/* RESET + BASE */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}
body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background: linear-gradient(135deg, #0f0f0f, #1a1a1a);
  color: #fff;
  transition: background 0.3s, color 0.3s;
  height: 100%;
}
main {
  flex: 1;
}
a {
  text-decoration: none;
  color: inherit;
}

/* NAVBAR CONTAINER */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 3rem;
  background-color: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

/* Divide space evenly between 3 parts */
.navbar-left,
.navbar-center,
.navbar-right {
  flex: 1;
  display: flex;
  align-items: center;
}

/* Logo on the left */
.navbar-left h1 {
  font-size: 1.8rem;
  background: linear-gradient(to right, #0ef6cc, #9c6fff);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Center nav links */
.navbar-center {
  justify-content: center;
}

.navbar-center ul {
  list-style: none;
  display: flex;
  gap: 2rem;
  padding: 0;
  margin: 0;
}

.navbar-center ul li a {
  text-decoration: none;
  color: #fff;
  transition: color 0.3s ease;
}

.navbar-center ul li a:hover {
  color: #0ef6cc;
}

/* Right theme toggle */
.navbar-right {
  justify-content: flex-end;
}

#themeToggle {
  background: none;
  border: none;
  font-size: 1.4rem;
  cursor: pointer;
  color: #fff;
  transition: transform 0.2s ease;
}

#themeToggle:hover {
  transform: scale(1.2);
}

@media (max-width: 768px) {
  .navbar {
    flex-direction: row;         /* ✅ KEEP ROW LAYOUT */
    align-items: center;
    padding: 0.8rem 1rem;        /* Slightly tighter padding */
  }

  .navbar-left h1 {
    font-size: 1.4rem;           /* Slightly smaller logo */
  }

  .navbar-center ul {
    gap: 1rem;                   /* Reduce spacing between nav links */
  }

  .navbar-center ul li a {
    font-size: 0.9rem;
  }

  #themeToggle {
    font-size: 1.2rem;
  }
}

/* Base nav list layout */
ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  justify-content: center;
  gap: 20px;
}

/* List items as inline blocks */
ul li {
  display: inline-block;
}

/* Anchor styles */
ul li a {
  position: relative;
  text-decoration: none;
  font-size: 16px;
  font-weight: 500;
  padding: 8px 12px;
  border-radius: 6px;
  transition: all 0.3s ease;
}

/* Light mode link color */
body.light-mode ul li a {
  color: #222;
}

/* Dark mode link color */
body.dark-mode ul li a {
  color: #eee;
}

/* Hover background and color (both themes) */
ul li a:hover {
  background-color: rgba(0, 0, 0, 0.05);
}

/* Hover underline animation */
ul li a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 100%;
  height: 2px;
  background-color: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

ul li a:hover::after {
  transform: scaleX(1);
}


/* HERO SECTION */
.hero {
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 4rem 2rem;
}
.hero-content h1 {
  font-size: 3rem;
  background: linear-gradient(to right, #0ef6cc, #9c6fff);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-content p {
  font-size: 1.2rem;
  margin-top: 1rem;
  color: #ccc;
}
body.light-mode .hero-content p {
  color: #000; /* black in light mode */
}

.cta {
  margin-top: 2rem;
  padding: 0.8rem 2rem;
  border-radius: 999px;
  border: none;
  background: #0ef6cc;
  color: #000;
  font-weight: bold;
  cursor: pointer;
  transition: background 0.3s;
}
.cta:hover {
  background: #0bdcb2;
}

/* Section Layout */
section {
  padding: 80px 20px;
  text-align: center;
}

/* Title Styling */
.section-title {
  font-size: 2.5rem;
  margin-bottom: 40px;
  color: inherit;
}


/* FEATURES */
.features {
  padding: 2rem 3rem;
}
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}
.card {
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(8px);
  border-radius: 16px;
  padding: 1.5rem;
  text-align: center;
  transition: transform 0.3s ease, background 0.3s;
}
.card:hover {
  transform: translateY(-5px);
  background-color: rgba(0, 255, 200, 0.1);
  box-shadow: 0 4px 20px rgba(0, 255, 200, 0.2);

}
/* Light Mode Card Style */
body.light-mode .card {
  background: rgba(0, 0, 0, 0.05); /* subtle dark glass effect */
  color: #000; /* black text */
}

body.light-mode .card:hover {
  background-color: rgba(0, 123, 255, 0.1); /* bluish glow */
  box-shadow: 0 4px 20px rgba(0, 123, 255, 0.2);
}

.card h3 {
  margin-top: 0.5rem;
  color: #0ef6cc;
}

/* CHAT DEMO */
.chat-section {
  padding: 2rem 3rem;
}
.chat-box {
  max-width: 600px;
  margin: auto;
  background: rgba(255, 255, 255, 0.05);
  padding: 1rem;
  border-radius: 16px;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.chat-message {
  padding: 0.8rem 1rem;
  border-radius: 16px;
  max-width: 80%;
  .chat-message {
  transition: all 0.3s ease;
}

}
.chat-message.ai {
  background-color: #2e2e2e;
  align-self: flex-start;
}
.chat-message.user {
  background-color: #0ef6cc;
  color: #000;
  align-self: flex-end;
}

/* FOOTER */
footer {
  text-align: center;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.03);
  font-size: 0.9rem;
}

/* ANIMATIONS */
.animate {
  opacity: 0;
  transform: translateY(40px);
  transition: all 0.8s ease-out;
}
.animate.visible {
  opacity: 1;
  transform: translateY(0);
}

/* RESPONSIVE */
@media (max-width: 768px) {
  .navbar {
    flex-direction: column;
    align-items: flex-start;
  }
  .feature-grid {
    grid-template-columns: 1fr;
  }
  .hero-content h1 {
    font-size: 2.2rem;
  }
}


/* NAV ACTIVE LINK */
.navbar ul li a.active {
  color: #0ef6cc;
  font-weight: bold;
}

/* LIGHT MODE PERSISTENCE */
body.light-mode {
  background: linear-gradient(to right, #ffffff, #f0f0f0);
  color: #111;
}
body.light-mode .chat-message.user {
  background-color: #0ef6cc;
  color: #000;
}
body.light-mode .chat-message.ai {
  background-color: #c1c1c1;
  color: #000;
}
/* CHAT FORM */
#chatForm {
  max-width: 600px;
  margin: 1rem auto;
  display: flex;
  gap: 1rem;
  padding: 0 1rem;
  box-sizing: border-box;

}
#chatForm input {
  flex: 1;
  padding: 0.7rem 1rem;
  border-radius: 999px;
  border: none;
  outline: none;
  font-size: 1rem;
}
#chatForm button {
  padding: 0.7rem 1.5rem;
  background-color: #0ef6cc;
  border: none;
  border-radius: 999px;
  font-weight: bold;
  cursor: pointer;
}
@media (max-width: 480px) {
  #chatForm {
    flex-direction: column;
  }

  #chatForm button {
    width: 100%;
  }
}

/* Optional loading style */
.loading {
  font-style: italic;
  color: #ccc;
}

@media (max-width: 480px) {
  /* Navbar layout stays row-wise */
@media (max-width: 480px) {
  .navbar {
    flex-direction: row;
    flex-wrap: nowrap; /* ✅ Prevent breaking into multiple rows */
    justify-content: space-between;
    align-items: center;
    padding: 0.6rem 1rem;
    gap: 0;
  }

  .navbar-left,
  .navbar-center,
  .navbar-right {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .navbar-left {
    justify-content: flex-start;  /* 🔹 Logo on left */
  }

  .navbar-center {
    justify-content: center;      /* 🔹 Nav in center */
  }

  .navbar-right {
    justify-content: flex-end;    /* 🔹 Toggle on right */
  }

  .navbar-center ul {
    display: flex;
    flex-direction: row;
    gap: 0.7rem;
    padding: 0;
    margin: 0;
    list-style: none;
  }

  .navbar-center ul li a {
    font-size: 0.85rem;
    white-space: nowrap; /* 🚫 Prevents breaking lines */
  }

  #themeToggle {
    font-size: 1.2rem;
    padding: 0.2rem;
    background: none;
    border: none;
  }
}

 @media (max-width: 480px) {
  .navbar {
    flex-direction: row;
    flex-wrap: nowrap;
    justify-content: space-between;
    align-items: center;
    padding: 0.6rem 1rem;
    gap: 0;
  }

  .navbar-left,
  .navbar-center,
  .navbar-right {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .navbar-left {
    justify-content: flex-start;
  }

  .navbar-center {
    justify-content: center;
  }

  .navbar-right {
    justify-content: flex-end;
  }

  .navbar-center ul {
    display: flex;
    flex-direction: row;
    gap: 0.7rem;
    padding: 0;
    margin: 0;
    list-style: none;
  }

  .navbar-center ul li a {
    font-size: 0.85rem;
    white-space: nowrap;
  }

  #themeToggle {
    font-size: 1.2rem;
    padding: 0.2rem;
    background: none;
    border: none;
  }

/* === LIGHT MODE STYLING === */
body.light-mode .navbar ul li a {
  color: #000; /* Set text color to black in light mode */
}

/* === DARK MODE STYLING (OPTIONAL) === */
body.dark-mode .navbar ul li a {
  color: #fff;
}

  /* --- Rest of your 480px styles --- */
  .hero {
    padding: 2.5rem 1rem;
    flex-direction: column;
  }

  .hero-content h1 {
    font-size: 2rem;
    line-height: 2.5rem;
  }

  .hero-content p {
    font-size: 1rem;
  }

  .cta {
    padding: 0.6rem 1.5rem;
    font-size: 0.95rem;
  }

  section {
    padding: 60px 16px;
  }

  .section-title {
    font-size: 2rem;
    margin-bottom: 30px;
  }

  .features {
    padding: 1rem;
  }

  .card {
    padding: 1.2rem;
  }

  .card h3 {
    font-size: 1.2rem;
  }

  .chat-section {
    padding: 1.5rem 1rem;
  }

  .chat-box {
    padding: 1rem;
    width: 100%;
  }

  .chat-message {
    font-size: 0.9rem;
    padding: 0.6rem 0.9rem;
    border-radius: 12px;
  }

  #chatForm {
    gap: 0.8rem;
  }

  #chatForm input,
  #chatForm button {
    font-size: 0.95rem;
    padding: 0.6rem 1rem;
  }

  footer {
    font-size: 0.8rem;
    padding: 0.8rem;
  }

  .animate {
    transition: all 0.5s ease-out;
  }
}
}