/* ===== 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;
  --secondary-fixed-dim:#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;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:14px;}
.container{max-width:var(--container-max);margin:0 auto;padding:0 var(--gutter);}
::selection{background:rgba(76,215,246,.3);}

/* ===== Navigation ===== */
.nav{position:fixed;top:0;width:100%;z-index:50;background:rgba(14,20,26,.7);backdrop-filter:blur(16px);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:12px;font-weight:700;letter-spacing:.1em;color:var(--primary);}
.nav__links{display:none;gap:var(--stack-lg);align-items:center;}
.nav__link{color:var(--on-surface-variant);text-transform:uppercase;letter-spacing:.05em;transition:color .2s;}
.nav__link:hover{color:var(--primary);}
.nav__link--active{color:var(--primary);border-bottom:1px 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;border-radius:9999px;color:var(--primary);display:inline-flex;transition:background .2s,transform .15s;}
.nav__btn:hover{background:var(--surface-variant);}
.nav__btn:active{transform:scale(.95);}
@media(min-width:768px){.nav__links{display:flex;}}

/* ===== Footer ===== */
.footer{width:100%;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:var(--stack-lg) var(--gutter);}
.footer__tag{font-size:12px;font-weight:700;letter-spacing:.1em;color:var(--on-surface);}
.footer__copy{font-size:14px;color:var(--secondary);}
.footer__links{display:flex;gap:var(--stack-md);}
.footer__links a{font-family:var(--font-mono);font-size:14px;color:var(--outline);text-decoration:underline;text-decoration-color:rgba(255,185,95,.3);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;overflow:hidden;padding-top:128px;padding-bottom:var(--section-gap);}
.circuit-line{position:absolute;background:rgba(76,215,246,.1);z-index:-1;}
.circuit-line--v{width:1px;height:100%;left:40px;top:0;}
.circuit-line--h{width:100%;height:1px;top:160px;left:0;}

.head{margin-bottom:var(--stack-lg);position:relative;display:flex;flex-direction:column;gap:16px;}
.eyebrow{display:inline-flex;align-items:center;gap:8px;}
.eyebrow__line{width:48px;height:1px;background:var(--primary);}
.eyebrow__text{font-size:14px;color:var(--primary);text-transform:uppercase;letter-spacing:.15em;}
.head__title{font-size:60px;line-height:72px;font-weight:800;letter-spacing:-.02em;color:var(--on-surface);}
.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;}}

/* Projects */
.projects{display:flex;flex-direction:column;gap:var(--stack-lg);margin-top:var(--stack-lg);}
.project{
  display:flex;flex-direction:column;overflow:hidden;border-radius:12px;
  background:var(--surface-container-low);border:1px solid rgba(61,73,76,.2);
  transition:border-color .5s,box-shadow .5s;
}
.project:hover{border-color:var(--primary);box-shadow:0 0 20px rgba(76,215,246,.15);}
.project__media{overflow:hidden;height:256px;}
.project__media img{width:100%;height:100%;object-fit:cover;transition:transform .7s;}
.project:hover .project__media img{transform:scale(1.05);}
.project__body{padding:var(--stack-lg);display:flex;flex-direction:column;justify-content:space-between;gap:var(--stack-lg);}
@media(min-width:768px){
  .project{flex-direction:row;}
  .project--reverse{flex-direction:row-reverse;}
  .project__media{width:50%;height:auto;}
  .project__body{width:50%;}
}
.project__title-row{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;margin-bottom:16px;}
.project__title{font-size:24px;font-weight:600;color:var(--primary);}
.project__icon{color:var(--on-surface-variant);transition:color .2s;}
.project__icon:hover{color:var(--primary);}
.project__blocks{display:flex;flex-direction:column;gap:16px;margin-bottom:24px;}
.project__label{font-size:14px;color:var(--secondary-fixed-dim);text-transform:uppercase;margin-bottom:4px;}
.project__text{color:var(--on-surface-variant);}
.project__role{font-size:14px;color:rgba(221,227,235,.5);font-style:italic;}
.tags{display:flex;flex-wrap:wrap;gap:8px;}
.tag{
  font-family:var(--font-mono);font-size:14px;padding:4px 12px;border-radius:4px;color:var(--primary);
  background:rgba(76,215,246,.05);border:1px solid rgba(76,215,246,.1);
}
.project__actions{display:flex;align-items:center;gap:var(--stack-md);}
.btn-view{
  display:inline-flex;align-items:center;gap:8px;font-family:inherit;font-weight:700;cursor:pointer;
  background:var(--primary);color:var(--on-primary);padding:8px 24px;border:none;border-radius:8px;transition:box-shadow .2s,transform .15s;
}
.btn-view:hover{box-shadow:0 0 15px rgba(76,215,246,.3);}
.btn-view:active{transform:scale(.95);}
.project__gh{display:inline-flex;padding:8px;border:1px solid rgba(61,73,76,.3);border-radius:8px;color:var(--on-surface-variant);transition:border-color .2s,color .2s;}
.project__gh:hover{border-color:var(--secondary);color:var(--secondary);}

/* reveal */
.reveal{opacity:0;transform:translateY(40px);transition:opacity .7s,transform .7s;}
.reveal.active{opacity:1;transform:translateY(0);}