/* =========================================================
   Design tokens
   ========================================================= */
:root {
  --bg: #0D1117;
  --surface: #141A24;
  --surface-2: #1B2330;
  --text: #E8ECF1;
  --text-dim: #9AA5B4;
  --accent: #D4A054;      /* brass / hospitality nod */
  --accent-2: #5FC9BC;    /* teal / code nod */
  --border: #262F3D;

  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --max-width: 1120px;
  --radius: 10px;
}

* { box-sizing: border-box; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

img { max-width: 100%; display: block; }

::selection { background: var(--accent); color: #1a1305; }

/* =========================================================
   Nav
   ========================================================= */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(13, 17, 23, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.nav__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  text-decoration: none;
  letter-spacing: 0.02em;
}

.nav__brand-dot { color: var(--accent); }

.nav__links {
  display: flex;
  gap: 32px;
}

.nav__links a {
  text-decoration: none;
  color: var(--text-dim);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s ease;
  position: relative;
}

.nav__links a:hover,
.nav__links a:focus-visible { color: var(--text); }

.nav__links a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width 0.2s ease;
}

.nav__links a:hover::after { width: 100%; }

.nav__toggle {
  display: none;
  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;
}

/* =========================================================
   Hero
   ========================================================= */
.hero {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 64px 24px 40px;
  min-height: 82vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.hero__inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  align-items: center;
}

.hero__eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-2);
  letter-spacing: 0.04em;
  margin: 0 0 18px;
  text-transform: uppercase;
}

.hero__title {
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 6vw, 4.4rem);
  line-height: 1.02;
  margin: 0 0 20px;
  letter-spacing: -0.02em;
}

.hero__tagline {
  color: var(--text-dim);
  font-size: 1.08rem;
  max-width: 46ch;
  margin: 0 0 32px;
}

.hero__cta {
  display: flex;
  gap: 14px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 26px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.15s ease, background 0.2s ease, border-color 0.2s ease;
  font-family: var(--font-body);
}

.btn:active { transform: scale(0.98); }

.btn--primary {
  background: var(--accent);
  color: #1a1305;
}

.btn--primary:hover { background: #e2ac5c; }

.btn--ghost {
  border-color: var(--border);
  color: var(--text);
  background: transparent;
}

.btn--ghost:hover { border-color: var(--accent-2); color: var(--accent-2); }

.btn--full { width: 100%; }

.btn:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }

.hero__meta {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  gap: 40px;
  flex-wrap: wrap;
}

.hero__meta li {
  font-size: 0.9rem;
  color: var(--text);
}

.hero__meta-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}

/* --- 3D cube signature element --- */
.hero__stage {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  perspective: 900px;
}

.cube-wrap {
  width: 220px;
  height: 220px;
  position: relative;
  transform-style: preserve-3d;
  cursor: grab;
}

.cube-wrap:active { cursor: grabbing; }

.cube {
  width: 100%;
  height: 100%;
  position: relative;
  transform-style: preserve-3d;
  transform: rotateX(-20deg) rotateY(35deg);
  transition: transform 0.1s ease-out;
  animation: cube-idle 10s ease-in-out infinite;
}

.cube-wrap.dragging .cube { animation: none; transition: none; }

.cube__face {
  position: absolute;
  width: 220px;
  height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--text);
  background: linear-gradient(145deg, var(--surface-2), var(--surface));
  border: 1px solid var(--border);
  border-radius: 14px;
  backface-visibility: hidden;
}

.cube__face--front  { transform: translateZ(110px); border-color: var(--accent); }
.cube__face--back   { transform: rotateY(180deg) translateZ(110px); }
.cube__face--right  { transform: rotateY(90deg) translateZ(110px); border-color: var(--accent-2); }
.cube__face--left   { transform: rotateY(-90deg) translateZ(110px); }
.cube__face--top    { transform: rotateX(90deg) translateZ(110px); }
.cube__face--bottom { transform: rotateX(-90deg) translateZ(110px); }

@keyframes cube-idle {
  0%, 100% { transform: rotateX(-20deg) rotateY(35deg); }
  50% { transform: rotateX(-20deg) rotateY(395deg); }
}

.hero__stage-hint {
  margin-top: 24px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
  letter-spacing: 0.04em;
}

.hero__scroll {
  margin: 40px auto 0;
  width: 22px;
  height: 36px;
  border: 1px solid var(--border);
  border-radius: 12px;
  display: flex;
  justify-content: center;
  padding-top: 6px;
}

.hero__scroll span {
  width: 3px;
  height: 8px;
  background: var(--accent);
  border-radius: 2px;
  animation: scroll-dot 1.6s ease infinite;
}

@keyframes scroll-dot {
  0% { opacity: 0; transform: translateY(0); }
  30% { opacity: 1; }
  100% { opacity: 0; transform: translateY(10px); }
}

/* =========================================================
   Sections (shared)
   ========================================================= */
.section {
  padding: 100px 24px;
}

.section--alt { background: var(--surface); }

.section__inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.section__eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin: 0 0 14px;
}

.section__title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.6vw, 2.6rem);
  line-height: 1.15;
  margin: 0 0 28px;
  letter-spacing: -0.01em;
}

.section__body {
  color: var(--text-dim);
  font-size: 1.05rem;
  max-width: 68ch;
}

.section__body--tight { margin-bottom: 40px; }

.section__body a { color: var(--accent-2); text-decoration: underline; }

/* =========================================================
   Skills
   ========================================================= */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.skill-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.skill-card:hover {
  border-color: var(--accent-2);
  transform: translateY(-3px);
}

.skill-card__tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent-2);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 10px;
}

.skill-card h3 {
  font-family: var(--font-display);
  margin: 0 0 8px;
  font-size: 1.15rem;
}

.skill-card p {
  color: var(--text-dim);
  font-size: 0.92rem;
  margin: 0;
}

/* =========================================================
   Projects
   ========================================================= */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.project-card {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.project-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
}

.project-card__head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 18px;
}

.project-card__num {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 0.85rem;
}

.project-card__stack {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-dim);
  border: 1px solid var(--border);
  padding: 4px 10px;
  border-radius: 100px;
}

.project-card h3 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  margin: 0 0 12px;
}

.project-card p {
  color: var(--text-dim);
  font-size: 0.95rem;
  flex-grow: 1;
  margin: 0 0 20px;
}

.project-card__link {
  text-decoration: none;
  color: var(--accent-2);
  font-weight: 600;
  font-size: 0.9rem;
}

.project-card__link:hover { text-decoration: underline; }

/* =========================================================
   Contact form
   ========================================================= */
.contact-form {
  max-width: 560px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 48px;
}

.form-row {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-row label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.form-row input,
.form-row textarea {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 13px 16px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.95rem;
  resize: vertical;
  transition: border-color 0.2s ease;
}

.form-row input:focus,
.form-row textarea:focus {
  outline: none;
  border-color: var(--accent-2);
}

.form-row input:invalid:not(:placeholder-shown),
.form-row textarea:invalid:not(:placeholder-shown) {
  border-color: #d4665a;
}

.social-row {
  display: flex;
  gap: 24px;
}

.social-row a {
  text-decoration: none;
  color: var(--text-dim);
  font-size: 0.9rem;
  font-weight: 500;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.social-row a:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* =========================================================
   Footer
   ========================================================= */
.footer {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 32px 24px 60px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-dim);
  font-size: 0.85rem;
}

.footer__top {
  text-decoration: none;
  color: var(--text-dim);
}

.footer__top:hover { color: var(--accent); }

/* =========================================================
   Focus visibility (accessibility floor)
   ========================================================= */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--accent-2);
  outline-offset: 2px;
}

/* =========================================================
   Responsive
   ========================================================= */
@media (max-width: 880px) {
  .hero__inner {
    grid-template-columns: 1fr;
  }

  .hero__stage { order: -1; margin-bottom: 20px; }

  .skills-grid { grid-template-columns: repeat(2, 1fr); }

  .projects-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .nav__links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 20px 24px;
    gap: 18px;
    display: none;
  }

  .nav__links.open { display: flex; }

  .nav__toggle { display: flex; }

  .skills-grid { grid-template-columns: 1fr; }

  .hero__meta { gap: 24px; }

  .cube-wrap, .cube__face { width: 180px; height: 180px; }
  .cube__face--front,
  .cube__face--right { transform: translateZ(90px); }
  .cube__face--back  { transform: rotateY(180deg) translateZ(90px); }
  .cube__face--right { transform: rotateY(90deg) translateZ(90px); }
  .cube__face--left  { transform: rotateY(-90deg) translateZ(90px); }
  .cube__face--top    { transform: rotateX(90deg) translateZ(90px); }
  .cube__face--bottom { transform: rotateX(-90deg) translateZ(90px); }

  .footer { flex-direction: column; gap: 12px; text-align: center; }
}