/* ==================== 1. Reset & Base ==================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  height: 100%;
  font-family: 'Poppins', sans-serif;
  display: flex;
  flex-direction: column;
}

/* Body & Background */
body {
  background-image: url(UBT7784-e1564990441516.jpg);
  background-size: cover;
  background-repeat: no-repeat;
  background-position: center;
  background-attachment: scroll;
  overflow-x: hidden;
  backdrop-filter: blur(5px);
}

/* ==================== 2. Navbar ==================== */
.nav-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 80px;
  display: flex;
  align-items: center;
  padding: 0 40px;
  z-index: 1000;
  transition: all 0.3s ease;
}

body.light .nav-container {
  background: #fff;
  box-shadow: 0 2px 10px rgba(0,0,0,0.08);
  border-bottom: 1px solid #eaeaea;
}

body.dark .nav-container {
  background: #222;
  box-shadow: 0 2px 10px rgba(0,0,0,0.3);
  border-bottom: 1px solid #333;
}

/* Logo / Brand */
.brand {
  font-size: 24px;
  font-weight: 800;
  background: linear-gradient(135deg, #2652c0, #1ee9c0);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-right: 40px;
}

/* Navigation Links */
.nav-links {
  display: flex;
  align-items: center;
  gap: 40px;
  margin-right: auto;
  margin-left: 30px;
}

.nav-links a {
  text-decoration: none;
  font-size: 18px;
  font-weight: 500;
  color: #4a5568;
  padding: 8px 0;
  position: relative;
  transition: color 0.3s ease;
  white-space: nowrap;
}

body.dark .nav-links a { color: #cbd5e0; }

.nav-links a:hover { color: #2652c0; }
body.dark .nav-links a:hover { color: #a3bffa; }

/* Underline Hover Effect */
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 3px;
  background: linear-gradient(135deg, #2652c0, #1ee9c0);
  border-radius: 2px;
  transition: width 0.3s ease;
}

.nav-links a:hover::after { width: 100%; }

/* Auth Buttons */
.auth-buttons {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-left: auto;
}

.auth-buttons button {
  padding: 10px 24px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 16px;
  cursor: pointer;
  transition: all 0.3s ease;
  border: none;
  white-space: nowrap;
}

#login-btn {
  background: transparent;
  color: #2652c0;
  border: 2px solid #2652c0;
}

body.dark #login-btn {
  color: #a3bffa;
  border-color: #a3bffa;
}

#login-btn:hover {
  background: rgba(38, 82, 192, 0.1);
  transform: translateY(-2px);
}

#register-btn {
  background: linear-gradient(to right, #2652c0, #1ee9c0);
  color: white;
  box-shadow: 0 4px 12px rgba(38, 82, 192, 0.3);
}

#register-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(38, 82, 192, 0.4);
}

/* Theme Toggle Switch */
.switch {
  font-size: 17px;
  position: relative;
  display: inline-block;
  width: 3.5em;
  height: 2em;
  margin-left: 15px;
}

.switch input { opacity: 0; width: 0; height: 0; }

.slider {
  --background: #28096b;
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--background);
  transition: 0.5s;
  border-radius: 30px;
}

.slider:before {
  position: absolute;
  content: "";
  height: 1.4em;
  width: 1.4em;
  border-radius: 50%;
  left: 10%;
  bottom: 15%;
  box-shadow: inset 8px -4px 0px 0px #fff000;
  background: var(--background);
  transition: 0.5s;
}

input:checked + .slider {
  background-color: #522ba7;
}

input:checked + .slider:before {
  transform: translateX(100%);
  box-shadow: inset 15px -4px 0px 15px #fff000;
}

/* Hamburger Menu */
.hamburger {
  display: none;
  width: 35px;
  height: 30px;

  flex-direction: column;
  justify-content: space-between;

  background: none;
  border: none;
  cursor: pointer;

  margin-left: auto; 

  z-index: 1001;
}

.hamburger span {
  display: flex;
  height: 4px;
  width: 100%;
  justify-content: space-between;
  background-color: #2652c0;
  border-radius: 2px;
  transition: all 0.3s ease;
}

.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(8px,8px); }
.hamburger.active span:nth-child(2) { opacity: 0; transform: translateX(20px); }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(7px,-7px); }

/* Mobile Menu */
.mobile-menu {
  position: fixed;
  top: 0;
  right: -100%;
  width: 300px;
  height: 100vh;
  background: #fff;
  box-shadow: -5px 0 15px rgba(0,0,0,0.1);
  z-index: 999;
  transition: right 0.4s ease;
  padding: 100px 30px;
  display: flex;
  flex-direction: column;
  gap: 30px;
}

body.dark .mobile-menu {
  background: #222;
  box-shadow: -5px 0 15px rgba(0,0,0,0.3);
}

.mobile-menu.active { right: 0; }

.mobile-menu-links {
  display: flex;
  flex-direction: column;
  gap: 25px;
}

.mobile-menu-links a {
  font-size: 20px;
  font-weight: 500;
  color: #4a5568;
  text-decoration: none;
  padding: 12px 0;
  border-bottom: 1px solid #eaeaea;
  transition: color 0.3s ease;
}

body.dark .mobile-menu-links a {
  color: #cbd5e0;
  border-bottom-color: #333;
}

.mobile-menu-links a:hover { color: #2652c0; }

.mobile-auth-buttons {
  display: flex;
  flex-direction: column;
  gap: 15px;
  margin-top: 20px;
}

.mobile-auth-buttons button {
  padding: 14px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 17px;
  cursor: pointer;
  transition: all 0.3s ease;
  border: none;
}

#mobile-login-btn {
  background: transparent;
  color: #2652c0;
  border: 2px solid #2652c0;
}

#mobile-register-btn {
  background: linear-gradient(135deg, #2652c0, #1ee9c0);
  color: white;
}

.logo{
  max-height: 60px;
  width: auto;       
  display: block;
  margin-right: 30px;    
}

/* ==================== COLLEGES PAGE ==================== */
.college-card {
    transition: transform 10s ease-in-out; /* smooth rotation */
    transform-style:flat;
  }

  .college-card:hover {
    transform: rotateY(180deg);
  }


/* Main container below navbar */
.colleges-container {
  margin-top: 100px; /* leave space for fixed navbar */
  padding: 40px 80px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
}

/* College card */
.college-card {
  background: rgba(255, 255, 255, 0.9);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  display: flex;
  flex-direction: column;
}

/* Dark mode support */
body.dark .college-card {
  background: rgba(34, 34, 34, 0.9);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.5);
}

/* College image */
.college-card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

/* College info */
.college-card .college-info {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.college-card .college-info h3 {
  font-size: 20px;
  font-weight: 700;
  color: #2652c0;
}

body.dark .college-card .college-info h3 {
  color: #a3bffa;
}

.college-card .college-info p {
  font-size: 16px;
  color: #4a5568;
}

body.dark .college-card .college-info p {
  color: #cbd5e0;
}

/* Button inside card */
.college-card .college-info a {
  margin-top: 10px;
  align-self: start;
  text-decoration: none;
  font-weight: 600;
  padding: 8px 16px;
  border-radius: 6px;
  background: linear-gradient(135deg, #2652c0, #1ee9c0);
  color: #fff;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.college-card .college-info a:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(38, 82, 192, 0.4);
}

/* ==================== 6. Footer ==================== */
footer {
  flex-shrink: 0;
  width: 100%;
  padding: 3.5rem 1rem;
  text-align: center;
  background: linear-gradient(135deg, #2652c0, #1ee9c0);
  color: white;
  font-size: 1.05rem;
  font-weight: 500;
  letter-spacing: 0.5px;

}

/* ==================== RESPONSIVE ==================== */

@media (max-width: 1024px) {
  .colleges-container { padding: 30px; gap: 25px; }
}

@media (max-width: 768px) {
  .colleges-container { padding: 20px; gap: 20px; }
}

@media (max-width: 480px) {

  /* Navbar layout */
  .nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 20px;
    flex-wrap: nowrap;
  }

  /* Show hamburger */
  .hamburger {
    display: flex;
    order: 2;
    margin-left: auto;
  }

  /* Hide desktop elements */
  .nav-links,
  .auth-buttons {
    display: none;
  }

  /* Keep navbar clean */
  .nav-container {
    align-items: center;
  }
  /* Typography & spacing */
  h1 {
    font-size: 2.5rem;
  }

  .form-container {
    padding: 2.5rem 1.8rem;
  }

  .submit-btn {
    font-size: 1.15rem;
    padding: 1.2rem;
  }
}

@media (max-width: 1024px) {
  .nav-container { padding: 0 30px; }
  .nav-links { gap: 30px; }
  .nav-links a { font-size: 17px; }
  .auth-buttons button { padding: 8px 20px; font-size: 15px; }
}

@media (max-width: 768px) {
  .nav-container { padding: 0 20px; height: 70px; }
  .nav-links, .auth-buttons { display: none; }
  .hamburger { display: flex; }
  .brand { margin-right: auto; font-size: 22px; }
}

@media (max-width: 480px) {
  .nav-container { padding: 0 15px; }
  .mobile-menu { width: 250px; padding: 80px 20px; }
  .mobile-menu-links a { font-size: 18px; }
  .mobile-auth-buttons button { padding: 12px; font-size: 16px; }
}