/* ===========================================================
   TOKENS — read directly off reference screenshots
   =========================================================== */
:root {
  --bg: #070d09;
  --bg-vignette: #0c150e;
  --bg-elevated: #0d130f;
  --bg-elevated-2: #111810;
  --bg-nav: rgba(7, 13, 9, 0.88);
  --accent: #3ddc1f;
  --accent-dim: #2a9e16;
  --accent-gradient: linear-gradient(135deg, #5dff2e 0%, #0a3d08 100%);
  --diff-remove: #b85858;
  --diff-remove-bg: rgba(184, 88, 88, 0.08);
  --border: #1c241d;
  --border-bright: #2a3329;
  --text-primary: #ffffff;
  --text-secondary: #b8bcb8;
  --text-tertiary: #828a80;

  --font-body: 'Noto Sans', sans-serif;
  --font-mono: 'SF Mono', 'Consolas', 'Monaco', 'Courier New', monospace;

  --container: 1140px;
  --radius: 4px;
}

html[data-theme="light"] {
  --bg: #f4f7f3;
  --bg-vignette: #eef2ec;
  --bg-elevated: #ffffff;
  --bg-elevated-2: #eaf0e7;
  --bg-nav: rgba(244, 247, 243, 0.9);
  --accent: #1f8c0e;
  --accent-dim: #176b0a;
  --accent-gradient: linear-gradient(135deg, #2bb016 0%, #0a3d08 100%);
  --diff-remove: #a23f3f;
  --diff-remove-bg: rgba(162, 63, 63, 0.08);
  --border: #d8e0d4;
  --border-bright: #c2cdbd;
  --text-primary: #0d160d;
  --text-secondary: #3c463a;
  --text-tertiary: #6b756a;
}

.theme-toggle {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--text-primary);
  border-radius: 999px;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  cursor: pointer;
  margin-left: 16px;
  transition: border-color 0.15s, color 0.15s;
}
.theme-toggle:hover { border-color: var(--accent); color: var(--accent); }

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

.mono { font-family: var(--font-mono); }

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

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

ul { list-style: none; }

/* ===========================================================
   NAV
   =========================================================== */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px clamp(20px, 5vw, 60px);
  background: var(--bg-nav);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.nav-mark {
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.04em;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-mark .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent-gradient);
  display: inline-block;
}

.nav-links {
  display: flex;
  gap: 30px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
}

.nav-links a { transition: color 0.15s; }
.nav-links a:hover, .nav-links a:focus-visible { color: var(--accent); }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 22px;
  cursor: pointer;
}

@media (max-width: 720px) {
  .nav-links {
    position: fixed;
    top: 66px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--bg-elevated);
    padding: 20px;
    gap: 16px;
    border-bottom: 1px solid var(--border);
    transform: translateY(-110%);
    transition: transform 0.25s ease;
  }
  .nav-links.open { transform: translateY(0); }
  .nav-toggle { display: block; }
}

/* ===========================================================
   HERO
   =========================================================== */
.hero {
  max-width: var(--container);
  margin: 0 auto;
  padding: clamp(50px, 8vw, 90px) clamp(20px, 5vw, 40px) clamp(50px, 7vw, 80px);
  position: relative;
  z-index: 2;
  background: radial-gradient(ellipse 900px 500px at 30% 0%, rgba(61, 220, 31, 0.06), transparent 70%);
}

.kicker {
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  margin-bottom: 22px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.kicker::before {
  content: '';
  width: 18px;
  height: 1px;
  background: var(--accent);
  display: inline-block;
}

.hero-headline {
  font-weight: 800;
  font-size: clamp(40px, 7vw, 76px);
  line-height: 1.04;
  letter-spacing: -0.015em;
  margin-bottom: 20px;
  max-width: 760px;
}

.hero-role-line {
  font-size: clamp(15px, 1.8vw, 19px);
  color: var(--text-secondary);
  font-weight: 500;
  margin-bottom: 26px;
}

.hero-sub {
  font-size: 17px;
  color: var(--text-secondary);
  max-width: 700px;
  margin-bottom: 30px;
  line-height: 1.7;
}

.hero-sub strong { color: var(--text-primary); font-weight: 700; }

.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 36px; }

.btn {
  display: inline-block;
  padding: 13px 24px;
  font-size: 14.5px;
  font-weight: 700;
  border-radius: var(--radius);
  transition: all 0.18s ease;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--accent-gradient);
  color: #06170a;
}
.btn-primary:hover { filter: brightness(1.1); }

.btn-ghost {
  border-color: var(--border-bright);
  color: var(--text-primary);
  background: var(--bg-elevated);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

.hero-stack {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-elevated);
  padding: 18px 22px;
  max-width: 560px;
}

.stack-row {
  font-family: var(--font-mono);
  font-size: 13px;
  padding: 4px 0;
  color: var(--text-secondary);
}
.stack-row .stack-key { color: var(--accent); }
.stack-row .stack-arrow { color: var(--text-tertiary); margin: 0 8px; }

/* ===========================================================
   STATS + CAPABILITIES ("Signal")
   =========================================================== */
.signal {
  max-width: var(--container);
  margin: 0 auto;
  padding: clamp(50px, 8vw, 90px) clamp(20px, 5vw, 40px);
}

.signal-title {
  font-weight: 800;
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.15;
  letter-spacing: -0.01em;
  max-width: 640px;
  margin-bottom: 16px;
}

.signal-sub {
  color: var(--text-secondary);
  max-width: 600px;
  font-size: 15.5px;
  margin-bottom: 40px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 40px;
}

@media (max-width: 720px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

.stat-item {
  background: var(--bg-elevated);
  padding: 26px 22px;
}

.stat-value {
  font-weight: 800;
  font-size: clamp(26px, 3.4vw, 34px);
  color: var(--accent);
  margin-bottom: 6px;
}

.stat-label {
  font-size: 13px;
  color: var(--text-secondary);
}

.capabilities-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

@media (max-width: 860px) {
  .capabilities-grid { grid-template-columns: 1fr; }
}

.capability-card {
  background: var(--bg-elevated);
  padding: 28px 26px;
}

.capability-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.capability-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-tertiary);
}

.capability-tag {
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.04em;
}

.capability-title {
  font-weight: 700;
  font-size: 18px;
  margin-bottom: 10px;
}

.capability-description {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ===========================================================
   SECTION SHARED
   =========================================================== */
section.cases, section.log, section.toolkit, section.background-section, section.services, section.contact {
  max-width: var(--container);
  margin: 0 auto;
  padding: clamp(50px, 8vw, 90px) clamp(20px, 5vw, 40px);
}

.eyebrow {
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  margin-bottom: 14px;
}

.section-title {
  font-weight: 800;
  font-size: clamp(26px, 3.6vw, 38px);
  line-height: 1.2;
  max-width: 720px;
  letter-spacing: -0.01em;
}

.section-sub {
  color: var(--text-secondary);
  font-size: 15px;
  max-width: 620px;
  margin-top: 14px;
}

/* ===========================================================
   CASE STUDIES — preview grid (homepage), links to case-study.html
   =========================================================== */
.case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 40px;
}

@media (max-width: 960px) {
  .case-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 620px) {
  .case-grid { grid-template-columns: 1fr; }
}

.case-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.18s, transform 0.18s;
  display: flex;
  flex-direction: column;
}

.case-card:hover, .case-card:focus-visible {
  border-color: var(--accent-dim);
  transform: translateY(-3px);
}

.case-card-body {
  padding: 22px 22px 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.case-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--accent);
  margin-bottom: 12px;
}

.case-title {
  font-weight: 700;
  font-size: 18px;
  margin-bottom: 6px;
  line-height: 1.3;
}

.case-meta {
  font-size: 12.5px;
  color: var(--text-tertiary);
  margin-bottom: 12px;
}

.case-summary {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.6;
  margin-bottom: 16px;
  flex: 1;
}

.case-expand {
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
}

/* image placeholder — used in case card preview + full detail page */
.case-image-placeholder {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: var(--bg-elevated-2);
  border-bottom: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  color: var(--text-tertiary);
  text-align: center;
  padding: 16px;
  position: relative;
}
.case-image-placeholder img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.case-image-placeholder .ph-icon {
  font-size: 22px;
  opacity: 0.5;
}
.case-image-placeholder .ph-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.02em;
  max-width: 240px;
}
.case-image-caption {
  font-size: 11.5px;
  color: var(--text-tertiary);
  font-style: italic;
  padding: 8px 22px 0;
}

/* standalone variant: full-bleed in detail page, taller */
.case-detail .case-image-placeholder {
  border-radius: var(--radius);
  border: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  margin-bottom: 8px;
}

/* the diff block — small supporting element, used in detail page only */
.diff-block {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.9;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-elevated-2);
  margin: 8px 0;
}

.diff-line {
  padding: 7px 16px;
  border-left: 3px solid transparent;
  white-space: pre-wrap;
}

.diff-line.remove {
  background: var(--diff-remove-bg);
  border-left-color: var(--diff-remove);
  color: #d49a9a;
}
.diff-line.remove::before { content: "− "; color: var(--diff-remove); }

.diff-line.add {
  background: rgba(61, 220, 31, 0.07);
  border-left-color: var(--accent);
  color: #c9f0bd;
}
.diff-line.add::before { content: "+ "; color: var(--accent); }

/* ===========================================================
   CASE STUDY DETAIL PAGE (case-study.html?case=slug)
   =========================================================== */
.case-detail-wrap {
  max-width: 820px;
  margin: 0 auto;
  padding: clamp(40px, 6vw, 60px) clamp(20px, 5vw, 40px) 100px;
}

.case-detail-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13.5px;
  color: var(--text-secondary);
  margin-bottom: 30px;
  font-weight: 600;
}
.case-detail-back:hover { color: var(--accent); }

.case-detail .case-tag {
  margin-bottom: 16px;
}

.case-detail h1 {
  font-weight: 800;
  font-size: clamp(28px, 4.5vw, 42px);
  line-height: 1.15;
  margin-bottom: 10px;
}

.case-detail .case-detail-meta {
  font-size: 14px;
  color: var(--text-tertiary);
  margin-bottom: 28px;
}

.case-detail-section-label {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-top: 32px;
  margin-bottom: 14px;
}

.case-detail ul.detail-list li {
  padding: 8px 0 8px 22px;
  position: relative;
  font-size: 15.5px;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border);
  line-height: 1.6;
}
.case-detail ul.detail-list li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--accent);
}

.impact-row {
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
  margin-top: 14px;
}

.impact-stat .impact-value {
  font-weight: 800;
  font-size: 26px;
  color: var(--accent);
}
.impact-stat .impact-label {
  font-size: 13px;
  color: var(--text-secondary);
  max-width: 220px;
  margin-top: 2px;
}

.detail-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 6px;
}
.detail-tag {
  font-family: var(--font-mono);
  font-size: 12.5px;
  border: 1px solid var(--border-bright);
  color: var(--text-secondary);
  padding: 5px 12px;
  border-radius: 2px;
}

.case-nav {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 50px;
  padding-top: 28px;
  border-top: 1px solid var(--border);
}

.case-nav-link {
  font-size: 14px;
  color: var(--text-secondary);
  display: flex;
  flex-direction: column;
  gap: 4px;
  max-width: 45%;
}
.case-nav-link:hover { color: var(--accent); }
.case-nav-link .nav-direction {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--text-tertiary);
}
.case-nav-link.next { text-align: right; align-items: flex-end; }

/* ===========================================================
   WORK LOG (diff-style experience list)
   =========================================================== */
.log-list {
  margin-top: 40px;
  border-top: 1px solid var(--border);
}

.log-entry {
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
  display: grid;
  grid-template-columns: 190px 1fr;
  gap: 24px;
}

@media (max-width: 700px) {
  .log-entry { grid-template-columns: 1fr; gap: 10px; }
}

.log-meta {
  padding-top: 3px;
}

.log-period {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--accent);
  margin-bottom: 6px;
}

.log-tag {
  display: inline-block;
  font-size: 11.5px;
  font-family: var(--font-mono);
  border: 1px solid var(--border-bright);
  color: var(--text-tertiary);
  padding: 2px 8px;
  border-radius: 2px;
}

.log-role {
  font-weight: 700;
  font-size: 17px;
  color: var(--text-primary);
  margin-bottom: 2px;
}
.log-company {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 12px;
}

.log-bullet {
  font-size: 14.5px;
  padding: 5px 0 5px 18px;
  position: relative;
  color: var(--text-secondary);
  line-height: 1.6;
}
.log-bullet::before {
  content: "›";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}
.log-bullet strong { color: var(--text-primary); }

/* ===========================================================
   TOOLKIT
   =========================================================== */
.toolkit-grid {
  margin-top: 40px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px 36px;
}

@media (max-width: 760px) {
  .toolkit-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
  .toolkit-grid { grid-template-columns: 1fr; }
}

.toolkit-group-title {
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--accent);
  margin-bottom: 12px;
}

.toolkit-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.toolkit-tag {
  font-size: 13px;
  color: var(--text-secondary);
  border: 1px solid var(--border-bright);
  padding: 5px 12px;
  border-radius: 2px;
}

/* ===========================================================
   BACKGROUND — education, certifications, honours, publications
   =========================================================== */
.background-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  margin-top: 40px;
}

@media (max-width: 820px) {
  .background-grid { grid-template-columns: 1fr; gap: 40px; }
}

.bg-subsection-title {
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--accent);
  margin-bottom: 18px;
  margin-top: 30px;
}
.bg-subsection-title:first-child { margin-top: 0; }

.bg-item {
  margin-bottom: 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border);
}
.bg-item:last-child { border-bottom: none; }

.bg-item-title {
  font-weight: 700;
  font-size: 15px;
  color: var(--text-primary);
  margin-bottom: 3px;
}

.bg-item-link {
  display: block;
  text-decoration: none;
  transition: color 0.15s;
}
.bg-item-link:hover, .bg-item-link:focus-visible {
  color: var(--accent);
  text-decoration: underline;
}

.bg-item-meta {
  font-size: 13px;
  color: var(--text-secondary);
}

.bg-item-note {
  font-size: 12.5px;
  color: var(--accent);
  margin-top: 4px;
}

.bg-item-year {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-tertiary);
  float: right;
}

.bg-publication a {
  color: var(--accent);
  font-size: 13px;
}
.bg-publication a:hover { text-decoration: underline; }

/* ===========================================================
   SERVICES
   =========================================================== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  margin-top: 40px;
}

@media (max-width: 700px) {
  .services-grid { grid-template-columns: 1fr; }
}

.service-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 26px;
}

.service-title {
  font-weight: 700;
  font-size: 17px;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.service-title::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-gradient);
  flex-shrink: 0;
}

.service-description {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.65;
}

.service-rate {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.service-rate-base {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-tertiary);
  text-decoration: line-through;
}

.service-rate-final {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  color: var(--accent);
}

.services-pricing-note {
  margin-top: 18px;
  font-size: 13px;
  color: var(--text-tertiary);
  line-height: 1.6;
  max-width: 640px;
}

.services-cta {
  margin-top: 32px;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.services-cta-text {
  font-size: 14.5px;
  color: var(--text-secondary);
}

/* ===========================================================
   CONTACT / FOOTER
   =========================================================== */
.contact .section-title em {
  font-style: normal;
  color: var(--accent);
}

.contact-links {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-top: 30px;
}

@media (max-width: 700px) {
  .contact-links { grid-template-columns: repeat(2, 1fr); }
}

.contact-link {
  background: var(--bg-elevated);
  padding: 18px 20px;
  transition: background 0.15s;
}
.contact-link:hover { background: var(--bg-elevated-2); }

.contact-link-label {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-tertiary);
  letter-spacing: 0.04em;
  margin-bottom: 6px;
}

.contact-link-value {
  font-size: 14.5px;
  font-weight: 600;
  color: var(--text-primary);
}
.contact-link:hover .contact-link-value { color: var(--accent); }

.site-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  padding: 26px clamp(20px, 5vw, 40px);
  font-size: 12.5px;
  color: var(--text-tertiary);
  border-top: 1px solid var(--border);
  max-width: var(--container);
  margin: 0 auto;
}