/* ============================================= */
/* NAVBAR & NAVIGATION STYLES */
/* ============================================= */

/* --- Base Variables for Nav --- */
:root {
  --navbar-height: 80px;
  --dark-blue: #1a237e;
  --primary-purple: #8b5cf6;
  --white: #ffffff;
  --text-light: #cfcfcf;
  --text-dark: #333333;
}

/* --- Main Container --- */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: var(--navbar-height);
  
  /* FIX: Absolute positioning makes it overlap the hero section */
  position: absolute; 
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 0 5%;
  transition: all 0.3s ease-in-out;
  
  /* Force Transparency at Top */
  background: transparent !important;
  background-color: transparent !important;
  backdrop-filter: none !important;
  box-shadow: none !important;
  border: none !important;
}

/* --- Scrolled State (The Floating Pill) --- */
.navbar.scrolled {
  position: fixed;
  top: 20px;
  left: 5%;
  width: 90%;
  height: 70px;
  padding: 0 40px;
  background-color: transparent !important;
  backdrop-filter: none;
  box-shadow: none;
  border-radius: 0;
}

/* The Glass Effect Background (Pseudo-element) */
.navbar.scrolled::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50px;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 10px 30px rgba(0,0,0,0.1);
  z-index: -1;
}

/* --- Logo --- */
.logo img {
  width: 150px;
  height: auto;
}

/* --- Desktop Links --- */
.nav-links {
  list-style: none;
  display: flex;
  gap: 35px;
}

.nav-links a {
  color: var(--text-light);
  text-decoration: none;
  font-weight: 600;
  opacity: 0.9;
  transition: opacity 0.3s ease, color 0.3s ease;
}

.nav-links a:hover {
  color: var(--white);
  opacity: 1;
}

/* Scrolled Text Colors */
.navbar.scrolled .nav-links a {
  color: var(--text-dark);
}

.navbar.scrolled .nav-links a:hover {
  color: var(--primary-purple);
}

/* --- Dropdown (DESKTOP DEFAULT) --- */
.nav-links .dropdown { position: relative; }
.nav-links .dropdown-toggle { display: flex; align-items: center; gap: 8px; cursor: pointer; }
.nav-links .dropdown-toggle .fas { transition: transform 0.2s; }
.nav-links .dropdown.open .dropdown-toggle .fas { transform: rotate(180deg); }

/* Default Desktop Dropdown Box */
.dropdown-menu { 
  list-style: none; 
  position: absolute; 
  top: 100%; 
  left: 50%; 
  transform: translateX(-50%); 
  background-color: var(--white); 
  border-radius: 8px; 
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1); 
  padding: 10px 0; 
  min-width: 180px; 
  display: none; 
  z-index: 999; 
  margin-top: 10px; 
}

/* Transparent Glassy Dropdown at Top (Desktop Only) */
.navbar:not(.scrolled) .dropdown-menu {
  background-color: rgba(15, 23, 42, 0.9);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.navbar:not(.scrolled) .dropdown-menu a { color: var(--text-light); }
.navbar:not(.scrolled) .dropdown-menu a:hover { color: var(--white); background-color: rgba(255, 255, 255, 0.05); }

.nav-links .dropdown.open .dropdown-menu { display: block; }
.dropdown-menu a { color: var(--text-dark); display: block; padding: 12px 20px; text-align: left; }
.dropdown-menu a:hover { background-color: #f7f7fa; color: var(--primary-purple); }

/* --- Nav Actions (Buttons) --- */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 20px;
}

.nav-actions a {
  text-decoration: none;
  padding: 10px 20px;
  border-radius: 6px;
  font-weight: 600;
  transition: all 0.3s ease;
}

.login-btn { color: var(--white); font-weight: normal; padding: 10px 0; }
.navbar.scrolled .login-btn { color: #1e293b; }

.signup-btn {
  background-color: transparent;
  border: 1px solid var(--white);
  color: var(--white);
}
.signup-btn:hover { background-color: rgba(255, 255, 255, 0.1); border-color: var(--white); }

.navbar.scrolled .signup-btn { background-color: var(--primary-purple); border-color: var(--primary-purple); color: white; }
.navbar.scrolled .signup-btn:hover { background-color: #7c3aed; }

/* --- Mobile Toggle & Overlay --- */
.nav-toggle { display: none; }
.nav-toggle-label { display: none; cursor: pointer; font-size: 24px; color: var(--white); padding: 10px; z-index: 1100; }
.mobile-overlay { display: none; } 

/* ============================================= */
/* MOBILE RESPONSIVE LOGIC */
/* ============================================= */
@media (max-width: 768px) {
  .nav-toggle-label { display: block; }
  .navbar.scrolled .nav-toggle-label { color: var(--text-dark); }
  
  /* --- FIX: ROBUST MOBILE DROPDOWN --- */
  /* Replaced animation with stable display toggling */
  .navbar .nav-links .dropdown-menu,
  .navbar.scrolled .nav-links .dropdown-menu {
    position: static !important;
    float: none !important;
    background: transparent !important;
    background-color: transparent !important;
    box-shadow: none !important;
    border: none !important;
    width: 100% !important;
    max-width: 100% !important;
    transform: none !important;
    margin: 0 !important;
    padding: 0 !important;
    
    /* Flex for perfect centering */
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
  }
  
  /* Show when open */
  .navbar .nav-links .dropdown.open .dropdown-menu,
  .navbar.scrolled .nav-links .dropdown.open .dropdown-menu {
    display: flex !important;
  }

  /* Link Styling in Mobile Dropdown */
  .navbar .nav-links .dropdown-menu a,
  .navbar.scrolled .nav-links .dropdown-menu a {
    color: #94a3b8 !important; /* Muted text */
    padding: 15px 0 !important;
    font-size: 1rem !important;
    background: transparent !important;
    text-align: center !important;
    width: 100% !important;
    display: block !important;
  }
  
  .navbar .nav-links .dropdown-menu a:hover,
  .navbar.scrolled .nav-links .dropdown-menu a:hover {
    color: #ffffff !important;
    background: transparent !important;
  }

  /* ----------------------------------------------------- */
  /* STATE 1: TOP OF PAGE (Transparent Header) */
  /* ----------------------------------------------------- */
  .navbar:not(.scrolled) .nav-links {
    position: fixed;
    top: 80px;
    left: 0;
    width: 100%;
    height: calc(100vh - 80px);
    background-color: var(--dark-blue);
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    padding-top: 30px;
    overflow-y: auto;
    display: none;
    z-index: 1050;
  }

  .navbar:not(.scrolled) #nav-toggle:checked ~ .nav-links { display: flex; }
  .navbar:not(.scrolled) .nav-links a { color: #ffffff !important; font-size: 1.1rem; padding: 15px 0; display: block; }
  
  .navbar:not(.scrolled) .nav-actions { display: none; }
  .navbar:not(.scrolled) #nav-toggle:checked ~ .nav-actions {
    display: flex;
    flex-direction: column;
    position: fixed;
    bottom: 0; left: 0; right: 0;
    width: 100%;
    background-color: var(--dark-blue);
    padding: 20px;
    z-index: 1060;
  }
  .navbar:not(.scrolled) .nav-actions a { width: 100%; text-align: center; color: white; }

  /* ----------------------------------------------------- */
  /* STATE 2: SCROLLED (Bottom Sheet Slide Up) */
  /* ----------------------------------------------------- */
  .navbar.scrolled #nav-toggle:checked ~ .mobile-overlay {
    display: block;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.5);
    backdrop-filter: blur(4px);
    z-index: 1040;
  }

  .navbar.scrolled .nav-links {
    display: flex !important;
    visibility: hidden;
    flex-direction: column;
    position: fixed !important;
    bottom: 0 !important;
    left: 0 !important;
    right: 0 !important;
    top: auto !important;
    width: 100% !important;
    max-height: 80vh; 
    background-color: var(--dark-blue);
    border-radius: 24px 24px 0 0;
    /* Extra padding at bottom ensures user can scroll to see everything */
    padding: 40px 20px 150px 20px;
    box-shadow: 0 -10px 40px rgba(0,0,0,0.3);
    z-index: 1050;
    
    /* Scroll Logic: Critical for scrolling dropdown content */
    overflow-y: auto;
    overscroll-behavior: contain;
    scrollbar-width: none; 
    -ms-overflow-style: none;
    
    transform: translateY(120%) !important;
    opacity: 0;
    pointer-events: none;
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s ease, visibility 0s linear 0.4s;
  }
  
  .navbar.scrolled .nav-links::-webkit-scrollbar { display: none; }

  .navbar.scrolled #nav-toggle:checked ~ .nav-links {
    transform: translateY(0) !important;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s ease, visibility 0s linear 0s;
  }

  .navbar.scrolled .nav-links::before {
    content: '';
    position: absolute;
    top: 12px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 4px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 2px;
  }

  .navbar.scrolled .nav-links li { width: 100%; text-align: center; }
  .navbar.scrolled .nav-links a { display: block; padding: 15px 0; color: #ffffff !important; font-size: 1.1rem; }

  /* Actions */
  .navbar.scrolled .nav-actions {
    display: flex !important;
    flex-direction: column;
    position: fixed !important;
    bottom: 0 !important;
    left: 0 !important;
    right: 0 !important;
    padding: 20px;
    background-color: var(--dark-blue);
    z-index: 1060;
    gap: 10px;
    width: 100% !important;
    border-top: 1px solid rgba(255,255,255,0.1);
    
    transform: translateY(120%) !important;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s ease, visibility 0s linear 0.4s;
  }

  .navbar.scrolled #nav-toggle:checked ~ .nav-actions {
    transform: translateY(0) !important;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s ease, visibility 0s linear 0s;
  }

  .navbar.scrolled .nav-actions a { width: 100%; text-align: center; }
  .navbar.scrolled .login-btn { color: #fff !important; }
  .navbar.scrolled .signup-btn { background: #8b5cf6 !important; border-color: #8b5cf6 !important; color: #fff !important; }
}