:root {
  --default-font: "Roboto",  system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "Liberation Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
  --heading-font: "Ubuntu",  sans-serif;
  --nav-font: "Raleway",  sans-serif;
}

/* Global Colors - The following color variables are used throughout the website. Updating them here will change the color scheme of the entire website */
:root { 
  --background-color: #25303f; /* Background color for the entire website, including individual sections */
  --default-color: #f3f4f6; /* Default color used for the majority of the text content across the entire website */
  --heading-color: #f9fafb; /* Color for headings, subheadings and title throughout the website */
  --accent-color: #22e7a1; /* Accent color that represents your brand on the website. It's used for buttons, links, and other elements that need to stand out */
  --surface-color: #293443; /* The surface color is used as a background of boxed elements within sections, such as cards, icon boxes, or other elements that require a visual separation from the global background. */
  --contrast-color: #1f2937; /* Contrast color for text, ensuring readability against backgrounds of accent, heading, or default colors. */
}

/* Nav Menu Colors - The following color variables are used specifically for the navigation menu. They are separate from the global colors to allow for more customization options */
:root {
  --nav-color: #f3f4f6;  /* The default color of the main navmenu links */
  --nav-hover-color: #22e7a1; /* Applied to main navmenu links when they are hovered over or active */
  --nav-mobile-background-color: #38485f; /* Used as the background color for mobile navigation menu */
  --nav-dropdown-background-color: #38485f; /* Used as the background color for dropdown items that appear when hovering over primary navigation items */
  --nav-dropdown-color: #f3f4f6; /* Used for navigation links of the dropdown items in the navigation menu. */
  --nav-dropdown-hover-color: #22e7a1; /* Similar to --nav-hover-color, this color is applied to dropdown navigation links when they are hovered over. */
}

/* Color Presets - These classes override global colors when applied to any section or element, providing reuse of the sam color scheme. */

.light-background {
  --background-color: #293341;
  --surface-color: #4b607f;
}

.dark-background {
  --background-color: #1c2737;
  --default-color: #ffffff;
  --heading-color: #ffffff;
  --surface-color: #151f2b;
  --contrast-color: #ffffff;
}

/* Smooth scroll */
:root {
  scroll-behavior: smooth;
}

/*--------------------------------------------------------------
# General Styling & Shared Classes
--------------------------------------------------------------*/
body {
  color: var(--default-color);
  background-color: var(--background-color);
  font-family: var(--default-font);
}

a {
  color: var(--accent-color);
  text-decoration: none;
  transition: 0.3s;
}

a:hover {
  color: color-mix(in srgb, var(--accent-color), transparent 25%);
  text-decoration: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  color: var(--heading-color);
  font-family: var(--heading-font);
}

/* PHP Email Form Messages
------------------------------*/
.php-email-form .error-message {
  display: none;
  background: #df1529;
  color: #ffffff;
  text-align: left;
  padding: 15px;
  margin-bottom: 24px;
  font-weight: 600;
}

.php-email-form .sent-message {
  display: none;
  color: #ffffff;
  background: #059652;
  text-align: center;
  padding: 15px;
  margin-bottom: 24px;
  font-weight: 600;
}

.php-email-form .loading {
  display: none;
  background: var(--surface-color);
  text-align: center;
  padding: 15px;
  margin-bottom: 24px;
}

.php-email-form .loading:before {
  content: "";
  display: inline-block;
  border-radius: 50%;
  width: 24px;
  height: 24px;
  margin: 0 10px -6px 0;
  border: 3px solid var(--accent-color);
  border-top-color: var(--surface-color);
  animation: php-email-form-loading 1s linear infinite;
}

@keyframes php-email-form-loading {
  0% {
    transform: rotate(0deg);
  }

  100% {
    transform: rotate(360deg);
  }
}

/*--------------------------------------------------------------
# Global Header
--------------------------------------------------------------*/
.header {
  color: var(--default-color);
  background-color: var(--background-color);
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  padding: 0 15px;
  width: 300px;
  transition: all ease-in-out 0.3s;
  overflow-y: auto;
  z-index: 997;
}

.header .profile-img img {
  margin: 25px auto;
  display: block;
  border-radius: 20px;
  max-width: 220px;
  border: 8px solid color-mix(in srgb, var(--default-color), transparent 85%);
}

.header .logo {
  line-height: 1;
}

.header .logo img {
  max-height: 32px;
  margin-right: 8px;
}

.header .logo h1 {
  font-size: 24px;
  margin: 0;
  font-weight: 300;
  color: var(--heading-color);
}

.header .social-links {
  margin: 0 0 20px 0;
}

.header .social-links a {
  font-size: 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: color-mix(in srgb, var(--default-color), transparent 90%);
  color: var(--default-color);
  margin: 0 2px;
  border-radius: 9px;
  text-align: center;
  width: 40px;
  height: 40px;
  transition: 0.3s;
}

.header .social-links a:hover {
  color: var(--contrast-color);
  background: var(--accent-color);
}

@media (min-width: 1200px) {

  .header~main,
  .header~#footer {
    margin-left: 310px;
  }
}

@media (max-width: 1199px) {
  .header {
    left: -100%;
  }
}

.header.header-show {
  left: 0;
}

.header .header-toggle {
  color: var(--background-color);
  background-color: var(--accent-color);
  font-size: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 9px;
  cursor: pointer;
  position: fixed;
  top: 15px;
  right: 15px;
  z-index: 9999;
  transition: 0.3s;
}

.header .header-toggle:hover {
  background-color: color-mix(in srgb, var(--accent-color) 90%, black 15%);
}

/*--------------------------------------------------------------
# Navigation Menu
--------------------------------------------------------------*/
.mobile-nav-toggle {
  display: none;
}

.navmenu {
  padding: 0;
  z-index: 9997;
  flex: 1;
  display: flex;
  align-items: center;
}

.navmenu ul {
  list-style: none;
  padding: 0 0 20px 0;
  margin: 0;
  width: 100%;
}

.navmenu a,
.navmenu a:focus {
  color: var(--nav-color);
  padding: 15px 10px;
  font-family: var(--nav-font);
  font-size: 16px;
  font-weight: 400;
  display: flex;
  align-items: center;
  white-space: nowrap;
  transition: 0.3s;
  width: 100%;
}

.navmenu a .navicon,
.navmenu a:focus .navicon {
  font-size: 20px;
  margin-right: 10px;
}

.navmenu a .toggle-dropdown,
.navmenu a:focus .toggle-dropdown {
  font-size: 12px;
  line-height: 0;
  margin-left: auto;
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: 0.3s;
  flex-shrink: 0;
  background-color: color-mix(in srgb, var(--accent-color), transparent 90%);
}

.navmenu a .toggle-dropdown:hover,
.navmenu a:focus .toggle-dropdown:hover {
  background-color: var(--accent-color);
  color: var(--contrast-color);
}

.navmenu a:hover,
.navmenu .active,
.navmenu .active:focus {
  color: var(--nav-hover-color);
}

.navmenu a:hover .navicon,
.navmenu .active .navicon,
.navmenu .active:focus .navicon {
  color: var(--accent-color);
}

.navmenu .active .toggle-dropdown,
.navmenu .active:focus .toggle-dropdown {
  background-color: var(--accent-color);
  color: var(--contrast-color);
  transform: rotate(180deg);
}

.navmenu .dropdown {
  display: block;
}

.navmenu .dropdown a,
.navmenu .dropdown a:focus {
  color: --nav-dropdown-color;
}

.navmenu .dropdown a:hover,
.navmenu .dropdown .active,
.navmenu .dropdown .active:focus {
  color: var(--nav-dropdown-hover-color);
}

.navmenu .dropdown ul {
  position: static;
  display: none;
  z-index: 99;
  padding: 5px 10px;
  margin: 5px 10px;
  background-color: var(--nav-dropdown-background-color);
  border: 1px solid color-mix(in srgb, var(--default-color), transparent 90%);
  box-shadow: none;
  transition: all 0.5s ease-in-out;
}

.navmenu .dropdown ul ul {
  background-color: rgba(33, 37, 41, 0.1);
}

.navmenu .dropdown>.dropdown-active {
  display: block;
  background-color: rgba(33, 37, 41, 0.03);
}

/*--------------------------------------------------------------
# Global Footer
--------------------------------------------------------------*/
.footer {
  color: var(--default-color);
  background-color: var(--background-color);
  font-size: 14px;
  text-align: center;
  padding: 30px 0;
  position: relative;
}

.footer h3 {
  font-size: 36px;
  font-weight: 300;
  position: relative;
  padding: 0;
  margin: 0 0 15px 0;
}

.footer p {
  font-size: 15;
  font-style: italic;
  padding: 0;
  margin: 0 0 30px 0;
}

.footer .social-links {
  margin: 0 0 30px 0;
}

.footer .social-links a {
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-color);
  color: var(--contrast-color);
  line-height: 1;
  margin: 0 4px;
  border-radius: 50%;
  text-align: center;
  width: 36px;
  height: 36px;
  transition: 0.3s;
}

.footer .social-links a:hover {
  background: color-mix(in srgb, var(--accent-color), transparent 20%);
  text-decoration: none;
}

.footer .copyright {
  padding-top: 25px;
  border-top: 1px solid color-mix(in srgb, var(--default-color), transparent 90%);
}

.footer .credits {
  font-size: 13px;
  padding-top: 5px;
}









/* ============================= */
/* SIDEBAR FIX */
/* ============================= */
#header {
  width: 260px;
  min-width: 260px;
  height: 100vh;
  position: fixed;
  left: 0;
  top: 0;
}

/* ============================= */
/* MAIN CONTENT SHIFT */
/* ============================= */
main,
section,
footer {
  margin-left: 260px;
  padding: 20px;
}

/* ============================= */
/* ACHIEVEMENTS SECTION */
/* ============================= */
.achievements {
  text-align: center;
}

.section-title {
  font-size: 32px;
  font-weight: 600;
}

.section-subtitle {
  max-width: 700px;
  margin: 10px auto;
  color: #ccc;
}

/* ============================= */
/* CERTIFICATE CARD DESIGN */
/* ============================= */
.certificate-card {
  width: 100%;
  overflow: hidden;
  border-radius: 12px;
  background: #fff;
  padding: 10px;
  transition: 0.3s;
}

/* Hover Effect */
.certificate-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.2);
}

/* Certificate Image */
.certificate-card img {
  width: 100%;
  height: 250px;
  object-fit: cover;
  border-radius: 10px;
}

/* ============================= */
/* GRID SPACING */
/* ============================= */
.achievements .row {
  row-gap: 20px;
}

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

/* Tablet */
@media (max-width: 992px) {
  #header {
    width: 200px;
    min-width: 200px;
  }

  main,
  section,
  footer {
    margin-left: 200px;
  }
}

/* Mobile */
@media (max-width: 768px) {
  #header {
    left: -100%;
    position: fixed;
  }

  main,
  section,
  footer {
    margin-left: 0;
  }
}