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

:root {
  --bg: #0f172a;
  --text: white;
  --nav: transparent;
}

.light {
  --bg: #f8fafc;
  --text: #0f172a;
  --nav: #2563eb;
}

body {
  font-family: Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  scroll-behavior: smooth;
}

#progress-bar {
  position: fixed;
  top: 0;
  height: 4px;
  background: #22c55e;
  width: 0%;
  z-index: 2000;
}

.navbar {
  position: fixed;
  top: 4px;
  width: 100%;
  padding: 15px 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--nav);
  transition: 0.3s;
  z-index: 1000;
}

.navbar.scrolled {
  background: #2563eb;
}

.logo { font-size: 22px; font-weight: bold; }

.nav-links {
  list-style: none;
  display: flex;
  gap: 25px;
  position: relative;
}

.nav-links a {
  text-decoration: none;
  color: var(--text);
  font-weight: bold;
}

.underline {
  position: absolute;
  bottom: -5px;
  height: 3px;
  width: 60px;
  background: #22c55e;
  transition: 0.3s;
}

.menu-icon { display: none; font-size: 26px; cursor: pointer; }

#themeToggle {
  background: none;
  border: none;
  font-size: 22px;
  cursor: pointer;
  color: var(--text);
}

.section {
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 40px;
  opacity: 0;
  transform: translateY(50px);
  transition: 1s;
}

.section.show {
  opacity: 1;
  transform: translateY(0);
}

.subtitle { font-size: 22px; margin: 10px 0; }

.skill-list { list-style: none; font-size: 20px; }
.skill-list li { margin: 8px 0; }

.cta-btn {
  display: inline-block;
  margin-top: 20px;
  padding: 12px 25px;
  background: #22c55e;
  color: black;
  text-decoration: none;
  border-radius: 30px;
  font-weight: bold;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  max-width: 300px;
  margin: 8px 0;
  padding: 8px;
}

.contact-form button {
  padding: 10px 20px;
  margin-top: 10px;
  background: #22c55e;
  border: none;
  cursor: pointer;
}

#scrollTop {
  position: fixed;
  bottom: 30px;
  right: 30px;
  padding: 12px;
  font-size: 18px;
  display: none;
}

/* Mobile */
@media (max-width: 768px) {
  .menu-icon { display: block; }

  .nav-links {
    position: absolute;
    top: 60px;
    right: 0;
    background: #2563eb;
    flex-direction: column;
    width: 200px;
    display: none;
  }

  .nav-links.show { display: flex; }
}