/* Site Variables */
:root {
  /* Light mode (default) */
  --bg-primary: #fafafa;
  --bg-secondary: #f0f0f0;
  --bg-panel: #ffffff;
  --text-primary: #1a1a1a;
  --text-secondary: #4a4a4a;
  --text-muted: #6a6a6a;
  --border-color: #d0d0d0;
  --border-panel: #c0c0c0;
  --link-color: #0066cc;
  --link-hover: #004499;
  --accent: #2d6a4f;
  --accent-secondary: #40916c;
  --code-bg: #f5f5f5;
  --table-stripe: #f8f8f8;
  --shadow: rgba(0, 0, 0, 0.08);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-primary: #0d0d0d;
    --bg-secondary: #1a1a1a;
    --bg-panel: #141414;
    --text-primary: #e8e8e8;
    --text-secondary: #b0b0b0;
    --text-muted: #808080;
    --border-color: #333333;
    --border-panel: #404040;
    --link-color: #6db3f2;
    --link-hover: #9dd0ff;
    --accent: #40916c;
    --accent-secondary: #52b788;
    --code-bg: #1e1e1e;
    --table-stripe: #181818;
    --shadow: rgba(0, 0, 0, 0.3);
  }
}

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

html {
  font-size: 16px;
  line-height: 1.6;
}

body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  margin: 0 0 1rem 0;
  line-height: 1.3;
  font-weight: 600;
}

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; margin-top: 2rem; }
h3 { font-size: 1.25rem; margin-top: 1.5rem; }

p {
  margin: 0 0 1rem 0;
}

.muted {
  color: var(--text-muted);
  font-weight: 400;
}

a {
  color: var(--link-color);
  text-decoration: none;
}

a:hover {
  color: var(--link-hover);
  text-decoration: underline;
}

/* Layout */
.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header */
header {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.site-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  text-decoration: none;
}

.site-title:hover {
  color: var(--accent);
  text-decoration: none;
}

nav {
  display: flex;
  gap: 0.25rem;
  flex-wrap: wrap;
}

nav a {
  padding: 0.375rem 0.75rem;
  border-radius: 4px;
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: background-color 0.15s, color 0.15s;
}

nav a:hover {
  background: var(--bg-panel);
  color: var(--text-primary);
  text-decoration: none;
}

nav a.active {
  background: var(--accent);
  color: #ffffff;
}

/* Main content */
main {
  padding: 2rem 0 4rem 0;
}

/* Hero section */
.hero {
  margin-bottom: 3rem;
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

.hero .tagline {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.hero .intro {
  font-size: 1rem;
  max-width: 700px;
}

/* CTA buttons */
.cta-group {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
}

.cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  border-radius: 6px;
  font-weight: 500;
  font-size: 0.9375rem;
  transition: transform 0.1s, box-shadow 0.15s;
}

.cta-primary {
  background: var(--accent);
  color: #ffffff;
}

.cta-primary:hover {
  background: var(--accent-secondary);
  color: #ffffff;
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px var(--shadow);
}

.cta-secondary {
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
}

.cta-secondary:hover {
  background: var(--bg-secondary);
  text-decoration: none;
}

/* Section styling */
section {
  margin-bottom: 3rem;
}

section h2 {
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--border-color);
  margin-bottom: 1.5rem;
}

/* TUI Panel (evidence boxes) */
.panel {
  background: var(--bg-panel);
  border: 1px solid var(--border-panel);
  border-radius: 8px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: 0 2px 8px var(--shadow);
}

.panel-header {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
}

.panel h3 {
  margin-top: 0;
}

/* Proof links block */
.proof-links {
  background: var(--code-bg);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 1rem;
  margin: 1rem 0;
}

.proof-links h4 {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin: 0 0 0.75rem 0;
}

.proof-links ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.proof-links li {
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.proof-links li:last-child {
  margin-bottom: 0;
}

.proof-links a {
  word-break: break-word;
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
  font-size: 0.9375rem;
}

th, td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

th {
  background: var(--bg-secondary);
  font-weight: 600;
  white-space: nowrap;
}

tbody tr:nth-child(even) {
  background: var(--table-stripe);
}

td:last-child,
th:last-child {
  text-align: right;
}

/* Responsive tables */
.table-wrapper {
  overflow-x: auto;
  margin: 1rem 0;
}

/* Code and monospace */
code {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.875em;
  background: var(--code-bg);
  padding: 0.125rem 0.375rem;
  border-radius: 4px;
}

pre {
  background: var(--code-bg);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 1rem;
  overflow-x: auto;
  font-size: 0.875rem;
}

pre code {
  background: none;
  padding: 0;
}

/* Lists */
ul, ol {
  margin: 0 0 1rem 0;
  padding-left: 1.5rem;
}

li {
  margin-bottom: 0.5rem;
}

li:last-child {
  margin-bottom: 0;
}

/* Definition lists (for skills) */
dl {
  margin: 0 0 1rem 0;
}

dt {
  font-weight: 600;
  margin-bottom: 0.25rem;
}

dd {
  margin: 0 0 1rem 1rem;
  color: var(--text-secondary);
}

/* Project cards */
.project-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.project-card {
  background: var(--bg-panel);
  border: 1px solid var(--border-panel);
  border-radius: 8px;
  padding: 1.25rem;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.project-card:hover {
  border-color: var(--accent);
  box-shadow: 0 4px 12px var(--shadow);
}

.project-card h3 {
  margin: 0 0 0.5rem 0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.project-card h3 a {
  color: var(--text-primary);
}

.project-card h3 a:hover {
  color: var(--accent);
}

.project-card .stack {
  font-size: 0.8125rem;
  color: var(--text-muted);
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  margin-bottom: 0.5rem;
}

.project-card p {
  margin: 0;
  color: var(--text-secondary);
}

/* Icons */
.icon {
  width: 16px;
  height: 16px;
  vertical-align: middle;
  display: inline-block;
}

/* Screenshots / proof images */
.screenshot-figure {
  margin: 1rem 0;
  border: 1px solid var(--border-panel);
  border-radius: 8px;
  overflow: hidden;
  background: var(--bg-panel);
  box-shadow: 0 2px 8px var(--shadow);
}

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

.screenshot-caption {
  padding: 0.75rem 1rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-color);
}

/* Timeline */
.timeline {
  border-left: 2px solid var(--border-color);
  padding-left: 1.5rem;
  margin: 1.5rem 0;
}

.timeline-item {
  margin-bottom: 1.5rem;
  position: relative;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -1.625rem;
  top: 0.5rem;
  width: 10px;
  height: 10px;
  background: var(--accent);
  border-radius: 50%;
  border: 2px solid var(--bg-primary);
}

.timeline-date {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* Impact highlight */
.impact-highlight {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-secondary) 100%);
  color: #ffffff;
  border-radius: 8px;
  padding: 1.5rem;
  margin: 1.5rem 0;
}

.impact-highlight h3 {
  margin-top: 0;
  color: #ffffff;
}

/* Footer */
footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 2rem 0;
  margin-top: 4rem;
}

footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.footer-links a:hover {
  color: var(--text-primary);
}

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

/* Skills grid */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  margin: 1.5rem 0;
}

.skill-category {
  background: var(--bg-panel);
  border: 1px solid var(--border-panel);
  border-radius: 8px;
  padding: 1.25rem;
}

.skill-category h4 {
  margin: 0 0 0.75rem 0;
  font-size: 0.9375rem;
}

.skill-category p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

/* Contact page */
.contact-info {
  font-size: 1.125rem;
  margin: 2rem 0;
}

.contact-info a {
  font-weight: 500;
}

.contact-topics {
  background: var(--bg-panel);
  border: 1px solid var(--border-panel);
  border-radius: 8px;
  padding: 1.5rem;
  margin: 2rem 0;
}

.contact-topics h3 {
  margin-top: 0;
}

/* Print styles */
@media print {
  header, footer, nav, .cta-group {
    display: none;
  }

  body {
    background: #ffffff;
    color: #000000;
    font-size: 11pt;
  }

  .container {
    max-width: 100%;
    padding: 0;
  }

  main {
    padding: 0;
  }

  a {
    color: #000000;
    text-decoration: underline;
  }

  .panel, .project-card, .proof-links {
    border: 1px solid #cccccc;
    box-shadow: none;
    break-inside: avoid;
  }

  h1, h2, h3 {
    break-after: avoid;
  }

  table {
    font-size: 10pt;
  }
}

/* Resume page print optimization */
@media print {
  .resume-page h1 {
    font-size: 18pt;
    margin-bottom: 0.25rem;
  }

  .resume-page .tagline {
    font-size: 10pt;
    margin-bottom: 0.5rem;
  }

  .resume-page section {
    margin-bottom: 1rem;
  }

  .resume-page h2 {
    font-size: 12pt;
    margin-top: 0.75rem;
    margin-bottom: 0.5rem;
    padding-bottom: 0.25rem;
  }

  .resume-page ul {
    margin-bottom: 0.5rem;
  }

  .resume-page li {
    margin-bottom: 0.25rem;
  }
}

/* Mobile responsive */
@media (max-width: 768px) {
  header .container {
    flex-direction: column;
    align-items: flex-start;
  }

  nav {
    width: 100%;
  }

  nav a {
    padding: 0.5rem 0.625rem;
    font-size: 0.8125rem;
  }

  .hero h1 {
    font-size: 1.75rem;
  }

  .cta-group {
    flex-direction: column;
  }

  .cta {
    justify-content: center;
  }

  footer .container {
    flex-direction: column;
    text-align: center;
  }

  table {
    font-size: 0.8125rem;
  }

  th, td {
    padding: 0.5rem 0.75rem;
  }
}

/* Small mobile */
@media (max-width: 480px) {
  html {
    font-size: 15px;
  }

  .container {
    padding: 0 1rem;
  }

  nav a {
    padding: 0.375rem 0.5rem;
    font-size: 0.75rem;
  }
}