/* CSS Variables */
:root {
  --primary-blue: #3498db;
  --dark-blue: #2980b9;
  --navy: #1e3a5f;
  --dark-navy: #1a2e4a;
  --footer-bg: #1e2d3d;
  --orange: #e67e22;
  --light-orange: #f39c12;
  --text-dark: #2c3e50;
  --text-gray: #6b7280;
  --text-light: #9ca3af;
  --white: #ffffff;
  --light-gray: #f8fafc;
  --border-gray: #e5e7eb;
  --gradient-start: #b8a898;
  --gradient-end: #8fa5b5;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family:
    'Poppins',
    -apple-system,
    BlinkMacSystemFont,
    'Segoe UI',
    Roboto,
    sans-serif;
  color: var(--text-dark);
  line-height: 1.6;
  background-color: var(--white);
}

a {
  text-decoration: none;
  color: inherit;
}

ul {
  list-style: none;
}

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Navigation */
.navbar {
  background: var(--white);
  padding: 15px 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
}

.logo-img {
  height: 36px;
  width: auto;
  display: block;
  object-fit: contain;
}

.logo-img-footer {
  height: 32px;
  filter: brightness(0) invert(1);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 40px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 30px;
}

.nav-links a {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-dark);
  letter-spacing: 0.5px;
  transition: color 0.3s;
}

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

.dropdown-arrow {
  font-size: 0.7rem;
  margin-left: 2px;
  transform: rotate(90deg);
  display: inline-block;
}

.nav-buttons {
  display: flex;
  align-items: center;
  gap: 15px;
}

.btn-login {
  color: var(--primary-blue);
  font-weight: 600;
  font-size: 0.9rem;
}

.btn-start {
  background: var(--navy);
  color: var(--white);
  padding: 10px 20px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.85rem;
  transition: background 0.3s;
}

.btn-start:hover {
  background: var(--dark-navy);
}

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

.mobile-menu-btn span {
  display: block;
  width: 25px;
  height: 3px;
  background: var(--navy);
  border-radius: 2px;
  transition: all 0.3s;
}

/* Hero Section */
.hero {
  padding: 60px 0 80px;
  background: var(--white);
  position: relative;
  overflow: hidden;
}

.hero-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-content h1 {
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1.3;
  color: var(--navy);
  margin-bottom: 20px;
}

.hero-content h1 .highlight {
  color: var(--orange);
}

.hero-subtitle {
  font-size: 1rem;
  color: var(--text-gray);
  margin-bottom: 30px;
  line-height: 1.7;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--primary-blue);
  color: var(--white);
  padding: 14px 28px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.9rem;
  letter-spacing: 0.5px;
  transition: all 0.3s;
  box-shadow: 0 4px 15px rgba(52, 152, 219, 0.3);
}

.btn-primary:hover {
  background: var(--dark-blue);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(52, 152, 219, 0.4);
}

.btn-primary .arrow {
  font-size: 1.2rem;
}

.social-proof {
  display: flex;
  align-items: center;
  gap: 15px;
  margin-top: 40px;
}

.avatars {
  display: flex;
}

.avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 3px solid var(--white);
  margin-left: -12px;
  object-fit: cover;
}

.avatar:first-child {
  margin-left: 0;
}

.proof-text {
  display: flex;
  flex-direction: column;
}

.mentees-count {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-dark);
}

.mentees-desc {
  font-size: 0.7rem;
  color: var(--text-light);
  letter-spacing: 0.5px;
}

/* Hero Image */
.hero-image {
  position: relative;
  display: flex;
  justify-content: center;
}

.image-container {
  position: relative;
  z-index: 1;
  width: 380px;
  height: 450px;
}

.main-image {
  position: relative;
  z-index: 2;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 20px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
}

.decorative-dots {
  position: absolute;
  z-index: 0;
  bottom: -20px;
  left: -40px;
  width: 80px;
  height: 80px;
  background-image: radial-gradient(
    circle,
    var(--primary-blue) 2px,
    transparent 2px
  );
  background-size: 12px 12px;
  opacity: 0.5;
}

.decorative-circle {
  position: absolute;
  z-index: 0;
  top: -50px;
  right: -50px;
  width: 100px;
  height: 100px;
  border: 2px solid rgba(230, 126, 34, 0.2);
  border-radius: 50%;
}

/* Difference Section */
.difference {
  padding: 80px 0;
  background: var(--light-gray);
  text-align: center;
}

.section-tag {
  display: inline-block;
  color: var(--primary-blue);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 2px;
  margin-bottom: 15px;
}

.difference h2 {
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 15px;
  line-height: 1.3;
}

.difference h2 .highlight {
  color: var(--primary-blue);
}

.section-desc {
  color: var(--text-gray);
  font-size: 0.95rem;
  margin-bottom: 50px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  max-width: 1000px;
  margin: 0 auto;
}

.feature-card {
  background: var(--white);
  padding: 35px 25px;
  border-radius: 12px;
  text-align: left;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
  transition:
    transform 0.3s,
    box-shadow 0.3s;
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.feature-icon {
  width: 50px;
  height: 50px;
  background: rgba(52, 152, 219, 0.1);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.feature-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 12px;
}

.feature-card p {
  font-size: 0.9rem;
  color: var(--text-gray);
  line-height: 1.7;
}

/* Sandbox Section */
.sandbox {
  padding: 60px 0 80px;
  background: var(--light-gray);
}

.sandbox-card {
  max-width: 650px;
  margin: 0 auto;
  background: var(--white);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

.sandbox-header {
  background: var(--primary-blue);
  padding: 15px 25px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.sandbox-title {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--white);
  font-weight: 600;
  font-size: 0.85rem;
  letter-spacing: 1px;
}

.powered-by {
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.7rem;
  letter-spacing: 0.5px;
}

.sandbox-content {
  padding: 50px 40px;
  text-align: center;
}

.sandbox-content h3 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 25px;
}

/* CTA Section */
.cta {
  padding: 80px 0;
  background: linear-gradient(
    135deg,
    var(--gradient-start) 0%,
    var(--gradient-end) 100%
  );
  text-align: center;
}

.cta h2 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 20px;
}

.cta p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.95rem;
  margin-bottom: 30px;
  line-height: 1.8;
}

.btn-white {
  display: inline-block;
  background: var(--white);
  color: var(--navy);
  padding: 15px 35px;
  border-radius: 30px;
  font-weight: 600;
  font-size: 0.9rem;
  letter-spacing: 0.5px;
  transition: all 0.3s;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.btn-white:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

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

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand .logo {
  display: inline-block;
  margin-bottom: 15px;
  font-size: 1.3rem;
}

.footer-brand .logo-img-footer {
  filter: none;
}

.footer-brand p {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.7;
  margin-bottom: 20px;
  max-width: 250px;
}

.social-links {
  display: flex;
  gap: 10px;
}

.social-icon {
  width: 38px;
  height: 38px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  transition:
    background 0.3s,
    color 0.3s;
}

.social-icon svg {
  flex-shrink: 0;
}

.social-icon:hover {
  background: var(--primary-blue);
  color: var(--white);
}

.footer-links h4,
.footer-contact h4 {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 1px;
  color: var(--orange);
  margin-bottom: 20px;
}

.footer-links ul li,
.footer-contact ul li {
  margin-bottom: 12px;
}

.footer-links a {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.8);
  transition: color 0.3s;
}

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

.footer-contact ul li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.8);
}

.footer-contact svg {
  flex-shrink: 0;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 25px;
  text-align: center;
}

.footer-bottom p {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.5);
}

/* Responsive Design */
@media (max-width: 1024px) {
  .hero-container {
    gap: 40px;
  }

  .hero-content h1 {
    font-size: 2rem;
  }

  .image-container {
    width: 320px;
    height: 400px;
  }

  .features-grid {
    gap: 20px;
  }

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--white);
    flex-direction: column;
    padding: 30px;
    gap: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transform: translateY(-150%);
    transition: transform 0.3s;
  }

  .nav-menu.active {
    transform: translateY(0);
  }

  .nav-links {
    flex-direction: column;
    gap: 20px;
  }

  .nav-buttons {
    flex-direction: column;
    width: 100%;
  }

  .btn-start {
    text-align: center;
    width: 100%;
  }

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

  .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(7px, -6px);
  }

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

  .hero-content h1 {
    font-size: 1.8rem;
  }

  .hero-subtitle br {
    display: none;
  }

  .btn-primary {
    margin: 0 auto;
  }

  .social-proof {
    justify-content: center;
  }

  .hero-image {
    order: -1;
  }

  .image-container {
    width: 280px;
    height: 350px;
  }

  .decorative-circle {
    display: none;
  }

  .difference h2 {
    font-size: 1.6rem;
  }

  .section-desc br {
    display: none;
  }

  .features-grid {
    grid-template-columns: 1fr;
    max-width: 400px;
  }

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

  .feature-icon {
    margin: 0 auto 20px;
  }

  .sandbox-header {
    flex-direction: column;
    gap: 10px;
    text-align: center;
  }

  .sandbox-content {
    padding: 40px 25px;
  }

  .sandbox-content h3 {
    font-size: 1.2rem;
  }

  .cta h2 {
    font-size: 1.5rem;
  }

  .cta p br {
    display: none;
  }

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

  .footer-brand p {
    max-width: 100%;
  }

  .social-links {
    justify-content: center;
  }

  .footer-contact ul li {
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .hero {
    padding: 40px 0 60px;
  }

  .hero-content h1 {
    font-size: 1.5rem;
  }

  .image-container {
    width: 250px;
    height: 300px;
  }

  .btn-primary {
    padding: 12px 24px;
    font-size: 0.85rem;
  }

  .difference {
    padding: 60px 0;
  }

  .sandbox {
    padding: 40px 0 60px;
  }

  .cta {
    padding: 60px 0;
  }

  .footer {
    padding: 40px 0 20px;
  }
}