:root {
 --primary-bg: #ffffff;
 --secondary-bg: #f8f9fa;
 --text-color: #212529;
 --accent-color: #ff0000;
 --nav-bg: rgba(255, 255, 255, 0.95);
 --card-bg: #ffffff; 
 --footer-bg: #212529;
 --footer-text: #ffffff;
}

html {
 data-theme: "dark";
}

[data-theme="dark"] {
 --primary-bg: #1a1a1a;
 --secondary-bg: #2d2d2d;
 --text-color: #888888;
 --accent-color: #ff4d4d;
 --nav-bg: rgba(26, 26, 26, 0.95);
 --card-bg: #2d2d2d;
 --footer-bg: #000000;
 --footer-text: #ffffff;
}

[data-theme="light"] {
  --primary-bg: #ffffff;  
  --secondary-bg: #f8f9fa;
  --text-color: #212529;
  --accent-color: #ff0000;
  --nav-bg: rgba(255, 255, 255, 0.95);
  --card-bg: #ffffff;
  --footer-bg: #212529;
  --footer-text: #ffffff;
}


body {
 font-family: 'Roboto Slab', serif;
 background-color: var(--primary-bg);
 color: var(--text-color);
 transition: background-color 0.3s ease, color 0.3s ease;
}

h1, h2, h3, h4, h5, h6 {
 font-family: 'Montserrat', sans-serif;
 font-weight: 700;
}

.navbar {
 background-color: var(--nav-bg);
 padding: 1rem 0;
 transition: all 0.3s ease;
 position: fixed;
 width: 100%;
 top: 0;
 z-index: 1030;
}

.navbar-brand img {
 height: 50px;
}

.navbar-toggler {
 border: 2px solid #fff;
}

.navbar-toggler-icon {
 background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='30' height='30' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(255, 255, 255, 1)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e") !important;
}

[data-theme="light"] .navbar-toggler {
 border: 2px solid #000;
}

[data-theme="light"] .navbar-toggler-icon {
 background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='30' height='30' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(0, 0, 0, 1)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e") !important;
}

.navbar-nav {
 margin-left: auto;
 display: flex;
 align-items: center;
}

.nav-link {
 color: var(--text-color) !important;
 font-weight: 600;
 margin: 0 1rem;
 transition: color 0.3s ease;
}

.nav-link:hover {
 color: var(--accent-color) !important;
}

@media (min-width: 992px) {
 .navbar-collapse {
   display: flex !important;
   flex-basis: auto;
 }
 .navbar-toggler {
   display: none;
 }
 .navbar-nav {
   flex-direction: row;
 }
}

.masthead {
 position: relative;
 padding-top: 10.5rem;
 padding-bottom: 6rem;
 text-align: center;
 color: #ffffff;
 background-image: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('header.png');
 background-repeat: no-repeat;
 background-attachment: scroll;
 background-position: center center;
 background-size: cover;
 margin-top: 76px;
}

.masthead-heading {
 font-size: 3.25rem;
 font-weight: 700;
 line-height: 3.25rem;
 margin-bottom: 2rem;
}

.masthead-subheading {
 font-size: 1.5rem;
 line-height: 1.5rem;
 margin-bottom: 25px;
}

.section {
 padding: 6rem 0;
}

.section-heading {
 font-size: 2.5rem;
 margin-bottom: 2rem;
 color: var(--text-color);
}

.section-subheading {
 font-size: 1.2rem;
 margin-bottom: 4rem;
 color: var(--text-color);
 opacity: 0.8;
}

.card {
 background-color: var(--card-bg);
 border: none;
 border-radius: 10px;
 transition: transform 0.3s ease, box-shadow 0.3s ease;
 margin-bottom: 2rem;
}

.card:hover {
 transform: translateY(-5px);
 box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

.card-body {
 padding: 2rem;
}

.theme-toggle {
 position: relative;
 width: 60px;
 height: 30px;
 margin: 0 1rem;
}

.theme-toggle input {
 opacity: 0;
 width: 0;
 height: 0;
}

.theme-toggle-slider {
 position: absolute;
 cursor: pointer;
 top: 0;
 left: 0;
 right: 0;
 bottom: 0;
 background-color: #ccc;
 transition: .4s;
 border-radius: 30px;
}

.theme-toggle-slider:before {
 position: absolute;
 content: "";
 height: 22px;
 width: 22px;
 left: 4px;
 bottom: 4px;
 background-color: white;
 transition: .4s;
 border-radius: 50%;
}

input:checked + .theme-toggle-slider {
 background-color: var(--accent-color);
}

input:checked + .theme-toggle-slider:before {
 transform: translateX(30px);
}

.footer {
 background-color: var(--footer-bg);
 color: var(--footer-text);
 padding: 4rem 0;
}

.footer-heading {
 color: var(--accent-color);
 margin-bottom: 1.5rem;
}

.footer-link {
 color: var(--footer-text);
 text-decoration: none;
 transition: color 0.3s ease;
}

.footer-link:hover {
 color: var(--accent-color);
}

@media (max-width: 991px) {
 .navbar-nav {
   margin: 1rem 0;
 }
 .theme-toggle {
   margin: 1rem auto;
 }
}

@media (max-width: 768px) {
 .masthead-heading {
   font-size: 2rem;
   line-height: 2rem;
 }
 
 .masthead-subheading {
   font-size: 1.2rem;
   line-height: 1.2rem;
 }
 
 .section {
   padding: 4rem 0;
 }
 
 .section-heading {
   font-size: 2rem;
 }
}