:root {
  --background-color: #f0f0f0;
  --link-color: #0078d7;
  --text-color: #333;
  --text-footer-color: #666;

  --max-width: 1400px;
  --side-padding: 50px;
}

@font-face {
  font-family: "Proxima Nova";
  src: url("../fonts/proxima-nova-regular.ttf") format("truetype");
}

@font-face {
  font-family: "JetBrains Mono";
  src: url("../fonts/JetBrainsMono-Regular.ttf") format("truetype");
}

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

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--background-color);
  color: var(--text-color);
  display: flex;
  flex-direction: column;
  font-family: "Proxima Nova", sans-serif;
  margin: 0;
  min-height: 100vh;
  padding-top: 0px;
}

.container {
  box-sizing: border-box;
  margin-left: auto;
  margin-right: auto;
  max-width: var(--max-width);
  padding-left: var(--side-padding);
  padding-right: var(--side-padding);
}

main {
  flex-grow: 1;
}

nav {
  align-items: center;
  display: flex;
  font-family: "Poppins", sans-serif;
  justify-content: space-between;
  width: 100%;
  height: 100%;
  line-height: 1;
}

.nav-left {
  align-items: center;
  display: flex;
  gap: 20px;
}

.logo {
  display: block;
  height: 35px;
  transition: filter 0.3s, opacity 0.3s;
  width: auto;
}

.nav-left a:first-child:hover .logo {
  filter: contrast(85%);
  opacity: 0.8;
}

.nav-title {
  color: var(--text-color);
  font-size: 28px;
  font-weight: 600;
  text-decoration: none;
  transition: color 0.2s;
}

.nav-title:hover {
  color: var(--link-color);
}

.logo {
  display: block;
  height: 35px;
  width: auto;
}

nav ul {
  display: flex;
  gap: 30px;
  list-style: none;
  margin: 0;
  padding: 0;
}

nav ul li a {
  align-items: center;
  color: #333;
  font-size: 18px;
  font-weight: 500;
  text-decoration: none;
  transition: color 0.2s;
}

nav ul li a:hover {
  color: var(--link-color);
}

#header {
  align-items: center;
  background: var(--background-color);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
  height: 60px;
  left: 0;
  overflow: visible;
  position: fixed;
  top: 0;
  transition: transform 0.3s ease;
  width: 100%;
  z-index: 1000;
}

#header .container {
  align-items: center;
  box-sizing: border-box;
  display: flex;
  height: 100%;
  justify-content: space-between;
  margin-left: auto;
  margin-right: auto;
  max-width: var(--max-width);
  padding-left: var(--side-padding);
  padding-right: var(--side-padding);
}

.header-text {
  font-size: 30px;
  margin-top: 5%;
  margin-left: auto;
  margin-right: auto;
  max-width: var(--max-width);
  padding-left: var(--side-padding);
  padding-right: var(--side-padding);
  text-align: left;
}

.header-text h1 {
  font-size: 50px;
  margin-top: 20px;
}

.back-to-top {
  align-items: center;
  background: #191717;
  border-radius: 50%;
  bottom: 40px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  color: #fff;
  display: none;
  font-size: 24px;
  height: 48px;
  justify-content: center;
  opacity: 0.8;
  padding: 0;
  position: fixed;
  right: 40px;
  text-decoration: none;
  transition: background 0.2s, opacity 0.2s, transform 0.2s;
  width: 48px;
  z-index: 1200;
}

.back-to-top:hover {
  background: #151515;
  opacity: 1;
  transform: translateY(-4px) scale(1.08);
}

.footer {
  align-content: center;
  border-top: 1px solid #e5e7eb;
  box-sizing: border-box;
  display: flex;
  font-family: "JetBrains Mono", monospace;
  justify-content: space-between;
  left: 0;
  margin-left: auto;
  margin-right: auto;
  margin-top: auto;
  max-width: var(--max-width);
  padding-bottom: 10px;
  padding-left: var(--side-padding);
  padding-right: var(--side-padding);
  padding-top: 10px;
  width: 100%;
  z-index: 100;
}

.footer-text {
  color: var(--text-footer-color);
  padding: 10px 0;
  text-decoration: none;
  text-size-adjust: 32px;
}

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

.footer-left {
  align-items: center;
  display: flex;
  gap: 20px;
}

.footer-right {
  align-items: center;
  display: flex;
  gap: 20px;
}

.footer-right .social-icon {
  width: 20px;
  height: 20px;
  filter: grayscale(100%) brightness(150%);
  transition: filter 0.2s;
}

.footer-right a:hover .social-icon {
  filter: invert(30%) sepia(80%) saturate(1000%) hue-rotate(190deg)
    brightness(95%);
}

.button-container {
  display: flex;
  justify-content: center;
  margin-bottom: 50px;
  margin-top: 30px;
}

.button {
  align-items: center;
  background-color: var(--link-color);
  border: none;
  border-radius: 8px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
  color: #fff;
  display: inline-flex;
  font-size: 1rem;
  font-weight: 600;
  justify-content: center;
  padding: 12px 25px;
  text-decoration: none;
  transition: background-color 0.3s ease, transform 0.2s ease,
    box-shadow 0.2s ease;
}

.button:hover {
  background-color: #005fa3;
  transform: translateY(-2px);
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}

.icon-list {
  align-items: stretch;
  display: grid;
  gap: 24px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  justify-items: center;
  justify-content: center;
  list-style: none;
  margin: 24px auto 32px auto;
  padding: 0;
  max-width: 1200px;
}

.icon-list li {
  align-items: center;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.07);
  color: var(--text-color);
  display: flex;
  flex-direction: column;
  font-size: 1.1rem;
  gap: 24px;
  height: 150px;
  justify-content: center;
  min-height: 120px;
  min-width: 120px;
  padding: 28px 12px 18px 12px;
  text-align: center;
  transition: box-shadow 0.2s, transform 0.2s;
  width: 220px;
}

.icon-list .card-icon {
  height: 2.2em;
  width: 2.2em;
  filter: sepia(100%) hue-rotate(180deg) saturate(200%) brightness(80%);
  transition: filter 0.2s;
}

.icon-list li:hover .card-icon {
  /* Changed from .icon-list li:hover i */
  filter: sepia(100%) hue-rotate(200deg) saturate(300%) brightness(100%); /* Example for hover */
}

.icon-list li:hover {
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.13);
  transform: translateY(-6px) scale(1.04);
}

.icon-list li:hover i {
  color: #005fa3;
}

.about-me-container {
  font-size: 1.3rem;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--side-padding);
}

/* Responsive: stack cards on smaller screens */
@media (max-width: 1100px) {
  .icon-list {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }
}
@media (max-width: 700px) {
  .icon-list {
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
  }
}
@media (max-width: 480px) {
  .icon-list {
    grid-template-columns: 1fr;
    gap: 14px;
  }
}