/**
 * Main Stylesheet for HUMMAN RESEARCH Website
 * Based on design guide (04_layout/01_design_guide.md)
 * 
 * Design Priority:
 * 1. Name-card.png (Business Card Design) - Colors, Logo, Brand Identity
 * 2. activetheory.net Layout - Layout Structure, Interactions, Motion Effects
 */

/* ============================================
   RESET / NORMALIZE CSS
   ============================================ */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family-primary);
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-normal);
  color: var(--text-primary);
  background-color: var(--bg-primary);
  overflow-x: hidden;
}

/* Remove default list styles */
ul,
ol {
  list-style: none;
}

/* Remove default link styles */
a {
  text-decoration: none;
  color: inherit;
  transition: color var(--transition-base);
}

/* Remove default button styles */
button {
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

/* Remove default input styles */
input,
textarea,
select {
  font-family: inherit;
  font-size: inherit;
  border: none;
  outline: none;
}

/* Image defaults */
img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

.skip-link {
  position: absolute;
  top: -100px;
  left: 0;
  z-index: var(--z-index-tooltip);
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--color-primary-blue);
  color: var(--text-secondary);
  border-radius: var(--border-radius-md);
}

.skip-link:focus {
  top: var(--spacing-md);
}

.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding-left: var(--container-padding-mobile);
  padding-right: var(--container-padding-mobile);
}

@media (min-width: 768px) {
  .container {
    padding-left: var(--container-padding-tablet);
    padding-right: var(--container-padding-tablet);
  }
}

@media (min-width: 1024px) {
  .container {
    padding-left: var(--container-padding-desktop);
    padding-right: var(--container-padding-desktop);
  }
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.section-title {
  font-size: var(--font-size-h2);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
  letter-spacing: var(--letter-spacing-tight);
}

.section-subtitle {
  font-size: var(--font-size-body);
  color: var(--text-muted);
}

/* ============================================
   HEADER / NAVIGATION (activetheory.net style)
   ============================================ */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-index-fixed);
  background: rgba(10, 14, 26, 0.95); /* Dark background to match theme */
  backdrop-filter: blur(10px);
  border-bottom: var(--border-width-thin) solid rgba(255, 255, 255, 0.1); /* Light border for dark background */
  transition: background var(--transition-base);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
  padding: 0 var(--spacing-lg);
}

/* Hamburger Menu Button */
.nav-hamburger {
  position: relative;
  width: 30px;
  height: 24px;
  z-index: var(--z-index-menu-overlay);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.nav-hamburger-line {
  width: 100%;
  height: 2px;
  background: var(--text-secondary); /* White for dark header */
  transition: all var(--transition-base);
  transform-origin: center;
}

.nav-hamburger[aria-expanded="true"] .nav-hamburger-line:nth-child(1) {
  transform: translateY(11px) rotate(45deg);
}

.nav-hamburger[aria-expanded="true"] .nav-hamburger-line:nth-child(2) {
  opacity: 0;
}

.nav-hamburger[aria-expanded="true"] .nav-hamburger-line:nth-child(3) {
  transform: translateY(-11px) rotate(-45deg);
}

/* Logo */
.nav-logo {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}

.nav-logo a {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.logo-img {
  width: 40px;
  height: 40px;
}

.logo-text {
  font-size: var(--font-size-small);
  font-weight: var(--font-weight-bold);
  letter-spacing: var(--letter-spacing-wider);
  color: var(--text-secondary); /* White text for dark header */
  text-transform: uppercase;
}

/* Sliding Overlay Menu */
.nav-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--nav-overlay-bg);
  z-index: calc(var(--z-index-menu-overlay) - 1);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--nav-overlay-transition), visibility var(--nav-overlay-transition);
}

.nav-overlay[aria-hidden="false"] {
  opacity: 1;
  visibility: visible;
}

.nav-overlay-content {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  padding: var(--spacing-4xl);
}

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

.nav-menu-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
}

.nav-menu-link {
  font-size: var(--font-size-h2);
  font-weight: var(--font-weight-medium);
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wide);
  transition: color var(--transition-base);
  position: relative;
}

.nav-menu-link::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-metallic-silver);
  transition: width var(--transition-base);
}

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

/* ============================================
   HERO SECTION (activetheory.net + Business Card)
   ============================================ */

.hero {
  position: relative;
  min-height: var(--hero-min-height-mobile);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding-top: 70px; /* Header height */
}

@media (min-width: 768px) {
  .hero {
    min-height: var(--hero-min-height-tablet);
  }
}

@media (min-width: 1024px) {
  .hero {
    min-height: var(--hero-min-height-desktop);
  }
}

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: var(--z-index-base);
  overflow: hidden;
  /* Real background image (so it appears in Network and is visible) */
  background-image: url("/images/figma/image%208.png");
  background-size: cover;
  background-position: 50% 40%;
  background-repeat: no-repeat;
}

.hero-gradient {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    135deg,
    rgba(19, 26, 47, 0.9) 0%, /* Dark blue from Figma */
    rgba(10, 14, 26, 0.98) 50%, /* Almost black */
    rgba(19, 26, 47, 0.9) 100%
  );
  opacity: 0.85; /* Darker to match Figma design */
}

.hero-lighting {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(
    circle at 30% 20%,
    rgba(255, 255, 255, 0.1) 0%, /* Subtle light from top */
    rgba(255, 255, 255, 0.03) 50%,
    transparent 100%
  );
  pointer-events: none;
  opacity: 0.4; /* Darker to match Figma design */
}

/* Figma background graphics */
.hero-bg-ellipse,
.hero-bg-polygon {
  position: absolute;
  opacity: 0.3;
  pointer-events: none;
  z-index: var(--z-index-base);
  mix-blend-mode: overlay;
}

.hero-bg-ellipse {
  top: 10%;
  right: 5%;
  width: 400px;
  height: auto;
  filter: blur(30px);
  animation: float 20s ease-in-out infinite;
  opacity: 0.4;
}

.hero-bg-polygon {
  bottom: 15%;
  left: 5%;
  width: 500px;
  height: auto;
  filter: blur(35px);
  animation: float 25s ease-in-out infinite reverse;
  opacity: 0.35;
}

@keyframes float {
  0%, 100% {
    transform: translateY(0) rotate(0deg);
  }
  50% {
    transform: translateY(-30px) rotate(5deg);
  }
}

@media (max-width: 768px) {
  .hero-bg-ellipse,
  .hero-bg-polygon {
    opacity: 0.1;
  }
  
  .hero-bg-ellipse {
    width: 200px;
  }
  
  .hero-bg-polygon {
    width: 250px;
  }
}

.hero-content {
  position: relative;
  z-index: calc(var(--z-index-base) + 1);
  text-align: center;
  padding: var(--spacing-2xl) var(--spacing-lg);
  max-width: 800px;
}

.hero-logo {
  margin-bottom: var(--spacing-xl);
}

.hero-logo-img {
  width: 120px;
  height: 120px;
  margin: 0 auto;
  filter: drop-shadow(var(--shadow-metallic));
}

@media (min-width: 768px) {
  .hero-logo-img {
    width: 150px;
    height: 150px;
  }
}

/* Hero 섹션 텍스트 스타일 */
.hero-main-headline {
  font-size: var(--font-size-h1);
  font-weight: var(--font-weight-bold);
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wider);
  text-shadow: var(--shadow-metallic);
  margin-bottom: var(--spacing-lg);
}

.hero-subheadline {
  font-size: var(--font-size-body);
  color: var(--text-secondary);
  opacity: 0.9;
  margin-bottom: var(--spacing-xl);
  line-height: var(--line-height-relaxed);
}

.hero-section-title {
  font-size: var(--font-size-h2);
  font-weight: var(--font-weight-bold);
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wide);
  margin-top: var(--spacing-2xl);
  margin-bottom: var(--spacing-lg);
}

.hero-description {
  font-size: var(--font-size-body);
  color: var(--text-secondary);
  opacity: 0.85;
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--spacing-xl);
}

.hero-tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  justify-content: center;
  margin-top: var(--spacing-xl);
}

.tech-tag {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-md);
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--border-radius-full);
  font-size: var(--font-size-small);
  color: var(--text-secondary);
  letter-spacing: var(--letter-spacing-wide);
  backdrop-filter: blur(10px);
  transition: all var(--transition-base);
}

.tech-tag:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.3);
  transform: translateY(-2px);
}

.hero-cta {
  margin-top: var(--spacing-xl);
}

.hero-scroll-indicator {
  position: absolute;
  bottom: var(--spacing-xl);
  left: 50%;
  transform: translateX(-50%);
  z-index: calc(var(--z-index-base) + 1);
  animation: bounce 2s infinite;
}

.scroll-arrow {
  display: block;
  width: 24px;
  height: 24px;
  border-right: 2px solid var(--text-secondary);
  border-bottom: 2px solid var(--text-secondary);
  transform: rotate(45deg);
  opacity: 0.7;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateX(-50%) translateY(0);
  }
  40% {
    transform: translateX(-50%) translateY(-10px);
  }
  60% {
    transform: translateX(-50%) translateY(-5px);
  }
}

/* ============================================
   START / CORE / CONTENTS / VALUES / END (Figma-based homepage sections)
   ============================================ */

:root {
  /* Fixed message spacing at bottom */
  --end-message-height: 96px;

  /* Metallic interaction defaults */
  --pointer-x: 50%;
  --pointer-y: 50%;
}

body {
  /* Ensure fixed end message never covers content */
  padding-bottom: var(--end-message-height);
}

/* Start: LOGO */
.start-section {
  min-height: 60vh;
  display: grid;
  place-items: center;
  padding: var(--section-padding-mobile) 0;
  background: var(--bg-primary); /* Dark background */
}

.start-logo-img {
  width: min(520px, 78vw);
  height: auto;
  filter: drop-shadow(var(--shadow-metallic));
  opacity: 0.98;
}

/* Core Concept */
.core-concept {
  padding: var(--section-padding-mobile) 0;
  background: var(--bg-primary); /* Dark background */
}

.core-concept-title {
  font-size: var(--font-size-h3);
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--letter-spacing-wide);
  color: var(--color-primary-blue);
  text-transform: uppercase;
  margin-bottom: var(--spacing-lg);
}

.core-concept-subtitle {
  font-size: var(--font-size-small);
  font-weight: var(--font-weight-normal);
  color: var(--text-muted);
}

.core-concept-headline {
  font-size: var(--font-size-h2);
  font-weight: var(--font-weight-bold);
  letter-spacing: var(--letter-spacing-tight);
  margin-bottom: var(--spacing-md);
}

.core-concept-text {
  font-size: var(--font-size-body);
  color: var(--text-primary);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--spacing-md);
}

.core-concept-quote {
  margin-top: var(--spacing-xl);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  background: rgba(30, 58, 138, 0.15); /* Brighter for dark background */
  border: 1px solid rgba(30, 58, 138, 0.3);
}

.core-concept-quote p {
  font-size: var(--font-size-body);
  color: var(--color-primary-blue);
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
  text-align: center;
}

/* Contents 1: Cards */
.contents-1 {
  padding: var(--section-padding-mobile) 0;
  background: var(--bg-primary); /* Dark background */
  position: relative;
  min-height: 100vh; /* Full height for DNA layout */
}

.contents-1-wrapper {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* DNA Double Helix (Central Element) */
.dna-helix-container {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: var(--z-index-base);
  width: min(400px, 60vw);
  height: auto;
  opacity: 1;
  pointer-events: none;
}

.dna-helix {
  width: 100%;
  height: auto;
  filter: drop-shadow(0 0 30px rgba(30, 58, 138, 0.8)) drop-shadow(0 0 60px rgba(30, 58, 138, 0.4));
  animation: dna-glow 3s ease-in-out infinite;
  opacity: 0.9;
}

@keyframes dna-glow {
  0%, 100% {
    filter: drop-shadow(0 0 30px rgba(30, 58, 138, 0.8)) drop-shadow(0 0 60px rgba(30, 58, 138, 0.4));
    opacity: 0.9;
  }
  50% {
    filter: drop-shadow(0 0 40px rgba(30, 58, 138, 1)) drop-shadow(0 0 80px rgba(30, 58, 138, 0.6));
    opacity: 1;
  }
}

.cards-grid {
  position: relative;
  z-index: calc(var(--z-index-base) + 1);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xl);
  width: 100%;
  /* Ensure cards don't completely cover DNA */
  mix-blend-mode: normal;
}

@media (min-width: 768px) {
  .cards-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--spacing-2xl);
    max-width: 1200px;
    margin: 0 auto;
  }
  
  .dna-helix-container {
    width: min(500px, 50vw);
  }
}

@media (min-width: 1280px) {
  .cards-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--spacing-3xl);
    max-width: 1400px;
  }
  
  .dna-helix-container {
    width: min(600px, 45vw);
  }
}

.card {
  position: relative;
  overflow: hidden;
  transform-style: preserve-3d;
  will-change: transform;
  /* Connection line to DNA (will be styled with ::before) */
}

/* Card connection lines to DNA */
.card::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 2px;
  background: repeating-linear-gradient(
    to right,
    rgba(255, 255, 255, 0.6) 0px,
    rgba(255, 255, 255, 0.6) 4px,
    transparent 4px,
    transparent 8px
  );
  transform-origin: left center;
  pointer-events: none;
  z-index: -1;
  opacity: 0;
  transition: opacity var(--transition-base), width var(--transition-base);
}

@media (min-width: 768px) {
  .card::before {
    opacity: 0.6;
  }
  
  /* Position connection lines based on card position */
  .cards-grid > .card:nth-child(1)::before {
    /* Top left card - line to center */
    transform: translate(-50%, -50%) rotate(-45deg);
    width: 250px;
  }
  
  .cards-grid > .card:nth-child(2)::before {
    /* Top right card - line to center */
    transform: translate(-50%, -50%) rotate(45deg);
    width: 250px;
  }
  
  .cards-grid > .card:nth-child(3)::before {
    /* Bottom left card - line to center */
    transform: translate(-50%, -50%) rotate(-135deg);
    width: 250px;
  }
  
  .cards-grid > .card:nth-child(4)::before {
    /* Bottom right card - line to center */
    transform: translate(-50%, -50%) rotate(135deg);
    width: 250px;
  }
}

@media (min-width: 1280px) {
  .cards-grid > .card:nth-child(1)::before,
  .cards-grid > .card:nth-child(2)::before,
  .cards-grid > .card:nth-child(3)::before,
  .cards-grid > .card:nth-child(4)::before {
    width: 300px;
  }
}

.card-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: 8px 12px;
  border-radius: 999px;
  font-size: var(--font-size-small);
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--letter-spacing-wider);
  text-transform: uppercase;
  color: var(--text-secondary);
  background: var(--color-primary-blue);
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--spacing-lg);
}

.card-one-liner {
  color: rgba(255, 255, 255, 0.7); /* Lighter text for better contrast on dark background */
  margin-top: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
  line-height: var(--line-height-relaxed);
}

.card-hover-copy {
  opacity: 0;
  max-height: 0;
  overflow: hidden;
  transform: translateY(8px);
  transition: opacity var(--transition-base), transform var(--transition-base), max-height var(--transition-base);
  margin-bottom: 0;
  color: rgba(255, 255, 255, 0.85); /* Lighter text for hover copy */
}

.card:hover .card-hover-copy,
.card:focus-within .card-hover-copy {
  opacity: 1;
  max-height: 240px;
  transform: translateY(0);
  margin-bottom: var(--spacing-lg);
}

/* Metallic shine (business card inspired) */
[data-metallic]::before {
  content: '';
  position: absolute;
  inset: -1px;
  background:
    radial-gradient(
      450px 280px at var(--pointer-x) var(--pointer-y),
      rgba(255, 255, 255, 0.35) 0%,
      rgba(255, 255, 255, 0.12) 25%,
      rgba(255, 255, 255, 0.00) 60%
    ),
    linear-gradient(
      135deg,
      rgba(192, 192, 192, 0.10) 0%,
      rgba(255, 255, 255, 0.06) 35%,
      rgba(30, 58, 138, 0.06) 100%
    );
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
  mix-blend-mode: screen;
}

[data-metallic]:hover::before,
[data-metallic]:focus-within::before {
  opacity: 1;
}

/* CTA disabled (no function yet) */
.card-cta[aria-disabled="true"] {
  opacity: 0.85;
}

/* Contents 2: Detail Section */
.contents-2 {
  padding: var(--section-padding-mobile) 0;
  background: var(--bg-primary); /* Dark background */
}

.detail-section {
  padding: var(--spacing-2xl);
  border-radius: var(--border-radius-xl);
  border: 1px solid rgba(255, 255, 255, 0.1); /* White border for dark background */
  box-shadow: var(--shadow-sm);
  background: rgba(19, 26, 47, 0.6); /* Dark blue background */
  backdrop-filter: blur(6px);
  color: var(--text-primary); /* Ensure text is white */
}

.detail-section p {
  color: rgba(255, 255, 255, 0.9); /* Light text for readability */
  line-height: var(--line-height-relaxed);
}

.detail-section li {
  color: rgba(255, 255, 255, 0.85); /* Light text for list items */
}

.detail-section + .detail-section {
  margin-top: var(--spacing-2xl);
}

.detail-title {
  font-size: var(--font-size-h3);
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
  color: var(--color-primary-blue);
  margin-bottom: var(--spacing-lg);
}

.detail-subtitle {
  font-size: var(--font-size-small);
  font-weight: var(--font-weight-normal);
  color: var(--text-muted);
}

.detail-content {
  color: var(--text-primary); /* Ensure content text is white */
}

.detail-scope {
  color: rgba(255, 255, 255, 0.85); /* Light text for scope */
  margin-bottom: var(--spacing-md);
}

.detail-heading {
  margin-top: var(--spacing-lg);
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--letter-spacing-tight);
  color: var(--text-secondary); /* White text for headings */
}

.detail-list {
  list-style: disc;
  padding-left: 1.2rem;
  margin-top: var(--spacing-md);
}

.detail-note {
  margin-top: var(--spacing-md);
  color: var(--text-muted);
  font-size: var(--font-size-small);
}

.detail-quote {
  margin-top: var(--spacing-lg);
  padding: var(--spacing-lg);
  border-left: 3px solid var(--color-primary-blue);
  background: rgba(30, 58, 138, 0.15); /* Brighter for dark background */
  border-radius: var(--border-radius-md);
}

.detail-quote p {
  color: rgba(255, 255, 255, 0.9); /* Light text for quotes */
}

.research-areas {
  margin-top: var(--spacing-lg);
}

.research-area {
  margin-bottom: var(--spacing-xl);
}

.research-area-title {
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-semibold);
  color: var(--text-secondary); /* White text */
  margin-bottom: var(--spacing-sm);
}

.research-area-list {
  list-style: disc;
  padding-left: 1.2rem;
  margin-top: var(--spacing-sm);
}

.research-area-list li {
  color: rgba(255, 255, 255, 0.85); /* Light text for list items */
  line-height: var(--line-height-relaxed);
}

/* Values */
.values {
  position: relative;
  padding: var(--section-padding-mobile) 0;
  background: var(--bg-primary); /* Dark background */
  overflow: hidden;
}

.values-background {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: var(--z-index-base);
  background-image: url("/images/figma/Mask%20group%20(1).png");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  opacity: 0.15;
  filter: blur(20px);
  pointer-events: none;
}

.values-grid {
  position: relative;
  z-index: calc(var(--z-index-base) + 1);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xl);
}

@media (min-width: 768px) {
  .values-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.value-item {
  padding: var(--spacing-2xl);
  border-radius: var(--border-radius-xl);
  background: rgba(19, 26, 47, 0.6); /* Dark blue background */
  border: 1px solid rgba(255, 255, 255, 0.1); /* White border for dark background */
  box-shadow: var(--shadow-sm);
}

.value-title {
  font-size: var(--font-size-h3);
  color: var(--color-primary-blue);
  margin-bottom: var(--spacing-sm);
}

.value-description {
  color: var(--text-muted);
  line-height: var(--line-height-relaxed);
}

/* End: fixed bottom message (no logo) */
.end-section {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  height: var(--end-message-height);
  z-index: var(--z-index-fixed);
  display: flex;
  align-items: center;
  background: rgba(30, 58, 138, 0.92);
  color: var(--text-secondary);
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(10px);
}

.end-message {
  text-align: center;
  width: 100%;
}

.end-message p {
  font-size: var(--font-size-small);
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
  opacity: 0.95;
}

/* Overlay menu open: lock scroll */
body.is-menu-open {
  overflow: hidden;
}

/* ============================================
   ABOUT SECTION (Business Card design priority)
   ============================================ */

.about {
  padding: var(--section-padding-mobile) 0;
  background: var(--bg-primary);
}

@media (min-width: 768px) {
  .about {
    padding: var(--section-padding-tablet) 0;
  }
}

@media (min-width: 1024px) {
  .about {
    padding: var(--section-padding-desktop) 0;
  }
}

.about-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-2xl);
  align-items: center;
}

@media (min-width: 768px) {
  .about-content {
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
  }
}

.about-text {
  order: 2;
}

@media (min-width: 768px) {
  .about-text {
    order: 1;
  }
}

.about-description {
  font-size: var(--font-size-body);
  line-height: var(--line-height-relaxed);
  color: var(--text-primary);
  margin-bottom: var(--spacing-lg);
}

.about-visual {
  order: 1;
}

@media (min-width: 768px) {
  .about-visual {
    order: 2;
  }
}

.about-card {
  background: var(--bg-primary);
  border-radius: var(--card-border-radius);
  padding: var(--card-padding);
  box-shadow: var(--card-shadow);
  text-align: center;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.about-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--card-shadow-hover);
}

.card-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--spacing-lg);
  background: var(--gradient-metallic);
  border-radius: var(--border-radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-emboss);
}

.card-title {
  font-size: var(--font-size-h3);
  font-weight: var(--font-weight-semibold);
  color: var(--text-secondary); /* White text for better contrast on dark cards */
  margin-bottom: var(--spacing-sm);
}

.card-description {
  font-size: var(--font-size-body);
  color: var(--text-muted);
}

/* ============================================
   SERVICES SECTION (activetheory.net style)
   ============================================ */

.services {
  padding: 0;
}

.services-list {
  display: grid;
  grid-template-columns: 1fr;
}

.service-item {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.service-image {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: var(--z-index-base);
}

.service-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 50% 55%;
  transform: scale(1.05);
  filter: blur(3px) saturate(0.9) contrast(0.95) brightness(0.85);
  will-change: transform, filter;
}

.service-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(
      circle at 50% 40%,
      rgba(255, 255, 255, 0.08) 0%,
      rgba(255, 255, 255, 0.02) 35%,
      transparent 70%
    ),
    linear-gradient(
      to bottom,
      rgba(var(--color-primary-blue-rgb), 0.45) 0%,
      rgba(var(--color-primary-blue-rgb), 0.70) 100%
    );
  z-index: calc(var(--z-index-base) + 1);
}

.service-content {
  position: relative;
  z-index: calc(var(--z-index-base) + 2);
  text-align: center;
  padding: var(--spacing-2xl);
  max-width: 600px;
}

.service-content-inner {
  padding: var(--spacing-2xl) var(--spacing-2xl);
  border-radius: var(--border-radius-xl);
  background: rgba(255, 255, 255, 0.10);
  border: 1px solid rgba(255, 255, 255, 0.18);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-xl);
}

.service-item--research .service-image img {
  object-position: 50% 60%;
}

.service-item--consulting .service-image img {
  object-position: 50% 52%;
}

.service-item--analysis .service-image img {
  object-position: 50% 58%;
}

.service-title {
  font-size: var(--font-size-h1);
  font-weight: var(--font-weight-bold);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wide);
}

.service-description {
  font-size: var(--font-size-body);
  color: var(--text-secondary);
  opacity: 0.9;
}

/* ============================================
   CONTACT SECTION (Business Card design priority)
   ============================================ */

.contact {
  padding: var(--section-padding-mobile) 0;
  background: var(--bg-primary);
}

@media (min-width: 768px) {
  .contact {
    padding: var(--section-padding-tablet) 0;
  }
}

@media (min-width: 1024px) {
  .contact {
    padding: var(--section-padding-desktop) 0;
  }
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-3xl);
}

@media (min-width: 768px) {
  .contact-content {
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-4xl);
  }
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
}

.contact-item {
  padding: var(--spacing-lg);
  background: var(--bg-primary);
  border-radius: var(--card-border-radius);
  box-shadow: var(--card-shadow);
}

.contact-item-title {
  font-size: var(--font-size-h3);
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary-blue);
  margin-bottom: var(--spacing-sm);
}

.contact-link {
  color: var(--text-primary);
  transition: color var(--transition-base);
}

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

.contact-address {
  font-style: normal;
  color: var(--text-primary);
  line-height: var(--line-height-relaxed);
}

.contact-form-wrapper {
  background: var(--bg-primary);
  border-radius: var(--card-border-radius);
  padding: var(--card-padding);
  box-shadow: var(--card-shadow);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.form-label {
  font-size: var(--font-size-small);
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
}

.form-input,
.form-textarea {
  padding: var(--spacing-md);
  border: var(--border-width-thin) solid var(--color-gray-medium);
  border-radius: var(--border-radius-md);
  font-size: var(--font-size-body);
  color: var(--text-primary);
  background: var(--bg-primary);
  transition: border-color var(--transition-base);
}

.form-input:focus,
.form-textarea:focus {
  border-color: var(--color-primary-blue);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

/* ============================================
   FOOTER (Business Card design priority)
   ============================================ */

.footer {
  padding: var(--spacing-3xl) 0 var(--spacing-xl);
  background: var(--color-primary-blue);
  color: var(--text-secondary);
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-2xl);
  text-align: center;
}

@media (min-width: 768px) {
  .footer-content {
    grid-template-columns: 1fr 1fr;
    text-align: left;
  }
}

.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md);
}

@media (min-width: 768px) {
  .footer-brand {
    align-items: flex-start;
  }
}

.footer-logo-img {
  width: 60px;
  height: 60px;
}

.footer-company-name {
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-bold);
  letter-spacing: var(--letter-spacing-wider);
  text-transform: uppercase;
}

.footer-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  align-items: center;
}

@media (min-width: 768px) {
  .footer-info {
    align-items: flex-end;
  }
}

.footer-copyright {
  font-size: var(--font-size-small);
  opacity: 0.8;
}

.footer-nav-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  justify-content: center;
}

@media (min-width: 768px) {
  .footer-nav-list {
    justify-content: flex-end;
  }
}

.footer-nav-link {
  font-size: var(--font-size-small);
  color: var(--text-secondary);
  opacity: 0.8;
  transition: opacity var(--transition-base);
}

.footer-nav-link:hover {
  opacity: 1;
}

.footer-siteseal {
  display: flex;
  justify-content: center;
  margin-top: var(--spacing-md);
}

@media (min-width: 768px) {
  .footer-siteseal {
    justify-content: flex-end;
  }
}

/* GoDaddy Site Seal injects an image into #siteseal */
#siteseal img {
  max-height: 42px;
  width: auto;
  height: auto;
  display: block;
}

/* ============================================
   COMPONENT STYLES
   ============================================ */

/* Buttons (Business Card Based) */
.btn {
  display: inline-block;
  padding: var(--button-padding-y) var(--button-padding-x);
  border-radius: var(--button-border-radius);
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-medium);
  text-align: center;
  cursor: pointer;
  transition: all var(--button-transition);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wide);
}

.btn-primary {
  background: var(--color-primary-blue);
  color: var(--text-secondary);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  background: var(--color-primary-blue-dark);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background: transparent;
  color: var(--color-primary-blue);
  border: var(--border-width-medium) solid var(--color-primary-blue);
}

.btn-secondary:hover {
  background: var(--color-primary-blue);
  color: var(--text-secondary);
}

/* Cards */
.card {
  background: rgba(19, 26, 47, 0.7); /* Dark blue background for cards */
  border: 1px solid rgba(255, 255, 255, 0.1); /* Subtle white border */
  border-radius: var(--card-border-radius);
  padding: var(--card-padding);
  box-shadow: var(--card-shadow);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
  backdrop-filter: blur(6px);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--card-shadow-hover);
  border-color: rgba(255, 255, 255, 0.2); /* Brighter border on hover */
  background: rgba(19, 26, 47, 0.85); /* Slightly brighter on hover */
}

/* Logo Styles */
.logo-img,
.hero-logo-img,
.footer-logo-img {
  filter: drop-shadow(var(--shadow-metallic));
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

/* Mobile First - Base styles are mobile */

/* Tablet */
@media (min-width: 768px) {
  .section-title {
    font-size: clamp(2rem, 4vw, 2.5rem);
  }
}

/* Desktop */
@media (min-width: 1024px) {
  .nav {
    padding: 0 var(--spacing-2xl);
  }
  
  .hero-content {
    padding: var(--spacing-3xl) var(--spacing-2xl);
  }
}

/* Large Desktop */
@media (min-width: 1280px) {
  .container {
    max-width: var(--container-max-width);
  }
}

/* ============================================
   ACCESSIBILITY
   ============================================ */

/* Focus styles */
a:focus,
button:focus,
input:focus,
textarea:focus,
select:focus {
  outline: 2px solid var(--color-primary-blue);
  outline-offset: 2px;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  html {
    scroll-behavior: auto;
  }
}