:root {
  --brand: #00458A; --brand-700: #003468; --brand-50: #EEF4FA; --brand-100: #D6E4F2;
  --ink: #1C2430; --ink-2: #4A5565; --ink-3: #7A8494; --line: #E3E8EF; --bg: #F5F7FA;
  --ok: #1E7B4E; --ok-50: #E8F5EE; --bad: #B42318; --bad-50: #FDECEA; --warn: #9A5B00; --warn-50: #FFF4E0;
  --r: 12px;
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body { font: 15px/1.55 "Segoe UI", system-ui, -apple-system, Roboto, Arial, sans-serif; color: var(--ink); background: var(--bg); -webkit-font-smoothing: antialiased; }
a { color: var(--brand); }
h1, h2, h3 { line-height: 1.25; margin: 0 0 .5em; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 20px; }
.narrow { max-width: 680px; margin: 0 auto; padding: 0 16px; }

.top { background: #fff; border-bottom: 1px solid var(--line); }
.top .wrap { display: flex; align-items: center; gap: 16px; height: 64px; }
.logo { font-weight: 700; font-size: 17px; color: var(--brand); text-decoration: none; display: flex; align-items: center; gap: 10px; }
.logo i { width: 30px; height: 30px; border-radius: 8px; background: var(--brand); display: grid; place-items: center; }
.logo i svg { width: 18px; height: 18px; fill: #fff; }
.top nav { margin-left: auto; display: flex; gap: 10px; align-items: center; }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; border: 1px solid var(--line); background: #fff; color: var(--ink); border-radius: 9px; padding: 10px 16px; font: inherit; font-weight: 600; cursor: pointer; text-decoration: none; }
.btn:hover { border-color: #C9D2DE; }
.btn.primary { background: var(--brand); border-color: var(--brand); color: #fff; }
.btn.primary:hover { background: var(--brand-700); }
.btn.big { padding: 13px 22px; font-size: 16px; }
.btn.block { width: 100%; }
.btn:disabled { opacity: .55; cursor: default; }

.hero { padding: 72px 0 56px; }
.hero h1 { font-size: clamp(30px, 4.4vw, 46px); letter-spacing: -.02em; max-width: 780px; }
.hero p.lead { font-size: 19px; color: var(--ink-2); max-width: 680px; margin: 0 0 28px; }
.hero .cta { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.hero .cta .note { color: var(--ink-3); font-size: 14px; }

.flow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin: 8px 0 64px; }
.flow > div { background: #fff; border: 1px solid var(--line); border-radius: var(--r); padding: 18px; }
.flow b { display: block; margin-bottom: 4px; }
.flow .n { width: 28px; height: 28px; border-radius: 50%; background: var(--brand-50); color: var(--brand); display: grid; place-items: center; font-weight: 700; margin-bottom: 10px; }
.flow p { margin: 0; color: var(--ink-2); font-size: 14px; }

.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; margin-bottom: 64px; }
.features h3 { font-size: 16px; }
.features p { margin: 0; color: var(--ink-2); font-size: 14.5px; }

.price { background: #fff; border: 1px solid var(--line); border-radius: 16px; padding: 28px; display: flex; gap: 28px; align-items: center; flex-wrap: wrap; margin-bottom: 64px; }
.price .amount { font-size: 30px; font-weight: 700; color: var(--brand); }
.price ul { margin: 0; padding-left: 18px; color: var(--ink-2); }

footer { border-top: 1px solid var(--line); padding: 22px 0 40px; color: var(--ink-3); font-size: 13.5px; }
footer .wrap { display: flex; gap: 18px; flex-wrap: wrap; }
footer a { color: var(--ink-3); }

/* auth */
.authbox { max-width: 420px; margin: 56px auto; background: #fff; border: 1px solid var(--line); border-radius: 16px; padding: 30px; box-shadow: 0 12px 40px rgba(16, 32, 64, .06); }
.authbox h1 { font-size: 22px; }
.authbox .sub { color: var(--ink-2); margin: -4px 0 20px; font-size: 14.5px; }
.authbox .alt { margin-top: 18px; font-size: 14px; color: var(--ink-2); text-align: center; }

.field { margin-bottom: 14px; }
.field label { display: block; font-weight: 600; font-size: 14px; margin-bottom: 5px; }
.field .hint { font-size: 12.5px; color: var(--ink-3); margin-top: 4px; }
input[type=text], input[type=email], input[type=password], select, textarea {
  width: 100%; font: inherit; color: var(--ink); background: #fff; border: 1px solid #CBD3DE; border-radius: 9px; padding: 10px 12px; outline: none; }
input:focus, select:focus, textarea:focus { border-color: var(--brand); box-shadow: 0 0 0 3px var(--brand-100); }
.msg { border-radius: 9px; padding: 10px 12px; font-size: 14px; margin-bottom: 14px; display: none; }
.msg.bad { display: block; background: var(--bad-50); color: var(--bad); }
.msg.ok { display: block; background: var(--ok-50); color: var(--ok); }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

/* survey */
.sv-head { background: #fff; border-bottom: 1px solid var(--line); padding: 22px 0 18px; }
.sv-head img { max-height: 64px; max-width: 260px; display: block; margin-bottom: 12px; }
.sv-head .school { color: var(--ink-3); font-size: 14px; }
.sv-head h1 { font-size: 24px; margin: 2px 0 0; }
.card { background: #fff; border: 1px solid var(--line); border-radius: var(--r); padding: 20px; margin: 16px 0; }
.card h2 { font-size: 16px; margin-bottom: 12px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0 14px; }
.books { display: flex; flex-direction: column; gap: 8px; }
.book { display: flex; align-items: center; gap: 12px; border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; cursor: pointer; transition: border-color .12s, background .12s; }
.book:hover { border-color: #C9D2DE; }
.book.on { border-color: var(--brand); background: var(--brand-50); }
.book input { width: 20px; height: 20px; accent-color: var(--brand); flex: none; margin: 0; }
.book .t { flex: 1; min-width: 0; }
.book .t b { display: block; }
.book .t span { color: var(--ink-3); font-size: 13px; }
.book .p { font-weight: 700; white-space: nowrap; }
.grp { font-size: 12.5px; font-weight: 700; letter-spacing: .04em; text-transform: uppercase; color: var(--ink-3); margin: 14px 0 2px; }
.sum { position: sticky; bottom: 0; background: #fff; border-top: 1px solid var(--line); box-shadow: 0 -6px 20px rgba(16, 32, 64, .06); padding: 12px 0; margin-top: 18px; }
.sum .narrow { display: flex; align-items: center; gap: 14px; }
.sum .tot { flex: 1; }
.sum .tot b { font-size: 20px; }
.check { display: flex; gap: 10px; align-items: flex-start; font-size: 14px; cursor: pointer; }
.check input { width: 18px; height: 18px; margin-top: 2px; accent-color: var(--brand); flex: none; }
.muted { color: var(--ink-3); }
.done { text-align: center; padding: 40px 20px; }
.done .ic { width: 64px; height: 64px; border-radius: 50%; background: var(--ok-50); display: grid; place-items: center; margin: 0 auto 16px; }
.done .ic svg { width: 34px; height: 34px; fill: var(--ok); }
.closed { text-align: center; padding: 48px 20px; color: var(--ink-2); }
.linkbtn { background: none; border: none; padding: 0; color: var(--brand); cursor: pointer; font: inherit; text-decoration: underline; }

/* admin */
table.t { width: 100%; border-collapse: collapse; background: #fff; font-size: 14px; }
table.t th, table.t td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--line); vertical-align: middle; }
table.t th { font-size: 12px; color: var(--ink-3); background: #FAFBFC; }
.badge { display: inline-block; padding: 2px 8px; border-radius: 99px; font-size: 12px; font-weight: 600; }
.badge.ok { background: var(--ok-50); color: var(--ok); }
.badge.bad { background: var(--bad-50); color: var(--bad); }
.badge.warn { background: var(--warn-50); color: var(--warn); }

@media (max-width: 820px) {
  .flow { grid-template-columns: 1fr 1fr; }
  .features { grid-template-columns: 1fr; }
  .grid2 { grid-template-columns: 1fr; }
  .hero { padding: 44px 0 36px; }
}
@media (max-width: 480px) { .flow { grid-template-columns: 1fr; } .authbox { margin: 20px 12px; padding: 22px; } }