/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #0d0d0d;
  --surface: #141414;
  --card: #1a1a1a;
  --border: #2a2a2a;
  --accent: #a3e635;
  --accent-dark: #84cc16;
  --text: #f0f0f0;
  --muted: #888;
  --radius: 12px;
  --transition: 0.3s ease;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Segoe UI', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
}

a { color: inherit; text-decoration: none; }

/* ===== Buttons ===== */
.btn {
  display: inline-block;
  padding: 0.65rem 1.4rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all var(--transition);
  border: 2px solid transparent;
}
.btn-primary {
  background: var(--accent);
  color: #000;
}
.btn-primary:hover { background: var(--accent-dark); }
.btn-outline {
  background: transparent;
  border-color: var(--accent);
  color: var(--accent);
}
.btn-outline:hover { background: var(--accent); color: #000; }
.btn-sm { padding: 0.4rem 0.9rem; font-size: 0.85rem; }

/* ===== Nav ===== */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 2.5rem;
  background: rgba(13, 13, 13, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  transition: padding var(--transition);
}
#navbar.scrolled { padding: 0.6rem 2.5rem; }
.nav-brand {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 1px;
}
.nav-links {
  list-style: none;
  display: flex;
  gap: 2rem;
}
.nav-links a {
  color: var(--muted);
  font-size: 0.95rem;
  transition: color var(--transition);
}
.nav-links a:hover { color: var(--accent); }
.hamburger {
  display: none;
  background: none;
  border: none;
  color: var(--text);
  font-size: 1.5rem;
  cursor: pointer;
}

/* ===== Hero ===== */
#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  overflow: hidden;
  padding: 6rem 2rem 4rem;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 50% 40%, rgba(163,230,53,0.08) 0%, transparent 70%);
  pointer-events: none;
}
.hero-content { position: relative; z-index: 1; }
.hero-greeting {
  color: var(--accent);
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}
.hero-name {
  font-size: clamp(3rem, 8vw, 6rem);
  font-weight: 800;
  letter-spacing: -2px;
  line-height: 1.1;
  background: linear-gradient(135deg, #f0f0f0 40%, var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-tagline {
  font-size: 1.3rem;
  color: var(--muted);
  margin: 1rem 0 2.5rem;
}
.hero-actions { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* ===== Sections ===== */
section { padding: 5rem 1.5rem; }
.container { max-width: 1000px; margin: 0 auto; }
.section-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 3rem;
  text-align: center;
  position: relative;
}
.section-title::after {
  content: '';
  display: block;
  width: 50px;
  height: 3px;
  background: var(--accent);
  margin: 0.6rem auto 0;
  border-radius: 2px;
}

/* ===== About ===== */
#about { background: var(--surface); }
.about-grid {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 3rem;
  align-items: center;
}
.avatar-placeholder {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #65a30d);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.2rem;
  font-weight: 800;
  color: #000;
  flex-shrink: 0;
}
.about-text p { color: var(--muted); margin-bottom: 1rem; }
.about-text .btn { margin-top: 0.5rem; }

/* ===== Projects ===== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}
.project-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.8rem;
  transition: transform var(--transition), border-color var(--transition);
}
.project-card:hover { transform: translateY(-4px); border-color: var(--accent); }
.project-icon { font-size: 2rem; margin-bottom: 1rem; }
.project-card h3 { font-size: 1.15rem; margin-bottom: 0.5rem; }
.project-card p { color: var(--muted); font-size: 0.9rem; margin-bottom: 1rem; }
.project-tags { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-bottom: 1.2rem; }
.project-tags span {
  background: rgba(163,230,53,0.1);
  color: var(--accent);
  border: 1px solid rgba(163,230,53,0.25);
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
}
.project-links { display: flex; gap: 0.6rem; }

/* ===== Skills ===== */
#skills { background: var(--surface); }
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1rem;
}
.skill-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.2rem;
  text-align: center;
  font-weight: 600;
  font-size: 0.9rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  transition: border-color var(--transition), transform var(--transition);
}
.skill-item:hover { border-color: var(--accent); transform: translateY(-3px); }
.skill-icon { font-size: 1.8rem; }

/* ===== Contact ===== */
.contact-intro { text-align: center; color: var(--muted); margin-bottom: 2.5rem; }
.contact-form {
  max-width: 560px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.form-group input,
.form-group textarea {
  width: 100%;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.8rem 1rem;
  color: var(--text);
  font-size: 0.95rem;
  font-family: inherit;
  transition: border-color var(--transition);
  outline: none;
  resize: vertical;
}
.form-group input:focus,
.form-group textarea:focus { border-color: var(--accent); }
.contact-form .btn { align-self: flex-start; }
.form-note { font-size: 0.85rem; color: var(--accent); min-height: 1.2em; }

/* ===== Footer ===== */
footer {
  text-align: center;
  padding: 2rem;
  color: var(--muted);
  font-size: 0.88rem;
  border-top: 1px solid var(--border);
}
.footer-links { margin-top: 0.5rem; }
.footer-links a { color: var(--accent); margin: 0 0.5rem; }
.footer-links a:hover { text-decoration: underline; }

/* ===== Responsive ===== */
@media (max-width: 700px) {
  .nav-links { display: none; flex-direction: column; position: absolute; top: 100%; left: 0; right: 0; background: var(--surface); padding: 1rem 2rem; border-bottom: 1px solid var(--border); }
  .nav-links.open { display: flex; }
  .hamburger { display: block; }
  #navbar { padding: 1rem 1.5rem; }
  .about-grid { grid-template-columns: 1fr; text-align: center; }
  .avatar-placeholder { margin: 0 auto; }
  .about-text .btn { display: block; width: fit-content; margin: 0.5rem auto 0; }
}