/* SGPA to CGPA Calculator - Original Design System */
/* Light theme (default) */
:root{
  color-scheme:light;
  --bg:#f8fafc;
  --card:#ffffff;
  --text:#0f172a;
  --muted:#64748b;
  --border:#e2e8f0;
  --primary:#4f46e5;
  --primary-hover:#4338ca;
  --primary-light:#eef2ff;
  --accent:#06b6d4;
  --success:#059669;
  --warn:#d97706;
  --danger:#dc2626;
  --radius:12px;
  --shadow:0 1px 3px rgba(0,0,0,.07),0 4px 12px rgba(0,0,0,.05);
  --max:1120px;
}
/* Dark theme palette, shared by OS preference and the manual toggle */
@media(prefers-color-scheme:dark){
  :root:not([data-theme="light"]){color-scheme:dark;--bg:#0f1220;--card:#181c33;--text:#eef2ff;--muted:#a5b4fc;--border:#2a2f55;--primary:#818cf8;--primary-hover:#a5b4fc;--primary-light:#1e1b4b;--shadow:0 1px 3px rgba(0,0,0,.4),0 4px 12px rgba(0,0,0,.35)}
}
html[data-theme="dark"]{color-scheme:dark;--bg:#0f1220;--card:#181c33;--text:#eef2ff;--muted:#a5b4fc;--border:#2a2f55;--primary:#818cf8;--primary-hover:#a5b4fc;--primary-light:#1e1b4b;--shadow:0 1px 3px rgba(0,0,0,.4),0 4px 12px rgba(0,0,0,.35)}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Inter,Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%}
.container{max-width:var(--max);margin:0 auto;padding:0 16px}
.skip{position:absolute;left:-9999px;top:auto}
.skip:focus{left:8px;top:8px;background:var(--card);padding:8px 12px;border:2px solid var(--primary);z-index:9999;border-radius:8px}
/* header */
header.site-header{background:var(--card);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:40;backdrop-filter:saturate(1.2) blur(6px)}
.header-row{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 0}
.brand{font-weight:800;font-size:1.15rem;letter-spacing:-.02em;color:var(--text);display:flex;align-items:center;gap:8px}
.brand svg{flex:0 0 auto}
nav.main-nav{display:flex;gap:6px;flex-wrap:wrap;align-items:center}
nav.main-nav a{padding:7px 10px;border-radius:8px;font-size:.9rem;color:var(--muted);font-weight:600}
nav.main-nav a.active,nav.main-nav a:hover{background:var(--primary-light);color:var(--primary);text-decoration:none}
.header-actions{display:flex;gap:8px;align-items:center}
.btn{appearance:none;border:1px solid var(--border);background:var(--card);color:var(--text);padding:9px 14px;border-radius:10px;font-weight:600;font-size:.92rem;cursor:pointer;display:inline-flex;align-items:center;gap:6px;line-height:1}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--primary);border-color:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-hover)}
.btn-ghost{background:transparent}
.btn-sm{padding:6px 10px;font-size:.85rem}
.badge{display:inline-flex;align-items:center;gap:4px;padding:3px 8px;border-radius:999px;font-size:.75rem;font-weight:700;border:1px solid var(--border);background:var(--primary-light);color:var(--primary)}
.badge-warn{background:#fef3c7;border-color:#fde68a;color:#92400e}
.badge-unverified{background:#fef2f2;border-color:#fecaca;color:#991b1b}
.mobile-menu-btn{display:none}
@media(max-width:860px){
  nav.main-nav{display:none}
  nav.main-nav.open{display:flex;flex-direction:column;align-items:stretch;padding:10px 0;border-top:1px solid var(--border);width:100%}
  .header-row{flex-wrap:wrap}
  .mobile-menu-btn{display:inline-flex}
}
/* hero */
.hero{padding:22px 0 10px}
.hero h1{font-size:clamp(1.6rem,4vw,2.3rem);line-height:1.15;margin:6px 0 8px;letter-spacing:-.02em}
.hero p.lead{color:var(--muted);font-size:1.05rem;max-width:720px;margin:0}
.hero-card{margin-top:16px}
/* layout */
.grid{display:grid;grid-template-columns:1.15fr .85fr;gap:18px}
@media(max-width:900px){.grid{grid-template-columns:1fr}}
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow)}
.card-pad{padding:16px}
.card h2,.card h3{margin:0 0 8px}
.section h2{font-size:1.35rem;margin:0 0 8px}
.muted{color:var(--muted)}
.small{font-size:.88rem}
.kbd{border:1px solid var(--border);border-bottom-width:2px;padding:1px 6px;border-radius:6px;background:var(--card);font-size:.85em}
/* calculator */
.calc-head{display:flex;flex-wrap:wrap;gap:10px;align-items:end;justify-content:space-between;margin-bottom:12px}
.field{display:flex;flex-direction:column;gap:6px}
.field label{font-weight:700;font-size:.9rem}
.field select,.field input,.field textarea{padding:10px 12px;border:1px solid var(--border);border-radius:10px;background:var(--bg);color:var(--text);font-size:1rem;width:100%}
.field select:focus,.field input:focus,.field textarea:focus{outline:2px solid var(--primary);outline-offset:1px;border-color:var(--primary)}
.controls{display:grid;grid-template-columns:1fr 1fr;gap:10px}
@media(max-width:600px){.controls{grid-template-columns:1fr}}
.toggle{display:flex;background:var(--bg);border:1px solid var(--border);border-radius:10px;padding:3px;gap:3px}
.toggle button{flex:1;padding:8px;border-radius:8px;border:0;background:transparent;font-weight:700;cursor:pointer;color:var(--muted)}
.toggle button.active{background:var(--card);color:var(--text);box-shadow:0 1px 3px rgba(0,0,0,.1);border:1px solid var(--border)}
.table-wrap{overflow:auto;border:1px solid var(--border);border-radius:10px}
table{width:100%;border-collapse:collapse;font-size:.95rem}
th,td{padding:10px 8px;text-align:left;border-bottom:1px solid var(--border)}
th{background:var(--bg);font-size:.82rem;text-transform:uppercase;letter-spacing:.04em;color:var(--muted);white-space:nowrap}
td input{width:100%;min-width:90px;padding:8px 10px;border:1px solid var(--border);border-radius:8px;background:var(--bg);color:var(--text);font-size:.95rem}
td input:focus{outline:2px solid var(--primary)}
.row-num{color:var(--muted);font-weight:700;text-align:center}
.actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}
.result-card{border:2px solid var(--primary);background:linear-gradient(180deg,var(--primary-light),var(--card))}
.result-top{display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between}
.cgpa-big{font-size:2.6rem;font-weight:900;letter-spacing:-.03em;line-height:1}
.cgpa-sub{color:var(--muted);font-size:.9rem}
.breakdown{margin-top:12px}
.badge-row{display:flex;gap:8px;flex-wrap:wrap;margin-top:8px}
.alert{padding:10px 12px;border-radius:10px;border:1px solid var(--border);background:var(--bg);margin-top:10px}
.alert-error{border-color:#fecaca;background:#fef2f2;color:#991b1b}
html[data-theme="dark"] .alert-error{background:#450a0a}
.alert-success{border-color:#a7f3d0;background:#ecfdf5;color:#065f46}
.helper{margin-top:12px;padding:12px;border:1px dashed var(--border);border-radius:10px;background:var(--bg)}
.helper h4{margin:0 0 8px}
.formula-box{background:var(--bg);border:1px solid var(--border);border-radius:10px;padding:12px;font-family:ui-monospace,Menlo,monospace;font-size:.92rem;overflow:auto}
/* content */
.content{max-width:760px}
.content p{margin:8px 0}
.content ul,.content ol{padding-left:22px}
.content li{margin:6px 0}
.faq details{border:1px solid var(--border);border-radius:10px;padding:10px 12px;background:var(--card);margin:8px 0}
.faq summary{font-weight:700;cursor:pointer}
.breadcrumbs{font-size:.88rem;color:var(--muted);margin:10px 0}
.breadcrumbs a{color:var(--muted)}
.toc{display:flex;flex-wrap:wrap;gap:8px;margin:10px 0}
.toc a{padding:6px 10px;background:var(--card);border:1px solid var(--border);border-radius:999px;font-size:.85rem}
.related{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px;margin-top:12px}
.related a{padding:12px;border:1px solid var(--border);border-radius:10px;background:var(--card);display:block}
.related a:hover{border-color:var(--primary);text-decoration:none}
.last-reviewed{font-size:.85rem;color:var(--muted);border-top:1px solid var(--border);padding-top:10px;margin-top:14px}
/* footer */
footer.site-footer{margin-top:24px;background:var(--card);border-top:1px solid var(--border);padding:18px 0}
.footer-grid{display:grid;grid-template-columns:1.2fr .8fr .8fr;gap:16px}
@media(max-width:700px){.footer-grid{grid-template-columns:1fr}}
.footer-grid h4{margin:0 0 8px}
.footer-links{list-style:none;padding:0;margin:0}
.footer-links li{margin:6px 0}
.made{ text-align:center; margin-top:14px; padding-top:12px; border-top:1px solid var(--border); font-weight:700}
.disclaimer{font-size:.82rem;color:var(--muted);margin-top:8px;text-align:center}
/* animation overlay */
#animOverlay{position:fixed;inset:0;pointer-events:none;opacity:0;visibility:hidden;overflow:hidden;z-index:100;background:transparent}
#animOverlay.active{opacity:1;visibility:visible;pointer-events:none}
#animOverlay .confetti{position:absolute;width:10px;height:14px;opacity:.95;will-change:transform,opacity;transform:translate3d(0,0,0)}
#animOverlay .cap{position:absolute;font-size:22px;will-change:transform,opacity}
@media(prefers-reduced-motion:reduce){
  #animOverlay.active{transition:opacity .15s}
}
/* print */
@media print{
  header.site-header,footer.site-footer,.actions,.helper,.controls,.toggle{display:none}
  .card{box-shadow:none}
}
/* focus */
:focus-visible{outline:2px solid var(--primary);outline-offset:2px}
/* utility */
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.hidden{display:none !important}
.divider{height:1px;background:var(--border);margin:12px 0}
.chip{padding:4px 8px;border:1px solid var(--border);border-radius:999px;font-size:.8rem;background:var(--bg)}

/* Article figures (guide page) */
.content figure{margin:18px 0}
.content figure img{width:100%;height:auto;display:block;border-radius:12px;border:1px solid var(--border)}
.content figcaption{font-size:.85rem;color:var(--muted);text-align:center;margin-top:8px}

/* ============================================================
   RESPONSIVE HARDENING — phones first, then tablets/desktop
   Breakpoints: 380 / 480 / 640 / 860 / 900
   ============================================================ */
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
body{overflow-x:clip}
img,svg,video{max-width:100%}
button,input,select,textarea{font:inherit}
.btn,nav.main-nav a,summary{-webkit-tap-highlight-color:transparent}
main .card,main section{min-width:0}
.content a,.footer-grid a,.breadcrumbs,.formula-box{overflow-wrap:anywhere}
.breadcrumbs{line-height:1.5}
section[id],#resultCard{scroll-margin-top:132px}

/* Brand can shrink instead of pushing the header buttons off-screen */
.brand{min-width:0;line-height:1.15}
.header-actions{flex:0 0 auto}

/* Desktop/tablet: 14 nav links scroll in ONE row instead of wrapping
   into a tall sticky header */
@media(min-width:861px){
  nav.main-nav{flex-wrap:nowrap;overflow-x:auto;overflow-y:hidden;padding-block:2px 8px;scrollbar-width:none;-webkit-overflow-scrolling:touch}
  nav.main-nav::-webkit-scrollbar{display:none}
  nav.main-nav a{flex:0 0 auto;white-space:nowrap}
}

/* Reading column stays centred on wide screens */
.content{width:100%;margin-inline:auto}

/* Predictable grids at every width (min() stops 220px tracks overflowing tiny screens) */
.related{grid-template-columns:repeat(auto-fit,minmax(min(100%,220px),1fr))}

/* ---- <= 900px: tablets ---- */
@media(max-width:900px){
  .container{padding-left:max(14px,env(safe-area-inset-left));padding-right:max(14px,env(safe-area-inset-right))}
  .hero{padding-top:18px}
}

/* ---- <= 860px: collapsed navigation ---- */
@media(max-width:860px){
  nav.main-nav.open{max-height:min(68dvh,560px);overflow-y:auto;overscroll-behavior:contain;gap:2px}
  nav.main-nav.open a{display:flex;align-items:center;min-height:44px;padding:10px 12px}
  .header-row{gap:8px}
}

/* ---- <= 640px: phones ---- */
@media(max-width:640px){
  .container{padding-left:max(12px,env(safe-area-inset-left));padding-right:max(12px,env(safe-area-inset-right))}
  .card-pad{padding:14px}
  .hero{padding:16px 0 8px}
  .hero h1{font-size:clamp(1.45rem,7.2vw,2rem)}
  .hero p.lead{font-size:.98rem}
  .section h2{font-size:1.22rem}
  .brand{font-size:1rem;gap:6px}
  .brand svg{width:24px;height:24px}
  .badge{white-space:normal;line-height:1.35}
  .calc-head{align-items:flex-start}
  /* 44px+ touch targets, no iOS focus zoom (inputs stay at 16px) */
  .btn{min-height:44px;justify-content:center}
  .btn-sm{min-height:40px}
  .field select,.field input,.field textarea{font-size:1rem;min-height:48px}
  td input{font-size:1rem;min-height:44px;min-width:0;padding:8px}
  /* Mode toggle: equal halves, balanced wrapping, equal heights */
  .toggle button{font-size:.84rem;line-height:1.3;padding:8px 6px;min-height:48px}
  /* Action rows: primary action full-width and first, rest share a row */
  .actions{align-items:stretch}
  .actions .btn,.actions a.btn{flex:1 1 9rem;white-space:normal;text-align:center}
  .actions .btn-primary{flex:1 1 100%;order:-1;min-height:48px}
  .actions .small{flex:1 1 100%}
  /* Result card stacks; copy/share/print share one row */
  .result-top{flex-direction:column;align-items:stretch}
  .result-top>div:last-child{width:100%}
  .result-top .btn{flex:1 1 30%}
  .cgpa-big{font-size:clamp(2.1rem,13vw,2.6rem)}
  /* Tables: compact, headers may wrap, first column sticks while scrolling */
  .table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;overscroll-behavior-x:contain}
  th,td{padding:8px 6px;font-size:.9rem}
  th{white-space:normal;line-height:1.3}
  .semesters-table table{table-layout:fixed}
  .semesters-table th:nth-child(1),.semesters-table td:nth-child(1){width:2.1rem}
  .semesters-table th:nth-child(4),.semesters-table td:nth-child(4){width:2.9rem}
  .semesters-table td:last-child .btn{min-width:44px;padding:6px 8px}
  .breakdown-table table{min-width:26rem}
  .breakdown-table th:first-child,.breakdown-table td:first-child{position:sticky;left:0;background:var(--card);z-index:1}
  .breakdown-table th:first-child{background:var(--bg)}
  .formula-box{font-size:.82rem;padding:10px;line-height:1.55}
  .helper{padding:10px}
  .faq summary{min-height:44px;display:flex;align-items:center}
  .faq details{padding:8px 10px}
  .content figure{margin:14px 0}
  footer.site-footer{padding-bottom:max(18px,env(safe-area-inset-bottom))}
}

/* ---- <= 560px: SGPA subject rows stack into cards (no sideways scroll) ---- */
@media(max-width:560px){
  .subjects-table{overflow:visible}
  .subjects-table table,.subjects-table tbody{display:block;width:100%}
  .subjects-table thead{display:none}
  .subjects-table tr{display:grid;grid-template-columns:2rem minmax(0,1fr) 2.75rem;grid-template-areas:"num name remove" "num gp credits";gap:.5rem;padding:.65rem;border-bottom:1px solid var(--border);align-items:start}
  .subjects-table tr:last-child{border-bottom:0}
  .subjects-table td{display:block;border:0;padding:0;min-width:0}
  .subjects-table td:nth-child(1){grid-area:num;padding-top:.6rem}
  .subjects-table td:nth-child(2){grid-area:name}
  .subjects-table td:nth-child(3){grid-area:gp}
  .subjects-table td:nth-child(4){grid-area:credits}
  .subjects-table td:nth-child(5){grid-area:remove}
  .subjects-table td input{width:100%}
  .subjects-table td:last-child .btn{width:44px;min-width:44px;padding:6px 8px}
}

/* ---- <= 480px: small phones ---- */
@media(max-width:480px){
  .header-row{flex-wrap:wrap;padding:8px 0}
  .brand{flex:1 1 10rem;font-size:.96rem}
  .header-actions{margin-left:auto}
  .header-actions .btn{padding:7px 9px;font-size:.82rem;min-height:40px}
  .controls{grid-template-columns:1fr}
  .result-top .btn{flex:1 1 8rem}
  .related{grid-template-columns:1fr}
  .footer-grid{gap:12px}
  .disclaimer,.made{padding-left:2px;padding-right:2px}
}

/* ---- <= 380px: very small phones ---- */
@media(max-width:380px){
  .card-pad{padding:12px}
  .hero h1{font-size:1.38rem}
  th,td{padding:7px 5px;font-size:.86rem}
  .toggle button{font-size:.8rem}
  .cgpa-big{font-size:2rem}
}

/* Landscape phones: opened menu never exceeds the visible screen */
@media(max-height:480px){
  nav.main-nav.open{max-height:62dvh}
}

/* ============================================================
   LIGHT / DARK THEME POLISH
   Explicit data-theme choices always win over the OS setting:
   Light works on dark-mode devices, Dark works on light ones.
   ============================================================ */
/* Smooth theme swap (disabled entirely for reduced-motion users) */
body,.card,header.site-header,footer.site-footer,input,select,textarea,th,td,.btn,.toggle,.toggle button,.faq details,.alert,.helper,.formula-box,.table-wrap,.related a{transition:background-color .18s ease,color .18s ease,border-color .18s ease}
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{transition:none !important}
}
/* Form controls inherit the theme (native dropdowns, scrollbars, checks) */
::placeholder{color:var(--muted);opacity:.75}
::selection{background:var(--primary);color:#fff}
input,select,textarea{color-scheme:inherit}

/* Dark variants for badges/alerts that were hard-coded light */
html[data-theme="dark"] .badge-warn{background:#451a03;border-color:#92400e;color:#fde68a}
html[data-theme="dark"] .badge-unverified{background:#450a0a;border-color:#7f1d1d;color:#fecaca}
html[data-theme="dark"] .alert-error{background:#450a0a;border-color:#7f1d1d;color:#fecaca}
html[data-theme="dark"] .alert-success{background:#022c22;border-color:#065f46;color:#a7f3d0}
@media(prefers-color-scheme:dark){
  :root:not([data-theme="light"]) .badge-warn{background:#451a03;border-color:#92400e;color:#fde68a}
  :root:not([data-theme="light"]) .badge-unverified{background:#450a0a;border-color:#7f1d1d;color:#fecaca}
  :root:not([data-theme="light"]) .alert-error{background:#450a0a;border-color:#7f1d1d;color:#fecaca}
  :root:not([data-theme="light"]) .alert-success{background:#022c22;border-color:#065f46;color:#a7f3d0}
}
/* Dark: sticky breakdown column and table headers stay on the card surface */
html[data-theme="dark"] .breakdown-table th:first-child{background:#232847}
html[data-theme="dark"] .breakdown-table td:first-child{background:var(--card)}
/* Dark: images sit on a deep frame instead of glaring white edges */
html[data-theme="dark"] .content figure img{border-color:var(--border)}
/* Toggle button state reads correctly in both themes */
#themeToggle[aria-pressed="true"]{background:var(--primary-light);border-color:var(--primary);color:var(--primary)}

/* Toggle / tap reliability: instant taps on mobile, clear affordance */
.btn,.toggle button,nav.main-nav a,#themeToggle{touch-action:manipulation;user-select:none;-webkit-user-select:none;cursor:pointer}
#themeToggle{position:relative;z-index:41;min-width:6.2rem}
#themeToggle:active{transform:translateY(1px)}

/* --- Theme polish: buttons, scrollbar, autofill, dark images --- */
:root{--primary-btn:#4f46e5;--primary-btn-hover:#4338ca;--scroll-thumb:#cbd5e1}
@media(prefers-color-scheme:dark){
  :root:not([data-theme="light"]){--scroll-thumb:#3b4070}
}
html[data-theme="dark"]{--scroll-thumb:#3b4070}
.btn-primary{background:var(--primary-btn);border-color:var(--primary-btn);color:#fff}
.btn-primary:hover{background:var(--primary-btn-hover);border-color:var(--primary-btn-hover)}
html{scrollbar-color:var(--scroll-thumb) var(--bg)}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:var(--bg)}
::-webkit-scrollbar-thumb{background:var(--scroll-thumb);border-radius:8px;border:2px solid var(--bg)}
input:-webkit-autofill,textarea:-webkit-autofill,select:-webkit-autofill{-webkit-text-fill-color:var(--text);-webkit-box-shadow:0 0 0 1000px var(--bg) inset;caret-color:var(--text);border-radius:10px}
@media(prefers-color-scheme:dark){
  :root:not([data-theme="light"]) .content img{filter:brightness(.94)}
}
html[data-theme="dark"] .content img{filter:brightness(.94)}

/* --- Full-screen calculating overlay + balloons --- */
#animOverlay{transition:opacity .18s ease}
#animOverlay.calculating{background:rgba(248,250,252,.93);backdrop-filter:blur(3px);pointer-events:all}
@media(prefers-color-scheme:dark){
  :root:not([data-theme="light"]) #animOverlay.calculating{background:rgba(15,18,32,.93)}
}
html[data-theme="dark"] #animOverlay.calculating{background:rgba(15,18,32,.93)}
#animOverlay.fading{opacity:0}
.calc-screen{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;padding:20px;text-align:center}
.calc-logo{width:84px;height:84px;border-radius:24px;background:linear-gradient(135deg,#6366f1,#4338ca);color:#fff;font-size:44px;font-weight:900;line-height:1;display:flex;align-items:center;justify-content:center;box-shadow:0 12px 30px rgba(79,70,229,.35);animation:calcPulse .45s ease-in-out infinite alternate}
@keyframes calcPulse{from{transform:scale(1) rotate(-2deg)}to{transform:scale(1.09) rotate(2deg)}}
.calc-text{font-size:1.25rem;font-weight:800;color:var(--text)}
.calc-bar{width:min(260px,70vw);height:8px;border-radius:99px;background:var(--border);overflow:hidden}
.calc-bar span{display:block;height:100%;width:100%;background:var(--primary);border-radius:99px;transform:scaleX(0);transform-origin:left}
.calc-pct{font-weight:800;color:var(--muted);font-variant-numeric:tabular-nums}
.balloon{position:absolute;width:44px;height:56px;border-radius:50% 50% 50% 50%/55% 55% 45% 45%;opacity:0;box-shadow:inset -8px -10px 0 rgba(0,0,0,.08)}
.balloon::before{content:"";position:absolute;left:50%;bottom:-5px;width:11px;height:11px;background:inherit;transform:translateX(-50%) rotate(45deg);border-radius:2px}
.balloon::after{content:"";position:absolute;left:50%;top:calc(100% + 8px);width:2px;height:52px;background:linear-gradient(rgba(100,116,139,.5),rgba(100,116,139,0))}
@media(prefers-reduced-motion:reduce){
  .calc-logo{animation:none}
}

/* ============================================================
   NAV & HEADER REFINEMENT — every link visible, every width
   ============================================================ */
/* Desktop/tablet: wrap into compact pill rows — nothing clipped off-edge */
@media(min-width:861px){
  nav.main-nav{flex-wrap:wrap;overflow:visible;padding-block:4px 10px;gap:5px}
  nav.main-nav a{font-size:.85rem;padding:6px 9px}
  section[id],#resultCard{scroll-margin-top:152px}
}
/* Mobile menu: two-column pill grid, big touch targets, panel feel */
@media(max-width:860px){
  nav.main-nav.open{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px;padding:10px 0 12px;align-items:stretch}
  nav.main-nav.open a{display:flex;align-items:center;min-height:44px;padding:8px 10px;border:1px solid var(--border);border-radius:10px;background:var(--bg);font-size:.88rem;line-height:1.25}
  nav.main-nav.open a.active{background:var(--primary-light)}
}
/* Small phones: header stays on ONE row (icon-only theme button) */
@media(max-width:640px){
  .brand img{width:24px;height:24px}
}
@media(max-width:480px){
  .header-row{flex-wrap:nowrap;padding:8px 0;gap:8px}
  .brand{flex:1 1 auto;min-width:0;font-size:.96rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .header-actions{flex:0 0 auto;margin-left:0;gap:6px}
  .header-actions .btn{padding:7px 9px;font-size:.82rem;min-height:40px}
  #themeToggle{min-width:44px;justify-content:center;padding:7px 8px}
  #themeToggle .theme-label{display:none}
}

/* Searchable university select (combobox) */
.combo{position:relative}
.combo-native{display:none!important}
.combo-btn{width:100%;text-align:left;padding:10px 36px 10px 12px;border:1px solid var(--border);border-radius:10px;background:var(--bg);color:var(--text);font-size:1rem;min-height:48px;cursor:pointer;position:relative}
.combo-btn::after{content:"\u25BE";position:absolute;right:12px;top:50%;transform:translateY(-50%);opacity:.65;font-size:.85rem}
.combo-btn:focus-visible{outline:2px solid var(--primary);outline-offset:1px}
.combo-panel{position:absolute;z-index:90;top:calc(100% + 6px);left:0;right:0;background:var(--bg);border:1px solid var(--border);border-radius:12px;box-shadow:0 18px 44px rgba(2,6,23,.28);padding:8px}
.combo-panel input{width:100%;padding:10px 12px;border:1px solid var(--border);border-radius:10px;background:var(--bg);color:var(--text);font-size:1rem;margin-bottom:6px}
.combo-panel input:focus{outline:2px solid var(--primary);outline-offset:1px}
.combo-list{max-height:min(300px,52vh);overflow:auto}
.combo-item{display:block;width:100%;text-align:left;padding:10px;border:0;border-radius:8px;background:transparent;color:var(--text);cursor:pointer;font-size:.97rem}
.combo-item:hover,.combo-item.active{background:var(--primary);color:#fff}
.combo-item .combo-hint{display:block;font-size:.8rem;opacity:.78;margin-top:2px}
.combo-item.is-other{border-top:1px dashed var(--border);margin-top:4px;font-weight:600}
.combo-empty{padding:10px;font-size:.92rem;opacity:.85}

/* SGPA trajectory rows */
.traj-row{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-bottom:8px}
@media(max-width:560px){.traj-row{grid-template-columns:1fr}}
/* Printable result card (converter pages) */
#printCard{display:none}
#printCard .pc-brand{letter-spacing:.08em;text-transform:uppercase;font-size:.72rem;color:#555}
#printCard .pc-big{font-size:1.7rem;font-weight:700;margin:10px 0}
#printCard .pc-disclaimer{border:1px solid #999;padding:10px;margin-top:16px;font-size:.85rem}
#printCard p{margin:6px 0}
@media print{
  body.printing>*:not(#printCard){display:none!important}
  body.printing #printCard{display:block!important;color:#000;background:#fff;padding:24px;font-family:Georgia,'Times New Roman',serif}
}

.dir-search{max-width:560px;margin:16px 0 4px}
.dir-search label{display:block;margin-bottom:6px}

/* ============================================================
   DESKTOP MARGIN FIX (>= 901px)
   Consistent side gutters, breathing room between content boxes,
   aligned reading column, roomier card padding.
   ============================================================ */
@media(min-width:901px){
  /* proper side gutters so boxes never touch the page edge */
  .container{padding-left:32px;padding-right:32px}

  /* hero spacing */
  .hero{padding:40px 0 20px}
  .hero h1{margin:10px 0 12px}
  .hero-card{margin-top:28px}

  /* vertical rhythm between content boxes/sections */
  .section{padding:32px 0}
  .section h2{margin:0 0 14px}
  main .card + .card,
  main .card + .section,
  main .section + .card{margin-top:24px}
  .grid{gap:28px;margin-bottom:8px}

  /* roomier card interiors */
  .card-pad{padding:28px 30px}
  .card h2,.card h3{margin:0 0 12px}
  .helper{margin-top:20px;padding:18px 20px}
  .alert{margin-top:16px}
  .actions{margin-top:20px}
  .calc-head{margin-bottom:20px}
  .controls{gap:16px}
  .breakdown{margin-top:20px}

  /* reading column: align to the left edge of its box, same as headings */
  .content{max-width:820px;margin-inline:0}
  .content p{margin:12px 0}
  .content ul,.content ol{margin:12px 0}
  .content figure{margin:26px 0}

  /* grids of link/related boxes */
  .related{gap:18px;margin-top:20px}
  .related a{padding:16px 18px}

  /* FAQ / breadcrumbs / toc */
  .faq details{margin:12px 0;padding:14px 18px}
  .breadcrumbs{margin:18px 0 8px}
  .toc{margin:16px 0;gap:10px}

  /* footer */
  footer.site-footer{margin-top:48px;padding:36px 0 28px}
  .footer-grid{gap:32px}
  .made{margin-top:24px;padding-top:18px}
}

/* very wide monitors: slightly wider shell, same gutters */
@media(min-width:1400px){
  :root{--max:1200px}
}