:root {
  --bg:      #0b0d12;
  --bg2:     #0f1117;
  --bg3:     #13161e;
  --bg4:     #181c26;
  --accent:  #00c8a0;
  --accent2: #00a882;
  --text1:   #edf0f5;
  --text2:   #7f8fa4;
  --text3:   #3d4a5c;
  --border:  rgba(255,255,255,0.06);
  --border2: rgba(0,200,160,0.18);
  --mono:    'JetBrains Mono', 'Fira Code', monospace;
  --sans:    'Inter', system-ui, sans-serif;
  --r:       6px;
}

*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text1);
  font-family: var(--sans);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { text-decoration: none; color: inherit; }
img { display: block; max-width: 100%; }

::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: #1e2736; border-radius: 2px; }

/* ── UTILITIES ── */
.container { max-width: 1100px; margin: 0 auto; padding: 0 2rem; }

.label {
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--accent);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  display: block;
  margin-bottom: 0.5rem;
}

.section-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text1);
  margin-bottom: 2.5rem;
}

.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 0;
}

/* ── NAV ── */
nav {
  position: fixed;
  inset: 0 0 auto;
  z-index: 200;
  height: 58px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  background: rgba(11,13,18,0.88);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.nav-avatar {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--border2);
}

.nav-name {
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--text1);
  letter-spacing: -0.01em;
}

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

.nav-links a {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text2);
  padding: 0.4rem 0.75rem;
  border-radius: 4px;
  transition: color 0.2s, background 0.2s;
}

.nav-links a:hover { color: var(--text1); background: rgba(255,255,255,0.05); }
.nav-links a.active { color: var(--text1); }

.nav-links .nav-sep {
  width: 1px;
  height: 16px;
  background: var(--border);
  margin: 0 0.5rem;
}

.nav-links .nav-ext { color: var(--text3); }
.nav-links .nav-ext:hover { color: var(--text2); }

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}
.nav-hamburger span { display:block; width:20px; height:1.5px; background:var(--text2); }

/* ── HERO ── */
#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 58px;
  border-bottom: 1px solid var(--border);
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 4rem;
  align-items: center;
  width: 100%;
}

.hero-label {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--accent);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 1.5rem;
}
.hero-label::before { content:''; display:inline-block; width:20px; height:1px; background:var(--accent); }

.hero-name {
  font-size: clamp(2.8rem, 6vw, 4.5rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.0;
  margin-bottom: 1rem;
}

.hero-role {
  font-family: var(--mono);
  font-size: clamp(0.85rem, 1.8vw, 1rem);
  color: var(--text2);
  margin-bottom: 1.75rem;
  min-height: 1.5em;
}

.cursor { color: var(--accent); animation: blink 1s step-end infinite; }
@keyframes blink { 50% { opacity:0; } }

.hero-bio {
  font-size: 0.95rem;
  color: var(--text2);
  max-width: 500px;
  line-height: 1.85;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.65rem 1.25rem;
  font-size: 0.82rem;
  font-weight: 600;
  border-radius: var(--r);
  transition: all 0.2s;
  cursor: pointer;
  font-family: var(--sans);
  border: none;
}
.btn svg { width:15px; height:15px; flex-shrink:0; }

.btn-solid {
  background: var(--accent);
  color: #021a14;
}
.btn-solid:hover { background: #00daa8; transform: translateY(-1px); }

.btn-ghost {
  background: transparent;
  color: var(--text2);
  border: 1px solid var(--border);
}
.btn-ghost:hover { border-color: rgba(255,255,255,0.15); color:var(--text1); transform:translateY(-1px); }

.hero-socials {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.social-link {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text3);
  letter-spacing: 0.04em;
  transition: color 0.2s;
}
.social-link svg { width:14px; height:14px; }
.social-link:hover { color: var(--text2); }

.hero-photo {
  width: 220px;
  height: 220px;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--border);
  filter: grayscale(20%);
  flex-shrink: 0;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4,1fr);
  border-top: 1px solid var(--border);
  border-left: 1px solid var(--border);
  margin-top: 4rem;
}

.stat {
  padding: 1.5rem;
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.stat-n {
  font-family: var(--mono);
  font-size: 1.9rem;
  font-weight: 800;
  color: var(--text1);
  display: block;
  line-height: 1;
  margin-bottom: 0.35rem;
}
.stat-n em { color: var(--accent); font-style:normal; }
.stat-l { font-size: 0.68rem; color: var(--text3); letter-spacing: 0.06em; text-transform:uppercase; }

/* ── SKILLS ── */
#skills { padding: 5rem 0; background: var(--bg2); border-bottom: 1px solid var(--border); }

.skills-table {
  border: 1px solid var(--border);
  border-radius: var(--r);
  overflow: hidden;
}

.skill-row {
  display: grid;
  grid-template-columns: 200px 1fr;
  border-bottom: 1px solid var(--border);
}
.skill-row:last-child { border-bottom: none; }

.skill-cat {
  padding: 1rem 1.25rem;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text2);
  background: var(--bg3);
  border-right: 1px solid var(--border);
  display: flex;
  align-items: center;
}

.skill-items {
  padding: 1rem 1.25rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  align-items: center;
}

.tag {
  font-family: var(--mono);
  font-size: 0.68rem;
  padding: 0.22rem 0.6rem;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: 3px;
  color: var(--text2);
  letter-spacing: 0.03em;
  transition: all 0.2s;
}
.tag:hover { background: rgba(0,200,160,0.07); border-color: var(--border2); color: var(--accent); }

/* ── CTF PLATFORMS ── */
#ctf { padding: 5rem 0; border-bottom: 1px solid var(--border); }

.ctf-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.ctf-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: border-color 0.2s;
}
.ctf-card:hover { border-color: var(--border2); }

.ctf-name {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text1);
}
.ctf-desc {
  font-size: 0.82rem;
  color: var(--text2);
  line-height: 1.7;
}

.ctf-badge img {
  max-width: 280px;
  border-radius: 6px;
  opacity: 0.9;
}

.ctf-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text3);
  letter-spacing: 0.04em;
  transition: color 0.2s;
  align-self: flex-start;
}
.ctf-link svg { width:12px; height:12px; }
.ctf-link:hover { color: var(--accent); }

/* ── PROJECTS ── */
#projects { padding: 5rem 0; background: var(--bg2); border-bottom: 1px solid var(--border); }

.projects-list {
  border: 1px solid var(--border);
  border-radius: var(--r);
  overflow: hidden;
}

.project-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1rem;
  padding: 1.5rem 1.75rem;
  border-bottom: 1px solid var(--border);
  transition: background 0.2s;
}
.project-row:last-child { border-bottom: none; }
.project-row:hover { background: var(--bg3); }

.project-left { display:flex; flex-direction:column; gap:0.5rem; }

.project-name { font-size: 0.9rem; font-weight:600; color:var(--text1); }
.project-desc { font-size: 0.82rem; color: var(--text2); line-height:1.7; max-width:680px; }

.project-tags { display:flex; gap:0.35rem; flex-wrap:wrap; }
.ptag {
  font-family: var(--mono);
  font-size: 0.62rem;
  padding: 0.15rem 0.5rem;
  background: rgba(0,200,160,0.07);
  border: 1px solid rgba(0,200,160,0.14);
  border-radius: 2px;
  color: var(--accent);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.project-right { display:flex; align-items:flex-start; padding-top:0.15rem; }
.gh-link {
  display:flex;
  align-items:center;
  gap:0.35rem;
  font-family:var(--mono);
  font-size:0.7rem;
  color:var(--text3);
  letter-spacing:0.04em;
  transition:color 0.2s;
}
.gh-link svg { width:14px; height:14px; }
.gh-link:hover { color:var(--text1); }

/* ── CERTS ── */
#certs { padding: 5rem 0; border-bottom: 1px solid var(--border); }

.certs-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--r);
  overflow: hidden;
}

.cert-box {
  position: relative;
  background: var(--bg);
  aspect-ratio: 4/3;
  overflow: hidden;
}

.cert-box img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease, filter 0.4s ease;
  filter: grayscale(15%);
}

.cert-box:hover img {
  transform: scale(1.06);
  filter: grayscale(0%);
}

.cert-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(11,13,18,0.95) 0%, rgba(11,13,18,0.3) 60%, transparent 100%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 1rem;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.cert-box:hover .cert-overlay { opacity: 1; }

.cert-title {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text1);
  margin-bottom: 0.2rem;
  line-height: 1.3;
}

.cert-sub {
  font-size: 0.68rem;
  color: var(--text2);
  margin-bottom: 0.6rem;
  line-height: 1.4;
}

.cert-verify {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-family: var(--mono);
  font-size: 0.65rem;
  color: var(--accent);
  letter-spacing: 0.06em;
  transition: color 0.2s;
  align-self: flex-start;
}
.cert-verify svg { width:11px; height:11px; }
.cert-verify:hover { color: #00daa8; }

/* ── EXPERIENCE ── */
#experience { padding: 5rem 0; background: var(--bg2); border-bottom: 1px solid var(--border); }

.exp-list {
  border: 1px solid var(--border);
  border-radius: var(--r);
  overflow: hidden;
}

.exp-row {
  display: grid;
  grid-template-columns: 150px 1fr;
  border-bottom: 1px solid var(--border);
  transition: background 0.2s;
}
.exp-row:last-child { border-bottom: none; }
.exp-row:hover { background: var(--bg3); }

.exp-period {
  padding: 1.5rem 1.25rem;
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--text3);
  letter-spacing: 0.04em;
  border-right: 1px solid var(--border);
  display: flex;
  align-items: flex-start;
  padding-top: 1.75rem;
}

.exp-body { padding: 1.5rem 1.75rem; }
.exp-role { font-size:0.88rem; font-weight:600; color:var(--text1); margin-bottom:0.15rem; }
.exp-company { font-family:var(--mono); font-size:0.72rem; color:var(--accent); margin-bottom:0.5rem; letter-spacing:0.03em; }
.exp-desc { font-size:0.8rem; color:var(--text3); line-height:1.7; }

/* ── CONTACT ── */
#contact { padding: 5rem 0; }

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.contact-bio {
  font-size: 0.9rem;
  color: var(--text2);
  line-height: 1.85;
  margin-bottom: 2rem;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 2rem;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 0.82rem;
  color: var(--text2);
  transition: color 0.2s;
}
.contact-item:hover { color: var(--text1); }
.contact-item svg { width:15px; height:15px; color:var(--text3); flex-shrink:0; }

.langs {
  display: flex;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--r);
  overflow: hidden;
}
.lang-cell { flex:1; padding:0.9rem 1rem; background:var(--bg); text-align:center; }
.lang-name { font-size:0.82rem; font-weight:600; color:var(--text1); margin-bottom:0.15rem; }
.lang-lvl { font-family:var(--mono); font-size:0.65rem; color:var(--text3); text-transform:uppercase; letter-spacing:0.08em; }

/* contact form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; }

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--r);
  color: var(--text1);
  font-size: 0.82rem;
  font-family: var(--sans);
  transition: border-color 0.2s;
  outline: none;
  resize: none;
}
.contact-form input::placeholder,
.contact-form textarea::placeholder { color: var(--text3); }
.contact-form input:focus,
.contact-form textarea:focus { border-color: var(--border2); }

.contact-form textarea { min-height: 130px; }

.captcha-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 1rem;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--r);
}
.captcha-q { font-family: var(--mono); font-size: 0.82rem; color: var(--text2); flex: 1; }
.captcha-row input { max-width: 120px; text-align: center; }

/* ── FOOTER ── */
footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.foot-copy { font-family:var(--mono); font-size:0.68rem; color:var(--text3); letter-spacing:0.04em; }

.foot-links { display:flex; gap:1.25rem; }
.foot-link { font-family:var(--mono); font-size:0.68rem; color:var(--text3); letter-spacing:0.04em; transition:color 0.2s; }
.foot-link:hover { color:var(--text2); }

/* ── FADE ── */
.fade { opacity:0; transform:translateY(14px); transition:opacity 0.5s ease,transform 0.5s ease; }
.fade.in { opacity:1; transform:none; }

/* ── RESPONSIVE ── */
@media (max-width: 920px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-photo { display:none; }
  .certs-grid { grid-template-columns: repeat(3,1fr); }
  .contact-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .hero-stats { grid-template-columns: repeat(2,1fr); }
}

@media (max-width: 700px) {
  .nav-links { display:none; }
  .nav-links.open {
    display:flex; flex-direction:column;
    position:absolute; top:58px; left:0; right:0;
    background:rgba(11,13,18,0.98);
    border-bottom:1px solid var(--border);
    padding:1.25rem 2rem; gap:1rem;
  }
  .nav-hamburger { display:flex; }
  .certs-grid { grid-template-columns: repeat(2,1fr); }
  .skill-row { grid-template-columns:1fr; }
  .skill-cat { border-right:none; border-bottom:1px solid var(--border); }
  .exp-row { grid-template-columns:1fr; }
  .exp-period { border-right:none; border-bottom:1px solid var(--border); padding:1rem 1.25rem; }
  .form-row { grid-template-columns:1fr; }
  .ctf-grid { grid-template-columns:1fr; }
  footer { flex-direction:column; text-align:center; }
}

@media (max-width: 480px) {
  .certs-grid { grid-template-columns: 1fr 1fr; }
  .hero-stats { grid-template-columns: repeat(2,1fr); }
}