/* ---------------------------------------------------------
   gsonego.com — design system
   Palette: near-black + single warm accent. No neon, no glow.
--------------------------------------------------------- */

:root {
  --bg: #12141a;
  --bg-elevated: #181b22;
  --bg-elevated-2: #1e222b;
  --text: #e9e8e4;
  --text-muted: #a6a9b4;
  --text-faint: #6d7180;
  --border: #262a33;
  --border-soft: #1e222b;
  --accent: #c9973f;
  --accent-strong: #e0ac4f;
  --accent-soft: rgba(201, 151, 63, 0.14);
  --accent-text-on: #14120a;
  --danger: #d9695f;
  --success: #6fae7f;

  --font-heading: 'Space Grotesk', 'Segoe UI', sans-serif;
  --font-body: 'Inter', 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Consolas', monospace;

  --max-width: 1100px;
  --radius-sm: 6px;
  --radius: 12px;
  --radius-lg: 18px;

  --shadow-card:
    0 1px 0 rgba(255, 255, 255, 0.03) inset, 0 8px 24px rgba(0, 0, 0, 0.35);
}

:root[data-theme='light'] {
  --bg: #f7f5f1;
  --bg-elevated: #ffffff;
  --bg-elevated-2: #f0ede7;
  --text: #1b1c20;
  --text-muted: #52545c;
  --text-faint: #86899;
  --border: #e3e0d9;
  --border-soft: #ece9e2;
  --accent-text-on: #14120a;
  --shadow-card:
    0 1px 0 rgba(255, 255, 255, 0.6) inset, 0 8px 24px rgba(0, 0, 0, 0.08);
}

/* ---------- Reset ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: inherit;
  text-decoration: none;
}
ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
h1,
h2,
h3,
h4 {
  font-family: var(--font-heading);
  line-height: 1.15;
  margin: 0 0 0.5em;
  font-weight: 600;
  letter-spacing: -0.01em;
}
p {
  margin: 0 0 1em;
  color: var(--text-muted);
}
button {
  font: inherit;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.skip-link {
  position: absolute;
  left: 12px;
  top: -48px;
  background: var(--accent);
  color: var(--accent-text-on);
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  transition: top 0.15s ease;
  z-index: 200;
}
.skip-link:focus {
  top: 12px;
}

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(18, 20, 26, 0.82);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--border-soft);
}
:root[data-theme='light'] .site-header {
  background: rgba(247, 245, 241, 0.85);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
}
.nav-brand {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.02em;
}

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

.nav-brand .braces {
  color: var(--accent);
  padding: 0 2px;
}

.nav-links {
  display: flex;
  gap: 28px;
  align-items: center;
}
.nav-links a {
  font-size: 0.94rem;
  color: var(--text-muted);
  transition: color 0.15s ease;
}
.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--text);
}
.nav-links a.current {
  color: var(--accent);
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  color: var(--text);
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  align-items: center;
  justify-content: center;
}
.nav-toggle svg {
  width: 20px;
  height: 20px;
}

.nav-separator {
  color: var(--text-muted);
}

@media (max-width: 760px) {
  .nav-toggle {
    display: inline-flex;
  }
  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border);
    padding: 12px 24px 20px;
    display: none;
  }
  .nav-links.open {
    display: flex;
  }
  .nav-links a {
    padding: 10px 0;
    width: 100%;
  }
}

/* ---------- Hero ---------- */
.hero {
  padding: 110px 0 90px;
  border-bottom: 1px solid var(--border-soft);
}
.hero-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 48px;
  flex-wrap: wrap;
}
.hero-content {
  flex: 1 1 480px;
}
.hero-photo-wrap {
  flex: 0 0 auto;
}
.hero-photo {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--border);
  box-shadow: var(--shadow-card);
}
@media (max-width: 760px) {
  .hero-photo {
    width: 140px;
    height: 140px;
  }
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 18px;
}
.hero-eyebrow::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  display: inline-block;
}
.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  max-width: 18ch;
}
.hero .role {
  color: var(--accent);
  font-weight: 500;
}
.hero-pitch {
  font-size: 1.1rem;
  max-width: 62ch;
  margin-top: 18px;
}
.hero-actions {
  display: flex;
  gap: 14px;
  margin-top: 32px;
  flex-wrap: wrap;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.94rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition:
    transform 0.12s ease,
    border-color 0.15s ease,
    background 0.15s ease,
    color 0.15s ease;
}
.btn:active {
  transform: translateY(1px);
}
.btn-primary {
  background: var(--accent);
  color: var(--accent-text-on);
}
.btn-primary:hover {
  background: var(--accent-strong);
}
.btn-ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}
.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.btn-sm {
  padding: 8px 14px;
  font-size: 0.85rem;
}
.btn[disabled] {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ---------- Sections ---------- */
.section {
  padding: 84px 0;
  border-bottom: 1px solid var(--border-soft);
}
.section:last-of-type {
  border-bottom: none;
}
.section-head {
  margin-bottom: 44px;
  max-width: 62ch;
}
.section-kicker {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 10px;
  display: block;
}
.section-head h2 {
  font-size: clamp(1.6rem, 3vw, 2.1rem);
}

.ad-slot {
  text-align: center;
}
.ad-slot-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 10px;
}

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition:
    opacity 0.6s ease,
    transform 0.6s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
}
@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  html {
    scroll-behavior: auto;
  }
}

/* ---------- About ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 48px;
}
@media (max-width: 760px) {
  .about-grid {
    grid-template-columns: 1fr;
  }
}

.interests-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 8px;
}
.interests-list li {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.langs {
  margin-top: 22px;
}
.langs h3 {
  font-size: 0.95rem;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-family: var(--font-body);
  font-weight: 600;
}

/* ---------- Experience ---------- */
.exp-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 30px;
  box-shadow: var(--shadow-card);
}
.exp-card h3 {
  font-size: 1.15rem;
  margin-bottom: 2px;
}
.exp-card .exp-meta {
  color: var(--text-faint);
  font-size: 0.88rem;
  margin-bottom: 16px;
  font-family: var(--font-mono);
}
.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 24px;
}
.tag {
  background: var(--accent-soft);
  color: var(--accent-strong);
  border: 1px solid rgba(201, 151, 63, 0.35);
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 0.82rem;
  font-family: var(--font-mono);
}

/* ---------- Projects ---------- */
.project-featured {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  background: linear-gradient(155deg, var(--bg-elevated), var(--bg-elevated-2));
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-card);
  margin-bottom: 36px;
}
@media (max-width: 760px) {
  .project-featured {
    grid-template-columns: 1fr;
  }
}
.project-featured .badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  border: 1px solid rgba(201, 151, 63, 0.4);
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: 14px;
}
.project-featured h3 {
  font-size: 1.6rem;
}
.project-visual {
  aspect-ratio: 4 / 3;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background:
    radial-gradient(
      circle at 30% 20%,
      rgba(201, 151, 63, 0.18),
      transparent 55%
    ),
    var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 2.4rem;
  letter-spacing: 0.05em;
  overflow: hidden;
}
.project-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  display: block;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 18px;
}
.project-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition:
    border-color 0.15s ease,
    transform 0.15s ease;
}
.project-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}
.project-card h4 {
  font-size: 1rem;
  margin: 0;
  font-family: var(--font-mono);
}
.project-card p {
  font-size: 0.9rem;
  margin: 0;
}
.project-card .placeholder {
  color: var(--text-faint);
  font-style: italic;
}
.project-card .card-link {
  margin-top: auto;
  font-size: 0.85rem;
  color: var(--accent);
  font-weight: 600;
}

/* ---------- Tools teaser (home) ---------- */
.tools-teaser {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 44px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}
.tools-teaser h2 {
  margin-bottom: 8px;
}
.tools-teaser p {
  margin-bottom: 0;
  max-width: 52ch;
}

/* ---------- Contact ---------- */
.contact-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.contact-card {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 20px;
  flex: 1 1 220px;
  transition: border-color 0.15s ease;
}
.contact-card:hover {
  border-color: var(--accent);
}
.contact-card .icon {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.contact-card .label {
  font-size: 0.78rem;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.contact-card .value {
  font-weight: 600;
  word-break: break-word;
}

/* ---------- Footer ---------- */
.site-footer {
  padding: 32px 0;
  color: var(--text-faint);
  font-size: 0.85rem;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.site-footer a {
  color: var(--text-faint);
}
.site-footer a:hover {
  color: var(--accent);
}

/* ---------- Tools hub & tool pages ---------- */
.tools-hub-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 20px;
}
.tool-hub-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition:
    border-color 0.15s ease,
    transform 0.15s ease;
}
.tool-hub-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}
.tool-hub-card .icon {
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 1.5rem;
}
.tool-hub-card h3 {
  font-size: 1.05rem;
  margin: 0;
}
.tool-hub-card p {
  font-size: 0.88rem;
  margin: 0;
}

.tool-page-head {
  margin-bottom: 36px;
}
.tool-back {
  font-size: 0.85rem;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 18px;
}
.tool-back:hover {
  color: var(--accent);
}

.tool-panel {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-card);
}
.tool-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
}
@media (max-width: 760px) {
  .tool-grid {
    grid-template-columns: 1fr;
  }
}

.field-group {
  margin-bottom: 18px;
}
.field-group label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 6px;
}
.field-row {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.field-checkbox {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--text-muted);
}
.field-checkbox input {
  accent-color: var(--accent);
  width: 16px;
  height: 16px;
}

input[type='text'],
input[type='number'],
select,
textarea {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.92rem;
}
input[type='text']:focus,
input[type='number']:focus,
select:focus,
textarea:focus {
  border-color: var(--accent);
}
textarea {
  resize: vertical;
  min-height: 90px;
}

.result-box {
  background: var(--bg);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  padding: 18px;
  min-height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}
.result-value {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  color: var(--accent-strong);
  word-break: break-all;
}
.result-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  width: 100%;
}
.result-list .result-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  background: var(--bg);
  border: 1px solid var(--border-soft);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
}

.copy-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  padding: 6px 12px;
  font-size: 0.8rem;
  cursor: pointer;
  flex-shrink: 0;
}
.copy-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.copy-btn.copied {
  border-color: var(--success);
  color: var(--success);
}

.validity-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 600;
}
.validity-badge.valid {
  background: rgba(111, 174, 127, 0.15);
  color: var(--success);
}
.validity-badge.invalid {
  background: rgba(217, 105, 95, 0.15);
  color: var(--danger);
}
.validity-badge.neutral {
  background: var(--bg-elevated);
  color: var(--text-muted);
}

.code-block-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}
.code-block-head h4 {
  font-size: 0.82rem;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin: 0;
}
.code-block {
  background: var(--bg);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  white-space: pre-wrap;
  word-break: break-word;
  overflow-x: auto;
  color: var(--text);
  margin: 0;
}

.disclaimer {
  margin-top: 20px;
  font-size: 0.82rem;
  color: var(--text-faint);
  border-left: 3px solid var(--accent);
  padding: 10px 16px;
  background: var(--accent-soft);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.tool-explainer h3 {
  font-size: 1rem;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-family: var(--font-body);
}