/* ── Custom Properties ─────────────────────────────────────── */
:root {
  --color-bg:      #FFFFFF;
  --color-surface: #F6F7FA;
  --color-border:  #E2E4EB;
  --color-text:    #1A1A2E;
  --color-muted:   #6B7084;
  --color-accent:  #2563EB;
  --color-success: #00C48C;
  --color-warning: #F0A030;
  --color-error:   #EF4460;
  --color-link:    #2D9CDB;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --transition: 0.2s ease;
  --radius: 6px;
}

/* ── Reset / Base ─────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
}
a { color: var(--color-link); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-accent); }
img { max-width: 100%; display: block; }

/* ── Navigation ───────────────────────────────────────────── */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: background var(--transition), border-color var(--transition);
}
.nav-container {
  max-width: 1100px; margin: 0 auto; padding: 0.85rem 1.5rem;
  display: flex; align-items: center; justify-content: space-between;
}
.nav-brand {
  display: flex; align-items: center; gap: 0.45rem;
  font-weight: 700; font-size: 1.05rem; color: var(--color-text);
  text-decoration: none;
}
.nav-brand:hover { color: var(--color-accent); }
.nav-brand-icon {
  display: flex; align-items: center; justify-content: center;
  color: var(--color-muted);
  transition: color var(--transition);
}
.nav-brand:hover .nav-brand-icon { color: var(--color-accent); }
.nav-brand-initials { letter-spacing: 0.04em; }
.nav-links { list-style: none; display: flex; gap: 2rem; }
.nav-links a { color: var(--color-muted); font-size: 0.9rem; transition: color var(--transition); }
.nav-links a:hover { color: var(--color-accent); }
.nav-end { display: flex; align-items: center; gap: 0.75rem; }
.nav-hamburger {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 0.35rem;
}
.nav-hamburger span {
  width: 22px; height: 2px;
  background: var(--color-text); display: block; border-radius: 2px;
  transition: var(--transition);
}
.theme-toggle {
  display: flex; align-items: center; justify-content: center;
  width: 34px; height: 34px;
  background: none; border: 1px solid var(--color-border);
  border-radius: var(--radius); cursor: pointer;
  color: var(--color-muted);
  transition: color var(--transition), border-color var(--transition), background var(--transition);
}
.theme-toggle:hover { color: var(--color-accent); border-color: var(--color-accent); }
.icon-sun { display: none; }
.icon-moon { display: block; }
.nav-connect {
  display: inline-block;
  padding: 0.45rem 1.1rem;
  background: var(--color-accent);
  color: #fff !important;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius);
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.35);
}
.nav-connect:hover {
  background: #1D4ED8 !important;
  color: #fff !important;
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.45);
}

/* ── Hero ─────────────────────────────────────────────────── */
.hero {
  min-height: 100vh; display: flex; align-items: center;
  flex-direction: row; gap: 3rem;
  padding: 6rem 1.5rem 4rem;
  max-width: 1100px; margin: 0 auto;
  animation: fadeInUp 0.7s ease both;
}
.hero-content { flex: 0 0 55%; }
.hero-greeting { color: var(--color-accent); font-size: 1rem; font-weight: 600; margin-bottom: 0.5rem; }
.hero-name {
  font-size: clamp(2.75rem, 7vw, 5rem);
  font-weight: 700; line-height: 1.1; margin-bottom: 1rem;
}
.hero-tagline { font-size: 1.2rem; color: var(--color-muted); margin-bottom: 2.25rem; max-width: 560px; }
.hero-photo-wrapper {
  flex: 0 0 45%; display: flex; align-items: center; justify-content: center;
}
.hero-photo-frame { position: relative; width: 336px; height: 396px; }
.hero-photo-accent {
  position: absolute; top: 16px; left: 16px;
  width: 320px; height: 380px;
  border-radius: 16px;
  background: rgba(37, 99, 235, 0.15);
}
.hero-photo-card {
  position: absolute; top: 0; left: 0;
  width: 320px; height: 380px;
  border-radius: 16px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.12);
  overflow: hidden;
  transition: transform 0.3s ease;
  z-index: 1;
}
.hero-photo-card:hover { transform: translateY(-6px); }
.hero-photo-img { width: 100%; height: 100%; object-fit: cover; display: block; }
.hero-socials { display: flex; gap: 0.75rem; margin-top: 2rem; }
.hero-social-link {
  display: flex; align-items: center; justify-content: center;
  width: 40px; height: 40px;
  border: 1px solid var(--color-border); border-radius: var(--radius);
  color: var(--color-muted);
  transition: color var(--transition), border-color var(--transition);
}
.hero-social-link:hover { color: var(--color-accent); border-color: var(--color-accent); }
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: none; }
}

/* ── Buttons ──────────────────────────────────────────────── */
.btn {
  display: inline-block; padding: 0.75rem 1.75rem;
  border-radius: var(--radius); font-weight: 600;
  transition: background var(--transition), transform var(--transition);
  cursor: pointer; border: none; font-size: 1rem; font-family: var(--font);
}
.btn-primary { background: var(--color-accent); color: #fff; }
.btn-primary:hover { background: #1D4ED8; color: #fff; transform: translateY(-1px); }

/* ── Section Layout ───────────────────────────────────────── */
section { padding: 5rem 1.5rem; max-width: 1100px; margin: 0 auto; }
.contact-section { max-width: 100%; padding: 0; border-top: 1px solid var(--color-border); }
.contact-inner { max-width: 1100px; margin: 0 auto; padding: 5rem 1.5rem; }
.section-title { font-size: 1.9rem; font-weight: 700; margin-bottom: 0.5rem; }
.section-title::after {
  content: ''; display: block; width: 2.75rem; height: 3px;
  background: var(--color-accent); margin-top: 0.5rem; border-radius: 2px;
}
.section-title { margin-bottom: 2.25rem; }
.empty-state { color: var(--color-muted); }

/* ── About ────────────────────────────────────────────────── */
.about-inner { }
.about-bio { color: var(--color-muted); max-width: 680px; margin-bottom: 0.75rem; font-size: 1.05rem; }
.about-meta { color: var(--color-muted); font-size: 0.9rem; margin-bottom: 1.75rem; }
.available { color: var(--color-success); font-weight: 600; }
.skills { display: flex; flex-direction: column; gap: 0.6rem; }
.skill-group { display: flex; align-items: center; gap: 0.75rem; flex-wrap: wrap; }
.skill-category {
  font-size: 0.7rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--color-muted); min-width: 5.5rem; flex-shrink: 0;
}
.skill-badges { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.skill-badge {
  background: var(--color-surface); color: var(--color-accent);
  border: 1px solid var(--color-border);
  padding: 0.3rem 0.9rem; border-radius: 99px; font-size: 0.8rem; font-weight: 600;
}

/* ── Timeline ─────────────────────────────────────────────── */
.timeline-heading {
  font-size: 1.1rem; font-weight: 700; color: var(--color-muted);
  text-transform: uppercase; letter-spacing: 0.08em;
  margin-top: 2.75rem; margin-bottom: 1.75rem;
}
.timeline { position: relative; padding-left: 0; }
.timeline::before {
  content: ''; position: absolute;
  left: 19px; top: 6px; bottom: 6px; width: 2px;
  background: var(--color-border);
  border-radius: 2px;
}
.timeline-item {
  display: flex; gap: 1.25rem;
  margin-bottom: 2.25rem; position: relative;
}
.timeline-item:last-child { margin-bottom: 0; }
.timeline-dot {
  flex-shrink: 0; width: 40px; height: 40px;
  border-radius: 50%; background: var(--color-surface);
  border: 2px solid var(--color-border);
  display: flex; align-items: center; justify-content: center;
  color: var(--color-accent); z-index: 1;
}
.timeline-dot--education {
  border-color: rgba(45, 156, 219, 0.5);
  color: var(--color-link);
}
.timeline-content { padding-top: 0.5rem; }
.timeline-role { font-size: 1rem; font-weight: 700; margin-bottom: 0.2rem; }
.timeline-logo { height: 24px; width: auto; display: inline-block; vertical-align: middle; margin-right: 0.5rem; border-radius: 3px; }
.timeline-company {
  display: inline-flex; align-items: center;
  color: var(--color-link); font-size: 0.88rem; font-weight: 600;
  transition: color var(--transition);
}
.timeline-company:hover { color: var(--color-accent); }
.timeline-company-plain { display: inline-flex; align-items: center; color: var(--color-link); font-size: 0.88rem; font-weight: 600; }
.timeline-dates { color: var(--color-muted); font-size: 0.8rem; margin-top: 0.2rem; margin-bottom: 0.6rem; }
.timeline-desc { list-style: none; display: flex; flex-direction: column; gap: 0.2rem; }
.timeline-desc li { color: var(--color-muted); font-size: 0.875rem; padding-left: 1rem; position: relative; }
.timeline-desc li::before {
  content: '·'; position: absolute; left: 0;
  color: var(--color-accent); font-weight: 700;
}

/* ── Projects ─────────────────────────────────────────────── */
.projects-inner { }
.projects-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
.project-card {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius); padding: 1.5rem;
  display: flex; flex-direction: column;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}
.project-card:hover { transform: translateY(-4px); border-color: var(--color-accent); box-shadow: 0 8px 24px rgba(37,99,235,0.1); }
.project-title { font-size: 1.1rem; font-weight: 700; margin-bottom: 0.5rem; }
.project-description { color: var(--color-muted); font-size: 0.9rem; margin-bottom: 1rem; flex: 1; }
.project-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 1rem; }
.tag {
  background: rgba(37, 99, 235, 0.08); color: var(--color-accent);
  padding: 0.2rem 0.6rem; border-radius: 4px; font-size: 0.78rem;
}
.project-link { color: var(--color-link); font-weight: 600; font-size: 0.88rem; align-self: flex-start; }
.project-link:hover { color: var(--color-accent); }

/* ── Interests ────────────────────────────────────────────── */
.interests-inner { }
.interests-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; }
.interest-card {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius); padding: 1.25rem;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.interest-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.12);
}
.interest-emoji { font-size: 1.75rem; display: block; margin-bottom: 0.6rem; }
.interest-label { font-size: 1rem; font-weight: 600; margin-bottom: 0.35rem; }
.interest-description { color: var(--color-muted); font-size: 0.85rem; }

/* ── Contact ──────────────────────────────────────────────── */
.contact-links { display: flex; gap: 0.75rem; margin-bottom: 2.5rem; flex-wrap: wrap; }
.contact-link {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.6rem 1.2rem; border: 1px solid var(--color-border);
  border-radius: var(--radius); color: var(--color-muted);
  font-weight: 600; font-size: 0.9rem;
  transition: border-color var(--transition), color var(--transition);
}
.contact-link:hover { border-color: var(--color-accent); color: var(--color-accent); }
.contact-form { display: flex; flex-direction: column; gap: 0.875rem; max-width: 520px; }
.contact-form input,
.contact-form textarea {
  background: var(--color-bg); border: 1px solid var(--color-border);
  border-radius: var(--radius); padding: 0.75rem 1rem;
  color: var(--color-text); font-family: var(--font); font-size: 1rem;
  outline: none; transition: border-color var(--transition);
}
.contact-form input:focus,
.contact-form textarea:focus { border-color: var(--color-accent); }
.contact-form textarea { min-height: 120px; resize: vertical; }
.contact-success { color: var(--color-success); font-weight: 600; padding: 1.25rem 0; }

/* ── Footer ───────────────────────────────────────────────── */
.footer {
  text-align: center; padding: 2rem 1.5rem;
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-muted); font-size: 0.85rem;
}

/* ── HTMX Loading States ──────────────────────────────────── */
.loading {
  display: flex; align-items: center; justify-content: center;
  padding: 3rem; color: var(--color-muted); font-size: 0.9rem;
}
.htmx-indicator { opacity: 0; transition: opacity var(--transition); }
.htmx-request .htmx-indicator { opacity: 1; }

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 768px) {
  .nav-hamburger { display: flex; }
  .nav-links {
    display: none; position: absolute; top: 100%; left: 0; right: 0;
    background: var(--color-bg); flex-direction: column;
    padding: 1rem 1.5rem; gap: 1rem;
    border-bottom: 1px solid var(--color-border);
  }
  .nav-links.open { display: flex; }
  .projects-grid { grid-template-columns: 1fr; }
  .interests-grid { grid-template-columns: repeat(2, 1fr); }
  .hero { flex-direction: column-reverse; gap: 2rem; align-items: center; }
  .hero-content { flex: none; }
  .hero-photo-frame { width: 276px; height: 316px; }
  .hero-photo-accent { width: 260px; height: 300px; }
  .hero-photo-card { width: 260px; height: 300px; }
}
@media (max-width: 480px) {
  .interests-grid { grid-template-columns: 1fr; }
  .hero-name { font-size: 2.5rem; }
}

/* ── Dark Mode ─────────────────────────────────────────────── */
[data-theme="dark"] {
  --color-bg:      #0D1117;
  --color-surface: #161B22;
  --color-border:  #30363D;
  --color-text:    #E6EDF3;
  --color-muted:   #8B949E;
  --color-accent:  #3B82F6;
  --color-link:    #60A5FA;
}
[data-theme="dark"] .nav {
  background: rgba(13, 17, 23, 0.85);
}
[data-theme="dark"] .icon-sun  { display: block; }
[data-theme="dark"] .icon-moon { display: none; }