/* ════════════════════════════════════════════════
   Bibek Khanal Portfolio — style.css
   Palette: off-white / dark ink / teal accent
   Fonts: Syne (headings) · DM Sans (body) · JetBrains Mono (labels)
   ════════════════════════════════════════════════ */

/* ── CSS Variables ────────────────────────────── */
:root {
  --bg:        #f8f7f4;
  --bg2:       #f0ede6;
  --ink:       #0e0e0e;
  --ink2:      #3a3a3a;
  --teal:      #0d9488;
  --teal-lgt:  #14b8a6;
  --teal-dim:  #ccfbf1;
  --card:      #ffffff;
  --border:    #e2ddd4;

  --font-head: 'Syne', sans-serif;
  --font-body: 'DM Sans', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

/* ── Reset ────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
}

/* ════════════════════════════════════════════════
   NAV
   ════════════════════════════════════════════════ */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(248, 247, 244, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 clamp(1.5rem, 5vw, 4rem);
  height: 64px;
}
.nav-logo {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: -0.03em;
  color: var(--ink);
  text-decoration: none;
}
.nav-logo span { color: var(--teal); }

.nav-links {
  display: flex;
  gap: 2.2rem;
  list-style: none;
}
.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.73rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink2);
  text-decoration: none;
  transition: color 0.2s;
}
.nav-links a:hover,
.nav-links a.active { color: var(--teal); }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 24px; height: 2px;
  background: var(--ink);
  transition: all 0.3s;
}

/* Mobile menu */
.mobile-menu {
  display: none;
  position: fixed; top: 64px; left: 0; right: 0;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  padding: 1.5rem clamp(1.5rem, 5vw, 4rem);
  flex-direction: column;
  gap: 1.2rem;
  z-index: 99;
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink2);
  text-decoration: none;
  transition: color 0.2s;
}
.mobile-menu a:hover { color: var(--teal); }

/* ── Profile Photo (Double Size) ───────────────────────────── */
.profile-photo {
  width: 320px;
  height: 320px;
  border-radius: 50%;
  overflow: hidden;
  border: 4px solid var(--teal);
  margin-bottom: 1.8rem;
  box-shadow: 0 0 0 16px var(--teal-dim);
}

.profile-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  display: block;
}

/* On mobile, center the photo */
@media (max-width: 900px) {
  .profile-photo {
    margin-left: auto;
    margin-right: auto;
  }
}


/* ════════════════════════════════════════════════
   HERO
   ════════════════════════════════════════════════ */
.hero {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  padding: 100px clamp(1.5rem, 5vw, 4rem) 4rem;
  gap: 3rem;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute; top: -20%; right: -10%;
  width: 600px; height: 600px;
  background: radial-gradient(ellipse, rgba(20, 184, 166, 0.12) 0%, transparent 70%);
  pointer-events: none;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.6rem; /* decreased */
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--teal);
  background: var(--teal-dim);
  padding: 0.35rem 0.85rem;
  border-radius: 2px;
  margin-bottom: 1.5rem;
  border-left: 3px solid var(--teal);
}

.hero h1 {
  font-family: var(--font-head);
  font-size: clamp(2.2rem, 5vw, 4rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--ink);
  margin-bottom: 1.5rem;
}

.hero h1 em {
  font-style: normal;
  color: var(--teal);
}
/* Secondary role tag — sits between h1 and hero-sub */
.hero-role-tag {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink2);
  border: 1.5px solid var(--border);
  border-radius: 2px;
  padding: 0.3rem 0.85rem;
  margin-bottom: 1.5rem;
  margin-top: -0.65rem;
}

.hero-sub {
  font-size: 1.1rem;
  color: var(--ink2);
  max-width: 440px;
  margin-bottom: 2.5rem;
  font-weight: 400;
  line-height: 1.75;
}

.hero-btns {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* Hero visual */
.hero-visual {
  display: flex;
  align-items: center;
  justify-content: center;
}
.circuit-box {
  width: min(420px, 90vw);
  height: min(420px, 90vw);
}
.circuit-box svg { width: 100%; height: 100%; }

/* ════════════════════════════════════════════════
   BUTTONS
   ════════════════════════════════════════════════ */
.btn-primary {
  display: inline-block;
  background: var(--teal);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.85rem 1.8rem;
  border: none; border-radius: 2px;
  text-decoration: none; cursor: pointer;
  transition: background 0.2s, transform 0.15s;
}
.btn-primary:hover { background: #0b8277; transform: translateY(-2px); }

.btn-outline {
  display: inline-block;
  background: transparent;
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.85rem 1.8rem;
  border: 1.5px solid var(--ink);
  border-radius: 2px;
  text-decoration: none; cursor: pointer;
  transition: border-color 0.2s, color 0.2s, transform 0.15s;
}
.btn-outline:hover { border-color: var(--teal); color: var(--teal); transform: translateY(-2px); }

/* ════════════════════════════════════════════════
   SECTION BASE
   ════════════════════════════════════════════════ */
section { padding: 5rem clamp(1.5rem, 5vw, 4rem); }

.section-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 0.6rem;
}
.section-title {
  font-family: var(--font-head);
  font-size: clamp(1.9rem, 4vw, 2.8rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--ink);
  margin-bottom: 1rem;
}
.section-line {
  width: 48px; height: 3px;
  background: var(--teal);
  margin-bottom: 3rem;
}

/* ════════════════════════════════════════════════
   SKILLS
   ════════════════════════════════════════════════ */
#skills { background: var(--bg2); }

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
}
.skill-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1.8rem;
  transition: border-color 0.25s, transform 0.2s, box-shadow 0.2s;
}
.skill-card:hover {
  border-color: var(--teal);
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(13, 148, 136, 0.1);
}
.skill-icon {
  width: 44px; height: 44px;
  background: var(--teal-dim);
  border-radius: 6px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 1.1rem;
  font-size: 1.4rem;
  color: var(--teal);
}
.skill-icon svg { width: 24px; height: 24px; }
.skill-card h3 {
  font-family: var(--font-head);
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 0.85rem;
  color: var(--ink);
  letter-spacing: -0.02em;
}
.skill-tags { display: flex; flex-wrap: wrap; gap: 0.45rem; }
.tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.04em;
  color: var(--ink2);
  background: var(--bg2);
  padding: 0.25rem 0.6rem;
  border-radius: 2px;
  border: 1px solid var(--border);
}

/* ════════════════════════════════════════════════
   PROJECTS
   ════════════════════════════════════════════════ */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}
.project-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
  transition: border-color 0.25s, transform 0.2s, box-shadow 0.2s;
}
.project-card:hover {
  border-color: var(--teal);
  transform: translateY(-5px);
  box-shadow: 0 16px 36px rgba(13, 148, 136, 0.12);
}
.project-thumb {
  height: 200px;
  display: flex; align-items: center; justify-content: center;
  font-size: 4rem;
  position: relative;
  overflow: hidden;
}
.project-thumb::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(to bottom, transparent 40%, rgba(0, 0, 0, 0.06));
}
.project-body { padding: 1.8rem; }
.project-badge {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 0.6rem;
}
.project-card h3 {
  font-family: var(--font-head);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 0.8rem;
}
.project-card p {
  font-size: 0.9rem;
  color: var(--ink2);
  line-height: 1.7;
  margin-bottom: 1.2rem;
}
.project-tech { display: flex; flex-wrap: wrap; gap: 0.4rem; }

/* ════════════════════════════════════════════════
   EXPERIENCE
   ════════════════════════════════════════════════ */
#experience { background: var(--bg2); }

.exp-list {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
  max-width: 760px;
}
.exp-item {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 2rem;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid var(--border);
}
.exp-item:last-child { border-bottom: none; padding-bottom: 0; }

.exp-period {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--teal);
  padding-top: 0.25rem;
}
.exp-content h3 {
  font-family: var(--font-head);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 0.25rem;
}
.exp-org {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--teal);
  font-weight: 500;
  margin-bottom: 0.75rem;
}
.exp-content ul {
  padding-left: 1.1rem;
  color: var(--ink2);
  font-size: 0.9rem;
  line-height: 1.8;
}
.exp-content ul li::marker { color: var(--teal); }

/* ════════════════════════════════════════════════
   EDUCATION
   ════════════════════════════════════════════════ */
.edu-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-left: 4px solid var(--teal);
  padding: 2rem 2.2rem;
  border-radius: 0 4px 4px 0;
  max-width: 620px;
}
.edu-degree {
  font-family: var(--font-head);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 0.35rem;
}
.edu-school {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--teal);
  margin-bottom: 0.3rem;
  letter-spacing: 0.04em;
}
.edu-school.muted { color: var(--ink2); }
.edu-year {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink2);
  margin-top: 0.5rem;
}

/* ════════════════════════════════════════════════
   CONTACT
   ════════════════════════════════════════════════ */
#contact { background: var(--bg2); }

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 4rem;
  max-width: 900px;
}
.contact-info h3 {
  font-family: var(--font-head);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.04em;
  margin-bottom: 1rem;
  line-height: 1.3;
}
.contact-info p {
  font-size: 0.95rem;
  color: var(--ink2);
  line-height: 1.8;
  margin-bottom: 2rem;
}
.contact-link {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink2);
  text-decoration: none;
  margin-bottom: 0.85rem;
  transition: color 0.2s;
}
.contact-link:hover { color: var(--teal); }

.contact-link-icon {
  width: 32px; height: 32px;
  background: var(--teal-dim);
  border-radius: 2px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  color: var(--teal);
}
.contact-link-icon svg {
  width: 16px;
  height: 16px;
  display: block;
}

/* Form */
.contact-form { display: flex; flex-direction: column; gap: 1rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.form-group { display: flex; flex-direction: column; gap: 0.4rem; }
.form-group label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink2);
}
.form-group input,
.form-group textarea {
  background: var(--card);
  border: 1.5px solid var(--border);
  border-radius: 2px;
  padding: 0.75rem 1rem;
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--ink);
  outline: none;
  transition: border-color 0.2s;
  resize: none;
}
.form-group input:focus,
.form-group textarea:focus { border-color: var(--teal); }
.form-group textarea { min-height: 120px; }

.form-submit { align-self: flex-start; margin-top: 0.5rem; }
.form-success {
  display: none;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--teal);
  letter-spacing: 0.05em;
  margin-top: 0.5rem;
}
/* ════════════════════════════════════════════════
   CERTIFICATIONS
   ════════════════════════════════════════════════ */
#certifications { background: var(--bg); }

.cert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.75rem;
}

.cert-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color 0.25s, transform 0.2s, box-shadow 0.2s;
}
.cert-card:hover {
  border-color: var(--teal);
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(13, 148, 136, 0.1);
}

.cert-thumb {
  width: 100%;
  height: 180px;
  overflow: hidden;
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
}
.cert-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  display: block;
  transition: transform 0.35s ease;
}
.cert-card:hover .cert-thumb img { transform: scale(1.04); }

.cert-thumb-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--bg2), var(--teal-dim));
}
.cert-thumb-placeholder svg {
  width: 56px;
  height: 56px;
  color: var(--teal);
  opacity: 0.7;
}

.cert-body {
  padding: 1.4rem 1.5rem 1.5rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.cert-category {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 0.5rem;
  display: block;
}
.cert-title {
  font-family: var(--font-head);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin-bottom: 0.35rem;
  line-height: 1.35;
}
.cert-issuer {
  font-size: 0.82rem;
  color: var(--ink2);
  margin-bottom: 1.1rem;
  flex: 1;
  line-height: 1.5;
}

.cert-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  border-top: 1px solid var(--border);
  padding-top: 0.9rem;
  margin-top: auto;
}
.cert-year {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink2);
  letter-spacing: 0.06em;
}

.cert-link {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--teal);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s, gap 0.2s;
}
.cert-link svg {
  width: 11px;
  height: 11px;
  flex-shrink: 0;
  transition: transform 0.2s;
}
.cert-link:hover { color: #0b8277; gap: 0.45rem; }
.cert-link:hover svg { transform: translate(1px, -1px); }

.cert-link--offline {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink2);
  background: var(--bg2);
  border: 1px solid var(--border);
  padding: 0.2rem 0.55rem;
  border-radius: 2px;
}
/* ════════════════════════════════════════════════
   FOOTER
   ════════════════════════════════════════════════ */
footer {
  padding: 2.5rem clamp(1.5rem, 5vw, 4rem);
  border-top: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 1rem;
}
footer p {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink2);
  letter-spacing: 0.04em;
}
.footer-links { display: flex; gap: 1.5rem; }
.footer-links a {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink2);
  text-decoration: none;
  transition: color 0.2s;
}
.footer-links a:hover { color: var(--teal); }

/* ════════════════════════════════════════════════
   SCROLL REVEAL
   ════════════════════════════════════════════════ */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible {
  opacity: 1;
  transform: none;
}

/* ════════════════════════════════════════════════
   RESPONSIVE
   ════════════════════════════════════════════════ */
@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    text-align: center;
    padding-top: 100px;
  }
  .hero-sub { margin: 0 auto 2.5rem; }
  .hero-btns { justify-content: center; }
  .hero-role-tag { margin-left: auto; margin-right: auto; }
  .hero-visual { display: none; }

  .nav-links { display: none; }
  .hamburger { display: flex; }

  .contact-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .exp-item { grid-template-columns: 1fr; gap: 0.3rem; }
  .form-row { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  .hero h1 { font-size: 2.4rem; }
  .hero-btns { flex-direction: column; align-items: center; }
  .btn-primary, .btn-outline { width: 100%; text-align: center; }
}