/* ==========================================================================
   CANOPY VIETNAM — STYLESHEET
   Tài liệu tham chiếu: BI-CV-001 v2.0 (Bộ nhận diện thương hiệu)
   Mọi màu sắc, font chữ đều khai báo dạng biến (variables) ở đầu file.
   NGƯỜI KHÔNG BIẾT CODE: chỉ cần sửa giá trị trong khối ":root" dưới đây
   để đổi màu toàn bộ website, không cần sửa ở chỗ khác.
   ========================================================================== */

:root {
  /* --- Màu chính (Primary) --- */
  --forest-deep: #0D2E1A;
  --canopy-green: #1E5E38;
  --leaf: #3A9062;

  /* --- Màu phụ (Secondary) --- */
  --sunlight-gold: #D4A843;
  --bark-brown: #7A5230;
  --mist: #EEF7F1;

  /* --- Màu nền / chữ dùng chung --- */
  --white: #FFFFFF;
  --ink: #1A1A1A;

  /* --- Font chữ --- */
  --font-display: 'Playfair Display', Georgia, serif;
  --font-body: 'DM Sans', Arial, sans-serif;

  /* --- Khoảng cách / bo góc dùng chung --- */
  --radius: 14px;
  --container-width: 1140px;
  --section-padding: 96px;
}

/* ---------- Reset cơ bản ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--white);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

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

ul { list-style: none; }

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

section { padding: var(--section-padding) 0; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--forest-deep);
  line-height: 1.2;
  font-weight: 700;
}

h1 { font-size: clamp(2.4rem, 5vw, 4rem); }
h2 { font-size: clamp(1.9rem, 3.4vw, 2.6rem); }
h3 { font-size: 1.4rem; }

p { color: #3a3a3a; }

.eyebrow {
  font-family: var(--font-body);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--leaf);
  display: inline-block;
  margin-bottom: 14px;
}

.lede {
  font-size: 1.15rem;
  color: #4a4a4a;
  max-width: 640px;
}

/* ---------- Nút bấm (Buttons) ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.95rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
  border: 2px solid transparent;
  cursor: pointer;
}

.btn-primary {
  background: var(--canopy-green);
  color: var(--white);
}
.btn-primary:hover {
  background: var(--forest-deep);
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(13,46,26,0.25);
}

.btn-outline {
  background: transparent;
  border-color: var(--mist);
  color: var(--forest-deep);
}
.btn-outline:hover {
  border-color: var(--canopy-green);
  background: var(--mist);
}

.btn-gold {
  background: var(--sunlight-gold);
  color: var(--forest-deep);
}
.btn-gold:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(212,168,67,0.35);
}

/* ==========================================================================
   HEADER / ĐIỀU HƯỚNG
   ========================================================================== */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(13,46,26,0.08);
  transition: background 0.3s ease;
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--forest-deep);
}
.brand img { width: 38px; height: 38px; }
.brand .brand-vn { display: block; font-family: var(--font-body); font-weight: 400; font-size: 0.7rem; color: var(--leaf); letter-spacing: 0.04em; }

.nav-links {
  display: flex;
  gap: 36px;
  align-items: center;
}
.nav-links a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--ink);
  position: relative;
  padding: 6px 0;
  margin-right: 36px; /* dự phòng cho trình duyệt cũ không hỗ trợ "gap" trong flexbox */
}
.nav-links a:last-child { margin-right: 0; }
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: 2px;
  background: var(--leaf);
  transition: width 0.25s ease;
}
.nav-links a:hover::after { width: 100%; }

.nav-cta { display: flex; align-items: center; gap: 16px; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle span { width: 24px; height: 2px; background: var(--forest-deep); border-radius: 2px; }

/* ==========================================================================
   HERO
   ========================================================================== */
.hero {
  position: relative;
  padding-top: 180px;
  padding-bottom: 120px;
  background: linear-gradient(160deg, var(--mist) 0%, #ffffff 60%);
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: -120px; right: -120px;
  width: 480px; height: 480px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(58,144,98,0.16) 0%, rgba(58,144,98,0) 70%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 64px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero h1 { margin-bottom: 22px; }
.hero h1 .accent { color: var(--leaf); font-style: italic; }

.hero-actions { display: flex; gap: 16px; margin-top: 36px; flex-wrap: wrap; }

.hero-stats {
  display: flex;
  gap: 36px;
  margin-top: 52px;
  flex-wrap: wrap;
}
.hero-stats > div { margin-right: 36px; }
.hero-stats > div:last-child { margin-right: 0; }
.hero-stats .stat-num {
  font-family: var(--font-display);
  font-size: 2.1rem;
  color: var(--forest-deep);
  font-weight: 700;
}
.hero-stats .stat-label {
  font-size: 0.82rem;
  color: var(--bark-brown);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.hero-visual {
  position: relative;
  border-radius: 28px;
  overflow: hidden;
  aspect-ratio: 4/5;
  min-height: 420px; /* dự phòng cho trình duyệt cũ không hỗ trợ aspect-ratio */
  background: var(--forest-deep);
}
.hero-visual img { width: 100%; height: 100%; object-fit: cover; }
.hero-visual .tag {
  position: absolute;
  bottom: 24px; left: 24px;
  background: rgba(255,255,255,0.92);
  padding: 12px 18px;
  border-radius: var(--radius);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--forest-deep);
  display: flex;
  align-items: center;
  gap: 8px;
}
.hero-visual .tag .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--leaf); }

/* ==========================================================================
   SECTION HEADERS DÙNG CHUNG
   ========================================================================== */
.section-head {
  max-width: 680px;
  margin-bottom: 56px;
}
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }

/* ==========================================================================
   VỀ CHÚNG TÔI
   ========================================================================== */
.about { background: var(--white); }
.about-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 64px;
  align-items: center;
}
.about-image {
  border-radius: 24px;
  overflow: hidden;
  aspect-ratio: 1/1;
  min-height: 380px; /* dự phòng cho trình duyệt cũ không hỗ trợ aspect-ratio */
}
.about-image img { width: 100%; height: 100%; object-fit: cover; }

.about-points { margin-top: 28px; display: flex; flex-direction: column; gap: 18px; }
.about-point { display: flex; gap: 14px; }
.about-point .icon-dot {
  flex-shrink: 0;
  width: 28px; height: 28px;
  border-radius: 50%;
  background: var(--mist);
  color: var(--canopy-green);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
}
.about-point h4 { font-family: var(--font-body); font-size: 1.02rem; color: var(--forest-deep); margin-bottom: 2px; }
.about-point p { font-size: 0.94rem; }

/* ==========================================================================
   QUY TRÌNH (PROCESS)
   ========================================================================== */
.process { background: var(--forest-deep); color: var(--white); }
.process .section-head h2,
.process .section-head .eyebrow { color: var(--white); }
.process .eyebrow { color: var(--sunlight-gold); }
.process p { color: rgba(255,255,255,0.72); }

.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  margin-top: 20px;
}
.process-step {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: background 0.25s ease, transform 0.25s ease;
}
.process-step:hover { background: rgba(255,255,255,0.09); transform: translateY(-4px); }
.process-step .step-num {
  font-family: var(--font-display);
  font-size: 1.6rem;
  color: var(--leaf);
  margin-bottom: 14px;
}
.process-step h4 { font-family: var(--font-body); color: var(--white); font-size: 1.02rem; margin-bottom: 8px; }
.process-step p { font-size: 0.88rem; color: rgba(255,255,255,0.65); }

/* ==========================================================================
   SẢN PHẨM
   ========================================================================== */
.products { background: var(--mist); }

.product-tabs {
  display: flex;
  gap: 12px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}
.product-tab {
  padding: 10px 22px;
  border-radius: 999px;
  background: var(--white);
  border: 1px solid rgba(13,46,26,0.12);
  font-weight: 700;
  font-size: 0.88rem;
  color: var(--forest-deep);
  cursor: pointer;
  transition: all 0.2s ease;
}
.product-tab.active,
.product-tab:hover {
  background: var(--canopy-green);
  color: var(--white);
  border-color: var(--canopy-green);
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.product-group { display: none; }
.product-group.active { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }

.product-card {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid rgba(13,46,26,0.07);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.product-card:hover { transform: translateY(-6px); box-shadow: 0 18px 40px rgba(13,46,26,0.12); }

.product-card .pc-image { aspect-ratio: 4/3; min-height: 200px; overflow: hidden; background: var(--canopy-green); }
.product-card .pc-image img { width: 100%; height: 100%; object-fit: cover; }

.product-card .pc-body { padding: 22px 24px 26px; }
.product-card .pc-tag {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 700;
  color: var(--leaf);
  margin-bottom: 8px;
  display: block;
}
.product-card h3 { font-family: var(--font-body); font-size: 1.12rem; color: var(--forest-deep); margin-bottom: 8px; }
.product-card p { font-size: 0.9rem; margin-bottom: 16px; }

.pc-specs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
.pc-specs span {
  font-size: 0.76rem;
  background: var(--mist);
  color: var(--bark-brown);
  padding: 5px 12px;
  border-radius: 999px;
  font-weight: 600;
}

.pc-link {
  font-size: 0.86rem;
  font-weight: 700;
  color: var(--canopy-green);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.pc-link:hover { color: var(--forest-deep); }

/* ==========================================================================
   DỊCH VỤ
   ========================================================================== */
.services { background: var(--white); }
.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.service-card {
  padding: 36px 28px;
  border-radius: var(--radius);
  border: 1px solid rgba(13,46,26,0.08);
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}
.service-card:hover { border-color: var(--leaf); box-shadow: 0 16px 32px rgba(13,46,26,0.08); }
.service-card .svc-icon {
  width: 52px; height: 52px;
  border-radius: 14px;
  background: var(--mist);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 22px;
  font-size: 1.4rem;
}
.service-card h3 { font-family: var(--font-body); font-size: 1.1rem; margin-bottom: 10px; }
.service-card p { font-size: 0.92rem; }

/* ==========================================================================
   CHỨNG NHẬN / NIỀM TIN
   ========================================================================== */
.trust { background: var(--mist); }
.trust-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}
.trust-item {
  background: var(--white);
  border-radius: var(--radius);
  padding: 28px 20px;
}
.trust-item .trust-icon { font-size: 1.8rem; margin-bottom: 12px; }
.trust-item h4 { font-family: var(--font-body); font-size: 0.95rem; color: var(--forest-deep); margin-bottom: 6px; }
.trust-item p { font-size: 0.82rem; }

/* ==========================================================================
   LIÊN HỆ
   ========================================================================== */
.contact { background: var(--forest-deep); color: var(--white); }
.contact .eyebrow { color: var(--sunlight-gold); }
.contact h2 { color: var(--white); }
.contact .lede { color: rgba(255,255,255,0.7); }

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  margin-top: 20px;
}

.contact-info { display: flex; flex-direction: column; gap: 26px; }
.contact-row { display: flex; gap: 16px; align-items: flex-start; }
.contact-row .ci-icon {
  width: 44px; height: 44px;
  border-radius: 12px;
  background: rgba(255,255,255,0.08);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.contact-row h4 { font-family: var(--font-body); color: var(--white); font-size: 0.96rem; margin-bottom: 4px; }
.contact-row p, .contact-row a { color: rgba(255,255,255,0.68); font-size: 0.92rem; }
.contact-row a:hover { color: var(--leaf); }

.contact-form {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius);
  padding: 32px;
}
.form-row { margin-bottom: 18px; }
.form-row label {
  display: block;
  font-size: 0.82rem;
  margin-bottom: 8px;
  color: rgba(255,255,255,0.75);
  font-weight: 600;
}
.form-row input, .form-row textarea, .form-row select {
  width: 100%;
  padding: 13px 16px;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.18);
  background: rgba(255,255,255,0.06);
  color: var(--white);
  font-family: var(--font-body);
  font-size: 0.92rem;
}
.form-row input::placeholder, .form-row textarea::placeholder { color: rgba(255,255,255,0.4); }
.form-row input:focus, .form-row textarea:focus, .form-row select:focus {
  outline: none;
  border-color: var(--leaf);
  background: rgba(255,255,255,0.1);
}
.form-row textarea { resize: vertical; min-height: 100px; }

.form-note { font-size: 0.78rem; color: rgba(255,255,255,0.45); margin-top: 14px; }

/* ==========================================================================
   FOOTER
   ========================================================================== */
.site-footer {
  background: #081D11;
  color: rgba(255,255,255,0.6);
  padding: 56px 0 28px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.footer-brand img { width: 32px; height: 32px; }
.footer-brand span { font-family: var(--font-display); color: var(--white); font-size: 1.05rem; font-weight: 700; }
.footer-col h4 { font-family: var(--font-body); color: var(--white); font-size: 0.88rem; text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 16px; }
.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col a { font-size: 0.9rem; }
.footer-col a:hover { color: var(--leaf); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  font-size: 0.82rem;
  flex-wrap: wrap;
  gap: 12px;
}

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */
@media (max-width: 980px) {
  .hero-grid, .about-grid, .contact-grid { grid-template-columns: 1fr; }
  .hero-visual { order: -1; }
  .process-steps, .product-grid, .product-group.active, .service-grid { grid-template-columns: repeat(2, 1fr); }
  .trust-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 720px) {
  :root { --section-padding: 64px; }
  .nav-links, .nav-cta .btn-outline { display: none; }
  .nav-toggle { display: flex; }
  .nav-links.open {
    display: flex;
    position: absolute;
    top: 76px; left: 0; right: 0;
    background: var(--white);
    flex-direction: column;
    align-items: stretch;
    padding: 8px 24px 16px;
    gap: 0;
    border-bottom: 1px solid rgba(13,46,26,0.08);
    box-shadow: 0 12px 24px rgba(13,46,26,0.08);
  }
  .nav-links.open a {
    margin-right: 0; /* hủy margin dự phòng của chế độ menu ngang */
    width: 100%;
    text-align: left;
    padding: 16px 0;
    border-bottom: 1px solid rgba(13,46,26,0.06);
    font-size: 1rem;
  }
  .nav-links.open a:last-child { border-bottom: none; }
  .hero { padding-top: 140px; }
  .process-steps, .product-grid, .product-group.active, .service-grid, .trust-grid, .footer-grid { grid-template-columns: 1fr; }
  .hero-stats { gap: 24px; }
}

/* ---------- Tiện ích: reveal khi cuộn ---------- */
/* An toàn theo "progressive enhancement": nội dung HIỂN THỊ BÌNH THƯỜNG theo mặc định.
   Chỉ khi JavaScript đã chạy và gắn class "js-ready" vào <body> thì hiệu ứng
   ẩn/hiện mới được áp dụng. Nếu JS lỗi hoặc chưa kịp chạy, nội dung vẫn luôn hiện. */
.js-ready .reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.6s ease, transform 0.6s ease; }
.js-ready .reveal.in-view { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}