/* Open IT Design — single-page site styles
   Light theme, brand blue #2E86C8, system font stack. No external deps. */

:root {
  --blue: #2E86C8;
  --blue-dark: #1F6396;
  --blue-soft: #EAF3FA;
  --blue-soft-2: #DCEBFA;
  --ink: #1A2A36;
  --ink-soft: #3A4B57;
  --muted: #5E6B75;
  --line: #E2E8EE;
  --bg: #FFFFFF;
  --bg-alt: #F6F9FC;
  --maxw: 1100px;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 3px rgba(26, 42, 54, .06), 0 4px 16px rgba(26, 42, 54, .04);
  --focus: 2px solid var(--blue);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Visible, consistent focus states */
a:focus-visible, button:focus-visible, [tabindex]:focus-visible {
  outline: var(--focus);
  outline-offset: 2px;
  border-radius: 4px;
}

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* Skip link */
.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--blue);
  color: #fff;
  padding: 10px 16px;
  border-radius: 0 0 8px 0;
  z-index: 1000;
  font-weight: 600;
}
.skip-link:focus { left: 0; color: #fff; text-decoration: none; }

/* Header / nav */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: saturate(180%) blur(8px);
  -webkit-backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--line);
}
.nav-wrap {
  display: flex;
  align-items: center;
  gap: 20px;
  min-height: 64px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -0.01em;
  text-decoration: none;
}
.brand:hover { text-decoration: none; }
.brand-mark { flex: 0 0 auto; }
.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  margin-left: auto;
}
.nav-list {
  list-style: none;
  display: flex;
  gap: 24px;
  margin: 0;
  padding: 0;
}
.nav-list a {
  color: var(--ink-soft);
  font-weight: 500;
  font-size: 15px;
  text-decoration: none;
  padding: 6px 0;
}
.nav-list a:hover, .nav-list a.active { color: var(--blue); text-decoration: none; }
.nav-cta { flex: 0 0 auto; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font: inherit;
  font-weight: 600;
  font-size: 15px;
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background .15s ease, color .15s ease, border-color .15s ease;
  white-space: nowrap;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--blue); color: #fff; }
.btn-primary:hover { background: var(--blue-dark); }
.btn-ghost { background: transparent; color: var(--blue); border-color: var(--blue-soft-2); }
.btn-ghost:hover { background: var(--blue-soft); }
.btn-lg { font-size: 17px; padding: 14px 26px; border-radius: var(--radius); }

/* Mobile menu toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  margin-left: auto;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  cursor: pointer;
}
.menu-bar { display: block; height: 2px; width: 100%; background: var(--ink); border-radius: 2px; }

/* Hero */
.hero { background: linear-gradient(180deg, var(--blue-soft) 0%, #fff 100%); border-bottom: 1px solid var(--line); }
.hero-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 72px 24px 64px;
  gap: 20px;
}
.hero-wordmark { max-width: 360px; width: 100%; }
.hero-title {
  font-size: clamp(28px, 5vw, 44px);
  margin: 8px 0 0;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.1;
  max-width: 18ch;
}
.hero-sub {
  font-size: clamp(17px, 2.2vw, 20px);
  color: var(--ink-soft);
  max-width: 60ch;
  margin: 0;
}
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; justify-content: center; margin-top: 8px; }

/* Sections */
.section { padding: 72px 0; }
.section-alt { background: var(--bg-alt); }
.section-title {
  font-size: clamp(24px, 3.5vw, 32px);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 18px;
  color: var(--ink);
}
.section-lede {
  color: var(--ink-soft);
  max-width: 65ch;
  margin: 0 0 32px;
  font-size: 18px;
}
.section-cta { margin-top: 36px; text-align: center; }

/* About */
.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 320px) 1fr;
  gap: 48px;
  align-items: center;
}
.about-photo img {
  width: 100%;
  max-width: 320px;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin: 0 auto;
}
.about-body p { margin: 0 0 16px; color: var(--ink-soft); }
.about-body p:last-child { margin-bottom: 0; }

/* Card grid (services) */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}
.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 24px;
  box-shadow: var(--shadow);
}
.card h3 { font-size: 19px; margin: 0 0 10px; color: var(--ink); }
.card p { margin: 0; color: var(--ink-soft); font-size: 16px; }
.card-wide { grid-column: span 1; }

/* Tech grid */
.tech-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 12px;
}
.tech-grid li {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  text-align: center;
  font-weight: 600;
  color: var(--ink-soft);
  font-size: 15px;
}

/* Who I help */
.help-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 48px;
  align-items: center;
}
.help-body p { margin: 0 0 16px; color: var(--ink-soft); }
.help-body p:last-child { margin-bottom: 0; }
.help-stats { display: flex; flex-direction: column; gap: 18px; }
.stat {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 22px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.stat-num { font-size: 24px; font-weight: 800; color: var(--blue); letter-spacing: -0.01em; }
.stat-label { font-size: 14px; color: var(--muted); }

/* How it works */
.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
  counter-reset: step;
}
.step {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 26px;
  box-shadow: var(--shadow);
}
.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--blue);
  color: #fff;
  font-weight: 700;
  margin-bottom: 14px;
}
.step h3 { margin: 0 0 8px; font-size: 19px; }
.step p { margin: 0; color: var(--ink-soft); }

/* Contact */
.contact-inner { text-align: center; max-width: 720px; }
.contact-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
  margin-top: 24px;
}

/* Footer */
.site-footer { background: var(--ink); color: #cdd6de; padding: 32px 0; }
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.footer-brand { display: flex; align-items: center; gap: 10px; font-size: 14px; }
.site-footer a { color: #fff; font-size: 14px; }
.site-footer nav { display: flex; gap: 20px; }

/* Responsive */
@media (max-width: 860px) {
  .menu-toggle { display: flex; }
  .main-nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: #fff;
    border-bottom: 1px solid var(--line);
    padding: 8px 24px 20px;
    margin: 0;
    box-shadow: var(--shadow);
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: transform .18s ease, opacity .18s ease;
  }
  .main-nav.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .nav-list {
    flex-direction: column;
    gap: 0;
    border-bottom: 1px solid var(--line);
    margin-bottom: 14px;
  }
  .nav-list li { border-bottom: 1px solid var(--line); }
  .nav-list li:last-child { border-bottom: none; }
  .nav-list a { display: block; padding: 14px 4px; }
  .nav-cta { width: 100%; margin-bottom: 4px; }
}

@media (max-width: 720px) {
  .about-grid { grid-template-columns: 1fr; gap: 32px; }
  .help-grid { grid-template-columns: 1fr; gap: 32px; }
  .section { padding: 56px 0; }
  .hero-inner { padding: 56px 20px 48px; }
  body { font-size: 16px; }
}

/* Reduce motion */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; animation: none !important; }
}

/* ==========================================================================
   Dark theme (Tokyo Night-inspired) — applied via <html data-theme="dark">.
   Base theme is light; these rules only override what changes.
   ========================================================================== */

:root[data-theme="dark"] {
  --blue: #7AA2F7;
  --blue-dark: #5F87E0;
  --blue-soft: #1F2440;
  --blue-soft-2: #3B4261;
  --ink: #C0CAF5;
  --ink-soft: #A9B1D6;
  --muted: #7982A9;
  --line: #292E42;
  --bg: #1A1B26;
  --bg-alt: #16161E;
  --shadow: 0 1px 3px rgba(0, 0, 0, .35), 0 4px 16px rgba(0, 0, 0, .25);
}

:root[data-theme="dark"] .site-header { background: rgba(26, 27, 38, .88); }
:root[data-theme="dark"] .hero { background: linear-gradient(180deg, #1F2440 0%, var(--bg) 100%); }
:root[data-theme="dark"] .card,
:root[data-theme="dark"] .tech-grid li,
:root[data-theme="dark"] .stat,
:root[data-theme="dark"] .step { background: #1F2335; }
:root[data-theme="dark"] .btn-primary { color: #16161E; }
:root[data-theme="dark"] .btn-primary:hover { color: #16161E; }
:root[data-theme="dark"] .site-footer { background: #13141C; color: #9AA3C0; }

@media (max-width: 860px) {
  :root[data-theme="dark"] .main-nav { background: var(--bg); }
}

/* Theme toggle button */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  color: var(--ink-soft);
  cursor: pointer;
  flex: 0 0 auto;
  transition: color .15s ease, border-color .15s ease;
}
.theme-toggle:hover { color: var(--blue); border-color: var(--blue-soft-2); }
.theme-toggle .icon-sun { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

/* Wordmark swap: dark-navy wordmark for light theme, lavender for dark */
.wordmark-for-dark { display: none; }
:root[data-theme="dark"] .wordmark-for-light { display: none; }
:root[data-theme="dark"] .wordmark-for-dark { display: block; }