/* ══ STRATEGY CONSULTING — ZEN-MINIMAL ══ */
/* Font: Cormorant Garamond (heading) + DM Sans (body) | Tone: near-monochrome, whitespace | Identity: ZEN-MINIMAL */
/* Accent: Sage Green #6b8067 | Nav: Underline-Active only (Nav-8) | Hero: Centered Minimal (H4) */
/* Prefix class: sc- (strategy-consulting) */

@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,500;1,300;1,400&family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;1,9..40,300&display=swap');

:root {
  --bg: #fdfcfb;
  --surface: #fff;
  --dark: #0d0c0a;
  --dark2: #1a1915;
  --border: #e0dcd5;
  --border-light: #ede9e2;
  --text: #1a1815;
  --text-2: #4a4740;
  --text-3: #9a9590;
  --accent: #5a7355;
  --accent-h: #4a6045;
  --accent-light: #e6f0e3;
  --accent-mid: #7a9575;
  --warm: #faf8f5;
  --warm2: #ece9e3;
  --danger: #c65a3f;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, .08);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, .12);
  --heading-font: 'Cormorant Garamond', Georgia, serif;
  --body-font: 'DM Sans', sans-serif;
}

html { scroll-behavior: smooth; }
body {
  font-family: var(--body-font);
  background: var(--bg);
  color: var(--text);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

*, *::before, *::after { box-sizing: border-box; }
img { display: block; max-width: 100%; }
a { text-decoration: none; color: inherit; }

::-webkit-scrollbar { width: 3px; }
::-webkit-scrollbar-thumb { background: var(--border); }

/* Layout */
.wd-container { max-width: 1100px; margin: 0 auto; padding: 0 clamp(20px, 5vw, 80px); }
.sc-sec-pad { padding: clamp(100px, 12vw, 160px) 0; }

/* Reveal */
[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .8s cubic-bezier(.25, .8, .25, 1), transform .8s cubic-bezier(.25, .8, .25, 1);
}

[data-reveal].visible { opacity: 1; transform: none; }
[data-reveal][data-delay="1"] { transition-delay: .1s; }
[data-reveal][data-delay="2"] { transition-delay: .2s; }
[data-reveal][data-delay="3"] { transition-delay: .3s; }

/* Section header */
.sc-label {
  display: inline-block;
  font-size: 11px;
  font-weight: 400;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 2.2px;
  margin-bottom: 20px;
  font-family: var(--body-font);
}

.sc-title {
  font-family: var(--heading-font);
  font-size: clamp(36px, 4.5vw, 56px);
  font-weight: 300;
  color: var(--text);
  line-height: 1.1;
  letter-spacing: -.8px;
  margin-bottom: 24px;
  font-style: italic;
}

.sc-title em {
  color: var(--accent);
  font-weight: 400;
}

.sc-sub {
  font-size: 15px;
  font-weight: 300;
  color: var(--text-2);
  line-height: 1.9;
  max-width: 560px;
  margin: 0 auto;
}

/* NAV — Underline-Active */
#nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 500;
  background: var(--surface);
  border-bottom: none;
  padding: 0;
  opacity: 0.5;
  transition: opacity .3s ease-out;
}

.sc-nav-inner {
  height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}

.sc-logo {
  font-family: var(--heading-font);
  font-size: 20px;
  font-weight: 400;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -.3px;
  flex-shrink: 0;
  font-style: italic;
}

.sc-logo span {
  color: var(--accent);
  font-weight: 500;
}

.sc-nav-links {
  display: flex;
  gap: 40px;
  align-items: center;
}

.sc-nav-links a {
  font-size: 13px;
  color: var(--text-2);
  text-decoration: none;
  transition: color .2s;
  font-weight: 400;
  position: relative;
  padding-bottom: 4px;
}

.sc-nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .25s;
}

.sc-nav-links a:hover,
.sc-nav-links a.active {
  color: var(--text);
}

.sc-nav-links a:hover::after,
.sc-nav-links a.active::after {
  transform: scaleX(1);
}

.sc-nav-cta {
  font-size: 13px;
  font-weight: 400;
  background: transparent;
  color: var(--text);
  padding: 9px 22px;
  border: 1px solid var(--text-2);
  border-radius: 6px;
  cursor: pointer;
  font-family: var(--body-font);
  transition: all .2s;
  text-decoration: none;
}

.sc-nav-cta:hover {
  background: var(--accent-light);
  border-color: var(--accent);
  color: var(--accent);
}

.sc-nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  border: none;
  background: transparent;
}

.sc-nav-hamburger span {
  display: block;
  width: 20px;
  height: 1.5px;
  background: var(--text);
  transition: all .3s;
}

.sc-nav-hamburger.open span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.sc-nav-hamburger.open span:nth-child(2) {
  opacity: 0;
}

.sc-nav-hamburger.open span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.sc-nav-mobile {
  position: fixed;
  inset: 0;
  background: var(--surface);
  z-index: 490;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 24px;
  opacity: 0;
  pointer-events: none;
  transition: opacity .3s;
  padding-top: 70px;
}

.sc-nav-mobile.open {
  opacity: 1;
  pointer-events: auto;
}

.sc-nav-mobile a {
  font-size: 18px;
  font-weight: 400;
  color: var(--text-2);
  text-decoration: none;
  transition: color .2s;
}

.sc-nav-mobile a:hover {
  color: var(--accent);
}

.sc-nav-mobile .nm-cta {
  font-size: 13px;
  background: var(--accent-light);
  color: var(--accent);
  padding: 10px 28px;
  border: 1px solid var(--accent);
  border-radius: 6px;
  margin-top: 8px;
}

@media (max-width: 768px) {
  .sc-nav-links,
  .sc-nav-cta {
    display: none;
  }

  .sc-nav-hamburger {
    display: flex;
  }
}

/* HERO */
.sc-hero {
  padding: calc(70px + clamp(80px, 12vw, 160px)) 0 clamp(80px, 12vw, 160px);
  text-align: center;
  background: var(--bg);
}

.sc-hero-label {
  font-size: 11px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 24px;
}

.sc-hero-title {
  font-family: var(--heading-font);
  font-size: clamp(48px, 6vw, 72px);
  font-weight: 300;
  color: var(--text);
  line-height: 1.05;
  letter-spacing: -1px;
  margin-bottom: 28px;
  font-style: italic;
}

.sc-hero-title em {
  color: var(--accent);
  font-weight: 400;
}

.sc-hero-sub {
  font-size: clamp(15px, 1.5vw, 18px);
  font-weight: 300;
  color: var(--text-2);
  line-height: 1.8;
  max-width: 620px;
  margin: 0 auto 40px;
}

/* PAGE HERO */
.page-hero {
  padding: calc(70px + clamp(60px, 8vw, 100px)) 0 clamp(60px, 8vw, 100px);
  background: var(--bg);
  text-align: center;
  border-bottom: 1px solid var(--border-light);
}

.ph-label {
  font-size: 11px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 16px;
}

.ph-title {
  font-family: var(--heading-font);
  font-size: clamp(40px, 5vw, 56px);
  font-weight: 300;
  color: var(--text);
  line-height: 1.1;
  letter-spacing: -.8px;
  margin-bottom: 16px;
  font-style: italic;
}

.ph-title em {
  color: var(--accent);
  font-weight: 400;
}

.ph-sub {
  font-size: clamp(14px, 1.4vw, 16px);
  font-weight: 300;
  color: var(--text-2);
  max-width: 540px;
  margin: 0 auto;
  line-height: 1.8;
}

/* BUTTONS */
.btn-sc {
  font-size: 13px;
  font-weight: 500;
  background: linear-gradient(135deg, var(--accent), var(--accent-h));
  color: #fff;
  padding: 12px 32px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-family: var(--body-font);
  transition: all .3s cubic-bezier(.16, 1, .3, 1);
  text-decoration: none;
  display: inline-block;
  box-shadow: 0 4px 12px rgba(90, 115, 85, .2);
  position: relative;
}

.btn-sc::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,.2), transparent);
  border-radius: 8px;
  pointer-events: none;
}

.btn-sc:hover {
  background: linear-gradient(135deg, var(--accent-h), #4a6045);
  box-shadow: 0 8px 20px rgba(90, 115, 85, .35);
  transform: translateY(-2px);
}

/* FEATURE GRID */
.sc-feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: clamp(48px, 8vw, 80px);
}

.sc-feature-item {
  text-align: center;
  padding: 32px 24px;
  background: linear-gradient(135deg, rgba(255,255,255,.6), rgba(232,242,230,.3));
  border: 1px solid var(--border-light);
  border-radius: 12px;
  transition: all .3s cubic-bezier(.16, 1, .3, 1);
  box-shadow: var(--shadow-sm);
}

.sc-feature-item:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--accent);
  transform: translateY(-4px);
  background: linear-gradient(135deg, rgba(255,255,255,.8), rgba(232,242,230,.5));
}

.sc-feature-icon {
  font-size: 48px;
  margin-bottom: 24px;
}

.sc-feature-title {
  font-family: var(--heading-font);
  font-size: 22px;
  font-weight: 300;
  color: var(--text);
  margin-bottom: 12px;
  font-style: italic;
}

.sc-feature-desc {
  font-size: 14px;
  font-weight: 300;
  color: var(--text-2);
  line-height: 1.8;
}

/* STATS */
.sc-stats {
  padding: clamp(80px, 12vw, 160px) 0;
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}

.sc-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: clamp(60px, 10vw, 100px);
  text-align: center;
}

@media (max-width: 1024px) {
  .sc-stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .sc-stats-grid {
    grid-template-columns: 1fr;
  }
}

.sc-stat-number {
  font-family: var(--heading-font);
  font-size: clamp(40px, 6vw, 56px);
  font-weight: 300;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 10px;
  font-style: italic;
}

.sc-stat-label {
  font-size: 12px;
  font-weight: 400;
  color: var(--text-2);
  text-transform: uppercase;
  letter-spacing: 1.4px;
}

/* CTA */
.sc-cta-section {
  text-align: center;
  padding: clamp(80px, 12vw, 160px) 0;
  border-top: 1px solid var(--border-light);
}

.sc-cta-title {
  font-family: var(--heading-font);
  font-size: clamp(36px, 5vw, 52px);
  font-weight: 300;
  color: var(--text);
  line-height: 1.1;
  margin-bottom: 16px;
  font-style: italic;
}

.sc-cta-sub {
  font-size: 15px;
  font-weight: 300;
  line-height: 1.8;
  color: var(--text-2);
  max-width: 540px;
  margin: 0 auto 32px;
}

/* FOOTER */
footer {
  background: var(--dark);
  color: #fff;
  padding: clamp(80px, 12vw, 160px) 0 40px;
  border-top: 1px solid var(--border);
}

.sc-footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: clamp(60px, 10vw, 100px);
  margin-bottom: 60px;
}

.sc-footer-brand h3 {
  font-family: var(--heading-font);
  font-size: 20px;
  font-weight: 300;
  margin-bottom: 12px;
  font-style: italic;
}

.sc-footer-brand p {
  font-size: 13px;
  font-weight: 300;
  line-height: 1.8;
  opacity: .65;
  max-width: 280px;
}

.sc-footer-links h4 {
  font-size: 11px;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 20px;
  color: var(--accent-mid);
}

.sc-footer-links ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.sc-footer-links li {
  margin-bottom: 12px;
}

.sc-footer-links a {
  font-size: 13px;
  font-weight: 300;
  color: rgba(255, 255, 255, .55);
  transition: color .2s;
}

.sc-footer-links a:hover {
  color: var(--accent-mid);
}

/* CAROUSEL HERO - Fullscreen */
.sc-carousel-hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  overflow: hidden;
}

.sc-carousel-inner {
  position: relative;
  height: 100%;
}

.sc-carousel-slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity .8s ease-in-out;
  display: flex;
  align-items: center;
}

.sc-carousel-slide.active {
  opacity: 1;
}

.sc-carousel-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

/* Dark overlay for text readability */
.sc-carousel-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0, 0, 0, .35) 0%, rgba(0, 0, 0, .15) 100%);
  z-index: 1;
}

/* Slide 1: Strategy - Business Meeting Planning */
.sc-carousel-slide:nth-child(1) .sc-carousel-bg {
  background:
    repeating-linear-gradient(45deg, transparent, transparent 35px, rgba(107, 128, 103, .05) 35px, rgba(107, 128, 103, .05) 70px),
    radial-gradient(circle at 20% 50%, rgba(107, 128, 103, .15) 0%, transparent 50%),
    linear-gradient(135deg, #1a1820 0%, #0f1114 100%);
}

/* Slide 2: Restructuring - Construction/Building Transformation */
.sc-carousel-slide:nth-child(2) .sc-carousel-bg {
  background:
    radial-gradient(circle at 75% 25%, rgba(139, 169, 135, .2) 0%, transparent 50%),
    radial-gradient(circle at 25% 75%, rgba(107, 128, 103, .1) 0%, transparent 50%),
    linear-gradient(135deg, #0f1114 0%, #1a1820 100%);
  background-position: center 40%;
}

/* Slide 3: M&A - Partnership Handshake Collaboration */
.sc-carousel-slide:nth-child(3) .sc-carousel-bg {
  background:
    repeating-linear-gradient(90deg, transparent, transparent 40px, rgba(107, 128, 103, .08) 40px, rgba(107, 128, 103, .08) 80px),
    radial-gradient(circle at 50% 50%, rgba(143, 168, 140, .12) 0%, transparent 50%),
    linear-gradient(135deg, #1a1820 0%, #0f1114 100%);
}

/* Slide 4: Growth - Chart Success Growth Analytics */
.sc-carousel-slide:nth-child(4) .sc-carousel-bg {
  background:
    radial-gradient(circle at 40% 60%, rgba(139, 169, 135, .16) 0%, transparent 50%),
    radial-gradient(circle at 60% 40%, rgba(107, 128, 103, .1) 0%, transparent 50%),
    linear-gradient(to bottom, #1a1820 0%, #0f1114 100%);
}

.sc-carousel-content {
  position: relative;
  z-index: 2;
  max-width: 600px;
  color: #fff;
  padding: calc(56px + 60px) 0 60px;
}

.sc-carousel-label {
  font-size: 13px;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--accent-mid);
  margin-bottom: 20px;
  text-shadow: 0 2px 4px rgba(0, 0, 0, .2);
}

.sc-carousel-title {
  font-family: var(--heading-font);
  font-size: clamp(36px, 6vw, 56px);
  font-weight: 300;
  line-height: 1.2;
  margin-bottom: 24px;
  color: #fff;
  font-style: italic;
  text-shadow: 0 4px 16px rgba(0, 0, 0, .4), 0 2px 8px rgba(0, 0, 0, .3);
}

.sc-carousel-title em {
  font-style: normal;
  font-weight: 400;
  color: var(--accent-mid);
  text-shadow: 0 2px 8px rgba(107, 128, 103, .3);
}

.sc-carousel-sub {
  font-size: clamp(15px, 1.6vw, 18px);
  font-weight: 300;
  color: rgba(255, 255, 255, .85);
  line-height: 1.7;
  margin-bottom: 32px;
  text-shadow: 0 2px 8px rgba(0, 0, 0, .3);
}

.sc-carousel-cta {
  display: inline-flex;
  gap: 16px;
  flex-wrap: wrap;
}

.sc-carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 52px;
  height: 52px;
  background: rgba(255, 255, 255, .1);
  border: 1px solid rgba(255, 255, 255, .2);
  border-radius: 50%;
  cursor: pointer;
  font-size: 20px;
  color: rgba(255, 255, 255, .8);
  z-index: 10;
  transition: all .3s;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(8px);
}

.sc-carousel-btn:hover {
  background: var(--accent-mid);
  border-color: var(--accent-mid);
  color: #fff;
  transform: translateY(-50%) scale(1.1);
}

.sc-carousel-prev {
  left: 40px;
}

.sc-carousel-next {
  right: 40px;
}

.sc-carousel-indicators {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 12px;
  z-index: 10;
}

.sc-carousel-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255, 255, 255, .3);
  border: none;
  cursor: pointer;
  transition: all .3s;
}

.sc-carousel-dot.active {
  background: var(--accent-mid);
  width: 32px;
  border-radius: 6px;
}

@media (max-width: 768px) {
  .sc-carousel-hero {
    height: 90vh;
    min-height: 500px;
  }

  .sc-carousel-content {
    padding: calc(56px + 40px) 0 40px;
  }

  .sc-carousel-btn {
    width: 44px;
    height: 44px;
    font-size: 16px;
  }

  .sc-carousel-prev {
    left: 20px;
  }

  .sc-carousel-next {
    right: 20px;
  }

  .sc-carousel-indicators {
    bottom: 20px;
  }
}

/* ENGAGEMENT MODELS — hình thức hợp tác (thay bảng giá cố định) */
.sc-engage-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border-light);
  border: 1px solid var(--border-light);
}

@media (max-width: 900px) {
  .sc-engage-grid {
    grid-template-columns: 1fr;
  }
}

.sc-engage-card {
  background: var(--surface);
  padding: clamp(36px, 4vw, 48px) clamp(28px, 3vw, 36px);
  display: flex;
  flex-direction: column;
}

.sc-engage-label {
  font-size: 11px;
  font-weight: 400;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 18px;
}

.sc-engage-name {
  font-family: var(--heading-font);
  font-size: 26px;
  font-weight: 300;
  font-style: italic;
  color: var(--text);
  margin-bottom: 16px;
  line-height: 1.2;
}

.sc-engage-desc {
  font-size: 13.5px;
  font-weight: 300;
  color: var(--text-2);
  line-height: 1.8;
  margin-bottom: 24px;
}

.sc-engage-scope {
  list-style: none;
  padding: 0;
  margin: 0 0 32px;
  flex-grow: 1;
}

.sc-engage-scope li {
  font-size: 13px;
  font-weight: 300;
  color: var(--text-2);
  padding: 12px 0;
  border-top: 1px solid var(--border-light);
  line-height: 1.6;
}

.sc-engage-scope li:first-child {
  border-top: none;
  padding-top: 0;
}

.sc-engage-cta {
  font-size: 13px;
  font-weight: 400;
  color: var(--text);
  text-decoration: none;
  border-bottom: 1px solid var(--text);
  padding-bottom: 2px;
  align-self: flex-start;
  transition: color .2s, border-color .2s;
}

.sc-engage-cta:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* FAQ — accordion tối giản (details/summary, không cần JS) */
.sc-faq-item {
  border-bottom: 1px solid var(--border-light);
}

.sc-faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 26px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  font-family: var(--heading-font);
  font-size: 19px;
  font-weight: 400;
  font-style: italic;
  color: var(--text);
  transition: color .2s;
}

.sc-faq-item summary::-webkit-details-marker {
  display: none;
}

.sc-faq-item summary::marker {
  content: '';
}

.sc-faq-item summary:hover {
  color: var(--accent);
}

.sc-faq-icon {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--body-font);
  font-size: 17px;
  font-weight: 300;
  font-style: normal;
  color: var(--text-3);
  transition: transform .3s ease, color .2s;
}

.sc-faq-item[open] summary {
  color: var(--accent);
}

.sc-faq-item[open] .sc-faq-icon {
  transform: rotate(45deg);
  color: var(--accent);
}

.sc-faq-a {
  font-size: 14px;
  font-weight: 300;
  color: var(--text-2);
  line-height: 1.9;
  padding: 0 0 26px;
  max-width: 640px;
}

.sc-footer-maps {
  width: 100%;
  height: 300px;
  margin: 32px 0;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 16px rgba(0, 0, 0, .1);
}

.sc-footer-maps iframe {
  width: 100%;
  height: 100%;
  border: none;
}

.sc-footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .1);
  padding-top: 40px;
  text-align: center;
  font-size: 12px;
  color: rgba(255, 255, 255, .35);
}

/* Zalo */
.zalo-float {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 56px;
  height: 56px;
  background: #0068ff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 100;
  transition: all .3s;
  box-shadow: 0 4px 12px rgba(0, 104, 255, .25);
  text-decoration: none;
}

.zalo-float:hover {
  transform: scale(1.08);
}

.zalo-float svg {
  width: 28px;
  height: 28px;
}

@media (max-width: 768px) {
  .sc-hero {
    padding: calc(70px + 60px) 0 60px;
  }
}