@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600&family=Outfit:wght@400;500;600;700;800&display=swap');

/* --- DESIGN SYSTEM --- */
:root {
  /* Default Theme (Dark Mode) */
  --bg-color: #07090e;
  --bg-gradient: radial-gradient(circle at 50% 0%, #121626 0%, #07090e 100%);
  --card-bg: rgba(18, 22, 38, 0.5);
  --card-border: rgba(255, 255, 255, 0.08);
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --accent-primary: #8b5cf6; /* Violet */
  --accent-secondary: #06b6d4; /* Cyan */
  --accent-gradient: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.5);
  --glass-blur: blur(12px);
  --border-radius-lg: 16px;
  --border-radius-sm: 8px;
  --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

[data-theme="light"] {
  --bg-color: #f8fafc;
  --bg-gradient: radial-gradient(circle at 50% 0%, #e2e8f0 0%, #f8fafc 100%);
  --card-bg: rgba(255, 255, 255, 0.7);
  --card-border: rgba(0, 0, 0, 0.06);
  --text-main: #0f172a;
  --text-muted: #64748b;
  --accent-primary: #7c3aed;
  --accent-secondary: #0891b2;
  --accent-gradient: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg-color);
  background-image: var(--bg-gradient);
  background-attachment: fixed;
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color 0.5s ease, color 0.5s ease;
  min-height: 100vh;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  letter-spacing: -0.02em;
}

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

/* --- LAYOUT WRAPPER --- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* --- HEADER --- */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  background-color: rgba(7, 9, 14, 0.6);
  border-bottom: 1px solid var(--card-border);
  transition: var(--transition-smooth);
}

body[data-theme="light"] header {
  background-color: rgba(248, 250, 252, 0.6);
}

header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
}

.logo {
  font-size: 1.4rem;
  font-weight: 800;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 20px;
}

/* --- THEME TOGGLE BUTTON --- */
.theme-btn {
  background: none;
  border: 1px solid var(--card-border);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-main);
  transition: var(--transition-smooth);
  box-shadow: var(--shadow-sm);
}

.theme-btn:hover {
  background-color: var(--card-bg);
  transform: scale(1.05);
}

.theme-btn svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

/* Hide sun/moon depending on theme */
[data-theme="light"] .theme-btn .moon { display: block; }
[data-theme="light"] .theme-btn .sun { display: none; }
body:not([data-theme="light"]) .theme-btn .moon { display: none; }
body:not([data-theme="light"]) .theme-btn .sun { display: block; }

/* --- HERO SECTION --- */
.hero {
  padding: 160px 0 80px 0;
  text-align: center;
  position: relative;
}

.hero::after {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.15) 0%, rgba(6, 182, 212, 0) 70%);
  z-index: -1;
  pointer-events: none;
}

.hero-avatar {
  width: 140px;
  height: 140px;
  margin: 0 auto 28px auto;
  position: relative;
  border-radius: 50%;
  padding: 4px;
  background: var(--accent-gradient);
  box-shadow: var(--shadow-lg);
  transition: var(--transition-smooth);
}

.hero-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
  border: 4px solid var(--bg-color);
  background-color: var(--bg-color);
  transition: border-color 0.5s ease, var(--transition-smooth);
}

.hero-avatar:hover {
  transform: scale(1.05) rotate(2deg);
  box-shadow: 0 12px 40px rgba(139, 92, 246, 0.4);
}

.hero-tag {
  display: inline-block;
  padding: 6px 16px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 30px;
  font-size: 0.85rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 24px;
  color: var(--accent-secondary);
}

.hero h1 {
  font-size: 3.5rem;
  line-height: 1.1;
  margin-bottom: 16px;
  background: linear-gradient(to right, var(--text-main) 30%, var(--text-muted));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.4rem;
  font-weight: 500;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto 24px auto;
}

.hero-desc {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 800px;
  margin: 0 auto 36px auto;
  line-height: 1.6;
}

.hero-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
}

/* Buttons and Links */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--border-radius-lg);
  font-size: 0.95rem;
  font-weight: 600;
  transition: var(--transition-smooth);
}

.btn-primary {
  background: var(--accent-gradient);
  color: #ffffff;
  box-shadow: 0 4px 15px rgba(139, 92, 246, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(139, 92, 246, 0.4);
}

.btn-secondary {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  color: var(--text-main);
}

.btn-secondary:hover {
  background: var(--card-border);
  transform: translateY(-2px);
}

.social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  color: var(--text-main);
  transition: var(--transition-smooth);
}

.social-link:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  transform: translateY(-2px) scale(1.05);
}

.social-link svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

/* --- FIGMA BUTTONS --- */
.figma-btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 16px 0 24px 0;
}

.figma-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--border-radius-sm);
  color: var(--text-main);
  font-size: 0.9rem;
  font-weight: 600;
  transition: var(--transition-smooth);
  box-shadow: var(--shadow-sm);
}

.figma-btn:hover {
  background: var(--accent-gradient);
  border-color: transparent;
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(139, 92, 246, 0.2);
}

.figma-btn svg {
  width: 14px;
  height: 14px;
  fill: currentColor;
}

/* --- CASE STUDIES GRID --- */
.section-title {
  font-size: 2.2rem;
  margin-bottom: 40px;
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -8px;
  width: 40px;
  height: 4px;
  background: var(--accent-gradient);
  border-radius: 2px;
}

.cases {
  padding: 60px 0 100px 0;
}

.cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 32px;
}

.case-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  height: 100%;
  cursor: pointer;
  transition: var(--transition-smooth);
  position: relative;
}

.case-card:hover {
  transform: translateY(-6px);
  border-color: rgba(139, 92, 246, 0.4);
  box-shadow: var(--shadow-lg);
}

.case-card-img-wrapper {
  position: relative;
  width: 100%;
  padding-top: 56.25%; /* 16:9 ratio */
  overflow: hidden;
  background: #111827;
}

.case-card-img {
 position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
    transition: var(--transition-smooth);
    background-color: #ededed;
}

.case-card-img-boatsman {
 position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-smooth);
}

.case-card:hover .case-card-img {
  transform: scale(1.05);
}

.case-card-content {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.case-card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.case-card-company {
  font-weight: 600;
  text-transform: uppercase;
  color: var(--accent-primary);
  letter-spacing: 0.05em;
}

.case-card h3 {
  font-size: 1.4rem;
  line-height: 1.3;
  margin-bottom: 12px;
  color: var(--text-main);
  font-weight: 700;
}

.case-card p {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 20px;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.case-card-footer {
  margin-top: auto;
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--accent-secondary);
}

.case-card-footer svg {
  transition: var(--transition-smooth);
}

.case-card:hover .case-card-footer svg {
  transform: translateX(4px);
}

/* --- CASE DETAIL MODAL --- */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(7, 9, 14, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  z-index: 1000;
  display: flex;
  justify-content: center;
  align-items: flex-end; /* Mobile bottom sheet, transitions to center/full on desktop */
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s ease;
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: all;
}

.modal-container {
  width: 100%;
  max-width: 1000px;
  height: 90vh;
  background-color: var(--bg-color);
  background-image: var(--bg-gradient);
  border: 1px solid var(--card-border);
  border-bottom: none;
  border-radius: var(--border-radius-lg) var(--border-radius-lg) 0 0;
  box-shadow: 0 -10px 50px rgba(0, 0, 0, 0.8);
  overflow-y: auto;
  transform: translateY(100%);
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
}

.modal-overlay.active .modal-container {
  transform: translateY(0);
}

.modal-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 24px;
  background-color: rgba(7, 9, 14, 0.8);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--card-border);
}

body[data-theme="light"] .modal-header {
  background-color: rgba(248, 250, 252, 0.8);
}

.modal-close-btn {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 50%;
  width: 36px;
  height: 36px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-main);
  transition: var(--transition-smooth);
}

.modal-close-btn:hover {
  background-color: var(--card-border);
  transform: scale(1.1);
}

.modal-content {
  padding: 40px 24px;
  flex-grow: 1;
}

/* --- CASE DETAILED LAYOUT --- */
.case-hero {
  margin-bottom: 40px;
}

.case-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  margin-bottom: 16px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.case-hero-meta span strong {
  color: var(--text-main);
}

.case-hero h2 {
  font-size: 2.8rem;
  line-height: 1.2;
  margin-bottom: 24px;
  background: linear-gradient(to right, var(--text-main), var(--text-muted));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.case-banner {
  width: 100%;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  margin-bottom: 40px;
  border: 1px solid var(--card-border);
}

.case-banner img {
  width: 100%;
  height: auto;
  display: block;
}

.case-body {
  font-size: 1.05rem;
  line-height: 1.7;
}

.case-body p {
  margin-bottom: 24px;
  color: var(--text-muted);
}

.case-body h3 {
  font-size: 1.8rem;
  margin: 48px 0 20px 0;
  color: var(--text-main);
  position: relative;
  display: inline-block;
}

.case-body h3::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 30px;
  height: 3px;
  background: var(--accent-gradient);
  border-radius: 2px;
}

.case-body h4 {
  font-size: 1.3rem;
  margin: 32px 0 16px 0;
  color: var(--text-main);
}

.case-body ul, .case-body ol {
  margin-bottom: 24px;
  padding-left: 20px;
  color: var(--text-muted);
}

.case-body li {
  margin-bottom: 8px;
}

/* --- METRICS CARDS GRID --- */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin: 32px 0;
}

.metric-card {
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.08) 0%, rgba(6, 182, 212, 0.08) 100%);
  border: 1px solid rgba(139, 92, 246, 0.15);
  border-radius: var(--border-radius-lg);
  padding: 24px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-smooth);
}

.metric-card:hover {
  transform: translateY(-2px);
  border-color: rgba(139, 92, 246, 0.3);
}

.metric-value {
  font-family: 'Outfit', sans-serif;
  font-size: 2.5rem;
  font-weight: 800;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.1;
  margin-bottom: 8px;
}

.metric-label {
  font-size: 0.9rem;
  color: var(--text-main);
  font-weight: 600;
  margin-bottom: 4px;
}

.metric-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* --- DYNAMIC RESEARCH CARDS --- */
.research-findings {
  margin: 32px 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.research-card {
  background: var(--card-bg);
  border-left: 4px solid var(--accent-primary);
  border-top: 1px solid var(--card-border);
  border-right: 1px solid var(--card-border);
  border-bottom: 1px solid var(--card-border);
  border-radius: 0 var(--border-radius-lg) var(--border-radius-lg) 0;
  padding: 20px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 16px;
  align-items: center;
}

.research-card-content h5 {
  font-size: 1.1rem;
  margin-bottom: 6px;
  color: var(--text-main);
}

.research-card-content p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--text-muted);
}

.research-badges {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 6px;
}

.badge {
  padding: 4px 10px;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 30px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: inline-block;
}

.badge-critical {
  background-color: rgba(239, 68, 68, 0.15);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.25);
}

.badge-medium {
  background-color: rgba(245, 158, 11, 0.15);
  color: #fbbf24;
  border: 1px solid rgba(245, 158, 11, 0.25);
}

.badge-frequency {
  background-color: rgba(156, 163, 175, 0.15);
  color: var(--text-muted);
  border: 1px solid var(--card-border);
}

/* Hypotheses Grid */
.hypotheses-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 20px 0;
}

.hypothesis-item {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  padding: 16px;
  border-radius: var(--border-radius-sm);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.hypothesis-text {
  font-size: 0.95rem;
  color: var(--text-main);
}

.hypothesis-status {
  font-size: 0.8rem;
  font-weight: 600;
  padding: 4px 8px;
  border-radius: 4px;
}

.status-failed {
  background: rgba(239, 68, 68, 0.1);
  color: #f87171;
}

.status-partial {
  background: rgba(245, 158, 11, 0.1);
  color: #fbbf24;
}

/* --- DETAILED IMAGE GALLERY GRID --- */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin: 32px 0;
}

.gallery-item {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
}

.gallery-item img {
  width: 100%;
  height: auto;
  display: block;
}

.gallery-item-caption {
  padding: 12px 16px;
  font-size: 0.85rem;
  color: var(--text-muted);
  border-top: 1px solid var(--card-border);
}

/* --- FOOTER --- */
footer {
  padding: 80px 0 40px 0;
  border-top: 1px solid var(--card-border);
  text-align: center;
  background-color: rgba(7, 9, 14, 0.2);
}

footer p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: 16px;
}

/* --- A/B TABLE --- */
.ab-table-container {
  overflow-x: auto;
  margin: 24px 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 0.95rem;
  text-align: left;
}

th, td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--card-border);
}

th {
  font-weight: 600;
  color: var(--text-main);
  background-color: var(--card-bg);
}

td {
  color: var(--text-muted);
}

tr:hover {
  background-color: rgba(255, 255, 255, 0.02);
}

/* --- RESPONSIVE BREAKPOINTS --- */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.5rem;
  }
  
  .hero-subtitle {
    font-size: 1.1rem;
  }
  
  .hero-desc {
    font-size: 0.95rem;
  }
  
  .cases-grid {
    grid-template-columns: 1fr;
  }
  
  .modal-container {
    height: 95vh;
  }
  
  .case-hero h2 {
    font-size: 2rem;
  }
  
  .research-card {
    grid-template-columns: 1fr;
    align-items: flex-start;
  }
  
  .research-badges {
    flex-direction: row;
    align-items: center;
  }
}

/* --- ALL PROJECTS SECTION (QUICK FORMAT) --- */
.all-projects {
  padding: 80px 0 100px 0;
  border-top: 1px solid var(--card-border);
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-muted);
  margin: -24px 0 48px 0;
  max-width: 700px;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.project-item-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--border-radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  transition: var(--transition-smooth);
}

.project-item-card:hover {
  transform: translateY(-4px);
  border-color: rgba(139, 92, 246, 0.3);
  box-shadow: var(--shadow-lg);
}

.project-item-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.project-item-year {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent-secondary);
  background-color: rgba(6, 182, 212, 0.1);
  padding: 4px 10px;
  border-radius: 30px;
  border: 1px solid rgba(6, 182, 212, 0.2);
}

.project-item-company {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

.project-item-role {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
  line-height: 1.3;
}

.project-item-task {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 20px;
  line-height: 1.5;
  flex-grow: 1;
}

.project-item-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-primary);
  margin-top: auto;
}

.project-item-link svg {
  transition: var(--transition-smooth);
}

.project-item-card:hover .project-item-link svg {
  transform: translate(2px, -2px);
}