/* ===== CSS VARIABLES (light/dark) ===== */
:root{
  --bg:#F6F7F8; --card:#FFFFFF; --ink:#111827; --muted:#6B7280; --border:#E5E7EB;
  --tint:#EFF8FF; --teal:#145A5A; --teal-2:#0E3F3F; --gold:#F4A340; --shadow:0 2px 10px rgba(0,0,0,.06);
}
:root[data-theme='dark'], @media(prefers-color-scheme:dark){
  --bg:#0b0f12; --card:#11161a; --ink:#E6E7E8; --muted:#9aa4af; --border:#1f2a33;
  --tint:#0f1720; --teal:#3ec5c5; --teal-2:#2da3a3; --gold:#f2b35c; --shadow:0 2px 12px rgba(0,0,0,.35);
}

/* ===== RESET / BASE ===== */
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;background:var(--bg);color:var(--ink);line-height:1.55;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:inherit}
.container{max-width:1200px;margin:0 auto;padding:0 16px}
.section{padding:56px 0}
.eyebrow{color:var(--teal);text-transform:uppercase;letter-spacing:.08em;font-size:.85rem;font-weight:800}
h1{font-size:clamp(2rem,4.5vw,3.25rem);line-height:1.15;margin:.35rem 0 0;font-weight:900}
h2{font-size:clamp(1.5rem,3.2vw,2.25rem);margin:.2rem 0 1rem;font-weight:900}
.lead{font-size:1.05rem;color:var(--muted)}

.card{background:var(--card);border:1px solid var(--border);border-radius:22px;box-shadow:var(--shadow);padding:16px}
.hero-box{background:var(--tint);border:1px solid var(--border);border-radius:24px;box-shadow:var(--shadow);padding:12px}
.kpi{font-weight:900;color:var(--teal);font-size:2rem}

.btn{display:inline-flex;align-items:center;justify-content:center;border-radius:12px;padding:10px 16px;font-weight:800;text-decoration:none;border:1px solid transparent}
.btn-primary{background:var(--teal);color:#fff}
.btn-primary:hover{background:var(--teal-2)}
.btn-secondary{background:transparent;color:var(--ink);border-color:var(--border)}
.btn-secondary:hover{border-color:var(--teal)}

input,textarea{width:100%;padding:10px 12px;border:1px solid var(--border);border-radius:12px;background:var(--card);color:var(--ink)}
label{font-weight:700;font-size:.9rem}

/* ===== HEADER / NAV ===== */
.header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.88);backdrop-filter:blur(8px);border-bottom:1px solid var(--border)}
:root[data-theme='dark'] .header{background:rgba(17,22,26,.75)}
.navbar{display:flex;align-items:center;justify-content:space-between;padding:10px 0}
.brand{display:flex;align-items:center;gap:10px}
.brand strong{font-weight:900;font-size:1rem}

/* Desktop links hidden by default, enabled at md+ */
.nav-links{display:none;gap:18px;align-items:center}
.nav-links a{font-weight:800;text-decoration:none}
.theme-toggle{display:inline-flex;gap:8px;align-items:center;border:1px solid var(--border);padding:8px 10px;border-radius:12px;background:var(--card)}

/* Burger visible on small screens only */
.burger{display:inline-flex;align-items:center;justify-content:center;height:40px;width:40px;border-radius:10px;border:1px solid var(--border);background:var(--card)}
.burger svg{width:20px;height:20px}

/* Mobile panel */
.mobile-panel{position:fixed;left:0;right:0;top:56px;background:var(--card);border-bottom:1px solid var(--border);padding:12px 16px;display:none}
.mobile-panel.open{display:block}
.mobile-panel a{display:block;padding:12px 0;border-bottom:1px solid var(--border);text-decoration:none;font-weight:800}

/* ===== GRIDS & BREAKPOINTS ===== */
.grid{display:grid;gap:16px}
.grid-2{grid-template-columns:1fr}
.grid-3{grid-template-columns:1fr}
@media(min-width:640px){ /* small tablets */ }
@media(min-width:768px){ /* tablets */ 
  .nav-links{display:flex}
  .burger{display:none}
  .grid-2{grid-template-columns:1fr 1fr}
  .grid-3{grid-template-columns:1fr 1fr 1fr}
}
@media(min-width:1024px){ /* desktop */ 
  .container{max-width:1200px}
}
@media(min-width:1280px){ /* large desktop */
  .container{max-width:1280px}
}

/* ===== FOOTER ===== */
footer{background:var(--card);border-top:1px solid var(--border);margin-top:48px}
.footer-grid{display:grid;gap:16px;grid-template-columns:1fr}
@media(min-width:768px){.footer-grid{grid-template-columns:2fr 1fr 1fr 1fr}}

/* ===== DEVICE/FEATURE QUERIES ===== */
/* Pointer coarse (touch) can adjust targets a bit bigger */
@media (pointer:coarse){
  .btn{padding:12px 18px}
  .nav-links a{padding:6px 0}
}

/* Respect users who prefer reduced motion */
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
}

/* Safe areas */
@supports(padding:max(0px)){
  .header{padding-left:max(16px, env(safe-area-inset-left));padding-right:max(16px, env(safe-area-inset-right))}
  .container{padding-left:max(16px, env(safe-area-inset-left));padding-right:max(16px, env(safe-area-inset-right))}
}