:root{
  --font: 'Segoe UI', -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  --mono: 'SF Mono', 'Consolas', 'Menlo', monospace;
  --maxw: 1080px;
  --radius: 16px;
  /* --accent is a BRAND/SURFACE colour: backgrounds, borders, gradients, glows.
     --accent-text is the AA-safe variant for anything rendered as text.
     Never use --accent as a text colour. */
  --accent: #2dd4bf;
  --accent-dark: #14b8a6;
}

/* DARK THEME (default) */
html[data-theme="dark"]{
  --bg: #070c12;
  --bg-alt: #0b131c;
  --surface: #0e1822;
  --surface-2: #121e2a;
  --border: rgba(255,255,255,0.09);
  --text: #eef2f6;
  --text-soft: rgba(238,242,246,0.62);   /* 6.99:1 on --bg */
  --text-faint: rgba(238,242,246,0.6);   /* 6.59:1 on --bg — was 0.4 (3.49:1, failed AA) */
  --accent-text: #2dd4bf;                /* 10.54:1 on --bg */
  --focus: #2dd4bf;
  --shadow: 0 24px 48px -20px rgba(0,0,0,0.55);
  --nav-bg: rgba(7, 12, 18, 0.72);
}

/* LIGHT THEME */
html[data-theme="light"]{
  --bg: #f6f8fa;
  --bg-alt: #eef1f5;
  --surface: #ffffff;
  --surface-2: #f2f5f8;
  --border: #e2e6ec;
  --text: #121826;
  --text-soft: #55677a;                  /* 5.47:1 on --bg */
  --text-faint: #5a6875;                 /* 5.37:1 on --bg — was #8b97a5 (2.79:1, failed AA) */
  --accent-text: #0a7268;                /* 5.45:1 on --bg, 5.80:1 on --surface */
  --focus: #0a7268;
  --shadow: 0 20px 40px -20px rgba(15,30,46,0.2);
  --nav-bg: rgba(246, 248, 250, 0.75);
  --accent-dark: #0e8f83;
}

*, *::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;
  -webkit-font-smoothing: antialiased;
  transition: background 0.3s ease, color 0.3s ease;
  overflow-x: hidden;
}
img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }
ul{ margin:0; padding:0; }
h1,h2,h3,h4{ margin:0; font-weight: 800; letter-spacing:-0.01em; }
em{ font-style: italic; color: var(--accent-text); font-weight: 800; }

/* FOCUS VISIBILITY (keyboard navigation)
   :focus-visible only paints the ring for keyboard users, not mouse clicks. */
/* Only suppress the default ring where :focus-visible is actually supported,
   so older browsers keep their native focus outline. */
@supports selector(:focus-visible){
  :focus{ outline: none; }
}
:focus-visible{
  outline: 3px solid var(--focus);
  outline-offset: 3px;
  border-radius: 6px;
}
.nav-links a:focus-visible,
.nav-brand:focus-visible{ outline-offset: 6px; }
.btn:focus-visible,
.nav-cta:focus-visible{ outline-offset: 4px; }
.theme-toggle:focus-visible,
.nav-toggle:focus-visible{ outline-offset: 4px; border-radius: 50%; }
.contact-link:focus-visible{ outline-offset: 4px; border-radius: var(--radius); }
/* Keyboard focus mirrors the hover affordance on interactive cards */
.contact-link:focus-visible{ transform: translateY(-4px); border-color: var(--accent); }
.nav-links a:focus-visible::after{ width: 100%; }

/* Skip link — first tab stop, lets keyboard users jump past the nav */
.skip-link{
  position: absolute; left: 50%; top: 0; transform: translate(-50%, -120%);
  z-index: 1100; background: var(--accent); color: #06231f;
  font-weight: 700; font-size: 0.9rem; padding: 12px 22px;
  border-radius: 0 0 10px 10px;
  transition: transform 0.2s ease;
}
.skip-link:focus-visible{ transform: translate(-50%, 0); outline-offset: -3px; }

.container{ max-width: var(--maxw); margin: 0 auto; padding: 0 28px; position: relative; z-index: 1; }

/* Background dotted grid */
.bg-dots{
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse 80% 55% at 50% 0%, black 0%, transparent 75%);
  opacity: 0.6;
}
.bg-dots .dot{
  position: absolute;
  width: 4px; height: 4px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.5;
  animation: floaty 6s ease-in-out infinite;
}
@keyframes floaty{
  0%, 100%{ transform: translateY(0); opacity: 0.35; }
  50%{ transform: translateY(-14px); opacity: 0.8; }
}

/* progress bar */
.progress-bar{
  position: fixed; top:0; left:0; height: 3px; width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--accent-dark));
  z-index: 1000;
  transition: width 0.1s ease-out;
}

/* NAV */
.nav{
  position: fixed; top:0; left:0; right:0; z-index: 900;
  transition: background 0.3s ease, backdrop-filter 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
  border-bottom: 1px solid transparent;
}
.nav.scrolled{
  background: var(--nav-bg);
  backdrop-filter: blur(12px);
  border-bottom-color: var(--border);
}
.nav-inner{
  max-width: var(--maxw); margin: 0 auto; padding: 18px 28px;
  display:flex; align-items:center; justify-content:space-between; gap: 24px;
}
.nav-brand{ font-weight: 800; font-size: 1.1rem; color: var(--text); }
.nav-brand .dot{ color: var(--accent-text); }
.nav-links{ display:flex; gap: 26px; flex: 1; justify-content: center; }
.nav-links a{
  color: var(--text-soft); font-size: 0.88rem; font-weight: 600;
  position: relative; padding: 4px 0; transition: color 0.2s ease;
}
.nav-links a:hover{ color: var(--text); }
.nav-links a::after{
  content:''; position:absolute; left:0; bottom:-2px; width:0; height:2px;
  background: var(--accent); transition: width 0.25s ease;
}
.nav-links a:hover::after{ width: 100%; }
.nav-right{ display:flex; align-items:center; gap: 14px; }
.theme-toggle{
  width: 38px; height: 38px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--surface);
  cursor: pointer;
  display:flex; align-items:center; justify-content:center;
  font-size: 1rem;
  transition: transform 0.2s ease, border-color 0.2s ease;
}
.theme-toggle:hover{ transform: rotate(15deg); border-color: var(--accent); }
.nav-cta{
  background: var(--accent); color: #06231f; font-weight: 700; font-size: 0.86rem;
  padding: 9px 18px; border-radius: 999px;
  transition: transform 0.2s ease, background 0.2s ease;
  white-space: nowrap;
}
.nav-cta:hover{ background: #4be0cd; transform: translateY(-1px); }
.nav-toggle{
  display:none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 6px;
}
.nav-toggle span{ width: 22px; height: 2px; background: var(--text); border-radius: 2px; transition: 0.25s ease; }

/* HERO */
.hero{
  position: relative; min-height: 100vh; display:flex; align-items:center;
  padding-top: 100px; overflow: hidden;
}
.hero-glow{
  position:absolute; inset:0; z-index:0;
  background: radial-gradient(900px 500px at 75% 0%, rgba(45,212,191,0.14), transparent 60%);
}
.hero-inner{ padding-top: 20px; padding-bottom: 50px; }
.eyebrow{
  color: var(--accent-text); font-weight: 700; font-size: 0.8rem; text-transform: uppercase;
  letter-spacing: 0.16em; margin: 0 0 20px; font-family: var(--mono);
}
.hero h1{
  font-size: clamp(2.3rem, 6vw, 4rem); line-height: 1.1; margin-bottom: 20px; color: var(--text);
}
.hero-sub{
  color: var(--text-soft); font-size: 1.08rem; max-width: 600px; margin: 0 0 36px;
}
.hero-actions{ display:flex; gap:16px; flex-wrap: wrap; margin-bottom: 56px; }
.btn{
  display:inline-flex; align-items:center; justify-content:center; padding: 13px 26px;
  border-radius: 999px; font-weight: 700; font-size: 0.95rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, color 0.2s ease;
  border: 1px solid transparent;
}
.btn-primary{ background: var(--accent); color: #06231f; }
.btn-primary:hover{ background:#4be0cd; transform: translateY(-2px); box-shadow: 0 14px 28px -10px rgba(45,212,191,0.5); }
.btn-ghost{ border-color: var(--border); color: var(--text); }
.btn-ghost:hover{ background: var(--surface); transform: translateY(-2px); }

.hero-stats{
  display:grid; grid-template-columns: repeat(3, auto); gap: 48px;
  border-top: 1px solid var(--border); padding-top: 30px; margin-bottom: 26px;
}
.stat-num{ font-size: 2rem; font-weight: 800; color: var(--text); }
.stat-suffix{ font-size: 1.2rem; font-weight: 800; color: var(--accent-text); }
.stat-label{ color: var(--text-faint); font-size: 0.8rem; font-weight: 600; margin: 4px 0 0; text-transform: uppercase; letter-spacing: 0.04em; }
.hero-badge{
  display:inline-flex; flex-direction: column; gap: 2px;
  border: 1px solid var(--border); border-radius: 12px; padding: 10px 18px;
  background: var(--surface);
}
.badge-title{ font-weight: 800; color: var(--text); font-size: 0.95rem; }
.badge-sub{ color: var(--text-faint); font-size: 0.72rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; }

.scroll-cue{
  position:absolute; bottom: 26px; left: 50%; transform: translateX(-50%);
  width: 26px; height: 42px; border: 2px solid var(--border); border-radius: 14px; z-index: 2;
}
.scroll-cue span{
  position:absolute; top: 7px; left: 50%; width: 4px; height: 8px; background: var(--accent);
  border-radius: 2px; transform: translateX(-50%); animation: scrollcue 1.8s ease-in-out infinite;
}
@keyframes scrollcue{ 0%{ opacity:1; top:7px; } 70%{ opacity:0; top:22px; } 100%{ opacity:0; top:7px; } }

/* SECTIONS */
.section{ padding: 100px 0; position: relative; }
.section-alt{ background: var(--bg-alt); }
.section-dark{ background: var(--surface-2); }
.section-tag{
  color: var(--accent-text); font-weight: 700; font-size: 0.78rem; text-transform: uppercase;
  letter-spacing: 0.16em; margin: 0 0 12px; font-family: var(--mono);
}
.section-title{ font-size: clamp(1.7rem, 3.4vw, 2.5rem); color: var(--text); margin-bottom: 20px; }
.section-lead{ color: var(--text-soft); font-size: 1.05rem; max-width: 560px; margin: 0 0 40px; }

/* ABOUT */
.about-grid{ display:grid; grid-template-columns: 1fr 1fr; gap: 32px; margin: 30px 0 32px; }
.about-text{ color: var(--text-soft); font-size: 1.03rem; }
.about-text strong{ color: var(--text); }
.pill-row{ display:flex; flex-wrap: wrap; gap: 10px; }
.pill{
  background: var(--surface); border: 1px solid var(--border); color: var(--text);
  font-size: 0.85rem; font-weight: 600; padding: 9px 16px; border-radius: 999px;
}

/* CARDS GRID (What I Do) */
.cards-grid{ display:grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.do-card{
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 28px; transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}
.do-card:hover{ transform: translateY(-4px); box-shadow: var(--shadow); border-color: var(--accent); }
.do-icon{ font-size: 1.8rem; margin-bottom: 14px; }
.do-card h3{ font-size: 1.1rem; color: var(--text); margin-bottom: 10px; }
.do-card p{ color: var(--text-soft); font-size: 0.94rem; margin: 0 0 16px; }
.tag-row{ display:flex; flex-wrap: wrap; gap: 8px; }
.tag{
  background: rgba(45,212,191,0.12); color: var(--accent-text); font-size: 0.78rem;
  font-weight: 600; padding: 6px 12px; border-radius: 8px;
}

/* IMPACT */
.impact-grid{ display:grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.impact-card{
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 30px; text-align:center;
}
.impact-num{ font-size: 2.6rem; font-weight: 800; color: var(--accent-text); }
.impact-suffix{ font-size: 1.6rem; font-weight: 800; color: var(--accent-text); }
.impact-text{ font-size: 1.8rem; font-weight: 800; color: var(--accent-text); }
.impact-card p{ color: var(--text-soft); font-size: 0.88rem; font-weight: 600; margin: 8px 0 0; }

/* PARTNERS */
.section-partners{ padding: 60px 0; }
.partners-label{
  text-align:center; color: var(--text-faint); font-size: 0.78rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.16em; margin-bottom: 24px; font-family: var(--mono);
}
.partners-row{ display:flex; justify-content:center; flex-wrap: wrap; gap: 40px; }
.partner{ color: var(--text-soft); font-weight: 800; font-size: 1.15rem; opacity: 0.7; transition: opacity 0.2s ease, color 0.2s ease; }
.partner:hover{ opacity: 1; color: var(--accent-text); }

/* JOURNEY */
.journey{ display:grid; gap: 20px; }
.jn-card{
  display:grid; grid-template-columns: 200px 1fr; gap: 28px;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 30px; transition: border-color 0.25s ease, transform 0.25s ease;
}
.jn-card:hover{ border-color: var(--accent); transform: translateY(-2px); }
.jn-year{
  color: var(--accent-text); font-weight: 700; font-family: var(--mono); font-size: 0.92rem;
  white-space: nowrap;
}
.jn-company{ color: var(--text-faint); font-size: 0.82rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; margin: 0 0 4px; }
.jn-body h3{ font-size: 1.2rem; color: var(--text); margin-bottom: 10px; }
.jn-desc{ color: var(--text-soft); font-size: 0.94rem; margin: 0 0 16px; }
.jn-chips{ display:flex; flex-wrap: wrap; gap: 8px; }
.jn-chip{
  background: rgba(45,212,191,0.1); border: 1px solid rgba(45,212,191,0.25); color: var(--accent-text);
  font-size: 0.78rem; font-weight: 700; padding: 6px 12px; border-radius: 999px;
}

/* CASE STUDIES */
.case-grid{ display:grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.case-card{
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 28px; transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}
.case-card:hover{ transform: translateY(-4px); box-shadow: var(--shadow); border-color: var(--accent); }
.case-eyebrow{
  display:inline-block; color: var(--accent-text); font-size: 0.75rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 12px; font-family: var(--mono);
}
.case-card h3{ font-size: 1.12rem; color: var(--text); margin-bottom: 10px; }
.case-card p{ color: var(--text-soft); font-size: 0.94rem; margin: 0 0 16px; }

/* SKILLS BARS */
.skills-bars{ display:grid; gap: 22px; max-width: 720px; }
.skill-bar-head{ display:flex; justify-content: space-between; margin-bottom: 8px; font-size: 0.92rem; font-weight: 600; color: var(--text); }
.skill-pct{ color: var(--accent-text); font-weight: 700; font-family: var(--mono); }
.skill-track{ height: 8px; background: var(--surface-2); border: 1px solid var(--border); border-radius: 999px; overflow: hidden; }
.skill-fill{
  height: 100%; width: 0%; border-radius: 999px;
  background: linear-gradient(90deg, var(--accent-dark), var(--accent));
  transition: width 1.2s cubic-bezier(0.22, 1, 0.36, 1);
}

/* CERTIFICATIONS */
.cert-grid{ display:grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.cert-card{
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 28px 20px; text-align:center;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}
.cert-card:hover{ transform: translateY(-4px); box-shadow: var(--shadow); border-color: var(--accent); }
.cert-icon{ font-size: 2rem; margin-bottom: 14px; }
.cert-card h3{ font-size: 0.92rem; color: var(--text); line-height: 1.4; }

/* EDUCATION */
.edu-grid{ display:grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.edu-card{
  background: var(--surface); border: 1px solid var(--border); border-left: 4px solid var(--accent);
  border-radius: var(--radius); padding: 26px 28px;
}
.edu-label{
  display:inline-block; color: var(--accent-text); font-size: 0.72rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 10px; font-family: var(--mono);
}
.edu-card h3{ font-size: 1.05rem; color: var(--text); margin-bottom: 8px; }
.edu-degree{ color: var(--text-soft); font-size: 0.9rem; margin: 0 0 6px; }
.edu-date{ color: var(--accent-text); font-weight: 700; font-size: 0.8rem; margin: 0; font-family: var(--mono); }

/* RESUME */
.resume-inner{ text-align:center; }
.resume-points{ display:grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin: 30px 0 40px; text-align:left; }
.resume-point{ background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; }
.resume-point h4{ font-size: 1rem; color: var(--text); margin-bottom: 8px; }
.resume-point p{ color: var(--text-soft); font-size: 0.88rem; margin: 0; }
.resume-text .section-title, .resume-text .section-tag{ text-align:center; }
.resume-text .btn{ display:inline-flex; }

/* CONTACT */
.section-contact{ background: var(--surface-2); }
.contact-inner{ text-align:center; }
.contact-lead{ color: var(--text-soft); max-width: 520px; margin: 0 auto 40px; font-size: 1.05rem; }
.contact-links{ display:flex; justify-content:center; gap: 20px; flex-wrap: wrap; }
.contact-link{
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px 32px; display:flex; flex-direction: column; gap: 6px; min-width: 240px;
  transition: transform 0.25s ease, border-color 0.25s ease;
}
.contact-link:hover{ transform: translateY(-4px); border-color: var(--accent); }
.contact-label{ color: var(--accent-text); font-size: 0.75rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.1em; font-family: var(--mono); }
.contact-value{ color: var(--text); font-weight: 700; font-size: 1rem; }

/* FOOTER */
.footer{ background: var(--bg); border-top: 1px solid var(--border); padding: 24px 0; }
.footer-inner{ display:flex; justify-content: space-between; color: var(--text-faint); font-size: 0.82rem; flex-wrap: wrap; gap: 8px; }

/* REVEAL */
.reveal{ opacity: 0; transform: translateY(24px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.in-view{ opacity: 1; transform: translateY(0); }

/* RESPONSIVE */
@media (max-width: 900px){
  .nav-links{ display:none; }
  .nav-cta{ display:none; }
  .nav-toggle{ display:flex; }
  .about-grid{ grid-template-columns: 1fr; }
  .cards-grid{ grid-template-columns: 1fr; }
  .case-grid{ grid-template-columns: 1fr; }
  .cert-grid{ grid-template-columns: 1fr 1fr; }
  .edu-grid{ grid-template-columns: 1fr; }
  .impact-grid{ grid-template-columns: 1fr 1fr; }
  .resume-points{ grid-template-columns: 1fr; }
  .jn-card{ grid-template-columns: 1fr; gap: 10px; }
  .hero-stats{ grid-template-columns: 1fr 1fr; gap: 24px; }
}
@media (max-width: 560px){
  .section{ padding: 70px 0; }
  .cert-grid{ grid-template-columns: 1fr; }
  .impact-grid{ grid-template-columns: 1fr; }
  .container{ padding: 0 20px; }
  .partners-row{ gap: 22px; }
}

/* MOBILE MENU */
.nav.menu-open .nav-links{
  display:flex; position:absolute; top: 100%; left:0; right:0; flex-direction: column;
  background: var(--bg); border-bottom: 1px solid var(--border);
  padding: 20px 28px 28px; gap: 18px; box-shadow: var(--shadow);
}
.nav.menu-open .nav-toggle span:nth-child(1){ transform: translateY(7px) rotate(45deg); }
.nav.menu-open .nav-toggle span:nth-child(2){ opacity: 0; }
.nav.menu-open .nav-toggle span:nth-child(3){ transform: translateY(-7px) rotate(-45deg); }

/* REDUCED MOTION
   Honours the OS-level "reduce motion" setting. Content stays fully visible —
   the reveal animation is neutralised rather than left in its hidden start state. */
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }

  *, *::before, *::after{
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  /* Scroll reveals: show content immediately, never mid-fade */
  .reveal,
  .reveal.in-view{ opacity: 1 !important; transform: none !important; }

  /* Drop purely decorative motion */
  .bg-dots .dot{ animation: none; opacity: 0.35; }
  .scroll-cue span{ animation: none; opacity: 1; top: 7px; }

  /* Remove lift/rotate on hover — colour and border feedback remain */
  .do-card:hover,
  .case-card:hover,
  .cert-card:hover,
  .contact-link:hover,
  .jn-card:hover,
  .btn:hover,
  .btn-primary:hover,
  .btn-ghost:hover,
  .nav-cta:hover,
  .theme-toggle:hover{ transform: none; }

  /* Skill bars and progress bar jump to value rather than sweeping */
  .skill-fill{ transition: none; }
  .progress-bar{ transition: none; }

  /* Skip link must still be reachable */
  .skip-link{ transition: none; }
}