/* TP-Link Vulnerability Disclosure Portal — UX prototype
   Yuhui / rr — 2026-08-10 */

:root {
  --green: #4caf1f;
  --green-dark: #3d8f18;
  --green-soft: #f0f9ea;
  --navy: #101820;
  --ink: #1c2430;
  --muted: #667085;
  --faint: #98a2b3;
  --border: #e4e7ec;
  --bg: #f7f8fa;
  --card: #ffffff;
  --amber-bg: #fff8ea;
  --amber-line: #f0c46a;
  --amber-ink: #7a5410;
  --blue-bg: #eef4ff;
  --blue-line: #a9c6f5;
  --blue-ink: #1c3f6e;
  --danger: #d1453d;
  --danger-bg: #fdf1f0;
  --r: 12px;
  --shadow: 0 1px 2px rgba(16,24,40,.05), 0 4px 16px rgba(16,24,40,.06);
  --maxw: 940px;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: var(--maxw);
  margin-left: auto;
  margin-right: auto;
  padding: 0 24px;
}

a { color: var(--green-dark); }

/* ---------- header ---------- */
.site-header {
  background: var(--navy);
  color: #fff;
  border-bottom: 3px solid var(--green);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 18px;
  padding-bottom: 18px;
}
.brand { display: flex; align-items: center; gap: 12px; font-weight: 650; letter-spacing: .2px; }
.brand-mark {
  width: 30px; height: 30px; border-radius: 7px;
  background: var(--green);
  display: grid; place-items: center;
  font-size: 15px; font-weight: 800; color: #fff;
}
.brand small { display: block; font-weight: 400; font-size: .74rem; color: #9fb0bf; letter-spacing: .3px; }
.nav { display: flex; gap: 22px; font-size: .88rem; }
.nav a { color: #cfd8de; text-decoration: none; }
.nav a:hover, .nav a.on { color: #fff; }

/* ---------- hero ---------- */
.hero {
  background: linear-gradient(160deg, #101820 0%, #1b2b34 100%);
  color: #fff;
  padding: 56px 0 60px;
  text-align: center;
}
.hero h1 { margin: 0 0 14px; font-size: 2.15rem; line-height: 1.25; font-weight: 700; }
.hero p { margin: 0 auto; max-width: 680px; color: #c3ced6; font-size: 1.02rem; }
.hero .cta-row { margin-top: 28px; display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 22px; border-radius: 8px;
  font-size: .95rem; font-weight: 600; text-decoration: none;
  border: 1px solid transparent; cursor: pointer;
  transition: .15s ease;
}
.btn-primary { background: var(--green); color: #fff; }
.btn-primary:hover { background: var(--green-dark); }
.btn-ghost { background: rgba(255,255,255,.08); color: #fff; border-color: rgba(255,255,255,.28); }
.btn-ghost:hover { background: rgba(255,255,255,.16); }
.btn-quiet { background: #fff; color: var(--ink); border-color: var(--border); }
.btn-quiet:hover { border-color: var(--faint); }
.btn:disabled { opacity: .45; cursor: not-allowed; }

/* ---------- main ---------- */
main { padding: 44px 0 64px; }
section.block { margin-bottom: 52px; }
h2.sec { font-size: 1.45rem; margin: 0 0 8px; font-weight: 680; }
p.sec-sub { margin: 0 0 24px; color: var(--muted); }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--r);
  box-shadow: var(--shadow);
  padding: 26px 28px;
}

/* ---------- banners ---------- */
.banner {
  border-radius: 10px; padding: 14px 18px; margin-bottom: 14px;
  font-size: .9rem; border: 1px solid transparent;
  display: flex; gap: 11px; align-items: flex-start; text-align: left;
}
.banner .ic { flex: none; font-size: 1rem; line-height: 1.4; }
.banner-warn { background: var(--amber-bg); border-color: var(--amber-line); color: var(--amber-ink); }
.banner-info { background: var(--blue-bg); border-color: var(--blue-line); color: var(--blue-ink); }

/* ---------- commitment stats ---------- */
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.stat {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--r);
  padding: 22px 20px; box-shadow: var(--shadow);
}
.stat .n { font-size: 1.9rem; font-weight: 700; color: var(--green-dark); line-height: 1.1; }
.stat .l { font-weight: 620; margin-top: 6px; }
.stat .d { color: var(--muted); font-size: .87rem; margin-top: 4px; }

/* ---------- process timeline ---------- */
.flow { display: grid; gap: 0; }
.step {
  display: grid; grid-template-columns: 44px 1fr; gap: 18px;
  padding-bottom: 26px; position: relative;
}
.step:last-child { padding-bottom: 0; }
.step:not(:last-child)::before {
  content: ""; position: absolute; left: 21px; top: 40px; bottom: 0;
  width: 2px; background: var(--border);
}
.step .dot {
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--green-soft); border: 2px solid var(--green);
  color: var(--green-dark); font-weight: 700;
  display: grid; place-items: center; z-index: 1;
}
.step h3 { margin: 8px 0 6px; font-size: 1.03rem; }
.step p { margin: 0 0 10px; color: var(--muted); font-size: .92rem; }
.chips { display: flex; flex-wrap: wrap; gap: 7px; }
.chip {
  font-size: .78rem; padding: 4px 10px; border-radius: 20px;
  background: #f2f4f7; color: #475467; border: 1px solid var(--border);
}

/* ---------- two-col list ---------- */
.rules { display: grid; grid-template-columns: 1fr 1fr; gap: 14px 26px; }
.rule { display: flex; gap: 10px; align-items: flex-start; font-size: .93rem; }
.rule .tick { color: var(--green); font-weight: 700; flex: none; }

/* ---------- form shell ---------- */
.form-wrap { max-width: 760px; margin: 0 auto; }

.progress { margin-bottom: 26px; }
.pbar { height: 6px; border-radius: 4px; background: #e9ecf1; overflow: hidden; }
.pbar i { display: block; height: 100%; background: var(--green); width: 0; transition: width .3s ease; }
.psteps { display: flex; justify-content: space-between; margin-top: 12px; gap: 4px; }
.pstep { flex: 1; text-align: center; font-size: .76rem; color: var(--faint); }
.pstep .num {
  width: 26px; height: 26px; border-radius: 50%; margin: 0 auto 5px;
  display: grid; place-items: center; font-weight: 650; font-size: .78rem;
  background: #eceff3; color: var(--faint); border: 1px solid var(--border);
}
.pstep.on .num { background: var(--green); color: #fff; border-color: var(--green); }
.pstep.on { color: var(--ink); font-weight: 600; }
.pstep.done .num { background: var(--green-soft); color: var(--green-dark); border-color: var(--green); }
.pstep.done { color: var(--muted); }

.step-head { margin-bottom: 6px; }
.step-head h2 { margin: 0 0 6px; font-size: 1.28rem; }
.step-head p { margin: 0 0 22px; color: var(--muted); font-size: .92rem; }

fieldset { border: 0; padding: 0; margin: 0 0 22px; }
legend {
  font-size: .78rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: .06em; color: var(--faint); padding: 0 0 10px;
}

label.f { display: block; margin-bottom: 18px; font-size: .9rem; font-weight: 600; }
label.f > .lbl { display: flex; align-items: baseline; gap: 7px; margin-bottom: 6px; }
.opt { font-weight: 400; font-size: .78rem; color: var(--faint); }
.req { color: var(--danger); font-weight: 700; }
label.f .hint { display: block; font-weight: 400; font-size: .8rem; color: var(--muted); margin-top: 6px; }

input[type=text], input[type=email], input[type=date], input[type=number], select, textarea {
  width: 100%; padding: 10px 12px; font: inherit; font-size: .93rem;
  border: 1px solid var(--border); border-radius: 8px; background: #fff;
  color: var(--ink); transition: .15s;
}
input:focus, select:focus, textarea:focus {
  outline: none; border-color: var(--green); box-shadow: 0 0 0 3px rgba(76,175,31,.14);
}
textarea { resize: vertical; min-height: 92px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0 18px; }

/* choice cards */
.choices { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin-bottom: 20px; }
.choice { position: relative; }
.choice input { position: absolute; opacity: 0; }
.choice span {
  display: block; padding: 16px 14px; border: 1.5px solid var(--border);
  border-radius: 10px; background: #fff; cursor: pointer; text-align: center;
  font-size: .9rem; font-weight: 600; transition: .15s;
}
.choice span em { display: block; font-style: normal; font-size: 1.4rem; margin-bottom: 6px; }
.choice input:checked + span { border-color: var(--green); background: var(--green-soft); color: var(--green-dark); }
.choice span:hover { border-color: var(--faint); }

/* upload */
.drop {
  border: 1.5px dashed var(--border); border-radius: 10px; padding: 28px 20px;
  text-align: center; background: #fcfcfd; cursor: pointer; transition: .15s;
}
.drop:hover { border-color: var(--green); background: var(--green-soft); }
.drop .big { font-size: 1.6rem; }
.drop .t { font-weight: 620; margin-top: 8px; }
.drop .s { color: var(--muted); font-size: .84rem; margin-top: 4px; }
.filelist { margin-top: 14px; display: grid; gap: 8px; }
.file {
  display: flex; align-items: center; gap: 11px; padding: 10px 13px;
  border: 1px solid var(--border); border-radius: 9px; background: #fff; font-size: .87rem;
}
.file.ok { border-color: #bfe3a8; background: #f6fcf2; }
.file.bad { border-color: #f0b9b6; background: var(--danger-bg); }
.file .nm { flex: 1; font-weight: 600; word-break: break-all; }
.file .msg { color: var(--muted); font-size: .8rem; }
.file.bad .msg { color: var(--danger); }
.file .x { cursor: pointer; color: var(--faint); font-weight: 700; }

/* review */
.review dl { margin: 0; display: grid; grid-template-columns: 190px 1fr; gap: 10px 18px; font-size: .9rem; }
.review dt { color: var(--muted); }
.review dd { margin: 0; font-weight: 600; word-break: break-word; }
.review .grp { border-top: 1px solid var(--border); padding-top: 18px; margin-top: 18px; }
.review .grp:first-of-type { border-top: 0; padding-top: 0; margin-top: 0; }
.review h4 { margin: 0 0 12px; font-size: .8rem; text-transform: uppercase; letter-spacing: .06em; color: var(--faint); }
.edit { font-size: .8rem; font-weight: 600; color: var(--green-dark); cursor: pointer; float: right; }

.check { display: flex; gap: 11px; align-items: flex-start; font-size: .89rem; padding: 15px; background: #f9fafb; border: 1px solid var(--border); border-radius: 9px; }
.check input { margin-top: 3px; flex: none; width: 16px; height: 16px; accent-color: var(--green); }

.actions { display: flex; justify-content: space-between; gap: 12px; margin-top: 28px; padding-top: 22px; border-top: 1px solid var(--border); }

.err { color: var(--danger); font-size: .82rem; margin-top: 6px; font-weight: 500; }
input.invalid, select.invalid, textarea.invalid { border-color: var(--danger); }

/* success */
.done { text-align: center; padding: 20px 10px; }
.done .ring {
  width: 66px; height: 66px; border-radius: 50%; margin: 0 auto 20px;
  background: var(--green-soft); border: 2px solid var(--green);
  display: grid; place-items: center; font-size: 1.9rem; color: var(--green-dark);
}
.ticket {
  display: inline-block; margin: 18px 0 6px; padding: 14px 30px;
  background: var(--navy); color: #fff; border-radius: 10px;
  font-family: ui-monospace, "SF Mono", Menlo, monospace; font-size: 1.45rem; letter-spacing: .06em;
}
.next { text-align: left; margin-top: 30px; }
.next .step { padding-bottom: 20px; }
.next .dot { width: 36px; height: 36px; font-size: .85rem; }
.next .step { grid-template-columns: 36px 1fr; }
.next .step:not(:last-child)::before { left: 17px; top: 34px; }

.site-footer {
  border-top: 1px solid var(--border); padding: 26px 0; margin-top: 20px;
  color: var(--faint); font-size: .83rem; text-align: center; background: #fff;
}

.note-proto {
  background: #fffbe8; border: 1px dashed var(--amber-line); color: var(--amber-ink);
  font-size: .8rem; padding: 9px 16px; text-align: center;
}

@media (max-width: 720px) {
  .stats, .rules, .grid2, .review dl { grid-template-columns: 1fr; }
  .review dl { gap: 2px 0; }
  .review dt { margin-top: 8px; }
  .hero h1 { font-size: 1.6rem; }
  .nav { display: none; }
  .pstep span.t { display: none; }
}