/* =======================
   GLOBAL RESET
======================= */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

/* =======================
   DARK THEME (DEFAULT)
======================= */
body {
  min-height: 100vh;
  background: radial-gradient(circle at top, #0f2027, #020617);
  color: #e5e7eb;
  overflow-x: hidden;
}

/* =======================
   TECH BACKGROUND GLOW
======================= */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(circle at 20% 20%, rgba(0,229,255,0.15), transparent 40%),
    radial-gradient(circle at 80% 30%, rgba(99,102,241,0.15), transparent 40%),
    radial-gradient(circle at 50% 80%, rgba(16,185,129,0.15), transparent 40%);
  z-index: -1;
}

/* =======================
   HERO SECTION
======================= */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 40px 20px;
  position: relative;
}

.avatar {
  width: 160px;
  height: 160px;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid rgba(255, 255, 255, 0.25);
  box-shadow: 0 0 30px rgba(0, 229, 255, 0.4);
  margin-bottom: 20px;
}

.hero h1 {
  font-size: 2.6rem;
  margin-bottom: 10px;
}

.hero p {
  font-size: 1.1rem;
  opacity: 0.85;
  margin-bottom: 25px;
}

/* =======================
   LINKS & BUTTONS
======================= */
.links {
  display: flex;
  gap: 15px;
  flex-wrap: wrap;
  justify-content: center;
}

.links a,
.cv-btn {
  text-decoration: none;
  color: #0f2027;
  background: #00e5ff;
  padding: 10px 22px;
  border-radius: 30px;
  font-weight: 600;
  transition: 0.3s;
}

.links a:hover,
.cv-btn:hover {
  background: #ffffff;
}

/* =======================
   THEME TOGGLE
======================= */
#theme-toggle {
  position: absolute;
  top: 25px;
  right: 25px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  padding: 10px 12px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  cursor: pointer;
  color: white;
  font-size: 1.2rem;
}

/* =======================
   SECTIONS
======================= */
.section {
  padding: 80px 20px;
  max-width: 900px;
  margin: auto;
  text-align: center;
  opacity: 0;
  transform: translateY(40px);
  transition: all 0.8s ease;
}

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

.section h2 {
  font-size: 2rem;
  margin-bottom: 20px;
  color: #00e5ff;
}

.section p {
  font-size: 1.1rem;
  line-height: 1.7;
  opacity: 0.9;
}

/* =======================
   SKILLS
======================= */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 20px;
  margin-top: 40px;
}

.skill-card {
  background: rgba(255, 255, 255, 0.08);
  border-radius: 16px;
  padding: 20px;
  font-weight: 600;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  transition: transform 0.3s, box-shadow 0.3s;
}

.skill-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 0 20px rgba(0, 229, 255, 0.5);
}

/* =======================
   PROJECTS
======================= */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.project-card {
  background: rgba(255, 255, 255, 0.07);
  border-radius: 20px;
  padding: 25px;
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  transition: transform 0.3s, box-shadow 0.3s;
}

.project-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 0 25px rgba(0, 229, 255, 0.4);
}

.project-card h3 {
  margin-bottom: 10px;
  color: #00e5ff;
}

.project-card span {
  display: block;
  margin-top: 15px;
  font-size: 0.9rem;
  opacity: 0.8;
}

/* =======================
   LIGHT MODE
======================= */
body.light {
  background: linear-gradient(135deg, #f8fafc, #e2e8f0);
  color: #0f172a;
}

body.light .section h2 {
  color: #0f172a;
}

body.light .skill-card,
body.light .project-card {
  background: rgba(255, 255, 255, 0.9);
  border-color: rgba(0, 0, 0, 0.1);
}

/* =======================
   RESPONSIVE
======================= */
@media (max-width: 600px) {
  .hero h1 {
    font-size: 2.1rem;
  }

  .hero p {
    font-size: 1rem;
  }
}