:root {
  --ink: #172322;
  --muted: #6b7774;
  --paper: #f5f4ef;
  --soft: #e5ebe4;
  --line: #cbd4ce;
  --accent: #ef7658;
  --accent-dark: #d85c41;
  --white: #fffef9;
  --display: "Space Grotesk", sans-serif;
  --body: "DM Sans", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--body); line-height: 1.6; }
a { color: inherit; text-decoration: none; }
.page-shell { width: min(1180px, calc(100% - 64px)); margin: 0 auto; }

.site-header { display: flex; align-items: center; justify-content: space-between; padding: 28px 0; border-bottom: 1px solid var(--line); }
.brand { font: 700 1.5rem var(--display); letter-spacing: -.08em; }
.brand span { color: var(--accent); }
.main-nav { display: flex; gap: 34px; margin-left: 90px; color: var(--muted); font-size: .82rem; }
.main-nav a, .download-link, .text-link { transition: color .2s ease; }
.main-nav a:hover, .download-link:hover, .text-link:hover { color: var(--accent-dark); }
.download-link { font-size: .8rem; font-weight: 700; }
.download-link span, .button span { margin-left: 8px; font-size: 1.05rem; }

.hero { display: grid; grid-template-columns: 1.02fr .98fr; gap: 80px; min-height: 570px; align-items: center; padding: 72px 0 86px; }
.eyebrow, .section-label { color: var(--accent-dark); font-size: .72rem; font-weight: 700; letter-spacing: .13em; text-transform: uppercase; }
.eyebrow { margin: 0 0 22px; }
h1, h2, p { margin-top: 0; }
h1 { margin-bottom: 26px; font: 700 clamp(4.6rem, 10vw, 8.6rem)/.82 var(--display); letter-spacing: -.1em; }
h1 em { color: var(--accent); font-style: normal; }
.hero-description { max-width: 385px; color: var(--muted); font-size: 1.08rem; line-height: 1.65; }
.hero-actions { display: flex; align-items: center; gap: 28px; margin-top: 34px; }
.button { display: inline-flex; align-items: center; padding: 13px 20px; border-radius: 2px; font-size: .8rem; font-weight: 700; }
.button-primary { background: var(--ink); color: var(--white); transition: background .2s ease, transform .2s ease; }
.button-primary:hover { background: var(--accent-dark); transform: translateY(-2px); }
.text-link { border-bottom: 1px solid var(--ink); font-size: .8rem; font-weight: 700; padding-bottom: 4px; }

.hero-visual { position: relative; min-height: 400px; }
.portrait-frame { position: relative; width: min(360px, 78vw); height: 420px; margin: 0 auto; overflow: hidden; background: var(--soft); }
.portrait-shape { position: absolute; background: var(--accent); transform: rotate(-12deg); }
.portrait-shape-one { width: 180px; height: 310px; right: -22px; top: 52px; border-radius: 100px 100px 0 0; }
.portrait-shape-two { width: 260px; height: 90px; left: -55px; bottom: 30px; background: var(--ink); transform: rotate(8deg); }
.portrait-circle { position: absolute; width: 228px; height: 290px; top: 70px; left: 60px; border-radius: 48% 48% 40% 40%; background: #bdc9bf; mix-blend-mode: multiply; }
.portrait-initials { position: absolute; left: 50%; top: 47%; color: var(--ink); font: 700 5.5rem/.8 var(--display); letter-spacing: -.12em; transform: translate(-50%, -50%); }
.visual-caption { position: absolute; bottom: -18px; left: 0; margin: 0; color: var(--ink); font: 700 .76rem/1.5 var(--display); letter-spacing: .04em; text-transform: uppercase; }
.visual-caption span { color: var(--muted); font: 400 .76rem var(--body); text-transform: none; }

.content-grid { display: grid; grid-template-columns: 260px 1fr; gap: 88px; padding: 72px 0; border-top: 1px solid var(--line); }
.sidebar { padding-right: 12px; }
.side-section { padding: 0 0 42px; }
.side-section .section-label { margin-bottom: 20px; }
.contact-list { display: grid; gap: 17px; padding: 0; margin: 0; list-style: none; }
.contact-list li { display: grid; gap: 2px; font-size: .83rem; }
.contact-list span { color: var(--muted); font-size: .72rem; }
.contact-list a { font-weight: 600; word-break: break-word; }
.contact-list a:hover { color: var(--accent-dark); }
.skill-group { display: grid; gap: 8px; }
.skill-row { display: flex; justify-content: space-between; font-size: .76rem; }
.skill-row strong { color: var(--accent-dark); font-weight: 700; }
.skill-meter { height: 4px; margin-bottom: 8px; background: var(--line); }
.skill-meter span { display: block; height: 100%; background: var(--accent); }
.tag-list { display: flex; flex-wrap: wrap; gap: 8px; }
.tag-list span { padding: 6px 9px; border: 1px solid var(--line); color: var(--muted); font-size: .72rem; }

.content-section { margin-bottom: 82px; }
.section-heading { display: flex; align-items: center; gap: 22px; margin-bottom: 34px; }
.section-heading .section-label { flex: 0 0 auto; margin: 0; }
.heading-line { width: 100%; height: 1px; background: var(--line); }
.timeline { display: grid; gap: 32px; }
.timeline-item { display: grid; grid-template-columns: 112px 1fr; gap: 28px; }
.timeline-date { color: var(--muted); font-size: .75rem; padding-top: 4px; }
.timeline-body { border-left: 1px solid var(--accent); padding-left: 26px; }
.timeline-body h2, .project-card h2 { margin-bottom: 8px; font: 600 1.1rem var(--display); letter-spacing: -.03em; }
.timeline-body h2 span { color: var(--accent-dark); font: 500 .8rem var(--body); }
.timeline-body p, .project-card p { max-width: 500px; margin: 0; color: var(--muted); font-size: .86rem; }
.project-list { display: grid; gap: 12px; }
.project-card { display: grid; grid-template-columns: 60px 1fr 20px; align-items: center; gap: 18px; padding: 22px 20px; border: 1px solid var(--line); transition: background .2s ease, border-color .2s ease, transform .2s ease; }
.project-card:hover { border-color: var(--accent); background: var(--white); transform: translateX(5px); }
.project-card h2 { margin: 0 0 2px; }
.project-number { color: var(--accent-dark); font: 700 .76rem var(--display); }
.project-arrow { color: var(--accent-dark); font-size: 1.2rem; }
.quote-section { position: relative; max-width: 620px; padding: 48px 0 10px 44px; border-top: 2px solid var(--ink); }
.quote-mark { position: absolute; top: 33px; left: 0; color: var(--accent); font: 700 4.5rem/.8 Georgia, serif; }
blockquote { margin: 0; font: 500 clamp(1.55rem, 3vw, 2.35rem)/1.2 var(--display); letter-spacing: -.05em; }
.quote-author { margin: 20px 0 0; color: var(--muted); font-size: .78rem; }
.site-footer { display: flex; justify-content: space-between; padding: 22px 0 30px; border-top: 1px solid var(--line); color: var(--muted); font-size: .72rem; }
.site-footer p { margin: 0; }
.site-footer span { color: var(--accent); }

@media (max-width: 780px) {
  .page-shell { width: min(100% - 36px, 600px); }
  .site-header { padding: 21px 0; }
  .main-nav { display: none; }
  .hero { grid-template-columns: 1fr; gap: 54px; padding: 65px 0 80px; }
  h1 { font-size: clamp(4.7rem, 22vw, 7rem); }
  .hero-visual { min-height: 365px; }
  .portrait-frame { height: 365px; }
  .content-grid { grid-template-columns: 1fr; gap: 30px; padding: 56px 0; }
  .sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 26px; padding: 0; }
  .side-section { padding-bottom: 14px; }
  .side-section:last-child { grid-column: 1 / -1; }
  .timeline-item { grid-template-columns: 88px 1fr; gap: 15px; }
  .timeline-body { padding-left: 18px; }
  .content-section { margin-bottom: 64px; }
}

@media (max-width: 480px) {
  .download-link { font-size: 0; }
  .download-link::after { content: "Liên hệ ↗"; font-size: .8rem; }
  .hero { padding-top: 52px; }
  .hero-actions { align-items: flex-start; flex-direction: column; gap: 20px; }
  .sidebar { grid-template-columns: 1fr; gap: 0; }
  .side-section:last-child { grid-column: auto; }
  .timeline-item { grid-template-columns: 1fr; gap: 6px; }
  .timeline-body { padding-left: 16px; }
  .project-card { grid-template-columns: 38px 1fr 18px; gap: 10px; padding: 18px 14px; }
  .site-footer { align-items: flex-start; flex-direction: column; gap: 8px; }
}

@media print {
  body { background: #fff; }
  .page-shell { width: 100%; }
  .site-header, .hero-actions, .main-nav, .download-link { display: none; }
  .hero { min-height: auto; padding: 30px 0; }
  .content-grid { padding-top: 30px; }
  .button { color: var(--ink); }
}