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

:root {
  --bg: #03140f;
  --bg-soft: #06231a;
  --card: rgba(9, 40, 30, 0.86);
  --card-strong: #0b2f24;
  --text: #f3fff9;
  --muted: #a7c8bb;
  --primary: #34d399;
  --primary-strong: #10b981;
  --primary-soft: rgba(52, 211, 153, 0.14);
  --border: rgba(167, 243, 208, 0.16);
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.38);
  --radius: 22px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-title: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 90px;
}

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg);
}
::-webkit-scrollbar-thumb {
  background: var(--card-strong);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--primary-strong);
}

/* Background Gradients */
.glow-bg {
  position: absolute;
  top: -10%;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 1400px;
  height: 800px;
  background: radial-gradient(circle, rgba(52, 211, 153, 0.07) 0%, rgba(3, 20, 15, 0) 70%);
  z-index: -1;
  pointer-events: none;
}

/* --- Layout --- */
.container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 20px;
}

section {
  padding: 86px 0;
  position: relative;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.card {
  border-radius: var(--radius);
  padding: 28px;
  background: var(--card);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: var(--transition);
}

.card:hover {
  transform: translateY(-5px);
  border-color: rgba(52, 211, 153, 0.3);
  box-shadow: 0 15px 30px rgba(52, 211, 153, 0.06), var(--shadow);
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-title);
  color: #ffffff;
  font-weight: 700;
  line-height: 1.25;
}

h2 {
  font-size: 32px;
  margin-bottom: 12px;
  text-align: center;
}

.section-desc {
  font-size: 15px;
  color: var(--muted);
  text-align: center;
  max-width: 680px;
  margin: 0 auto 52px auto;
  line-height: 1.6;
}

p {
  color: var(--muted);
}

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

a:hover {
  color: #ffffff;
}

/* --- Navigation Header --- */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  border-bottom: 1px solid var(--border);
  background: rgba(3, 20, 15, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: var(--transition);
}

header.scrolled {
  background: rgba(3, 20, 15, 0.95);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo-text {
  font-size: 21px;
  font-weight: 800;
  font-family: var(--font-title);
  background: linear-gradient(135deg, #ffffff 40%, var(--primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 16px;
  list-style: none;
}

.nav-item a {
  font-size: 14px;
  font-weight: 500;
  color: var(--muted);
  padding: 8px 12px;
  border-radius: 8px;
}

.nav-item a:hover {
  color: var(--primary);
  background: var(--primary-soft);
}

.nav-item a.nav-cta {
  background: var(--primary);
  color: var(--bg);
  font-weight: 600;
  padding: 10px 20px;
  border-radius: 30px;
}

.nav-item a.nav-cta:hover {
  background: #ffffff;
  color: var(--bg);
  box-shadow: 0 0 15px rgba(52, 211, 153, 0.3);
}

/* Mobile Nav Toggle */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  position: relative;
  z-index: 1001;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: #ffffff;
  margin-bottom: 6px;
  transition: var(--transition);
}

.nav-toggle span:last-child {
  margin-bottom: 0;
}

.nav-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 6px);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -6px);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 15px;
  padding: 13px 26px;
  border-radius: 30px;
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid transparent;
  gap: 8px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-strong) 100%);
  color: var(--bg);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #ffffff 0%, var(--primary) 100%);
  color: var(--bg);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(52, 211, 153, 0.3);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}

.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-soft);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 13px;
  border-radius: 20px;
}

/* --- Hero Section --- */
#hero {
  padding-top: 150px;
  padding-bottom: 96px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 40px;
  align-items: center;
}

.hero-content {
  text-align: left;
}

.hero-badge-container {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

.badge {
  background: var(--primary-soft);
  border: 1px solid var(--border);
  color: var(--primary);
  font-size: 12px;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: 30px;
  letter-spacing: 0.5px;
}

.hero-title {
  font-size: 44px;
  font-family: var(--font-title);
  line-height: 1.2;
  margin-bottom: 20px;
  background: linear-gradient(135deg, #ffffff 40%, var(--primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: 16px;
  color: var(--muted);
  line-height: 1.7;
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-data-card {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  background: var(--card-strong);
  border-radius: var(--radius);
  padding: 24px;
  border: 1px solid var(--border);
}

.data-item {
  text-align: center;
  padding: 14px 10px;
  background: rgba(3, 20, 15, 0.4);
  border: 1px solid rgba(167, 243, 208, 0.05);
  border-radius: 14px;
}

.data-icon {
  font-size: 22px;
  margin-bottom: 6px;
}

.data-label {
  font-size: 13.5px;
  font-weight: 600;
  color: #ffffff;
}

.data-sub {
  font-size: 11px;
  color: var(--primary);
  margin-top: 4px;
}

/* --- Section: Advantages --- */
#advantages {
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-soft) 100%);
}

.advantage-card h3 {
  font-size: 19px;
  margin-bottom: 12px;
}

.advantage-card p {
  font-size: 13.5px;
  line-height: 1.6;
}

/* --- Section: Pricing --- */
#pricing {
  background: var(--bg);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}

.pricing-card {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.pricing-header {
  margin-bottom: 20px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

.pricing-title {
  font-size: 21px;
  margin-bottom: 6px;
}

.pricing-tagline {
  font-size: 12.5px;
  color: var(--muted);
}

.price-box {
  margin: 16px 0;
}

.price {
  font-size: 21px;
  font-family: var(--font-title);
  color: var(--primary);
  font-weight: 700;
}

.pricing-features {
  list-style: none;
  margin-bottom: 24px;
  flex-grow: 1;
}

.pricing-features li {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.pricing-features li::before {
  content: "✓";
  color: var(--primary);
  font-weight: bold;
}

/* Highlighted Plan */
.pricing-card.popular {
  border-color: var(--primary);
  background: radial-gradient(circle at top right, rgba(52, 211, 153, 0.1), var(--card));
}

.popular-badge {
  position: absolute;
  top: 15px;
  right: 15px;
  background: var(--primary);
  color: var(--bg);
  font-size: 9.5px;
  font-weight: 700;
  padding: 3px 9px;
  border-radius: 12px;
}

/* --- Section: Tutorials --- */
#tutorials {
  background: linear-gradient(180deg, var(--bg-soft) 0%, var(--bg) 100%);
}

.tutorial-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.tutorial-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.tutorial-icon {
  font-size: 24px;
}

.tutorial-card h3 {
  font-size: 17.5px;
}

.tutorial-card p {
  font-size: 13.5px;
  margin-bottom: 20px;
  flex-grow: 1;
}

/* --- Section: Knowledge --- */
#knowledge {
  background: var(--bg);
}

.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.article-card {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.article-meta {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.article-card h3 {
  font-size: 16.5px;
  line-height: 1.4;
  margin-bottom: 10px;
}

.article-card p {
  font-size: 13px;
  line-height: 1.5;
  margin-bottom: 20px;
  flex-grow: 1;
}

/* --- Section: Reviews --- */
#reviews {
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-soft) 100%);
}

.review-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.review-card {
  position: relative;
}

.review-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.avatar-placeholder {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--primary-soft);
  border: 1px solid var(--border);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 15px;
}

.user-name {
  font-weight: 600;
  font-size: 14.5px;
  color: #ffffff;
}

.user-tag {
  font-size: 11px;
  color: var(--primary);
}

.review-text {
  font-style: italic;
  font-size: 13.5px;
  line-height: 1.6;
}

/* --- Section: FAQ --- */
#faq {
  background: var(--bg);
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  border-radius: 12px;
  background: var(--card);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: var(--transition);
}

.faq-question {
  width: 100%;
  background: none;
  border: none;
  color: #ffffff;
  font-size: 15.5px;
  font-weight: 600;
  text-align: left;
  padding: 18px 24px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-question:hover {
  background: var(--primary-soft);
}

.faq-icon {
  font-size: 16px;
  color: var(--primary);
  transition: transform 0.3s ease;
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
  background: rgba(3, 20, 15, 0.25);
}

.faq-item.active .faq-answer {
  max-height: 1000px;
  transition: max-height 0.5s cubic-bezier(1, 0, 1, 0);
}

.faq-answer-inner {
  padding: 18px 24px;
  border-top: 1px solid rgba(167, 243, 208, 0.05);
  font-size: 14px;
  color: var(--muted);
  line-height: 1.6;
}

/* --- Bottom CTA Section --- */
.cta-section {
  padding: 86px 0;
  background: radial-gradient(circle at center, var(--card-strong) 0%, var(--bg) 100%);
  text-align: center;
  border-top: 1px solid var(--border);
}

.cta-container {
  max-width: 720px;
  margin: 0 auto;
}

.cta-title {
  font-size: 34px;
  margin-bottom: 16px;
}

.cta-desc {
  font-size: 15.5px;
  color: var(--muted);
  margin-bottom: 28px;
}

/* --- Footer --- */
footer {
  background: #020d0a;
  border-top: 1px solid var(--border);
  padding: 60px 0 28px 0;
  font-size: 13px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr repeat(4, 0.9fr);
  gap: 36px;
  margin-bottom: 40px;
}

.footer-brand h4 {
  font-size: 17px;
  margin-bottom: 14px;
  color: #ffffff;
}

.footer-brand p {
  color: var(--muted);
  line-height: 1.6;
  margin-bottom: 16px;
}

.footer-col h5 {
  font-size: 14.5px;
  margin-bottom: 16px;
  color: #ffffff;
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  margin-bottom: 8px;
}

.footer-col ul li a {
  color: var(--muted);
}

.footer-col ul li a:hover {
  color: var(--primary);
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  color: var(--muted);
}

.disclaimer {
  font-size: 12px;
  line-height: 1.6;
}

.footer-copyright {
  text-align: center;
  font-size: 11.5px;
  color: rgba(167, 243, 208, 0.35);
}

/* --- 404 Error Page Custom --- */
.error-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 40px 0;
}

.error-container {
  display: flex;
  justify-content: center;
  align-items: center;
}

.error-card {
  max-width: 500px;
  width: 100%;
  padding: 44px 32px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

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

.error-icon {
  font-size: 80px;
  font-family: var(--font-title);
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 14px;
  letter-spacing: -2px;
}

.error-title {
  font-size: 25px;
  margin-bottom: 12px;
}

.error-desc {
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 24px;
}

/* --- Scroll Reveal Animations --- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* --- Responsive Media Queries --- */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  
  .hero-content {
    text-align: center;
  }
  
  .hero-badge-container {
    justify-content: center;
  }
  
  .hero-actions {
    justify-content: center;
  }
  
  .footer-grid {
    grid-template-columns: 1.3fr repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  section {
    padding: 58px 0;
  }

  .hero-grid,
  .grid,
  .pricing-grid,
  .article-grid,
  .review-grid {
    grid-template-columns: 1fr;
  }

  .hero-title {
    font-size: 36px;
    line-height: 1.18;
  }
  
  .hero-data-card {
    padding: 16px;
  }
  
  .nav-toggle {
    display: block;
  }
  
  .nav-menu {
    display: none;
    position: absolute;
    top: 76px;
    left: 0;
    width: 100%;
    background: rgba(3, 20, 15, 0.98);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 24px;
    gap: 12px;
    z-index: 999;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
  }

  .nav-menu.active {
    display: flex;
  }
  
  .nav-item {
    width: 100%;
    text-align: center;
  }
  
  .nav-item a {
    display: block;
    width: 100%;
    padding: 12px;
  }
  
  .nav-item a.nav-cta {
    border-radius: 8px;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
}