/* ==================== 1. RESET & BASE ==================== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  height: 100%;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  font-family: 'Poppins', sans-serif;
  display: flex;
  flex-direction: column;
  transition: background 0.4s ease, color 0.4s ease;
  flex: 1 0 auto;
}

body.light {
  background: #f0f2ff;
  color: #333;
}

body.dark {
  background: #121212;
  color: #e0e0e0;
}

/* ==================== 2. NAVBAR & BRANDING ==================== */
.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;
}

.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;
}

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

/* 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;
}

.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%;
}

/* ==================== 3. AUTH BUTTONS & TOGGLE ==================== */
.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;
}

/* ==================== 4. HAMBURGER & MOBILE 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 {
  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;
}

/* Ensure the grid doesn't feel crowded */
.about-layout {
  max-width: 1100px;
  margin: 0 auto;
  padding: 4rem 20px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: center;
  font-family: 'Trebuchet MS', 'Lucida Sans Unicode', 'Lucida Grande', 'Lucida Sans', Arial, sans-serif;
}

/* Make paragraphs easy to read */
.about-content p {
  font-size: 1.1rem;
  line-height: 1.8;
  margin-bottom: 1.5rem;
  color: inherit;
  opacity: 0.8;
}

/* Simplified Highlight for the Dark/Light transition */
.highlight {
  margin-top: 1.5rem;
  font-weight: 700;
  color: #1ee9c0;
  font-size: 0.9rem;
  text-transform: uppercase;
}

.about-glass {
  max-width: 700px;
  width: 100%;
  padding: 3rem;
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(20px);
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.1);
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.highlight {
  margin-top: 2rem;
  font-weight: 700;
  font-size: 1.2rem;
  color: #1ee9c0;
  letter-spacing: 1px;
  text-transform: uppercase;
}

/* ==================== 6. FOOTER ==================== */
footer {
  flex-shrink: 0;
  width: 100%;
  padding: 2rem 40px;
  display: flex;
  justify-content: center; 
  align-items: center;
  background: linear-gradient(135deg, #667eea, #10bbaa);
  color: white;
  font-size: 1.05rem;
}

/* ==================== 7. MEDIA QUERIES (RESPONSIVE) ==================== */

/* Standard Tablet / Desktop Adjustments */
@media (max-width: 992px) {
  h1 {
    font-size: 3.3rem;
  }
  
  .card-grid {
    gap: 2rem;
  }

  .about-layout {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 3rem;
  }

  .page-hero h1 {
    font-size: 3rem;
  }
}

/* Standard Mobile Adjustments */
@media (max-width: 768px) {
  h1 {
    font-size: 2.9rem;
  }

  .hamburger {
    display: flex;
  }

  .nav-links,
  .auth-buttons {
    display: none;
  }

  #Colleges h1 {
    font-size: 3rem;
  }

  .flip-card {
    height: 350px;
  }
}

/* Small Mobile Adjustments */
@media (max-width: 480px) {
  h1 {
    font-size: 2.5rem;
  }

  .logo {
    font-size: 2rem;
  }

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

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

  #Colleges h1 {
    font-size: 2.5rem;
  }

  .flip-card {
    height: 320px;
  }

  .page-hero h1 {
    font-size: 2.5rem;
  }

  .about-glass,
  .about-glass-card {
    padding: 2rem 1.5rem;
  }
}