:root {
  --font-main: Arial, sans-serif;

  /* Colors - Light Theme */
  --bg-color: #f4f4f4;
  --color-text: #333;
  --color-header-bg: #1E5631;
  --color-header-text: white;
  --color-accent: #007bff;
  --color-section-bg: white;
  --color-border: #ddd;
  --color-button-bg: #eee;
  --color-button-text: #333;
  --color-h2: #4CAF50;
}

  /* Colors - Dark Theme */
body.dark-mode {
  --color-bg: #121212;
  --color-text: #000000;
  --color-header-bg: #2C2C2C;
  --color-header-text: #ffffff;
  --color-section-bg: rgba(155, 48, 255, 0.25);
  --color-button-bg: #333;
  --color-button-text: #f17fe2;
  --color-h2: #53ca4b;
  --color-p: #E0E0E0;
  --gradient-start: #A8FF60;
  --gradient-end: #00eaff;
  --glow-color: #00eaff;
}

body {
  font-family: var(--font-main);
  margin: 0;
  padding: 0;
  background: var(--bg-color);
  color: var(--color-text);
}

header {
  background: var(--color-header-bg);
  color: var(--color-header-text);
  padding: 40px;
  text-align: center;
}

section {
  padding: 30px;
  margin: 10px auto;
  max-width: 800px;
  background: white;
  border-radius: 10px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

section > p {
    letter-spacing: 1px;
    line-height: 1.8;
}

/* Light-mode*/
.skills-list {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 10px;
}

.skills-list li {
  background-color: var(--color-p);
  padding: 10px;
  border-radius: 8px;
  font-weight: bold;
  box-shadow: 3px 3px 2px;
}

#projects {
  padding: 40px;
  background-color:var(--color-section-bg);
}

.project {
  border: 1px solid #ddd;
  padding: 20px;
  margin-bottom: 30px;
  border-radius: 12px;
  background-color: white;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.project img {
  width: 100%;
  max-width: 500px;
}

.project h3 {
  margin-top: 15px;
  color: #333;
}

.project a {
  display: inline-block;
  margin-top: 10px;
  text-decoration: none;
  color: white;
  background-color: var(--color-accent);
  padding: 10px 20px;
  border-radius: 6px;
}

h2 {
  color: var(--color-h2);
}

footer {
  text-align: center;
  padding: 20px;
  background: #ddd;
  margin-top: 30px;
}

#theme-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  padding: 10px 10px;
  border: none;
  border-radius: 10px;
  color: var(--color-button-text);
  background-color: var(--color-button-bg);
  cursor: pointer;
  z-index: 1000;
  transition: all 0.3s ease;
}

#theme-toggle:hover {
  transform: scale(1.1);
  background-color: #00c896;;
  color: white;
  box-shadow: 0 0 10px 3px rgba(0, 200, 150, 0.7);
}

/* Dark-Mode*/
body.dark-mode #theme-toggle {
  background-color: #333;
  color: #f17fe2;
}

body.dark-mode #theme-toggle:hover {
  background-color: #00eaff;
  color: #121212;
  transform: scale(1.1);
  box-shadow: 0 0 15px 4px rgba(0, 234, 255, 0,9);
}

body.dark-mode header {
  background-color: #2C2C2C;
  color: #ffffff;
}

body.dark-mode {
  background-color: #121212;
  color: #000000;
}

body.dark-mode #about {
  background-color: rgba(155, 48, 255, 0.25);
  color: var(--color-p);
  padding: 2.5rem;
}

body.dark-mode .skills-list li {
  background-color: #2a2a2a;
  color: var(--color-p);
  box-shadow: 0 4px 10px rgba(83, 202, 75, 0.5);
}

body.dark-mode #projects p {
  color: var(--color-p);
}

body.dark-mode #about h2 {
  color: #A8FF60;
}

body.dark-mode #contact h2 {
  color: #A8FF60;
}

body.dark-mode #projects h2 {
  color: #3AAFA9;
}

body.dark-mode .project-title {
  color: white;
  position: relative;
  text-shadow: 0 0 8px #ffffff, 0 0 12px #4fc3f7;
}

body.dark-mode .project-title::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -5px;
  height: 2px;
  width: 100%;
  background: linear-gradient(90deg, #53ca4b, #00eaff);
  animation: underline-glow 1500ms infinite alternate;
}

/* body.dark-mode .project-title {
  background: linear-gradient(90deg, var(--gradient-start), var(--gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 0 8px var(--glow-color);
} */

body.dark-mode .project-title {
  color: var(--glow-color); /* fallback για Firefox */
  background: linear-gradient(90deg, var(--gradient-start), var(--gradient-end));
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 0 8px var(--glow-color);
}

body.dark-mode .project-description {
  color: #000 !important;
}

/* body.dark-mode a {
  color: #ffffff;
} */

body.dark-mode #contact {
  background-color:rgba(155, 48, 255, 0.25);
  color: #E0E0E0;
  padding: 2.5rem;
}

@keyframes underline-glow {
  0% {
    opacity: 0.4;
    transform: scaleX(0.8);
  }
  100% {
    opacity: 1;
    transform: scaleX(1.1);
  }
}

@media screen and (max-width: 768px) {
  body {
    padding: 10px;
  }

  header {
    padding: 20px;
  }

  section {
    padding: 20px;
    margin: 10px 5px;
  }

  h1 {
    font-size: 1.8rem;
  }

  h2 {
    font-size: 1.4rem;
  }

  p {
    font-size: 1rem;
  }
}