/* ===================================================================
   PHÚC LONG GROUP — Stylesheet
   =================================================================== */

:root {
  --color-brown-950: #24140c;
  --color-brown-900: #3a2417;
  --color-brown-800: #4f3220;
  --color-brown-700: #6b4428;
  --color-orange-500: #e2711d;
  --color-orange-400: #f0924b;
  --color-orange-100: #fbe3c7;
  --color-green-700: #2e6b3e;
  --color-green-500: #3f9153;

  --color-bg: #ffffff;
  --color-bg-alt: #f4f6f9;
  --color-bg-dark: var(--color-brown-950);

  --color-text: #17212e;
  --color-text-muted: #5a6675;
  --color-text-invert: #f4f6f9;
  --color-border: #e3e7ee;

  --font-body: "Be Vietnam Pro", "Segoe UI", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-heading: "Be Vietnam Pro", "Segoe UI", -apple-system, BlinkMacSystemFont, sans-serif;

  --container-width: 1180px;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --shadow-sm: 0 2px 10px rgba(36, 20, 12, 0.06);
  --shadow-md: 0 10px 30px rgba(36, 20, 12, 0.10);
  --shadow-lg: 0 20px 50px rgba(36, 20, 12, 0.16);
  --transition: 0.25s ease;
}

/* ---------- Reset ---------- */
* , *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, h5 { font-family: var(--font-heading); margin: 0 0 .5em; font-weight: 700; line-height: 1.25; color: var(--color-brown-950); }
p { margin: 0 0 1em; }
button { font-family: inherit; cursor: pointer; }
input, textarea, select { font-family: inherit; font-size: 1rem; }

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

section { padding: 88px 0; }
@media (max-width: 768px) { section { padding: 56px 0; } }

.section-alt { background: var(--color-bg-alt); }
.section-dark {
  background: linear-gradient(155deg, var(--color-brown-950), var(--color-brown-900) 60%, var(--color-brown-800));
  color: var(--color-text-invert);
}
.section-dark h1, .section-dark h2, .section-dark h3 { color: #fff; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--color-orange-500);
  margin-bottom: 14px;
}
.eyebrow::before {
  content: "";
  width: 28px;
  height: 2px;
  background: var(--color-orange-500);
  display: inline-block;
}

.section-head { max-width: 720px; margin: 0 0 48px; }
.section-head.center { margin-inline: auto; text-align: center; }
.section-head p { color: var(--color-text-muted); font-size: 1.05rem; }

h1 { font-size: clamp(2.1rem, 4.2vw, 3.4rem); }
h2 { font-size: clamp(1.7rem, 3vw, 2.4rem); }
h3 { font-size: 1.25rem; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: .95rem;
  border: 1px solid transparent;
  transition: var(--transition);
  white-space: nowrap;
}
.btn-primary { background: var(--color-orange-500); color: var(--color-brown-950); }
.btn-primary:hover { background: var(--color-orange-400); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn-outline { border-color: rgba(255,255,255,.35); color: #fff; }
.btn-outline:hover { background: rgba(255,255,255,.1); }
.btn-outline-dark { border-color: var(--color-brown-900); color: var(--color-brown-900); }
.btn-outline-dark:hover { background: var(--color-brown-900); color: #fff; }
.btn-block { width: 100%; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 84px;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark { width: 42px; height: 42px; flex-shrink: 0; }
.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-text strong { font-size: 1.05rem; letter-spacing: .04em; color: var(--color-brown-950); font-weight: 800; }
.brand-text span { font-size: .68rem; letter-spacing: .16em; text-transform: uppercase; color: var(--color-orange-500); font-weight: 700; }

.nav-main { display: flex; align-items: center; gap: 4px; }
.nav-main a {
  padding: 10px 16px;
  font-size: .93rem;
  font-weight: 600;
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.nav-main a:hover, .nav-main a.active { color: var(--color-brown-950); background: var(--color-bg-alt); }

.header-actions { display: flex; align-items: center; gap: 14px; }
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 8px;
}
.nav-toggle span { width: 24px; height: 2px; background: var(--color-brown-950); border-radius: 2px; }

@media (max-width: 960px) {
  .nav-main {
    position: fixed;
    inset: 84px 0 0 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    padding: 20px;
    gap: 4px;
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
    overflow-y: auto;
  }
  .nav-main.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav-main a { padding: 14px 16px; font-size: 1.05rem; border-bottom: 1px solid var(--color-border); border-radius: 0; }
  .nav-toggle { display: flex; }
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  padding: 110px 0 100px;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(600px circle at 85% 20%, rgba(201,162,39,.18), transparent 60%),
    radial-gradient(800px circle at 10% 90%, rgba(22,135,111,.20), transparent 60%);
  pointer-events: none;
}
.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 56px;
  align-items: center;
}
@media (max-width: 900px) { .hero-grid { grid-template-columns: 1fr; } }
.hero h1 { margin-bottom: 22px; }
.hero-lead { font-size: 1.15rem; color: rgba(244,246,249,.82); max-width: 560px; margin-bottom: 34px; }
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 48px; }

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  max-width: 560px;
}
.hero-stat strong { display: block; font-size: 1.8rem; font-weight: 800; color: var(--color-orange-400); }
.hero-stat span { font-size: .82rem; color: rgba(244,246,249,.7); }

.hero-visual {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4/5;
  background: linear-gradient(155deg, var(--color-brown-800), var(--color-green-700));
  box-shadow: var(--shadow-lg);
}
.hero-visual svg { width: 100%; height: 100%; }

/* ---------- Cards ---------- */
.grid { display: grid; gap: 28px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 960px) { .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; } }

.card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  transition: var(--transition);
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: transparent; }

.icon-badge {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(155deg, var(--color-brown-900), var(--color-green-700));
  color: var(--color-orange-400);
  margin-bottom: 20px;
}
.icon-badge svg { width: 26px; height: 26px; }

.pillar-card { position: relative; }
.pillar-card .pillar-index {
  position: absolute;
  top: 24px; right: 28px;
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--color-bg-alt);
  z-index: 0;
}
.pillar-card > * { position: relative; z-index: 1; }
.pillar-card ul { margin-top: 14px; }
.pillar-card ul li {
  padding: 6px 0 6px 22px;
  position: relative;
  font-size: .92rem;
  color: var(--color-text-muted);
}
.pillar-card ul li::before {
  content: "";
  position: absolute; left: 0; top: 14px;
  width: 8px; height: 8px;
  border-radius: 2px;
  background: var(--color-orange-500);
}

/* ---------- Featured project ---------- */
.featured-project {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background: #fff;
  margin-bottom: 48px;
}
@media (max-width: 860px) { .featured-project { grid-template-columns: 1fr; } }
.featured-project-media { position: relative; min-height: 320px; }
.featured-project-media img { width: 100%; height: 100%; object-fit: cover; }
.featured-project-body { padding: 40px; display: flex; flex-direction: column; justify-content: center; }
.project-stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; margin: 24px 0; }
.project-stat strong { display: block; font-size: 1.3rem; font-weight: 800; color: var(--color-orange-500); }
.project-stat span { font-size: .78rem; color: var(--color-text-muted); }

/* ---------- Project cards ---------- */
.project-card { border-radius: var(--radius-md); overflow: hidden; border: 1px solid var(--color-border); background: #fff; transition: var(--transition); }
.project-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.project-thumb { aspect-ratio: 16/10; position: relative; overflow: hidden; }
.project-thumb svg { width: 100%; height: 100%; }
.project-tag {
  position: absolute; top: 16px; left: 16px;
  background: rgba(6,21,41,.75);
  color: var(--color-orange-400);
  font-size: .72rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase;
  padding: 6px 12px; border-radius: 999px;
}
.project-status {
  position: absolute; top: 16px; right: 16px;
  background: var(--color-orange-500);
  color: var(--color-brown-950);
  font-size: .72rem; font-weight: 700;
  padding: 6px 12px; border-radius: 999px;
}
.project-body { padding: 24px; }
.project-meta { display: flex; gap: 16px; margin-top: 14px; font-size: .82rem; color: var(--color-text-muted); flex-wrap: wrap; }
.project-meta span { display: flex; align-items: center; gap: 6px; }

/* ---------- Timeline ---------- */
.timeline { position: relative; padding-left: 32px; border-left: 2px solid var(--color-border); }
.timeline-item { position: relative; padding-bottom: 40px; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item::before {
  content: "";
  position: absolute; left: -38px; top: 4px;
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--color-orange-500);
  box-shadow: 0 0 0 4px var(--color-orange-100);
}
.timeline-year { font-weight: 800; color: var(--color-brown-900); font-size: 1.1rem; margin-bottom: 6px; }

/* ---------- Values ---------- */
.value-item { display: flex; gap: 18px; }
.value-num { font-size: 1.6rem; font-weight: 800; color: var(--color-orange-500); flex-shrink: 0; width: 46px; }

/* ---------- News ---------- */
.news-card { display: flex; flex-direction: column; height: 100%; }
.news-date { font-size: .8rem; color: var(--color-orange-500); font-weight: 700; letter-spacing: .04em; text-transform: uppercase; margin-bottom: 10px; }
.news-card h3 { margin-bottom: 10px; }
.news-card p { color: var(--color-text-muted); font-size: .95rem; }
.news-more { margin-top: auto; font-weight: 700; color: var(--color-brown-900); font-size: .9rem; display: inline-flex; align-items: center; gap: 6px; }

/* ---------- CTA banner ---------- */
.cta-banner {
  border-radius: var(--radius-lg);
  padding: 56px;
  background: linear-gradient(135deg, var(--color-brown-950), var(--color-green-700));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}
.cta-banner h2 { color: #fff; margin-bottom: 8px; }
.cta-banner p { color: rgba(244,246,249,.8); margin: 0; }

/* ---------- Forms ---------- */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
@media (max-width: 640px) { .form-grid { grid-template-columns: 1fr; } }
.form-field { display: flex; flex-direction: column; gap: 8px; margin-bottom: 20px; }
.form-field.full { grid-column: 1 / -1; }
.form-field label { font-size: .88rem; font-weight: 600; color: var(--color-text); }
.form-field input, .form-field textarea, .form-field select {
  padding: 13px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg-alt);
  transition: var(--transition);
}
.form-field input:focus, .form-field textarea:focus, .form-field select:focus {
  outline: none; border-color: var(--color-green-500); background: #fff;
}
.form-note { font-size: .85rem; color: var(--color-text-muted); margin-top: 10px; }
.form-success {
  display: none;
  background: var(--color-orange-100);
  border: 1px solid var(--color-orange-500);
  color: var(--color-brown-950);
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  margin-bottom: 20px;
}
.form-success.show { display: block; }

/* ---------- Contact info cards ---------- */
.contact-info-item { display: flex; gap: 16px; padding: 20px 0; border-bottom: 1px solid var(--color-border); }
.contact-info-item:last-child { border-bottom: none; }
.contact-info-item .icon-badge { width: 44px; height: 44px; margin-bottom: 0; flex-shrink: 0; border-radius: 12px; }
.contact-info-item h4 { margin-bottom: 4px; font-size: 1rem; }
.contact-info-item p { margin: 0; color: var(--color-text-muted); font-size: .92rem; }

.map-embed { border-radius: var(--radius-md); overflow: hidden; border: 1px solid var(--color-border); aspect-ratio: 16/9; }
.map-embed iframe { width: 100%; height: 100%; border: 0; }

/* ---------- Breadcrumb / page header ---------- */
.page-header { padding: 64px 0 56px; }
.page-header .eyebrow { color: var(--color-orange-400); }
.page-header p { color: rgba(244,246,249,.78); max-width: 620px; font-size: 1.05rem; }

/* ---------- Khối / company ecosystem ---------- */
.khoi-card { display: flex; flex-direction: column; gap: 0; }
.khoi-head { display: flex; align-items: flex-start; gap: 16px; margin-bottom: 22px; }
.khoi-num {
  flex-shrink: 0;
  width: 44px; height: 44px;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(155deg, var(--color-brown-900), var(--color-green-700));
  color: var(--color-orange-400);
  font-weight: 800;
  font-size: 1.05rem;
}
.company-list { display: flex; flex-direction: column; gap: 14px; }
.company-item {
  padding: 16px 18px;
  border-radius: var(--radius-sm);
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
}
.company-item .company-name { font-weight: 700; color: var(--color-brown-950); font-size: .96rem; margin-bottom: 4px; }
.company-item .company-meta { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-bottom: 6px; }
.company-item .company-owner {
  font-size: .78rem; font-weight: 700;
  color: var(--color-brown-900);
  background: var(--color-orange-100);
  padding: 3px 10px;
  border-radius: 999px;
}
.company-item p { margin: 0; font-size: .86rem; color: var(--color-text-muted); }

.founder-banner {
  display: flex;
  align-items: center;
  gap: 20px;
  background: linear-gradient(135deg, var(--color-brown-950), var(--color-green-700));
  border-radius: var(--radius-lg);
  padding: 32px 36px;
  color: #fff;
  flex-wrap: wrap;
}
.founder-avatar {
  width: 64px; height: 64px; flex-shrink: 0;
  border-radius: 50%;
  background: var(--color-orange-500);
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 1.4rem; color: var(--color-brown-950);
}
.founder-banner h3 { color: #fff; margin-bottom: 2px; }
.founder-banner span.role { color: var(--color-orange-400); font-weight: 700; font-size: .85rem; letter-spacing: .04em; text-transform: uppercase; }
.founder-banner p { color: rgba(244,246,249,.82); margin: 8px 0 0; max-width: 640px; }

.flow-list { display: flex; flex-direction: column; gap: 14px; counter-reset: flow; }
.flow-item {
  display: flex; align-items: flex-start; gap: 16px;
  padding: 18px 20px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}
.flow-item::before {
  counter-increment: flow;
  content: counter(flow);
  flex-shrink: 0;
  width: 30px; height: 30px;
  border-radius: 50%;
  background: var(--color-orange-500);
  color: #fff;
  font-weight: 800;
  font-size: .85rem;
  display: flex; align-items: center; justify-content: center;
}
.flow-item p { margin: 0; color: var(--color-text-muted); font-size: .93rem; }
.flow-item strong { color: var(--color-brown-950); }

/* ---------- Org chart ---------- */
.org-chart { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; margin-top: 20px; }
.org-node { background: var(--color-bg-alt); border: 1px solid var(--color-border); border-radius: var(--radius-sm); padding: 18px; text-align: center; font-weight: 700; color: var(--color-brown-900); font-size: .92rem; }
.org-node.lead { background: var(--color-brown-950); color: #fff; grid-column: 1 / -1; }

/* ---------- Footer ---------- */
.site-footer { background: var(--color-brown-950); color: rgba(244,246,249,.75); padding: 72px 0 28px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.2fr; gap: 40px; margin-bottom: 48px; }
@media (max-width: 900px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .footer-grid { grid-template-columns: 1fr; } }
.footer-brand .brand-text strong { color: #fff; }
.footer-about { font-size: .9rem; max-width: 320px; margin: 16px 0 20px; }
.footer-social { display: flex; gap: 10px; }
.footer-social a {
  width: 38px; height: 38px; border-radius: 50%;
  background: rgba(255,255,255,.08);
  display: flex; align-items: center; justify-content: center;
  transition: var(--transition);
}
.footer-social a:hover { background: var(--color-orange-500); color: var(--color-brown-950); }
.footer-col h5 { color: #fff; font-size: .82rem; letter-spacing: .1em; text-transform: uppercase; margin-bottom: 18px; }
.footer-col ul li { margin-bottom: 12px; }
.footer-col a { font-size: .92rem; transition: var(--transition); }
.footer-col a:hover { color: var(--color-orange-400); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: .82rem;
}

/* ---------- Utilities ---------- */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.tag-list { display: flex; flex-wrap: wrap; gap: 10px; }
.tag {
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--color-bg-alt);
  font-size: .82rem;
  font-weight: 600;
  color: var(--color-brown-900);
  border: 1px solid var(--color-border);
}
.tag[data-filter] { cursor: pointer; transition: var(--transition); }
.tag[data-filter]:hover { border-color: var(--color-orange-500); }
.tag-active { background: var(--color-brown-950); color: #fff; border-color: var(--color-brown-950); }
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: translateY(0); }