/* ============================================================
   thesagar.com — instrument theme
   One stylesheet for the whole site.
   ============================================================ */

:root{
  /* palette ------------------------------------------------ */
  --ink:      #16202a;   /* deep slate-navy, near black        */
  --ink-2:    #1d2b37;   /* raised dark surface                */
  --paper:    #edefea;   /* cool technical paper               */
  --paper-2:  #f7f8f4;   /* lighter card surface               */
  --sky:      #2f6e8f;   /* calibrated steel-blue — accent     */
  --sky-deep: #21506a;
  --amber:    #c8881e;   /* instrument index tick — used rarely*/
  --rule:     #c9cdc4;   /* hairline on paper                  */
  --rule-dk:  #314150;   /* hairline on ink                    */
  --muted:    #5c6a6f;   /* secondary text on paper            */
  --muted-dk: #93a3ab;   /* secondary text on ink              */

  /* type -------------------------------------------------- */
  --display: "Space Grotesk", system-ui, sans-serif;
  --sans:    "IBM Plex Sans", system-ui, sans-serif;
  --serif:   "IBM Plex Serif", Georgia, serif;
  --mono:    "IBM Plex Mono", ui-monospace, monospace;

  /* metrics ----------------------------------------------- */
  --measure: 68ch;
  --gutter:  clamp(20px, 5vw, 64px);
  --maxw:    1120px;
}

/* reset ---------------------------------------------------- */
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  font-size:clamp(16px,1.05vw,17px);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block}
a{color:inherit}
h1,h2,h3,h4{margin:0;font-weight:500;line-height:1.08;letter-spacing:-0.01em}

/* layout helpers ------------------------------------------ */
.wrap{max-width:var(--maxw);margin-inline:auto;padding-inline:var(--gutter)}
.narrow{max-width:760px}
section{position:relative}

/* eyebrow / mono labels ----------------------------------- */
.eyebrow{
  font-family:var(--mono);
  font-size:.72rem;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--sky);
  margin:0 0 1rem;
}
.eyebrow--ink{color:var(--muted-dk)}

/* ============================================================
   NAV
   ============================================================ */
.nav{
  position:sticky;top:0;z-index:50;
  background:color-mix(in srgb, var(--paper) 86%, transparent);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--rule);
}
.nav__inner{
  max-width:var(--maxw);margin-inline:auto;
  padding:.85rem var(--gutter);
  display:flex;align-items:center;justify-content:space-between;gap:1rem;
}
.brand{
  font-family:var(--mono);font-size:.82rem;letter-spacing:.16em;
  text-transform:uppercase;text-decoration:none;color:var(--ink);
  display:inline-flex;align-items:center;gap:.55rem;font-weight:500;
}
.brand .dot{width:7px;height:7px;background:var(--amber);border-radius:50%;flex:0 0 auto}
.nav__links{display:flex;gap:1.6rem;align-items:center}
.nav__links a{
  font-family:var(--mono);font-size:.74rem;letter-spacing:.1em;
  text-transform:uppercase;text-decoration:none;color:var(--muted);
  padding:.3rem 0;position:relative;transition:color .2s ease;
}
.nav__links a:hover,.nav__links a[aria-current="page"]{color:var(--ink)}
.nav__links a[aria-current="page"]::after{
  content:"";position:absolute;left:0;right:0;bottom:-.35rem;height:2px;background:var(--sky);
}
.nav__toggle{display:none}

/* ============================================================
   HORIZON — the signature element (attitude indicator)
   ============================================================ */
.horizon{
  display:flex;align-items:center;gap:1rem;
  margin:0;color:var(--muted);
}
.horizon__line{flex:1;height:1px;background:var(--rule);position:relative}
.horizon--ink .horizon__line{background:var(--rule-dk)}
.horizon--ink{color:var(--muted-dk)}
.horizon__mark{
  flex:0 0 auto;display:inline-flex;align-items:center;gap:.5rem;
  font-family:var(--mono);font-size:.7rem;letter-spacing:.14em;text-transform:uppercase;
}
.horizon__tick{
  width:10px;height:10px;border:1.5px solid var(--amber);
  transform:rotate(45deg);flex:0 0 auto;
}
.horizon__end{
  font-family:var(--mono);font-size:.68rem;letter-spacing:.12em;color:var(--muted);
  white-space:nowrap;
}
.horizon--ink .horizon__end{color:var(--muted-dk)}

/* ============================================================
   HERO
   ============================================================ */
.hero{
  background:var(--ink);color:var(--paper);
  padding:clamp(4rem,11vh,7.5rem) 0 clamp(3rem,7vh,5rem);
  overflow:hidden;
}
.hero__eyebrow{
  font-family:var(--mono);font-size:.74rem;letter-spacing:.2em;text-transform:uppercase;
  color:var(--muted-dk);margin:0 0 1.6rem;
}
.hero__eyebrow b{color:var(--sky);font-weight:500}
.hero h1{
  font-family:var(--display);
  font-size:clamp(2.4rem,6.4vw,4.6rem);
  font-weight:500;letter-spacing:-0.03em;line-height:1.02;
  max-width:18ch;
}
.hero h1 em{font-style:normal;color:var(--sky)}
.hero__horizon{margin:clamp(2rem,5vh,3.2rem) 0 clamp(1.6rem,4vh,2.4rem)}
.hero__lead{
  font-size:clamp(1.05rem,1.5vw,1.22rem);color:#dfe5e8;max-width:60ch;margin:0 0 2rem;
  line-height:1.6;
}
.hero__cta{display:flex;flex-wrap:wrap;gap:.9rem}

/* buttons -------------------------------------------------- */
.btn{
  display:inline-flex;align-items:center;gap:.6rem;
  font-family:var(--mono);font-size:.78rem;letter-spacing:.08em;text-transform:uppercase;
  text-decoration:none;padding:.85rem 1.4rem;border:1px solid transparent;
  transition:transform .15s ease,background .2s ease,color .2s ease,border-color .2s ease;
}
.btn:hover{transform:translateY(-2px)}
.btn--solid{background:var(--sky);color:#fff}
.btn--solid:hover{background:var(--sky-deep)}
.btn--ghost{border-color:var(--rule-dk);color:var(--paper)}
.btn--ghost:hover{border-color:var(--sky);color:#fff}
.btn--dark{background:var(--ink);color:var(--paper)}
.btn--dark:hover{background:var(--ink-2)}
.btn .arw{transition:transform .2s ease}
.btn:hover .arw{transform:translateX(3px)}

/* ============================================================
   GENERIC SECTION
   ============================================================ */
.band{padding:clamp(3.5rem,9vh,6rem) 0}
.band--paper2{background:var(--paper-2)}
.band--ink{background:var(--ink);color:var(--paper)}
.band--ink h2,.band--ink h3{color:var(--paper)}

.section-head{max-width:var(--measure)}
.section-head h2{
  font-family:var(--display);font-weight:500;
  font-size:clamp(1.7rem,3.4vw,2.5rem);letter-spacing:-0.02em;
}
.section-head p{color:var(--muted);font-size:1.05rem;margin:1rem 0 0;max-width:58ch}
.band--ink .section-head p{color:var(--muted-dk)}

/* ============================================================
   ROUTES (home two-up)
   ============================================================ */
.routes{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--rule);
  border:1px solid var(--rule);margin-top:2.6rem}
.route{
  background:var(--paper);padding:clamp(1.8rem,3.5vw,2.6rem);
  text-decoration:none;color:inherit;display:flex;flex-direction:column;gap:.8rem;
  min-height:230px;transition:background .2s ease;
}
.route:hover{background:var(--paper-2)}
.route__ix{font-family:var(--mono);font-size:.72rem;letter-spacing:.16em;color:var(--sky)}
.route h3{font-family:var(--display);font-size:1.5rem;font-weight:500}
.route p{color:var(--muted);margin:0;flex:1}
.route__go{font-family:var(--mono);font-size:.74rem;letter-spacing:.1em;text-transform:uppercase;
  color:var(--ink);display:inline-flex;gap:.5rem;align-items:center}
.route__go .arw{color:var(--sky);transition:transform .2s ease}
.route:hover .route__go .arw{transform:translateX(3px)}

/* ============================================================
   SERVICES GRID (Yantra)
   ============================================================ */
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--rule-dk);
  border:1px solid var(--rule-dk);margin-top:2.6rem}
.cell{background:var(--ink);padding:clamp(1.6rem,3vw,2.2rem);display:flex;flex-direction:column;gap:.7rem}
.cell__ref{font-family:var(--mono);font-size:.68rem;letter-spacing:.16em;color:var(--amber);text-transform:uppercase}
.cell h3{font-family:var(--display);font-size:1.28rem;font-weight:500;color:var(--paper)}
.cell p{color:var(--muted-dk);margin:0;font-size:.98rem}

/* WHY list ------------------------------------------------- */
.why{display:grid;gap:1px;background:var(--rule);border-block:1px solid var(--rule);margin-top:2.4rem}
.why__row{
  background:var(--paper-2);display:grid;grid-template-columns:minmax(0,18ch) 1fr;gap:1.4rem;
  padding:1.5rem clamp(1rem,2.5vw,1.6rem);align-items:start;
}
.why__row h3{font-family:var(--mono);font-size:.8rem;letter-spacing:.06em;font-weight:500;
  color:var(--sky-deep);text-transform:uppercase;padding-top:.2rem}
.why__row p{margin:0;color:var(--ink)}

/* ============================================================
   WRITING LIST
   ============================================================ */
.posts{margin-top:2.6rem;border-top:1px solid var(--rule)}
.post-row{
  display:grid;grid-template-columns:minmax(0,12ch) 1fr;gap:clamp(1rem,3vw,2.4rem);
  padding:1.7rem 0;border-bottom:1px solid var(--rule);
  text-decoration:none;color:inherit;transition:padding-left .2s ease;
}
.post-row:hover{padding-left:.6rem}
.post-row__meta{font-family:var(--mono);font-size:.7rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.post-row__meta .cat{color:var(--sky);display:block;margin-bottom:.3rem}
.post-row h3{font-family:var(--display);font-size:clamp(1.3rem,2.6vw,1.7rem);font-weight:500;margin-bottom:.5rem}
.post-row p{margin:0;color:var(--muted);max-width:60ch}
.post-row__go{font-family:var(--mono);font-size:.72rem;color:var(--sky);margin-top:.7rem;display:inline-flex;gap:.4rem}
.post-row:hover .post-row__go .arw{transform:translateX(3px)}
.post-row__go .arw{transition:transform .2s ease}

/* ============================================================
   ARTICLE
   ============================================================ */
.article{padding:clamp(2.6rem,7vh,4.5rem) 0 clamp(3rem,8vh,5rem)}
.article__head{max-width:760px;margin-inline:auto}
.article__meta{font-family:var(--mono);font-size:.72rem;letter-spacing:.12em;text-transform:uppercase;
  color:var(--muted);display:flex;gap:1rem;flex-wrap:wrap;margin-bottom:1.4rem}
.article__meta .cat{color:var(--sky)}
.article__head h1{font-family:var(--display);font-weight:500;
  font-size:clamp(2rem,5vw,3.1rem);letter-spacing:-0.02em;max-width:20ch}
.article__body{max-width:680px;margin:clamp(2rem,5vh,3rem) auto 0;font-family:var(--serif);
  font-size:1.16rem;line-height:1.78}
.article__body p{margin:0 0 1.4rem}
.article__body blockquote{
  margin:2rem 0;padding:.4rem 0 .4rem 1.6rem;border-left:2px solid var(--amber);
  font-style:italic;color:var(--ink)}
.article__body h2{font-family:var(--display);font-size:1.5rem;margin:2.4rem 0 1rem}
.article__body .lead-in{font-weight:600;font-style:normal}
.back-link{font-family:var(--mono);font-size:.74rem;letter-spacing:.1em;text-transform:uppercase;
  color:var(--sky);text-decoration:none;display:inline-flex;gap:.5rem;align-items:center}
.back-link .arw{transition:transform .2s ease}
.back-link:hover .arw{transform:translateX(-3px)}

/* ============================================================
   CONTACT
   ============================================================ */
.contact-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:clamp(2rem,5vw,4rem);align-items:start;margin-top:2.6rem}
.contact-card{border:1px solid var(--rule-dk);padding:clamp(1.6rem,3vw,2.2rem);background:var(--ink-2)}
.contact-card dl{margin:0;display:grid;gap:1.3rem}
.contact-card dt{font-family:var(--mono);font-size:.68rem;letter-spacing:.16em;text-transform:uppercase;color:var(--amber);margin-bottom:.35rem}
.contact-card dd{margin:0;font-size:1.08rem}
.contact-card a{color:var(--paper);text-decoration:none;border-bottom:1px solid var(--rule-dk);transition:border-color .2s}
.contact-card a:hover{border-color:var(--sky)}

/* ============================================================
   FOOTER
   ============================================================ */
.footer{background:var(--ink);color:var(--muted-dk);padding:clamp(2.5rem,6vh,4rem) 0 2.2rem;border-top:1px solid var(--rule-dk)}
.footer__top{display:flex;justify-content:space-between;gap:2rem;flex-wrap:wrap;align-items:flex-start}
.footer__bio{max-width:46ch;color:#cdd7dc;font-size:.98rem}
.footer__bio .name{font-family:var(--display);font-size:1.3rem;color:var(--paper);display:block;margin-bottom:.6rem}
.footer__nav{display:grid;gap:.6rem}
.footer__nav a{font-family:var(--mono);font-size:.76rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted-dk);text-decoration:none}
.footer__nav a:hover{color:var(--paper)}
.footer__base{margin-top:2.6rem;padding-top:1.4rem;border-top:1px solid var(--rule-dk);
  display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;
  font-family:var(--mono);font-size:.68rem;letter-spacing:.1em;color:var(--muted-dk);text-transform:uppercase}

/* ============================================================
   MOTION (progressive, safe without JS)
   ============================================================ */
.js .reveal{opacity:0;transform:translateY(14px);transition:opacity .7s ease,transform .7s ease}
.js .reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion: reduce){
  .js .reveal{opacity:1;transform:none;transition:none}
  *{scroll-behavior:auto !important}
}

/* focus ---------------------------------------------------- */
a:focus-visible,.btn:focus-visible,.route:focus-visible,.post-row:focus-visible{
  outline:2px solid var(--sky);outline-offset:3px}
.hero a:focus-visible,.band--ink a:focus-visible{outline-color:#7fb6cf}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width:760px){
  .routes,.grid-2,.contact-grid{grid-template-columns:1fr}
  .why__row{grid-template-columns:1fr;gap:.4rem}
  .post-row{grid-template-columns:1fr;gap:.5rem}
  .nav__links{gap:1rem}
  .nav__links a{font-size:.68rem}
  .footer__top{flex-direction:column}
}
@media (max-width:440px){
  .horizon__end{display:none}
}