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

:root {
  --color-bg:           #080808;
  --color-surface:      #101010;
  --color-surface-2:    #161616;
  --color-border:       #1f1f1f;
  --color-text:         #ededed;
  --color-text-muted:   #666;
  --color-text-subtle:  #333;
  --color-accent:       #ededed;
  --color-accent-hover: #fff;

  --font: 'Space Grotesk', sans-serif;

  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.25rem;
  --text-2xl:  1.5rem;
  --text-3xl:  2rem;
  --text-4xl:  3rem;
  --text-5xl:  5rem;

  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-24: 6rem;
  --space-32: 8rem;

  --radius: 4px;
  --max-w: 1100px;
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* noise overlay */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  opacity: 0.03;
  pointer-events: none;
  z-index: 9999;
}

:focus-visible { outline: 1px solid var(--color-accent); outline-offset: 4px; }

a { color: inherit; text-decoration: none; }

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* ── NAV ── */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, background 0.3s ease;
}

nav.scrolled {
  background: rgba(8,8,8,0.85);
  backdrop-filter: blur(12px);
  border-color: var(--color-border);
}

.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: var(--space-4) var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-text);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  list-style: none;
}

.nav-links a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  transition: color 0.15s ease;
}

.nav-links a:hover { color: var(--color-text); }

.nav-cta {
  font-size: var(--text-sm);
  color: var(--color-text-muted) !important;
  border: 1px solid var(--color-border);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius);
  transition: color 0.15s ease, border-color 0.15s ease !important;
}

.nav-cta:hover {
  color: var(--color-text) !important;
  border-color: var(--color-text-subtle) !important;
}

/* ── HERO ── */
#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--color-border);
}

.hero-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 800px;
  height: 500px;
  background: radial-gradient(ellipse, rgba(237,237,237,0.04) 0%, transparent 65%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  padding: var(--space-32) 0 var(--space-24);
}

.hero-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  padding: var(--space-1) var(--space-3);
  border-radius: 100px;
  margin-bottom: var(--space-8);
}

.hero-label::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #4ade80;
}

.hero-title {
  font-size: clamp(3rem, 8vw, var(--text-5xl));
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-6);
}

.hero-title span {
  color: var(--color-text-muted);
}

.hero-sub {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 480px;
  line-height: 1.6;
  margin-bottom: var(--space-12);
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--color-text);
  color: var(--color-bg);
  font-family: var(--font);
  font-size: var(--text-sm);
  font-weight: 600;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  transition: opacity 0.15s ease;
}

.btn-primary:hover { opacity: 0.85; }

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  transition: color 0.15s ease;
}

.btn-ghost:hover { color: var(--color-text); }
.btn-ghost::after { content: '→'; transition: transform 0.15s ease; }
.btn-ghost:hover::after { transform: translateX(3px); }

/* ── SECTION BASE ── */
section {
  padding: var(--space-32) 0;
  border-bottom: 1px solid var(--color-border);
}

.section-label {
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-12);
}

.section-title {
  font-size: clamp(1.75rem, 4vw, var(--text-4xl));
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.1;
  margin-bottom: var(--space-6);
}

/* ── ABOUT ── */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: start;
}

.about-text p {
  color: var(--color-text-muted);
  font-size: var(--text-lg);
  line-height: 1.75;
  margin-bottom: var(--space-6);
}

.about-text p:last-child { margin-bottom: 0; }

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--color-border);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}

.stat {
  background: var(--color-surface);
  padding: var(--space-6);
}

.stat-value {
  font-size: var(--text-3xl);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: var(--space-2);
}

.stat-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* ── TOOLS ── */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-8);
}

.tool-group-label {
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}

.tool-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.tool-tag {
  font-size: var(--text-sm);
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius);
}

@media (max-width: 640px) {
  .tools-grid { grid-template-columns: 1fr; }
}

/* ── PROJECTS ── */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--color-border);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}

.project-card {
  background: var(--color-surface);
  padding: var(--space-8);
  transition: background 0.15s ease;
  display: flex;
  flex-direction: column;
}

.project-card:hover { background: var(--color-surface-2); }

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
}

.tag {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  padding: 2px var(--space-2);
  border-radius: 3px;
  letter-spacing: 0.04em;
}

.project-title {
  font-size: var(--text-xl);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-3);
}

.project-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
  flex: 1;
}

/* ── CONTACT ── */
#contact {
  border-bottom: none;
}

.contact-inner {
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.contact-inner .section-title {
  margin-bottom: var(--space-4);
}

.contact-inner p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-12);
}

.contact-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.contact-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius);
  transition: color 0.15s ease, border-color 0.15s ease;
}

.contact-link:hover {
  color: var(--color-text);
  border-color: var(--color-text-subtle);
}

/* ── FOOTER ── */
footer {
  padding: var(--space-8) 0;
  border-top: 1px solid var(--color-border);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer-inner p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.footer-fpv {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  transition: color 0.15s ease;
}

.footer-fpv:hover { color: var(--color-text); }

/* ── RESPONSIVE ── */
@media (max-width: 1024px) {
  .projects-grid { grid-template-columns: 1fr 1fr; } /* already 2-col, no change needed */
}

@media (max-width: 640px) {
  .nav-links { display: none; }
  .about-grid { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: 1fr; }
  .about-stats { grid-template-columns: 1fr 1fr; }
  .hero-title { letter-spacing: -0.02em; }
}

/* ── CONTACT FORM ── */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  max-width: 560px;
  margin: var(--space-8) auto 0;
  text-align: left;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-field label {
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.form-field input,
.form-field textarea {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-3) var(--space-4);
  font-family: var(--font);
  font-size: var(--text-sm);
  color: var(--color-text);
  transition: border-color 0.15s ease;
  resize: none;
  width: 100%;
}

.form-field input:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--color-text-subtle);
}

.form-field textarea { min-height: 140px; }

.form-submit {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.form-status {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.form-status.success { color: #4ade80; }
.form-status.error   { color: #f87171; }

@media (max-width: 640px) {
  .form-row { grid-template-columns: 1fr; }
}