/* ============================================================
   Mohammad Kaif — Portfolio
   Dark, modern security-researcher aesthetic
   ============================================================ */

:root {
  --bg: #0a0e14;
  --bg-soft: #0e141d;
  --card: #111927;
  --border: #1e2a3a;
  --text: #d7e0ea;
  --text-dim: #8494a7;
  --accent: #34d399;
  --accent-soft: rgba(52, 211, 153, 0.12);
  --accent-2: #22d3ee;
  --font-sans: "Space Grotesk", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, monospace;
  --radius: 14px;
  --maxw: 1080px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 90px; }

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

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 1.5rem; }
.mono { font-family: var(--font-mono); }
.accent { color: var(--accent); }
.dim { color: var(--text-dim); }

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-2); }

/* ---------- backgrounds ---------- */
.bg-grid {
  position: fixed; inset: 0; z-index: -2; pointer-events: none;
  background-image:
    linear-gradient(rgba(52, 211, 153, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(52, 211, 153, 0.045) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, #000 40%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, #000 40%, transparent 100%);
}
.bg-glow {
  position: fixed; z-index: -1; pointer-events: none;
  top: -220px; left: 50%; transform: translateX(-50%);
  width: 780px; height: 520px;
  background: radial-gradient(closest-side, rgba(52, 211, 153, 0.14), transparent);
  filter: blur(40px);
}

/* ---------- nav ---------- */
.nav-wrap {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  backdrop-filter: blur(12px);
  background: rgba(10, 14, 20, 0.75);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s;
}
.nav-wrap.scrolled { border-bottom-color: var(--border); }

.nav {
  display: flex; align-items: center; justify-content: space-between;
  height: 68px;
}
.logo { font-weight: 600; font-size: 1.05rem; color: var(--text); }
.logo:hover { color: var(--accent); }

.nav-links {
  display: flex; align-items: center; gap: 1.75rem; list-style: none;
}
.nav-links a:not(.btn) {
  color: var(--text-dim); font-size: 0.92rem; font-weight: 500;
  transition: color 0.2s;
}
.nav-links a:not(.btn):hover,
.nav-links a.active:not(.btn) { color: var(--accent); }

.nav-toggle { display: none; }

/* ---------- buttons ---------- */
.btn {
  display: inline-block;
  font-family: var(--font-mono); font-size: 0.9rem; font-weight: 500;
  padding: 0.7rem 1.4rem; border-radius: 10px;
  border: 1px solid var(--accent);
  transition: all 0.2s ease;
  cursor: pointer;
}
.btn-solid { background: var(--accent); color: #06281c; }
.btn-solid:hover { background: var(--accent-2); border-color: var(--accent-2); color: #062a30; transform: translateY(-2px); }
.btn-outline { color: var(--accent); background: transparent; }
.btn-outline:hover { background: var(--accent-soft); color: var(--accent); transform: translateY(-2px); }
.btn-sm { padding: 0.45rem 1rem; font-size: 0.82rem; }
.btn-lg { padding: 0.9rem 2.2rem; font-size: 1rem; }

/* ---------- hero ---------- */
.hero {
  min-height: 100svh;
  display: flex; flex-direction: column; justify-content: center;
  padding-top: 90px; padding-bottom: 3rem;
}
.kicker { color: var(--accent); font-size: 0.95rem; margin-bottom: 1.2rem; }
.prompt { color: var(--text-dim); margin-right: 0.5rem; }
.cursor { animation: blink 1.1s steps(1) infinite; margin-left: 2px; }
@keyframes blink { 50% { opacity: 0; } }

.hero h1 {
  font-size: clamp(2.6rem, 7vw, 4.6rem);
  font-weight: 700; letter-spacing: -0.02em; line-height: 1.05;
}
.hero-sub {
  font-size: clamp(1.3rem, 3.5vw, 2rem);
  font-weight: 500; color: var(--text-dim); margin-top: 0.6rem;
}
.hero-tags { display: flex; gap: 0.6rem; flex-wrap: wrap; margin-top: 1.4rem; }
.tag {
  font-size: 0.78rem; padding: 0.25rem 0.7rem;
  border: 1px solid var(--border); border-radius: 999px;
  color: var(--accent); background: var(--accent-soft);
}
.hero-desc { max-width: 560px; color: var(--text-dim); margin-top: 1.5rem; font-size: 1.05rem; }
.hero-desc strong { color: var(--text); }
.hero-cta { display: flex; gap: 1rem; flex-wrap: wrap; margin-top: 2.2rem; }

.socials {
  display: flex; gap: 0.6rem; list-style: none; margin-top: 2.6rem;
}
.socials a {
  display: grid; place-items: center;
  width: 42px; height: 42px; border-radius: 10px;
  border: 1px solid var(--border); color: var(--text-dim);
  transition: all 0.2s;
}
.socials a:hover {
  color: var(--accent); border-color: var(--accent);
  transform: translateY(-3px); background: var(--accent-soft);
}

/* ---------- sections ---------- */
.section { padding: 5.5rem 1.5rem; }
.section-title {
  font-size: clamp(1.5rem, 3vw, 1.9rem); font-weight: 600;
  margin-bottom: 2.5rem; display: flex; align-items: baseline; gap: 0.7rem;
}
.section-num { font-size: 0.95em; font-weight: 500; }
.section-title::after {
  content: ""; flex: 1; height: 1px; background: var(--border); margin-left: 1rem;
}

/* ---------- about ---------- */
.about-grid {
  display: grid; grid-template-columns: 1.4fr 1fr; gap: 2.5rem; align-items: start;
}
.about-text p { color: var(--text-dim); margin-bottom: 1.1rem; }
.about-text strong { color: var(--text); }

.terminal {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.4rem 1.5rem;
  font-size: 0.86rem; line-height: 1.9; overflow-x: auto;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
}
.t-dim { color: var(--text-dim); }
.t-key { color: var(--accent-2); }
.t-ok { color: var(--accent); }

/* ---------- stats ---------- */
.stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.2rem;
  margin-top: 2.5rem;
}
.stat {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.3rem 1rem; text-align: center;
}
.stat-num {
  display: block; font-family: var(--font-mono); font-weight: 600;
  font-size: 1.7rem; color: var(--accent); line-height: 1.1;
}
.stat-label { display: block; color: var(--text-dim); font-size: 0.82rem; margin-top: 0.4rem; }

/* ---------- timeline ---------- */
.timeline { position: relative; display: flex; flex-direction: column; gap: 1.4rem; }
.tl-item {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.6rem 1.8rem;
  border-left: 3px solid var(--accent);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.tl-item:hover { transform: translateX(4px); box-shadow: 0 12px 34px rgba(0,0,0,0.35); }
.tl-head {
  display: flex; align-items: baseline; justify-content: space-between;
  gap: 1rem; flex-wrap: wrap;
}
.tl-head h4 { font-size: 1.12rem; font-weight: 600; }
.tl-date {
  font-size: 0.8rem; color: var(--accent);
  background: var(--accent-soft); padding: 0.2rem 0.7rem; border-radius: 999px;
  white-space: nowrap;
}
.tl-sub { color: var(--text-dim); font-size: 0.85rem; margin: 0.35rem 0 0.9rem; }
.tl-item ul { list-style: none; display: flex; flex-direction: column; gap: 0.55rem; }
.tl-item li {
  color: var(--text-dim); font-size: 0.93rem; line-height: 1.6;
  padding-left: 1.3rem; position: relative;
}
.tl-item li::before {
  content: "▹"; position: absolute; left: 0; top: 0; color: var(--accent);
}
.tl-item li strong { color: var(--text); }
.tl-item code {
  font-family: var(--font-mono); font-size: 0.85em;
  background: rgba(52,211,153,0.1); color: var(--accent);
  padding: 0.05rem 0.35rem; border-radius: 5px;
}

/* ---------- cards ---------- */
.cards-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.4rem; }
.cards-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.4rem; }

.card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.7rem;
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}
.card:hover {
  transform: translateY(-5px); border-color: rgba(52, 211, 153, 0.45);
  box-shadow: 0 16px 44px rgba(0, 0, 0, 0.4);
}
.card-icon { font-size: 1.7rem; margin-bottom: 0.9rem; }
.card h4 { font-size: 1.08rem; font-weight: 600; margin-bottom: 0.6rem; }
.card p { color: var(--text-dim); font-size: 0.93rem; }
.card-link { display: inline-block; margin-top: 1rem; font-size: 0.82rem; }

.skill ul { list-style: none; margin-top: 0.8rem; }
.skill li {
  color: var(--text-dim); font-size: 0.9rem; padding: 0.28rem 0;
  padding-left: 1.1rem; position: relative;
}
.skill li::before {
  content: "▸"; position: absolute; left: 0; color: var(--accent); font-size: 0.8rem;
}
.skill h4 { color: var(--accent-2); font-size: 0.95rem; }

/* ---------- writeups (horizontal scroller) ---------- */
.writeups {
  display: flex; gap: 1.4rem;
  overflow-x: auto; overflow-y: visible;
  scroll-snap-type: x proximity;
  scroll-padding-left: 0.2rem;
  padding: 0.5rem 0.2rem 1.5rem;      /* room for hover-lift + shadow + scrollbar */
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}
.writeups::-webkit-scrollbar { height: 8px; }
.writeups::-webkit-scrollbar-track { background: transparent; }
.writeups::-webkit-scrollbar-thumb {
  background: var(--border); border-radius: 999px;
}
.writeups::-webkit-scrollbar-thumb:hover { background: var(--accent); }
.writeup {
  flex: 0 0 clamp(280px, 78%, 360px);  /* fixed width; next card peeks = scroll hint */
  scroll-snap-align: start;
  display: flex; flex-direction: column; background: var(--card);
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 1.8rem; color: var(--text);
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}
.writeup:hover {
  transform: translateY(-5px); border-color: rgba(52, 211, 153, 0.45);
  box-shadow: 0 16px 44px rgba(0, 0, 0, 0.4); color: var(--text);
}
.writeup-meta {
  display: flex; align-items: center; gap: 0.5rem;
  font-size: 0.78rem; color: var(--text-dim); margin-bottom: 1rem;
}
.writeup-meta time { margin-left: auto; }
.writeup h4 { font-size: 1.12rem; font-weight: 600; line-height: 1.4; }
.writeup p { color: var(--text-dim); font-size: 0.93rem; margin-top: 0.6rem; }
.writeup .card-link { margin-top: auto; padding-top: 1rem; }
.more-link { margin-top: 2.2rem; text-align: center; }

/* ---------- writeups archive page ---------- */
.archive-main { padding-top: 108px; padding-bottom: 4rem; }
.archive-title {
  font-size: clamp(1.8rem, 4vw, 2.6rem); font-weight: 700;
  letter-spacing: -0.02em; margin: 0.6rem 0 0.4rem;
}
.archive-sub { color: var(--text-dim); margin-bottom: 2.5rem; }
.writeups-archive {
  display: flex; flex-direction: column; gap: 1.4rem;
  max-width: 720px;
}
/* cards flow into grid cells here (the flex-basis only applies in the scroller) */
.writeups-archive .writeup { scroll-snap-align: none; }
/* archive is a standalone page with no reveal JS — show cards immediately */
.writeups-archive .reveal { opacity: 1; transform: none; }

/* pagination controls */
.pager {
  display: flex; justify-content: center; flex-wrap: wrap; gap: 0.5rem;
  max-width: 720px; margin-top: 2.5rem;
}
.pager-btn {
  font-family: var(--font-mono); font-size: 0.85rem;
  min-width: 42px; padding: 0.5rem 0.85rem;
  background: var(--card); color: var(--text-dim);
  border: 1px solid var(--border); border-radius: 9px; cursor: pointer;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
}
.pager-btn:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); }
.pager-btn.active {
  background: var(--accent); color: #06281c; border-color: var(--accent);
}
.pager-btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* ---------- resume ---------- */
.resume-card {
  display: flex; align-items: center; justify-content: space-between;
  gap: 2rem; flex-wrap: wrap; padding: 2.2rem;
  background: linear-gradient(135deg, var(--card), rgba(52, 211, 153, 0.06));
}
.resume-card h4 { font-size: 1.25rem; margin-bottom: 0.4rem; }
.resume-card p { color: var(--text-dim); max-width: 460px; }

/* ---------- contact ---------- */
.contact { text-align: center; padding-bottom: 7rem; }
.contact .section-title { justify-content: center; }
.contact .section-title::after { display: none; }
.contact-desc { color: var(--text-dim); max-width: 480px; margin: 0 auto 2.2rem; }

/* ---------- article (mirrored writeup) ---------- */
.article { padding-top: 110px; padding-bottom: 4rem; max-width: 760px; }
.article .kicker a { color: var(--accent); }
.article h1 {
  font-size: clamp(1.8rem, 4.5vw, 2.6rem); font-weight: 700;
  letter-spacing: -0.02em; line-height: 1.15; margin: 0.6rem 0 1rem;
}
.article-meta { margin-bottom: 2.2rem; }
.article-body { color: var(--text); font-size: 1.05rem; line-height: 1.8; }
.article-body h1, .article-body h2, .article-body h3, .article-body h4 {
  font-weight: 600; line-height: 1.3; margin: 2rem 0 0.8rem;
}
.article-body h1 { font-size: 1.7rem; }
.article-body h2 { font-size: 1.4rem; }
.article-body h3 { font-size: 1.2rem; }
.article-body p { margin: 0 0 1.2rem; color: var(--text-dim); }
.article-body a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.article-body strong { color: var(--text); }
.article-body ul, .article-body ol { margin: 0 0 1.2rem 1.4rem; color: var(--text-dim); }
.article-body li { margin: 0.3rem 0; }
.article-body img {
  max-width: 100%; height: auto; border-radius: 10px;
  border: 1px solid var(--border); margin: 1rem 0; display: block;
}
.article-body figure { margin: 1.5rem 0; }
.article-body figcaption {
  text-align: center; font-size: 0.85rem; color: var(--text-dim); margin-top: 0.5rem;
}
.article-body pre {
  background: var(--card); border: 1px solid var(--border); border-radius: 10px;
  padding: 1rem 1.2rem; overflow-x: auto; font-family: var(--font-mono);
  font-size: 0.86rem; line-height: 1.6; margin: 0 0 1.2rem;
}
.article-body code {
  font-family: var(--font-mono); font-size: 0.88em;
  background: rgba(52,211,153,0.1); color: var(--accent);
  padding: 0.1rem 0.4rem; border-radius: 5px;
}
.article-body pre code { background: none; color: var(--text); padding: 0; }
.article-body blockquote {
  border-left: 3px solid var(--accent); margin: 0 0 1.2rem;
  padding: 0.4rem 1.2rem; color: var(--text-dim); font-style: italic;
}
.article-source {
  margin-top: 2.5rem; padding-top: 1.5rem; border-top: 1px solid var(--border);
  color: var(--text-dim); font-size: 0.9rem;
}

/* ---------- footer ---------- */
.footer {
  border-top: 1px solid var(--border);
  padding: 2rem 1.5rem; text-align: center;
  font-size: 0.82rem; color: var(--text-dim);
}

/* ---------- reveal animation ---------- */
.reveal {
  opacity: 0; transform: translateY(22px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .cursor { animation: none; }
}

/* ---------- responsive ---------- */
@media (max-width: 920px) {
  .cards-4 { grid-template-columns: repeat(2, 1fr); }
  .cards-3 { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 720px) {
  /* .writeups stays a horizontal scroller on mobile (see base rule) */
  .resume-card { flex-direction: column; align-items: flex-start; }

  .nav-toggle {
    display: flex; flex-direction: column; gap: 5px;
    background: none; border: none; cursor: pointer; padding: 6px;
  }
  .nav-toggle span {
    width: 22px; height: 2px; background: var(--text); border-radius: 2px;
    transition: transform 0.25s, opacity 0.25s;
  }
  .nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

  .nav-links {
    position: fixed; top: 68px; left: 0; right: 0;
    flex-direction: column; align-items: flex-start; gap: 0;
    background: var(--bg-soft); border-bottom: 1px solid var(--border);
    padding: 0.5rem 1.5rem 1.2rem;
    transform: translateY(-8px); opacity: 0; pointer-events: none;
    transition: transform 0.25s, opacity 0.25s;
  }
  .nav-links.open { transform: none; opacity: 1; pointer-events: auto; }
  .nav-links li { width: 100%; }
  .nav-links a:not(.btn) { display: block; padding: 0.8rem 0; font-size: 1rem; }
  .nav-links .btn { margin-top: 0.8rem; display: inline-block; }
}