:root{
  --bg:#f6f9fb; --card:#ffffff; --ink:#0f1b24; --muted:#5b6b78;
  --line:#e4ecf1; --brand:#0891b2; --brand2:#22c1dc; --brand-ink:#ffffff;
  --accent:#0ea5a4; --good:#0a8f52; --amber:#a4620b;
  --shadow:0 6px 24px rgba(16,45,60,.08); --radius:14px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:"Inter",system-ui,Segoe UI,Roboto,Arial,sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.55;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
.wrap{max-width:1000px;margin:0 auto;padding:0 22px}

/* header */
.nav{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.92);
  backdrop-filter:saturate(150%) blur(8px);border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{font-weight:800;font-size:1.2rem;letter-spacing:-.02em;display:flex;align-items:center;gap:9px}
.brand .dot{width:28px;height:28px;border-radius:9px;background:linear-gradient(135deg,var(--brand),var(--brand2));
  display:inline-grid;place-items:center;color:#fff;font-size:1rem}
.nav nav{display:flex;align-items:center;gap:6px}
.nav nav a{padding:8px 14px;border-radius:10px;color:var(--muted);font-weight:600;font-size:.95rem;transition:.15s}
.nav nav a:hover{color:var(--ink);background:var(--bg)}

main.wrap{padding:34px 22px 50px;min-height:64vh}
h1{font-size:1.7rem;letter-spacing:-.02em;margin:0 0 6px}
h2.section{font-size:1.15rem;margin:30px 0 4px;letter-spacing:-.01em}
.sub{color:var(--muted);margin:0 0 22px}
.small{font-size:.85rem}
.muted{color:var(--muted)}

/* hero + features (landing) */
.hero{position:relative;overflow:hidden;border-radius:20px;padding:56px 44px;margin-bottom:30px;
  background:radial-gradient(120% 140% at 100% 0,#22c1dc 0,#0891b2 45%,#075e78 100%);color:#fff}
.hero::after{content:"";position:absolute;right:-60px;bottom:-80px;width:280px;height:280px;border-radius:50%;
  background:rgba(255,255,255,.12)}
.hero h1{margin:0 0 10px;font-size:2.2rem;letter-spacing:-.03em;line-height:1.12;max-width:18ch;color:#fff}
.hero .lead{opacity:.94;margin:0 0 22px;max-width:54ch;font-size:1.05rem}
.features{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px}
.feature{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}
.feature .fi{font-size:1.7rem;margin-bottom:8px}
.feature h3{margin:2px 0 6px;font-size:1.05rem}

/* buttons */
.cta,button.cta{display:inline-flex;align-items:center;gap:8px;background:#fff;color:var(--brand);
  border:0;padding:12px 22px;border-radius:12px;font-weight:700;font-size:1rem;cursor:pointer;
  box-shadow:0 4px 14px rgba(0,0,0,.10);transition:.15s}
.hero .cta:hover{transform:translateY(-1px)}
main form .cta,main .form .cta{background:var(--brand);color:#fff;width:100%;justify-content:center}
main .form .cta:hover{background:#0b7c99}
.btn-sm{display:inline-flex;align-items:center;gap:6px;background:var(--brand);color:#fff;padding:7px 13px;
  border-radius:9px;font-weight:600;font-size:.85rem;transition:.15s}
.btn-sm:hover{background:#0b7c99}
.btn-sm.ghost{background:transparent;color:var(--brand);border:1px solid var(--line)}
.btn-sm.ghost:hover{background:#eef7fa}
.dl{display:inline;margin:0}
.ilink{color:var(--brand);font-weight:700}

/* account header */
.acct-head{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:6px}
.plan-chip{background:#e6f6fb;color:var(--brand);font-weight:700;padding:8px 16px;border-radius:999px;font-size:.9rem;border:1px solid #c8ebf3}

/* tables */
.tbl{width:100%;border-collapse:separate;border-spacing:0;background:var(--card);
  border:1px solid var(--line);border-radius:14px;overflow:hidden;margin:14px 0;box-shadow:var(--shadow)}
.tbl th,.tbl td{padding:12px 16px;text-align:left;border-bottom:1px solid var(--line)}
.tbl th{background:#eef4f8;color:var(--muted);font-size:.78rem;text-transform:uppercase;letter-spacing:.04em}
.tbl tr:last-child td{border-bottom:0}
.tbl .total td{font-weight:800;background:#f6fbfd;font-size:1.05rem}
.pill{display:inline-block;padding:3px 10px;border-radius:999px;font-size:.75rem;font-weight:700}
.pill.paid{background:#e7f7ee;color:var(--good)}
.pill.admin{background:#fdeaea;color:#c0392b}

/* forms */
.form{display:flex;flex-direction:column;gap:14px;max-width:360px;background:var(--card);
  padding:24px;border-radius:16px;border:1px solid var(--line);box-shadow:var(--shadow)}
.form label{display:flex;flex-direction:column;gap:6px;font-size:.85rem;font-weight:600;color:var(--muted)}
input,select{padding:11px 12px;border:1px solid #d3dde4;border-radius:10px;font-size:1rem;background:#fff;color:var(--ink)}
input:focus,select:focus{outline:2px solid var(--brand);outline-offset:1px;border-color:var(--brand)}
.demo-creds{margin-top:18px;max-width:360px;background:#f0f7fa;border:1px dashed #bfe2ec;border-radius:12px;padding:14px 18px}
.demo-creds ul{margin:6px 0 0;padding-left:18px}
.demo-creds li{margin:3px 0}
.demo-creds code{background:#fff;padding:1px 6px;border-radius:6px;border:1px solid var(--line)}

/* invoice card */
.invoice{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:28px;box-shadow:var(--shadow);max-width:640px}
.inv-top{display:flex;justify-content:space-between;align-items:flex-start}
.inv-top .dot{color:var(--brand)}
.inv-ref{text-align:right}.inv-ref h2{margin:0 0 6px}
.invoice hr{border:0;border-top:1px solid var(--line);margin:18px 0}
.inv-parties{display:flex;justify-content:space-between;gap:20px;margin-bottom:6px}

/* flashes + flag + token */
.flash{padding:12px 16px;border-radius:12px;margin:14px 0;font-weight:600}
.flash.ok{background:#e7f7ee;color:var(--good)}
.flash.warn{background:#fff3e0;color:var(--amber);border:1px solid #ffe1b3}
.flag{display:flex;align-items:center;gap:10px;background:linear-gradient(135deg,#0a8f52,#0f6b46);
  color:#fff;padding:16px 20px;border-radius:14px;margin:18px 0;font-size:1.08rem;font-weight:600;
  box-shadow:0 6px 20px rgba(10,143,82,.28)}
.flag code{background:rgba(255,255,255,.18);padding:3px 10px;border-radius:7px;font-size:.98rem}
pre.token{background:#0e1b24;color:#7ee0f2;padding:16px 18px;border-radius:12px;overflow-x:auto;
  font-size:.85rem;white-space:pre-wrap;word-break:break-all;border:1px solid #17303c}

/* footer */
.foot{background:#0c1a22;color:#8aa2b0;padding:26px 0;margin-top:40px;font-size:.9rem}
.foot .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}

@media(max-width:640px){
  .hero{padding:40px 24px}.hero h1{font-size:1.7rem}
  .inv-parties{flex-direction:column;gap:10px}
}