/* ============ TOKENS ============ */
  :root{
    --bg: #FAF8F4;
    --bg-elevated: #FFFFFF;
    --text: #1B1F24;
    --text-muted: #5B6472;
    --accent: #E8890C;
    --accent-2: #1B8FA6;
    --accent-soft: rgba(232,137,12,0.12);
    --line: #E5E1D8;
    --shadow: rgba(30,25,15,0.08);
    --canvas-node: 27,31,36;
    --canvas-link: 232,137,12;

    --ease: cubic-bezier(.22,.9,.3,1);
    --ease-soft: cubic-bezier(.4,0,.2,1);
  }

  html.dark{
    --bg: #0B0F14;
    --bg-elevated: #121821;
    --text: #E9EDF2;
    --text-muted: #8A97A6;
    --accent: #FFB454;
    --accent-2: #5EC8D8;
    --accent-soft: rgba(255,180,84,0.14);
    --line: #1E2732;
    --shadow: rgba(0,0,0,0.35);
    --canvas-node: 233,237,242;
    --canvas-link: 255,180,84;
  }

  *{ box-sizing: border-box; }
  html{ scroll-behavior: smooth; }
  body{
    margin:0;
    background: var(--bg);
    color: var(--text);
    font-family: 'Inter', sans-serif;
    transition: background-color .5s var(--ease-soft), color .5s var(--ease-soft);
    overflow-x: hidden;
  }
  ::selection{ background: var(--accent-soft); color: var(--text); }

  a{ color: inherit; text-decoration: none; }
  h1,h2,h3{ font-family: 'Space Grotesk', sans-serif; margin: 0; letter-spacing: -0.02em; }
  p{ margin:0; color: var(--text-muted); line-height: 1.7; }
  .mono{ font-family: 'JetBrains Mono', monospace; }

  :focus-visible{
    outline: 2px solid var(--accent);
    outline-offset: 3px;
    border-radius: 4px;
  }

  .wrap{ max-width: 1080px; margin: 0 auto; padding: 0 32px; }
  section{ position: relative; padding: 140px 0; }
  @media (max-width: 640px){ section{ padding: 96px 0; } .wrap{ padding: 0 22px; } }

  .eyebrow{
    font-family: 'JetBrains Mono', monospace;
    font-size: 12.5px;
    letter-spacing: .14em;
    text-transform: uppercase;
    color: var(--accent);
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 18px;
  }
  .eyebrow::before{
    content:'';
    width: 20px; height: 1px;
    background: var(--accent);
  }

  /* ============ VIEW TRANSITION (theme toggle circle reveal) ============ */
  ::view-transition-old(root), ::view-transition-new(root){
    animation: none;
    mix-blend-mode: normal;
  }
  ::view-transition-old(root){ z-index: 1; }
  ::view-transition-new(root){ z-index: 2; }

  /* ============ NAV ============ */
  .nav{
    position: fixed; top: 0; left: 0; right: 0;
    z-index: 100;
    display: flex; align-items: center; justify-content: space-between;
    padding: 20px 32px;
    transition: transform .5s var(--ease), background-color .5s var(--ease-soft), border-color .5s var(--ease-soft);
    border-bottom: 1px solid transparent;
  }
  .nav.scrolled{
    background: color-mix(in srgb, var(--bg) 82%, transparent);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--line);
  }
  .nav.hide{ transform: translateY(-110%); }

  .logo{
    display:flex; align-items:center; gap: 10px;
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 600; font-size: 15px;
  }
  .logo-mark{
    width: 30px; height: 30px; border-radius: 8px;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    display:flex; align-items:center; justify-content:center;
    color: #0B0F14; font-family:'JetBrains Mono',monospace; font-size: 12px; font-weight: 500;
  }

  .nav-links{ display:flex; align-items:center; gap: 34px; }
  .nav-links a{
    font-size: 14px; color: var(--text-muted);
    position: relative; padding: 4px 0;
    transition: color .3s;
  }
  .nav-links a::after{
    content:''; position:absolute; left:0; bottom:0;
    width:0; height:1px; background: var(--accent);
    transition: width .35s var(--ease);
  }
  .nav-links a:hover{ color: var(--text); }
  .nav-links a:hover::after{ width: 100%; }
  @media (max-width: 720px){ .nav-links a:not(.nav-cta){ display:none; } }

  .theme-toggle{
    width: 38px; height: 38px; border-radius: 50%;
    border: 1px solid var(--line);
    background: var(--bg-elevated);
    display:flex; align-items:center; justify-content:center;
    cursor: pointer;
    transition: border-color .3s, transform .3s var(--ease);
    margin-left: 22px;
  }
  .theme-toggle:hover{ transform: scale(1.08); border-color: var(--accent); }
  .theme-toggle svg{ width: 17px; height: 17px; }

  /* ============ HERO ============ */
  .hero{
    min-height: 100svh;
    display:flex; align-items:center;
    padding-top: 120px;
    overflow: hidden;
  }
  #network-canvas{
    position:absolute; inset:0;
    width:100%; height:100%;
    opacity: .55;
    pointer-events:none;
  }
  html.dark #network-canvas{ opacity: .7; }

  .hero-inner{ position:relative; z-index: 2; max-width: 720px; }
  .hero h1{
    font-size: clamp(34px, 5.4vw, 58px);
    line-height: 1.12;
    font-weight: 600;
  }
  .hero h1 .accent-word{ color: var(--accent); }
  .hero-sub{
    margin-top: 22px; font-size: 17px; max-width: 540px;
  }

  .cycle-line{
    margin-top: 30px;
    display:flex; align-items:center; gap: 10px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 13.5px;
    color: var(--text-muted);
  }
  .cycle-dot{
    width: 7px; height: 7px; border-radius: 50%;
    background: var(--accent-2);
    box-shadow: 0 0 0 0 rgba(94,200,216,.6);
    animation: pulse-dot 2.2s ease-out infinite;
    flex-shrink: 0;
  }
  @keyframes pulse-dot{
    0%{ box-shadow: 0 0 0 0 var(--accent-soft); }
    70%{ box-shadow: 0 0 0 8px transparent; }
    100%{ box-shadow: 0 0 0 0 transparent; }
  }
  .cycle-words{ position: relative; height: 20px; overflow: hidden; min-width: 180px; }
  .cycle-words span{
    position:absolute; left:0; top:0;
    opacity: 0; transform: translateY(100%);
    color: var(--text);
    transition: opacity .5s var(--ease), transform .5s var(--ease);
    white-space: nowrap;
  }
  .cycle-words span.active{ opacity:1; transform: translateY(0); }
  .cycle-words span.leaving{ opacity:0; transform: translateY(-100%); }

  .hero-cta{ display:flex; gap: 16px; margin-top: 42px; flex-wrap: wrap; }

  .btn{
    position: relative;
    font-family: 'Inter', sans-serif;
    font-weight: 500; font-size: 14.5px;
    padding: 13px 26px;
    border-radius: 999px;
    cursor: pointer;
    display: inline-flex; align-items: center; gap: 8px;
    transition: transform .25s var(--ease-soft);
    border: 1px solid transparent;
  }
  .btn-primary{
    background: var(--text); color: var(--bg);
  }
  html.dark .btn-primary{ background: var(--accent); color: #0B0F14; }
  .btn-ghost{
    border-color: var(--line); color: var(--text);
    background: transparent;
  }
  .btn-ghost:hover{ border-color: var(--accent); }
  .btn svg{ width: 14px; height: 14px; transition: transform .3s var(--ease); }
  .btn:hover svg{ transform: translate(3px,-3px); }

  .scroll-cue{
    position:absolute; bottom: 36px; left: 50%;
    transform: translateX(-50%);
    display:flex; flex-direction:column; align-items:center; gap: 8px;
    color: var(--text-muted);
    font-family:'JetBrains Mono',monospace; font-size: 11px; letter-spacing:.1em;
  }
  .scroll-cue .line{
    width:1px; height: 30px; background: linear-gradient(var(--accent), transparent);
    animation: cue-move 1.8s ease-in-out infinite;
  }
  @keyframes cue-move{
    0%{ transform: scaleY(0); transform-origin: top; }
    50%{ transform: scaleY(1); transform-origin: top; }
    50.01%{ transform-origin: bottom; }
    100%{ transform: scaleY(0); transform-origin: bottom; }
  }

  /* ============ REVEAL ============ */
  .reveal{
    opacity: 0;
    transform: translateY(28px);
    transition: opacity .8s var(--ease), transform .8s var(--ease);
  }
  .reveal.in{ opacity: 1; transform: translateY(0); }

  /* ============ ABOUT ============ */
  .about-grid{
    display:grid; grid-template-columns: 1.1fr .9fr; gap: 64px; align-items: start;
  }
  @media (max-width: 860px){ .about-grid{ grid-template-columns: 1fr; gap: 44px; } }
  .about-grid h2{ font-size: clamp(26px, 3.4vw, 36px); margin-bottom: 20px; }
  .about-grid p + p{ margin-top: 16px; }

  .terminal{
    background: var(--bg-elevated);
    border: 1px solid var(--line);
    border-radius: 14px;
    overflow: hidden;
    box-shadow: 0 20px 50px -20px var(--shadow);
  }
  .terminal-bar{
    display:flex; gap: 7px; padding: 12px 16px;
    border-bottom: 1px solid var(--line);
  }
  .terminal-bar span{ width: 10px; height: 10px; border-radius: 50%; background: var(--line); }
  .terminal-body{
    padding: 22px 20px; font-family:'JetBrains Mono',monospace; font-size: 13px;
    line-height: 1.85; min-height: 190px; color: var(--text-muted);
    white-space: pre-wrap;
  }
  .terminal-body .kw{ color: var(--accent-2); }
  .terminal-body .fn{ color: var(--accent); }
  .terminal-body .str{ color: #7FB88E; }
  .caret{
    display:inline-block; width: 7px; height: 15px;
    background: var(--accent); vertical-align: middle;
    animation: blink 1s step-end infinite;
  }
  @keyframes blink{ 50%{ opacity:0; } }

  /* ============ SKILLS ============ */
  .skills-cat{ margin-bottom: 40px; }
  .skills-cat h3{
    font-size: 13px; text-transform: uppercase; letter-spacing: .1em;
    color: var(--text-muted); font-family:'JetBrains Mono',monospace; font-weight: 500;
    margin-bottom: 18px;
  }
  .pill-row{ display:flex; flex-wrap: wrap; gap: 10px; }
  .pill{
    display:flex; align-items:center; gap: 8px;
    padding: 9px 16px 9px 12px;
    border: 1px solid var(--line);
    border-radius: 999px;
    font-size: 13.5px;
    background: var(--bg-elevated);
    transition: transform .3s var(--ease), border-color .3s, box-shadow .3s;
  }
  .pill svg{ width: 15px; height: 15px; color: var(--accent); flex-shrink:0; }
  .pill:hover{
    transform: translateY(-3px);
    border-color: var(--accent);
    box-shadow: 0 10px 24px -14px var(--shadow);
  }

  /* ============ PROJECTS ============ */
  .project-grid{ display: grid; gap: 22px; }
  .project-card{
    position: relative;
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 34px;
    background: var(--bg-elevated);
    overflow: hidden;
    transition: border-color .4s, transform .1s linear;
    transform-style: preserve-3d;
  }
  .project-card::before{
    content:'';
    position:absolute; inset:0;
    background: radial-gradient(500px circle at var(--mx,50%) var(--my,50%), var(--accent-soft), transparent 60%);
    opacity: 0; transition: opacity .4s;
    pointer-events: none;
  }
  .project-card:hover::before{ opacity: 1; }
  .project-card:hover{ border-color: var(--accent); }

  .project-top{ display:flex; justify-content: space-between; align-items: flex-start; gap: 20px; }
  .project-card h3{ font-size: 21px; margin-bottom: 10px; }
  .project-card p{ font-size: 14.5px; max-width: 560px; }
  .project-link{
    width: 40px; height: 40px; border-radius: 50%;
    border: 1px solid var(--line);
    display:flex; align-items:center; justify-content:center;
    flex-shrink: 0;
    transition: transform .35s var(--ease), background .3s, border-color .3s;
  }
  .project-link svg{ width: 16px; height: 16px; transition: transform .35s var(--ease); }
  .project-card:hover .project-link{ background: var(--accent); border-color: var(--accent); }
  .project-card:hover .project-link svg{ transform: rotate(45deg); color: #0B0F14; }

  .tag-row{ display:flex; flex-wrap:wrap; gap: 8px; margin-top: 22px; }
  .tag{
    font-family:'JetBrains Mono',monospace; font-size: 11.5px;
    padding: 5px 11px; border-radius: 6px;
    background: var(--accent-soft); color: var(--accent);
  }

  /* ============ CONTACT ============ */
  .contact-inner{ text-align: center; max-width: 620px; margin: 0 auto; }
  .contact-inner h2{ font-size: clamp(28px, 4.4vw, 44px); margin-bottom: 18px; }
  .email-link{
    display:inline-flex; align-items:center; gap: 10px;
    font-family:'Space Grotesk', sans-serif; font-size: clamp(20px,3vw,28px);
    font-weight: 600; margin-top: 34px;
    position: relative; padding-bottom: 6px;
  }
  .email-link::after{
    content:''; position:absolute; left:0; bottom:0; width:100%; height:2px;
    background: var(--accent); transform: scaleX(0); transform-origin: left;
    transition: transform .5s var(--ease);
  }
  .email-link:hover::after{ transform: scaleX(1); }

  /* ---- contact form ---- */
  .contact-form{
    text-align: left;
    margin-top: 46px;
    display: grid;
    gap: 26px;
  }
  .form-row{ display: grid; grid-template-columns: 1fr 1fr; gap: 26px; }
  @media (max-width: 600px){ .form-row{ grid-template-columns: 1fr; gap: 26px; } }

  .field{ position: relative; }
  .field input, .field textarea{
    width: 100%;
    background: transparent;
    border: none;
    border-bottom: 1px solid var(--line);
    padding: 12px 2px 10px;
    font-family: 'Inter', sans-serif;
    font-size: 15.5px;
    color: var(--text);
    transition: border-color .35s var(--ease-soft);
  }
  .field textarea{ resize: vertical; min-height: 108px; line-height: 1.65; }
  .field input:focus, .field textarea:focus{ outline: none; }

  .field label{
    position: absolute; left: 2px; top: 12px;
    color: var(--text-muted); font-size: 15.5px;
    pointer-events: none; transform-origin: left;
    transition: transform .3s var(--ease), color .3s;
  }
  .field input:focus + label,
  .field input:not(:placeholder-shown) + label,
  .field textarea:focus + label,
  .field textarea:not(:placeholder-shown) + label{
    transform: translateY(-20px) scale(.76);
    color: var(--accent);
  }

  .field .underline{
    position: absolute; left: 0; bottom: 0;
    width: 100%; height: 1px;
    background: var(--accent);
    transform: scaleX(0); transform-origin: left;
    transition: transform .45s var(--ease);
  }
  .field input:focus ~ .underline, .field textarea:focus ~ .underline{ transform: scaleX(1); }

  .field-error{
    display: block;
    font-size: 12.5px;
    font-family: 'JetBrains Mono', monospace;
    color: var(--form-error, #D64545);
    max-height: 0; opacity: 0; overflow: hidden;
    transition: max-height .3s var(--ease), opacity .3s, margin-top .3s;
  }
  html.dark{ --form-error: #FF7A7A; }
  .field.invalid input, .field.invalid textarea{ border-bottom-color: var(--form-error, #D64545); }
  .field.invalid .field-error{ max-height: 24px; opacity: 1; margin-top: 6px; }
  .field.invalid{ animation: field-shake .4s var(--ease); }
  @keyframes field-shake{
    0%,100%{ transform: translateX(0); }
    25%{ transform: translateX(-5px); }
    75%{ transform: translateX(5px); }
  }

  .form-submit{ width: fit-content; position: relative; }
  .form-submit .icon-check{ display: none; }
  .form-submit .btn-spinner{
    display: none;
    width: 14px; height: 14px;
    border-radius: 50%;
    border: 2px solid rgba(255,255,255,.35);
    border-top-color: currentColor;
    animation: spin .7s linear infinite;
  }
  html:not(.dark) .form-submit .btn-spinner{ border: 2px solid rgba(255,255,255,.3); border-top-color: #fff; }
  @keyframes spin{ to{ transform: rotate(360deg); } }

  .form-submit.loading .btn-icon.icon-arrow{ display: none; }
  .form-submit.loading .btn-spinner{ display: inline-block; }
  .form-submit.loading .btn-label::after{ content: 'Opening…'; }
  .form-submit.loading .btn-label{ font-size: 0; }
  .form-submit.loading .btn-label::after{ font-size: 14.5px; }

  .form-submit.success{ background: #3FA76B; }
  .form-submit.success .btn-icon.icon-arrow{ display: none; }
  .form-submit.success .btn-spinner{ display: none; }
  .form-submit.success .icon-check{ display: inline-block; animation: check-pop .4s var(--ease); }
  .form-submit.success .btn-label::after{ content: 'Ready to send'; font-size: 14.5px; }
  .form-submit.success .btn-label{ font-size: 0; }
  @keyframes check-pop{
    0%{ transform: scale(0); }
    60%{ transform: scale(1.25); }
    100%{ transform: scale(1); }
  }

  .form-note{
    font-size: 12.5px;
    font-family: 'JetBrains Mono', monospace;
    color: var(--text-muted);
    margin-top: -8px;
  }

  .social-row{ display:flex; justify-content:center; gap: 28px; margin-top: 40px; }
  .social-row a{
    display:flex; align-items:center; gap: 6px;
    font-size: 13.5px; color: var(--text-muted);
    transition: color .3s;
  }
  .social-row a:hover{ color: var(--accent); }
  .social-row svg{ width: 12px; height: 12px; transition: transform .3s var(--ease); }
  .social-row a:hover svg{ transform: translate(2px,-2px); }

  footer{
    padding: 40px 0 50px; text-align:center;
    font-size: 12.5px; color: var(--text-muted);
    font-family:'JetBrains Mono',monospace;
    border-top: 1px solid var(--line);
  }

  @media (prefers-reduced-motion: reduce){
    *{ animation-duration: .001s !important; transition-duration: .001s !important; }
    html{ scroll-behavior: auto; }
  }