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

/* ===== THEME VARIABLES ===== */
:root {
  --bg:      #fff;
  --text:    #111;
  --muted:   #555;
  --border:  #ddd;
  --border2: #eee;
  --nav-bg:  #fff;
  --pill-bg: transparent;
}

body.dark {
  --bg:      #111;
  --text:    #eee;
  --muted:   #aaa;
  --border:  #333;
  --border2: #222;
  --nav-bg:  #111;
  --pill-bg: transparent;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  transition: background 0.2s, color 0.2s;
}

a { color: #0645ad; text-decoration: underline; }

/* ===== NAVBAR ===== */
#navbar {
  position: sticky;
  top: 0;
  background: var(--nav-bg);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  height: 56px;
  z-index: 100;
  transition: background 0.2s;
}

.nav-brand {
  font-weight: 700;
  font-size: 1rem;
  color: var(--text);
  cursor: default;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 0.25rem;
}

.nav-link {
  padding: 0.4rem 0.85rem;
  font-size: 0.875rem;
  color: var(--muted);
  text-decoration: none;
  cursor: pointer;
}

.nav-link.active { color: var(--text); text-decoration: underline; }

/* theme toggle — fixed bottom-right */
#theme-toggle {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 200;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 1.1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s, border-color 0.15s;
  box-shadow: 0 2px 8px rgba(0,0,0,0.12);
}

/* hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
}

/* ===== LAYOUT ===== */
.tab { display: none; }
.tab.active { display: block; }

.container {
  max-width: 780px;
  margin: 0 auto;
  padding: 2.5rem 2rem;
}

/* ===== TYPOGRAPHY ===== */
h1 { font-size: 1.75rem; margin-bottom: 0.25rem; }
h2 { font-size: 1.1rem; margin-bottom: 1.5rem; border-bottom: 1px solid var(--border); padding-bottom: 0.4rem; }
h3 { font-size: 1rem; }

.page-subtitle { color: var(--muted); margin-bottom: 2rem; }

/* ===== HOME / HERO ===== */
.hero { padding-bottom: 2rem; margin-bottom: 2rem; border-bottom: 1px solid var(--border); }
.hero h1 { font-size: 2rem; }
.hero-role { font-size: 1.1rem; color: var(--muted); margin-bottom: 1rem; }
.hero-summary { max-width: 780px; color: var(--muted); }
.hero-links { margin-top: 1rem; display: flex; gap: 1rem; flex-wrap: wrap; font-size: 0.9rem; }

/* ===== SKILLS ===== */
.skills-group { margin-bottom: 1rem; }
.skills-label { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.5px; color: var(--muted); margin-bottom: 0.35rem; }
.pills { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.pill {
  padding: 0.2rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 0.8rem;
  color: var(--text);
}

/* ===== EDUCATION ===== */
.edu-entry { margin-bottom: 1.25rem; }
.edu-degree { font-weight: 600; }
.edu-meta { font-size: 0.875rem; color: var(--muted); }

/* ===== EXPERIENCE ===== */
.exp-entry { margin-bottom: 2rem; }
.exp-header { display: flex; justify-content: space-between; align-items: baseline; flex-wrap: wrap; gap: 0.25rem; margin-bottom: 0.25rem; }
.exp-position { font-weight: 600; }
.exp-dates { font-size: 0.85rem; color: var(--muted); }
.exp-company { font-size: 0.9rem; color: var(--muted); margin-bottom: 0.5rem; }
.exp-description { margin-bottom: 0.5rem; font-size: 0.95rem; }
.exp-highlights { padding-left: 1.25rem; font-size: 0.9rem; }
.exp-highlights li { margin-bottom: 0.25rem; }

/* ===== PROJECTS ===== */
.project-entry { margin-bottom: 1.75rem; padding-bottom: 1.75rem; border-bottom: 1px solid var(--border2); }
.project-entry:last-child { border-bottom: none; }
.project-header { display: flex; justify-content: space-between; align-items: baseline; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 0.4rem; }
.project-name { font-weight: 600; }
.project-links { font-size: 0.85rem; display: flex; gap: 0.75rem; }
.project-desc { font-size: 0.95rem; margin-bottom: 0.5rem; color: var(--muted); }
.project-techs { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.project-tech { font-size: 0.78rem; padding: 0.15rem 0.5rem; border: 1px solid var(--border); border-radius: 3px; color: var(--muted); }

/* ===== BLOGS ===== */
.blog-entry { margin-bottom: 1.75rem; padding-bottom: 1.75rem; border-bottom: 1px solid var(--border2); }
.blog-entry:last-child { border-bottom: none; }
.blog-header { display: flex; justify-content: space-between; align-items: baseline; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 0.35rem; }
.blog-title { font-weight: 600; font-size: 1rem; }
.blog-date { font-size: 0.85rem; color: var(--muted); }
.blog-summary { font-size: 0.95rem; color: var(--muted); margin-bottom: 0.4rem; }
.blog-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.blog-tag { font-size: 0.78rem; padding: 0.1rem 0.5rem; border: 1px solid var(--border); border-radius: 3px; color: var(--muted); }

/* ===== CONTACT ===== */
.contact-list { list-style: none; display: flex; flex-direction: column; gap: 0.6rem; font-size: 0.95rem; }
.contact-list li { display: flex; gap: 0.5rem; }
.contact-label { color: var(--muted); min-width: 80px; }

/* ===== EMPTY STATE ===== */
.empty-state { color: var(--muted); font-size: 0.9rem; padding: 2rem 0; }

/* ===== RESPONSIVE ===== */
@media (max-width: 640px) {
  .nav-toggle { display: flex; }
  .nav-links {
    display: none;
    position: fixed;
    top: 56px; left: 0; right: 0;
    background: var(--nav-bg);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 0.75rem 1rem;
    gap: 0.1rem;
  }
  .nav-links.open { display: flex; }
  .nav-link { padding: 0.6rem 0.75rem; }
  .container { padding: 2rem 1.25rem; }
  .exp-header { flex-direction: column; }
}