/* ==========================================================================
   TỊNH MỘC - NGHỆ THUẬT THIẾT KẾ & XÂY DỰNG KHÔNG GIAN THIỀN MỘC
   Chất liệu cốt lõi: Gỗ Lũa, Đá Tự Nhiên, Trà Thất & Phật Giáo
   ========================================================================== */

:root {
  /* Bảng màu Zen & Wabi-Sabi */
  --c-bg: #F7F5EE;              /* Nền giấy dó / cát mịn trầm dịu */
  --c-bg-subtle: #EFECE3;       /* Nền phân đoạn phụ */
  --c-card-bg: #FFFFFF;
  --c-wood-dark: #332014;       /* Nâu trầm gỗ lũa nguyên bản */
  --c-wood-med: #593C29;        /* Nâu ấm thớ mộc */
  --c-wood-light: #80614B;      /* Nâu vỏ cây phong hóa */
  --c-stone-dark: #363A36;      /* Xám đá suối trầm mặc */
  --c-stone-light: #6E756B;     /* Xám sa thạch */
  --c-moss: #4E5940;            /* Xanh rêu vườn thiền */
  --c-gold: #BFA15F;            /* Vàng đồng ánh nến */
  --c-text-main: #26211D;       /* Màu chữ chính */
  --c-text-muted: #69625A;      /* Màu chữ phụ */
  
  --font-serif: 'Noto Serif', serif;
  --font-display: 'Cinzel', serif;
  --font-sans: 'Plus Jakarta Sans', sans-serif;
  
  --transition: all 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --shadow-zen: 0 12px 36px rgba(51, 32, 20, 0.06);
  --shadow-card: 0 8px 24px rgba(51, 32, 20, 0.04);
}

/* 1. Thiết lập chung */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background-color: var(--c-bg);
  color: var(--c-text-main);
  line-height: 1.75;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  color: var(--c-wood-dark);
  font-weight: 600;
  line-height: 1.35;
}

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}

.container {
  width: 90%;
  max-width: 1220px;
  margin: 0 auto;
}

.section-padding {
  padding: 100px 0;
}

.text-center {
  text-align: center;
}

/* 2. Tiêu đề phân đoạn & Trang trí */
.section-header {
  max-width: 780px;
  margin: 0 auto 55px auto;
}

.subtitle {
  display: inline-block;
  font-size: 0.8rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--c-gold);
  font-weight: 600;
  margin-bottom: 10px;
}

.subtitle.light {
  color: #D6BD88;
}

.title {
  font-size: 2.4rem;
  letter-spacing: -0.5px;
  margin-bottom: 14px;
}

.divider {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 15px;
  margin: 15px auto 20px auto;
}

.divider::before,
.divider::after {
  content: "";
  display: block;
  width: 60px;
  height: 1px;
  background-color: var(--c-gold);
  opacity: 0.5;
}

.divider-leaf {
  color: var(--c-gold);
  font-size: 1.2rem;
}

.section-intro {
  color: var(--c-text-muted);
  font-size: 1.05rem;
  line-height: 1.8;
}

/* 3. Nút bấm (Buttons) */
.btn {
  display: inline-block;
  padding: 14px 34px;
  font-size: 0.95rem;
  font-weight: 500;
  border-radius: 3px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: var(--transition);
  text-align: center;
}

.btn-primary {
  background-color: var(--c-wood-dark);
  color: #FFFFFF;
  border-color: var(--c-wood-dark);
}

.btn-primary:hover {
  background-color: var(--c-wood-med);
  border-color: var(--c-wood-med);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(51, 32, 20, 0.25);
}

.btn-outline {
  background-color: transparent;
  color: var(--c-wood-dark);
  border-color: var(--c-wood-dark);
}

.btn-outline:hover {
  background-color: var(--c-wood-dark);
  color: #FFFFFF;
  transform: translateY(-2px);
}

.btn-block {
  width: 100%;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background-color: rgba(247, 245, 238, 0.94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(51, 32, 20, 0.08);
  transition: var(--transition);
}

.header.scrolled {
  background-color: #FAF8F2;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-logo {
  height: 52px;
  width: auto;
  object-fit: contain;
  border-radius: 4px;
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--c-wood-dark);
}

.brand-sub {
  font-size: 0.65rem;
  letter-spacing: 2.5px;
  color: var(--c-text-muted);
}

.nav-list {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 30px;
}

.nav-link {
  font-size: 0.92rem;
  color: var(--c-text-main);
  font-weight: 500;
  position: relative;
  padding: 5px 0;
}

.nav-link:hover {
  color: var(--c-gold);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1.5px;
  background-color: var(--c-gold);
  transition: var(--transition);
}

.nav-link:hover::after {
  width: 100%;
}

.nav-btn {
  padding: 9px 20px;
  border: 1px solid var(--c-wood-dark);
  border-radius: 2px;
  color: var(--c-wood-dark) !important;
}

.nav-btn:hover {
  background-color: var(--c-wood-dark);
  color: #FFFFFF !important;
}

.nav-btn::after {
  display: none;
}

.hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  flex-direction: column;
  gap: 6px;
  padding: 6px;
}

.hamburger span {
  display: block;
  width: 26px;
  height: 2px;
  background-color: var(--c-wood-dark);
  transition: var(--transition);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
  position: relative;
  min-height: 94vh;
  display: flex;
  align-items: center;
  padding-top: 90px;
  background: radial-gradient(circle at 75% 35%, #E5DDD0 0%, #D8CDBE 50%, #C4B6A4 100%);
  background-size: cover;
  overflow: hidden;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to right, rgba(247, 245, 238, 0.96) 0%, rgba(247, 245, 238, 0.82) 55%, rgba(247, 245, 238, 0.45) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 720px;
}

.zen-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--c-moss);
  font-weight: 600;
  margin-bottom: 18px;
  background: rgba(78, 89, 64, 0.08);
  padding: 6px 16px;
  border-radius: 30px;
}

.hero-title {
  font-size: 3.8rem;
  line-height: 1.15;
  margin-bottom: 24px;
  color: var(--c-wood-dark);
}

.hero-title span {
  font-weight: 300;
  font-style: italic;
  color: var(--c-wood-med);
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--c-text-muted);
  margin-bottom: 38px;
  line-height: 1.85;
}

.hero-desc strong {
  color: var(--c-wood-dark);
  font-weight: 600;
}

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

.scroll-down {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  opacity: 0.6;
  transition: var(--transition);
}

.scroll-down:hover {
  opacity: 1;
}

.mouse {
  width: 24px;
  height: 38px;
  border: 2px solid var(--c-wood-dark);
  border-radius: 12px;
  position: relative;
}

.mouse::after {
  content: '';
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 6px;
  background: var(--c-wood-dark);
  border-radius: 2px;
  animation: scrollAnim 1.6s infinite;
}

@keyframes scrollAnim {
  0% { opacity: 1; transform: translate(-50%, 0); }
  100% { opacity: 0; transform: translate(-50%, 14px); }
}

/* ==========================================================================
   Triết Lý Tịnh Mộc
   ========================================================================== */
.philosophy {
  background-color: var(--c-bg);
}

.philosophy-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 32px;
}

.philosophy-card {
  background: var(--c-card-bg);
  padding: 45px 34px;
  border-radius: 4px;
  border: 1px solid rgba(51, 32, 20, 0.05);
  box-shadow: var(--shadow-card);
  transition: var(--transition);
  position: relative;
}

.philosophy-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-zen);
  border-color: var(--c-gold);
}

.philo-num {
  font-family: var(--font-display);
  font-size: 2.4rem;
  color: var(--c-gold);
  opacity: 0.45;
  margin-bottom: 12px;
}

.philosophy-card h3 {
  font-size: 1.45rem;
  margin-bottom: 16px;
}

.philosophy-card p {
  color: var(--c-text-muted);
  font-size: 0.95rem;
}

/* ==========================================================================
   Chất Liệu Cốt Lõi: Gỗ Lũa & Đá Tự Nhiên
   ========================================================================== */
.materials {
  background-color: var(--c-bg-subtle);
}

.material-showcase {
  display: flex;
  flex-direction: column;
  gap: 60px;
}

.material-item {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 50px;
  align-items: center;
  background: var(--c-card-bg);
  padding: 48px;
  border-radius: 6px;
  box-shadow: var(--shadow-zen);
}

.material-item.reverse {
  grid-template-columns: 0.9fr 1.1fr;
}

.material-item.reverse .material-text {
  order: 2;
}

.material-item.reverse .material-visual {
  order: 1;
}

.item-tag {
  display: inline-block;
  font-size: 0.8rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--c-moss);
  font-weight: 600;
  margin-bottom: 10px;
}

.material-text h3 {
  font-size: 1.9rem;
  margin-bottom: 18px;
}

.material-text p {
  color: var(--c-text-muted);
  margin-bottom: 22px;
  font-size: 0.98rem;
}

.material-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.material-list li {
  font-size: 0.95rem;
  color: var(--c-text-main);
}

.material-list strong {
  color: var(--c-wood-dark);
}

.bullet {
  color: var(--c-gold);
  margin-right: 8px;
}

.material-visual {
  min-height: 360px;
  border-radius: 4px;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: flex-end;
  padding: 24px;
}

.visual-wood {
  background: linear-gradient(135deg, #442A1D 0%, #22140D 100%);
  background-image: 
    repeating-linear-gradient(45deg, rgba(255,255,255,0.02) 0px, rgba(255,255,255,0.02) 2px, transparent 2px, transparent 5px),
    radial-gradient(ellipse at 80% 20%, rgba(191, 161, 95, 0.25), transparent 70%);
}

.visual-stone {
  background: linear-gradient(135deg, #4F5552 0%, #262B28 100%);
  background-image: 
    radial-gradient(rgba(255,255,255,0.05) 1px, transparent 0),
    radial-gradient(circle at 20% 80%, rgba(80, 88, 68, 0.35), transparent 60%);
  background-size: 14px 14px, 100% 100%;
}

.visual-card {
  background: rgba(247, 245, 238, 0.92);
  backdrop-filter: blur(8px);
  padding: 12px 22px;
  border-radius: 4px;
  display: flex;
  flex-direction: column;
  border-left: 3px solid var(--c-gold);
}

.card-title {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1rem;
  color: var(--c-wood-dark);
}

.card-sub {
  font-size: 0.8rem;
  color: var(--c-text-muted);
}

/* ==========================================================================
   Không Gian Đặc Trưng
   ========================================================================== */
.spaces {
  background-color: var(--c-bg);
}

.space-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
  gap: 28px;
}

.space-card {
  background: var(--c-card-bg);
  padding: 40px 28px;
  border-radius: 4px;
  border-top: 3px solid transparent;
  transition: var(--transition);
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
}

.space-card:hover {
  border-top-color: var(--c-gold);
  transform: translateY(-6px);
  box-shadow: var(--shadow-zen);
}

.space-card.highlight {
  border-top-color: var(--c-wood-dark);
  background: #FCFAF6;
}

.space-icon {
  font-size: 3rem;
  margin-bottom: 18px;
}

.space-card h3 {
  font-size: 1.35rem;
  margin-bottom: 14px;
}

.space-card p {
  color: var(--c-text-muted);
  font-size: 0.94rem;
  line-height: 1.7;
  flex-grow: 1;
  margin-bottom: 20px;
}

.space-link {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--c-wood-dark);
  display: inline-block;
}

.space-link:hover {
  color: var(--c-gold);
  transform: translateX(4px);
}

/* ==========================================================================
   Bộ Sưu Tập Tác Phẩm (Gallery)
   ========================================================================== */
.gallery {
  background-color: var(--c-bg-subtle);
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 26px;
}

.gallery-card {
  background: var(--c-card-bg);
  border-radius: 4px;
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: var(--transition);
}

.gallery-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-zen);
}

.gallery-img-box {
  height: 240px;
  position: relative;
  transition: var(--transition);
}

.gallery-card:hover .gallery-img-box {
  transform: scale(1.03);
}

.g-tea {
  background: linear-gradient(to top, rgba(34, 20, 13, 0.8), rgba(34, 20, 13, 0.1)), #452D1F;
}

.g-buddha {
  background: linear-gradient(to top, rgba(34, 38, 34, 0.8), rgba(34, 38, 34, 0.1)), #363A36;
}

.g-garden {
  background: linear-gradient(to top, rgba(35, 42, 28, 0.8), rgba(35, 42, 28, 0.1)), #3E4733;
}

.g-living {
  background: linear-gradient(to top, rgba(51, 32, 20, 0.8), rgba(51, 32, 20, 0.1)), #553D2F;
}

.gallery-meta {
  padding: 22px;
}

.gallery-tag {
  display: inline-block;
  font-size: 0.75rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--c-gold);
  font-weight: 600;
  margin-bottom: 6px;
}

.gallery-meta h4 {
  font-size: 1.25rem;
  margin-bottom: 6px;
}

.gallery-meta p {
  color: var(--c-text-muted);
  font-size: 0.88rem;
}

/* ==========================================================================
   Quy Trình Kiến Tạo
   ========================================================================== */
.process {
  background-color: var(--c-bg);
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
  position: relative;
}

.step-card {
  background: var(--c-card-bg);
  padding: 35px 25px;
  border-radius: 4px;
  box-shadow: var(--shadow-card);
  position: relative;
  transition: var(--transition);
}

.step-card:hover {
  transform: translateY(-4px);
  border-bottom: 2px solid var(--c-gold);
}

.step-badge {
  width: 44px;
  height: 44px;
  background-color: var(--c-wood-dark);
  color: #FFFFFF;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: 18px;
}

.step-card h4 {
  font-size: 1.2rem;
  margin-bottom: 10px;
}

.step-card p {
  color: var(--c-text-muted);
  font-size: 0.92rem;
}

/* ==========================================================================
   Liên Hệ & Đăng Ký
   ========================================================================== */
.contact {
  background-color: var(--c-bg-subtle);
}

.contact-box {
  display: grid;
  grid-template-columns: 1fr 1fr;
  background: var(--c-card-bg);
  border-radius: 6px;
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(51, 32, 20, 0.08);
}

.contact-info {
  background-color: var(--c-wood-dark);
  color: #F7F5EE;
  padding: 60px 48px;
}

.contact-info h2 {
  color: #FFFFFF;
  font-size: 2.2rem;
  margin-bottom: 16px;
}

.contact-lead {
  color: #D6CEC8;
  margin-bottom: 38px;
  font-size: 0.98rem;
  line-height: 1.8;
}

.info-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.info-item {
  display: flex;
  gap: 16px;
}

.info-icon {
  font-size: 1.35rem;
  line-height: 1;
}

.info-details strong {
  display: block;
  font-size: 0.92rem;
  color: #D6BD88;
  margin-bottom: 4px;
}

.info-details p {
  color: #ECE7E2;
  font-size: 0.92rem;
  line-height: 1.6;
}

.contact-form-wrap {
  padding: 60px 48px;
  background: #FFFFFF;
}

.contact-form-wrap h3 {
  font-size: 1.7rem;
  margin-bottom: 8px;
}

.contact-form-wrap p {
  color: var(--c-text-muted);
  font-size: 0.92rem;
  margin-bottom: 28px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--c-text-main);
  margin-bottom: 6px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid #DFD8CF;
  border-radius: 4px;
  font-family: inherit;
  font-size: 0.94rem;
  background-color: #FAF8F2;
  color: var(--c-text-main);
  transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--c-wood-dark);
  background-color: #FFFFFF;
  box-shadow: 0 0 0 3px rgba(51, 32, 20, 0.08);
}

.form-feedback {
  margin-top: 16px;
  font-size: 0.92rem;
  text-align: center;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
  background-color: #22140D;
  color: #ADA097;
  padding: 45px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 16px;
}

.footer-title {
  color: #FFFFFF;
  font-size: 1.15rem;
  letter-spacing: 1.5px;
}

.footer-addr {
  font-size: 0.88rem;
  color: #9E9187;
  margin-top: 4px;
}

.footer-quote {
  font-family: var(--font-serif);
  color: var(--c-gold);
  font-size: 1rem;
}

.footer-copy {
  font-size: 0.82rem;
  color: #7A6E65;
}

/* ==========================================================================
   Responsive (Desktop, Tablet, Mobile)
   ========================================================================== */
@media (max-width: 992px) {
  .hero-title {
    font-size: 3rem;
  }
  .contact-box {
    grid-template-columns: 1fr;
  }
  .material-item,
  .material-item.reverse {
    grid-template-columns: 1fr;
  }
  .material-item.reverse .material-text {
    order: 1;
  }
  .material-item.reverse .material-visual {
    order: 2;
  }
  .material-visual {
    min-height: 280px;
  }
}

@media (max-width: 768px) {
  .section-padding {
    padding: 70px 0;
  }

  .hamburger {
    display: flex;
  }

  .nav {
    position: fixed;
    top: 76px;
    right: -100%;
    width: 80%;
    max-width: 340px;
    height: calc(100vh - 76px);
    background-color: #FAF8F2;
    box-shadow: -8px 0 28px rgba(0, 0, 0, 0.12);
    transition: var(--transition);
    padding: 35px 25px;
  }

  .nav.active {
    right: 0;
  }

  .nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: 22px;
  }

  .nav-btn {
    width: 100%;
    text-align: center;
  }

  .hero {
    min-height: 85vh;
  }

  .hero-title {
    font-size: 2.4rem;
  }

  .hero-desc {
    font-size: 1rem;
  }

  .contact-info,
  .contact-form-wrap {
    padding: 40px 24px;
  }

  .material-item {
    padding: 28px 20px;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2rem;
  }
  .title {
    font-size: 1.9rem;
  }
  .hero-actions {
    flex-direction: column;
    width: 100%;
  }
  .btn {
    width: 100%;
  }
}