/* Landing and sign-up page. Clean white pages, near-black type and buttons, a bright green accent, Inter Tight with Bungee
   display headings, rounded cards and soft green-to-teal waves. Bright green is decorative; green text uses a darker shade for contrast. */
:root {
  color-scheme: light;
  --ink: #0a0a0a; --ink-2: #111827; --ink-3: #1f2937; --text: #4a5568; --muted: #6b7280; --faint: #9ca3af;
  --green: #00bb20; --green-text: #007f17; --green-soft: #eefcf0; --green-line: #cdeed3;
  --gray-btn: #e9eaec; --gray-btn-2: #dcdee2; --rule: #e5e7eb; --soft: #f3f5f8; --card: #ffffff; --page: #ffffff;
  --red: #c4262e;
  --radius: 16px; --shadow: 0 1px 2px rgba(17,24,39,.05), 0 16px 40px rgba(17,24,39,.08);
  --sans: "Inter Tight", system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
  --display: "Bungee", "Inter Tight", system-ui, sans-serif;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body { margin: 0; background: var(--page); color: var(--ink); font: 17px/1.55 var(--sans); -webkit-font-smoothing: antialiased; }
a { color: var(--green-text); }
h1, h2, h3 { line-height: 1.12; margin: 0; color: var(--ink); }
.wrap { width: 100%; max-width: 1180px; margin: 0 auto; padding: 0 16px; }
.skip { position: absolute; left: -999px; top: 8px; background: #fff; padding: 8px 12px; z-index: 10; }
.skip:focus { left: 8px; }
:focus-visible { outline: 3px solid rgba(0,187,32,.45); outline-offset: 2px; }
section { scroll-margin-top: 76px; }

/* buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; height: 46px; padding: 0 28px; border-radius: 10px;
  font: 600 16px var(--sans); text-decoration: none; border: 1px solid transparent; cursor: pointer; transition: background .15s, transform .05s; }
.btn:active { transform: translateY(1px); }
.btn-dark { background: var(--ink-2); color: #fff; }
.btn-dark:hover { background: var(--ink-3); }
.btn-gray { background: var(--gray-btn); color: #374151; }
.btn-gray:hover { background: var(--gray-btn-2); }
.btn-green { background: var(--green-text); color: #fff; }
.btn-green:hover { background: #006b13; }
.btn-sm { height: 38px; padding: 0 18px; font-size: 15px; }
.btn-block { width: 100%; }
.btn[disabled] { opacity: .7; cursor: progress; }

/* header */
.top { position: sticky; top: 0; z-index: 5; background: rgba(255,255,255,.9); backdrop-filter: saturate(1.4) blur(10px); }
.top-in { display: flex; align-items: center; justify-content: space-between; height: 68px; gap: 16px; }
.brand { display: inline-flex; align-items: center; gap: 9px; color: var(--ink); text-decoration: none; font-weight: 700; font-size: 22px; letter-spacing: -.02em; }
.top-nav { display: flex; align-items: center; gap: 26px; }
.top-nav a:not(.btn) { color: #374151; text-decoration: none; font-weight: 500; font-size: 15px; }
.top-nav a:not(.btn):hover { color: var(--ink); }
@media (max-width: 640px) { .top-nav { gap: 14px; } .top-nav a:not(.btn):not(#nav-login) { display: none; } }

/* type */
.eyebrow { margin: 0 0 12px; color: var(--green-text); font-weight: 700; font-size: 13px; letter-spacing: .14em; text-transform: uppercase; }
.display { font: 400 clamp(30px, 4.4vw, 46px)/1.05 var(--display); letter-spacing: .01em; text-transform: uppercase; color: var(--ink-2); }
.section-lede { margin: 14px 0 0; color: var(--text); font-size: 18px; max-width: 60ch; }

/* hero */
.hero { padding: 14px 0 8px; }
.hero-card { position: relative; overflow: hidden; border-radius: 24px; background: linear-gradient(180deg, #fff 0%, #fbfdfb 55%, #f2fbf4 100%);
  box-shadow: 0 1px 2px rgba(17,24,39,.04), 0 10px 40px rgba(17,24,39,.06); border: 1px solid #eef0f2; min-height: 520px;
  display: grid; place-items: center; padding: 80px 20px 180px; text-align: center; }
.waves { position: absolute; left: 0; right: 0; bottom: 0; width: 100%; height: 62%; pointer-events: none; }
.hero-copy { position: relative; max-width: 820px; }
.hero h1 { font-size: clamp(36px, 5.6vw, 58px); font-weight: 600; letter-spacing: -.025em; color: var(--ink); }
.lede { margin: 20px auto 30px; font-size: 18px; color: var(--text); max-width: 60ch; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; }
.hero .cta, .cta.center { justify-content: center; }
.strip-title { margin: 30px 0 12px; text-align: center; color: var(--faint); font-weight: 600; font-size: 13px; letter-spacing: .08em; text-transform: uppercase; }
.strip { list-style: none; margin: 0 0 8px; padding: 0; display: flex; flex-wrap: wrap; justify-content: center; gap: 10px 14px; }
.strip li { padding: 8px 16px; border: 1px solid var(--rule); border-radius: 999px; color: #374151; font-weight: 600; font-size: 14px; background: #fff; }
@media (max-width: 600px) { .hero-card { padding: 56px 16px 150px; min-height: 0; } }

/* features: tabbed list */
.features { padding: 96px 0 72px; }
.ftabs { display: grid; grid-template-columns: 300px 1fr; gap: 48px; margin-top: 44px; align-items: start; }
@media (max-width: 880px) { .ftabs { grid-template-columns: 1fr; gap: 24px; } }
.ftab-list { display: grid; gap: 6px; border-left: 2px solid var(--rule); padding-left: 14px; }
.ftab-list button { display: flex; align-items: center; gap: 12px; text-align: left; font: 500 16px var(--sans); color: var(--faint); background: none;
  border: 0; padding: 8px 6px; cursor: pointer; border-radius: 10px; position: relative; }
.ftab-list button i { display: grid; place-items: center; width: 32px; height: 32px; border-radius: 8px; background: var(--soft); color: var(--faint); font-style: normal; font-size: 15px; }
.ftab-list button:hover { color: #374151; }
.ftab-list button[aria-selected="true"] { color: var(--ink); font-weight: 600; }
.ftab-list button[aria-selected="true"] i { background: var(--green-soft); color: var(--green-text); }
.ftab-list button[aria-selected="true"]::before { content: ""; position: absolute; left: -16px; top: 6px; bottom: 6px; width: 2px; background: var(--green); }
@media (max-width: 880px) { .ftab-list { grid-auto-flow: column; grid-auto-columns: max-content; overflow-x: auto; border-left: 0; padding: 0 0 6px; scrollbar-width: none; }
  .ftab-list::-webkit-scrollbar { display: none; }
  .ftab-list button[aria-selected="true"]::before { display: none; } .ftab-list button[aria-selected="true"] { background: var(--green-soft); } }
.ftab-panel { padding: 4px 0; }
.ftab-panel .tag { display: inline-flex; align-items: center; gap: 10px; margin: 0 0 14px; font-weight: 700; font-size: 13px; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-2); }
.ftab-panel .tag i { display: grid; place-items: center; width: 30px; height: 30px; border-radius: 8px; background: var(--green-soft); color: var(--green-text); font-style: normal; }
.ftab-panel h3 { font-size: clamp(24px, 3vw, 32px); font-weight: 600; letter-spacing: -.02em; }
.ftab-panel > p { color: var(--text); font-size: 18px; margin: 12px 0 20px; max-width: 58ch; }

/* check lists */
.checks { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.checks li { position: relative; padding-left: 34px; color: #1f2937; }
.checks li::before { content: ""; position: absolute; left: 0; top: 2px; width: 22px; height: 22px; border-radius: 50%; border: 2px solid var(--green);
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Cpath d='M5.5 10.5l3 3 6-7' stroke='%2300bb20' stroke-width='2.4' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/16px no-repeat; }
.checks.big li { font-size: 18px; }

/* split section with the preview */
.split { padding: 72px 0; }
.split-in { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.split .checks { margin-top: 26px; }
@media (max-width: 920px) { .split-in { grid-template-columns: 1fr; gap: 36px; } }
.preview { margin: 0; background: var(--card); border: 1px solid var(--rule); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; }
.pv-bar { display: flex; align-items: center; gap: 6px; padding: 12px 16px; background: var(--ink-2); color: #fff; }
.pv-dot { width: 9px; height: 9px; border-radius: 50%; background: rgba(255,255,255,.3); }
.pv-dot:first-child { background: var(--green); }
.pv-title { margin-left: 8px; font-weight: 600; font-size: 14px; }
.pv-body { display: grid; grid-template-columns: auto 1fr; gap: 18px; align-items: center; padding: 20px; }
@media (max-width: 480px) { .pv-body { grid-template-columns: 1fr; justify-items: center; } }
.pv-total-l { font: 400 9px var(--sans); fill: var(--muted); }
.pv-total { font: 700 15px var(--sans); fill: var(--ink); }
.pv-table { width: 100%; border-collapse: collapse; font-size: 14px; font-variant-numeric: tabular-nums; }
.pv-table th { text-align: right; font-weight: 600; color: var(--muted); font-size: 12px; padding: 0 6px 6px; border-bottom: 1px solid var(--rule); }
.pv-table th:first-child, .pv-table td:first-child { text-align: left; }
.pv-table td { text-align: right; padding: 8px 6px; border-bottom: 1px solid #f1f2f4; white-space: nowrap; }
.pv-table i { display: inline-block; width: 9px; height: 9px; border-radius: 3px; margin-right: 7px; }
.pv-table .ok { color: var(--green-text); font-weight: 700; }
.pv-table .bad { color: var(--red); font-weight: 700; }
.pv-foot { display: flex; justify-content: space-between; align-items: center; gap: 8px; padding: 12px 20px; background: var(--soft); border-top: 1px solid var(--rule); font-size: 14px; }
.pill { background: var(--green-soft); color: var(--green-text); font-weight: 700; padding: 3px 12px; border-radius: 999px; }
.muted { color: var(--muted); }

/* how it works */
.how { padding: 88px 0; background: var(--soft); }
.steps { list-style: none; padding: 0; margin: 40px 0 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
@media (max-width: 860px) { .steps { grid-template-columns: 1fr; } }
.steps li { background: var(--card); border: 1px solid var(--rule); border-radius: var(--radius); padding: 26px; }
.steps .n { display: grid; place-items: center; width: 40px; height: 40px; border-radius: 12px; background: var(--green-soft); color: var(--green-text);
  font: 400 20px var(--display); margin-bottom: 16px; }
.steps h3 { font-size: 20px; font-weight: 600; margin-bottom: 6px; }
.steps p { margin: 0; color: var(--text); font-size: 16px; }

/* sign-up */
.signup { padding: 96px 0; }
.signup-in { display: grid; grid-template-columns: 1fr minmax(320px, 460px); gap: 56px; align-items: start; }
@media (max-width: 880px) { .signup-in { grid-template-columns: 1fr; gap: 28px; } .signup { padding: 64px 0; } }
.signup-copy > p { color: var(--text); font-size: 18px; margin: 16px 0 22px; max-width: 52ch; }
.card { background: var(--card); border: 1px solid var(--rule); border-radius: 20px; box-shadow: var(--shadow); }
.form { padding: 30px; display: grid; gap: 16px; }
.form-title { font-size: 22px; font-weight: 600; letter-spacing: -.01em; }
.tabs { display: grid; grid-template-columns: 1fr 1fr; background: var(--soft); border-radius: 12px; padding: 4px; gap: 4px; }
.tabs button { font: 600 15px var(--sans); color: var(--muted); background: none; border: 0; border-radius: 9px; padding: 10px 8px; cursor: pointer; }
.tabs button[aria-selected="true"] { background: #fff; color: var(--ink); box-shadow: 0 1px 3px rgba(17,24,39,.12); }
.pw-wrap { position: relative; }
.pw-wrap input { padding-right: 64px; }
.pw-toggle { position: absolute; right: 6px; top: 50%; transform: translateY(-50%); font: 600 13px var(--sans); color: var(--green-text); background: none; border: 0; padding: 6px 8px; cursor: pointer; border-radius: 6px; }
.pw-toggle:hover { background: var(--soft); }
.hint-sm { margin: 0; color: var(--muted); font-size: 13px; }
.linkish { font: 600 14px var(--sans); color: var(--green-text); background: none; border: 0; padding: 0; cursor: pointer; justify-self: start; }
.linkish:hover { text-decoration: underline; }
.forgot-row { margin: 2px 0 0; }
.check-email { display: grid; gap: 12px; text-align: center; justify-items: center; padding: 8px 0; }
.check-email h3 { font-size: 22px; font-weight: 600; }
.check-email p { margin: 0; color: var(--text); }
.check-email .linkish { justify-self: center; }
.ce-icon { width: 56px; height: 56px; border-radius: 50%; background: var(--green-soft); color: var(--green-text); display: grid; place-items: center; font-size: 28px; }
.field { display: grid; gap: 6px; }
.field label { font-weight: 600; font-size: 15px; }
.opt { font-weight: 400; color: var(--muted); font-size: 13px; margin-left: 4px; }
.field input, .field select, .field textarea { width: 100%; font: 16px var(--sans); color: var(--ink); background: #fff; border: 1px solid #d1d5db; border-radius: 10px; padding: 11px 12px; }
.field textarea { resize: vertical; min-height: 84px; }
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--green); outline: 3px solid rgba(0,187,32,.18); outline-offset: 0; }
.field input[aria-invalid="true"] { border-color: var(--red); }
.err { margin: 0; color: var(--red); font-size: 14px; }
.check { display: flex; gap: 10px; align-items: flex-start; font-size: 15px; color: var(--text); cursor: pointer; }
.check input { width: 18px; height: 18px; margin-top: 2px; accent-color: var(--green-text); }
.form-status { margin: 0; min-height: 1.2em; font-size: 15px; }
.form-status.error { color: var(--red); }
.form-status.ok { color: var(--green-text); font-weight: 700; }
.fine { margin: 0; color: var(--muted); font-size: 13px; }
.fine a { display: block; margin-top: 6px; font-weight: 600; }
.hp { position: absolute; left: -9999px; }

/* ready to start */
.ready { padding: 8px 0 88px; }
.ready-card { text-align: center; padding: 64px 20px; border-radius: 20px; border: 1px solid var(--green-line);
  background: radial-gradient(600px 240px at 50% 0%, #e3f8e7 0%, rgba(227,248,231,0) 70%), var(--green-soft); }
.ready-card p { color: var(--text); margin: 16px auto 28px; max-width: 52ch; }

/* footer */
.foot { background: var(--ink-2); color: #cbd5e1; padding: 64px 0 28px; }
.foot-in { display: flex; justify-content: space-between; gap: 32px; flex-wrap: wrap; }
.brand-light { color: #fff; }
.foot-tag { margin: 18px 0 0; color: #fff; font-size: 22px; font-weight: 600; letter-spacing: -.01em; max-width: 22ch; line-height: 1.25; }
.foot-nav { display: grid; gap: 10px; align-content: start; }
.foot-nav a { color: #cbd5e1; text-decoration: none; font-size: 15px; }
.foot-nav a:hover { color: #fff; }
.foot-fine { margin-top: 44px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.12); }
.foot-fine p { margin: 0; font-size: 13px; color: #94a3b8; }
/* Chess theme: a faint 8x8 board in the hero card, fading out toward the bottom (the top layer washes it out) */
.hero-card { background:
  linear-gradient(180deg, rgba(255,255,255,0) 0%, rgba(251,253,251,.55) 45%, #f2fbf4 88%),
  repeating-conic-gradient(rgba(17,24,39,.05) 0 25%, transparent 0 50%) 0 0 / 56px 56px,
  linear-gradient(180deg, #fff 0%, #fbfdfb 55%, #f2fbf4 100%); }