/* ===== Elliot David — Tether / Coinbase / MARA inspired ===== */
:root {
  --bg-primary: #0a0a0b;
  --bg-secondary: #111113;
  --bg-card: #161618;
  --bg-elevated: #1c1c1f;
  --text-primary: #fafafa;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;
  --accent: #22c55e;
  --accent-hover: #16a34a;
  --accent-subtle: rgba(34, 197, 94, 0.15);
  --border: #27272a;
  --font-display: "Space Grotesk", system-ui, sans-serif;
  --font-body: "Inter", system-ui, sans-serif;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;
  --space-3xl: 8rem;
  --max-width: 75rem;
  --radius: 0.75rem;
  --radius-sm: 0.5rem;
  --transition: 0.2s ease;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; overflow-x: hidden; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-primary);
  overflow-x: hidden;
}

ul, ol { margin: 0; padding: 0; list-style: none; }

body.theme-dark img { opacity: 0.95; }
a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-hover); }
p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

.skip-link {
  position: absolute;
  top: -3rem;
  left: var(--space-sm);
  padding: var(--space-xs) var(--space-sm);
  background: var(--accent);
  color: var(--bg-primary);
  z-index: 100;
  border-radius: var(--radius-sm);
  transition: top var(--transition);
  font-weight: 600;
}
.skip-link:focus { top: var(--space-sm); }

/* Accent is now same as primary text — green only for links & buttons */
.accent { color: var(--text-primary); }

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
  overflow-x: hidden;
}

/* ===== Header — minimal, dark ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(10, 10, 11, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

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

.nav-logo {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}
.nav-logo:hover { color: var(--accent); }

.nav-links {
  display: flex;
  gap: var(--space-lg);
  list-style: none;
  padding: 0;
  margin: 0;
}

.nav-links a {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.9375rem;
}
.nav-links a:hover,
.nav-links a[aria-current="true"] { color: var(--text-primary); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  background: none;
  border: none;
  cursor: pointer;
}
.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--text-primary);
}

/* ===== Hero — bold, full impact ===== */
.hero {
  padding: var(--space-3xl) var(--space-lg) var(--space-2xl);
  min-height: 85vh;
  display: flex;
  align-items: center;
  background: var(--bg-primary);
}

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

.hero-with-photo .hero-content {
  display: grid;
  gap: var(--space-2xl);
  align-items: center;
  width: 100%;
}
@media (min-width: 56rem) {
  .hero-with-photo .hero-content {
    grid-template-columns: 340px 1fr;
    gap: var(--space-3xl);
    align-items: center;
  }
}

.hero-image-wrap { order: -1; }
@media (min-width: 56rem) { .hero-image-wrap { order: 0; } }

.hero-image {
  width: 100%;
  max-width: 340px;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

@keyframes hero-image-in {
  0% {
    opacity: 0;
    transform: scale(0.96);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}

.hero-image-animate {
  animation: hero-image-in 0.8s ease-out forwards;
}

.hero-text { min-width: 0; }

.hero-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--text-muted);
  margin-bottom: var(--space-sm);
  font-weight: 600;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.75rem, 7vw, 4.5rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin: 0 0 var(--space-sm);
}

.hero-tagline {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
  font-weight: 500;
}

.hero-desc {
  max-width: 36em;
  margin-bottom: var(--space-lg);
  color: var(--text-secondary);
  font-size: 1.0625rem;
}

.hero-actions { display: flex; flex-wrap: wrap; gap: var(--space-sm); }

/* ===== Buttons ===== */
.btn {
  display: inline-block;
  padding: 0.875rem 1.75rem;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}

.btn-primary {
  background: var(--accent);
  color: var(--bg-primary);
  border: none;
}
.btn-primary:hover { background: var(--accent-hover); color: var(--bg-primary); }

.btn-secondary {
  background: transparent;
  color: var(--accent);
  border: 2px solid var(--accent);
}
.btn-secondary:hover { background: var(--accent-subtle); color: var(--accent); }

/* ===== Sections ===== */
.section {
  padding: var(--space-3xl) 0;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 var(--space-lg);
  line-height: 1.2;
}

/* ===== About ===== */
.about { background: var(--bg-secondary); }

.about-figure {
  margin: 0 0 var(--space-xl);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
}

.about-section-img {
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 1;
  object-fit: cover;
}

.about-grid {
  display: grid;
  gap: var(--space-xl);
}
@media (min-width: 48rem) {
  .about-grid { grid-template-columns: 1fr 20rem; }
}

.about-text {
  max-width: 42em;
  color: var(--text-secondary);
}

.highlight-list {
  font-size: 0.9375rem;
  color: var(--text-muted);
}
.highlight-list li { margin-bottom: var(--space-xs); padding-left: 0; }
.highlight-list a { color: var(--accent); }

/* ===== Experience — horizontal scroll ===== */
.experience { background: var(--bg-primary); }

.experience-intro {
  margin-bottom: var(--space-md);
  color: var(--text-secondary);
}

.timeline-scroll {
  overflow-x: auto;
  overflow-y: hidden;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
  padding-bottom: var(--space-sm);
  margin-left: calc(-1 * var(--space-lg));
  margin-right: calc(-1 * var(--space-lg));
  padding-left: var(--space-lg);
  padding-right: var(--space-lg);
}

.timeline-scroll:focus {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.timeline {
  padding: 0;
  margin: 0;
}

@media (min-width: 48rem) {
  .timeline-horizontal {
    display: flex;
    gap: var(--space-md);
    width: max-content;
    padding-bottom: var(--space-xs);
  }

  .timeline-horizontal .timeline-item {
    scroll-snap-align: start;
    flex: 0 0 min(340px, 88vw);
    width: min(340px, 88vw);
    padding: var(--space-lg);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: border-color var(--transition), box-shadow var(--transition);
  }

  .timeline-horizontal .timeline-item:hover {
    border-color: var(--accent);
    box-shadow: 0 0 0 1px var(--accent-subtle);
  }

  .timeline-horizontal .timeline-marker {
    position: static;
    display: inline-block;
    width: 8px;
    height: 8px;
    margin-right: 0.5rem;
    vertical-align: middle;
    background: var(--accent);
    border-radius: 50%;
  }

  .timeline-horizontal .timeline-date { display: inline; }
}

.timeline-item {
  position: relative;
  padding-left: 2.5rem;
  padding-bottom: var(--space-lg);
}
.timeline-item:last-child { padding-bottom: 0; }

.timeline-marker {
  position: absolute;
  left: 0;
  top: 0.35em;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
}

.timeline-date {
  font-size: 0.8125rem;
  color: var(--text-muted);
  display: block;
  margin-bottom: 0.25rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

.timeline-title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  margin: 0 0 0.25rem;
  color: var(--text-primary);
}

.timeline-company {
  font-weight: 500;
  color: var(--text-muted);
  margin: 0 0 0.5rem;
  font-size: 0.9375rem;
}

.timeline-desc {
  font-size: 0.9375rem;
  color: var(--text-secondary);
}

/* ===== Work grid — cards ===== */
.work { background: var(--bg-secondary); }

.work-grid {
  display: grid;
  gap: var(--space-lg);
}
@media (min-width: 40rem) {
  .work-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 64rem) {
  .work-grid { grid-template-columns: repeat(2, 1fr); }
}

/* SBP featured as main work — full width, stacked layout */
.work-card-featured {
  grid-column: 1 / -1;
}
.work-card-featured .work-card-image {
  aspect-ratio: 21 / 9;
}
@media (min-width: 64rem) {
  .work-card-featured .work-card-inner {
    padding: var(--space-xl);
  }
  .work-card-featured .work-card-title {
    font-size: 1.5rem;
  }
  .work-card-featured .work-card-desc {
    font-size: 1rem;
  }
}

.work-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.work-card:hover {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent-subtle);
}

.work-card-image {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--bg-elevated);
}
.work-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.work-card-inner { padding: var(--space-lg); }

.work-card-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  margin: 0 0 0.25rem;
  color: var(--text-primary);
}

.work-card-meta {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin: 0 0 var(--space-sm);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.work-card-desc {
  font-size: 0.9375rem;
  margin-bottom: var(--space-sm);
  color: var(--text-secondary);
}

.work-card-link {
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--accent);
}

/* ===== Media / Speaking & Writing ===== */
.media { background: var(--bg-primary); }

.section-intro {
  max-width: 42em;
  margin: 0 0 var(--space-xl);
  color: var(--text-secondary);
}

.media-list {
  padding: 0;
  margin: 0;
}

.media-item {
  border-bottom: 1px solid var(--border);
}
.media-item:last-child { border-bottom: none; }

.media-link {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) 0;
  color: var(--text-primary);
  transition: background var(--transition);
  border-radius: var(--radius-sm);
}
.media-link:hover {
  color: var(--accent);
  background: var(--accent-subtle);
}
.media-link:hover .media-title { text-decoration: underline; }

.media-thumb {
  flex-shrink: 0;
  width: 120px;
  height: 80px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
}
.media-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-body { min-width: 0; }

.media-title {
  display: block;
  font-weight: 600;
  margin-bottom: 0.2rem;
}

.media-meta {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* ===== Challenges grid ===== */
.challenges { background: var(--bg-primary); }

.challenge-grid {
  display: grid;
  gap: var(--space-lg);
}
@media (min-width: 48rem) {
  .challenge-grid { grid-template-columns: repeat(3, 1fr); }
}

.challenge-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-xl) var(--space-lg);
  transition: border-color var(--transition);
}
.challenge-card:hover { border-color: var(--accent); }

.challenge-icon {
  color: var(--accent);
  margin-bottom: var(--space-md);
}

.challenge-title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
}

.challenge-stat {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent);
  margin: 0 0 var(--space-sm);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.challenge-desc {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  margin-bottom: var(--space-md);
}

.challenge-solutions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: var(--space-sm);
}

.challenge-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.3em 0.75em;
  border: 1px solid var(--accent);
  border-radius: 2rem;
  color: var(--accent);
}

.challenge-how {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin: 0;
}

/* ===== Interactive widgets ===== */
.live-btc { background: var(--bg-secondary); }
.co2-calc { background: var(--bg-primary); }
.grid-mix { background: var(--bg-secondary); }

.widget-grid {
  display: grid;
  gap: var(--space-md);
}
@media (min-width: 40rem) {
  .widget-grid { grid-template-columns: repeat(3, 1fr); }
}

.widget-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-lg);
  text-align: center;
}

.widget-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: var(--space-xs);
}

.widget-value {
  display: block;
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.widget-hint {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: var(--space-xs);
}

/* Calc boxes */
.calc-box {
  max-width: 36rem;
}

.calc-input-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  align-items: end;
  margin-bottom: var(--space-lg);
}

.calc-label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
  width: 100%;
}

.calc-input {
  flex: 1;
  min-width: 0;
  padding: 0.75rem 1rem;
  font-family: var(--font-body);
  font-size: 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  outline: none;
}
.calc-input:focus { border-color: var(--accent); }
.calc-input::placeholder { color: var(--text-muted); }

.calc-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%2371717a' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
}

.calc-btn {
  flex-shrink: 0;
}

.calc-result {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-lg);
  min-height: 4rem;
  color: var(--text-secondary);
}
.calc-result:empty { display: none; }

.calc-result strong {
  color: var(--text-primary);
}

.calc-result .co2-big {
  display: block;
  font-family: var(--font-display);
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--accent);
  margin: var(--space-xs) 0;
}

/* Grid mix bar */
.grid-bar {
  display: flex;
  height: 1.75rem;
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin: var(--space-sm) 0;
}
.grid-bar-seg {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--bg-primary);
  min-width: 1px;
}

.grid-legend {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-xs);
  font-size: 0.8125rem;
  color: var(--text-secondary);
}
.grid-legend-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 2px;
  margin-right: 0.25rem;
  vertical-align: middle;
}

/* ===== Work — genesis block background ===== */
.work-genesis {
  position: relative;
  overflow: hidden;
}

.genesis-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.8125rem;
  line-height: 2.2;
  color: rgba(250, 250, 250, 0.04);
  word-break: break-all;
  pointer-events: none;
  user-select: none;
  padding: var(--space-lg);
  z-index: 0;
}

.work-genesis .container {
  position: relative;
  z-index: 1;
}

/* ===== Contact / Connect ===== */
.contact { background: var(--bg-secondary); }

.contact-inner { text-align: center; }

.contact-text {
  margin-bottom: var(--space-lg);
  max-width: 28em;
  margin-left: auto;
  margin-right: auto;
  color: var(--text-secondary);
}

.contact-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-md);
}

.btn-connect {
  font-size: 1rem;
  padding: 1rem 2rem;
}

/* ===== Footer ===== */
.site-footer {
  padding: var(--space-lg) var(--space-lg);
  border-top: 1px solid var(--border);
  font-size: 0.875rem;
  color: var(--text-muted);
  background: var(--bg-primary);
}

/* ===== Mobile ===== */
@media (max-width: 47.9375rem) {
  .nav-toggle { display: flex; }

  .nav-links {
    position: fixed;
    top: 0;
    right: 0;
    width: min(18rem, 85vw);
    height: 100vh;
    background: var(--bg-secondary);
    border-left: 1px solid var(--border);
    flex-direction: column;
    padding: var(--space-2xl) var(--space-lg);
    gap: var(--space-md);
    transform: translateX(100%);
    transition: transform 0.25s ease;
    z-index: 40;
  }

  .nav-links.is-open { transform: translateX(0); }
  .nav-links a { font-size: 1.1rem; }

  .hero { min-height: auto; padding-top: var(--space-xl); padding-bottom: var(--space-xl); }
  .section { padding: var(--space-xl) 0; }
  .container { padding: 0 var(--space-md); }
  .timeline-scroll {
    margin-left: calc(-1 * var(--space-md));
    margin-right: calc(-1 * var(--space-md));
    padding-left: var(--space-md);
    padding-right: var(--space-md);
  }
}