/* ===== Design tokens (Syntactic Logic) ===== */
:root{
  --background:#0e141a;
  --surface:#0e141a;
  --surface-container-lowest:#080f14;
  --surface-container-low:#161c22;
  --surface-container:#1a2026;
  --surface-container-high:#242b31;
  --surface-container-highest:#2f353c;
  --surface-variant:#2f353c;
  --surface-bright:#333a40;
  --on-surface:#dde3eb;
  --on-surface-variant:#bcc9cd;
  --on-background:#dde3eb;
  --outline:#869397;
  --outline-variant:#3d494c;
  --primary:#4cd7f6;
  --on-primary:#003640;
  --primary-container:#06b6d4;
  --secondary:#ffb95f;
  --on-secondary:#472a00;

  --container-max:1280px;
  --gutter:24px;
  --margin-mobile:20px;
  --stack-sm:8px;
  --stack-md:16px;
  --stack-lg:32px;
  --section-gap:120px;

  --font-body:'Inter',system-ui,sans-serif;
  --font-mono:'JetBrains Mono',ui-monospace,monospace;
}

/* ===== Reset / base ===== */
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{background:var(--background);color:var(--on-background);font-family:var(--font-body);font-size:16px;line-height:24px;-webkit-font-smoothing:antialiased;overflow-x:hidden;transition:background-color .3s,color .3s;}
body.light{
  --background:#f5f7fa;--surface:#ffffff;--surface-container-lowest:#eef1f5;
  --surface-container-low:#ffffff;--surface-container:#f0f3f7;--surface-container-high:#e6eaf0;
  --surface-container-highest:#dde3eb;--surface-variant:#e2e8f0;--on-surface:#11181f;
  --on-surface-variant:#475059;--on-background:#11181f;--outline:#5b6770;--outline-variant:#c4ccd4;
  --primary:#0891b2;--primary-container:#06b6d4;--secondary:#d97706;
}
a{text-decoration:none;color:inherit;}
img{display:block;max-width:100%;}
.mono{font-family:var(--font-mono);}
.material-symbols-outlined{font-variation-settings:'FILL' 0,'wght' 400,'GRAD' 0,'opsz' 24;vertical-align:middle;line-height:1;}
.ico-sm{font-size:18px;}
.container{max-width:var(--container-max);margin:0 auto;padding:0 var(--gutter);}
::selection{background:rgba(76,215,246,.3);}
.cyan{color:var(--primary);}

/* ===== Navigation ===== */
.nav{position:fixed;top:0;width:100%;z-index:50;background:rgba(14,20,26,.7);backdrop-filter:blur(12px);border-bottom:1px solid rgba(61,73,76,.3);}
.nav__inner{display:flex;justify-content:space-between;align-items:center;height:64px;max-width:var(--container-max);margin:0 auto;padding:0 var(--gutter);}
.nav__logo{font-size:24px;font-weight:700;letter-spacing:-.04em;color:var(--primary);}
.nav__links{display:none;gap:var(--stack-lg);align-items:center;}
.nav__link{color:var(--on-surface-variant);transition:color .3s;}
.nav__link:hover{color:var(--primary);}
.nav__link--active{color:var(--primary);border-bottom:2px solid var(--primary);padding-bottom:4px;}
.nav__actions{display:flex;align-items:center;gap:var(--stack-sm);}
.nav__btn{background:none;border:none;cursor:pointer;padding:8px;color:var(--primary);display:inline-flex;transition:transform .15s;}
.nav__btn:hover{transform:scale(.95);}
@media(min-width:768px){.nav__links{display:flex;}}

/* ===== Footer ===== */
.footer{width:100%;padding:var(--stack-lg) 0;border-top:1px solid rgba(61,73,76,.2);background:var(--surface-container-lowest);}
.footer__inner{display:flex;flex-direction:column;align-items:center;gap:var(--stack-md);max-width:var(--container-max);margin:0 auto;padding:0 var(--gutter);}
.footer__copy{font-size:12px;letter-spacing:.1em;color:var(--on-surface-variant);}
.footer__links{display:flex;gap:var(--stack-lg);align-items:center;font-family:var(--font-mono);font-size:14px;}
.footer__links a{color:var(--on-surface-variant);transition:color .2s;}
.footer__links a:hover{color:var(--secondary);}
@media(min-width:768px){.footer__inner{flex-direction:row;justify-content:space-between;}}

/* ===== Page ===== */
.page{position:relative;padding-top:128px;padding-bottom:var(--section-gap);min-height:100vh;}
.circuit-accent{position:absolute;background:rgba(76,215,246,.1);z-index:-1;}
.circuit-accent--v{top:0;left:10%;width:1px;height:100%;}
.circuit-accent--h{top:50%;left:0;width:100%;height:1px;}

.head{margin-bottom:var(--stack-lg);}
.status{display:flex;align-items:center;gap:8px;margin-bottom:var(--stack-sm);}
.dot{width:8px;height:8px;border-radius:9999px;display:inline-block;}
.dot--amber{background:var(--secondary);animation:pulse 2s infinite;}
.status__text{font-size:14px;color:var(--secondary);text-transform:uppercase;letter-spacing:.15em;}
.head__title{font-size:60px;line-height:72px;font-weight:800;letter-spacing:-.02em;color:var(--on-surface);margin-bottom:var(--stack-sm);}
.head__desc{font-size:18px;line-height:28px;color:var(--on-surface-variant);max-width:42rem;}
@media(max-width:767px){.head__title{font-size:40px;line-height:48px;}}

/* Grid */
.grid{display:grid;grid-template-columns:1fr;gap:var(--stack-lg);align-items:start;margin-top:48px;}
@media(min-width:768px){.grid{grid-template-columns:7fr 5fr;}}

/* Form */
.form-card{position:relative;overflow:hidden;background:var(--surface-container-low);padding:var(--stack-lg);border:1px solid rgba(61,73,76,.2);border-radius:8px;}
.form-card__bar{position:absolute;top:0;left:0;width:4px;height:100%;background:rgba(76,215,246,.2);transition:background .3s;}
.form-card:hover .form-card__bar{background:var(--primary);}
#contact-form{display:flex;flex-direction:column;gap:var(--stack-lg);}
.field{position:relative;}
.field__label{display:block;font-size:12px;font-weight:700;letter-spacing:.1em;color:var(--on-surface-variant);margin-bottom:8px;transition:color .2s;}
.field__input{width:100%;background:transparent;border:none;border-bottom:1px solid var(--outline-variant);padding:8px 0;font-family:var(--font-mono);font-size:14px;color:var(--on-surface);outline:none;transition:border-color .2s;}
.field__input::placeholder{color:rgba(188,201,205,.3);}
.field__input:focus{border-bottom-color:var(--primary);}
.field__textarea{width:100%;background:transparent;border:1px solid var(--outline-variant);border-radius:4px;padding:var(--stack-sm);font-family:var(--font-body);font-size:16px;color:var(--on-surface);outline:none;resize:none;transition:border-color .2s;}
.field__textarea::placeholder{color:rgba(188,201,205,.3);}
.field__textarea:focus{border-color:var(--primary);}
.field__flag{display:none;position:absolute;top:0;right:0;font-size:10px;color:var(--primary);}
.field__flag--box{top:8px;right:8px;}
.field__input:focus ~ .field__flag,.field__textarea:focus ~ .field__flag{display:block;}
.submit{display:inline-flex;align-items:center;justify-content:center;gap:8px;width:100%;padding:16px 48px;background:var(--primary);color:var(--on-primary);border:none;border-radius:4px;font-size:12px;font-weight:700;letter-spacing:.1em;cursor:pointer;transition:box-shadow .2s,transform .15s;}
.submit:hover{box-shadow:0 0 15px rgba(76,215,246,.3);}
.submit:active{transform:scale(.95);}
@media(min-width:768px){.submit{width:auto;}}

/* Details */
.details{display:flex;flex-direction:column;gap:var(--stack-lg);}
.info-card{background:var(--surface-container);padding:var(--stack-lg);border:1px solid rgba(61,73,76,.1);border-radius:8px;}
.info-card__title{font-size:12px;font-weight:700;letter-spacing:.1em;color:var(--secondary);margin-bottom:var(--stack-md);border-bottom:1px solid rgba(61,73,76,.2);padding-bottom:8px;}
.info-card__rows{display:flex;flex-direction:column;gap:var(--stack-md);}
.info-row{display:flex;align-items:flex-start;gap:var(--stack-sm);}
.info-row .material-symbols-outlined{margin-top:4px;}
.info-row__cap{font-size:10px;color:var(--on-surface-variant);text-transform:uppercase;}
.info-row__val{font-size:14px;color:var(--on-surface);transition:color .2s;}
a.info-row__val:hover{color:var(--primary);}

.socials{display:flex;flex-direction:column;gap:var(--stack-sm);}
.social{display:flex;align-items:center;justify-content:space-between;padding:var(--stack-md);background:var(--surface-container-low);border:1px solid rgba(61,73,76,.2);border-radius:8px;transition:background .2s,border-color .2s;}
.social:hover{background:rgba(255,185,95,.1);border-color:var(--secondary);}
.social__left{display:flex;align-items:center;gap:var(--stack-sm);}
.social__left .material-symbols-outlined{color:var(--on-surface-variant);transition:color .2s;}
.social:hover .social__left .material-symbols-outlined{color:var(--secondary);}
.social__left .mono{font-size:14px;color:var(--on-surface);}
.social__handle{font-size:10px;color:var(--secondary);opacity:0;transition:opacity .2s;}
.social:hover .social__handle{opacity:1;}

.visual{position:relative;height:192px;border-radius:8px;overflow:hidden;border:1px solid rgba(61,73,76,.2);}
.visual img{width:100%;height:100%;object-fit:cover;opacity:.4;transition:transform .7s;}
.visual:hover img{transform:scale(1.05);}
.visual__overlay{position:absolute;inset:0;background:linear-gradient(to top,var(--background),transparent);}
.visual__tag{position:absolute;bottom:var(--stack-sm);left:var(--stack-sm);font-size:10px;color:var(--secondary);}

@keyframes pulse{0%,100%{opacity:1;}50%{opacity:.4;}}