/* ===========================================================================
   HydroGeoRisk — main stylesheet (responsive, RTL/LTR)
   =========================================================================== */
:root{
  --c-primary:#0e7490; --c-primary-2:#06b6d4; --c-cyan:#22d3ee;
  --c-ink:#0f172a; --c-ink-2:#1e293b; --c-slate:#475569; --c-muted:#64748b;
  --c-bg:#f6f9fb; --c-card:#ffffff; --c-line:#e2e8f0;
  --r-stable:#16a34a; --r-warning:#f59e0b; --r-alert:#ef4444; --r-critical:#7f1d1d;
  --radius:16px; --shadow:0 10px 30px rgba(15,23,42,.08); --shadow-lg:0 24px 60px rgba(15,23,42,.16);
  --container:1140px;
  --font-ar:'Tajawal','Inter',system-ui,sans-serif;
  --font-en:'Inter','Tajawal',system-ui,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--c-bg);color:var(--c-ink);font-family:var(--font-ar);line-height:1.65;-webkit-font-smoothing:antialiased}
body.lang-en{font-family:var(--font-en)}
img{max-width:100%}
a{color:var(--c-primary);text-decoration:none}
h1,h2,h3,h4{line-height:1.25;margin:0 0 .5em}
.container{max-width:var(--container);margin:0 auto;padding:0 20px}
section{padding:84px 0}
.section-head{text-align:center;max-width:720px;margin:0 auto 48px}
.section-head h2{font-size:clamp(26px,4vw,38px);margin-bottom:10px}
.section-head p{color:var(--c-slate);font-size:18px;margin:0}
.eyebrow{display:inline-block;font-size:13px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;
  color:var(--c-primary);background:rgba(6,182,212,.1);padding:6px 14px;border-radius:999px;margin-bottom:14px}

/* ---- buttons ---- */
.btn{display:inline-flex;align-items:center;gap:8px;border:0;cursor:pointer;font-family:inherit;
  font-weight:700;font-size:16px;padding:13px 24px;border-radius:12px;transition:.2s;text-decoration:none}
.btn-primary{background:linear-gradient(135deg,var(--c-primary-2),var(--c-primary));color:#fff;
  box-shadow:0 10px 24px rgba(6,182,212,.35)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 34px rgba(6,182,212,.45)}
.btn-ghost{background:rgba(255,255,255,.12);color:#fff;border:1px solid rgba(255,255,255,.35)}
.btn-ghost:hover{background:rgba(255,255,255,.22)}
.btn-outline{background:#fff;color:var(--c-primary);border:1.5px solid var(--c-line)}
.btn-outline:hover{border-color:var(--c-primary-2)}

/* ---- navbar ---- */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.85);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--c-line)}
.nav-inner{display:flex;align-items:center;gap:18px;height:68px}
.nav-brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;color:var(--c-ink);font-family:var(--font-en)}
.nav-links{display:flex;align-items:center;gap:6px;margin-inline-start:auto}
.nav-links a{color:var(--c-ink-2);font-weight:600;font-size:15px;padding:8px 12px;border-radius:9px;transition:.15s}
.nav-links a:hover{background:rgba(6,182,212,.1);color:var(--c-primary)}
.nav-links a.cta{background:var(--c-primary);color:#fff}
.nav-links a.cta:hover{background:var(--c-primary-2);color:#fff}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;padding:8px;margin-inline-start:auto}
.nav-toggle span{display:block;width:24px;height:2px;background:var(--c-ink);margin:5px 0;transition:.2s}

/* ---- hero ---- */
.hero{position:relative;color:#e2e8f0;padding:96px 0 110px;overflow:hidden;
  background:radial-gradient(900px 500px at 80% -10%,#155e75 0,transparent 55%),
             linear-gradient(160deg,#0b1220,#0f172a 55%,#0b2a33)}
.hero::after{content:"";position:absolute;inset:0;opacity:.06;
  background-image:repeating-radial-gradient(circle at 25% 30%,#67e8f9 0 1px,transparent 1px 28px),
                   repeating-radial-gradient(circle at 80% 75%,#67e8f9 0 1px,transparent 1px 36px)}
.hero .container{position:relative;z-index:2;max-width:820px;text-align:center}
.hero h1{font-size:clamp(30px,5.2vw,52px);font-weight:800;margin-bottom:18px;
  background:linear-gradient(90deg,#e2e8f0,#a5f3fc);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{font-size:clamp(16px,2.2vw,20px);color:#cbd5e1;max-width:680px;margin:0 auto 30px}
.hero-cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.hero-stats{display:flex;gap:34px;justify-content:center;flex-wrap:wrap;margin-top:54px}
.hero-stat{text-align:center}
.hero-stat .num{font-size:36px;font-weight:800;color:#67e8f9;font-family:var(--font-en)}
.hero-stat .lbl{font-size:14px;color:#94a3b8}

/* ---- cards grid ---- */
.grid{display:grid;gap:22px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--radius);padding:26px;
  box-shadow:var(--shadow);transition:.2s}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.card .ic{width:52px;height:52px;border-radius:13px;display:grid;place-items:center;margin-bottom:16px;
  background:linear-gradient(135deg,rgba(6,182,212,.15),rgba(14,116,144,.15));color:var(--c-primary)}
.card h3{font-size:19px;margin-bottom:8px}
.card p{color:var(--c-slate);margin:0;font-size:15.5px}

/* ---- about ---- */
.about-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:46px;align-items:center}
.about-lead{font-size:19px;color:var(--c-ink-2);font-weight:500;margin-bottom:16px}
.about-grid p{color:var(--c-slate);font-size:16px}
.value-list{list-style:none;padding:0;margin:0;display:grid;gap:12px}
.value-list li{display:flex;gap:12px;align-items:flex-start;background:var(--c-card);border:1px solid var(--c-line);
  border-radius:12px;padding:14px 16px;box-shadow:var(--shadow);font-weight:500}
.value-list .chk{color:var(--c-primary-2);flex:0 0 auto;margin-top:2px}

/* ---- how steps ---- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.step{position:relative;background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--radius);
  padding:26px;box-shadow:var(--shadow)}
.step .n{width:42px;height:42px;border-radius:50%;display:grid;place-items:center;font-weight:800;color:#fff;
  background:linear-gradient(135deg,var(--c-primary-2),var(--c-primary));margin-bottom:14px;font-family:var(--font-en)}
.step h3{font-size:18px}
.step p{color:var(--c-slate);font-size:15px;margin:0}

/* ---- section tones ---- */
.tone-soft{background:linear-gradient(180deg,#eef6f9,#f6f9fb)}
.tone-dark{background:linear-gradient(160deg,#0b1220,#0f2730);color:#e2e8f0}
.tone-dark .section-head p{color:#94a3b8}

/* ---- calculator ---- */
.calc-wrap{display:grid;grid-template-columns:380px 1fr;gap:28px;align-items:start}
.calc-form{background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow);position:sticky;top:84px}
.field{margin-bottom:18px}
.field label{display:block;font-weight:600;margin-bottom:7px;font-size:14.5px;color:var(--c-ink-2)}
.field .val{float:inline-end;color:var(--c-primary);font-weight:700;font-family:var(--font-en)}
.field select,.field input[type=number]{width:100%;padding:11px 13px;border:1.5px solid var(--c-line);
  border-radius:10px;font-family:inherit;font-size:15px;background:#fff;color:var(--c-ink)}
.field input[type=range]{width:100%;accent-color:var(--c-primary-2)}
.field .hint{font-size:12.5px;color:var(--c-muted);margin-top:5px}
.calc-results{display:grid;gap:22px}
.result-top{display:grid;grid-template-columns:1.2fr 1fr;gap:18px}
.fs-box{border-radius:var(--radius);padding:26px;color:#fff;text-align:center;box-shadow:var(--shadow)}
.fs-box .fs-num{font-size:64px;font-weight:800;line-height:1;font-family:var(--font-en)}
.fs-box .fs-lbl{opacity:.9;font-size:15px;margin-top:6px}
.fs-box .badge{display:inline-block;margin-top:14px;background:rgba(255,255,255,.22);padding:6px 16px;border-radius:999px;font-weight:700}
.fs-box .fs-desc{font-size:13.5px;opacity:.92;margin-top:10px}
.mini-stats{display:grid;gap:12px}
.mini{background:var(--c-card);border:1px solid var(--c-line);border-radius:12px;padding:14px 16px;box-shadow:var(--shadow);
  display:flex;justify-content:space-between;align-items:center}
.mini .k{color:var(--c-slate);font-size:14px}
.mini .v{font-weight:800;font-size:18px;font-family:var(--font-en)}
.chart-card{background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}
.chart-card h4{font-size:15.5px;margin-bottom:12px;color:var(--c-ink-2)}
.chart-card canvas{max-height:240px}
.charts-2{display:grid;grid-template-columns:1fr 1fr;gap:22px}

/* risk color helpers */
.bg-CRITICAL{background:linear-gradient(135deg,#991b1b,#7f1d1d)}
.bg-ALERT{background:linear-gradient(135deg,#f97316,#ef4444)}
.bg-WARNING{background:linear-gradient(135deg,#f59e0b,#d97706)}
.bg-STABLE{background:linear-gradient(135deg,#22c55e,#16a34a)}
.dot{width:11px;height:11px;border-radius:50%;display:inline-block}
.dot-CRITICAL{background:var(--r-critical)} .dot-ALERT{background:var(--r-alert)}
.dot-WARNING{background:var(--r-warning)} .dot-STABLE{background:var(--r-stable)}
.pill{padding:4px 12px;border-radius:999px;font-weight:700;font-size:13px;color:#fff;display:inline-block}
.pill-CRITICAL{background:var(--r-critical)} .pill-ALERT{background:var(--r-alert)}
.pill-WARNING{background:var(--r-warning)} .pill-STABLE{background:var(--r-stable)}

/* ---- zones ---- */
.zones-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:start}
#map{height:440px;border-radius:var(--radius);box-shadow:var(--shadow);border:1px solid var(--c-line);z-index:1}
.ztable{width:100%;border-collapse:collapse;background:var(--c-card);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.ztable th,.ztable td{padding:13px 14px;text-align:start;border-bottom:1px solid var(--c-line);font-size:14.5px}
.ztable th{background:#f1f5f9;font-weight:700;color:var(--c-ink-2);font-size:13px}
.ztable tbody tr{cursor:pointer;transition:.12s}
.ztable tbody tr:hover{background:rgba(6,182,212,.06)}
.ztable tbody tr.active{background:rgba(6,182,212,.12)}
.zone-detail{margin-top:28px;background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--radius);
  padding:22px;box-shadow:var(--shadow);display:none}
.zone-detail.show{display:block}
.zone-detail-charts{display:grid;grid-template-columns:1fr 1fr;gap:22px}

/* ---- team ---- */
.team-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.member{background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--radius);padding:24px;text-align:center;box-shadow:var(--shadow)}
.avatar{width:64px;height:64px;border-radius:50%;margin:0 auto 12px;display:grid;place-items:center;font-weight:800;font-size:22px;
  color:#fff;background:linear-gradient(135deg,var(--c-primary-2),var(--c-primary));font-family:var(--font-en)}
.member .nm{font-weight:700;font-size:16px}
.member .rl{color:var(--c-muted);font-size:13.5px;margin-top:3px}
.member.lead{border-color:var(--c-primary-2);box-shadow:0 14px 30px rgba(6,182,212,.2)}
.subhead{text-align:center;font-size:15px;font-weight:700;color:var(--c-primary);letter-spacing:.05em;margin:8px 0 22px}

/* ---- footer ---- */
.footer{background:#0b1220;color:#cbd5e1;padding:56px 0 26px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:34px;margin-bottom:30px}
.footer h4{color:#fff;font-size:16px;margin-bottom:14px}
.footer a{color:#94a3b8;display:block;padding:4px 0}
.footer a:hover{color:#67e8f9}
.footer .brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;color:#fff;font-family:var(--font-en);margin-bottom:12px}
.footer .disc{color:#64748b;font-size:13px;margin-top:8px}
.footer-bottom{border-top:1px solid #1e293b;padding-top:20px;text-align:center;color:#64748b;font-size:13.5px}

/* ---- loading ---- */
.spinner{width:34px;height:34px;border:3px solid var(--c-line);border-top-color:var(--c-primary-2);border-radius:50%;
  animation:spin 1s linear infinite;margin:30px auto}
@keyframes spin{to{transform:rotate(360deg)}}
.loading-text{text-align:center;color:var(--c-muted);padding:14px}

/* ---- responsive ---- */
@media(max-width:980px){
  .grid-3,.grid-4,.steps,.team-grid{grid-template-columns:repeat(2,1fr)}
  .about-grid,.calc-wrap,.zones-grid,.charts-2,.zone-detail-charts,.result-top{grid-template-columns:1fr}
  .calc-form{position:static}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:680px){
  section{padding:60px 0}
  .nav-links{position:fixed;inset:68px 0 auto 0;flex-direction:column;background:#fff;border-bottom:1px solid var(--c-line);
    padding:14px 20px;gap:4px;display:none;box-shadow:var(--shadow)}
  .nav-links.open{display:flex}
  .nav-links a{width:100%}
  .nav-toggle{display:block}
  .grid-3,.grid-4,.steps,.team-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .hero-stats{gap:24px}
}