/* ==========================================================================
   PT SENTRA BUANA PRIMA - STYLESHEET
   Corporate, Industrial, Trustworthy & Premium Landing Page Design
   ========================================================================== */

/* --- CSS Variables & Design Tokens --- */
:root {
  /* Brand Palette */
  --color-primary: #0f233a;          /* Deep Corporate Navy */
  --color-primary-dark: #091524;     /* Midnight Navy */
  --color-primary-light: #1e3a5f;    /* Steel Blue */
  --color-accent: #0284c7;           /* Industrial Precision Blue */
  --color-accent-hover: #0369a1;
  --color-gold: #c2881b;             /* Corporate Bronze Gold */
  --color-gold-light: #fef3c7;
  
  /* Neutrals & Surfaces */
  --color-bg: #f8fafc;              /* Slate 50 */
  --color-surface: #ffffff;         /* Pure White */
  --color-surface-subtle: #f1f5f9;  /* Slate 100 */
  --color-surface-dark: #0b1727;    /* Slate Dark for Callouts */
  --color-border: #e2e8f0;          /* Slate 200 */
  --color-border-subtle: #edf2f7;
  --color-border-dark: #1e293b;
  
  /* Typography Colors */
  --color-text-main: #0f172a;       /* Slate 900 */
  --color-text-muted: #475569;      /* Slate 600 */
  --color-text-subtle: #64748b;     /* Slate 500 */
  --color-text-inverse: #f8fafc;    /* White/Slate on dark */
  
  /* Typography Families */
  --font-main: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-heading: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-display: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
  
  /* Elevations & Shadows */
  --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.05);
  --shadow-sm: 0 2px 4px rgba(15, 23, 42, 0.06), 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.08), 0 2px 4px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 12px 24px -4px rgba(15, 23, 42, 0.1), 0 4px 8px -2px rgba(15, 23, 42, 0.05);
  --shadow-xl: 0 20px 30px -6px rgba(15, 23, 42, 0.14), 0 8px 12px -4px rgba(15, 23, 42, 0.08);
  
  /* Border Radii */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  
  /* Layout Transitions */
  --transition-fast: 0.18s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.28s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

/* --- Base & Reset --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-main);
  background-color: var(--color-bg);
  color: var(--color-text-main);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

button, input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

ul {
  list-style: none;
}

/* --- Layout Container --- */
.container {
  width: 100%;
  max-width: 1240px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

/* --- Section Structure --- */
.section {
  padding: 6rem 0;
  position: relative;
}

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

.section-header {
  max-width: 760px;
  margin: 0 auto 3.5rem auto;
}

.section-tag {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  background-color: rgba(2, 132, 199, 0.08);
  border: 1px solid rgba(2, 132, 199, 0.18);
  padding: 0.35rem 0.9rem;
  border-radius: var(--radius-full);
  margin-bottom: 1rem;
}

.section-title {
  font-family: var(--font-heading);
  font-size: 2.25rem;
  font-weight: 800;
  line-height: 1.25;
  color: var(--color-primary-dark);
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.section-lead {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--color-primary-light);
  line-height: 1.6;
  margin-bottom: 1.25rem;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.75rem 1.4rem;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-normal);
  text-align: center;
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--color-primary);
  color: #ffffff;
  border-color: var(--color-primary);
  box-shadow: 0 2px 6px rgba(15, 35, 58, 0.2);
}

.btn-primary:hover {
  background-color: var(--color-primary-light);
  border-color: var(--color-primary-light);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(15, 35, 58, 0.25);
  color: #ffffff;
}

.btn-secondary {
  background-color: #ffffff;
  color: var(--color-primary-dark);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-xs);
}

.btn-secondary:hover {
  background-color: var(--color-surface-subtle);
  border-color: var(--color-text-subtle);
  transform: translateY(-1px);
}

.btn-white {
  background-color: #ffffff;
  color: var(--color-primary-dark);
  border-color: #ffffff;
  font-weight: 700;
}

.btn-white:hover {
  background-color: #f1f5f9;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-outline-white {
  background-color: transparent;
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.4);
}

.btn-outline-white:hover {
  background-color: rgba(255, 255, 255, 0.12);
  border-color: #ffffff;
  transform: translateY(-1px);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-border);
}

.btn-outline:hover {
  background-color: var(--color-surface-subtle);
  border-color: var(--color-primary);
}

.btn-lg {
  padding: 0.95rem 1.85rem;
  font-size: 1.05rem;
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

.btn-block {
  display: flex;
  width: 100%;
}

/* ==========================================================================
   Top Announcement Bar
   ========================================================================== */
.top-bar {
  background-color: var(--color-primary-dark);
  color: #94a3b8;
  font-size: 0.8125rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding: 0.45rem 0;
}

.top-bar-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.top-bar-contact {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  flex-wrap: wrap;
}

.top-bar-contact span,
.top-bar-contact a,
.top-bar-phone a {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.top-bar-contact a:hover,
.top-bar-phone a:hover {
  color: #ffffff;
}

.top-bar .divider {
  color: rgba(255, 255, 255, 0.2);
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.main-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: all var(--transition-normal);
}

.main-header.scrolled {
  box-shadow: var(--shadow-md);
  background-color: rgba(255, 255, 255, 0.98);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.75rem;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.logo-mark {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.1rem;
  letter-spacing: 0.05em;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.15);
  box-shadow: 0 2px 6px rgba(15, 35, 58, 0.25);
  flex-shrink: 0;
}

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

.logo-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: 0.03em;
  color: var(--color-primary-dark);
  line-height: 1.2;
}

.logo-tagline {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--color-text-subtle);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.nav-menu {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.nav-link {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-text-muted);
  position: relative;
  padding: 0.4rem 0;
}

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

.nav-link.active {
  color: var(--color-accent);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-accent);
  transition: width var(--transition-fast);
}

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

.nav-cta-mobile {
  display: none;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.btn-nav-cta {
  font-size: 0.875rem;
  padding: 0.55rem 1.25rem;
}

.menu-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.5rem;
  cursor: pointer;
  flex-direction: column;
  gap: 5px;
}

.hamburger-bar {
  width: 22px;
  height: 2px;
  background-color: var(--color-primary-dark);
  transition: all var(--transition-fast);
}

/* ==========================================================================
   1. Hero Section
   ========================================================================== */
.hero-section {
  position: relative;
  background: linear-gradient(180deg, #ffffff 0%, #f1f5f9 100%);
  padding: 5rem 0 6rem 0;
  overflow: hidden;
  border-bottom: 1px solid var(--color-border);
}

.hero-backdrop-glow {
  position: absolute;
  top: -15%;
  right: -5%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(2, 132, 199, 0.08) 0%, rgba(255, 255, 255, 0) 70%);
  pointer-events: none;
  z-index: 1;
}

.hero-container {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3.5rem;
  align-items: center;
  position: relative;
  z-index: 2;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: rgba(15, 35, 58, 0.06);
  border: 1px solid rgba(15, 35, 58, 0.12);
  color: var(--color-primary);
  font-size: 0.8125rem;
  font-weight: 700;
  padding: 0.4rem 0.95rem;
  border-radius: var(--radius-full);
  margin-bottom: 1.5rem;
}

.badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.2);
}

.hero-title {
  font-family: var(--font-heading);
  font-size: 3.15rem;
  font-weight: 800;
  line-height: 1.15;
  color: var(--color-primary-dark);
  letter-spacing: -0.025em;
  margin-bottom: 1.5rem;
}

.hero-description {
  font-size: 1.15rem;
  color: var(--color-text-muted);
  line-height: 1.65;
  margin-bottom: 2.25rem;
  max-width: 580px;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 3rem;
  flex-wrap: wrap;
}

.hero-highlights {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
}

.highlight-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.highlight-icon {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  box-shadow: var(--shadow-xs);
  flex-shrink: 0;
}

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

.highlight-text strong {
  font-size: 0.9rem;
  color: var(--color-primary-dark);
  line-height: 1.2;
}

.highlight-text span {
  font-size: 0.75rem;
  color: var(--color-text-subtle);
  line-height: 1.3;
}

/* Hero Visual Card */
.hero-visual {
  position: relative;
}

.hero-image-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: visible;
  box-shadow: var(--shadow-xl);
}

.hero-img {
  width: 100%;
  height: 480px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(15, 35, 58, 0.15);
}

.hero-floating-badge {
  position: absolute;
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  padding: 0.85rem 1.15rem;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  gap: 0.85rem;
  box-shadow: var(--shadow-lg);
  z-index: 3;
}

.top-floating {
  top: -20px;
  left: -20px;
}

.bottom-floating {
  bottom: -20px;
  right: -20px;
}

.floating-icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: rgba(2, 132, 199, 0.12);
  color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.floating-icon.gold-accent {
  background-color: rgba(194, 136, 27, 0.15);
  color: var(--color-gold);
}

.floating-title {
  display: block;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-primary-dark);
}

.floating-sub {
  display: block;
  font-size: 0.75rem;
  color: var(--color-text-subtle);
}

/* ==========================================================================
   2. About Section
   ========================================================================== */
.about-section {
  background-color: #ffffff;
  border-bottom: 1px solid var(--color-border);
}

.about-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 4rem;
  align-items: start;
}

.about-text {
  font-size: 1rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 2.25rem;
}

.about-pillars {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.pillar-card {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.15rem;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.pillar-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

.pillar-num {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1rem;
  color: var(--color-accent);
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.pillar-content h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 0.25rem;
}

.pillar-content p {
  font-size: 0.8125rem;
  color: var(--color-text-subtle);
  line-height: 1.45;
}

/* About Side Box */
.overview-box {
  background: linear-gradient(180deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: #ffffff;
  padding: 2.25rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  border: 1px solid rgba(255, 255, 255, 0.1);
  position: sticky;
  top: 6rem;
}

.overview-header {
  margin-bottom: 1.75rem;
}

.overview-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-gold-light);
  background-color: rgba(194, 136, 27, 0.2);
  border: 1px solid rgba(194, 136, 27, 0.4);
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  margin-bottom: 0.75rem;
}

.overview-header h3 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: #ffffff;
}

.overview-checklist {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.overview-checklist li {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  font-size: 0.9rem;
  color: #cbd5e1;
  line-height: 1.5;
}

.overview-checklist svg {
  color: #38bdf8;
  flex-shrink: 0;
  margin-top: 2px;
}

.overview-checklist strong {
  color: #ffffff;
}

.overview-cta {
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding-top: 1.5rem;
  text-align: center;
}

.overview-cta p {
  font-size: 0.875rem;
  color: #94a3b8;
  margin-bottom: 1rem;
}

.overview-cta .btn-primary {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
}

.overview-cta .btn-primary:hover {
  background-color: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
}

/* ==========================================================================
   3. Business Activities Section
   ========================================================================== */
.activities-section {
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.activities-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

.activity-card {
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2.25rem 2rem;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  position: relative;
}

.activity-card:hover {
  border-color: #93c5fd;
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.activity-icon-wrap {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-md);
  background-color: rgba(15, 35, 58, 0.05);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  border: 1px solid var(--color-border);
  transition: all var(--transition-fast);
}

.activity-card:hover .activity-icon-wrap {
  background-color: var(--color-primary);
  color: #ffffff;
  border-color: var(--color-primary);
}

.activity-title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  line-height: 1.35;
  margin-bottom: 0.85rem;
}

.activity-summary {
  font-size: 0.925rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.activity-points {
  border-top: 1px solid var(--color-border-subtle);
  padding-top: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.activity-points li {
  font-size: 0.85rem;
  color: var(--color-text-main);
  position: relative;
  padding-left: 1.25rem;
}

.activity-points li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.5rem;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-accent);
}

/* Featured / Highlight cards in activities */
.featured-activity {
  border-top: 3px solid var(--color-accent);
}

.highlight-box-card {
  grid-column: span 3;
  background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
  border: 1px solid #cbd5e1;
  border-left: 4px solid var(--color-primary);
}

.highlight-box-card .activity-points {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 0.75rem;
}

/* ==========================================================================
   4. Products & Supply Categories
   ========================================================================== */
.products-section {
  background-color: #ffffff;
  border-bottom: 1px solid var(--color-border);
}

.categories-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-bottom: 3.5rem;
}

.category-card {
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
}

.category-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: #94a3b8;
  transform: translateY(-4px);
}

.cat-image-wrap {
  position: relative;
  height: 180px;
  overflow: hidden;
  background-color: #0f172a;
}

.cat-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-smooth);
}

.category-card:hover .cat-image {
  transform: scale(1.05);
}

.cat-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.1) 0%, rgba(15, 23, 42, 0.6) 100%);
}

.cat-badge {
  position: absolute;
  bottom: 0.75rem;
  left: 0.75rem;
  background-color: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(4px);
  color: #ffffff;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.cat-body {
  padding: 1.5rem 1.25rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.cat-title {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 0.65rem;
  line-height: 1.35;
}

.cat-desc {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.55;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.cat-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  padding-top: 0.85rem;
  border-top: 1px solid var(--color-border-subtle);
}

.tag {
  font-size: 0.725rem;
  font-weight: 600;
  color: var(--color-primary-light);
  background-color: var(--color-surface-subtle);
  border: 1px solid var(--color-border);
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-sm);
}

/* Sourcing Callout Notice */
.sourcing-callout {
  background: linear-gradient(135deg, #f8fafc 0%, #edf2f7 100%);
  border: 1px solid #cbd5e1;
  border-radius: var(--radius-lg);
  padding: 2rem 2.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  box-shadow: var(--shadow-sm);
}

.sourcing-callout-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background-color: #ffffff;
  color: var(--color-accent);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: var(--shadow-xs);
}

.sourcing-callout-content {
  flex-grow: 1;
}

.sourcing-callout-content h3 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 0.35rem;
}

.sourcing-callout-content p {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

.sourcing-callout-btn {
  flex-shrink: 0;
}

/* ==========================================================================
   5. Why Work With Us Section
   ========================================================================== */
.why-section {
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.why-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.why-card {
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem 1.75rem;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.why-card:hover {
  border-color: var(--color-primary-light);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.why-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background-color: rgba(2, 132, 199, 0.08);
  color: var(--color-accent);
  border: 1px solid rgba(2, 132, 199, 0.18);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  transition: all var(--transition-fast);
}

.why-card:hover .why-icon {
  background-color: var(--color-accent);
  color: #ffffff;
  border-color: var(--color-accent);
}

.why-title {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  line-height: 1.35;
  margin-bottom: 0.85rem;
}

.why-text {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ==========================================================================
   6. Procurement CTA Banner
   ========================================================================== */
.procurement-cta-section {
  background-color: var(--color-primary-dark);
  padding: 5rem 0;
  position: relative;
  overflow: hidden;
}

.cta-inner-card {
  text-align: center;
  max-width: 840px;
  margin: 0 auto;
  position: relative;
  z-index: 2;
}

.cta-badge {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #38bdf8;
  background-color: rgba(56, 189, 248, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.3);
  padding: 0.35rem 0.9rem;
  border-radius: var(--radius-full);
  margin-bottom: 1.25rem;
}

.cta-title {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 800;
  color: #ffffff;
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin-bottom: 1.25rem;
}

.cta-text {
  font-size: 1.15rem;
  color: #cbd5e1;
  line-height: 1.65;
  margin-bottom: 2.5rem;
}

.cta-buttons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}

/* ==========================================================================
   7. Contact Section
   ========================================================================== */
.contact-section {
  background-color: #ffffff;
  border-bottom: 1px solid var(--color-border);
}

.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.25fr;
  gap: 3.5rem;
  align-items: start;
}

/* Contact Info Card */
.contact-info-card {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-sm);
}

.contact-card-header {
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 1.5rem;
}

.contact-corp-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  background-color: rgba(2, 132, 199, 0.08);
  border: 1px solid rgba(2, 132, 199, 0.2);
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  margin-bottom: 0.75rem;
}

.contact-card-header h3 {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--color-primary-dark);
  margin-bottom: 0.35rem;
}

.contact-card-header p {
  font-size: 0.85rem;
  color: var(--color-text-subtle);
}

.contact-detail-items {
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
  margin-bottom: 2rem;
}

.detail-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.detail-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: var(--shadow-xs);
}

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

.detail-text strong {
  font-size: 0.925rem;
  color: var(--color-primary-dark);
  margin-bottom: 0.25rem;
}

.detail-text address {
  font-style: normal;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

.contact-link {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-accent);
  transition: color var(--transition-fast);
}

.contact-link:hover {
  color: var(--color-accent-hover);
  text-decoration: underline;
}

.detail-sub {
  font-size: 0.775rem;
  color: var(--color-text-subtle);
  margin-top: 0.2rem;
}

.contact-map-card {
  border-top: 1px solid var(--color-border);
  padding-top: 1.5rem;
}

.map-btn {
  font-weight: 600;
  background-color: #ffffff;
}

/* Contact Direct Email Channels Card */
.contact-channels-card {
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.channels-header {
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 1.25rem;
}

.channels-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  background-color: rgba(2, 132, 199, 0.08);
  border: 1px solid rgba(2, 132, 199, 0.2);
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  margin-bottom: 0.75rem;
}

.channels-header h3 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-primary-dark);
  margin-bottom: 0.4rem;
}

.channels-header p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.55;
}

.highlight-email {
  color: var(--color-accent);
  font-weight: 700;
  text-decoration: underline;
}

.email-channels-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.channel-card {
  display: flex;
  align-items: center;
  gap: 1.15rem;
  padding: 1.15rem 1.25rem;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
}

.channel-card:hover {
  background-color: #ffffff;
  border-color: var(--color-accent);
  box-shadow: var(--shadow-md);
  transform: translateX(4px);
}

.channel-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all var(--transition-fast);
}

.channel-card:hover .channel-icon {
  background-color: var(--color-primary);
  color: #ffffff;
  border-color: var(--color-primary);
}

.channel-body {
  flex-grow: 1;
}

.channel-body h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 0.2rem;
  line-height: 1.3;
}

.channel-body p {
  font-size: 0.8125rem;
  color: var(--color-text-subtle);
  line-height: 1.4;
}

.channel-arrow {
  color: var(--color-text-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition-fast), color var(--transition-fast);
}

.channel-card:hover .channel-arrow {
  color: var(--color-accent);
  transform: translateX(3px);
}

.direct-email-main-btn {
  padding-top: 0.5rem;
}

/* ==========================================================================
   8. Footer
   ========================================================================== */
.site-footer {
  background-color: var(--color-primary-dark);
  color: #94a3b8;
  padding: 5rem 0 2rem 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-top {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 1fr 1.2fr;
  gap: 3rem;
  padding-bottom: 3.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand .footer-logo .logo-mark {
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-primary-light) 100%);
}

.footer-brand .logo-name {
  color: #ffffff;
}

.footer-brand .logo-tagline {
  color: #94a3b8;
}

.footer-summary {
  font-size: 0.875rem;
  line-height: 1.65;
  margin-top: 1.25rem;
  color: #94a3b8;
  max-width: 320px;
}

.footer-title {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: 0.02em;
  margin-bottom: 1.25rem;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.footer-links a {
  font-size: 0.85rem;
  color: #94a3b8;
}

.footer-links a:hover {
  color: #ffffff;
  padding-left: 3px;
}

.footer-contact-info {
  font-size: 0.85rem;
  line-height: 1.6;
}

.footer-contact-info p {
  margin-bottom: 0.75rem;
}

.footer-contact-info strong {
  color: #e2e8f0;
}

.footer-contact-line a {
  color: #38bdf8;
}

.footer-contact-line a:hover {
  color: #ffffff;
  text-decoration: underline;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 2rem;
  font-size: 0.8125rem;
  color: #64748b;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-terms span {
  letter-spacing: 0.04em;
}

/* ==========================================================================
   Floating Action Buttons & Back to Top
   ========================================================================== */
.floating-contact-btn {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 99;
  background-color: #25d366;
  color: #ffffff;
  width: 54px;
  height: 54px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-xl);
  transition: transform var(--transition-fast), background-color var(--transition-fast);
}

.floating-contact-btn:hover {
  background-color: #20ba5a;
  transform: scale(1.08);
}

.floating-tooltip {
  position: absolute;
  right: 64px;
  background-color: var(--color-primary-dark);
  color: #ffffff;
  font-size: 0.775rem;
  font-weight: 600;
  white-space: nowrap;
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-sm);
  pointer-events: none;
  opacity: 0;
  transform: translateX(10px);
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-md);
}

.floating-contact-btn:hover .floating-tooltip {
  opacity: 1;
  transform: translateX(0);
}

.back-to-top {
  position: fixed;
  bottom: 6rem;
  right: 2.25rem;
  z-index: 98;
  background-color: #ffffff;
  color: var(--color-primary-dark);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-fast);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background-color: var(--color-primary);
  color: #ffffff;
  border-color: var(--color-primary);
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
/* ==========================================================================
   Responsive Breakpoints & Mobile Optimization
   ========================================================================== */

/* Medium Devices (Tablets, small laptops: 769px - 1024px) */
@media (max-width: 1024px) {
  .hero-title {
    font-size: 2.65rem;
  }
  
  .hero-container {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  
  .hero-img {
    height: 380px;
  }
  
  .about-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  
  .about-pillars {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .activities-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .highlight-box-card {
    grid-column: span 2;
  }
  
  .categories-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .why-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .contact-layout {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  
  .footer-top {
    grid-template-columns: repeat(2, 1fr);
    gap: 2.5rem;
  }
}

/* Small Devices (Mobile Phones & Tablets: up to 768px) */
@media (max-width: 768px) {
  .container {
    padding-left: 1.25rem;
    padding-right: 1.25rem;
  }

  /* Top Announcement Bar */
  .top-bar {
    padding: 0.6rem 0;
  }
  
  .top-bar-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.4rem;
  }
  
  .top-bar-contact {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.35rem;
  }
  
  .top-bar .divider {
    display: none;
  }

  /* Header & Navigation Drawer */
  .nav-container {
    height: 4.25rem;
  }

  .logo-name {
    font-size: 1.05rem;
  }

  .logo-tagline {
    font-size: 0.65rem;
  }

  .nav-menu {
    position: fixed;
    top: 4.25rem;
    left: 0;
    width: 100%;
    height: calc(100vh - 4.25rem);
    background-color: #ffffff;
    flex-direction: column;
    padding: 2rem 1.5rem;
    box-shadow: var(--shadow-xl);
    transform: translateX(-100%);
    transition: transform var(--transition-normal);
    overflow-y: auto;
    align-items: stretch;
    z-index: 999;
  }
  
  .nav-menu.open {
    transform: translateX(0);
  }
  
  .nav-list {
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    gap: 0.5rem;
  }
  
  .nav-link {
    font-size: 1.1rem;
    width: 100%;
    display: block;
    padding: 0.85rem 0.5rem;
    border-bottom: 1px solid var(--color-border-subtle);
  }
  
  .nav-cta-mobile {
    display: block;
    width: 100%;
    margin-top: 1.75rem;
  }

  .nav-cta-mobile .btn {
    width: 100%;
    padding: 0.85rem;
    font-size: 1rem;
  }
  
  .btn-nav-cta {
    display: none;
  }
  
  .menu-toggle {
    display: flex;
    width: 42px;
    height: 42px;
    align-items: center;
    justify-content: center;
  }
  
  .menu-toggle.open .hamburger-bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  
  .menu-toggle.open .hamburger-bar:nth-child(2) {
    opacity: 0;
  }
  
  .menu-toggle.open .hamburger-bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  /* Hero Section */
  .hero-section {
    padding: 3.5rem 0 4.5rem 0;
  }

  .hero-title {
    font-size: 2.15rem;
    line-height: 1.2;
  }

  .hero-description {
    font-size: 1.05rem;
    margin-bottom: 1.75rem;
  }

  .hero-cta-group {
    flex-direction: column;
    align-items: stretch;
    gap: 0.85rem;
    margin-bottom: 2.5rem;
  }

  .hero-cta-group .btn {
    width: 100%;
    justify-content: center;
  }
  
  .hero-highlights {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .hero-img {
    height: 300px;
  }
  
  .hero-floating-badge {
    position: static;
    margin-top: 0.85rem;
    box-shadow: var(--shadow-sm);
  }

  /* General Section Padding */
  .section {
    padding: 4rem 0;
  }

  .section-header {
    margin-bottom: 2.5rem;
  }
  
  .section-title {
    font-size: 1.85rem;
  }

  .section-subtitle {
    font-size: 1rem;
  }

  /* About Section */
  .about-pillars {
    grid-template-columns: 1fr;
  }

  .overview-box {
    padding: 1.75rem 1.25rem;
    position: static;
  }

  /* Activities Section */
  .activities-grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }
  
  .activity-card {
    padding: 1.75rem 1.25rem;
  }

  .highlight-box-card {
    grid-column: span 1;
  }

  .highlight-box-card .activity-points {
    grid-template-columns: 1fr;
  }

  /* Categories Section */
  .categories-grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
    margin-bottom: 2.5rem;
  }

  .cat-image-wrap {
    height: 200px;
  }

  .sourcing-callout {
    flex-direction: column;
    align-items: stretch;
    padding: 1.5rem;
    gap: 1.25rem;
    text-align: center;
  }

  .sourcing-callout-icon {
    margin: 0 auto;
  }

  .sourcing-callout-btn .btn {
    width: 100%;
  }

  /* Why Us Section */
  .why-grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }

  .why-card {
    padding: 1.75rem 1.25rem;
  }

  /* Procurement CTA Banner */
  .procurement-cta-section {
    padding: 4rem 0;
  }
  
  .cta-title {
    font-size: 1.85rem;
  }

  .cta-text {
    font-size: 1.05rem;
    margin-bottom: 2rem;
  }

  .cta-buttons {
    flex-direction: column;
    align-items: stretch;
    gap: 0.85rem;
  }

  .cta-buttons .btn {
    width: 100%;
  }

  /* Contact Section */
  .contact-info-card,
  .contact-channels-card {
    padding: 1.75rem 1.25rem;
  }

  .channel-card {
    padding: 1rem;
    gap: 0.85rem;
  }

  .channel-icon {
    width: 38px;
    height: 38px;
  }

  /* Footer */
  .site-footer {
    padding: 4rem 0 2rem 0;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 2rem;
    padding-bottom: 2.5rem;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  /* Floating UI Elements */
  .floating-contact-btn {
    bottom: 1.25rem;
    right: 1.25rem;
    width: 48px;
    height: 48px;
  }

  .back-to-top {
    bottom: 5rem;
    right: 1.35rem;
    width: 40px;
    height: 40px;
  }
  
  .floating-tooltip {
    display: none;
  }
}

/* Extra Small Devices (Phones: up to 480px) */
@media (max-width: 480px) {
  .logo-mark {
    width: 38px;
    height: 38px;
    font-size: 0.95rem;
  }

  .logo-name {
    font-size: 0.95rem;
  }

  .hero-title {
    font-size: 1.85rem;
  }

  .section-title {
    font-size: 1.6rem;
  }

  .hero-badge {
    font-size: 0.75rem;
    padding: 0.35rem 0.75rem;
  }

  .cta-title {
    font-size: 1.6rem;
  }
}