/* ============ Tokens ============ */
:root {
  --ink: #14171c;
  --ink-soft: #2a2f38;
  --paper: #f6f4ef;
  --paper-dim: #efece4;
  --line: #ddd8cc;
  --muted: #6c6f76;
  --indigo: #3454d1;
  --indigo-dark: #253c9c;
  --brass: #b9832b;

  --font-display: "Fraunces", serif;
  --font-body: "IBM Plex Sans", -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;

  --max: 1180px;
  --gutter: clamp(24px, 5vw, 64px);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { font-family: var(--font-display); color: var(--ink); margin: 0; font-weight: 500; }
p { margin: 0; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; margin: 0; padding: 0; }
img { max-width: 100%; display: block; }

::selection { background: var(--indigo); color: #fff; }

:focus-visible {
  outline: 2px solid var(--indigo);
  outline-offset: 3px;
}

.grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 999;
  opacity: 0.035;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.kicker {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--muted);
  margin: 0 0 14px;
  letter-spacing: 0.02em;
}

section { padding: 96px var(--gutter) 0; max-width: var(--max); margin: 0 auto; }
.contact { padding-bottom: 96px; }

.section-head { max-width: 640px; margin-bottom: 48px; }
.section-head h2 { font-size: clamp(28px, 3.6vw, 40px); line-height: 1.15; }

/* ============ Buttons ============ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 14px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.btn-solid { background: var(--ink); color: var(--paper); }
.btn-solid:hover { background: var(--indigo-dark); }
.btn-line { border-color: var(--ink); color: var(--ink); background: transparent; }
.btn-line:hover { background: var(--ink); color: var(--paper); }

/* ============ Topbar ============ */
.topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px var(--gutter);
  background: rgba(246, 244, 239, 0.88);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.brand {
  font-family: var(--font-display);
  font-size: 19px;
}
.nav { display: flex; gap: 32px; }
.nav a { font-size: 14px; color: var(--ink-soft); }
.nav a:hover { color: var(--indigo); }
.nav-cta { display: inline-flex; }
.nav-toggle { display: none; }

/* ============ Hero ============ */
.hero { padding-top: 72px; }
.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 64px;
  align-items: center;
  padding-bottom: 96px;
  border-bottom: 1px solid var(--line);
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 28px;
}
.status-dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: #3fae63;
  box-shadow: 0 0 0 3px rgba(63,174,99,0.18);
}

.hero-copy h1 {
  font-size: clamp(38px, 5.4vw, 64px);
  line-height: 1.06;
  letter-spacing: -0.01em;
  max-width: 15ch;
}

.hero-lede {
  margin-top: 24px;
  max-width: 46ch;
  font-size: 17px;
  color: var(--ink-soft);
}

.hero-actions { display: flex; gap: 14px; margin-top: 36px; flex-wrap: wrap; }

.hero-links { display: flex; gap: 24px; margin-top: 32px; }
.hero-links a { font-family: var(--font-mono); font-size: 13px; color: var(--muted); }
.hero-links a:hover { color: var(--indigo); }

/* Terminal panel */
.term {
  background: var(--ink);
  border-radius: 6px;
  overflow: hidden;
  box-shadow: 10px 14px 0 var(--line);
}
.term-bar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 12px 16px;
  background: #1c2029;
  border-bottom: 1px solid #2a2f3a;
}
.term-bar span {
  width: 9px; height: 9px; border-radius: 50%; background: #3c4150;
}
.term-bar p {
  margin-left: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: #6b7280;
}
.term-body {
  padding: 22px 20px 26px;
  font-family: var(--font-mono);
  font-size: 13.5px;
  color: #cfd3da;
}
.term-body p { margin-bottom: 6px; }
.prompt { color: #6ee7d8; margin-right: 6px; }
.out { color: #9aa1ad; margin-bottom: 18px !important; padding-left: 16px; }
.type-line { margin-top: 4px; }
.cursor { animation: blink 1s step-end infinite; color: #6ee7d8; }
@keyframes blink { 50% { opacity: 0; } }

/* ============ About ============ */
.about-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 56px;
  padding-bottom: 56px;
  border-bottom: 1px solid var(--line);
}
.about-text { font-size: 17px; color: var(--ink-soft); max-width: 56ch; }

.stat-list { display: flex; gap: 40px; margin: 0; }
.stat-list dt {
  font-family: var(--font-display);
  font-size: 34px;
  color: var(--indigo);
}
.stat-list dd { margin: 6px 0 0; font-size: 13px; color: var(--muted); max-width: 12ch; }

.about-cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px;
  padding: 56px 0 96px;
}
.about-cols h3 { font-size: 15px; font-weight: 600; font-family: var(--font-body); margin-bottom: 18px; }

.tag-list li {
  font-family: var(--font-mono);
  font-size: 13.5px;
  color: var(--ink-soft);
  padding: 9px 0;
  border-bottom: 1px solid var(--line);
}
.tag-list.inline { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0; }
.tag-list.inline li {
  border: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 5px 11px;
  border-radius: 3px;
  font-size: 12.5px;
  color: var(--muted);
}

.edu-list li { padding: 14px 0; border-bottom: 1px solid var(--line); }
.edu-time { font-family: var(--font-mono); font-size: 12px; color: var(--brass); margin-bottom: 6px; }
.edu-title { font-size: 14.5px; font-weight: 500; }
.edu-sub { font-size: 13px; color: var(--muted); margin-top: 3px; }

/* ============ Work ============ */
.filters { display: flex; gap: 10px; margin-bottom: 40px; flex-wrap: wrap; }
.filter {
  font-family: var(--font-mono);
  font-size: 13px;
  padding: 9px 16px;
  border-radius: 3px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}
.filter.is-active, .filter:hover { border-color: var(--ink); color: var(--ink); }

.project-list { border-top: 1px solid var(--line); }
.project {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 40px;
  padding: 44px 0;
  border-bottom: 1px solid var(--line);
}
.project[hidden] { display: none; }

.project-media {
  aspect-ratio: 4/3;
  border-radius: 4px;
  overflow: hidden;
  background: var(--paper-dim);
}
.project-media img { width: 100%; height: 100%; object-fit: cover; }

.project-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 14px;
  flex-wrap: wrap;
}
.pill {
  border: 1px solid var(--ink);
  color: var(--ink);
  padding: 4px 10px;
  border-radius: 3px;
}
.pill-patent { border-color: var(--brass); color: var(--brass); }

.project h3 { font-size: 23px; margin-bottom: 12px; max-width: 34ch; }
.project p { color: var(--ink-soft); max-width: 60ch; font-size: 15px; }
.project-link {
  display: inline-block;
  margin-top: 20px;
  font-family: var(--font-mono);
  font-size: 13.5px;
  color: var(--indigo);
  border-bottom: 1px solid transparent;
}
.project-link:hover { border-color: var(--indigo); }

/* ============ Expertise ============ */
.expertise { padding-bottom: 96px; }
.expertise-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.expertise-item { background: var(--paper); padding: 36px; }
.expertise-item h3 { font-size: 19px; margin-bottom: 12px; }
.expertise-item p { color: var(--ink-soft); font-size: 14.5px; max-width: 42ch; }

/* ============ Contact ============ */
.contact { background: var(--ink); color: var(--paper); border-radius: 8px 8px 0 0; margin-top: 40px; }
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
}
.contact .kicker { color: #8b93a1; }
.contact h2 { color: var(--paper); font-size: clamp(26px, 3.2vw, 36px); max-width: 16ch; }
.contact-copy p:not(.kicker) { color: #c3c7ce; margin-top: 18px; max-width: 42ch; font-size: 15.5px; }

.contact-details { margin-top: 44px; display: flex; flex-direction: column; gap: 20px; }
.contact-details .label { font-family: var(--font-mono); font-size: 12px; color: #7d8592; margin-bottom: 5px; }
.contact-details a:hover { color: #6ee7d8; }

.contact-form { display: flex; flex-direction: column; gap: 20px; }
.field { display: flex; flex-direction: column; gap: 8px; position: relative; }
.field label { font-family: var(--font-mono); font-size: 12.5px; color: #9aa1ad; }
.field input, .field textarea {
  background: transparent;
  border: none;
  border-bottom: 1px solid #3a3f4a;
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 15px;
  padding: 10px 2px;
  resize: vertical;
}
.field input:focus, .field textarea:focus { outline: none; border-color: #6ee7d8; }
.field-error { display: none; color: #e08585; font-size: 12px; font-family: var(--font-mono); }
.field.is-invalid .field-error { display: block; }
.field.is-invalid input, .field.is-invalid textarea { border-color: #e08585; }

.contact-form .btn-solid { background: #6ee7d8; color: #0b0d10; margin-top: 8px; }
.contact-form .btn-solid:hover { background: #55d4c4; }

.form-success {
  display: none;
  font-family: var(--font-mono);
  font-size: 13px;
  color: #6ee7d8;
  margin-top: 4px;
}
.form-success.is-visible { display: block; }

/* ============ Footer ============ */
.footer {
  background: var(--ink);
  color: #8b93a1;
  padding: 40px var(--gutter) 44px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}
.footer .brand { color: var(--paper); }
.footer .nav a { color: #8b93a1; }
.footer .nav a:hover { color: var(--paper); }
.copyright { font-family: var(--font-mono); font-size: 12.5px; width: 100%; order: 3; padding-top: 20px; border-top: 1px solid #2a2f38; }

/* ============ Responsive ============ */
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
  .term { max-width: 480px; }
  .about-grid, .about-cols { grid-template-columns: 1fr; }
  .stat-list { flex-wrap: wrap; }
  .project { grid-template-columns: 1fr; }
  .project-media { max-width: 320px; }
  .expertise-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; gap: 48px; }
}

@media (max-width: 720px) {
  .nav { display: none; }
  .nav-cta { display: none; }
  .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(--ink); }
  section { padding-top: 64px; }
}