/* ============================================
   NatCap Ventures — Modern Design System
   ============================================ */

/* Local Inter font */
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 300 800;
  font-display: swap;
  src: url('fonts/inter-var.woff2') format('woff2');
}

:root {
  --green-900: #0f2b1f;
  --green-800: #163526;
  --green-700: #1a4030;
  --green-600: #204938;
  --green-500: #2d6a4f;
  --green-400: #40916c;
  --green-300: #52b788;
  --green-200: #95d5b2;
  --green-100: #d8f3dc;
  --green-50:  #f0faf4;

  --neutral-900: #111827;
  --neutral-800: #1f2937;
  --neutral-700: #374151;
  --neutral-600: #4b5563;
  --neutral-500: #6b7280;
  --neutral-400: #9ca3af;
  --neutral-300: #d1d5db;
  --neutral-200: #e5e7eb;
  --neutral-100: #f3f4f6;
  --neutral-50:  #f9fafb;

  --white: #ffffff;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.08), 0 8px 10px -6px rgba(0,0,0,0.04);

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--neutral-700);
  line-height: 1.7;
  font-size: 16px;
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--green-600);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover { color: var(--green-400); }

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

h1, h2, h3, h4 {
  font-family: 'Inter', sans-serif;
  color: var(--neutral-900);
  line-height: 1.2;
  font-weight: 700;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2rem, 4vw, 3rem); margin-bottom: 1rem; }
h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); margin-bottom: 1rem; }
h3 { font-size: clamp(1.125rem, 2vw, 1.5rem); margin-bottom: 0.75rem; }

p { margin-bottom: 1rem; }
p:last-child { margin-bottom: 0; }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 2.5rem);
}

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

/* ---- Fade-in animation ---- */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   Header
   ============================================ */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0,0,0,0.06);
  transition: box-shadow var(--transition);
}

header.scrolled {
  box-shadow: var(--shadow-md);
}

header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo img {
  height: 40px;
  width: auto;
  transition: opacity var(--transition);
}

.logo:hover img { opacity: 0.8; }

nav ul {
  list-style: none;
  display: flex;
  gap: 8px;
}

nav ul li a {
  font-weight: 500;
  font-size: 14px;
  letter-spacing: 0.01em;
  color: var(--neutral-600);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}

nav ul li a:hover {
  color: var(--green-600);
  background: var(--green-50);
}

nav ul li a.active {
  color: var(--green-700);
  background: var(--green-100);
  font-weight: 600;
}

.mobile-toggle {
  display: none;
  background: none;
  border: 1px solid var(--neutral-200);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  font-size: 20px;
  cursor: pointer;
  color: var(--neutral-700);
  transition: all var(--transition);
}

.mobile-toggle:hover {
  background: var(--neutral-100);
}

/* ============================================
   Hero Sections
   ============================================ */
.hero {
  position: relative;
  padding: clamp(100px, 14vw, 160px) 0 clamp(80px, 12vw, 140px);
  text-align: center;
  color: var(--white);
  overflow: hidden;
  margin-top: 72px;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 1;
}

.hero .container { position: relative; z-index: 2; }

.hero h1 {
  color: var(--white);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
}

.hero .subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: rgba(255,255,255,0.85);
  max-width: 680px;
  margin: 0 auto;
  line-height: 1.8;
  font-weight: 300;
}

.hero .tagline {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--green-300);
  margin-bottom: 1rem;
  padding: 6px 16px;
  border: 1px solid rgba(82, 183, 136, 0.3);
  border-radius: 100px;
}

.hero-home {
  background: linear-gradient(160deg, var(--green-900) 0%, var(--green-700) 50%, var(--green-600) 100%);
}

.hero-home::before {
  background: url('images/NatCap-Ventures-2.jpg') center/cover;
  opacity: 0.12;
}

.hero-about {
  background: linear-gradient(160deg, var(--green-900) 0%, var(--green-700) 100%);
}
.hero-about::before {
  background: url('images/NatCap-Ventures-15.jpg') center/cover;
  opacity: 0.15;
}

.hero-why {
  background: linear-gradient(160deg, var(--green-900) 0%, var(--green-600) 100%);
}
.hero-why::before {
  background: url('images/NatCap-Ventures-2.jpg') center/cover;
  opacity: 0.12;
}

.hero-portfolio {
  background: linear-gradient(160deg, var(--green-900) 0%, var(--green-700) 100%);
}
.hero-portfolio::before {
  background: url('images/NatCap-Ventures-2.jpg') center/cover;
  opacity: 0.12;
}

.hero-invest {
  background: linear-gradient(160deg, var(--green-900) 0%, var(--green-600) 100%);
}
.hero-invest::before {
  background: url('images/NatCap-Ventures-21.jpg') center/cover;
  opacity: 0.15;
}

.hero-contact {
  background: linear-gradient(160deg, var(--green-900) 0%, var(--green-700) 100%);
  padding: clamp(80px, 10vw, 120px) 0;
}
.hero-contact::before {
  background: url('images/NatCap-Ventures-28.jpg') center/cover;
  opacity: 0.12;
}

.hero-olga {
  background: linear-gradient(160deg, #1a2e24 0%, var(--green-800) 50%, var(--green-700) 100%);
}
.hero-olga::before {
  background: url('images/NatCap-Ventures-2.jpg') center/cover;
  opacity: 0.1;
}

/* ============================================
   Sections
   ============================================ */
.section {
  padding: clamp(60px, 10vw, 100px) 0;
}

.section-alt {
  background: var(--neutral-50);
}

.section-dark {
  background: var(--green-800);
  color: var(--white);
}

.section-dark h2,
.section-dark h3 { color: var(--white); }
.section-dark p { color: rgba(255,255,255,0.8); }

.section-header {
  max-width: 680px;
  margin: 0 auto 3rem;
  text-align: center;
}

.section-header p {
  font-size: 1.125rem;
  color: var(--neutral-500);
  line-height: 1.8;
}

.section-label {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--green-500);
  margin-bottom: 0.75rem;
}

/* ============================================
   Grid
   ============================================ */
.grid {
  display: grid;
  gap: 24px;
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-2-1 { grid-template-columns: 3fr 2fr; }

/* ============================================
   Buttons
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  font-size: 15px;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
  font-family: inherit;
  letter-spacing: 0.01em;
}

.btn-primary {
  background: var(--green-600);
  color: var(--white);
  box-shadow: 0 1px 3px rgba(32,73,56,0.3);
}

.btn-primary:hover {
  background: var(--green-500);
  color: var(--white);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(32,73,56,0.3);
}

.btn-outline {
  background: transparent;
  color: var(--green-600);
  border: 1.5px solid var(--green-600);
}

.btn-outline:hover {
  background: var(--green-600);
  color: var(--white);
  transform: translateY(-1px);
}

.btn-white {
  background: var(--white);
  color: var(--green-700);
  box-shadow: var(--shadow-md);
}

.btn-white:hover {
  color: var(--green-600);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

.btn-arrow::after {
  content: '\2192';
  transition: transform var(--transition);
}

.btn-arrow:hover::after {
  transform: translateX(4px);
}

/* ============================================
   Cards
   ============================================ */
.card {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 32px;
  border: 1px solid var(--neutral-200);
  transition: all var(--transition);
}

.card:hover {
  border-color: var(--green-200);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.card-icon {
  width: 48px;
  height: 48px;
  background: var(--green-50);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  font-size: 24px;
}

/* ============================================
   Contact Form
   ============================================ */
.contact-form {
  max-width: 480px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--neutral-700);
  margin-bottom: 6px;
}

.form-input {
  width: 100%;
  padding: 14px 16px;
  border: 1.5px solid var(--neutral-200);
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-family: inherit;
  color: var(--neutral-800);
  background: var(--white);
  transition: all var(--transition);
  outline: none;
}

.form-input:focus {
  border-color: var(--green-400);
  box-shadow: 0 0 0 3px rgba(45, 106, 79, 0.1);
}

.form-input::placeholder {
  color: var(--neutral-400);
}

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

/* ============================================
   Portfolio
   ============================================ */
.portfolio-card {
  background: var(--white);
  border: 1px solid var(--neutral-200);
  border-radius: var(--radius-md);
  padding: 40px;
  transition: all var(--transition);
  overflow: hidden;
}

.portfolio-card:hover {
  border-color: var(--green-200);
  box-shadow: var(--shadow-lg);
}

.portfolio-card .logo-wrap {
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
}

.portfolio-card .logo-wrap img {
  max-height: 60px;
  width: auto;
  margin: 0 auto;
}

.portfolio-card p {
  font-size: 15px;
  color: var(--neutral-600);
  line-height: 1.75;
}

.portfolio-card .highlight {
  font-weight: 600;
  color: var(--neutral-800);
}

/* ============================================
   Carbon / Non-Carbon Stacks
   ============================================ */
.stack-section { padding: 32px; }

.stack-section h3 {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--green-200);
}

.stack-row {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--neutral-100);
  transition: all var(--transition);
}

.stack-row:last-child { border-bottom: none; }

.stack-row:hover {
  padding-left: 8px;
}

.stack-row img {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-sm);
  object-fit: cover;
}

.stack-row span {
  font-size: 15px;
  font-weight: 600;
  color: var(--neutral-800);
}

/* ============================================
   Team
   ============================================ */
.team-card {
  text-align: center;
  padding: 40px 24px;
  background: var(--white);
  border: 1px solid var(--neutral-200);
  border-radius: var(--radius-md);
  transition: all var(--transition);
}

.team-card:hover {
  border-color: var(--green-200);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.team-card img {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 20px;
  border: 3px solid var(--green-100);
}

.team-card h3 {
  margin-bottom: 4px;
  font-size: 1.125rem;
}

.team-card .role {
  font-size: 13px;
  font-weight: 600;
  color: var(--green-600);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 12px;
}

.team-card .bio {
  font-size: 14px;
  color: var(--neutral-500);
  line-height: 1.7;
  margin-bottom: 16px;
}

.team-card .linkedin-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--green-600);
  padding: 6px 14px;
  border: 1px solid var(--green-200);
  border-radius: 100px;
  transition: all var(--transition);
}

.team-card .linkedin-link:hover {
  background: var(--green-50);
  border-color: var(--green-400);
}

/* ============================================
   Natural Assets
   ============================================ */
.asset-card {
  text-align: center;
  padding: 32px 16px;
  background: var(--white);
  border: 1px solid var(--neutral-200);
  border-radius: var(--radius-md);
  transition: all var(--transition);
}

.asset-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--green-200);
}

.asset-card img {
  width: 80px;
  height: auto;
  margin: 0 auto 12px;
}

.asset-card p {
  font-weight: 700;
  color: var(--neutral-800);
  font-size: 15px;
}

/* ============================================
   Invest Columns
   ============================================ */
.value-card {
  padding: 36px;
  background: var(--white);
  border: 1px solid var(--neutral-200);
  border-radius: var(--radius-md);
  transition: all var(--transition);
}

.value-card:hover {
  border-color: var(--green-200);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.value-card p {
  font-size: 15px;
  color: var(--neutral-600);
  line-height: 1.75;
}

/* ============================================
   Feature Lists
   ============================================ */
.feature-card {
  padding: 36px;
  background: var(--white);
  border: 1px solid var(--neutral-200);
  border-radius: var(--radius-md);
  transition: all var(--transition);
}

.feature-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--green-200);
}

.feature-card h3 {
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--green-100);
}

.feature-list {
  list-style: none;
  padding: 0;
}

.feature-list li {
  padding: 10px 0 10px 28px;
  position: relative;
  font-size: 15px;
  color: var(--neutral-600);
  border-bottom: 1px solid var(--neutral-100);
}

.feature-list li:last-child { border-bottom: none; }

.feature-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 16px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green-400);
}

/* ============================================
   Sustainability Cards
   ============================================ */
.sustainability-card {
  padding: 36px;
  border: 1px solid var(--neutral-200);
  border-radius: var(--radius-md);
  background: var(--white);
  transition: all var(--transition);
  text-align: center;
}

.sustainability-card:hover {
  border-color: var(--green-200);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.sustainability-card p {
  color: var(--neutral-600);
  line-height: 1.75;
}

/* ============================================
   Quote
   ============================================ */
.quote-block {
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
  padding: 20px 0;
}

.quote-block blockquote {
  font-size: clamp(1rem, 2vw, 1.25rem);
  font-style: italic;
  color: var(--neutral-600);
  line-height: 1.9;
  position: relative;
  padding: 0 20px;
}

.quote-block blockquote::before {
  content: '\201C';
  font-size: 4rem;
  color: var(--green-200);
  position: absolute;
  top: -20px;
  left: -10px;
  font-family: Georgia, serif;
  line-height: 1;
}

.quote-block cite {
  display: block;
  margin-top: 20px;
  font-style: normal;
  font-size: 14px;
  font-weight: 500;
  color: var(--neutral-400);
}

/* ============================================
   Contact Info
   ============================================ */
.contact-details h2 {
  margin-bottom: 2rem;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 24px;
  padding: 20px;
  background: var(--neutral-50);
  border-radius: var(--radius-md);
  transition: all var(--transition);
}

.contact-item:hover {
  background: var(--green-50);
}

.contact-icon {
  width: 44px;
  height: 44px;
  background: var(--green-100);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}

.contact-item-text {
  font-size: 16px;
  color: var(--neutral-700);
  font-weight: 500;
}

.contact-item-text small {
  display: block;
  font-size: 13px;
  color: var(--neutral-400);
  font-weight: 400;
  margin-bottom: 2px;
}

/* ============================================
   Image treatments
   ============================================ */
.img-rounded {
  border-radius: var(--radius-md);
  overflow: hidden;
}

.img-feature {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
}

/* ============================================
   Stat / Metric highlights
   ============================================ */
.stats-row {
  display: flex;
  gap: 48px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 2rem;
}

.stat {
  text-align: center;
}

.stat .number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--green-600);
  letter-spacing: -0.03em;
}

.stat .label {
  font-size: 14px;
  color: var(--neutral-500);
  margin-top: 4px;
}

/* ============================================
   Footer
   ============================================ */
footer {
  background: var(--green-900);
  color: var(--white);
  padding: 60px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 40px;
  align-items: start;
  margin-bottom: 40px;
}

.footer-brand p {
  color: rgba(255,255,255,0.5);
  font-size: 14px;
  margin-top: 12px;
  max-width: 280px;
}

.footer-nav {
  display: flex;
  gap: 28px;
}

.footer-nav a {
  color: rgba(255,255,255,0.6);
  font-size: 14px;
  font-weight: 500;
  transition: color var(--transition);
}

.footer-nav a:hover { color: var(--white); }

.footer-social {
  display: flex;
  gap: 10px;
  justify-content: center;
  margin-bottom: 24px;
}

.footer-social a {
  color: rgba(255,255,255,0.7);
  font-size: 13px;
  font-weight: 500;
  padding: 8px 18px;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 100px;
  transition: all var(--transition);
}

.footer-social a:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.3);
  color: var(--white);
}

.footer-divider {
  border: none;
  border-top: 1px solid rgba(255,255,255,0.1);
  margin: 24px 0;
}

.footer-bottom {
  text-align: center;
  font-size: 13px;
  color: rgba(255,255,255,0.4);
  line-height: 1.7;
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4, .grid-2-1 {
    grid-template-columns: 1fr;
  }

  nav ul { display: none; }
  .mobile-toggle { display: block; }

  nav.open ul {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(20px);
    padding: 16px 24px;
    box-shadow: var(--shadow-lg);
    gap: 4px;
  }

  .hero { padding: clamp(80px, 12vw, 120px) 0 clamp(60px, 10vw, 100px); }

  .footer-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .footer-nav {
    flex-wrap: wrap;
    justify-content: center;
  }

  .footer-social { flex-wrap: wrap; justify-content: center; }

  .stats-row { gap: 32px; }
}

@media (max-width: 480px) {
  .footer-social a { padding: 6px 14px; font-size: 12px; }
}