:root{
  --bg:#f7f4ee;
  --surface:#ffffff;
  --ink:#24313a;
  --muted:#6d787d;
  --line:#e7e2d8;
  --teal:#0e7c74;
  --teal-deep:#0b5c57;
  --coral:#e07856;
  --coral-deep:#c45f41;
  --gold:#d8a441;
  --slab:"Zilla Slab",Georgia,serif;
  --sans:"Karla",system-ui,-apple-system,sans-serif;
  --radius:16px;
  --shadow:0 20px 50px rgba(36,49,58,.09);
  --pad:clamp(20px,4vw,44px);
  --max:1180px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--sans);background:var(--bg);color:var(--ink);line-height:1.6;font-size:16px;overflow-x:hidden}
a{color:inherit}
img{max-width:100%;display:block}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--teal-deep);color:#fff;padding:10px 16px;border-radius:0 0 8px 0;z-index:60}
.skip-link:focus{left:0;top:0}
.wrap{max-width:var(--max);margin:0 auto;padding:0 var(--pad)}

.site-head{position:sticky;top:0;z-index:40;background:rgba(247,244,238,.9);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.head-inner{display:flex;align-items:center;justify-content:space-between;height:66px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none}
.logo{width:38px;height:38px}
.brand-name{font-family:var(--slab);font-size:22px;font-weight:700;letter-spacing:-.3px}
.brand-name span{color:var(--coral)}
.site-nav ul{display:flex;align-items:center;gap:6px;list-style:none}
.site-nav a{display:inline-block;padding:9px 14px;border-radius:999px;text-decoration:none;font-weight:700;font-size:15px;color:var(--muted);transition:.2s}
.site-nav a:hover{background:var(--line);color:var(--ink)}
.menu-btn{display:none;background:none;border:1px solid var(--line);border-radius:999px;padding:9px 16px;font:700 15px var(--sans);color:var(--ink);cursor:pointer}
@media(max-width:720px){
  .site-nav .menu-btn{display:inline-block}
  .site-nav ul{gap:2px}
  .site-nav:has(.menu-btn) ul{display:none;position:absolute;top:66px;left:0;right:0;flex-direction:column;background:var(--surface);border-bottom:1px solid var(--line);border-top:1px solid var(--line);padding:12px var(--pad)}
  .site-nav.open:has(.menu-btn) ul{display:flex}
  .site-nav a{padding:13px 14px;font-size:16px}
  .site-nav:has(.menu-btn) a::before{content:"· ";color:var(--coral)}
}

.hero{padding:56px 0 8px;text-align:center}
.eyebrow{font-size:12.5px;letter-spacing:.18em;text-transform:uppercase;font-weight:800;color:var(--coral);margin-bottom:12px}
.hero h1{font-family:var(--slab);font-size:clamp(34px,5vw,54px);line-height:1.1;letter-spacing:-.5px;margin-bottom:16px}
.hero .lede{max-width:640px;margin:0 auto;color:var(--muted);font-size:18px}
@media(max-width:720px){.hero{padding:36px 0 4px}}

.tool{margin-top:30px}
.toolbar{display:flex;align-items:flex-end;justify-content:space-between;gap:14px;flex-wrap:wrap;margin-bottom:14px}
.tool-title{font-family:var(--slab);font-size:26px;font-weight:700;line-height:1.1}
.tool-sub{color:var(--muted);font-size:13.5px}
.btn-group{display:flex;gap:10px;flex-wrap:wrap}
.btn-add{border:0;cursor:pointer;font:700 15px var(--sans);background:var(--teal);color:#fff;padding:12px 20px;border-radius:11px;transition:.2s;box-shadow:0 8px 20px rgba(14,124,116,.22)}
.btn-add:hover{background:var(--teal-deep);transform:translateY(-2px)}
.btn-add.ghost{background:var(--coral)}
.btn-add.ghost:hover{background:var(--coral-deep);box-shadow:0 8px 20px rgba(224,120,86,.22)}

.course-tabs{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:14px}
.c-tab{border:1px solid var(--line);background:var(--surface);border-radius:999px;padding:9px 18px;font:700 14px var(--sans);color:var(--muted);cursor:pointer;display:flex;align-items:center;gap:8px;transition:.2s}
.c-tab:hover{border-color:var(--teal)}
.c-tab.active{background:var(--teal);border-color:var(--teal);color:#fff}
.c-tab .x{opacity:.6;font-size:16px;line-height:1;cursor:pointer;padding:0 2px}
.c-tab .x:hover{opacity:1}
.c-tab .badge{background:#eaf3ef;color:var(--teal-deep);border-radius:999px;font-size:11.5px;font-weight:800;padding:2px 8px}
.c-tab.active .badge{background:rgba(255,255,255,.2);color:#fff}

.course-app{display:none;animation:rise .35s ease}
.course-app.active{display:block}
@keyframes rise{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}

.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}
.table-wrap{padding:0}
.grade-table{width:100%;border-collapse:collapse}
.grade-table thead th{font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);font-weight:800;text-align:left;padding:14px;border-bottom:2px solid var(--line);background:#fbf8f2}
.grade-table tbody td{padding:10px 14px;border-bottom:1px solid var(--line);vertical-align:middle}
.grade-row input[type=text],.grade-row input[type=number],.grade-row select{border:1px solid var(--line);background:var(--bg);border-radius:9px;font:600 15px var(--sans);color:var(--ink);padding:10px 12px;width:100%;outline:none;transition:.2s}
.grade-row input:focus,.grade-row select:focus{border-color:var(--teal);box-shadow:0 0 0 3px rgba(14,124,116,.12)}
.col-name .cname{min-width:130px}
.col-weight{width:110px}
.col-score{width:120px}
.col-total{width:120px}
.grade-row .cell-weight-sum{display:block;font-size:11.5px;color:var(--muted);margin-top:3px}
.cell-act{width:52px;text-align:center}
.btn-del{background:none;border:1px solid transparent;border-radius:9px;width:36px;height:36px;cursor:pointer;color:var(--muted);font:700 17px var(--sans);transition:.2s}
.btn-del:hover{color:#b3251d;border-color:#ecc;background:#fdf0ef}
.weight-hint{font-size:12px;padding:8px 14px;color:var(--muted);font-weight:600}
.weight-hint.ok{color:var(--teal-deep)}
.empty-note{padding:34px;text-align:center;color:var(--muted);font-size:15px}
@media(max-width:680px){
  .grade-table thead{display:none}
  .grade-row{display:block;padding:14px 12px 12px}
  .grade-row td{display:grid;grid-template-columns:1fr 1fr;gap:10px;padding:6px 0;border-bottom:none}
  .grade-row .cell-act{position:absolute;top:12px;right:10px}
  .grade-row{position:relative}
  .grade-row td::before{content:attr(data-label);font-size:11px;letter-spacing:.05em;text-transform:uppercase;color:var(--muted);font-weight:700;grid-column:1/-1}
  .col-name .cname{min-width:0}
}

/* course result */
.course-result{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:0;border-top:2px solid var(--line);background:#fbf8f2}
.cur-box{padding:22px}
.cur-box.hl{background:linear-gradient(135deg,var(--teal),var(--teal-deep));color:#fff}
.cur-box h4{font-size:12.5px;letter-spacing:.07em;text-transform:uppercase;font-weight:800;color:var(--muted);margin-bottom:4px}
.cur-box.hl h4{color:#c9e7e1}
.cur-box .big{font-family:var(--slab);font-size:36px;font-weight:700;line-height:1.1}
.cur-box.hl .big{color:#fff}
.cur-box .sub{color:var(--muted);font-size:13px;font-weight:600}
.cur-box.hl .sub{color:#cfece6}
.cur-box .small{font-size:13px;color:var(--muted);margin-top:4px}
@media(max-width:760px){.course-result{grid-template-columns:1fr}.cur-box.hl{order:-1}}

.input-field{display:flex;flex-direction:column;gap:6px}
.input-field label{font-weight:700;font-size:13.5px}
.input-field input{border:1px solid var(--line);background:var(--bg);border-radius:10px;font:700 17px var(--sans);color:var(--ink);padding:11px 12px;outline:none;transition:.2s;width:100%}
.input-field input:focus{border-color:var(--teal);box-shadow:0 0 0 3px rgba(14,124,116,.12)}

/* simulation */
.sim{padding:22px}
.sim h4{font-size:12.5px;letter-spacing:.07em;text-transform:uppercase;font-weight:800;color:var(--muted);margin-bottom:6px}
.sim-bar{display:flex;height:26px;border-radius:7px;overflow:hidden;margin:8px 0 6px}
.sim-chunk{display:flex;align-items:center;justify-content:center;font-size:10.5px;font-weight:800;color:#fff}
.sim-legend{display:flex;flex-wrap:wrap;gap:12px;font-size:13px;color:var(--muted);margin-top:6px}
.sim-legend .lg{display:inline-flex;align-items:center;gap:6px}
.sim-legend .dot{width:12px;height:12px;border-radius:3px;display:inline-block}

/* summary */
.summary{margin-top:30px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px}
.summary-head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:16px}
.summary-head h3{font-family:var(--slab);font-size:24px}
.summary-hint{color:var(--muted);font-size:13px;font-weight:600}
.summary-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.sum-card{background:var(--bg);border:1px solid var(--line);border-radius:13px;padding:18px;text-align:center}
.sum-card .k{display:block;font-size:12px;text-transform:uppercase;letter-spacing:.07em;font-weight:800;color:var(--muted)}
.sum-card .v{font-family:var(--slab);font-size:30px;font-weight:700;color:var(--teal-deep);display:block}
.sum-card .sub{color:var(--muted);font-size:13px;font-weight:600}
@media(max-width:640px){.summary-grid{grid-template-columns:1fr}}

/* legend */
.legend{margin-top:70px}
.legend-head h2{font-family:var(--slab);font-size:clamp(26px,3.6vw,38px);margin-bottom:18px}
.legend-row{display:grid;grid-template-columns:repeat(10,1fr);gap:6px}
.legend-cell{border-radius:9px;padding:12px 6px;text-align:center;color:#fff}
.legend-cell small{display:block;opacity:.85;font-size:11px;font-weight:600}
.legend-cell b{font-size:16px}
@media(max-width:720px){.legend-row{grid-template-columns:repeat(5,1fr)}}

.faq{margin-top:70px}
.faq h2{font-family:var(--slab);font-size:clamp(26px,3.6vw,38px);margin-bottom:20px}
.faq-item{border:1px solid var(--line);border-radius:14px;background:var(--surface);margin-bottom:12px;overflow:hidden}
.faq-item summary{cursor:pointer;list-style:none;padding:18px 22px;font-weight:700;font-size:16.5px;position:relative;padding-right:44px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";position:absolute;right:22px;top:13px;font-size:22px;color:var(--teal);transition:.2s}
.faq-item[open] summary::after{content:"–"}
.faq-item p{padding:0 22px 18px;color:var(--muted)}

.articles-teaser{margin-top:70px}
.teaser-head{display:flex;align-items:baseline;justify-content:space-between;gap:14px;margin-bottom:18px}
.teaser-head h2{font-family:var(--slab);font-size:clamp(24px,3.2vw,34px)}
.text-link{color:var(--teal);font-weight:800;text-decoration:none}
.text-link:hover{text-decoration:underline}
.teaser-card a{display:block;text-decoration:none;background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:22px;margin-bottom:14px;transition:.2s}
.teaser-card a:hover{border-color:var(--teal);transform:translateY(-3px);box-shadow:var(--shadow)}
.teaser-card h3{font-family:var(--slab);font-size:19px;margin-bottom:6px}
.teaser-card p{color:var(--muted);font-size:15px}

.page{padding:56px 0}
.page-narrow{max-width:820px}
.page h1{font-family:var(--slab);font-size:clamp(28px,4vw,42px);line-height:1.15;margin-bottom:18px}
.article-meta{display:flex;gap:16px;color:var(--muted);font-size:13.5px;font-weight:600;margin-bottom:26px}
.article-meta span+span::before{content:"·";margin-right:16px}
.article-body p{margin-bottom:16px;color:#2f3b46;font-size:16.5px}
.article-body h2{font-family:var(--slab);font-size:24px;margin:30px 0 12px}
.article-body h3{font-family:var(--slab);font-size:19px;margin:24px 0 10px}
.article-body ul,.article-body ol{margin:0 0 18px 22px}
.article-body li{margin-bottom:8px;color:#2f3b46}
.article-body blockquote{border-left:4px solid var(--teal);padding:4px 0 4px 18px;color:var(--muted);font-family:var(--slab);font-style:italic;margin:20px 0}
.article-body table{width:100%;border-collapse:collapse;margin:20px 0}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 12px;text-align:left;font-size:15px}
.article-body th{background:var(--bg)}

.guide-list{display:grid;grid-template-columns:1fr;gap:14px;margin-top:8px}
.guide-card{display:block;text-decoration:none;background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:22px;transition:.2s}
.guide-card:hover{border-color:var(--teal);box-shadow:var(--shadow)}
.guide-card h3{font-family:var(--slab);font-size:19px;margin-bottom:6px}
.guide-card p{color:var(--muted);font-size:15px}

.site-foot{margin-top:80px;border-top:1px solid var(--line);background:#f2eee5;padding:40px 0 30px}
.foot-grid{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap}
.foot-brand{font-weight:700;color:var(--ink)}
.site-foot nav ul{display:flex;gap:18px;list-style:none;flex-wrap:wrap}
.site-foot nav a{text-decoration:none;color:var(--muted);font-size:14.5px;font-weight:600}
.site-foot nav a:hover{color:var(--teal-deep)}
.foot-legal{margin-top:18px;color:var(--muted);font-size:13px;border-top:1px dashed var(--line);padding-top:18px}
@media(max-width:600px){.foot-grid{flex-direction:column;align-items:flex-start}}

.cookie-banner{position:fixed;left:0;right:0;bottom:0;background:#24313a;color:#f3eee4;padding:16px var(--pad);display:none;justify-content:center;gap:14px;align-items:center;flex-wrap:wrap;z-index:80;font-size:14.5px}
.cookie-banner p{max-width:820px}
.cookie-banner button{border:1px solid rgba(255,255,255,.4);background:transparent;color:#fff;padding:7px 16px;border-radius:999px;cursor:pointer;font:600 14px var(--sans);margin-left:8px}
.cookie-banner button:hover{background:#fff;color:#24313a}

@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}