/* ===== CSS Variables ===== */
:root {
  --color-bg: #0a0e17;
  --color-bg-elevated: #111827;
  --color-bg-card: #1a2234;
  --color-primary: #00d4aa;
  --color-primary-dim: #00a884;
  --color-accent: #6366f1;
  --color-accent-glow: rgba(99, 102, 241, 0.3);
  --color-text: #f1f5f9;
  --color-text-muted: #94a3b8;
  --color-border: rgba(148, 163, 184, 0.1);
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Outfit', sans-serif;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --shadow-glow: 0 0 60px rgba(0, 212, 170, 0.15);
  --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: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  overflow-x: hidden;
}

/* ===== Navigation ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 1rem 2rem;
  background: rgba(10, 14, 23, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  transition: var(--transition);
}

.navbar.scrolled {
  background: rgba(10, 14, 23, 0.95);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.logo-img {
  height: 88px;
  width: auto;
  display: block;
}

.logo-accent {
  color: var(--color-primary);
}

.footer-logo {
  height: 80px;
  opacity: 0.95;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav-links a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition);
}

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

.nav-cta {
  background: var(--color-primary);
  color: var(--color-bg);
  border: none;
  padding: 0.6rem 1.4rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-family: var(--font-body);
  cursor: pointer;
  transition: var(--transition);
}

.nav-cta:hover {
  background: var(--color-primary-dim);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

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

.mobile-menu-btn span {
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: var(--transition);
}

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--color-bg-elevated);
    flex-direction: column;
    padding: 2rem;
    gap: 1rem;
    border-bottom: 1px solid var(--color-border);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    display: flex !important; /* Override display:none when menu opens */
  }

  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
}

/* ===== Hero Section ===== */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: 8rem 2rem 4rem;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.25;
}

.hero-gradient {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--color-bg) 0%, transparent 50%, var(--color-bg) 100%);
  background: linear-gradient(180deg, var(--color-bg) 0%, transparent 40%, var(--color-bg) 90%);
}

.hero-pattern {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 50% 50%, rgba(0, 212, 170, 0.05) 0%, transparent 50%);
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 800px;
}

.hero-badge {
  display: inline-block;
  padding: 0.4rem 1rem;
  background: rgba(0, 212, 170, 0.15);
  border: 1px solid rgba(0, 212, 170, 0.3);
  border-radius: 100px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-primary);
  margin-bottom: 1.5rem;
  letter-spacing: 0.5px;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 1.5rem;
}

.title-line {
  display: block;
}

.title-accent {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--color-text-muted);
  margin-bottom: 2.5rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-cta {
  margin-bottom: 4rem;
}

.download-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 2.5rem;
  background: linear-gradient(135deg, var(--color-primary), #00b894);
  color: var(--color-bg);
  font-size: 1.2rem;
  font-weight: 700;
  text-decoration: none;
  border-radius: var(--radius-lg);
  transition: var(--transition);
  box-shadow: 0 4px 30px rgba(0, 212, 170, 0.4);
}

.download-btn:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: 0 8px 40px rgba(0, 212, 170, 0.5);
}

.download-icon {
  width: 24px;
  height: 24px;
}

.download-note {
  margin-top: 1rem;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.hero-scroll {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

.scroll-indicator {
  width: 24px;
  height: 40px;
  border: 2px solid var(--color-text-muted);
  border-radius: 12px;
  position: relative;
  overflow: hidden;
}

.scroll-indicator::after {
  content: '';
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 8px;
  background: var(--color-primary);
  border-radius: 2px;
  animation: scroll-bounce 2s infinite;
}

@keyframes scroll-bounce {
  0%, 100% { opacity: 1; transform: translateX(-50%) translateY(0); }
  50% { opacity: 0.5; transform: translateX(-50%) translateY(8px); }
}

/* ===== Animations ===== */
.animate-fade-in {
  animation: fadeIn 0.8s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

[data-aos] {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 1.2s ease, transform 1.2s ease;
}

[data-aos].aos-animate {
  opacity: 1;
  transform: translateY(0);
}

[data-aos="fade-right"] {
  transform: translateX(-30px);
  transition: opacity 1.2s ease, transform 1.2s ease;
}

[data-aos="fade-right"].aos-animate {
  transform: translateX(0);
}

[data-aos="zoom-in"] {
  transform: scale(0.95);
  transition: opacity 1.2s ease, transform 1.2s ease;
}

[data-aos="zoom-in"].aos-animate {
  transform: scale(1);
}

/* ===== Container ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* ===== PSE Section ===== */
.pse-section {
  padding: 4rem 0;
  background: var(--color-bg-elevated);
}

.pse-brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.pse-logo {
  height: 60px;
  width: auto;
  filter: brightness(1.1);
}

.pse-tagline {
  color: var(--color-text-muted);
  font-size: 1rem;
}

/* ===== Features Section ===== */
.features {
  padding: 6rem 0;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  text-align: center;
  margin-bottom: 0.75rem;
}

.section-subtitle {
  text-align: center;
  color: var(--color-text-muted);
  font-size: 1.1rem;
  margin-bottom: 4rem;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.feature-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: var(--transition);
}

.feature-card:hover {
  border-color: rgba(0, 212, 170, 0.3);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.feature-card-wide {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 2rem;
  align-items: center;
}

.feature-icon {
  width: 48px;
  height: 48px;
  background: rgba(0, 212, 170, 0.15);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
}

.feature-card-wide .feature-icon {
  margin-bottom: 0;
}

.feature-icon svg {
  width: 24px;
  height: 24px;
  color: var(--color-primary);
}

.feature-card h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.feature-card p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* ===== How It Works ===== */
.how-it-works {
  padding: 6rem 0;
  background: var(--color-bg-elevated);
}

.steps {
  max-width: 600px;
  margin: 0 auto;
}

.step {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
  padding: 2rem 0;
  border-bottom: 1px solid var(--color-border);
}

.step:last-child {
  border-bottom: none;
}

.step-number {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
  opacity: 0.6;
  min-width: 60px;
  text-align: right;
}

.step-content h3 {
  font-size: 1.25rem;
  margin-bottom: 0.25rem;
}

.step-content p {
  color: var(--color-text-muted);
}

/* ===== PSE Image Section ===== */
.pse-image-section {
  padding: 4rem 0;
}

.pse-image-card {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  aspect-ratio: 21/9;
}

.pse-image-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.pse-image-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 2rem 2.5rem;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.9));
  color: white;
}

.pse-image-overlay p {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.pse-image-overlay span {
  font-size: 0.9rem;
  opacity: 0.8;
}

/* ===== Experts Section ===== */
.experts {
  padding: 6rem 0;
  background: var(--color-bg-elevated);
}

.experts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
}

.expert-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
  padding: 1.25rem;
}

.expert-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 212, 170, 0.2);
  box-shadow: var(--shadow-glow);
}

.expert-image {
  flex-shrink: 0;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  overflow: hidden;
}

.expert-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition);
}

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

.expert-info {
  padding: 0;
  flex: 1;
  min-width: 0;
}

.expert-info h4 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  margin-bottom: 0.25rem;
}

.expert-info span {
  font-size: 0.85rem;
  color: var(--color-primary);
  display: block;
  margin-bottom: 0.75rem;
}

.expert-info p {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  font-style: italic;
}

/* ===== Download Section ===== */
.download-section {
  padding: 6rem 0;
}

.download-card {
  background: linear-gradient(135deg, var(--color-bg-card) 0%, var(--color-bg-elevated) 100%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 4rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  box-shadow: var(--shadow-glow);
}

.download-content h2 {
  font-family: var(--font-display);
  font-size: 2rem;
  margin-bottom: 1rem;
}

.download-content p {
  color: var(--color-text-muted);
  margin-bottom: 2rem;
}

.download-btn-large {
  display: inline-flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem 2.5rem;
  background: linear-gradient(135deg, var(--color-primary), #00b894);
  color: var(--color-bg);
  font-size: 1.25rem;
  font-weight: 700;
  text-decoration: none;
  border-radius: var(--radius-lg);
  transition: var(--transition);
  box-shadow: 0 4px 30px rgba(0, 212, 170, 0.4);
}

.download-btn-large:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: 0 8px 50px rgba(0, 212, 170, 0.5);
}

.download-btn-large .download-icon {
  width: 28px;
  height: 28px;
}

.download-visual {
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.download-visual img {
  width: 100%;
  height: auto;
  display: block;
}

/* ===== Contact Section ===== */
.contact {
  padding: 6rem 0;
  background: var(--color-bg-elevated);
}

.contact-card {
  max-width: 500px;
  margin: 0 auto;
  text-align: center;
  padding: 3rem;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.contact-email {
  display: inline-block;
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-primary);
  text-decoration: none;
  margin-bottom: 0.5rem;
  transition: color var(--transition);
}

.contact-email:hover {
  color: var(--color-primary-dim);
}

.contact-card p {
  color: var(--color-text-muted);
}

/* ===== Footer ===== */
.footer {
  padding: 4rem 0 2rem;
  border-top: 1px solid var(--color-border);
}

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

.footer-brand {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.footer-tagline {
  color: var(--color-text-muted);
  margin-bottom: 2rem;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-links a {
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition);
}

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

.footer-copy {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  opacity: 0.7;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .nav-cta {
    display: none;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .download-card {
    grid-template-columns: 1fr;
    padding: 2rem;
  }

  .download-visual {
    order: -1;
  }

  .feature-card-wide {
    grid-template-columns: 1fr;
  }

  .step {
    flex-direction: column;
    gap: 1rem;
  }

  .step-number {
    text-align: left;
  }
}