:root{
  --gc-bg:linear-gradient(180deg, rgba(255,255,255,.96) 0%, rgba(246,248,255,.96) 100%);
  --gc-line:rgba(126,137,189,.18);
  --gc-line-strong:rgba(92,107,178,.24);
  --gc-text:#1d2b57;
  --gc-muted:#60708d;
  --gc-blue:#3577ff;
  --gc-indigo:#5a4ff4;
  --gc-pink:#d85cff;
  --gc-cyan:#6bc8ff;
  --gc-shadow:0 22px 56px rgba(82,93,140,.12);
  --gc-shadow-soft:0 12px 28px rgba(82,93,140,.09);
  --gc-radius-xl:28px;
  --gc-radius-lg:20px;
  --gc-radius-md:16px;
}
.gc-page{display:grid;gap:18px;padding-bottom:8px}
.gc-hero,.gc-panel,.gc-results,.gc-content-card,.gc-info-card{
  position:relative;
  overflow:hidden;
  border:1px solid var(--gc-line);
  background:var(--gc-bg);
  box-shadow:var(--gc-shadow);
}
.gc-hero::before,.gc-panel::before,.gc-results::before,.gc-content-card::before,.gc-info-card::before{
  content:"";
  position:absolute;
  inset:auto -9% -28% auto;
  width:280px;
  height:280px;
  background:radial-gradient(circle, rgba(107,200,255,.18) 0%, rgba(107,200,255,0) 66%);
  pointer-events:none;
}
.gc-hero{padding:14px 16px;border-radius:var(--gc-radius-xl)}
.gc-brand-banner{display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:12px}
.gc-brand-mark{position:relative;width:62px;height:62px;border-radius:20px;background:linear-gradient(180deg, rgba(65,113,255,.16), rgba(104,77,255,.1));border:1px solid rgba(77,92,255,.16);box-shadow:inset 0 1px 0 rgba(255,255,255,.7)}
.gc-cap-top,.gc-cap-base,.gc-cap-tassel{position:absolute;display:block}
.gc-cap-top{left:11px;top:15px;width:40px;height:16px;border-radius:8px;background:linear-gradient(135deg,#2d55d8,#67baff);transform:skewX(-28deg);box-shadow:0 10px 18px rgba(53,119,255,.22)}
.gc-cap-base{left:18px;top:31px;width:24px;height:11px;border-radius:0 0 12px 12px;background:linear-gradient(180deg,#2847a5,#4f68ff)}
.gc-cap-tassel{right:12px;top:26px;width:4px;height:18px;border-radius:999px;background:linear-gradient(180deg,#ffdd78,#ffae2d)}
.gc-cap-tassel::after{content:"";position:absolute;left:-4px;bottom:-3px;width:12px;height:12px;border-radius:999px;background:radial-gradient(circle,#ffe6a6 0%,#ffbe45 74%)}
.gc-brand-copy h1{margin:0;font-size:clamp(1.85rem,4vw,2.7rem);line-height:1;letter-spacing:-.06em;background:linear-gradient(90deg,#2d86ff 0%, #5a4ff4 54%, #7b4cff 100%);-webkit-background-clip:text;background-clip:text;color:transparent}
.gc-eyebrow{margin:0 0 6px;font-size:.82rem;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:#63739a}
.gc-intro{margin:6px 0 0;max-width:40ch;font-size:.98rem;line-height:1.55;color:var(--gc-muted)}
.gc-brand-badge{display:inline-flex;align-items:center;justify-content:center;min-width:102px;min-height:56px;padding:0 16px;border-radius:20px;border:1px solid rgba(103,105,255,.24);background:linear-gradient(135deg, rgba(70,145,255,.16), rgba(216,92,255,.18));box-shadow:inset 0 1px 0 rgba(255,255,255,.82), 0 18px 26px rgba(92,107,178,.14);font-size:1rem;font-weight:900;color:#2c4fa5;text-transform:uppercase;letter-spacing:.06em}
.gc-brand-copy-compact{max-width:100%;text-align:left}
.gc-badge-row,.gc-link-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.gc-badge-row span,.gc-link-row a{display:inline-flex;align-items:center;min-height:34px;padding:0 12px;border-radius:999px;border:1px solid var(--gc-line);background:rgba(255,255,255,.9);font-size:.88rem;font-weight:700;color:#41516f}
.gc-link-row a{background:linear-gradient(180deg,#fff 0%,#f6f8ff 100%)}
.gc-link-row a:hover{border-color:rgba(77,92,255,.25);color:#324ab6;transform:translateY(-1px)}
.gc-shell{display:grid;gap:18px}
.gc-panel{padding:14px 16px 16px;border-radius:var(--gc-radius-xl)}
.gc-panel-head{display:flex;align-items:flex-end;justify-content:space-between;gap:14px;padding-bottom:12px;border-bottom:1px solid rgba(126,137,189,.18)}
.gc-panel-kicker{margin:0 0 6px;font-size:.84rem;font-weight:800;letter-spacing:.1em;text-transform:uppercase;color:#6c7aa0}
.gc-panel-head h2{margin:0;font-size:1.5rem;letter-spacing:-.04em;color:var(--gc-text)}
.gc-panel-note{max-width:48ch;margin:0;font-size:.95rem;line-height:1.6;color:var(--gc-muted)}
.gc-table{margin-top:0;overflow-x:auto;-webkit-overflow-scrolling:touch}
.gc-table-head,.gc-row{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,.72fr) minmax(0,.62fr) minmax(0,.9fr) minmax(0,.9fr) 36px;gap:8px;align-items:center}
.gc-table-head{padding:0 4px 10px}
.gc-table-head span{font-size:.9rem;font-weight:800;color:#4a5a7d}
.gc-head-action{opacity:0}
.gc-rows{display:grid;gap:10px}
.gc-row{padding:10px;border-radius:18px;border:1px solid rgba(126,137,189,.18);background:linear-gradient(180deg,#fff 0%,#f8faff 100%);box-shadow:var(--gc-shadow-soft)}
.gc-field,.gc-select,.gc-remove{
  width:100%;
  min-height:54px;
  border-radius:14px;
  border:1px solid rgba(126,137,189,.24);
  background:linear-gradient(180deg,#fff 0%,#f5f8ff 100%);
  color:var(--gc-text);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.88), 0 8px 18px rgba(82,93,140,.07);
}
.gc-field,.gc-select{padding:0 14px;font-size:1.02rem;font-weight:700;outline:none}
.gc-field::placeholder{color:#8592ae}
.gc-field:focus,.gc-select:focus{border-color:rgba(77,92,255,.34);box-shadow:0 0 0 4px rgba(77,92,255,.08), inset 0 1px 0 rgba(255,255,255,.94)}
.gc-remove{display:flex;align-items:center;justify-content:center;padding:0;background:linear-gradient(180deg,#fff 0%,#f5f7ff 100%);font-size:1.12rem;font-weight:900;color:#5c6a88}
.gc-remove:hover{border-color:rgba(77,92,255,.24);color:#2e49bb}
.gc-controls{display:flex;justify-content:center;padding-top:14px}
.gc-add-course,.gc-reset-btn{display:inline-flex;align-items:center;justify-content:center;min-height:50px;padding:0 22px;border-radius:999px;border:1px solid rgba(126,137,189,.26);background:linear-gradient(180deg,#fff 0%,#f1f5ff 100%);box-shadow:0 12px 24px rgba(82,93,140,.12);font-size:1rem;font-weight:900;color:#33436e}
.gc-add-course:hover,.gc-reset-btn:hover{transform:translateY(-1px);border-color:rgba(77,92,255,.28)}
.gc-action-row{display:flex;flex-direction:column;align-items:center;gap:10px;padding-top:16px;border-top:1px solid rgba(126,137,189,.18);margin-top:16px}
.gc-calc-btn{display:inline-flex;align-items:center;justify-content:center;min-width:min(100%,420px);min-height:62px;padding:0 28px;border:0;border-radius:999px;background:linear-gradient(90deg,#1586ff 0%,#4373ff 32%,#7657ff 67%,#e05fff 100%);color:#fff;font-size:1.42rem;font-weight:900;letter-spacing:-.03em;text-transform:uppercase;box-shadow:0 18px 30px rgba(86,87,255,.28), inset 0 -4px 0 rgba(45,51,140,.18), inset 0 2px 0 rgba(255,255,255,.35)}
.gc-calc-btn:hover{transform:translateY(-1px)}
.gc-reset-btn{min-width:min(100%,230px);min-height:42px;color:#55637f}
.gc-results{padding:18px;border-radius:var(--gc-radius-xl)}
.gc-results-title{display:flex;align-items:center;justify-content:center;gap:12px;padding-bottom:14px}
.gc-results-title span{flex:1;max-width:120px;height:1px;background:linear-gradient(90deg, rgba(126,137,189,0) 0%, rgba(126,137,189,.38) 50%, rgba(126,137,189,0) 100%)}
.gc-results-title h2{margin:0;font-size:1.85rem;letter-spacing:-.05em;color:var(--gc-text)}
.gc-results-large{display:grid;gap:14px;grid-template-columns:repeat(2,minmax(0,1fr))}
.gc-result-card{padding:18px;border-radius:22px;border:1px solid rgba(126,137,189,.18);background:linear-gradient(180deg,rgba(255,255,255,.96) 0%, rgba(247,249,255,.94) 100%);box-shadow:var(--gc-shadow-soft)}
.gc-result-card h3{margin:0 0 10px;font-size:1.1rem;letter-spacing:-.03em;color:#30426f}
.gc-result-value{margin:0;font-size:clamp(2.55rem,6vw,4.2rem);font-weight:900;line-height:.95;letter-spacing:-.08em;color:#20325f}
.gc-result-sub{margin:8px 0 0;font-size:.94rem;color:#637391}
.gc-results-mini{display:grid;gap:12px;grid-template-columns:repeat(4,minmax(0,1fr));margin-top:14px}
.gc-result-mini{min-height:140px}
.gc-result-mini-value{margin:16px 0 0;font-size:clamp(1.6rem,4vw,2.55rem);font-weight:900;line-height:1;letter-spacing:-.06em;color:#20325f}
.gc-status{font-size:clamp(1.32rem,3.5vw,2.05rem);display:flex;align-items:center;gap:8px}
.gc-status::before{content:"";width:22px;height:22px;border-radius:999px;background:radial-gradient(circle at 30% 30%, #f9fff2 0%, #62d76a 45%, #2ca74d 100%);box-shadow:0 0 0 4px rgba(98,215,106,.12)}
.gc-summary-note{margin-top:14px;padding:14px 16px;border-radius:18px;border:1px solid rgba(126,137,189,.18);background:linear-gradient(135deg, rgba(53,119,255,.08), rgba(216,92,255,.08));font-size:.98rem;font-weight:700;line-height:1.6;color:#44536e}
.gc-info-grid{display:grid;gap:14px;grid-template-columns:repeat(2,minmax(0,1fr))}
.gc-info-card{padding:18px;border-radius:22px}
.gc-info-card h2,.gc-content-head h2{margin:0 0 10px;font-size:1.35rem;letter-spacing:-.04em;color:var(--gc-text)}
.gc-info-card p,.gc-content-head p,.gc-formula-card p,.gc-note-card p,.gc-example-card p,.gc-faq-item p,.gc-related-card p,.gc-highlight-box li,.gc-step-list li,.gc-reference-list li{margin:0;color:var(--gc-muted);line-height:1.7}
.gc-content-card{padding:20px;border-radius:26px}
.gc-content-head{display:flex;align-items:flex-end;justify-content:space-between;gap:14px;padding-bottom:16px;border-bottom:1px solid rgba(126,137,189,.18)}
.gc-content-head p{max-width:62ch}
.gc-two-col{display:grid;gap:16px;grid-template-columns:1.08fr .92fr;padding-top:16px}
.gc-step-list{display:grid;gap:10px;padding-left:20px;margin:0}
.gc-step-list li{padding-left:4px}
.gc-highlight-box{padding:18px;border-radius:20px;border:1px solid rgba(126,137,189,.18);background:linear-gradient(180deg,#fff 0%,#f6f8ff 100%);box-shadow:var(--gc-shadow-soft)}
.gc-highlight-box h3,.gc-formula-card h3,.gc-example-card h3,.gc-related-card h3{margin:0 0 10px;font-size:1.08rem;letter-spacing:-.03em;color:#2d416a}
.gc-highlight-box ul,.gc-example-card ol{margin:0;padding-left:18px;display:grid;gap:10px}
.gc-formula-grid{display:grid;gap:14px;grid-template-columns:repeat(3,minmax(0,1fr));padding-top:16px}
.gc-formula-card,.gc-note-card,.gc-example-card,.gc-related-card,.gc-faq-item{padding:18px;border-radius:20px;border:1px solid rgba(126,137,189,.18);background:linear-gradient(180deg,#fff 0%,#f7f9ff 100%);box-shadow:var(--gc-shadow-soft)}
.gc-formula-card pre{margin:0 0 12px;padding:14px;border-radius:18px;white-space:pre-wrap;font-family:Inter,ui-sans-serif,system-ui,sans-serif;font-size:.96rem;font-weight:800;line-height:1.7;background:linear-gradient(135deg, rgba(53,119,255,.08), rgba(216,92,255,.08));color:#2c4fb0}
.gc-note-grid{display:grid;gap:14px;grid-template-columns:repeat(2,minmax(0,1fr));padding-top:14px}
.gc-table-wrap{padding-top:16px}
.gc-grade-table{width:100%;border-collapse:collapse;border-spacing:0;overflow:hidden;border-radius:18px;border:1px solid rgba(126,137,189,.18);background:#fff;box-shadow:var(--gc-shadow-soft)}
.gc-grade-table th,.gc-grade-table td{padding:14px 12px;border-bottom:1px solid rgba(126,137,189,.14);text-align:left;font-size:.95rem}
.gc-grade-table thead th{background:linear-gradient(180deg,#f7f9ff 0%,#eef2ff 100%);font-weight:900;color:#34466e}
.gc-grade-table tbody tr:last-child td{border-bottom:0}
.gc-example-grid,.gc-related-grid{display:grid;gap:14px;grid-template-columns:repeat(3,minmax(0,1fr));padding-top:16px}
.gc-example-result{margin-top:12px;font-weight:800;color:#334db1!important}
.gc-faq-list{display:grid;gap:12px;padding-top:16px}
.gc-faq-item summary{cursor:pointer;list-style:none;font-size:1.02rem;font-weight:800;color:#2d416a}
.gc-faq-item summary::-webkit-details-marker{display:none}
.gc-faq-item summary::after{content:"+";float:right;font-size:1.2rem;color:#54658d}
.gc-faq-item[open] summary::after{content:"−"}
.gc-faq-item p{padding-top:10px}
.gc-related-card{display:block}
.gc-related-card:hover{transform:translateY(-2px);border-color:rgba(77,92,255,.24)}
.gc-reference-list{display:grid;gap:10px;padding-left:18px;margin:16px 0 0}
.gc-reference-list a{color:#3053bf;font-weight:700}

@media (min-width:1040px){
  .gc-shell{grid-template-columns:minmax(0,1.08fr) minmax(330px,.92fr);align-items:start}
  .gc-results{position:sticky;top:92px}
}
@media (max-width:1039px){
  .gc-results-large,.gc-results-mini,.gc-info-grid,.gc-two-col,.gc-formula-grid,.gc-note-grid,.gc-example-grid,.gc-related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:759px){
  .gc-page{gap:16px}
  .gc-hero,.gc-results,.gc-content-card,.gc-info-card{padding:14px}
  .gc-panel{padding:12px}
  .gc-brand-banner{grid-template-columns:auto minmax(0,1fr)}
  .gc-brand-badge{grid-column:1/-1;justify-self:start;min-height:44px;min-width:auto;padding:0 14px;font-size:.9rem}
  .gc-brand-copy h1{font-size:2rem}
  .gc-intro{font-size:.9rem;line-height:1.5;max-width:28ch}
  .gc-panel-head{gap:10px}
  .gc-panel-head h2{font-size:1.25rem}
  .gc-panel-note{font-size:.88rem;line-height:1.45}
  .gc-table-head,.gc-row{grid-template-columns:1.15fr .72fr .58fr .9fr .86fr 28px;gap:5px}
  .gc-table-head{padding:0 0 8px}
  .gc-table-head span{font-size:.68rem;letter-spacing:-.03em}
  .gc-row{padding:6px;border-radius:14px}
  .gc-field,.gc-select,.gc-remove{min-height:42px;border-radius:10px}
  .gc-field,.gc-select{padding:0 8px;font-size:.76rem;font-weight:800}
  .gc-remove{font-size:.88rem}
  .gc-add-course,.gc-reset-btn{min-height:42px;padding:0 14px;font-size:.9rem}
  .gc-calc-btn{min-height:50px;font-size:1.05rem;padding:0 18px}
  .gc-results-title h2{font-size:1.45rem}
  .gc-results-large,.gc-results-mini,.gc-info-grid,.gc-two-col,.gc-formula-grid,.gc-note-grid,.gc-example-grid,.gc-related-grid{grid-template-columns:1fr}
  .gc-result-mini{min-height:auto}
  .gc-grade-table th,.gc-grade-table td{padding:12px 10px;font-size:.86rem}
  .gc-content-head{align-items:flex-start;flex-direction:column}
}
@media (max-width:420px){
  .gc-page{gap:14px}
  .gc-hero,.gc-results,.gc-content-card,.gc-info-card{padding:12px}
  .gc-panel{padding:10px}
  .gc-brand-copy h1{font-size:1.82rem}
  .gc-intro{font-size:.84rem;max-width:24ch}
  .gc-table-head,.gc-row{grid-template-columns:1.1fr .68fr .56fr .82fr .82fr 24px;gap:4px}
  .gc-table-head span{font-size:.62rem}
  .gc-field,.gc-select{padding:0 6px;font-size:.69rem}
  .gc-field::placeholder{font-size:.69rem}
  .gc-remove{font-size:.8rem}
  .gc-panel-head h2{font-size:1.12rem}
  .gc-panel-note{font-size:.82rem}
}