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

:root {
  --bg:         #0f0f0f;
  --bg-card:    #1a1a1a;
  --bg-card-hover: #222222;
  --border:     #2a2a2a;
  --text:       #e5e5e5;
  --text-muted: #888888;
  --accent:     #38bdf8;
  --accent-dim: rgba(56, 189, 248, 0.12);
  --accent-2:   #4ade80;
  --accent-2-dim: rgba(74, 222, 128, 0.10);
  --font:       'Segoe UI', system-ui, -apple-system, sans-serif;
  --mono:       'Fira Code', 'Cascadia Code', monospace;
  --max-w:      1100px;
  --radius:     8px;
  --transition: 0.2s ease;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.7;
}

a { color: var(--accent); text-decoration: none; transition: opacity var(--transition); }
a:hover { opacity: 0.75; }

ul { list-style: none; }

/* ── Utility ── */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 2rem;
}

.btn {
  display: inline-block;
  padding: 0.65rem 1.5rem;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
}

.btn-primary {
  background: var(--accent);
  color: #0f0f0f;
}
.btn-primary:hover { opacity: 0.85; }

.btn-outline {
  border: 1.5px solid var(--accent);
  color: var(--accent);
  background: transparent;
}
.btn-outline:hover { background: var(--accent-dim); }

.section-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--text);
}
.section-title::after {
  content: '';
  display: block;
  width: 3rem;
  height: 3px;
  background: var(--accent);
  margin-top: 0.5rem;
}

.section-sub {
  color: var(--text-muted);
  margin-bottom: 2.5rem;
  max-width: 55ch;
}

/* ── Nav ── */
#navbar {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 2rem;
  background: rgba(15, 15, 15, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition);
}

#navbar.scrolled { border-bottom-color: var(--border); }

.nav-logo {
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--accent);
  letter-spacing: 0.05em;
}

.nav-links {
  display: flex;
  gap: 2rem;
}
.nav-links a {
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: color var(--transition);
}
.nav-links a:hover,
.nav-links a.active { color: var(--accent); opacity: 1; }

.nav-toggle { display: none; background: none; border: none; color: var(--text); font-size: 1.4rem; cursor: pointer; }

/* ── Hero ── */
#hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 6rem 2rem 4rem;
  position: relative;
}

.hero-greeting {
  font-family: var(--mono);
  color: var(--accent);
  font-size: 1rem;
  margin-bottom: 0.5rem;
}

.hero-name {
  font-size: clamp(2.5rem, 8vw, 5rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-tagline {
  font-size: 1.2rem;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
}

.hero-sub {
  max-width: 50ch;
  color: var(--text-muted);
  margin: 0 auto 2rem;
}

.hero-cta { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

.hero-scroll-hint {
  position: absolute;
  bottom: 2rem;
  font-size: 1.4rem;
  color: var(--text-muted);
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(8px); }
}

/* ── About ── */
#about {
  padding: 6rem 0;
  border-top: 1px solid var(--border);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 4rem;
  align-items: center;
}

.about-text p { color: var(--text-muted); margin-bottom: 1rem; }
.about-text p strong { color: var(--text); }
.about-text .btn { margin-top: 0.5rem; }

.about-image-wrap {
  display: flex;
  justify-content: center;
}

.about-image-placeholder {
  width: 260px;
  height: 260px;
  border-radius: 50%;
  border: 2px dashed var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.9rem;
  background: var(--bg-card);
}

/* ── Projects ── */
#projects {
  padding: 6rem 0;
  border-top: 1px solid var(--border);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  transition: transform var(--transition), border-color var(--transition), background var(--transition);
}

.project-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
  background: var(--bg-card-hover);
}

.project-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1rem;
}

.project-icon { font-size: 1.75rem; }

.project-links { display: flex; gap: 0.75rem; }
.project-links a { font-size: 0.8rem; color: var(--text-muted); }
.project-links a:hover { color: var(--accent); opacity: 1; }

.project-card h3 { font-size: 1.15rem; margin-bottom: 0.5rem; }

.project-card p { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 1.25rem; }

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.project-tags li {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--accent-2);
  background: var(--accent-2-dim);
  padding: 0.2rem 0.65rem;
  border-radius: 4px;
}

/* ── Skills ── */
#skills {
  padding: 6rem 0;
  border-top: 1px solid var(--border);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1.5rem;
}

.skill-group {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
}

.skill-group h3 {
  font-size: 0.85rem;
  font-family: var(--mono);
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1rem;
}

.skill-group ul { display: flex; flex-direction: column; gap: 0.5rem; }

.skill-group li {
  color: var(--text-muted);
  font-size: 0.9rem;
  padding-left: 1rem;
  position: relative;
}
.skill-group li::before {
  content: '▹';
  position: absolute;
  left: 0;
  color: var(--accent-2);
}

/* ── Contact ── */
#contact {
  padding: 6rem 0;
  border-top: 1px solid var(--border);
}

.contact-inner {
  max-width: 600px;
  text-align: center;
}

.contact-email {
  font-size: 1.1rem;
  margin-top: 0.5rem;
}

.social-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-top: 2rem;
}

.social-links a {
  color: var(--text-muted);
  font-size: 0.95rem;
  transition: color var(--transition);
}
.social-links a:hover { color: var(--accent); opacity: 1; }

/* ── Weather Widget (nav-inline) ── */
.nav-left {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.weather-widget {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 0.2rem 0.65rem;
  white-space: nowrap;
  transition: border-color var(--transition);
}
.weather-widget:hover { border-color: var(--accent); }

.weather-time { color: var(--text); letter-spacing: 0.02em; }

.weather-icon { font-size: 0.85rem; line-height: 1; }

.weather-temp { color: var(--accent-2); font-weight: 600; }

/* ── Footer ── */
footer {
  text-align: center;
  padding: 2rem;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 1.5rem 2rem;
    gap: 1rem;
  }
  .nav-toggle { display: block; }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .about-image-wrap { order: -1; }
  .about-image-placeholder { width: 200px; height: 200px; }

  #hero { padding-top: 5rem; }
}

/* ── Fade-in animation ── */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}