:root {
  --bg: #fbfcfd;
  --surface: #ffffff;
  --surface-strong: #f3f7f9;
  --text: #182026;
  --muted: #5a6873;
  --soft: #7b8994;
  --line: #dbe4ea;
  --line-strong: #c5d2dc;
  --blue: #1f5f8b;
  --blue-dark: #143f63;
  --teal: #1b8a84;
  --amber: #b56a2a;
  --shadow: 0 22px 60px rgba(24, 32, 38, 0.10);
  --radius: 8px;
  --max: 1160px;
  --font: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

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

a {
  color: inherit;
}

.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  z-index: 1000;
  padding: 0.75rem 1rem;
  background: var(--text);
  color: var(--surface);
  text-decoration: none;
}

.skip-link:focus {
  top: 1rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid rgba(219, 228, 234, 0.85);
  background: rgba(251, 252, 253, 0.92);
  backdrop-filter: blur(18px);
}

.container {
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
}

.nav-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  min-height: 74px;
}

.brand {
  display: inline-flex;
  flex-direction: column;
  gap: 0.08rem;
  text-decoration: none;
}

.brand strong {
  font-size: 1rem;
  letter-spacing: 0;
}

.brand span {
  font-size: 0.75rem;
  color: var(--muted);
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
}

.nav-toggle span,
.nav-toggle::before,
.nav-toggle::after {
  content: "";
  display: block;
  width: 18px;
  height: 2px;
  background: currentColor;
  position: absolute;
}

.nav-toggle span {
  transform: translateY(0);
}

.nav-toggle::before {
  transform: translateY(-6px);
}

.nav-toggle::after {
  transform: translateY(6px);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 1.3rem;
}

.nav-menu a {
  color: var(--muted);
  font-size: 0.92rem;
  text-decoration: none;
}

.nav-menu a:hover,
.nav-menu a[aria-current="page"] {
  color: var(--text);
}

.nav-menu .nav-cta,
.nav-menu .nav-cta[aria-current="page"] {
  color: var(--surface);
  background: var(--text);
  padding: 0.65rem 0.95rem;
  border-radius: var(--radius);
}

.hero {
  padding: 3.4rem 0 2.9rem;
  border-bottom: 1px solid var(--line);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(320px, 0.72fr);
  gap: 3rem;
  align-items: center;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 0.9rem;
  max-width: none;
  white-space: nowrap;
  font-size: clamp(2.75rem, 4.8vw, 4.25rem);
  line-height: 1.03;
  letter-spacing: 0;
}

.hero-subtitle {
  max-width: 760px;
  margin-bottom: 1.1rem;
  font-size: clamp(1.02rem, 1.3vw, 1.25rem);
  line-height: 1.25;
  font-weight: 600;
  letter-spacing: 0;
}

.hero-copy {
  max-width: 680px;
  color: var(--muted);
  font-size: 1.1rem;
}

.hero-actions,
.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.4rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.72rem 1rem;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  color: var(--text);
  background: var(--surface);
  font-size: 0.95rem;
  font-weight: 700;
  text-decoration: none;
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease;
}

.button:hover {
  transform: translateY(-1px);
  border-color: var(--blue);
}

.button.primary {
  border-color: var(--text);
  background: var(--text);
  color: var(--surface);
}

.button.blue {
  border-color: var(--blue);
  background: var(--blue);
  color: var(--surface);
}

.button.ghost {
  background: transparent;
}

.proof-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.proof-panel img {
  aspect-ratio: 16 / 10;
  width: 100%;
  object-fit: cover;
  object-position: top left;
}

.proof-panel figcaption {
  padding: 1rem;
  color: var(--muted);
  font-size: 0.88rem;
}

.proof-panel figcaption strong {
  display: block;
  margin-bottom: 0.25rem;
  color: var(--text);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.skills-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0;
  margin: 1.35rem 0 0;
  list-style: none;
}

.skills-strip li,
.project-label,
.evidence-status {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
}

.skills-strip li {
  padding: 0.34rem 0.58rem;
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 700;
}

.section {
  padding: 5.5rem 0;
}

.section.compact {
  padding: 3.5rem 0;
}

.section.tinted {
  background: var(--surface-strong);
  border-block: 1px solid var(--line);
}

.section-head {
  display: grid;
  grid-template-columns: minmax(0, 0.7fr) minmax(0, 1fr);
  gap: 2rem;
  align-items: end;
  margin-bottom: 2.5rem;
}

.section-head h2,
.page-title h1 {
  margin-bottom: 0;
  font-size: clamp(2.2rem, 4vw, 4.25rem);
  line-height: 1;
  letter-spacing: 0;
}

.section-head p,
.page-title p {
  color: var(--muted);
  font-size: 1.05rem;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.project-card {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
  min-height: 330px;
  padding: 1.2rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  text-decoration: none;
}

.project-card.featured {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(320px, 1.2fr);
  gap: 1.5rem;
  min-height: 420px;
}

.project-card.featured > div {
  display: flex;
  flex-direction: column;
}

.project-card.featured .project-meta {
  margin-top: 1.25rem;
}

.project-card h2,
.project-card h3 {
  margin-bottom: 0.75rem;
  font-size: clamp(1.6rem, 2.6vw, 3rem);
  line-height: 1;
  letter-spacing: 0;
}

.project-card:not(.featured) h2,
.project-card:not(.featured) h3 {
  font-size: 1.55rem;
}

.project-card p {
  color: var(--muted);
}

.project-label {
  display: inline-flex;
  width: fit-content;
  margin-bottom: 0.85rem;
  padding: 0.36rem 0.58rem;
  color: var(--blue-dark);
  background: rgba(31, 95, 139, 0.08);
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.evidence-status {
  display: inline-flex;
  width: fit-content;
  margin: 0.35rem 0 0;
  padding: 0.48rem 0.64rem;
  color: var(--muted);
  background: var(--surface-strong);
  font-size: 0.84rem;
}

.project-meta,
.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0;
  margin: auto 0 0;
  list-style: none;
}

.project-meta li,
.tag-list li {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.38rem 0.62rem;
  color: var(--muted);
  background: var(--bg);
  font-size: 0.82rem;
}

.media-frame {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: #0f1720;
}

.media-frame img {
  width: 100%;
  height: 100%;
  min-height: 260px;
  object-fit: cover;
  object-position: top left;
}

.evidence-visual {
  display: grid;
  gap: 0.7rem;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, #ffffff 0%, #f5f8fa 100%);
}

.evidence-row {
  display: grid;
  grid-template-columns: 120px 1fr 72px;
  gap: 0.7rem;
  align-items: center;
  padding: 0.7rem;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
}

.evidence-row span {
  min-height: 12px;
  border-radius: 999px;
  background: var(--line);
}

.evidence-row span:nth-child(2) {
  background: rgba(31, 95, 139, 0.18);
}

.evidence-row span:nth-child(3) {
  background: rgba(27, 138, 132, 0.24);
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.76fr) minmax(0, 1fr);
  gap: 3rem;
  align-items: start;
}

.stack {
  display: grid;
  gap: 1.2rem;
}

.callout {
  padding: 1.25rem;
  border-left: 4px solid var(--teal);
  background: var(--surface);
  color: var(--muted);
}

.content-list {
  display: grid;
  gap: 0.85rem;
  padding-left: 1.1rem;
  color: var(--muted);
}

.page-title {
  padding: 5rem 0 3rem;
  border-bottom: 1px solid var(--line);
}

.page-title h1 {
  max-width: 900px;
  margin-bottom: 1.1rem;
  white-space: normal;
  overflow-wrap: anywhere;
}

.page-title .project-summary {
  max-width: 820px;
  font-size: 1.2rem;
}

.case-study-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.7fr) minmax(0, 1fr);
  gap: 3rem;
  align-items: start;
}

.case-study-grid h2 {
  position: sticky;
  top: 100px;
  margin-bottom: 0;
  font-size: clamp(1.8rem, 3vw, 3rem);
  line-height: 1;
}

.text-block {
  display: grid;
  gap: 1.25rem;
}

.text-block p {
  color: var(--muted);
}

.architecture {
  display: grid;
  gap: 0.75rem;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.arch-node {
  padding: 0.9rem 1rem;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--bg);
  font-weight: 700;
}

.arch-node small {
  display: block;
  margin-top: 0.25rem;
  color: var(--muted);
  font-weight: 500;
}

.arch-arrow {
  color: var(--blue);
  font-size: 1.35rem;
  line-height: 1;
  text-align: center;
}

.screenshot-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.screenshot-grid figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  overflow: hidden;
}

.screenshot-grid img {
  aspect-ratio: 16 / 10;
  width: 100%;
  object-fit: cover;
  object-position: top left;
}

.screenshot-grid figcaption {
  padding: 0.85rem;
  color: var(--muted);
  font-size: 0.88rem;
}

.results-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.metric {
  padding: 1.2rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.metric strong {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 1.5rem;
  line-height: 1;
}

.metric span {
  color: var(--muted);
  font-size: 0.92rem;
}

.simple-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.simple-card {
  padding: 1.2rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.simple-card h3 {
  margin-bottom: 0.6rem;
  font-size: 1.25rem;
}

.simple-card h2 {
  margin-bottom: 0.6rem;
  font-size: 1.25rem;
  line-height: 1.15;
}

.simple-card p {
  color: var(--muted);
}

.site-footer {
  padding: 2rem 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer-inner a {
  color: var(--text);
  text-decoration: none;
}

@media (max-width: 900px) {
  .nav-toggle {
    display: inline-flex;
    position: relative;
  }

  .nav-menu {
    display: none;
    position: absolute;
    top: 74px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 0.75rem 20px 1rem;
    border-bottom: 1px solid var(--line);
    background: var(--surface);
  }

  .nav-menu[data-open] {
    display: flex;
  }

  .nav-menu a {
    width: 100%;
    padding: 0.85rem 0;
  }

  .nav-menu .nav-cta {
    width: auto;
    margin-top: 0.5rem;
    padding: 0.7rem 0.95rem;
  }

  .hero {
    padding: 2.9rem 0 2.5rem;
  }

  .hero-grid,
  .section-head,
  .split,
  .case-study-grid,
  .project-card.featured {
    grid-template-columns: 1fr;
  }

  .case-study-grid h2 {
    position: static;
  }

  .project-grid,
  .screenshot-grid,
  .results-grid,
  .simple-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .container {
    width: min(100% - 28px, var(--max));
  }

  h1 {
    max-width: none;
    font-size: clamp(1.6rem, 9vw, 3.2rem);
  }

  .section,
  .section.compact {
    padding: 3.25rem 0;
  }

  .project-card {
    min-height: auto;
  }

  .hero-actions,
  .button-row {
    align-items: stretch;
    flex-direction: column;
  }

  .button {
    width: 100%;
  }
}