/* Variables */
:root {
  --primary-color: #22d3ee;
  --secondary-color: #3b82f6;
  --dark-bg: #121212;
  --light-text: #e0e0e0;
  --btn-radius: 30px;
  --transition-speed: 0.3s;
}

/* Reset */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  user-select: none;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: var(--dark-bg);
  color: var(--light-text);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

header {
  background-color: #111;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.8);
  position: sticky;
  top: 0;
  z-index: 1000;
}

/* Navigation */
.logo {
  font-weight: 700;
  font-size: 1.6rem;
  color: var(--primary-color);
  text-decoration: none;
  letter-spacing: 0.1em;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 1.5rem;
}

.nav-links a {
  color: var(--light-text);
  font-weight: 600;
  text-decoration: none;
  font-size: 1.05rem;
  padding: 0.3rem 0.5rem;
  border-radius: 5px;
  transition: background-color var(--transition-speed), color var(--transition-speed);
}

.nav-links a:hover,
.nav-links a:focus {
  background-color: var(--primary-color);
  color: var(--dark-bg);
  outline: none;
}

/* Burger Menu */
.burger {
  display: none;
  flex-direction: column;
  cursor: pointer;
  background: none;
  border: none;
  padding: 0;
  gap: 6px;
}

.burger-line {
  width: 25px;
  height: 3px;
  background-color: var(--light-text);
  border-radius: 2px;
  transition: all 0.3s ease;
}

/* Animate burger open */
.burger.open .burger-line:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.burger.open .burger-line:nth-child(2) {
  opacity: 0;
}
.burger.open .burger-line:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Buttons */
.btn-primary {
  display: inline-block;
  padding: 0.85rem 2rem;
  background-color: transparent;
  border: 2px solid var(--primary-color);
  color: var(--primary-color);
  border-radius: var(--btn-radius);
  font-size: 1.2rem;
  text-decoration: none;
  transition: background-color var(--transition-speed);
  box-shadow: 0 0 15px var(--primary-color);
  user-select: none;
}

.btn-primary:hover,
.btn-primary:focus {
  background-color: var(--primary-color);
  color: var(--dark-bg);
  outline: none;
  box-shadow: 0 0 25px var(--dark-bg);
}

/* Sections */
.section-container {
  max-width: 900px;
  margin: 3rem auto;
  padding: 0 1rem;
  line-height: 1.6;
}

h2 {
  font-weight: 700;
  margin-bottom: 1rem;
  font-size: 2rem;
  text-align: center;
  color: var(--primary-color);
  letter-spacing: 1.5px;
}

/* Skills grid */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(60px, 1fr));
  gap: 3rem;
  margin-top: 2rem;
  justify-items: center;
  padding: 0 1rem;
}

/* Circular skill badges */
.skill {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: #fff;
  font-weight: 700;
  font-size: 1.5rem;
  width: 76px;
  height: 76px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  user-select: none;
  box-shadow:
    0 3px 8px rgba(0, 0, 0, 0.15),
    0 0 8px var(--primary-color);
  cursor: default;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

/* Hover and focus effect */
.skill:hover,
.skill:focus {
  transform: translateY(-6px) scale(1.1);
  box-shadow:
    0 8px 16px rgba(0, 0, 0, 0.3),
    0 0 15px var(--primary-color),
    0 0 25px var(--secondary-color);
  outline: none;
}


/* Projects Grid */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit,minmax(280px,1fr));
  gap: 1.5rem;
  margin-top: 1rem;
  justify-items: center;
}

.project-card {
  background-color: var(--dark-bg);
  border-radius: 12px;
  padding: 1rem;
  width: 100%;
  max-width: 320px;
  box-shadow: 0 0 15px rgba(0,0,0,0.7);
  color: var(--light-text);
  display: flex;
  flex-direction: column;
  transition: transform 0.3s ease;
}

.project-card:hover,
.project-card:focus {
  transform: translateY(-8px);
  outline: none;
}

.project-title {
  font-weight: 700;
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
  color: var(--primary-color);
}

.project-desc {
  font-size: 0.95rem;
  flex-grow: 1;
  margin-bottom: 1rem;
  color: #ccc;
}

.project-link {
  align-self: flex-start;
  text-decoration: none;
  color: var(--secondary-color);
  font-weight: 600;
  transition: color var(--transition-speed);
}

.project-link:hover,
.project-link:focus {
  color: var(--primary-color);
  outline: none;
}

/* Contact buttons */
.contact-buttons {
  display: flex;
  gap: 2rem;
  justify-content: center;
  margin-top: 1rem;
  flex-wrap: wrap;
}

.contact-btn {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  background-color: var(--dark-bg);
  border-radius: 25px;
  padding: 0.75rem 1.5rem;
  font-weight: 600;
  color: var(--primary-color);
  text-decoration: none;
  box-shadow: 0 0 10px var(--primary-color);
  transition: background-color var(--transition-speed), color var(--transition-speed);
  user-select: none;
}

.contact-btn:hover,
.contact-btn:focus {
  background-color: var(--primary-color);
  color: var(--dark-bg);
  outline: none;
}

/* Footer */
footer {
  background-color: var(--dark-bg);
  text-align: center;
  padding: 1rem 0;
  font-size: 0.9rem;
  color: #666;
  margin-top: auto;
}

/* Responsive */
@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    right: 0;
    top: 0;
    height: 100vh;
    background-color: var(--dark-bg);
    flex-direction: column;
    width: 60%;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    padding-top: 4rem;
    gap: 1.5rem;
    z-index: 999;
  }
  .nav-links.open {
    transform: translateX(0);
  }

  .burger {
    display: flex;
  }
}