font-family: var(--sans);
  font-size: var(--text-small);
  color: var(--gray);
  margin-left: 0.25rem;
}

/* ==========================================================================
   MỤC: 5 HOẠT CHẤT PHỐI HỢP VI ĐIỂM
   ========================================================================== */
.actives-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}
.actives-grid-bottom {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  margin-top: 2rem;
}
.active-card {
  background: var(--white);
  border: 1px solid var(--line);
  padding: 2.25rem 2rem;
  display: flex;
  flex-direction: column;
}
.active-card .eyebrow {
  margin-bottom: 0.5rem;
}
.active-sub {
  font-family: var(--sans);
  font-size: var(--text-small);
  line-height: 1.5;
  color: var(--gold-text);
  font-weight: 600;
  margin-bottom: 1rem;
}
.active-card p {
  font-size: var(--text-body);
  line-height: 1.7;
  color: var(--gray);
  margin-bottom: 0.85rem;
}
.active-card p:last-child {
  margin-bottom: 0;
}
.active-card strong {
  color: var(--ink);
  font-weight: 600;
}
.clinical-note {
  margin-top: 2.5rem;
  background: var(--white);
  border: 1px solid var(--line);
  border-left: 3px solid var(--gold);
  padding: 1.5rem 2rem;
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
}
.clinical-note-icon {
  font-size: 1.35rem;
  color: var(--gold-text);
  line-height: 1.2;
}
.clinical-note p {
  font-size: var(--text-ui);
  line-height: 1.6;
  color: var(--gray);
  margin: 0;
}
.clinical-note strong {
  color: var(--ink);
}

/* ==========================================================================
   MỤC 4: TRƯỜNG HỢP NÊN TẠM HOÃN (Quiet Dark Stone Tone)
   ========================================================================== */
.defer-section {
  background: var(--black);
  color: #d7d4cf;
  border-bottom: 1px solid #222;
}
.defer-section h2 {
  color: var(--white);
}
.defer-section h2 em {
  color: #d7bd90;
}
.defer-section .section-desc {
  color: #a8a59e;
}
.defer-card {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.12);
  padding: 2.25rem 2rem;
}
.defer-card .defer-mark {
  font-size: 1.25rem;
  color: #d7bd90;
  margin-bottom: 0.75rem;
  display: block;
}
.defer-card h3 {
  color: var(--white);
  margin-bottom: 0.6rem;
}
.defer-card p {
  font-size: var(--text-body);
  line-height: 1.7;
  color: #bbb6ac;
}

/* ==========================================================================
   MỤC 5: CHĂM SÓC SAU CAN THIỆP (Timeline 4 Columns)
   ========================================================================== */
.timeline-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}
.timeline-card {
  background: var(--white);
  border: 1px solid var(--line);
  padding: 1.75rem 1.5rem;
  border-top: 3px solid var(--gold);
}
.timeline-step {
  font-family: var(--serif);
  font-size: 1.5rem;
  font-style: italic;
  color: var(--gold-text);
  margin-bottom: 0.5rem;
  display: block;
}
.timeline-card h3 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}
.timeline-card p {
  font-size: var(--text-body);
  line-height: 1.7;
  color: var(--gray);
}

/* ==========================================================================
   MỤC 6: FAQ ACCORDION
   ========================================================================== */
.faq-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 3.5rem;
  align-items: start;
}
details {
  border-bottom: 1px solid var(--line);
}
summary {
  cursor: pointer;
  list-style: none;
  position: relative;
  padding: 1.25rem 2rem 1.25rem 0;
  font-size: var(--text-body);
  line-height: 1.6;
  font-weight: 600;
  color: var(--ink);
}
summary::-webkit-details-marker {
  display: none;
}
summary::after {
  content: '+';
  position: absolute;
  right: 0;
  font-family: var(--serif);
  font-size: 1.5rem;
  color: var(--gold-text);
}
details[open] summary::after {
  content: '−';
}
details p {
  font-size: var(--text-body);
  line-height: 1.7;
  color: var(--gray);
  padding-right: 1.5rem;
  margin-bottom: 1.25rem;
}

/* ==========================================================================
   MỤC 7: CTA SECTION
   ========================================================================== */
.cta-section {
  background: var(--black);
  color: #d7d4cf;
  padding: 5.5rem 0;
}
.cta-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}
.cta-info h2 {
  color: var(--white);
  font-size: clamp(2.25rem, 3.7vw, 3.25rem);
}
.cta-info h2 em {
  color: #d7bd90;
}
.cta-info p {
  font-size: var(--text-body);
  line-height: 1.7;
  color: #a8a59e;
  margin-bottom: 2rem;
  max-width: 50ch;
}
.contact-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 2.5rem;
}
.contact-item {
  font-size: var(--text-ui);
  line-height: 1.6;
  color: #f5f1eb;
}
.contact-item a {
  color: #d7bd90;
  text-decoration: underline;
}
.contact-item strong {
  color: #fff;
  font-size: 1.25rem;
}
.facility-address {
  font-style: normal;
  font-size: var(--text-ui);
  line-height: 1.7;
  color: #a8a59e;
  border-top: 1px solid #333;
  padding-top: 1.5rem;
}
.facility-address strong {
  color: var(--white);
  display: block;
}
.facility-address a {
  color: #d7bd90;
  display: inline-block;
  margin-top: 0.5rem;
  border-bottom: 1px solid #d7bd90;
}

.cta-form {
  background: var(--white);
  color: var(--ink);
  padding: 2.5rem;
  border: 1px solid var(--line);
}
.cta-form h3 {
  font-size: 1.875rem;
  margin-bottom: 0.5rem;
}
.form-desc {
  font-size: var(--text-small);
  line-height: 1.6;
  color: var(--gray);
  margin-bottom: 1.5rem;
}
.form-field {
  margin-bottom: 1.25rem;
}
.form-field label {
  display: block;
  font-size: var(--text-ui);
  font-weight: 600;
  line-height: 1.5;
  margin-bottom: 0.5rem;
  color: var(--ink);
}
.form-field select,
.form-field textarea {
  width: 100%;
  padding: 0.875rem 1rem;
  border: 1px solid var(--line);
  background: var(--off);
  color: var(--ink);
  font-size: var(--text-ui);
  line-height: 1.5;
  outline: none;
}
.form-field select:focus,
.form-field textarea:focus {
  border-color: var(--gold);
  background: var(--white);
}
.form-field textarea {
  resize: vertical;
  min-height: 5.5rem;
}
.form-privacy {
  font-size: var(--text-small);
  line-height: 1.6;
  color: var(--gray);
  margin-bottom: 1.5rem;
}
.cta-form .button {
  width: 100%;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.footer {
  padding: 3rem 0;
  border-top: 1px solid var(--line);
  background: var(--white);
  font-size: var(--text-small);
  line-height: 1.7;
  color: var(--gray);
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.footer-brand strong {
  color: var(--ink);
  display: block;
  font-size: var(--text-ui);
}
.footer-toplink {
  font-size: var(--text-ui);
  color: var(--gold-text);
  font-weight: 600;
}

/* Sticky Mobile Contact Bar */
.mobile-contact {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 99;
  background: rgba(255, 255, 255, 0.98);
  border-top: 1px solid var(--line);
  padding: 0.75rem 5% calc(0.75rem + env(safe-area-inset-bottom));
  gap: 0.75rem;
  box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.06);
}
.mobile-contact a {
  flex: 1;
  display: block;
  text-align: center;
  padding: 0.75rem;
  font-size: var(--text-ui);
  line-height: 1.5;
  font-weight: 600;
  border: 1px solid var(--black);
}
.mobile-contact a.call {
  background: transparent;
  color: var(--ink);
}
.mobile-contact a.zalo {
  background: var(--black);
  color: var(--white);
}

/* ==========================================================================
   RESPONSIVE BREAKPOINTS (According to Existing System: 1100px & 760px)
   ========================================================================== */
@media (max-width: 1100px) {
  .hero-grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 2.25rem;
  }
  .three-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  .timeline-grid {
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
  }
  .faq-grid,
  .cta-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .actives-grid,
  .actives-grid-bottom {
    grid-template-columns: 1fr;
    gap: 1.5rem;
    margin-top: 1.5rem;
  }
  .mechanism-layout {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

@media (max-width: 1320px) {
  .header {
    min-height: auto;
    padding: 0.75rem 0 0.5rem;
  }
  .header-inner {
    flex-wrap: wrap;
    gap: 0.75rem 1rem;
  }
  .header nav {
    order: 3;
    width: 100%;
    justify-content: flex-start;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    white-space: nowrap;
    gap: 0.5rem;
    padding: 0.35rem 0 0.2rem;
    scrollbar-width: none;
    -ms-overflow-style: none;
    border-top: 1px solid var(--line);
  }
  .header nav::-webkit-scrollbar {
    display: none;
  }
  .header nav a {
    font-size: var(--text-small);
    padding: 0.4rem 0.85rem;
    background: var(--off);
    border: 1px solid var(--line);
    border-radius: 999px;
    white-space: nowrap;
    flex-shrink: 0;
  }
  .header nav a:hover,
  .header nav a:active {
    background: var(--white);
    border-color: var(--gold);
    color: var(--gold-text);
  }
}

@media (max-width: 960px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
}

@media (max-width: 760px) {
  html {
    scroll-padding-top: 1.5rem;
  }
  .container {
    padding: 0 1.25rem;
  }
  .header {
    min-height: auto;
    padding: 0.6rem 0 0.4rem;
  }
  .header-inner {
    padding: 0 1rem;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem 0;
  }
  .brand-wrap {
    gap: 8px;
  }
  .brand-logo-img {
    width: 34px;
    height: 34px;
  }
  .brand-text {
    font-size: 1.15rem;
  }
  .brand-sub {
    font-size: 0.65rem;
    letter-spacing: 0.08em;
  }
  .header .button.small {
    padding: 0.45rem 0.85rem;
    font-size: 0.8125rem;
    min-height: 2.25rem;
  }
  .header nav {
    order: 3;
    width: 100%;
    flex-basis: 100%;
    display: flex;
    justify-content: flex-start;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    white-space: nowrap;
    gap: 0.5rem;
    padding: 0.45rem 0 0.2rem;
    border-top: 1px solid var(--line);
    margin-top: 0.45rem;
    scrollbar-width: none;
    -ms-overflow-style: none;
  }
  .header nav::-webkit-scrollbar {
    display: none;
  }
  .header nav a {
    font-size: var(--text-small);
    padding: 0.35rem 0.75rem;
    background: var(--off);
    border: 1px solid var(--line);
    border-radius: 999px;
    white-space: nowrap;
    flex-shrink: 0;
  }
  .section {
    padding: 3rem 0;
  }
  .hero {
    padding: 2rem 0 2.5rem;
  }
  .hero-actions {
    flex-direction: column;
  }
  .hero-actions .button {
    width: 100%;
  }
  .timeline-grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }
  .diagram-card {
    padding: 1.25rem 1rem;
  }
  .diagram-meta {
    font-size: 0.75rem;
    flex-wrap: wrap;
    gap: 0.5rem;
  }
  .cta-form {
    padding: 1.75rem 1.25rem;
  }
  .footer {
    padding-bottom: calc(5.5rem + env(safe-area-inset-bottom));
  }
  .mobile-contact {
    display: flex;
  }
}