/* ---------- Tokens ---------- */
:root{
  --bg: #F7F7F5;
  --surface: #FFFFFF;
  --border: #E4E3DE;
  --ink: #14161C;
  --ink-dim: #62666F;
  --coral: #FF6B4A;
  --teal: #1E9E8C;
  --indigo: #4C5FD5;
  --gold: #E8A83C;

  --font-display: "Space Grotesk", sans-serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;

  --max: 1080px;
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }

body{
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.wrap{ max-width: var(--max); margin: 0 auto; padding: 0 24px; }

h1, h2, h3{
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.15;
  margin: 0 0 0.5em;
  letter-spacing: -0.01em;
}

p{ margin: 0 0 1em; max-width: 62ch; }
a{ color: inherit; }

.skip-link{
  position: absolute; left: -999px; top: 0;
  background: var(--coral); color: #fff; padding: 10px 16px; z-index: 100;
}
.skip-link:focus{ left: 12px; top: 12px; }

a:focus-visible, button:focus-visible{
  outline: 2px solid var(--coral); outline-offset: 3px;
}

/* ---------- Header ---------- */
.site-header{
  position: sticky; top: 0; z-index: 50;
  background: rgba(247, 247, 245, 0.88);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.header-inner{
  display: flex; align-items: center; justify-content: space-between;
  padding-top: 18px; padding-bottom: 18px;
}
.wordmark{ font-family: var(--font-display); font-size: 1.25rem; text-decoration: none; font-weight: 700; }
.wordmark .dot{ color: var(--coral); }
.nav{ display: flex; gap: 32px; }
.nav a{ text-decoration: none; color: var(--ink-dim); font-size: 0.95rem; transition: color .15s ease; }
.nav a:hover{ color: var(--ink); }

.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(--ink); display: block; }
.mobile-nav{ display: none; flex-direction: column; padding: 8px 24px 20px; border-top: 1px solid var(--border); }
.mobile-nav a{ color: var(--ink-dim); text-decoration: none; padding: 10px 0; font-size: 1rem; }
.mobile-nav.open{ display: flex; }

/* ---------- Hero ---------- */
.hero{ position: relative; padding: 120px 0 100px; overflow: hidden; }
#particleCanvas{ position: absolute; inset: 0; width: 100%; height: 100%; z-index: 0; }
.hero-inner{ position: relative; z-index: 1; max-width: 720px; }

.hero-role{
  font-family: var(--font-mono); font-size: 0.85rem; color: var(--teal);
  margin-bottom: 18px;
}
.hero-inner h1{ font-size: clamp(2.2rem, 5vw, 3.4rem); }
.hero-body{ color: var(--ink-dim); }

.hero-actions{ display: flex; gap: 14px; margin: 28px 0 22px; flex-wrap: wrap; }
.btn{
  display: inline-block; padding: 13px 24px; border-radius: 999px;
  text-decoration: none; font-size: 0.95rem; font-weight: 500;
  transition: transform .15s ease, background .15s ease, border-color .15s ease;
}
.btn-primary{ background: var(--coral); color: #fff; }
.btn-primary:hover{ transform: translateY(-2px); }
.btn-ghost{ border: 1px solid var(--border); color: var(--ink); }
.btn-ghost:hover{ border-color: var(--ink-dim); transform: translateY(-2px); }

.hero-links{ display: flex; gap: 10px; font-size: 0.9rem; }
.hero-links a{ text-decoration: none; color: var(--ink-dim); }
.hero-links a:hover{ color: var(--ink); }
.hero-links span{ color: var(--border); }

.scroll-cue{
  position: absolute; bottom: 28px; left: 50%; transform: translateX(-50%);
  width: 22px; height: 36px; border: 1.5px solid var(--border); border-radius: 12px; z-index: 1;
}
.scroll-cue span{
  position: absolute; top: 6px; left: 50%; transform: translateX(-50%);
  width: 4px; height: 8px; border-radius: 2px; background: var(--coral);
  animation: scrollcue 1.6s ease infinite;
}
@keyframes scrollcue{ 0%{ opacity:1; top:6px; } 70%{ opacity:0; top:18px; } 100%{ opacity:0; top:6px; } }

/* ---------- Sections ---------- */
.section{ padding: 84px 0; border-top: 1px solid var(--border); }
.section-alt{ background: var(--surface); }
.section h2{ font-size: clamp(1.7rem, 3.5vw, 2.3rem); margin-bottom: 8px; }
.section-lede{ color: var(--ink-dim); margin-bottom: 36px; }

/* Project cards */
.project-card{
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  margin-bottom: 20px;
  overflow: hidden;
}
.project-toggle{
  width: 100%; display: flex; align-items: center; justify-content: space-between;
  gap: 20px; background: none; border: none; text-align: left; cursor: pointer;
  padding: 26px 28px; font: inherit; color: inherit;
}
.project-toggle-text h3{ font-size: 1.3rem; margin-bottom: 6px; }
.project-toggle-text p{ color: var(--ink-dim); margin: 0; font-size: 0.95rem; }
.project-toggle-icon{
  flex-shrink: 0; width: 34px; height: 34px; border-radius: 50%;
  border: 1px solid var(--border); display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem; color: var(--coral); transition: transform .25s ease;
}
.project-toggle[aria-expanded="true"] .project-toggle-icon{ transform: rotate(45deg); }

.project-panel{
  max-height: 0; overflow: hidden;
  transition: max-height .4s ease, padding .4s ease;
  padding: 0 28px;
}
.project-panel.open{ max-height: 900px; padding: 0 28px 28px; }
.panel-intro{ color: var(--ink-dim); font-size: 0.9rem; margin-bottom: 18px; }

/* Pipeline */
.pipeline{ display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 16px; }
.pipe-node{
  display: flex; align-items: center; gap: 8px;
  background: var(--bg); border: 1px solid var(--border); border-radius: 999px;
  padding: 9px 16px; font-size: 0.85rem; font-family: var(--font-mono);
  cursor: pointer; color: var(--ink);
  transition: border-color .15s ease, background .15s ease;
}
.pipe-dot{ width: 7px; height: 7px; border-radius: 50%; background: var(--indigo); }
.pipe-node:hover{ border-color: var(--indigo); }
.pipe-node.active{ background: var(--indigo); color: #fff; border-color: var(--indigo); }
.pipe-node.active .pipe-dot{ background: #fff; }
.pipe-detail{
  background: var(--bg); border: 1px solid var(--border); border-radius: 10px;
  padding: 14px 16px; font-size: 0.92rem; color: var(--ink-dim); margin-bottom: 20px;
  min-height: 48px;
}

/* RFM chart */
.rfm-chart{
  display: flex; align-items: flex-end; gap: 14px;
  height: 160px; margin-bottom: 6px; padding-top: 10px;
}
.rfm-bar{
  flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: flex-end;
  background: none; border: none; cursor: pointer; height: 100%; padding: 0;
}
.bar-fill{
  width: 100%; max-width: 54px; height: var(--h); border-radius: 8px 8px 3px 3px;
  background: var(--teal); opacity: 0.55; transition: opacity .2s ease, transform .2s ease;
  display: block;
}
.rfm-bar[data-segment="champions"] .bar-fill{ background: var(--teal); }
.rfm-bar[data-segment="loyal"] .bar-fill{ background: var(--indigo); }
.rfm-bar[data-segment="new"] .bar-fill{ background: var(--gold); }
.rfm-bar[data-segment="at-risk"] .bar-fill{ background: var(--coral); }
.rfm-bar[data-segment="lost"] .bar-fill{ background: var(--ink-dim); }
.rfm-bar:hover .bar-fill, .rfm-bar.active .bar-fill{ opacity: 1; transform: scaleY(1.02); }
.bar-label{ font-size: 0.78rem; color: var(--ink-dim); margin-top: 8px; }
.rfm-detail{
  background: var(--bg); border: 1px solid var(--border); border-radius: 10px;
  padding: 14px 16px; font-size: 0.92rem; color: var(--ink-dim); margin: 16px 0 20px;
  min-height: 48px;
}

.tags{ display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
.tags span{
  font-family: var(--font-mono); font-size: 0.76rem; color: var(--ink-dim);
  border: 1px solid var(--border); border-radius: 999px; padding: 4px 12px;
}
.project-link{
  text-decoration: none; color: var(--coral); font-size: 0.95rem; font-weight: 500;
}
.project-link:hover{ text-decoration: underline; }

/* Skills */
.skill-group{ margin-bottom: 26px; }
.skill-group-label{
  display: block; font-family: var(--font-mono); font-size: 0.82rem;
  color: var(--teal); margin-bottom: 10px;
}
.chip-row{ display: flex; flex-wrap: wrap; gap: 10px; }
.chip{
  background: var(--bg); border: 1px solid var(--border); border-radius: 999px;
  padding: 8px 16px; font-size: 0.9rem; transition: transform .15s ease, border-color .15s ease;
}
.chip:hover{ transform: translateY(-2px); border-color: var(--coral); }

/* Timeline */
.timeline{ list-style: none; margin: 0; padding: 0; }
.timeline li{ display: grid; grid-template-columns: 180px 1fr; gap: 24px; padding: 24px 0; }
.timeline li + li{ border-top: 1px solid var(--border); }
.timeline-date{ font-family: var(--font-mono); font-size: 0.85rem; color: var(--ink-dim); }
.timeline-body h3{ font-size: 1.1rem; margin-bottom: 4px; }
.timeline-body p{ color: var(--ink-dim); font-size: 0.95rem; }

/* Contact */
.contact-body{ color: var(--ink-dim); }
.contact-links{ margin-top: 20px; }

/* Footer */
.site-footer{ border-top: 1px solid var(--border); padding: 28px 0 40px; }
.site-footer p{ color: var(--ink-dim); font-size: 0.85rem; margin: 0; }

/* Toast */
.toast{
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%) translateY(20px);
  background: var(--ink); color: #fff; padding: 12px 22px; border-radius: 999px;
  font-size: 0.9rem; opacity: 0; pointer-events: none;
  transition: opacity .4s ease, transform .4s ease; z-index: 60;
}
.toast.show{ opacity: 1; transform: translateX(-50%) translateY(0); }

/* Reveal on scroll */
.reveal{ opacity: 0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in{ opacity: 1; transform: translateY(0); }

/* ---------- Responsive ---------- */
@media (max-width: 860px){
  .nav{ display: none; }
  .nav-toggle{ display: flex; }
  .timeline li{ grid-template-columns: 1fr; gap: 6px; }
  .project-toggle{ flex-direction: column; align-items: flex-start; gap: 12px; }
}

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  .scroll-cue span{ animation: none; }
  .reveal{ opacity: 1; transform: none; transition: none; }
  #particleCanvas{ display: none; }
}