/* ========================================
   MAIN LAYOUT STYLES
   ======================================== */

:root {
   --primary-color: #667eea;
   --primary-dark: #764ba2;
   --secondary-color: #f093fb;
   --text-dark: #1a202c;
   --text-light: #718096;
   --bg-light: #f7fafc;
   --border-color: #e2e8f0;
   --white: #ffffff;
   --transition: all 0.3s ease;
}

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

body {
   font-family: 'Inter', sans-serif;
   color: var(--text-dark);
   line-height: 1.6;
   overflow-x: hidden;
}

/* ========================================
   HEADER
   ======================================== */

.main-header {
   position: fixed;
   top: 0;
   left: 0;
   right: 0;
   z-index: 1000;
   background: rgba(255, 255, 255, 0.95);
   backdrop-filter: blur(10px);
   box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
   transition: var(--transition);
}

.main-header.scrolled {
   background: rgba(255, 255, 255, 0.98);
   box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.main-header .navbar {
   padding: 0.75rem 0;
}

.main-header .logo {
   height: 50px;
   transition: var(--transition);
}

.main-header.scrolled .logo {
   height: 45px;
}

.navbar-nav {
   gap: 0.5rem;
}

.navbar-nav .nav-link {
   color: var(--text-dark);
   font-weight: 500;
   font-size: 1rem;
   padding: 0.5rem 1rem;
   transition: var(--transition);
   position: relative;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link:focus {
   color: var(--primary-color);
}

.navbar-nav .nav-link::after {
   content: '';
   position: absolute;
   bottom: 0;
   left: 50%;
   transform: translateX(-50%) scaleX(0);
   width: 80%;
   height: 2px;
   background: linear-gradient(90deg, var(--primary-color), var(--primary-dark));
   transition: transform 0.3s ease;
}

.navbar-nav .nav-link:hover::after {
   transform: translateX(-50%) scaleX(1);
}

.navbar-nav .btn-primary {
   background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
   border: none;
   padding: 0.75rem 2rem;
   border-radius: 50px;
   color: var(--white);
   font-weight: 600;
   font-size: 1rem;
   box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
   transition: var(--transition);
   margin-left: 1.5rem;
}

.navbar-nav .btn-primary:hover {
   transform: translateY(-2px);
   box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

.navbar-nav .btn-outline-primary {
   border: 2px solid var(--primary-color);
   color: var(--primary-color);
   padding: 0.5rem 1.5rem;
   border-radius: 50px;
   font-weight: 600;
   transition: var(--transition);
   margin-left: 1rem;
}

.navbar-nav .btn-outline-primary:hover {
   background: var(--primary-color);
   color: var(--white);
   transform: translateY(-2px);
}

.navbar-toggler {
   border: none;
   padding: 0.5rem;
}

.navbar-toggler:focus {
   box-shadow: none;
}

.navbar-toggler-icon {
   background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(26, 32, 44, 0.75)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* ========================================
   MAIN CONTENT
   ======================================== */

main {
   margin-top: 70px;
   min-height: calc(100vh - 70px);
}

/* ========================================
   FOOTER
   ======================================== */

.main-footer {
   background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
   color: rgba(255, 255, 255, 0.8);
   padding: 4rem 0 2rem;
}

.footer-about p {
   font-size: 0.95rem;
   line-height: 1.8;
   margin-bottom: 1.5rem;
}

.footer-logo {
   height: 40px;
   filter: brightness(0) invert(1);
}

.social-links {
   display: flex;
   gap: 0.75rem;
}

.social-links a {
   display: inline-flex;
   align-items: center;
   justify-content: center;
   width: 40px;
   height: 40px;
   background: rgba(102, 126, 234, 0.2);
   border-radius: 50%;
   color: var(--white);
   transition: var(--transition);
}

.social-links a:hover {
   background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
   transform: translateY(-3px);
}

.main-footer h5 {
   color: var(--white);
   font-weight: 700;
   font-size: 1.1rem;
   margin-bottom: 1.5rem;
   position: relative;
   padding-bottom: 0.75rem;
}

.main-footer h5::after {
   content: '';
   position: absolute;
   bottom: 0;
   left: 0;
   width: 40px;
   height: 3px;
   background: linear-gradient(90deg, var(--primary-color), var(--primary-dark));
   border-radius: 2px;
}

.footer-links {
   list-style: none;
   padding: 0;
}

.footer-links li {
   margin-bottom: 0.75rem;
}

.footer-links a {
   color: rgba(255, 255, 255, 0.7);
   text-decoration: none;
   transition: var(--transition);
   display: inline-block;
}

.footer-links a:hover {
   color: var(--white);
   padding-left: 5px;
}

.footer-contact {
   list-style: none;
   padding: 0;
}

.footer-contact li {
   display: flex;
   align-items: flex-start;
   margin-bottom: 1rem;
   gap: 0.75rem;
}

.footer-contact i {
   color: var(--primary-color);
   font-size: 1.25rem;
   margin-top: 0.15rem;
}

.footer-contact span {
   flex: 1;
}

.footer-bottom {
   margin-top: 3rem;
   padding-top: 2rem;
   border-top: 1px solid rgba(255, 255, 255, 0.1);
   text-align: center;
   font-size: 0.9rem;
   color: rgba(255, 255, 255, 0.6);
}

/* ========================================
   BACK TO TOP BUTTON
   ======================================== */

.back-to-top {
   position: fixed;
   right: 20px;
   bottom: 20px;
   width: 45px;
   height: 45px;
   background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
   color: var(--white);
   border-radius: 50%;
   display: flex;
   align-items: center;
   justify-content: center;
   text-decoration: none;
   box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
   opacity: 0;
   visibility: hidden;
   transition: var(--transition);
   z-index: 999;
}

.back-to-top.active {
   opacity: 1;
   visibility: visible;
}

.back-to-top:hover {
   transform: translateY(-5px);
   box-shadow: 0 6px 20px rgba(102, 126, 234, 0.5);
   color: var(--white);
}

.back-to-top i {
   font-size: 1.5rem;
}

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

@media (max-width: 991px) {
   .navbar-nav {
      padding: 1rem 0;
   }

   .navbar-nav .nav-link {
      padding: 0.75rem 0;
   }

   .navbar-nav .btn-primary,
   .navbar-nav .btn-outline-primary {
      margin-left: 0;
      margin-top: 1rem;
      display: inline-block;
      width: auto;
   }

   main {
      margin-top: 70px;
   }
}

@media (max-width: 767px) {
   .main-footer {
      padding: 3rem 0 1.5rem;
   }

   .main-footer h5 {
      margin-top: 1.5rem;
   }

   .main-footer .col-lg-4:first-child h5 {
      margin-top: 0;
   }
}