/* ---------- 1. Design tokens ---------- */
:root {
  --bg-primary: #050f0a;
  --bg-secondary: #0a1a10;
  --bg-card: #0d2018;
  --bg-card-hover: #123023;

  --green-primary: #00e676;
  --green-secondary: #00c853;
  --green-dim: #1a4d35;
  --green-glow: rgba(0, 230, 118, 0.12);

  --text-primary: #e8f5e9;
  --text-secondary: #81c784;
  --text-muted: #4caf50;

  --btn-text: #04140b;
  --header-bg: rgba(5, 15, 10, 0.88);

  --border: rgba(0, 230, 118, 0.18);
  --shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
  --shadow-sm: 0 2px 12px rgba(0, 0, 0, 0.35);

  --white: #ffffff;
  --danger: #ff5252;
  --star: #ffc107;

  --radius: 20px;
  --radius-sm: 12px;
  --radius-lg: 28px;
  --radius-pill: 999px;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --space-9: 96px;

  --container-w: 1200px;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: 0.15s ease;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

[data-theme="light"] {
  --bg-primary: #f5faf7;
  --bg-secondary: #eaf4ee;
  --bg-card: #ffffff;
  --bg-card-hover: #f2f9f4;

  --green-primary: #00a152;
  --green-secondary: #008f47;
  --green-dim: #d7ecdf;
  --green-glow: rgba(0, 200, 83, 0.10);

  --text-primary: #0d2018;
  --text-secondary: #1a4d35;
  --text-muted: #2e7d52;

  --btn-text: #ffffff;
  --header-bg: rgba(245, 250, 247, 0.9);

  --border: rgba(0, 180, 90, 0.2);
  --shadow: 0 4px 30px rgba(13, 32, 24, 0.08);
  --shadow-sm: 0 2px 8px rgba(13, 32, 24, 0.06);
}

/* ---------- 2. Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg-primary); color: var(--text-primary);
  font-family: var(--font-sans); font-size: 16px; line-height: 1.65;
  transition: background var(--transition), color var(--transition);
}
img, svg, canvas { max-width: 100%; }
a { color: var(--green-primary); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4 { margin: 0 0 var(--space-3); line-height: 1.2; font-weight: 800; letter-spacing: -0.02em; }
p { margin: 0 0 var(--space-4); }
:focus-visible { outline: 2px solid var(--green-primary); outline-offset: 2px; }
.wrap { width: 100%; max-width: var(--container-w); margin: 0 auto; padding: 0 var(--space-5); }
.skip { position: absolute; left: -999px; top: 0; z-index: 200; }
.skip:focus { left: 8px; top: 8px; background: var(--green-primary); color: var(--btn-text); padding: 8px 14px; border-radius: var(--radius-sm); }
section[id] { scroll-margin-top: 84px; }

/* ---------- 3. Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100; background: var(--header-bg);
  -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.h-in { display: flex; align-items: center; justify-content: space-between; gap: var(--space-4); min-height: 68px; }
.logo { display: inline-flex; align-items: center; gap: 8px; font-size: 1.2rem; font-weight: 800; color: var(--text-primary); letter-spacing: -0.02em; }
.logo:hover { text-decoration: none; }
.logo em { font-style: normal; color: var(--green-primary); }
.nav { display: flex; gap: var(--space-5); }
.nav a { color: var(--text-secondary); font-weight: 600; font-size: .95rem; padding: 6px 0; }
.nav a:hover { color: var(--green-primary); text-decoration: none; }
.h-actions { display: flex; gap: var(--space-2); align-items: center; }
.icon-btn {
  width: 42px; height: 42px; display: grid; place-items: center; cursor: pointer;
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-pill);
  color: var(--text-primary); font-size: 1.05rem; transition: var(--transition);
}
.icon-btn:hover { background: var(--bg-card-hover); border-color: var(--green-primary); }
.ico-moon { display: none; }
[data-theme="light"] .ico-sun { display: none; }
[data-theme="light"] .ico-moon { display: inline; }
.burger { display: none; flex-direction: column; gap: 4px; padding: 0; }
.burger span { display: block; width: 18px; height: 2px; background: var(--text-primary); border-radius: 2px; transition: var(--transition); }
.burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ---------- 4. Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 22px; border: 1px solid transparent; border-radius: var(--radius-pill);
  background: var(--green-primary); color: var(--btn-text); font: inherit; font-weight: 700;
  cursor: pointer; transition: var(--transition);
}
.btn:hover { background: var(--green-secondary); transform: translateY(-1px); text-decoration: none; }
.btn:disabled { opacity: .6; cursor: wait; transform: none; }
.btn.ghost { background: transparent; color: var(--text-primary); border-color: var(--border); }
.btn.ghost:hover { background: var(--bg-card-hover); border-color: var(--green-primary); }
.btn.sm { padding: 8px 16px; font-size: .85rem; }

/* ---------- 5. Hero ---------- */
.hero {
  text-align: center; padding: var(--space-8) 0 var(--space-6);
  background: radial-gradient(ellipse 70% 60% at 50% 0%, var(--green-glow), transparent 70%);
}
.hero h1 { font-size: clamp(2rem, 5.4vw, 3.6rem); font-weight: 800; max-width: 960px; margin: 0 auto var(--space-5); }
.hero h1 .g { color: var(--green-primary); }
.pill {
  display: inline-block; margin-bottom: var(--space-5); padding: 9px 22px; border: 1px solid var(--border);
  border-radius: var(--radius-pill); background: var(--green-glow); color: var(--green-primary); font-weight: 700; font-size: .92rem;
}
.hero-cta { display: flex; flex-wrap: wrap; justify-content: center; gap: var(--space-3); margin-bottom: var(--space-6); }
.btn.lg { padding: 16px 36px; font-size: 1.05rem; }
.hero-cta .btn:not(.ghost) { box-shadow: 0 8px 26px rgba(0, 200, 83, .3); }
.hero-cta .btn.ghost { color: var(--green-primary); }
.hero p { max-width: 760px; margin: 0 auto var(--space-5); color: var(--text-secondary); font-size: 1.1rem; }
.badges { display: flex; flex-wrap: wrap; justify-content: center; gap: var(--space-2); }
.badges span {
  padding: 9px 20px; border: 1px solid var(--border); border-radius: var(--radius-pill);
  background: var(--bg-card); font-size: .92rem; font-weight: 600; color: var(--text-secondary);
}

/* ---------- 6. Tool ---------- */
.tool-sec { padding: var(--space-5) 0 var(--space-7); }
.tool {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: var(--space-6); box-shadow: var(--shadow);
}
.tool-head { display: flex; justify-content: space-between; align-items: center; gap: var(--space-3); margin-bottom: var(--space-5); }
.tool-head h2 { margin: 0; font-size: 1.5rem; }
.blk { border: 0; padding: 0; margin: 0 0 var(--space-6); min-width: 0; }
.blk > legend { padding: 0 0 var(--space-3); margin-bottom: var(--space-4); width: 100%; border-bottom: 1px solid var(--border); font-size: 1.1rem; font-weight: 800; }
.blk > legend small { display: block; font-weight: 400; font-size: .85rem; color: var(--text-secondary); margin-top: 2px; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: var(--space-4); }
.grid.two { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.field > label, .cat-top label { display: block; font-weight: 600; font-size: .9rem; color: var(--text-primary); margin-bottom: 6px; }
.inp {
  display: flex; align-items: center; background: var(--bg-secondary); border: 1px solid var(--border);
  border-radius: var(--radius-sm); transition: var(--transition-fast);
}
.inp:focus-within { border-color: var(--green-primary); box-shadow: 0 0 0 3px var(--green-glow); }
.inp .pre, .inp .suf { color: var(--text-muted); font-weight: 700; padding-left: 14px; }
.inp .suf { padding: 0 14px 0 0; }
.inp input, .inp select {
  flex: 1; min-width: 0; width: 100%; background: transparent; border: 0; outline: 0;
  color: var(--text-primary); font: inherit; padding: 12px 14px;
}
.inp .pre + input { padding-left: 6px; }
.inp select option { background: var(--bg-card); color: var(--text-primary); }
.inp input::-webkit-outer-spin-button, .inp input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.inp input[type=number] { -moz-appearance: textfield; appearance: textfield; }
.hint { display: block; margin-top: 4px; font-size: .78rem; color: var(--text-secondary); min-height: 1.2em; }
.cdesc { display: block; font-size: .78rem; color: var(--text-muted); margin: -4px 0 6px; }

.chips { display: flex; flex-wrap: wrap; gap: var(--space-2); }
.chip { position: relative; }
.chip input { position: absolute; opacity: 0; inset: 0; cursor: pointer; }
.chip span {
  display: inline-block; padding: 10px 18px; border: 1px solid var(--border); border-radius: var(--radius-pill);
  background: var(--bg-secondary); font-weight: 600; font-size: .92rem; transition: var(--transition-fast);
}
.chip input:checked + span { background: var(--green-primary); color: var(--btn-text); border-color: var(--green-primary); }
.chip input:focus-visible + span { outline: 2px solid var(--green-primary); outline-offset: 2px; }

.cat-group { margin-bottom: var(--space-5); }
.cat-group h3 { font-size: .95rem; color: var(--text-secondary); font-weight: 700; margin-bottom: var(--space-3); }
.cat-top { display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.cat-top label { margin-bottom: 4px; }
.pg-toggle {
  font: inherit; font-size: .72rem; font-weight: 700; padding: 2px 10px; cursor: pointer;
  border: 1px solid var(--border); border-radius: var(--radius-pill);
  background: var(--bg-secondary); color: var(--text-secondary);
}
.pg-toggle[data-mode="guest"] { background: var(--green-primary); color: var(--btn-text); border-color: var(--green-primary); }
.helper { margin-top: 6px; font-size: .85rem; }
.helper summary { cursor: pointer; color: var(--green-primary); font-weight: 600; }
.helper .box { margin-top: 8px; padding: var(--space-3); border: 1px dashed var(--border); border-radius: var(--radius-sm); }
.helper .grid { grid-template-columns: repeat(2, 1fr); gap: var(--space-2); margin-bottom: var(--space-2); }
.helper label { font-size: .75rem; margin-bottom: 2px; display: block; color: var(--text-secondary); }
.helper .inp input { padding: 8px 10px; }
.tool-btns { display: flex; flex-wrap: wrap; gap: var(--space-3); }

/* ---------- 7. Result card ---------- */
.res-sec { padding: 0 0 var(--space-7); }
.sec-title { text-align: center; font-size: clamp(1.6rem, 3.6vw, 2.3rem); }
.sec-sub { text-align: center; color: var(--text-secondary); max-width: 680px; margin: 0 auto var(--space-6); }
.result-card {
  container-type: inline-size; background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow);
}
.rc { padding: var(--space-6); display: grid; gap: var(--space-5); }
.rc-brand { font-size: 1.25rem; font-weight: 800; }
.rc-sub { margin: 2px 0 0; color: var(--text-secondary); font-size: .92rem; }
.status { padding: 20px 24px; border-radius: var(--radius); background: var(--green-glow); border: 1px solid var(--border); }
.status .lbl { font-size: .9rem; font-weight: 600; color: var(--text-secondary); }
.status .big { font-size: clamp(1.7rem, 5vw, 2.5rem); font-weight: 800; color: var(--green-primary); line-height: 1.15; }
.status.bad { background: rgba(255, 82, 82, .1); border-color: rgba(255, 82, 82, .45); }
.status.bad .big { color: var(--danger); }
.prog { height: 12px; margin-top: 14px; border-radius: var(--radius-pill); background: var(--green-dim); overflow: hidden; }
.prog i { display: block; height: 100%; border-radius: var(--radius-pill); background: var(--green-primary); }
.status.bad .prog i { background: var(--danger); }
.status .sm { margin: 8px 0 0; font-size: .85rem; color: var(--text-secondary); }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-3); }
.stats.three { grid-template-columns: repeat(3, 1fr); }
.stat { padding: 14px 16px; background: var(--bg-secondary); border: 1px solid var(--border); border-radius: var(--radius-sm); }
.stat span { display: block; font-size: .78rem; color: var(--text-secondary); font-weight: 600; }
.stat b { display: block; font-size: 1.25rem; margin-top: 2px; }
.stat b.bad { color: var(--danger); }
.stat b.ok { color: var(--green-primary); }
.rc h4 { font-size: 1rem; margin-bottom: var(--space-2); }
.break { margin: 0; font-size: .85rem; color: var(--text-secondary); }
.charts { display: grid; grid-template-columns: 200px 1fr; gap: var(--space-5); align-items: center; }
.charts canvas { width: 200px; height: 200px; }
.legend { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; font-size: .9rem; }
.legend li { display: flex; align-items: center; gap: 8px; }
.legend i { width: 12px; height: 12px; border-radius: 4px; flex: none; }
.legend span { flex: 1; }
.legend b { white-space: nowrap; }
.legend em { font-style: normal; color: var(--text-secondary); width: 42px; text-align: right; }
.brow { display: grid; grid-template-columns: 150px 1fr 96px; gap: 10px; align-items: center; font-size: .88rem; padding: 5px 0; }
.brow b { text-align: right; font-weight: 700; }
.bars { display: grid; gap: 4px; }
.bar { height: 9px; background: var(--green-dim); border-radius: var(--radius-pill); overflow: hidden; }
.bar i { display: block; height: 100%; border-radius: var(--radius-pill); background: var(--green-primary); }
.bar.alt i { background: var(--star); }
.key { display: flex; gap: var(--space-4); font-size: .8rem; color: var(--text-secondary); margin-bottom: 4px; }
.key i { display: inline-block; width: 10px; height: 10px; border-radius: 3px; margin-right: 6px; background: var(--green-primary); }
.key i.alt { background: var(--star); }
.tips { margin: 0; padding: 0; list-style: none; display: grid; gap: var(--space-2); }
.tips li { padding: 12px 16px; background: var(--bg-secondary); border-left: 3px solid var(--green-primary); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; font-size: .92rem; }
.empty { padding: var(--space-6) var(--space-4); text-align: center; color: var(--text-secondary); }
.empty strong { display: block; font-size: 1.15rem; color: var(--text-primary); margin-bottom: 4px; }
.rc-foot {
  padding: var(--space-4) var(--space-6); border-top: 1px solid var(--border); background: var(--bg-secondary);
  text-align: center; font-size: .86rem; color: var(--text-secondary);
}
.rc-foot a { font-weight: 700; }
@container (max-width: 600px) {
  .rc { padding: var(--space-4); }
  .stats, .stats.three { grid-template-columns: repeat(2, 1fr); }
  .charts { grid-template-columns: 1fr; justify-items: center; }
  .charts .legend { width: 100%; }
  .brow { grid-template-columns: 1fr 90px; }
  .brow .bars { grid-column: 1 / -1; order: 3; }
}
.cap-stage { position: fixed; left: -10000px; top: 0; width: 800px; }
.cap-stage .result-card { width: 800px; border-radius: 0; box-shadow: none; border: 0; }

/* ---------- 8. Share panel ---------- */
.share { margin-top: var(--space-5); padding: var(--space-5); text-align: center; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); }
.share h3 { font-size: 1.15rem; }
.share p { color: var(--text-secondary); font-size: .9rem; }
.share .row { display: flex; flex-wrap: wrap; justify-content: center; gap: var(--space-3); }

/* ---------- 9. Sections ---------- */
.sec { padding: var(--space-8) 0; }
.how-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-4); }
.how-card { padding: var(--space-5); background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); transition: var(--transition); }
.how-card:hover { background: var(--bg-card-hover); border-color: var(--green-primary); }
.how-card .ic { font-size: 1.6rem; display: block; margin-bottom: 6px; }
.how-card h3 { font-size: 1.05rem; }
.how-card p { margin: 0; color: var(--text-secondary); font-size: .93rem; }
.prose { max-width: 820px; margin: 0 auto; }
.prose h2 { font-size: clamp(1.5rem, 3vw, 2rem); margin-top: var(--space-7); }
.prose h2:first-child { margin-top: 0; }
.prose h3 { font-size: 1.2rem; margin-top: var(--space-5); color: var(--green-primary); }
.prose p, .prose li { color: var(--text-primary); opacity: .92; }
.prose ul, .prose ol { padding-left: 22px; margin: 0 0 var(--space-4); }
.prose li { margin-bottom: 6px; }
.table-wrap { overflow-x: auto; margin: 0 0 var(--space-4); border: 1px solid var(--border); border-radius: var(--radius-sm); }
.prose table { width: 100%; border-collapse: collapse; font-size: .92rem; }
.prose th, .prose td { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--border); }
.prose th { background: var(--bg-card); color: var(--green-primary); }
.prose tr:last-child td { border-bottom: 0; }
.faq { max-width: 820px; margin: 0 auto; }
.faq details { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); margin-bottom: var(--space-3); transition: var(--transition-fast); }
.faq details[open] { border-color: var(--green-primary); }
.faq summary { list-style: none; cursor: pointer; position: relative; padding: 18px 56px 18px 22px; font-weight: 700; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 22px; top: 50%; transform: translateY(-50%); font-size: 1.6rem; line-height: 1; color: var(--green-primary); }
.faq details[open] summary::after { content: "\2212"; }
.faq .ans { padding: 0 22px 18px; color: var(--text-secondary); }
.faq .ans p:last-child { margin-bottom: 0; }

/* ---------- 10. Footer ---------- */
.site-footer { margin-top: var(--space-7); padding: var(--space-8) 0 var(--space-5); background: var(--bg-secondary); border-top: 1px solid var(--border); }
.f-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: var(--space-6); }
.f-grid p { color: var(--text-secondary); font-size: .93rem; margin-top: var(--space-3); }
.f-col h4 { font-size: 1rem; margin-bottom: var(--space-3); }
.f-col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.f-col a { color: var(--text-secondary); font-size: .93rem; }
.f-col a:hover { color: var(--green-primary); }
.f-bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: var(--space-3); margin-top: var(--space-6); padding-top: var(--space-5); border-top: 1px solid var(--border); color: var(--text-secondary); font-size: .9rem; }
.f-bottom p { margin: 0; }
.f-links a { margin-left: var(--space-4); color: var(--text-secondary); }
.f-links a:hover { color: var(--green-primary); }
.f-note { margin: var(--space-4) 0 0; font-size: .82rem; color: var(--text-muted); }

/* ---------- 11. Toast ---------- */
.toast {
  position: fixed; left: 50%; bottom: 24px; transform: translate(-50%, 20px); z-index: 300; opacity: 0; pointer-events: none;
  background: var(--green-primary); color: var(--btn-text); padding: 10px 20px; border-radius: var(--radius-pill); font-weight: 700; transition: var(--transition);
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ---------- 12. Responsive ---------- */
@media (max-width: 900px) {
  .f-grid { grid-template-columns: 1fr 1fr; }
  .burger { display: flex; }
  .nav {
    position: absolute; top: 100%; left: 0; right: 0; flex-direction: column; gap: 0; padding: var(--space-2) var(--space-5) var(--space-4);
    background: var(--bg-secondary); border-bottom: 1px solid var(--border); display: none;
  }
  .nav.open { display: flex; }
  .nav a { padding: 12px 0; border-bottom: 1px solid var(--border); }
}
@media (max-width: 640px) {
  .wrap { padding: 0 var(--space-4); }
  .tool { padding: var(--space-4); border-radius: var(--radius); }
  .how-grid { grid-template-columns: 1fr; }
  .f-grid { grid-template-columns: 1fr; }
  .hero { padding-top: var(--space-7); }
  .f-links a { margin: 0 var(--space-3) 0 0; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}