/* ========================================
   Pioneer Effect - Decentralized Research Consulting
   Modern, Professional Design System
   ======================================== */

/* CSS Variables */
:root {
  /* Colors - Deep teal primary with warm accents */
  --color-primary: #0d5c63;
  --color-primary-dark: #094147;
  --color-primary-light: #147a82;
  --color-accent: #c9a227;
  --color-accent-light: #e8c547;

  /* Neutrals */
  --color-text: #1a1a2e;
  --color-text-light: #4a4a5c;
  --color-text-muted: #6b6b7d;
  --color-bg: #ffffff;
  --color-bg-alt: #f8f9fa;
  --color-bg-warm: #fdfcf9;
  --color-border: #e8e8ec;
  --color-border-light: #f0f0f4;

  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-display: 'Playfair Display', Georgia, serif;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;

  /* Border radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.12);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-primary);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.3;
  margin: 0 0 var(--space-sm) 0;
  color: var(--color-text);
}

h1 { font-size: clamp(2rem, 4vw, 3rem); }
h2 { font-size: clamp(1.75rem, 3vw, 2.25rem); }
h3 { font-size: 1.25rem; font-family: var(--font-primary); font-weight: 600; }
h4 { font-size: 1.125rem; font-family: var(--font-primary); font-weight: 600; }

p {
  margin: 0 0 var(--space-sm) 0;
  color: var(--color-text-light);
}

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

a:hover {
  color: var(--color-primary-light);
}

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

/* Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.875rem 1.75rem;
  font-family: var(--font-primary);
  font-size: 0.9375rem;
  font-weight: 500;
  text-decoration: none;
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-base);
}

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

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

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

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

.btn-full {
  width: 100%;
}

/* Navigation */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background-color: transparent;
  transition: all var(--transition-base);
}

.nav.scrolled {
  background-color: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-md);
  padding-bottom: var(--space-md);
}

.logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  text-decoration: none;
}

.nav.scrolled .logo,
.nav-links a {
  color: var(--color-text);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.nav-links a {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-light);
  transition: color var(--transition-fast);
}

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

.nav-cta {
  padding: 0.625rem 1.25rem;
  background-color: var(--color-primary);
  color: white !important;
  border-radius: var(--radius-md);
}

.nav-cta:hover {
  background-color: var(--color-primary-dark);
  color: white !important;
}

/* Mobile Menu Button */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  background: none;
  border: none;
  cursor: pointer;
}

.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text);
  transition: all var(--transition-fast);
}

.mobile-menu-btn.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-btn.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Hero Section */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: calc(80px + var(--space-3xl)) 0 var(--space-3xl);
  background: linear-gradient(135deg, #f8fafa 0%, #eef5f5 50%, #e8f0f0 100%);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0;
  right: 0;
  width: 50%;
  height: 100%;
  background: linear-gradient(135deg, rgba(13, 92, 99, 0.03) 0%, rgba(13, 92, 99, 0.08) 100%);
  clip-path: polygon(20% 0, 100% 0, 100% 100%, 0% 100%);
}

.hero-content {
  position: relative;
  max-width: 720px;
}

.hero-label {
  display: inline-block;
  padding: 0.5rem 1rem;
  margin-bottom: var(--space-md);
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-primary);
  background-color: rgba(13, 92, 99, 0.1);
  border-radius: var(--radius-sm);
}

.hero h1 {
  margin-bottom: var(--space-md);
  color: var(--color-text);
}

.hero-subtitle {
  font-size: 1.25rem;
  line-height: 1.8;
  color: var(--color-text-light);
  margin-bottom: var(--space-xl);
}

.hero-actions {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

/* Section Styling */
section {
  padding: var(--space-3xl) 0;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--space-2xl);
}

.section-label {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}

.section-header h2 {
  margin-bottom: var(--space-md);
}

.section-desc {
  font-size: 1.125rem;
  color: var(--color-text-muted);
}

/* Value Proposition Section */
.value-prop {
  padding: var(--space-2xl) 0;
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border-light);
}

.value-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.value-item {
  text-align: center;
  padding: var(--space-lg);
}

.value-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  margin-bottom: var(--space-md);
  background-color: rgba(13, 92, 99, 0.08);
  border-radius: 50%;
  color: var(--color-primary);
}

.value-item h3 {
  margin-bottom: var(--space-xs);
  color: var(--color-text);
}

.value-item p {
  font-size: 0.9375rem;
  margin: 0;
}

/* Services Section */
.services {
  background-color: var(--color-bg-alt);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
}

.service-card {
  background-color: var(--color-bg);
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
}

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

.service-number {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  color: rgba(13, 92, 99, 0.15);
  margin-bottom: var(--space-sm);
}

.service-card h3 {
  margin-bottom: var(--space-md);
  color: var(--color-text);
}

.service-card ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.service-card li {
  position: relative;
  padding-left: 1.5rem;
  font-size: 0.9375rem;
  color: var(--color-text-light);
}

.service-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.5rem;
  width: 6px;
  height: 6px;
  background-color: var(--color-primary);
  border-radius: 50%;
}

/* Process Section */
.process {
  background-color: var(--color-bg);
}

.process-timeline {
  max-width: 800px;
  margin: 0 auto;
}

.process-step {
  display: flex;
  gap: var(--space-lg);
  padding: var(--space-lg) 0;
  position: relative;
}

.process-step:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 23px;
  top: calc(var(--space-lg) + 48px);
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--color-primary), var(--color-border));
}

.step-marker {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background-color: var(--color-primary);
  color: white;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  border-radius: 50%;
}

.step-content h3 {
  margin-bottom: var(--space-xs);
}

.step-content p {
  margin: 0;
}

/* Audience Section */
.audience {
  background-color: var(--color-bg-alt);
}

.audience-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
}

.audience-card {
  padding: var(--space-lg);
  background-color: var(--color-bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  text-align: center;
  transition: all var(--transition-base);
}

.audience-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-md);
}

.audience-card h3 {
  font-size: 1.125rem;
  margin-bottom: var(--space-xs);
}

.audience-card p {
  font-size: 0.9375rem;
  margin: 0;
}

/* Approach Section */
.approach {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: white;
}

.approach-content {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

.approach .section-label {
  color: var(--color-accent-light);
}

.approach h2 {
  color: white;
  margin-bottom: var(--space-lg);
}

.approach-text p {
  color: rgba(255, 255, 255, 0.85);
  font-size: 1.0625rem;
}

.approach-values {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.approach-value {
  padding: var(--space-md);
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--color-accent);
}

.approach-value h4 {
  color: white;
  margin-bottom: var(--space-xs);
}

.approach-value p {
  font-size: 0.9375rem;
  margin: 0;
  color: rgba(255, 255, 255, 0.8);
}

/* Why Us Section */
.why-us {
  background-color: var(--color-bg);
}

.why-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
  max-width: 900px;
  margin: 0 auto;
}

.why-item {
  display: flex;
  gap: var(--space-md);
  padding: var(--space-lg);
  background-color: var(--color-bg-alt);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.why-item:hover {
  background-color: var(--color-bg-warm);
  box-shadow: var(--shadow-sm);
}

.why-check {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background-color: rgba(13, 92, 99, 0.1);
  color: var(--color-primary);
  border-radius: 50%;
}

.why-item h4 {
  margin-bottom: var(--space-xs);
}

.why-item p {
  font-size: 0.9375rem;
  margin: 0;
}

/* About Section */
.about {
  background-color: var(--color-bg-warm);
}

.about-content {
  max-width: 800px;
  margin: 0 auto;
}

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

.about .section-label {
  display: block;
}

.about h2 {
  margin-bottom: var(--space-lg);
}

.about p {
  font-size: 1.0625rem;
  text-align: left;
}

/* Contact Section */
.contact {
  background-color: var(--color-bg-alt);
}

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

.contact-info h2 {
  margin-bottom: var(--space-md);
}

.contact-info > p {
  font-size: 1.0625rem;
}

.contact-email {
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
}

.contact-email p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-xs);
}

.contact-email a {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-primary);
}

.contact-form-wrapper {
  background-color: var(--color-bg);
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

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

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

.form-group label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text);
}

.contact-form input,
.contact-form textarea {
  padding: 0.875rem 1rem;
  font-family: var(--font-primary);
  font-size: 1rem;
  color: var(--color-text);
  background-color: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  background-color: var(--color-bg);
  box-shadow: 0 0 0 3px rgba(13, 92, 99, 0.1);
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
  color: var(--color-text-muted);
}

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

.contact-form button {
  margin-top: var(--space-sm);
}

/* Footer */
.footer {
  background-color: var(--color-text);
  color: white;
  padding: var(--space-2xl) 0 var(--space-lg);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand .logo {
  color: white;
  margin-bottom: var(--space-xs);
  display: block;
}

.footer-brand p {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.6);
  margin: 0;
}

.footer-links {
  display: flex;
  gap: var(--space-lg);
}

.footer-links a {
  font-size: 0.9375rem;
  color: rgba(255, 255, 255, 0.7);
}

.footer-links a:hover {
  color: white;
}

.footer-bottom {
  padding-top: var(--space-lg);
  text-align: center;
}

.footer-bottom p {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.5);
  margin: 0;
}

/* Responsive Design */
@media (max-width: 1024px) {
  .services-grid {
    grid-template-columns: 1fr;
  }

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

  .approach-content {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

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

@media (max-width: 768px) {
  :root {
    --space-3xl: 4rem;
  }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    flex-direction: column;
    justify-content: center;
    gap: var(--space-lg);
    background-color: var(--color-bg);
    box-shadow: var(--shadow-xl);
    transition: right var(--transition-base);
  }

  .nav-links.active {
    right: 0;
  }

  .nav-links a {
    font-size: 1.125rem;
  }

  .mobile-menu-btn {
    display: flex;
    z-index: 1001;
  }

  .hero {
    min-height: auto;
    padding-top: calc(80px + var(--space-2xl));
  }

  .hero-bg {
    display: none;
  }

  .hero-actions {
    flex-direction: column;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .value-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .audience-grid {
    grid-template-columns: 1fr;
  }

  .why-grid {
    grid-template-columns: 1fr;
  }

  .footer-content {
    flex-direction: column;
    gap: var(--space-lg);
    text-align: center;
  }

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

@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-md);
  }

  .service-card {
    padding: var(--space-lg);
  }

  .process-step {
    flex-direction: column;
    gap: var(--space-md);
  }

  .process-step:not(:last-child)::after {
    display: none;
  }

  .contact-form-wrapper {
    padding: var(--space-lg);
  }
}