@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

*{ box-sizing:border-box; margin:0; padding:0; }

:root{
  --ink:#1B2130;
  --ink-soft:#5B6472;
  --line:#E4E7EC;
  --accent:#2F6FED;
  --accent-dark:#1E4FBB;
  --accent-soft:#EBF1FE;
  --bg-alt:#F7F8FA;
}

body{
  font-family:'Inter', -apple-system, sans-serif;
  color:var(--ink);
  line-height:1.6;
  min-height:100vh;
  display:flex;
  flex-direction:column;
}

.container{ max-width:1080px; margin:0 auto; padding:0 24px; }

a{ color:inherit; text-decoration:none; }

/* header */
header{ border-bottom:1px solid var(--line); position:sticky; top:0; background:#fff; z-index:10; }
.nav{
  display:flex; align-items:center; justify-content:space-between; height:68px;
}
.logo{ font-weight:700; font-size:19px; letter-spacing:-0.01em; }
.nav-links{ display:flex; align-items:center; gap:28px; font-size:14.5px; }
.nav-links a{ color:var(--ink-soft); transition:color .15s ease; }
.nav-links a:hover{ color:var(--ink); }
.signin-link{ color:var(--ink-soft); font-size:14px; }
.signin-link:hover{ color:var(--ink); }

.btn{
  display:inline-block; padding:10px 20px; border-radius:7px;
  font-weight:600; font-size:14px; border:1px solid transparent;
  transition:background .15s ease, box-shadow .15s ease, transform .1s ease;
}
.btn-primary{
  background:var(--accent); color:#ffffff; font-weight:700;
  box-shadow:0 2px 8px rgba(47,111,237,0.35);
}
.btn-primary:hover{ background:var(--accent-dark); transform:translateY(-1px); box-shadow:0 4px 12px rgba(47,111,237,0.4); }

.btn-lg{ padding:15px 34px; font-size:16px; border-radius:9px; }

/* hero */
.hero{ padding:80px 0 64px; text-align:center; background:var(--bg-alt); }
.hero .eyebrow{
  font-size:13px; font-weight:600; color:var(--accent);
  text-transform:uppercase; letter-spacing:0.08em; margin-bottom:14px;
}
.hero h1{ font-size:clamp(32px, 4.4vw, 48px); font-weight:700; letter-spacing:-0.01em; margin-bottom:14px; }
.hero p{ color:var(--ink-soft); font-size:17.5px; max-width:520px; margin:0 auto; }

/* features */
.features{ padding:64px 0 72px; }
.features .section-head{ text-align:center; margin-bottom:40px; }
.features h2{ font-size:26px; margin-bottom:8px; }
.features .section-head p{ color:var(--ink-soft); font-size:15.5px; }

.feature-grid{
  display:grid; grid-template-columns:repeat(5, 1fr); gap:18px;
}
.feature-card{
  border:1px solid var(--line); border-radius:12px; padding:28px 18px;
  text-align:left; background:#fff;
  transition:box-shadow .15s ease, border-color .15s ease;
}
.feature-card:hover{ box-shadow:0 4px 16px rgba(0,0,0,0.06); border-color:#D8DDE5; }
.feature-card .icon{
  width:34px; height:34px; border-radius:8px; background:var(--accent-soft);
  color:var(--accent); font-weight:700; font-size:14px;
  display:flex; align-items:center; justify-content:center; margin-bottom:14px;
}
.feature-card h3{ font-size:15.5px; font-weight:600; margin-bottom:6px; }
.feature-card p{ font-size:13.5px; color:var(--ink-soft); }

/* footer */
footer{ border-top:1px solid var(--line); padding:24px 0; text-align:center; margin-top:auto; }
footer p{ font-size:13px; color:var(--ink-soft); }

/* auth (sign-in) */
.auth-wrap{
  flex:1 1 auto;
  display:flex; align-items:center; justify-content:center;
  padding:64px 24px;
  background:var(--bg-alt);
}
.auth-card{
  width:100%; max-width:400px; background:#fff;
  border:1px solid var(--line); border-radius:16px;
  padding:44px 40px; box-shadow:0 8px 32px rgba(20,24,32,0.08);
}
.auth-card h1{ font-size:25px; font-weight:700; margin-bottom:6px; text-align:center; letter-spacing:-0.01em; }
.auth-card .auth-sub{ font-size:14.5px; color:var(--ink-soft); text-align:center; margin-bottom:30px; }
.auth-field{ margin-bottom:20px; }
.auth-field label{ display:block; font-size:13.5px; font-weight:600; margin-bottom:7px; }
.auth-field input{
  width:100%; border:1px solid var(--line); border-radius:8px;
  padding:12px 14px; font-size:14.5px; font-family:'Inter', sans-serif; color:var(--ink);
}
.auth-field input:focus{ outline:none; border-color:var(--accent); box-shadow:0 0 0 3px var(--accent-soft); }
.auth-card .btn-primary{ width:100%; text-align:center; padding:13px 20px; margin-top:8px; }
.auth-foot{ text-align:center; font-size:13.5px; color:var(--ink-soft); margin-top:24px; }
.auth-foot a{ color:var(--accent); font-weight:600; }
.auth-foot a:hover{ text-decoration:underline; }

@media (max-width: 900px){
  .feature-grid{ grid-template-columns:repeat(2, 1fr); }
}
@media (max-width: 560px){
  .nav-links{ gap:12px; font-size:12.5px; }
  .feature-grid{ grid-template-columns:1fr; }
  .auth-card{ padding:32px 24px; }
}