:root{
  --navy:#132848;
  --navy-2:#1d3a63;
  --teal:#0ea5a3;
  --teal-light:#e6f7f6;
  --gold:#f0a93a;
  --red:#e35d5d;
  --ink:#1c2733;
  --sub:#5b6b7c;
  --line:#e4e9ef;
  --bg:#f6f8fb;
  --card:#ffffff;
  --radius:16px;
  --shadow:0 8px 24px rgba(19,40,72,.08);
  --shadow-lg:0 16px 40px rgba(19,40,72,.14);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"Hiragino Kaku Gothic ProN","Noto Sans JP","Yu Gothic",-apple-system,BlinkMacSystemFont,sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.7;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(19,40,72,.96);
  backdrop-filter:blur(6px);
  color:#fff;
  border-bottom:1px solid rgba(255,255,255,.08);
}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:16px;letter-spacing:.02em}
.brand .mark{
  width:34px;height:34px;border-radius:9px;
  background:linear-gradient(135deg,var(--teal),var(--navy-2));
  display:flex;align-items:center;justify-content:center;
  font-size:13px;font-weight:800;color:#fff;
}
.brand small{display:block;font-weight:400;font-size:11px;color:#9db2c9;letter-spacing:.03em}
nav.mainnav{display:flex;gap:4px}
nav.mainnav a{
  padding:9px 14px;border-radius:999px;font-size:13.5px;font-weight:600;color:#cfe0ee;
  transition:.15s;
}
nav.mainnav a:hover{background:rgba(255,255,255,.08);color:#fff}
nav.mainnav a.active{background:var(--teal);color:#08302f}

/* ---------- Hero ---------- */
.hero{
  position:relative;color:#fff;overflow:hidden;
  background:linear-gradient(115deg,var(--navy) 0%,var(--navy-2) 55%,#0c4a49 130%);
}
.hero .wrap{padding:72px 24px 84px;display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center}
.hero .tag{
  display:inline-flex;align-items:center;gap:8px;
  background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.18);
  padding:6px 14px;border-radius:999px;font-size:12.5px;font-weight:600;color:var(--teal-light);
  margin-bottom:18px;
}
.hero h1{font-size:38px;line-height:1.4;margin:0 0 16px;font-weight:800}
.hero h1 em{font-style:normal;color:var(--teal-light);background:rgba(14,165,163,.25);padding:0 6px;border-radius:6px}
.hero p.lead{font-size:15.5px;color:#c9d8e6;max-width:520px;margin:0 0 28px}
.hero .cta-row{display:flex;gap:12px;flex-wrap:wrap}
.hero .media{
  position:relative;border-radius:20px;overflow:hidden;box-shadow:var(--shadow-lg);
  border:1px solid rgba(255,255,255,.15);
}
.hero .media img{height:340px;width:100%;object-fit:cover}
.hero .media .cap{
  position:absolute;left:16px;bottom:16px;right:16px;
  background:rgba(9,20,38,.72);backdrop-filter:blur(4px);
  padding:12px 14px;border-radius:12px;font-size:12.5px;color:#e7eef6;
}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:12px 22px;border-radius:11px;font-weight:700;font-size:14px;
  border:1px solid transparent;cursor:pointer;transition:.15s;
}
.btn-primary{background:var(--teal);color:#06302e}
.btn-primary:hover{background:#0c8f8d;transform:translateY(-1px)}
.btn-ghost{background:rgba(255,255,255,.06);color:#fff;border-color:rgba(255,255,255,.35)}
.btn-ghost:hover{background:rgba(255,255,255,.14)}
.btn-dark{background:var(--navy);color:#fff}
.btn-dark:hover{background:var(--navy-2)}
.btn-outline{background:#fff;color:var(--navy);border-color:var(--line)}
.btn-outline:hover{border-color:var(--teal);color:var(--teal)}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}
.btn-block{width:100%;justify-content:center}

/* ---------- Personal note banner ---------- */
.personal-note{
  background:#fff8ec;border:1px solid #f3e0b6;border-left:4px solid var(--gold);
  border-radius:12px;padding:16px 20px;font-size:13.5px;color:#6b5518;
  display:flex;gap:12px;align-items:flex-start;
}
.personal-note b{color:#3c2f08}

/* ---------- Section generic ---------- */
.section{padding:64px 0}
.section-head{max-width:640px;margin:0 auto 40px;text-align:center}
.section-head .kicker{color:var(--teal);font-weight:700;font-size:12.5px;letter-spacing:.08em;text-transform:uppercase}
.section-head h2{font-size:27px;margin:8px 0 10px;color:var(--navy)}
.section-head p{color:var(--sub);font-size:14.5px}

/* ---------- Feature cards ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.feature-card{
  background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);
  overflow:hidden;border:1px solid var(--line);transition:.2s;
}
.feature-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.feature-card img{height:150px;width:100%;object-fit:cover}
.feature-card .body{padding:20px}
.feature-card .num{
  display:inline-flex;width:26px;height:26px;border-radius:8px;background:var(--teal-light);
  color:var(--teal);font-weight:800;font-size:12.5px;align-items:center;justify-content:center;margin-bottom:10px;
}
.feature-card h3{margin:0 0 8px;font-size:16px;color:var(--navy)}
.feature-card p{margin:0 0 14px;font-size:13.5px;color:var(--sub)}
.feature-card .link{font-size:13px;font-weight:700;color:var(--teal)}

/* ---------- Demo shell (app pages) ---------- */
.demo-shell{padding:36px 0 72px}
.demo-head{margin-bottom:22px}
.demo-head .crumb{font-size:12.5px;color:var(--sub);margin-bottom:6px}
.demo-head h1{font-size:23px;margin:0 0 6px;color:var(--navy)}
.demo-head p{margin:0;color:var(--sub);font-size:13.5px}
.panel{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:24px;
}
.panel + .panel{margin-top:20px}
.panel h2{margin:0 0 4px;font-size:16px;color:var(--navy)}
.panel .hint{font-size:12.5px;color:var(--sub);margin:0 0 16px}

textarea.essay{
  width:100%;min-height:220px;border:1px solid var(--line);border-radius:12px;
  padding:16px;font-size:14px;line-height:1.8;resize:vertical;font-family:inherit;color:var(--ink);
  background:#fbfcfe;
}
textarea.essay:focus{outline:none;border-color:var(--teal);box-shadow:0 0 0 3px rgba(14,165,163,.12)}
.meta-row{display:flex;justify-content:space-between;align-items:center;margin-top:10px;font-size:12.5px;color:var(--sub)}
.meta-row .count b{color:var(--navy)}
.meta-row .count.warn b{color:var(--red)}

.two-col{display:grid;grid-template-columns:1.3fr .9fr;gap:20px;align-items:start}

/* ---------- Score UI ---------- */
.score-hero{display:flex;align-items:center;gap:20px;margin-bottom:18px}
.score-ring{
  width:96px;height:96px;border-radius:50%;
  background:conic-gradient(var(--teal) calc(var(--pct)*1%),var(--line) 0);
  display:flex;align-items:center;justify-content:center;flex-shrink:0;
}
.score-ring .in{
  width:76px;height:76px;border-radius:50%;background:#fff;display:flex;flex-direction:column;
  align-items:center;justify-content:center;
}
.score-ring .in b{font-size:22px;color:var(--navy);line-height:1}
.score-ring .in span{font-size:10px;color:var(--sub)}
.score-summary h3{margin:0 0 4px;font-size:15px;color:var(--navy)}
.score-summary p{margin:0;font-size:13px;color:var(--sub)}

.bar-item{margin-bottom:14px}
.bar-item .lbl{display:flex;justify-content:space-between;font-size:12.5px;margin-bottom:6px;color:var(--navy);font-weight:600}
.bar-track{height:8px;background:var(--line);border-radius:99px;overflow:hidden}
.bar-fill{height:100%;background:linear-gradient(90deg,var(--teal),#0c8f8d);border-radius:99px;transition:width .6s ease}

.feedback-list{list-style:none;margin:0;padding:0}
.feedback-list li{
  display:flex;gap:10px;padding:12px 0;border-top:1px solid var(--line);font-size:13.5px;color:var(--ink);
}
.feedback-list li:first-child{border-top:none}
.feedback-list li .tag{
  flex-shrink:0;font-size:11px;font-weight:700;padding:3px 8px;border-radius:6px;height:fit-content;white-space:nowrap;
}
.tag-vocab{background:#eef3ff;color:#3355c8}
.tag-grammar{background:#fff0ef;color:#c8452f}
.tag-structure{background:#f1eeff;color:#6c3bd1}
.tag-content{background:var(--teal-light);color:#0c8f8d}
.tag-good{background:#eafaf0;color:#1f9d55}
.tag-fluency{background:#fff7e6;color:#b9790a}

/* ---------- Recorder ---------- */
.recorder{text-align:center;padding:26px 10px}
.rec-btn{
  width:92px;height:92px;border-radius:50%;border:none;cursor:pointer;
  background:linear-gradient(135deg,var(--red),#c33f3f);color:#fff;font-size:28px;
  box-shadow:0 8px 22px rgba(227,93,93,.35);transition:.15s;display:inline-flex;align-items:center;justify-content:center;
}
.rec-btn:hover{transform:scale(1.04)}
.rec-btn.active{animation:pulse 1.4s infinite}
@keyframes pulse{
  0%{box-shadow:0 0 0 0 rgba(227,93,93,.45)}
  70%{box-shadow:0 0 0 18px rgba(227,93,93,0)}
  100%{box-shadow:0 0 0 0 rgba(227,93,93,0)}
}
.timer{font-size:34px;font-weight:800;color:var(--navy);margin:16px 0 4px;font-variant-numeric:tabular-nums}
.rec-status{font-size:13px;color:var(--sub);margin-bottom:18px}
canvas.wave{width:100%;height:64px;background:#fbfcfe;border:1px solid var(--line);border-radius:10px}
.transcript-box{
  min-height:90px;border:1px dashed var(--line);border-radius:12px;padding:14px;font-size:13.5px;
  color:var(--ink);background:#fbfcfe;margin-top:14px;
}
.transcript-box.placeholder{color:#9aa8b6}

/* ---------- SCBT exam shell ---------- */
.exam-shell{background:var(--navy);border-radius:20px;padding:0;overflow:hidden;box-shadow:var(--shadow-lg)}
.exam-topbar{display:flex;justify-content:space-between;align-items:center;padding:16px 24px;background:#0e1f39;color:#fff}
.exam-topbar .qnum{font-size:12.5px;color:#9db2c9}
.exam-topbar .clock{font-size:20px;font-weight:800;font-variant-numeric:tabular-nums}
.exam-topbar .clock.low{color:#ff8a80}
.exam-body{background:#fff;padding:28px}
.exam-question{background:var(--teal-light);border-radius:12px;padding:18px 20px;font-size:14.5px;color:#0a4a49;margin-bottom:20px;border:1px solid #c9ece9}
.mode-switch{display:inline-flex;background:var(--bg);border:1px solid var(--line);border-radius:99px;padding:3px;margin-bottom:16px}
.mode-switch button{border:none;background:transparent;padding:8px 16px;border-radius:99px;font-size:12.5px;font-weight:700;color:var(--sub);cursor:pointer}
.mode-switch button.active{background:var(--navy);color:#fff}

/* ---------- Table / sheet demo ---------- */
.view-switch{display:flex;gap:8px;margin-bottom:18px}
.view-switch button{
  border:1px solid var(--line);background:#fff;padding:8px 16px;border-radius:9px;font-size:12.5px;font-weight:700;
  color:var(--sub);cursor:pointer;
}
.view-switch button.active{background:var(--navy);color:#fff;border-color:var(--navy)}
table.sheet{width:100%;border-collapse:collapse;font-size:13px}
table.sheet th{
  background:#eef2f6;color:var(--sub);text-align:left;padding:10px 12px;font-size:11.5px;
  text-transform:uppercase;letter-spacing:.03em;border-bottom:1px solid var(--line);
}
table.sheet td{padding:10px 12px;border-bottom:1px solid var(--line);vertical-align:top}
table.sheet td[contenteditable=true]{cursor:text}
table.sheet td[contenteditable=true]:focus{outline:2px solid var(--teal);outline-offset:-2px;background:#f2fdfc}
table.sheet tr:hover td{background:#fafcfe}
.rowtag{font-size:10.5px;font-weight:700;padding:2px 7px;border-radius:5px;background:var(--teal-light);color:#0c8f8d}
pre.json-view{
  background:#0e1f39;color:#c9e8e7;padding:20px;border-radius:12px;font-size:12.5px;line-height:1.7;
  overflow:auto;max-height:420px;
}
pre.json-view .k{color:#7fd8ff}
pre.json-view .s{color:#ffd479}

/* ---------- Manual / footer callout ---------- */
.callout{
  background:var(--navy);color:#fff;border-radius:20px;padding:44px;text-align:center;margin-top:8px;
}
.callout h2{margin:0 0 10px;font-size:22px}
.callout p{color:#c9d8e6;font-size:13.5px;max-width:520px;margin:0 auto 22px}

footer.site-footer{border-top:1px solid var(--line);padding:32px 0;color:var(--sub);font-size:12.5px;text-align:center;background:#fff}
footer.site-footer b{color:var(--navy)}

.badge-row{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px}
.badge{background:var(--teal-light);color:#0c8f8d;font-size:11.5px;font-weight:700;padding:4px 10px;border-radius:99px}

.toast{
  position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(20px);
  background:var(--navy);color:#fff;padding:12px 22px;border-radius:99px;font-size:13px;
  box-shadow:var(--shadow-lg);opacity:0;pointer-events:none;transition:.25s;z-index:100;
}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

@media (max-width:900px){
  .hero .wrap{grid-template-columns:1fr}
  .grid-3{grid-template-columns:1fr}
  .grid-2{grid-template-columns:1fr}
  .two-col{grid-template-columns:1fr}
  nav.mainnav{display:none}
}