:root {
  --bg: #f6f8fc;
  --panel: #ffffff;
  --panel-2: #f0f3f9;
  --border: #e3e8f0;
  --text: #0f172a;
  --muted: #64748b;
  --accent: #2563eb;
  --accent-d: #1d4ed8;
  --ok: #16a34a;
  --warn: #d97706;
  --bad: #dc2626;
  --shadow: 0 10px 40px rgba(15,23,42,.08);
  --shadow-sm: 0 2px 8px rgba(15,23,42,.06);
}
* { box-sizing: border-box; }
html, body {
  margin: 0; padding: 0; background: var(--bg); color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 15px; line-height: 1.5;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.logo {
  width: 38px; height: 38px; border-radius: 10px;
  background: linear-gradient(135deg, #4f8cff, #1d4ed8);
  display: grid; place-items: center; font-weight: 800; color: white; font-size: 20px;
  box-shadow: 0 6px 16px rgba(37,99,235,.35);
}
.logo-img { width: 40px; height: 40px; display: block; flex-shrink: 0; }
.auth-card .logo-img { width: 38px; height: 38px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border: 1px solid var(--border); background: var(--panel); color: var(--text);
  padding: 10px 18px; border-radius: 10px; font-size: 14px; font-weight: 600;
  cursor: pointer; transition: all .15s ease; font-family: inherit;
}
.btn:hover { background: var(--panel-2); text-decoration: none; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: white; }
.btn.primary:hover { background: var(--accent-d); }
.btn.ghost { background: transparent; }
.btn.block { width: 100%; }
.btn.lg { padding: 13px 24px; font-size: 15px; }

/* ---------- Marketing nav + hero ---------- */
.nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 32px; max-width: 1100px; margin: 0 auto;
}
.nav .brand { display: flex; align-items: center; gap: 11px; font-weight: 700; font-size: 18px; }
.nav .links { display: flex; align-items: center; gap: 10px; }

.hero {
  max-width: 880px; margin: 0 auto; padding: 70px 24px 40px; text-align: center;
}
.hero h1 {
  font-size: 46px; line-height: 1.1; letter-spacing: -.03em; margin: 0 0 18px; font-weight: 800;
}
.hero h1 .grad {
  background: linear-gradient(120deg, #2563eb, #4f8cff);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero p { font-size: 18px; color: var(--muted); margin: 0 auto 30px; max-width: 560px; }
.hero .cta { display: flex; gap: 12px; justify-content: center; }

.features {
  max-width: 1000px; margin: 50px auto; padding: 0 24px;
  display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 18px;
}
.feature {
  background: var(--panel); border: 1px solid var(--border); border-radius: 14px;
  padding: 22px; box-shadow: var(--shadow-sm);
}
.feature-head { display: flex; align-items: center; gap: 11px; margin-bottom: 9px; }
.feature .ico { font-size: 24px; line-height: 1; flex-shrink: 0; }
.feature h3 { margin: 0; font-size: 16px; }
.feature p { margin: 0; color: var(--muted); font-size: 14px; }

.pricing {
  max-width: 720px; margin: 40px auto 80px; padding: 0 24px;
  display: grid; grid-template-columns: 1fr 1fr; gap: 18px;
}
.plan {
  background: var(--panel); border: 1px solid var(--border); border-radius: 16px;
  padding: 28px; box-shadow: var(--shadow-sm);
}
.plan.pro { border-color: var(--accent); box-shadow: 0 12px 36px rgba(37,99,235,.16); }
.plan h3 { margin: 0 0 4px; font-size: 18px; }
.plan .price { font-size: 34px; font-weight: 800; margin: 8px 0; }
.plan .price small { font-size: 14px; color: var(--muted); font-weight: 500; }
.plan ul { list-style: none; padding: 0; margin: 16px 0; }
.plan li { padding: 6px 0; color: var(--muted); font-size: 14px; }
.plan li::before { content: "✓ "; color: var(--ok); font-weight: 700; }

.footer { text-align: center; color: var(--muted); font-size: 13px; padding: 30px; }

/* ---------- Auth card ---------- */
.auth-wrap { min-height: 100vh; display: grid; place-items: center; padding: 24px; }
.auth-card {
  background: var(--panel); border: 1px solid var(--border); border-radius: 16px;
  padding: 36px; width: 420px; max-width: 100%; box-shadow: var(--shadow);
}
.auth-card .brand {
  display: flex; align-items: center; gap: 11px; justify-content: center;
  font-weight: 700; font-size: 19px; margin-bottom: 6px;
}
.auth-card h1 { font-size: 22px; text-align: center; margin: 18px 0 4px; }
.auth-card .sub { text-align: center; color: var(--muted); font-size: 14px; margin: 0 0 24px; }
.field { margin-bottom: 16px; }
.field label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; }
.field input {
  width: 100%; padding: 11px 13px; border: 1px solid var(--border); border-radius: 10px;
  font-size: 15px; font-family: inherit; background: var(--panel-2); color: var(--text);
}
.field input:focus { outline: none; border-color: var(--accent); background: var(--panel); }
.auth-foot { text-align: center; margin-top: 20px; font-size: 14px; color: var(--muted); }
.error-msg {
  background: rgba(220,38,38,.08); border: 1px solid rgba(220,38,38,.25); color: var(--bad);
  border-radius: 10px; padding: 10px 13px; font-size: 13.5px; margin-bottom: 16px; display: none;
}
.error-msg.show { display: block; }