:root {
  --background: #0b1120;
  --surface: #111827;
  --surface-light: #1f2937;
  --border: #334155;

  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;

  --accent: #38bdf8;
  --accent-hover: #7dd3fc;

  --success: #34d399;

  --max-width: 1200px;
  --radius: 12px;
}

/* ------------------------------
   Base / Reset
------------------------------ */

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family:
    Inter,
    ui-sans-serif,
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;

  background: var(--background);
  color: var(--text-primary);
  line-height: 1.6;
}

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

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

/* ------------------------------
   Layout
------------------------------ */

.container {
  width: min(100% - 2rem, var(--max-width));
  margin-inline: auto;
}

.page-section {
  padding: 4rem 0;
}

.page-section--compact {
  padding: 2rem 0;
}

/* ------------------------------
   Header / Navigation
------------------------------ */

.site-header {
  border-bottom: 1px solid var(--border);
  background: rgba(11, 17, 32, 0.95);
}

.nav {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.brand {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

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

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

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

/* ------------------------------
   Typography
------------------------------ */

.eyebrow {
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

h1,
h2,
h3 {
  line-height: 1.2;
  margin-top: 0;
}

h1 {
  font-size: clamp(2.4rem, 6vw, 4.75rem);
  margin-bottom: 1rem;
}

h2 {
  font-size: clamp(1.7rem, 3vw, 2.5rem);
}

p {
  color: var(--text-secondary);
}

.lead {
  max-width: 720px;
  font-size: 1.15rem;
}

/* ------------------------------
   Buttons
------------------------------ */

.button-group {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0.75rem 1.2rem;

  border: 1px solid transparent;
  border-radius: 8px;

  font-weight: 600;
  cursor: pointer;
}

.button--primary {
  background: var(--accent);
  color: #082f49;
}

.button--primary:hover {
  background: var(--accent-hover);
}

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

.button--secondary:hover {
  border-color: var(--accent);
}

/* ------------------------------
   Cards / Grids
------------------------------ */

.grid {
  display: grid;
  gap: 1.25rem;
}

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

.card {
  padding: 1.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.card h3 {
  margin-bottom: 0.5rem;
}

.card p:last-child {
  margin-bottom: 0;
}

/* ------------------------------
   Hero
------------------------------ */

.hero {
  padding: 6rem 0 5rem;
}

.hero-content {
  max-width: 850px;
}

/* ------------------------------
   Access Page
------------------------------ */

.access-layout {
  min-height: calc(100vh - 73px);
  display: grid;
  place-items: center;
  padding: 3rem 1rem;
}

.access-card {
  width: min(100%, 520px);
  padding: 2rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.4rem;
  font-weight: 600;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.85rem 1rem;

  background: var(--background);
  color: var(--text-primary);

  border: 1px solid var(--border);
  border-radius: 8px;

  font: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.form-group textarea {
  resize: vertical;
}

.access-panel[hidden] {
  display: none;
}

.form-help {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.status-message {
  min-height: 1.5rem;
  margin-top: 1rem;
  font-size: 0.95rem;
}

/* ------------------------------
   Footer
------------------------------ */

.site-footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ------------------------------
   Architecture
------------------------------ */

.architecture-section {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.architecture-flow {
  display: grid;
  grid-template-columns:
    minmax(0, 1fr)
    auto
    minmax(0, 1fr)
    auto
    minmax(0, 1fr);

  align-items: center;
  gap: 1rem;
  margin-top: 2rem;
}

.architecture-node {
  min-height: 180px;
  padding: 1.5rem;

  border: 1px solid var(--border);
  border-radius: var(--radius);

  background: var(--background);
}

.architecture-node strong {
  display: block;
  margin-top: 0.35rem;
  font-size: 1.05rem;
}

.architecture-label {
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.architecture-arrow {
  color: var(--accent);
  font-size: 1.75rem;
  font-weight: 700;
}

.decision-list {
  display: grid;
  gap: 1rem;
  margin-top: 2rem;
}

.decision-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(250px, 0.6fr);
  gap: 2rem;

  padding: 1.5rem;

  border: 1px solid var(--border);
  border-radius: var(--radius);

  background: var(--surface);
}

.decision-item h3 {
  margin: 0.75rem 0 0;
}

.status-badge {
  display: inline-block;

  padding: 0.25rem 0.55rem;

  border: 1px solid var(--border);
  border-radius: 999px;

  font-size: 0.75rem;
  font-weight: 700;
}

.status-badge--accepted {
  color: var(--success);
}

.status-badge--proposed {
  color: var(--accent);
}

/* ------------------------------
   Lessons Learned
------------------------------ */

.lessons-list {
  display: grid;
  gap: 1rem;
}

.lesson {
  overflow: hidden;

  border: 1px solid var(--border);
  border-radius: var(--radius);

  background: var(--surface);
}

.lesson-toggle {
  width: 100%;

  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;

  padding: 1.25rem 1.5rem;

  background: transparent;
  color: var(--text-primary);

  border: 0;

  font: inherit;
  font-weight: 700;
  text-align: left;

  cursor: pointer;
}

.lesson-toggle:hover {
  background: var(--surface-light);
}

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

.lesson-icon {
  flex: 0 0 auto;

  color: var(--accent);
  font-size: 1.5rem;
  line-height: 1;
}

.lesson-content {
  padding: 0 1.5rem 1.5rem;
  border-top: 1px solid var(--border);
}

.lesson-content h3 {
  margin-top: 1.5rem;
  margin-bottom: 0.35rem;
}

.lesson-content[hidden] {
  display: none;
}

/* ------------------------------
   Resume
------------------------------ */

.resume-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 2rem;
}

.resume-actions {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  min-width: 230px;
}

.button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.resume-layout {
  display: grid;
  grid-template-columns: minmax(220px, 0.35fr) minmax(0, 1fr);
  gap: 3rem;
}

.resume-sidebar {
  border-right: 1px solid var(--border);
  padding-right: 2rem;
}

.resume-block + .resume-block {
  margin-top: 2.5rem;
}

.skill-list,
.simple-list {
  margin: 1rem 0 0;
  padding-left: 1.2rem;
  color: var(--text-secondary);
}

.skill-list {
  display: grid;
  gap: 0.45rem;
}

.experience-item {
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border);
}

.experience-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}

.experience-heading h2 {
  margin-bottom: 0.25rem;
  font-size: 1.4rem;
}

.experience-company {
  margin: 0;
  color: var(--accent);
  font-weight: 600;
}

.experience-date {
  color: var(--text-muted);
  white-space: nowrap;
}

.experience-item ul {
  color: var(--text-secondary);
  padding-left: 1.25rem;
}

/* ------------------------------
   Projects / Roadmap
------------------------------ */

.project-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem;
}

.project-card {
  padding: 1.5rem;

  border: 1px solid var(--border);
  border-radius: var(--radius);

  background: var(--surface);
}

.project-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.project-card h2 {
  font-size: 1.4rem;
}

.project-phase {
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 600;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;

  list-style: none;
  padding: 0;
  margin: 1.25rem 0 0;
}

.project-tech li {
  padding: 0.3rem 0.6rem;

  background: var(--background);
  border: 1px solid var(--border);
  border-radius: 999px;

  color: var(--text-secondary);
  font-size: 0.8rem;
}

.status-badge--completed {
  color: var(--success);
}

.status-badge--progress {
  color: var(--accent);
}

.status-badge--planned {
  color: var(--text-muted);
}

/* ------------------------------
   Homepage
------------------------------ */

.text-link {
  display: inline-block;
  margin-top: 0.75rem;

  color: var(--accent);
  font-weight: 600;
}

.text-link:hover,
.text-link:focus-visible {
  color: var(--accent-hover);
}

.platform-status {
  border-top: 1px solid var(--border);
  background: var(--surface);
}

.status-grid {
  display: grid;
  gap: 1rem;
  margin-top: 2rem;
}

.status-item {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr) auto;
  align-items: center;
  gap: 1rem;

  padding: 1.25rem 1.5rem;

  border: 1px solid var(--border);
  border-radius: var(--radius);

  background: var(--background);
}

.status-item strong {
  color: var(--accent);
}

/* ------------------------------
   Responsive
------------------------------ */

@media (max-width: 800px) {
  .nav {
    align-items: flex-start;
    flex-direction: column;
    padding: 1rem 0;
  }

  .grid--3 {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 4rem;
  }

    .architecture-flow {
    grid-template-columns: 1fr;
  }

  .architecture-arrow {
    transform: rotate(90deg);
    justify-self: center;
  }

  .decision-item {
    grid-template-columns: 1fr;
  }

    .resume-header {
    flex-direction: column;
  }

  .resume-actions {
    width: 100%;
  }

  .resume-layout {
    grid-template-columns: 1fr;
  }

  .resume-sidebar {
    border-right: 0;
    border-bottom: 1px solid var(--border);
    padding-right: 0;
    padding-bottom: 2rem;
  }

  .experience-heading {
    flex-direction: column;
  }
  
    .project-grid {
    grid-template-columns: 1fr;
  }

    .status-item {
    grid-template-columns: 1fr;
  }
}