/* ==========================================================================
   Global Variables & Reset
   ========================================================================== */
:root {
  --brand-blue: #2980b9;
  --brand-deep: #189ab4;
  --dark-blue: #2c3e50;
  --text-dark: #222;
  --text-muted: #666;
  --muted: #666;
  --bg-light: #fff;
  --panel: #f5f5f5;
  --shadow-light: rgba(0, 0, 0, 0.1);
  --shadow-hover: rgba(0, 0, 0, 0.15);
  --font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  --bg: var(--bg-light);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  color: var(--text-dark);
  background-color: #f9f9f9;
  margin: 0;
  line-height: 1.5;
  scroll-behavior: smooth;
}

/* ==========================================================================
   Navbar Styles
   ========================================================================== */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.8rem 1rem;
  background-color: var(--bg-light);
  box-shadow: 0 2px 5px var(--shadow-light);
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
  height: 48px;
}

.navbar .logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-grow: 1;
  justify-content: center;
}

.navbar .logo img {
  height: 32px;
  display: block;
}

.navbar .nav-links {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.navbar .nav-links ul {
  list-style: none;
  display: flex;
  gap: 1.2rem;
  margin: 0;
  padding: 0;
}

.navbar a {
  color: var(--dark-blue);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  transition: color 0.3s ease, transform 0.2s ease;
}

.navbar a:hover,
.navbar a:focus-visible {
  color: var(--brand-blue);
  text-decoration: underline;
  transform: translateY(-2px);
}

.navbar a.active {
  color: var(--brand-deep);
  font-weight: 700;
}

/* Bot Container */
.bot-container {
  display: flex;
  align-items: center;
  gap: 8px;
}

.bot-image {
  width: 28px;
  height: auto;
  display: block;
  animation: float 3s ease-in-out infinite;
}

.cloud-text {
  font-size: 0.7rem;
  color: #222;
  font-weight: 600;
  text-shadow: 0 0 2px rgba(42, 139, 255, 0.2);
  line-height: 1.2;
}

/* Hamburger Button */
.hamburger {
  display: none;
  background: none;
  color: #000;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.5rem;
  transition: transform 0.2s ease;
  order: -1;
}

.hamburger:hover,
.hamburger:focus {
  transform: scale(1.1);
  outline: none;
}

/* Mobile Menu */
.mobile-menu {
  display: block;
  position: fixed;
  top: 48px;
  left: 0;
  width: 100%;
  background-color: var(--bg-light);
  overflow: hidden;
  height: 0;                         /* collapsed */
  transition: height 0.3s ease;      /* animate open/close */
  box-shadow: 0 2px 5px var(--shadow-light);
  z-index: 1001;
}

.mobile-menu.active {
  /* no fixed height here — JS will set it */
}

.mobile-menu ul {
  list-style: none;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.mobile-menu li a {
  font-size: 1rem;
  color: var(--dark-blue);
  text-decoration: none;
  padding: 0.rem;
  display: block;
}

.mobile-menu li a:hover,
.mobile-menu li a:focus {
  color: var(--brand-blue);
  background-color: #f7fafd;
  border-radius: 4px;
}

/* Social Icons */
.navbar-social {
  display: flex;
  gap: 12px;
  align-items: center;
}

.navbar-social img {
  height: 18px;
  width: auto;
  transition: filter 0.3s ease;
}

.navbar-social a:hover img,
.navbar-social a:focus img {
  filter: brightness(1.2);
}

.mobile-menu .navbar-social {
  padding: 0.5rem 1.5rem;
  justify-content: left;
}

/* Animations */
@keyframes float {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-5px);
  }
}

/* ==========================================================================
   Vision Section Styles
   ========================================================================== */
.vision-section {
  background: linear-gradient(135deg, #f5f7fa 0%, #e4e7eb 100%);
  padding: 80px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
  scroll-margin-top: 48px;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
}

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

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  color: #1a1a1a;
  margin-bottom: 30px;
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: "";
  width: 60px;
  height: 4px;
  background: #007bff;
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
}

.vision-text {
  font-size: 1.2rem;
  color: #555;
  margin-bottom: 20px;
  line-height: 1.8;
}

.highlight {
  color: #007bff;
  font-weight: 600;
  transition: color 0.3s ease;
}

.highlight:hover {
  color: #0056b3;
}

.vision-icon {
  margin-top: 40px;
}

.icon-image {
  max-width: 150px;
  height: auto;
  opacity: 0.9;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.icon-image:hover {
  transform: scale(1.1);
  opacity: 1;
}

/* ==========================================================================
   Footer Styles
   ========================================================================== */
.footer {
  background-color: var(--bg-light);
  padding: 1.5rem 1rem;
  text-align: center;
  font-size: 0.9rem;
  color: var(--text-dark);
  border-top: 1px solid #ddd;
  font-family: var(--font-family);
}

.footer-container {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.footer a {
  color: var(--brand-blue);
  text-decoration: none;
  font-weight: 600;
  transition: color 0.3s ease;
}

.footer a:hover,
.footer a:focus {
  color: #1a6edd;
  text-decoration: underline;
  outline: none;
}

/* ==========================================================================
   Responsive Styles
   ========================================================================== */
@media (max-width: 768px) {
  .navbar {
    padding: 0.6rem 1rem;
    height: 46px;
    justify-content: space-between;
  }

  .navbar .nav-links {
    display: none;
  }

  .hamburger {
    display: block;
  }

  .navbar .logo img {
    height: 28px;
  }

  .bot-container {
    gap: 6px;
  }

  .bot-image {
    width: 24px;
  }

  .cloud-text {
    font-size: 0.65rem;
  }

  .vision-section {
    padding: 60px 0;
  }

  .section-title {
    font-size: 2rem;
  }

  .vision-text {
    font-size: 1rem;
  }

  .icon-image {
    max-width: 120px;
  }
}

@media (max-width: 480px) {
  .navbar {
    padding: 0.5rem 0.8rem;
    height: 44px;
  }

  .navbar .logo img {
    height: 24px;
  }

  .bot-image {
    width: 20px;
  }

  .cloud-text {
    font-size: 0.6rem;
  }

  .mobile-menu.active {
    height: 240px;
  }

  .vision-section {
    padding: 40px 0;
  }

  .section-title {
    font-size: 1.7rem;
  }

  .vision-text {
    font-size: 0.9rem;
  }

  .icon-image {
    max-width: 100px;
  }
}

@media (min-width: 769px) {
  .navbar .logo {
    justify-content: flex-start;
  }
}