/* =====================================================================
   Monterivajersy — Technical Water Engineering Blueprint
   Light "drawing sheet" system with deep-slate blueprint panels.
   Type: IBM Plex Serif (headings) · IBM Plex Sans (body) · IBM Plex Mono (data)
   ===================================================================== */

:root{
  --slate:#0E1A24;       /* Deep Slate    */
  --steel:#2C4A63;       /* Steel Blue    */
  --cyan:#2EC4B6;        /* Cyan Water    */
  --aqua:#7DE2D1;        /* Soft Aqua     */
  --paper:#F4F7FB;       /* Blueprint Paper */
  --ink:#101820;         /* Ink Black     */

  --paper-2:#EAEFF6;     /* slightly deeper paper for blocks */
  --line:#C5D2DF;        /* drawing line on paper */
  --line-2:#D9E2EC;      /* faint grid on paper */
  --muted:#4A5F70;       /* muted ink */
  --muted-2:#6E8194;
  --slate-line:rgba(125,226,209,.16);  /* cyan grid on slate panels */
  --warn:#E0913B;        /* annotation amber for "elevated" readings */
  --crit:#D9694B;        /* high reading */

  --sans:"IBM Plex Sans",system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  --serif:"IBM Plex Serif",Georgia,"Times New Roman",serif;
  --mono:"IBM Plex Mono",ui-monospace,"SF Mono",Menlo,Consolas,monospace;

  --wrap:1180px;
  --r:4px;               /* sharp, technical corners */
  --ease:cubic-bezier(.22,.61,.36,1);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth;overflow-x:hidden}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:var(--sans);font-size:17px;line-height:1.66;
  overflow-x:clip;max-width:100%;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  /* blueprint grid on paper */
  background-image:
    linear-gradient(var(--line-2) 1px,transparent 1px),
    linear-gradient(90deg,var(--line-2) 1px,transparent 1px);
  background-size:28px 28px;
  background-position:-1px -1px;
}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}

h1,h2,h3,h4{font-family:var(--serif);font-weight:600;line-height:1.16;color:var(--ink);letter-spacing:-.01em}
h1{font-size:clamp(2.1rem,5vw,3.4rem)}
h2{font-size:clamp(1.5rem,3vw,2.1rem);margin:0 0 .5em}
h3{font-size:1.18rem;margin:0 0 .4em}
p{margin:0 0 1.05em}
a{color:var(--steel);text-decoration:none;transition:color .18s}
a:hover{color:var(--cyan)}
strong{font-weight:600}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px;min-width:0}
.skip{position:absolute;left:-9999px;top:0;background:var(--slate);color:#fff;padding:10px 16px;z-index:200}
.skip:focus{left:8px;top:8px}

/* ---------- monospace technical label ---------- */
.tag{font-family:var(--mono);font-size:.7rem;font-weight:500;letter-spacing:.18em;
  text-transform:uppercase;color:var(--steel)}
.tag-cyan{color:var(--cyan)}

/* ---------- reading progress ---------- */
.progress{position:fixed;top:0;left:0;height:2px;width:0;background:var(--cyan);z-index:120;
  transition:width .1s linear;pointer-events:none}

/* =====================================================================
   HEADER  (drawing-sheet header bar)
   ===================================================================== */
.head{position:sticky;top:0;z-index:90;background:rgba(244,247,251,.92);
  backdrop-filter:saturate(1.2) blur(8px);border-bottom:1px solid var(--line)}
.head-row{display:flex;align-items:center;gap:22px;height:64px}
.brand{display:flex;align-items:center;gap:11px;flex-shrink:0}
.brand .glyph{width:30px;height:30px;flex:none}
.brand b{font-family:var(--serif);font-size:1.16rem;font-weight:600;letter-spacing:-.01em;color:var(--ink);line-height:1}
.brand .sub{display:block;font-family:var(--mono);font-size:.56rem;letter-spacing:.24em;color:var(--muted-2);text-transform:uppercase;margin-top:3px}
.nav{display:flex;align-items:center;gap:2px;margin-left:auto;flex-wrap:wrap}
.nav a{font-family:var(--sans);font-size:.86rem;font-weight:500;color:var(--muted);
  padding:7px 10px;border-radius:var(--r);white-space:nowrap}
.nav a:hover{color:var(--ink);background:var(--paper-2)}
.nav a.on{color:var(--slate);background:var(--paper-2)}
.nav a.cta{color:var(--slate);border:1px solid var(--cyan);background:rgba(46,196,182,.08)}
.nav a.cta:hover{background:var(--cyan);color:#06231f}
.menu-btn{display:none;margin-left:auto;width:42px;height:42px;border:1px solid var(--line);
  background:transparent;border-radius:var(--r);cursor:pointer;color:var(--slate);align-items:center;justify-content:center;
  position:relative;z-index:97;-webkit-tap-highlight-color:transparent}
.menu-btn svg{width:20px;height:20px;pointer-events:none}
.scrim{position:fixed;inset:0;background:rgba(14,26,36,.45);opacity:0;visibility:hidden;
  pointer-events:none;transition:opacity .25s,visibility .25s;z-index:95}
.scrim.on{opacity:1;visibility:visible;pointer-events:auto}
body.nav-open{overflow:hidden;touch-action:none}

/* ---------- breadcrumb ---------- */
.crumb{font-family:var(--mono);font-size:.72rem;letter-spacing:.04em;color:var(--muted-2);
  padding:14px 0 0;display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--cyan)}
.crumb span[aria-current]{color:var(--steel)}

/* =====================================================================
   HERO  (engineering title sheet)
   ===================================================================== */
.hero{position:relative;padding:54px 0 8px}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center}
.hero h1{margin:.18em 0 .35em}
.hero .lead{font-size:1.16rem;color:var(--muted);max-width:48ch;margin-bottom:1.4em}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:6px}

/* blueprint diagram panel (dark) */
.sheet{position:relative;background:var(--slate);border-radius:6px;border:1px solid #16323f;
  overflow:hidden;min-height:330px;color:var(--aqua);
  background-image:
    linear-gradient(var(--slate-line) 1px,transparent 1px),
    linear-gradient(90deg,var(--slate-line) 1px,transparent 1px);
  background-size:26px 26px}
.sheet .corner{position:absolute;width:13px;height:13px;border:1.5px solid var(--cyan)}
.sheet .corner.tl{top:10px;left:10px;border-right:0;border-bottom:0}
.sheet .corner.tr{top:10px;right:10px;border-left:0;border-bottom:0}
.sheet .corner.bl{bottom:10px;left:10px;border-right:0;border-top:0}
.sheet .corner.br{bottom:10px;right:10px;border-left:0;border-top:0}
.sheet svg{display:block;width:100%;height:100%}
/* animated flow dash */
.flowline{stroke:var(--cyan);stroke-width:2;fill:none;stroke-dasharray:7 10;
  animation:flow 1.5s linear infinite}
@keyframes flow{to{stroke-dashoffset:-34}}
.fill-anim{transition:none}

/* title block (CAD-style) */
.titleblock{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line);
  border-radius:var(--r);overflow:hidden;margin-top:26px;background:#fff}
.titleblock .cell{padding:10px 14px;border-right:1px solid var(--line)}
.titleblock .cell:last-child{border-right:0}
.titleblock .k{font-family:var(--mono);font-size:.6rem;letter-spacing:.16em;text-transform:uppercase;color:var(--muted-2);display:block}
.titleblock .v{font-family:var(--mono);font-size:.92rem;color:var(--slate);margin-top:3px;font-weight:500}

/* =====================================================================
   BUTTONS
   ===================================================================== */
.btn{display:inline-flex;align-items:center;gap:9px;font-family:var(--sans);font-weight:600;
  font-size:.94rem;padding:12px 20px;border-radius:var(--r);cursor:pointer;border:1px solid transparent;transition:.2s;
  touch-action:manipulation;-webkit-tap-highlight-color:transparent}
.btn svg{width:17px;height:17px}
.btn-cyan{background:var(--cyan);color:#06231f}
.btn-cyan:hover{background:var(--aqua);color:#06231f}
.btn-ghost{background:transparent;border-color:var(--steel);color:var(--slate)}
.btn-ghost:hover{border-color:var(--cyan);color:var(--steel);background:rgba(46,196,182,.07)}

/* =====================================================================
   SECTIONS / SPEC BLOCKS
   ===================================================================== */
section{padding:34px 0}
.sec-head{display:flex;align-items:baseline;gap:14px;margin-bottom:20px;
  border-bottom:1px solid var(--line);padding-bottom:12px}
.sec-head .fig{font-family:var(--mono);font-size:.74rem;letter-spacing:.12em;color:var(--cyan);
  flex:none;padding-top:5px}
.sec-head h2{margin:0}
.lede{font-size:1.12rem;color:var(--muted);max-width:70ch}

.grid{display:grid;gap:18px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}

/* spec block card */
.spec{position:relative;display:block;background:#fff;border:1px solid var(--line);border-radius:var(--r);
  padding:22px 22px 20px;color:inherit;touch-action:manipulation}
.spec::before{content:"";position:absolute;left:0;top:18px;bottom:18px;width:3px;background:var(--cyan);border-radius:3px}
.spec h3{margin:0 0 .35em}
.spec p{margin:0;color:var(--muted);font-size:.97rem}
.spec .num{font-family:var(--mono);font-size:.66rem;letter-spacing:.14em;color:var(--muted-2);display:block;margin-bottom:8px}

.prose{max-width:74ch}
.prose h2{margin-top:1.4em}
.prose h3{margin-top:1.3em;color:var(--steel)}
.prose ul,.prose ol{margin:0 0 1.1em;padding-left:1.25em}
.prose li{margin:.3em 0}
.prose li::marker{color:var(--cyan)}

/* annotation callout */
.note{background:var(--paper-2);border:1px solid var(--line);border-left:3px solid var(--cyan);
  border-radius:var(--r);padding:16px 18px;margin:1.3em 0}
.note .k{font-family:var(--mono);font-size:.66rem;letter-spacing:.16em;text-transform:uppercase;color:var(--steel);display:block;margin-bottom:6px}
.note p{margin:0;font-size:.96rem;color:var(--muted)}
.note.warn{border-left-color:var(--warn)}

/* data figure (paper) with measurement feel */
.figure{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:20px 22px;margin:1.2em 0}
.figure .cap{font-family:var(--mono);font-size:.66rem;letter-spacing:.14em;text-transform:uppercase;color:var(--muted-2);margin-bottom:14px}

/* =====================================================================
   TANK FILL BARS (vertical, water-level)
   ===================================================================== */
.tanks{display:flex;gap:18px;align-items:flex-end;flex-wrap:wrap}
.tank{flex:1;min-width:74px;text-align:center}
.tank .vessel{position:relative;height:150px;border:1.5px solid var(--steel);border-radius:3px;
  background:repeating-linear-gradient(0deg,transparent,transparent 23px,var(--line-2) 23px,var(--line-2) 24px);
  overflow:hidden}
.tank .water{position:absolute;left:0;right:0;bottom:0;height:0;
  background:linear-gradient(180deg,var(--aqua),var(--cyan));transition:height 1.1s var(--ease)}
.tank .water::before{content:"";position:absolute;top:-5px;left:0;right:0;height:8px;
  background:var(--aqua);opacity:.55;border-radius:50%}
.tank .pct{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  font-family:var(--mono);font-weight:600;font-size:.92rem;color:var(--slate);z-index:2;mix-blend-mode:luminosity}
.tank .lbl{font-family:var(--mono);font-size:.7rem;letter-spacing:.06em;color:var(--muted);margin-top:8px;display:block}

/* horizontal fluid bars (rainfall chart / loss style) */
.bars{display:flex;flex-direction:column;gap:13px}
.bar{}
.bar .top{display:flex;justify-content:space-between;font-family:var(--mono);font-size:.78rem;color:var(--steel);margin-bottom:5px}
.bar .top .v{color:var(--slate);font-weight:600}
.bar .track{height:14px;background:var(--paper-2);border:1px solid var(--line);border-radius:3px;overflow:hidden}
.bar .fluid{height:100%;width:0;background:linear-gradient(90deg,var(--steel),var(--cyan));
  transition:width 1s var(--ease)}
.bar.hi .fluid{background:linear-gradient(90deg,var(--cyan),var(--aqua))}

/* =====================================================================
   RAINFALL CHART (city columns)
   ===================================================================== */
.chart{display:flex;align-items:flex-end;gap:12px;height:230px;padding:10px 4px 0;
  border-bottom:1px solid var(--line);position:relative}
.chart .col{flex:1;display:flex;flex-direction:column;justify-content:flex-end;align-items:center;height:100%;gap:6px}
.chart .col .bar2{width:100%;max-width:46px;background:linear-gradient(180deg,var(--cyan),var(--steel));
  border-radius:3px 3px 0 0;height:0;transition:height 1s var(--ease);position:relative}
.chart .col .mm{font-family:var(--mono);font-size:.66rem;color:var(--slate);font-weight:600}
.chart .col .city{font-family:var(--mono);font-size:.62rem;letter-spacing:.04em;color:var(--muted);text-transform:uppercase}
.chart-note{font-family:var(--mono);font-size:.66rem;color:var(--muted-2);margin-top:10px;letter-spacing:.04em}

/* =====================================================================
   REGION CARDS (rainfall)
   ===================================================================== */
.regions{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px;margin-bottom:22px}
.region-btn{font-family:var(--mono);font-size:.78rem;letter-spacing:.04em;padding:11px 12px;
  border:1px solid var(--line);background:#fff;border-radius:var(--r);cursor:pointer;color:var(--muted);
  text-transform:uppercase;transition:.18s;text-align:left}
.region-btn:hover{border-color:var(--cyan);color:var(--slate)}
.region-btn[aria-pressed=true]{background:var(--slate);color:var(--aqua);border-color:var(--slate)}
.region-panel{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:24px}
.region-panel h3{font-size:1.4rem;margin-bottom:.1em}
.metrics{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:1px;background:var(--line);
  border:1px solid var(--line);border-radius:var(--r);overflow:hidden;margin:18px 0}
.metric{background:#fff;padding:13px 15px}
.metric .mk{font-family:var(--mono);font-size:.62rem;letter-spacing:.12em;text-transform:uppercase;color:var(--muted-2)}
.metric .mv{font-family:var(--serif);font-size:1.15rem;color:var(--slate);margin-top:3px}

/* =====================================================================
   ESTIMATOR
   ===================================================================== */
.est{display:grid;grid-template-columns:.92fr 1.08fr;gap:26px;align-items:start}
.est-panel{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:24px}
.est-out{background:var(--slate);border:1px solid #16323f;border-radius:6px;padding:24px;color:var(--aqua);
  background-image:linear-gradient(var(--slate-line) 1px,transparent 1px),linear-gradient(90deg,var(--slate-line) 1px,transparent 1px);
  background-size:26px 26px}
.field{margin-bottom:20px}
.field label{display:block;font-family:var(--mono);font-size:.7rem;letter-spacing:.12em;text-transform:uppercase;color:var(--steel);margin-bottom:8px}
.field .hint{font-family:var(--sans);font-size:.8rem;color:var(--muted-2);text-transform:none;letter-spacing:0;margin-top:4px}
.range-row{display:flex;align-items:center;gap:14px}
input[type=range]{flex:1;accent-color:var(--cyan);height:4px}
.range-val{font-family:var(--mono);font-weight:600;color:var(--slate);min-width:78px;text-align:right}
.seg{display:flex;gap:8px;flex-wrap:wrap}
.seg button{font-family:var(--mono);font-size:.76rem;padding:9px 13px;border:1px solid var(--line);
  background:var(--paper);border-radius:var(--r);cursor:pointer;color:var(--muted);transition:.18s;text-transform:uppercase;letter-spacing:.04em;
  touch-action:manipulation;-webkit-tap-highlight-color:transparent}
.seg button:hover{border-color:var(--cyan);color:var(--slate)}
.seg button[aria-pressed=true]{background:var(--cyan);color:#06231f;border-color:var(--cyan);font-weight:600}

.est-out .ohead{font-family:var(--mono);font-size:.66rem;letter-spacing:.16em;text-transform:uppercase;color:var(--cyan);margin-bottom:6px}
.bigfig{font-family:var(--serif);font-size:2.7rem;color:#fff;line-height:1;margin:2px 0}
.bigfig small{font-family:var(--mono);font-size:.8rem;color:var(--aqua);letter-spacing:.04em}
.est-out .range{font-family:var(--mono);font-size:.86rem;color:var(--aqua);margin-bottom:18px}
.est-out hr{border:0;border-top:1px solid var(--slate-line);margin:18px 0}
.season{display:flex;align-items:flex-end;gap:7px;height:96px;margin:6px 0 4px}
.season .s{flex:1;display:flex;flex-direction:column;justify-content:flex-end;align-items:center;gap:5px;height:100%}
.season .s .sb{width:100%;background:linear-gradient(180deg,var(--aqua),var(--cyan));border-radius:2px 2px 0 0;height:0;transition:height .9s var(--ease)}
.season .s .sl{font-family:var(--mono);font-size:.56rem;color:var(--muted-2);letter-spacing:.02em}
.overflow-ind{display:flex;align-items:center;gap:10px;font-family:var(--mono);font-size:.82rem;margin-top:6px}
.dot{width:11px;height:11px;border-radius:50%;flex:none}
.est-empty{color:var(--muted-2);font-family:var(--mono);font-size:.86rem;text-align:center;padding:40px 10px}

/* =====================================================================
   FAQ
   ===================================================================== */
.faq-search{margin-bottom:18px}
.faq-search input{width:100%;font-family:var(--sans);font-size:.95rem;padding:12px 16px;
  border:1px solid var(--line);border-radius:var(--r);background:#fff;color:var(--ink)}
.faq-search input:focus{outline:2px solid var(--cyan);outline-offset:1px}
details.qa{border:1px solid var(--line);border-radius:var(--r);background:#fff;margin-bottom:9px;overflow:hidden}
details.qa summary{list-style:none;cursor:pointer;padding:15px 46px 15px 18px;position:relative;
  font-family:var(--serif);font-size:1.03rem;color:var(--slate);font-weight:500}
details.qa summary::-webkit-details-marker{display:none}
details.qa summary::after{content:"+";position:absolute;right:18px;top:50%;transform:translateY(-50%);
  font-family:var(--mono);font-size:1.3rem;color:var(--cyan);transition:transform .2s}
details.qa[open] summary::after{content:"\2212"}
details.qa .a{padding:0 18px 16px;color:var(--muted);font-size:.97rem}
.faq-cat{font-family:var(--mono);font-size:.7rem;letter-spacing:.16em;text-transform:uppercase;
  color:var(--steel);margin:26px 0 10px}
.filter-hide{display:none!important}

/* =====================================================================
   FORM
   ===================================================================== */
.form{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:26px;max-width:560px}
.form .row{margin-bottom:16px}
.form label{display:block;font-family:var(--mono);font-size:.7rem;letter-spacing:.12em;text-transform:uppercase;color:var(--steel);margin-bottom:7px}
.form input,.form textarea{width:100%;font-family:var(--sans);font-size:.96rem;padding:11px 14px;
  border:1px solid var(--line);border-radius:var(--r);background:var(--paper);color:var(--ink)}
.form input:focus,.form textarea:focus{outline:2px solid var(--cyan);outline-offset:1px;background:#fff}
.form textarea{min-height:128px;resize:vertical}
.form .row.bad input,.form .row.bad textarea{border-color:var(--crit)}
.form .err{display:none;color:var(--crit);font-family:var(--mono);font-size:.72rem;margin-top:5px}
.form .row.bad .err{display:block}
.ok-msg{display:none;background:var(--slate);border:1px solid #16323f;border-radius:6px;padding:30px;color:var(--aqua);max-width:560px}
.ok-msg.show{display:block}
.ok-msg h3{color:#fff}

/* =====================================================================
   FOOTER (drawing title block)
   ===================================================================== */
.foot{margin-top:40px;background:var(--slate);color:#B9CAD6;
  background-image:linear-gradient(var(--slate-line) 1px,transparent 1px),linear-gradient(90deg,var(--slate-line) 1px,transparent 1px);
  background-size:26px 26px}
.foot .wrap{padding:44px 24px 30px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:30px}
.foot h4{font-family:var(--mono);font-size:.68rem;letter-spacing:.16em;text-transform:uppercase;color:var(--cyan);margin:0 0 12px}
.foot a{display:block;color:#B9CAD6;font-size:.9rem;padding:3px 0}
.foot a:hover{color:var(--aqua)}
.foot .brand b{color:#fff}
.foot .brand .sub{color:var(--muted-2)}
.foot p{font-size:.86rem;color:#8FA3B2;max-width:42ch}
.foot-base{border-top:1px solid var(--slate-line);margin-top:30px;padding-top:18px;
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-family:var(--mono);font-size:.7rem;letter-spacing:.04em;color:#7E92A2}

/* ---------- scroll reveal ---------- */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* =====================================================================
   RESPONSIVE
   ===================================================================== */
@media(max-width:980px){
  .hero-grid{grid-template-columns:1fr;gap:28px}
  .sheet{min-height:280px}
  .est{grid-template-columns:1fr}
  .g3{grid-template-columns:repeat(2,1fr)}
  .foot-grid{grid-template-columns:1fr 1fr}
  .head{z-index:100;background:var(--paper);backdrop-filter:none;-webkit-backdrop-filter:none}
  .head-row{position:relative;z-index:101}
  .menu-btn{display:flex}
  .nav{position:fixed;top:0;right:0;height:100dvh;width:min(82vw,330px);background:var(--paper);
    flex-direction:column;align-items:stretch;gap:0;padding:78px 20px 24px;
    transform:translateX(100%);transition:transform .3s var(--ease);z-index:99;
    border-left:1px solid var(--line);overflow-y:auto;margin-left:0;flex-wrap:nowrap;
    pointer-events:none}
  .nav.on{transform:none;pointer-events:auto}
  .nav a{padding:13px 12px;border-radius:var(--r);font-size:1rem;border-bottom:1px solid var(--line-2)}
  .nav a.cta{margin-top:10px;text-align:center;border-bottom:1px solid var(--cyan)}
}
@media(max-width:760px){
  body{font-size:16px}
  .g2,.g3{grid-template-columns:1fr}
  .titleblock{grid-template-columns:repeat(2,1fr)}
  .titleblock .cell:nth-child(2){border-right:0}
  .titleblock .cell:nth-child(1),.titleblock .cell:nth-child(2){border-bottom:1px solid var(--line)}
  .foot-grid{grid-template-columns:1fr}
  .figure{overflow-x:auto;-webkit-overflow-scrolling:touch;max-width:100%}
  .chart{gap:6px}
  .chart .col{min-width:36px}
  .chart .col .city{font-size:.54rem}
}