/* --- DESIGN SYSTEM & CSS VARIABLES --- */
:root {
  --color-primary: #004ecc;                  /* Nakatsu Shoukai Blue */
  --color-primary-hover: #003fa8;
  --color-secondary: hsl(16, 90%, 54%);       /* Orange */
  --color-secondary-hover: hsl(16, 95%, 48%);
  
  --color-dark: hsl(220, 15%, 12%);
  --color-dark-light: hsl(220, 10%, 25%);
  --color-light: hsl(30, 15%, 98%);
  --color-light-alt: hsl(220, 15%, 95%);
  --color-white: #ffffff;
  
  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;
  
  --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: all 0.2s ease;
  
  --max-width: 1200px;
  --header-height: 80px;
}

/* --- RESET & BASE STYLES --- */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-dark);
  background-color: var(--color-white);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

button {
  font-family: inherit;
  background: none;
  border: none;
  cursor: pointer;
  outline: none;
}

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

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

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

/* --- MULTI-LINGUAL CONTROLS --- */
.lang-en, .lang-jp {
  display: contents;
}

body.lang-en .lang-jp {
  display: none !important;
}

body.lang-jp .lang-en {
  display: none !important;
}

body.lang-jp .vertical-focus-text .lang-en {
  display: none !important;
}

/* --- HEADER / NAVIGATION --- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background-color: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  z-index: 1000;
  transition: var(--transition-smooth);
}

.header.scrolled {
  height: 70px;
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.03);
  background-color: rgba(255, 255, 255, 0.95);
}

.header-container {
  max-width: var(--max-width);
  height: 100%;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo-group {
  display: flex;
  align-items: center;
}

.logo-img {
  height: 52px;
  width: auto;
  object-fit: contain;
  transition: var(--transition-smooth);
}

.header.scrolled .logo-img {
  height: 44px;
}

.nav-menu {
  display: flex;
  gap: 32px;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-dark);
  position: relative;
  padding: 4px 0;
}

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

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

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

.header-actions {
  display: flex;
  align-items: center;
  gap: 20px;
}

.nav-contact-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 22px;
  background-color: var(--color-primary);
  color: var(--color-white) !important;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 600;
  transition: var(--transition-smooth);
  box-shadow: 0 4px 12px rgba(0, 78, 204, 0.2);
}

.nav-contact-btn:hover {
  background-color: var(--color-primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0, 78, 204, 0.35);
}

.lang-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 600;
}

.lang-btn {
  color: var(--color-dark-light);
  padding: 4px 8px;
  transition: var(--transition-fast);
  border-radius: 4px;
}

.lang-btn:hover {
  color: var(--color-primary);
}

.lang-btn.active {
  color: var(--color-primary);
  font-weight: 800;
  background-color: rgba(0, 78, 204, 0.08);
}

.lang-divider {
  color: var(--color-light-alt);
}

.mobile-menu-toggle {
  display: none;
  font-size: 1.5rem;
  color: var(--color-dark);
}

/* --- HERO SECTION --- */
.hero-section {
  position: relative;
  min-height: 100vh;
  padding-top: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-white);
  overflow: hidden;
}

.hero-background-video {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 1;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(9, 41, 89, 0.15);
  z-index: 2;
}

.hero-content {
  width: 100%;
  max-width: var(--max-width);
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  position: relative;
}

.hero-text-container {
  z-index: 10;
  position: relative;
}

.hero-title {
  color: var(--color-primary);
  font-family: var(--font-heading);
  font-size: 2.2rem;
  font-weight: 700;
  letter-spacing: -1px;
  line-height: 1.2;
  text-transform: uppercase;
}

.hero-title h1 {
  font-weight: 800;
  letter-spacing: -1px;
}

.lang-jp .hero-title {
  color: var(--color-primary);
}

.vertical-focus-text {
  color: var(--color-white);
  font-weight: 600;
  letter-spacing: 1px;
}

.focus-line {
  background-color: var(--color-white);
}

.hero-desc {
  color: white;
  font-size: 1.1rem;
  font-weight: 500;
  letter-spacing: 0.5px;
}

.hero-desc h3 {
  color: white;
  font-weight: 500;
}

.highlight {
  font-weight: 900;
}

/* --- MESSAGE SECTION --- */
.message-section {
  padding: 120px 0;
  background-color: var(--color-white);
}

.section-title {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: 2px;
  margin-bottom: 32px;
  position: relative;
  color: var(--color-dark);
}

.message-text {
  max-width: 800px;
  margin: 0 auto 48px;
  font-size: 1.15rem;
  line-height: 1.85;
  color: var(--color-dark-light);
}

/* --- BUTTONS --- */
.btn-wrapper {
  display: flex;
  justify-content: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  padding: 14px 32px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.5px;
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

.btn-primary {
  background-color: var(--color-dark);
  color: var(--color-white);
}

.btn-primary:hover {
  background-color: var(--color-primary);
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(0, 78, 204, 0.25);
}

.btn-outline-white {
  background-color: transparent;
  color: var(--color-white);
  border: 1.5px solid var(--color-white);
  box-shadow: none;
}

.btn-outline-white:hover {
  background-color: var(--color-white);
  color: var(--color-primary);
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.btn-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.15);
  transition: var(--transition-smooth);
}

.btn-primary:hover .btn-arrow {
  transform: translateX(4px);
  background-color: rgba(255, 255, 255, 0.25);
}

.btn-outline-white:hover .btn-arrow {
  transform: translateX(4px);
  background-color: rgba(0, 78, 204, 0.1);
}

/* --- RECYCLE / INTERACTIVE DIAGRAM SECTION --- */
.diagram-section {
  position: relative;
  padding: 100px 0;
  background-color: var(--color-light);
  overflow: hidden;
}

.diagram-bg-map {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0.04;
  background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="100" height="100" viewBox="0 0 100 100"><circle cx="50" cy="50" r="1.5" fill="%23000"/></svg>');
  background-size: 20px 20px;
  pointer-events: none;
}

.diagram-container {
  max-width: 1300px;
  margin: 0 auto;
  padding: 0 40px;
  position: relative;
  height: 600px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.diagram-side-img {
  position: absolute;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.06);
  transition: var(--transition-smooth);
  z-index: 5;
}

.diagram-side-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s ease;
}

.diagram-side-img:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.12);
}

.diagram-side-img:hover img {
  transform: scale(1.05);
}

.img-top-left {
  width: 160px;
  height: 160px;
  left: 5%;
  top: 15%;
  border-radius: 50%;
}

.img-bottom-left {
  width: 180px;
  height: 180px;
  left: 3%;
  bottom: 12%;
  border-radius: 50%;
}

.img-right {
  width: 280px;
  height: 180px;
  right: 2%;
  top: 35%;
  border-radius: 90px;
}

/* Core Diagram Canvas */
.core-diagram-wrapper {
  position: relative;
  width: 800px;
  height: 500px;
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 10;
}

.diagram-vector-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.flow-path {
  fill: none;
  stroke: rgba(0, 0, 0, 0.08);
  stroke-width: 2;
  stroke-dasharray: 6 6;
  animation: rotateFlow 35s linear infinite;
  transform-origin: 400px 250px;
}

@keyframes rotateFlow {
  to { transform: rotate(360deg); }
}

.diagram-label {
  position: absolute;
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--color-dark-light);
  background: var(--color-light);
  padding: 4px 12px;
  border-radius: 12px;
}

.label-top {
  top: 40px;
  left: 50%;
  transform: translateX(-50%);
}

.label-bottom {
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
}

/* Overlapping Central Circles */
.central-circles {
  display: flex;
  position: relative;
  width: 320px;
  height: 200px;
}

.main-circle {
  width: 180px;
  height: 180px;
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.3;
  position: absolute;
  top: 10px;
  background-color: rgba(255, 255, 255, 0.95);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
  cursor: pointer;
  transition: var(--transition-smooth);
  border: 2px solid transparent;
}

.venous-circle {
  left: 0;
  border-color: var(--color-primary); /* Swapped: Blue is primary now */
  color: var(--color-primary);
}

.arterial-circle {
  right: 0;
  border-color: var(--color-secondary); /* Swapped: Orange is secondary now */
  color: var(--color-secondary);
}

/* Active/Hover states for main circles */
.venous-circle:hover, .core-diagram-wrapper.venous-active .venous-circle {
  transform: scale(1.08);
  box-shadow: 0 15px 40px rgba(0, 78, 204, 0.15);
  background-color: var(--color-white);
  z-index: 12;
}

.arterial-circle:hover, .core-diagram-wrapper.arterial-active .arterial-circle {
  transform: scale(1.08);
  box-shadow: 0 15px 40px rgba(240, 90, 36, 0.15);
  background-color: var(--color-white);
  z-index: 12;
}

/* Diagram Nodes (Icons + Labels) */
.node {
  position: absolute;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  transition: var(--transition-smooth);
}

.node-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.04);
  border: 1.5px solid transparent;
  transition: var(--transition-smooth);
}

.node-icon i {
  width: 18px;
  height: 18px;
  transition: var(--transition-smooth);
}

.node-label {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--color-dark-light);
  transition: var(--transition-fast);
}

/* Specific node placements */
/* Left side: Venous Nodes (Blue) */
.node-v-1 { top: 90px; left: 190px; }
.node-v-2 { top: 228px; left: 120px; }
.node-v-3 { bottom: 90px; left: 190px; }

.venous-node .node-icon {
  border-color: rgba(0, 78, 204, 0.25);
  color: var(--color-primary);
}

/* Right side: Arterial Nodes (Orange) */
.node-a-1 { top: 90px; right: 190px; }
.node-a-2 { top: 228px; right: 120px; }
.node-a-3 { bottom: 90px; right: 190px; }

.arterial-node .node-icon {
  border-color: rgba(240, 90, 36, 0.25);
  color: var(--color-secondary);
}

/* Hover/Active states on nodes */
.venous-node:hover .node-icon, .core-diagram-wrapper.venous-active .venous-node .node-icon {
  transform: scale(1.15);
  border-color: var(--color-primary);
  background-color: var(--color-primary);
  color: var(--color-white);
  box-shadow: 0 10px 20px rgba(0, 78, 204, 0.2);
}

.arterial-node:hover .node-icon, .core-diagram-wrapper.arterial-active .arterial-node .node-icon {
  transform: scale(1.15);
  border-color: var(--color-secondary);
  background-color: var(--color-secondary);
  color: var(--color-white);
  box-shadow: 0 10px 20px rgba(240, 90, 36, 0.2);
}

.venous-node:hover .node-label, .core-diagram-wrapper.venous-active .venous-node .node-label {
  color: var(--color-primary);
}

.arterial-node:hover .node-label, .core-diagram-wrapper.arterial-active .arterial-node .node-label {
  color: var(--color-secondary);
}

/* Micro-interaction node rotations */
.node-v-2:hover .node-icon i, .core-diagram-wrapper.venous-active .node-v-2 .node-icon i {
  transform: rotate(90deg);
}
.node-a-2:hover .node-icon i, .core-diagram-wrapper.arterial-active .node-a-2 .node-icon i {
  transform: rotate(90deg);
}

/* --- WORKS SECTION --- */
.works-section {
  padding: 120px 0;
  background-color: var(--color-white);
}

.works-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 80px;
}

.works-image-pane {
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.08);
}

.works-image-pane img {
  width: 100%;
  height: 520px;
  object-fit: cover;
  transition: transform 0.8s ease;
}

.works-image-pane:hover img {
  transform: scale(1.03);
}

.section-title-small {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-dark);
  letter-spacing: 2.5px;
  margin-bottom: 12px;
}

.works-subtitle {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 24px;
  line-height: 1.3;
  color: var(--color-dark);
}

.works-desc {
  font-size: 1.05rem;
  color: var(--color-dark-light);
  line-height: 1.85;
  margin-bottom: 36px;
}

.works-content-pane .btn-wrapper {
  justify-content: flex-start;
}

/* --- INTEGRATED ANNUAL REPORT --- */
.report-section {
  padding: 40px 0;
  background-color: var(--color-white);
}

.report-container {
  max-width: var(--max-width);
}

.report-card {
  background: linear-gradient(135deg, hsl(220, 94%, 32%) 0%, hsl(210, 95%, 48%) 100%); /* Swapped to Blue gradient */
  border-radius: 16px;
  padding: 50px 60px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--color-white);
  box-shadow: 0 20px 40px rgba(0, 78, 204, 0.15);
  position: relative;
  overflow: hidden;
}

.report-card::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 300px;
  height: 100%;
  background: radial-gradient(circle, rgba(255,255,255,0.15) 0%, rgba(255,255,255,0) 70%);
  pointer-events: none;
}

.report-content {
  max-width: 700px;
}

.report-title {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: 1px;
  margin-bottom: 16px;
}

.report-desc {
  font-size: 1.05rem;
  opacity: 0.9;
  line-height: 1.7;
}

.report-action-btn {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--color-white);
  transition: var(--transition-smooth);
  border: 1px solid rgba(255, 255, 255, 0.3);
  flex-shrink: 0;
}

.report-card:hover .report-action-btn {
  background-color: var(--color-white);
  color: var(--color-primary);
  transform: scale(1.1) rotate(360deg);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

/* --- COMPANY SECTION --- */
.company-section {
  padding: 100px 0 60px;
  background-color: var(--color-white);
}

.company-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 50px;
}

.company-title-group {
  max-width: 600px;
}

.company-title-group .section-title {
  margin-bottom: 16px;
  display: inline-block;
}

.company-desc {
  font-size: 1.1rem;
  color: var(--color-dark-light);
}

.company-header .btn-wrapper {
  justify-content: flex-end;
}

.company-gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 60px;
}

.gallery-item {
  border-radius: 16px;
  overflow: hidden;
  height: 280px;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.05);
  transition: var(--transition-smooth);
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.gallery-item:hover {
  transform: translateY(-8px);
  box-shadow: 0 25px 45px rgba(0, 0, 0, 0.1);
}

.gallery-item:hover img {
  transform: scale(1.05);
}

/* Back to Top button */
.back-to-top-wrapper {
  display: flex;
  justify-content: center;
  margin-top: 40px;
}

.back-to-top-link {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--color-dark-light);
  transition: var(--transition-smooth);
}

.back-to-top-link i {
  font-size: 1.2rem;
  transition: var(--transition-smooth);
}

.back-to-top-link:hover {
  color: var(--color-primary);
}

.back-to-top-link:hover i {
  transform: translateY(-4px);
}

/* --- CONTACT SECTION --- */
.contact-section {
  background-color: var(--color-primary);
  color: var(--color-white);
  padding: 80px 0;
  transition: var(--transition-smooth);
}

.contact-container {
  max-width: var(--max-width);
}

.contact-title {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: 2px;
  margin-bottom: 20px;
}

.contact-desc {
  max-width: 600px;
  margin: 0 auto 36px;
  font-size: 1.1rem;
  line-height: 1.7;
  opacity: 0.95;
}

/* --- FOOTER --- */
.footer {
  background-color: var(--color-light);
  border-top: 1px solid rgba(0, 0, 0, 0.05);
  padding: 80px 0 0;
}

.footer-container {
  display: grid;
  grid-template-columns: 1.5fr 1.5fr 1fr;
  gap: 60px;
  padding-bottom: 60px;
}

.footer-brand-info {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.footer-logo-img {
  height: 60px;
  width: auto;
  object-fit: contain;
  align-self: flex-start;
}

.address-details {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--color-dark-light);
}

.address-title {
  font-weight: 700;
  color: var(--color-dark);
}

.address-line {
  margin-top: 4px;
}

.address-map-link {
  color: inherit;
  text-decoration: underline;
  transition: opacity 0.3s ease;
}

.address-map-link:hover {
  opacity: 0.8;
}

.contact-line {
  margin-top: 4px;
}

.footer-nav-groups {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.footer-nav-col {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.footer-link {
  font-size: 0.95rem;
  color: var(--color-dark-light);
  font-weight: 500;
  width: fit-content;
}

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

.footer-social-links {
  display: flex;
  justify-content: flex-end;
  gap: 20px;
  align-items: flex-start;
}

.social-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-color: var(--color-white);
  color: var(--color-dark-light);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.04);
  transition: var(--transition-smooth);
}

.social-icon:hover {
  color: var(--color-white);
  transform: translateY(-3px);
}

.social-icon[aria-label="Instagram"]:hover {
  background: radial-gradient(circle at 30% 107%, #fdf497 0%, #fdf497 5%, #fd5949 45%,#d6249f 60%,#285AEB 90%);
}

.social-icon[aria-label="Facebook"]:hover {
  background-color: #1877F2;
}

.social-icon[aria-label="Youtube"]:hover {
  background-color: #FF0000;
}

/* Image-based social icons */
.social-icon-link {
  width: 48px;
  height: 48px;
  background-color: var(--color-white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-smooth);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.08);
  color: var(--color-dark-light);
}

.social-icon-svg {
  width: 24px;
  height: 24px;
}

.social-icon-link:hover {
  transform: translateY(-4px) scale(1.1);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.social-icon-link[aria-label="Facebook"]:hover {
  background-color: #1877F2;
  color: white;
}

.social-icon-link[aria-label="Instagram"]:hover {
  background: radial-gradient(circle at 30% 107%, #fdf497 0%, #fdf497 5%, #fd5949 45%, #d6249f 60%, #285AEB 90%);
  color: white;
}

.social-icon-link[aria-label="LinkedIn"]:hover {
  background-color: #0077b5;
  color: white;
}

.social-icon-link[aria-label="TikTok"]:hover {
  background-color: #000000;
  color: white;
}

.tiktok-icon-link {
  background-color: transparent !important;
  box-shadow: none !important;
}

.tiktok-icon-img {
  width: 32px;
  height: 32px;
  object-fit: contain;
}

.footer-bottom-bar {
  background-color: var(--color-primary);
  color: var(--color-white);
  text-align: center;
  padding: 16px 24px;
  font-size: 0.8rem;
  font-weight: 500;
}

/* --- SCROLL REVEAL ANIMATIONS --- */
.scroll-reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.scroll-reveal.reveal-active {
  opacity: 1;
  transform: translateY(0);
}

/* --- RESPONSIVE DESIGN (MEDIA QUERIES) --- */

@media (max-width: 1024px) {
  .hero-title {
    font-size: 3.8rem;
  }
  
  .diagram-container {
    height: auto;
    padding: 60px 24px;
    flex-direction: column;
    gap: 40px;
  }
  
  .diagram-side-img {
    position: static;
    margin: 0 auto;
  }
  
  .img-top-left, .img-bottom-left, .img-right {
    width: 280px;
    height: 180px;
    border-radius: 16px;
  }
  
  .core-diagram-wrapper {
    width: 100%;
    height: auto;
    max-width: 600px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 30px;
  }
  
  .diagram-vector-overlay {
    display: none;
  }
  
  .diagram-label {
    position: static;
    transform: none !important;
    text-align: center;
    width: fit-content;
    margin: 0 auto;
  }
  
  .central-circles {
    width: 100%;
    height: auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
  }
  
  .main-circle {
    position: static;
    width: 200px;
    height: 200px;
  }
  
  .node {
    position: static;
    flex-direction: row;
    align-items: center;
    justify-content: flex-start;
    width: 100%;
    max-width: 250px;
    margin: 0 auto;
    background: var(--color-white);
    padding: 12px 20px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.02);
  }
  
  .node-icon {
    flex-shrink: 0;
  }
  
  .works-container {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .works-image-pane img {
    height: 350px;
  }
  
  .company-gallery {
    grid-template-columns: 1fr;
  }
  
  .footer-container {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .footer-social-links {
    justify-content: flex-start;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 70px;
  }
  
  .header-container {
    padding: 0 16px;
  }
  
  .header-actions {
    gap: 12px;
  }
  
  .logo-img {
    height: 36px;
  }
  
  .nav-contact-btn {
    padding: 6px 14px;
    font-size: 0.85rem;
  }
  
  .mobile-menu-toggle {
    display: block;
  }
  
  .nav-menu {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    height: calc(100vh - var(--header-height));
    background-color: var(--color-white);
    flex-direction: column;
    padding: 40px;
    gap: 24px;
    transform: translateX(100%);
    transition: var(--transition-smooth);
    z-index: 999;
  }
  
  .nav-menu.active {
    transform: translateX(0);
  }
  
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
    padding-top: 40px;
  }
  
  .hero-title {
    font-size: 2.8rem;
  }
  
  .hero-desc {
    margin: 0 auto;
  }
  
  .vertical-focus-text {
    display: none;
  }
  
  .message-section {
    padding: 60px 0;
  }
  
  .message-text {
    font-size: 1rem;
  }
  
  .company-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 24px;
  }
  
  .report-card {
    flex-direction: column;
    text-align: center;
    gap: 24px;
    padding: 40px 30px;
  }
}

@media (max-width: 480px) {
  .logo-img {
    height: 30px;
  }
  
  .header-actions {
    gap: 8px;
  }
  
  .nav-contact-btn {
    padding: 5px 10px;
    font-size: 0.8rem;
  }
  
  .lang-toggle {
    font-size: 0.8rem;
    gap: 4px;
  }
}