/* ============================================================
   Design Tokens
   ============================================================ */
:root {
  --bg-base: #080808;
  --bg-surface: #111111;
  --bg-elevated: #1a1a1a;
  --accent: #C8F135;
  --accent-dim: #a8cc20;
  --text-primary: #f0f0f0;
  --text-secondary: #888888;
  --text-muted: #444444;
  --border: #222222;

  --font-sans: 'Space Grotesk', sans-serif;
  --font-mono: 'Courier New', Courier, monospace;

  /* Type scale */
  --fs-hero: clamp(2.8rem, 6vw, 5rem);
  --fs-section: clamp(1.6rem, 3vw, 2.4rem);
  --fs-body: 1rem;
  --lh-body: 1.7;
  --fs-label: 0.75rem;
}

/* ============================================================
   Loading Screen
   ============================================================ */
#loader {
  position: fixed;
  inset: 0;
  background: var(--bg-base);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 10000;
  transition: opacity 0.5s ease;
}

#loader.fade-out {
  opacity: 0;
  pointer-events: none;
}

#loader-svg {
  width: 320px;
  height: 320px;
}

#loader-svg line {
  stroke: var(--accent);
  stroke-width: 1;
  opacity: 0;
  transition: opacity 0.3s ease;
}

#loader-svg circle {
  fill: var(--accent);
  opacity: 0;
  transition: opacity 0.2s ease, r 0.3s ease;
}

#loader-counter {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-secondary);
  margin-top: 2rem;
}

#loader-counter::before {
  content: 'LOADING [';
  color: var(--accent);
}

/* ============================================================
   Reset & Base
   ============================================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: auto;
}

body {
  background-color: var(--bg-base);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  overflow-x: hidden;
}

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

ul {
  list-style: none;
}

/* ============================================================
   Navigation
   ============================================================ */
#nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 2rem;
  transition: background 0.3s ease, backdrop-filter 0.3s ease;
}

#nav.nav--scrolled {
  background: rgba(8, 8, 8, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.nav-logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.05em;
}

.nav-logo img {
  height: 48px;
  width: auto;
  display: block;
}

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-links a {
  font-size: var(--fs-label);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  transition: color 0.2s ease;
}

.nav-links a:hover,
.nav-links a.nav-link--active {
  color: var(--accent);
}

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  min-height: 44px;
  min-width: 44px;
  align-items: center;
  justify-content: center;
}

.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

/* ============================================================
   Nav Overlay (mobile)
   ============================================================ */
.nav-overlay {
  position: fixed;
  inset: 0;
  z-index: 99;
  background: var(--bg-base);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.nav-overlay.nav-overlay--open {
  opacity: 1;
  pointer-events: all;
}

.nav-overlay ul {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  text-align: center;
}

.nav-overlay a {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
  transition: color 0.2s ease;
}

.nav-overlay a:hover {
  color: var(--accent);
}

/* ============================================================
   Hero Section
   ============================================================ */
#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 8rem 2rem 4rem;
  overflow: hidden;
}

#hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.03;
  pointer-events: none;
}

.hero-label {
  font-size: var(--fs-label);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 1.5rem;
}

.hero-headline {
  font-size: var(--fs-hero);
  font-weight: 700;
  line-height: 1.1;
  color: var(--text-primary);
  max-width: 18ch;
  margin-bottom: 1.5rem;
}

.hero-typewriter {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
  min-height: 2rem;
}

.typewriter-cursor {
  color: var(--accent);
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

.hero-ctas {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 4rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.75rem;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: 4px;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
  min-height: 44px;
  min-width: 44px;
  cursor: pointer;
  border: 2px solid transparent;
}

.btn--primary {
  background: var(--accent);
  color: var(--bg-base);
  border-color: var(--accent);
}

.btn--primary:hover {
  background: var(--accent-dim);
  border-color: var(--accent-dim);
}

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

.btn--ghost:hover {
  border-color: var(--text-secondary);
}

.hero-scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  color: var(--text-muted);
  font-size: 1.25rem;
  animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(6px); }
}

/* ============================================================
   Section Base
   ============================================================ */
section {
  padding: 6rem 2rem;
  max-width: 1100px;
  margin: 0 auto;
}

.section-heading {
  font-size: var(--fs-section);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 3rem;
}

/* ============================================================
   Systems Built — Accordion
   ============================================================ */
.accordion-item {
  border-top: 1px solid var(--border);
}

.accordion-item:last-child {
  border-bottom: 1px solid var(--border);
}

.accordion-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 1.5rem 0;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 1rem;
  text-align: left;
  min-height: 44px;
  transition: color 0.2s ease;
}

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

.accordion-index {
  font-size: var(--fs-label);
  font-family: var(--font-mono);
  color: var(--text-muted);
  min-width: 2ch;
}

.accordion-title {
  flex: 1;
  font-size: 1.1rem;
  font-weight: 600;
}

.accordion-arrow {
  color: var(--text-muted);
  transition: transform 0.35s ease;
  font-size: 1rem;
}

.accordion-trigger[aria-expanded="true"] .accordion-arrow {
  transform: rotate(180deg);
}

.accordion-panel {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}

.accordion-panel-inner {
  padding: 0 0 2rem 3.5rem;
}

.accordion-problem {
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.accordion-bullets {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.accordion-bullets li {
  color: var(--text-secondary);
  padding-left: 1rem;
  position: relative;
}

.accordion-bullets li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--accent);
}

.accordion-link {
  font-size: var(--fs-label);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  transition: color 0.2s ease;
}

.accordion-link:hover {
  color: var(--accent-dim);
}

/* ============================================================
   How I Think
   ============================================================ */
.thinking-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
}

.thinking-bio p {
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
}

.stack-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.5rem;
}

.stack-tag {
  font-size: var(--fs-label);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 2px;
  padding: 0.25rem 0.6rem;
}

.thinking-principles ul {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.thinking-principles li {
  color: var(--text-secondary);
  padding-left: 1.25rem;
  position: relative;
}

.thinking-principles li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--accent);
}

/* ============================================================
   Live Proof
   ============================================================ */
.credential-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.credential-item {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.25rem;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 4px;
}

.credential-name {
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.credential-issuer {
  font-size: var(--fs-label);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}

.credential-verify {
  font-size: var(--fs-label);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
  white-space: nowrap;
  transition: color 0.2s ease;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.credential-verify:hover {
  color: var(--accent-dim);
}

.proof-links {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
}

.proof-links a {
  font-size: var(--fs-label);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  transition: color 0.2s ease;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  min-width: 44px;
}

.proof-links a:hover {
  color: var(--accent);
}

/* ============================================================
   Talk / Contact
   ============================================================ */
.talk-layout {
  display: flex;
  align-items: center;
  gap: 4rem;
}

#talk .section-heading {
  margin-top: 0;
  margin-bottom: 1rem;
  line-height: 1.2;
}

.talk-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  line-height: 1.4;
}

.talk-content > *:last-child {
  margin-bottom: 0;
}

.talk-email {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 0.75rem;
}

#email-address {
  font-size: 1.1rem;
  color: var(--text-primary);
}

.copy-btn {
  font-size: var(--fs-label);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--bg-base);
  background: var(--accent);
  border: none;
  border-radius: 2px;
  padding: 0.4rem 0.9rem;
  cursor: pointer;
  min-height: 44px;
  min-width: 44px;
  transition: background 0.2s ease;
}

.copy-btn:hover {
  background: var(--accent-dim);
}

.talk-links {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  gap: 0.5rem 2rem;
  margin-bottom: 0.75rem;
}

.talk-links a {
  font-size: var(--fs-label);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  transition: color 0.2s ease;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  line-height: 1.2;
}

.talk-links a:hover {
  color: var(--accent);
}

.talk-photo {
  flex-shrink: 0;
  width: 250px;
}

.talk-photo img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  object-position: top;
  border-radius: 12px;
  border: 2px solid var(--border);
  display: block;
  filter: grayscale(20%);
}

/* ============================================================
   Footer
   ============================================================ */
footer {
  border-top: 1px solid var(--border);
  padding: 2rem;
  text-align: center;
  color: var(--text-muted);
  font-size: var(--fs-label);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ============================================================
   Scroll Reveal
   ============================================================ */
[data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease-out, transform 0.5s ease-out;
}

[data-reveal].revealed {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   Custom Cursor
   ============================================================ */
@media (pointer: fine) {
  html, body, a, button, [role="button"], input, textarea, select, label {
    cursor: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24'%3E%3Cpath d='M8 2v13l3-3 2 5 2-1-2-5h4z' fill='%23C8F135' stroke='%23080808' stroke-width='1.5' stroke-linejoin='round'/%3E%3C/svg%3E") 0 0, pointer;
  }
}




/* ============================================================
   Responsive — 768px
   ============================================================ */
@media (max-width: 768px) {
  /* Nav: hide links, show hamburger */
  .nav-links {
    display: none;
  }

  .nav-hamburger {
    display: flex;
  }

  /* How I Think: collapse to single column */
  .thinking-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  /* Section spacing */
  section {
    padding: 4rem 1.25rem;
  }

  #hero {
    padding: 7rem 1.25rem 3rem;
  }

  /* Restore default cursor on mobile */
  html, body, a, button, [role="button"], input, textarea, select, label {
    cursor: auto;
  }

  /* Prevent accordion inner padding from causing overflow */
  .accordion-panel-inner {
    padding-left: 1.5rem;
  }

  /* Ensure talk/proof links wrap properly */
  .talk-links,
  .proof-links {
    flex-wrap: wrap;
  }

  .talk-layout {
    flex-direction: column;
    gap: 2rem;
  }

  .talk-photo {
    width: 140px;
    align-self: center;
  }
}

/* ============================================================
   Responsive — 480px
   ============================================================ */
@media (max-width: 480px) {
  /* Tighter section spacing */
  section {
    padding: 3rem 1rem;
  }

  #hero {
    padding: 6rem 1rem 2.5rem;
  }

  /* Smaller font sizes for small screens */
  :root {
    --fs-hero: clamp(2rem, 8vw, 2.8rem);
    --fs-section: clamp(1.4rem, 5vw, 1.8rem);
  }

  .hero-typewriter {
    font-size: 1rem;
  }

  /* Stack CTAs vertically */
  .hero-ctas {
    flex-direction: column;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }

  /* Stack credential items vertically */
  .credential-item {
    flex-direction: column;
  }

  /* Tighter proof links gap */
  .proof-links {
    gap: 1rem;
  }

  /* Reduce accordion inner indent further */
  .accordion-panel-inner {
    padding-left: 1rem;
  }

  /* Nav padding tighter */
  #nav {
    padding: 1rem 1rem;
  }

  /* Stack tags wrap tightly */
  .stack-tags {
    gap: 0.375rem;
  }
}