/* Sona Vorn Portfolio — styles. Colours live in the :root variables (light) and html[data-theme="dark"] (dark). */
:root, html[data-theme="light"] {
  --bg:#ffffff;
  --surface:#f3f7f4;
  --surface-2:#ffffff;
  --surface-3:#e7f1ed;
  --border:#dce8e2;
  --text:#17211e;
  --text-soft:#33443f;
  --text-muted:#6b7b75;
  --accent:#177d73;
  --accent-2:#b48735;
  --accent-soft:#e4f2ee;
  --accent-rgb:23,125,115;
  --accent-contrast:#ffffff;
  --header-bg:rgba(255,255,255,.82);
  --shadow:0 16px 45px rgba(18,24,40,.08);
  --shadow-soft:0 8px 24px rgba(18,24,40,.05);
}
html[data-theme="dark"] {
  --bg:#081512;
  --surface:#0d1f1a;
  --surface-2:#11261f;
  --surface-3:#17362d;
  --border:#29443a;
  --text:#f2f6f3;
  --text-soft:#d5e1dc;
  --text-muted:#91aaa1;
  --accent:#67cfbd;
  --accent-2:#dfb45f;
  --accent-soft:rgba(103,207,189,.12);
  --accent-rgb:103,207,189;
  --accent-contrast:#07130f;
  --header-bg:rgba(8,21,18,.84);
  --shadow:0 18px 50px rgba(0,0,0,.32);
  --shadow-soft:0 8px 24px rgba(0,0,0,.22);
}

* { box-sizing:border-box; margin:0; padding:0; }
html { scroll-behavior:smooth; }
body {
  background:var(--bg);
  color:var(--text);
  font-family:"Inter",sans-serif;
  line-height:1.7;
  overflow-x:hidden;
  transition:background .25s ease,color .25s ease;
}
body::before {
  content:"";
  position:fixed;
  inset:0;
  z-index:-2;
  pointer-events:none;
  background:
    radial-gradient(circle at 12% 7%, rgba(var(--accent-rgb),.09), transparent 24rem),
    radial-gradient(circle at 88% 19%, rgba(var(--accent-rgb),.05), transparent 28rem);
}
h1,h2,h3,h4 { font-family:"Sora",sans-serif; line-height:1.18; letter-spacing:-.03em; }
a { color:inherit; text-decoration:none; }
button { font:inherit; }
img { max-width:100%; display:block; }
::selection { background:var(--accent); color:var(--accent-contrast); }
svg.icon { width:20px; height:20px; stroke:currentColor; stroke-width:1.7; fill:none; stroke-linecap:round; stroke-linejoin:round; }
.inner { width:min(1180px,calc(100% - 48px)); margin-inline:auto; }
section { padding:108px 0; scroll-margin-top:80px; }

.skip-link {
  position:absolute; left:-9999px; top:12px; z-index:1000;
  background:var(--accent); color:var(--accent-contrast); padding:10px 14px; border-radius:10px;
}
.skip-link:focus { left:12px; }

.scroll-progress {
  position:fixed; top:0; left:0; width:0; height:3px; z-index:999;
  background:linear-gradient(90deg,var(--accent),var(--accent-2));
}

/* Header */
header {
  position:sticky; top:0; z-index:100;
  background:var(--header-bg);
  backdrop-filter:blur(16px);
  border-bottom:1px solid color-mix(in srgb,var(--border) 80%,transparent);
  isolation:isolate;
}
.nav-wrap {
  width:min(1180px,calc(100% - 48px));
  margin:auto; min-height:72px;
  display:flex; align-items:center; justify-content:space-between; gap:20px;
}
.logo { display:flex; align-items:center; gap:10px; font:700 1rem "Sora",sans-serif; }
.logo-img {
  width: 36px;
  height: 36px;
  border-radius: 13px;
  object-fit: cover;

  border: 2px solid var(--accent);
  box-shadow: 0 8px 18px rgba(var(--accent-rgb), .22);
}
.nav-right { display:flex; align-items:center; gap:16px; }
nav ul { display:flex; gap:26px; list-style:none; }
nav a {
  position:relative; color:var(--text-muted); font-size:.9rem; font-weight:600;
  padding:8px 0; transition:color .2s ease;
}
nav a:hover, nav a.active { color:var(--text); }
nav a.active::after {
  content:""; position:absolute; left:0; right:0; bottom:1px; height:2px;
  background:var(--accent); border-radius:4px;
}

.theme-toggle {
  width:44px; height:26px; padding:2px;
  border:1px solid var(--border); border-radius:999px;
  background:var(--surface); cursor:pointer;
}
.theme-toggle .knob {
  width:20px; height:20px; border-radius:50%;
  display:grid; place-items:center; background:var(--accent); color:var(--accent-contrast);
  transition:transform .25s ease;
}
html[data-theme="dark"] .theme-toggle .knob { transform:translateX(18px); }
.theme-toggle svg { width:12px; height:12px; }

.nav-toggle {
  display:none; border:1px solid var(--border); background:var(--surface);
  color:var(--text); border-radius:10px; width:40px; height:40px; cursor:pointer;
}

/* Reusable */
.eyebrow {
  display:flex; align-items:center; gap:9px;
  font-size:.78rem; font-weight:700; color:var(--accent);
  text-transform:uppercase; letter-spacing:.09em; margin-bottom:14px;
}
.eyebrow::before { content:""; width:18px; height:2px; border-radius:4px; background:var(--accent); }
.hero .eyebrow { justify-content:center; }
.hero .eyebrow::before { display:none; }

.section-heading { margin-bottom:44px; }
.section-title { font-size:clamp(2rem,3.5vw,3rem); max-width:720px; }
.section-lede { color:var(--text-muted); max-width:660px; margin-top:14px; font-size:1rem; }

.signal-divider { width:min(1180px,calc(100% - 48px)); height:28px; margin:auto; overflow:hidden; }
.signal-divider svg { width:100%; height:100%; display:block; }
.signal-divider path { stroke:var(--border); stroke-width:1.5; fill:none; }
.signal-divider path.active {
  stroke:var(--accent); stroke-dasharray:8 930; animation:travel 7s linear infinite;
}
@keyframes travel { to { stroke-dashoffset:-930; } }

.btn-row { display:flex; justify-content:center; flex-wrap:wrap; gap:12px; }
.btn {
  min-height:48px; padding:12px 22px; border-radius:999px;
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  font-weight:700; font-size:.9rem; border:1px solid transparent;
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease,background .18s ease;
}
.btn:hover { transform:translateY(-2px); }
.btn-primary { background:var(--accent); color:var(--accent-contrast); box-shadow:0 10px 24px rgba(var(--accent-rgb),.18); }
.btn-ghost { border-color:var(--border); background:var(--surface-2); }
.btn-ghost:hover { border-color:var(--accent); color:var(--accent); }

.card {
  background:var(--surface-2); border:1px solid var(--border);
  border-radius:18px; box-shadow:var(--shadow-soft);
}

/* Hero */
.hero { min-height:calc(100vh - 72px); display:grid; align-items:center; padding:76px 0 58px; }
.hero-inner { width:min(980px,calc(100% - 48px)); margin:auto; text-align:center; }
.status {
  display:inline-flex; align-items:center; gap:8px;
  padding:7px 12px; border-radius:999px;
  border:1px solid var(--border); background:var(--surface-2);
  color:var(--text-muted); font-size:.78rem; font-weight:600;
  margin-bottom:22px;
}
.status-dot { width:8px; height:8px; border-radius:50%; background:#22c55e; box-shadow:0 0 0 5px rgba(34,197,94,.1); }
.hero h1 { font-size:clamp(3rem,7vw,5.8rem); letter-spacing:-.06em; margin-bottom:18px; }
.hero h1 span { color:var(--accent); }
.role { color:var(--accent); font:600 clamp(1.05rem,2vw,1.3rem) "Sora",sans-serif; margin-bottom:22px; min-height:1.7em; }
.typing-cursor { color:var(--accent-2); animation:cursorBlink .8s infinite; }
@keyframes cursorBlink { 0%,50% { opacity:1; } 51%,100% { opacity:0; } }
.hero .desc { color:var(--text-muted); max-width:720px; margin:0 auto 34px; font-size:1.04rem; }
.hero .btn-row { margin-bottom:48px; }

.hero-panels {
  display:grid; grid-template-columns:1.1fr .9fr; gap:18px; text-align:left; margin-top:30px;
}
.hero-panel {
  padding:24px; border:1px solid var(--border); border-radius:18px; background:var(--surface-2);
}
.hero-panel h3 { font-size:1rem; margin-bottom:14px; }
.console { font:500 .82rem/1.9 "Sora",sans-serif; color:var(--text-muted); }
.console .prompt { color:var(--accent); }
.console strong { color:var(--text); }
.mini-stats { display:grid; grid-template-columns:repeat(3,1fr); gap:10px; }
.mini-stat {
  padding:16px; border-radius:14px; background:var(--surface);
  border:1px solid var(--border);
}
.mini-stat strong { display:block; font:700 1.35rem "Sora"; }
.mini-stat span { display:block; color:var(--text-muted); font-size:.72rem; line-height:1.4; margin-top:5px; }

/* About */
.about-layout { display:grid; grid-template-columns:1.15fr .85fr; gap:56px; align-items:start; }
.about-copy p { color:var(--text-muted); margin-bottom:16px; }
.about-copy strong { color:var(--text); }
.about-copy h3 { font-size:1.05rem; margin:30px 0 8px; }
.about-copy h3:first-child { margin-top:0; }
.pull-quote {
  margin:28px 0; padding:22px 0 22px 22px;
  border-left:3px solid var(--accent); color:var(--text);
  font:600 1.24rem/1.55 "Sora",sans-serif;
}
.story-cards { display:grid; gap:18px; }
.photo-card { overflow:hidden; }
.photo-card .ph {
  aspect-ratio:4/3; background:var(--surface); color:var(--text-muted);
  display:grid; place-items:center; text-align:center; padding:24px;
  border-bottom:1px solid var(--border);
}
.photo-card img { width:100%; height:auto; aspect-ratio:4/3; object-fit:cover; }
.photo-card .cap { padding:14px 16px; color:var(--text-muted); font-size:.86rem; }
.photo-card .cap b { color:var(--text); }
.fact-card { padding:24px; }
.fact-card .k { color:var(--accent); font-size:.74rem; font-weight:700; text-transform:uppercase; letter-spacing:.08em; margin-bottom:8px; }
.fact-card p { color:var(--text-muted); font-size:.9rem; }

/* Education */
.edu-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:18px; margin-top:54px; }
.edu-card { padding:24px; transition:transform .2s ease,border-color .2s ease; }
.edu-card:hover { transform:translateY(-3px); border-color:color-mix(in srgb,var(--accent) 45%,var(--border)); }
.edu-card .tag { display:block; color:var(--accent); font-size:.72rem; font-weight:700; text-transform:uppercase; letter-spacing:.07em; margin-bottom:10px; }
.edu-card h4 { font-size:1rem; margin-bottom:6px; }
.edu-card .school { color:var(--text-muted); font-size:.85rem; margin-bottom:12px; }
.edu-card p { color:var(--text-muted); font-size:.86rem; }

/* Skills */
.skills-grid { display:grid; grid-template-columns:repeat(2,1fr); gap:18px; }
.skill-card { padding:26px; transition:transform .2s ease,border-color .2s ease; }
.skill-card:hover { transform:translateY(-3px); border-color:color-mix(in srgb,var(--accent) 45%,var(--border)); }
.icon-wrap {
  width:46px; height:46px; display:grid; place-items:center;
  border-radius:13px; background:var(--accent-soft); color:var(--accent); margin-bottom:17px;
}
.skill-card h3 { font-size:1.04rem; margin-bottom:14px; }
.chip-row { display:flex; flex-wrap:wrap; gap:8px; }
.chip {
  padding:6px 11px; border-radius:999px; background:var(--surface);
  border:1px solid var(--border); color:var(--text-muted); font-size:.76rem;
}

/* Projects */
.project-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:18px; }
.project-card {
  padding:28px; display:flex; flex-direction:column; min-height:330px;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.project-card:hover { transform:translateY(-5px); box-shadow:var(--shadow); border-color:color-mix(in srgb,var(--accent) 48%,var(--border)); }
.project-top { display:flex; align-items:center; justify-content:space-between; gap:12px; margin-bottom:28px; }
.project-index { font:700 .78rem "Sora"; color:var(--text-muted); }
.project-icon {
  width:42px; height:42px; border-radius:12px; background:var(--accent-soft); color:var(--accent);
  display:grid; place-items:center;
}
.ptag { color:var(--accent); font-size:.72rem; font-weight:700; text-transform:uppercase; letter-spacing:.08em; margin-bottom:10px; }
.project-card h3 { font-size:1.15rem; margin-bottom:12px; }
.project-card p { color:var(--text-muted); font-size:.9rem; margin-bottom:18px; flex:1; }
.project-card .chip-row { margin-bottom:20px; }
.project-link { color:var(--accent); font-weight:700; font-size:.86rem; }

/* Experience */
.exp-list { position:relative; padding-left:30px; }
.exp-list::before { content:""; position:absolute; left:6px; top:8px; bottom:8px; width:1px; background:var(--border); }
.exp-item { position:relative; padding:0 0 48px; }
.exp-item:last-child { padding-bottom:0; }
.exp-item::before {
  content:""; position:absolute; left:-30px; top:5px; width:13px; height:13px; border-radius:50%;
  background:var(--bg); border:3px solid var(--accent); box-shadow:0 0 0 5px var(--accent-soft);
}
.exp-time { color:var(--text-muted); font-size:.82rem; margin-bottom:6px; }
.exp-role { font:700 1.15rem "Sora"; }
.exp-org { color:var(--accent); font-size:.88rem; font-weight:700; margin:5px 0 12px; }
.exp-item p { color:var(--text-muted); max-width:760px; font-size:.92rem; margin-bottom:14px; }

/* Contact */
.contact-shell {
  padding:36px; display:grid; grid-template-columns:1fr 1fr; gap:36px;
  background:linear-gradient(145deg,var(--surface-2),var(--surface));
}
.contact-copy p { color:var(--text-muted); margin-top:14px; max-width:560px; }
.contact-grid { display:grid; grid-template-columns:1fr; gap:12px; }
.contact-card {
  display:flex; align-items:center; gap:14px; padding:16px;
  transition:transform .2s ease,border-color .2s ease;
}
.contact-card:hover { transform:translateX(4px); border-color:color-mix(in srgb,var(--accent) 48%,var(--border)); }
.ci {
  width:42px; height:42px; flex:0 0 42px; display:grid; place-items:center;
  border-radius:12px; background:var(--accent-soft); color:var(--accent);
}
.contact-card .label { color:var(--text-muted); font-size:.7rem; text-transform:uppercase; letter-spacing:.07em; }
.contact-card .value { font-size:.9rem; font-weight:700; }

/* Footer */
footer { border-top:1px solid var(--border); padding:34px 0 42px; }
.footer-inner {
  width:min(1180px,calc(100% - 48px)); margin:auto;
  display:flex; justify-content:space-between; gap:22px; align-items:center;
  color:var(--text-muted); font-size:.84rem;
}
.footer-inner strong { color:var(--text); font-family:"Sora"; }
.footer-quote { color:var(--text-soft); font-weight:600; }

.back-top {
  position:fixed; right:84px; bottom:22px; z-index:80; width:44px; height:44px;
  border-radius:14px; border:1px solid var(--border); background:var(--surface-2); color:var(--text);
  box-shadow:var(--shadow-soft); cursor:pointer; opacity:0; pointer-events:none; transform:translateY(8px);
  transition:.2s ease;
}
.back-top.show { opacity:1; pointer-events:auto; transform:none; }

/* Portfolio chatbot */
.chatbot-launcher {
  position:fixed; left:22px; bottom:22px; z-index:150;
  width:52px; height:52px; border:0; border-radius:17px;
  display:grid; place-items:center; cursor:pointer;
  background:linear-gradient(145deg,var(--accent),color-mix(in srgb,var(--accent) 72%,#052e2b));
  color:var(--accent-contrast); box-shadow:0 14px 34px rgba(var(--accent-rgb),.32);
  transition:transform .2s ease,box-shadow .2s ease;
}
.chatbot-launcher:hover { transform:translateY(-3px); box-shadow:0 18px 42px rgba(var(--accent-rgb),.38); }
.chatbot-launcher svg { width:24px; height:24px; }
.chatbot-launcher .chat-close-icon { display:none; font-size:1.35rem; line-height:1; }
.chatbot-launcher[aria-expanded="true"] .chat-open-icon { display:none; }
.chatbot-launcher[aria-expanded="true"] .chat-close-icon { display:block; }
.chatbot-badge {
  position:absolute; right:-3px; top:-3px; width:14px; height:14px; border-radius:50%;
  background:var(--accent-2); border:3px solid var(--bg);
}

.chatbot-greeting {
  position:fixed; left:84px; bottom:29px; z-index:148;
  padding:10px 14px; border:1px solid var(--border); border-radius:14px 14px 14px 4px;
  color:var(--text); background:var(--surface-2); box-shadow:var(--shadow-soft);
  font-size:.8rem; font-weight:700; white-space:nowrap; cursor:pointer;
  opacity:0; visibility:hidden; transform:translateX(-8px);
  transition:opacity .22s ease,transform .22s ease,visibility .22s;
}
.chatbot-greeting.show { opacity:1; visibility:visible; transform:none; }

.chatbot-panel {
  position:fixed; left:22px; bottom:86px; z-index:149;
  width:min(380px,calc(100vw - 28px)); height:min(570px,calc(100vh - 112px));
  display:grid; grid-template-rows:auto 1fr auto;
  overflow:hidden; border:1px solid var(--border); border-radius:22px;
  background:var(--surface-2); box-shadow:0 24px 70px rgba(0,0,0,.22);
  opacity:0; visibility:hidden; transform:translateY(14px) scale(.97);
  transform-origin:bottom left; transition:opacity .22s ease,transform .22s ease,visibility .22s;
}
.chatbot-panel.open { opacity:1; visibility:visible; transform:none; }
.chatbot-header {
  display:flex; align-items:center; gap:12px; padding:17px 18px;
  color:var(--accent-contrast); background:linear-gradient(135deg,var(--accent),color-mix(in srgb,var(--accent) 68%,#073c35));
}
.chatbot-avatar {
  width: 38px;
  height: 38px;
  flex: 0 0 38px;
  border-radius: 13px;
  overflow: hidden;
}

.chatbot-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.chatbot-title { font:700 .92rem "Sora",sans-serif; }
.chatbot-status { display:flex; align-items:center; gap:6px; margin-top:2px; font-size:.72rem; opacity:.82; }
.chatbot-status::before { content:""; width:6px; height:6px; border-radius:50%; background:#9af7bd; }
.chatbot-header .chatbot-minimise {
  margin-left:auto; width:34px; height:34px; border:0; border-radius:10px;
  color:inherit; background:rgba(255,255,255,.12); cursor:pointer; font-size:1.1rem;
}
.chatbot-messages { overflow-y:auto; padding:18px; scroll-behavior:smooth; }
.chat-message { display:flex; margin-bottom:12px; }
.chat-message.user { justify-content:flex-end; }
.chat-bubble {
  max-width:86%; padding:11px 13px; border-radius:15px;
  font-size:.84rem; line-height:1.55; white-space:pre-line;
}
.chat-message.bot .chat-bubble { background:var(--surface); color:var(--text-soft); border:1px solid var(--border); border-bottom-left-radius:5px; }
.chat-message.user .chat-bubble { background:var(--accent); color:var(--accent-contrast); border-bottom-right-radius:5px; }
.chat-quick-replies { display:flex; gap:7px; flex-wrap:wrap; margin:3px 0 15px; }
.chat-quick-reply {
  padding:7px 10px; border:1px solid color-mix(in srgb,var(--accent) 42%,var(--border));
  border-radius:999px; color:var(--accent); background:var(--accent-soft);
  font-size:.72rem; font-weight:700; cursor:pointer;
}
.chat-quick-reply:hover { border-color:var(--accent); }
.chatbot-form { display:grid; grid-template-columns:1fr auto; gap:8px; padding:13px; border-top:1px solid var(--border); background:var(--surface-2); }
.chatbot-input {
  min-width:0; height:44px; padding:0 14px; border:1px solid var(--border); border-radius:13px;
  outline:none; color:var(--text); background:var(--surface); font:inherit; font-size:.83rem;
}
.chatbot-input:focus { border-color:var(--accent); box-shadow:0 0 0 3px var(--accent-soft); }
.chatbot-send {
  width:44px; height:44px; border:0; border-radius:13px; display:grid; place-items:center;
  color:var(--accent-contrast); background:var(--accent); cursor:pointer;
}
.chatbot-send svg { width:18px; height:18px; }

/* Reveal */
.reveal { opacity:0; transform:translateY(18px); transition:opacity .6s ease,transform .6s ease; }
.reveal.visible { opacity:1; transform:none; }

@media (max-width:980px) {

  .nav-right {
    gap: 10px;
  }

  /* Dropdown menu */
  nav ul {
    position: fixed;
    top: 82px;
    left: 14px;
    right: 14px;

    z-index: 999;

    display: flex;
    flex-direction: column;
    gap: 4px;

    padding: 10px;

    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: 18px;

    box-shadow: 0 20px 50px rgba(0,0,0,.25);

    /* hidden */
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);

    transition:
      opacity .2s ease,
      transform .2s ease,
      visibility .2s;
  }

  /* Open menu */
  nav ul.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  nav li {
    border: 0;
  }

  nav a {
    display: block;
    padding: 12px 14px;
    border-radius: 10px;

    font-size: .9rem;
    color: var(--text-muted);
  }

  nav a:hover,
  nav a.active {
    background: var(--accent-soft);
    color: var(--accent);
  }

  /* Remove desktop underline on mobile */
  nav a.active::after {
    display: none;
  }

  .nav-toggle {
    display: grid;
    place-items: center;
  }

  .hero-panels,
  .about-layout,
  .contact-shell {
    grid-template-columns: 1fr;
  }

  .edu-grid,
  .project-grid {
    grid-template-columns: 1fr;
  }
}
@media (max-width:720px) {
  .inner,.nav-wrap,.signal-divider,.footer-inner,.hero-inner { width:min(100% - 28px,1180px); }
  section { padding:82px 0; }
  .hero { min-height:auto; padding-top:64px; }
  .hero h1 { font-size:clamp(2.8rem,16vw,4.6rem); }
  .skills-grid { grid-template-columns:1fr; }
  .mini-stats { grid-template-columns:1fr; }
  .footer-inner { flex-direction:column; align-items:flex-start; }
  .contact-shell { padding:24px; }
  .chatbot-panel { left:14px; bottom:78px; height:min(560px,calc(100vh - 98px)); }
  .chatbot-launcher { left:14px; bottom:14px; }
  .chatbot-greeting { left:76px; bottom:21px; max-width:calc(100vw - 100px); white-space:normal; }
  .back-top { right:14px; bottom:18px; }
}
@media (prefers-reduced-motion:reduce) {
  *,*::before,*::after { animation-duration:.001ms !important; animation-iteration-count:1 !important; transition-duration:.001ms !important; scroll-behavior:auto !important; }
}
.rain-canvas {
  position: fixed !important;
  top: 0;
  left: 0;
  z-index: 0;
  pointer-events: none;
}

main,
footer {
  position: relative;
  z-index: 1;
}