/* ============================================================
   New Tool Site (this chat) — Design System v1 DARK
   Dark experiment 2026-11-08 (user: "dark krna wo dekhty hain").
   Light version backed up at workspace/backups-new-tool-site/style-light-2026-11-08.css
   Primary Indigo #6366F1 | Accent Cyan #22D3EE
   Headings #F8FAFC | Body #CBD5E1 | Muted #94A3B8
   Background #0F172A / #1E293B | Border #334155
   Fonts: Plus Jakarta Sans (headings) / Inter (body)
          system monospace (tool output)
   Live on gwacalculator.uk — dark theme, GWA tools.
   ============================================================ */
:root{
  --primary:#6366F1; --primary-dark:#818CF8; --primary-light:#1E1B4B;
  --accent:#22D3EE; --accent-light:#164E63;
  --slate-900:#F8FAFC; --slate-600:#CBD5E1; --slate-400:#94A3B8;
  --bg:#0F172A; --bg-alt:#1E293B; --border:#334155; color-scheme:dark;
  --success:#34D399; --warning:#FBBF24; --danger:#F87171;
  --radius:16px; --radius-sm:10px;
  --shadow-sm:0 1px 3px rgba(0,0,0,.4),0 1px 2px rgba(0,0,0,.3);
  --shadow-md:0 10px 30px rgba(0,0,0,.45);
  --shadow-lg:0 20px 45px rgba(99,102,241,.25);
  --font-head:'Plus Jakarta Sans',system-ui,sans-serif;
  --font-body:'Inter',system-ui,sans-serif;
  --font-mono:ui-monospace,'SF Mono','Cascadia Mono',Menlo,Consolas,monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font-body);color:var(--slate-600);background:var(--bg);font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased}
h1,h2,h3,h4,h5{font-family:var(--font-head);color:var(--slate-900);line-height:1.2;letter-spacing:-.02em}
a{color:var(--primary-dark);text-decoration:none}
a:hover{color:#A5B4FC}
::selection{background:var(--primary);color:#fff}

/* Header */
.site-header{position:sticky;top:0;z-index:1000;background:rgba(15,23,42,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}
.navbar-brand{font-family:var(--font-head);font-weight:800;font-size:1.35rem;color:var(--slate-900)!important;letter-spacing:-.03em}
.navbar-brand .logo-mark{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:11px;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;font-size:1.1rem;margin-right:.5rem;box-shadow:var(--shadow-sm)}
.navbar-brand .logo-mark i{font-style:normal}
.navbar-toggler{border-color:var(--border)}
.navbar-toggler-icon{filter:invert(1)}
.nav-link{font-weight:600;color:var(--slate-900)!important;font-size:.95rem;padding:.5rem .85rem!important;border-radius:8px}
.nav-link:hover,.nav-link.active{background:var(--primary-light);color:#A5B4FC!important}

/* Buttons */
.btn{font-weight:700;border-radius:10px;padding:.7rem 1.4rem;font-size:.95rem;transition:all .2s ease}
.btn-primary{background:var(--primary);border-color:var(--primary);box-shadow:0 8px 20px rgba(99,102,241,.35);color:#fff}
.btn-primary:hover{background:var(--primary-dark);border-color:var(--primary-dark);transform:translateY(-1px);box-shadow:0 12px 26px rgba(99,102,241,.4);color:#fff}
.btn-outline{border:1.5px solid #475569;color:var(--slate-900);background:transparent}
.btn-outline:hover{border-color:var(--primary);color:#A5B4FC;background:var(--primary-light)}
.btn-lg{padding:.9rem 1.8rem;font-size:1.05rem}

/* Hero */
.hero{padding:5.5rem 0 4rem;background:radial-gradient(900px 400px at 85% -10%,#164E63 0%,transparent 60%),radial-gradient(700px 350px at 5% 0%,var(--primary-light) 0%,transparent 55%),var(--bg);position:relative;overflow:hidden}
.hero-badge{display:inline-flex;align-items:center;gap:.5rem;background:var(--bg-alt);border:1px solid var(--border);border-radius:999px;padding:.4rem .9rem;font-size:.85rem;font-weight:700;color:#A5B4FC;box-shadow:var(--shadow-sm)}
.hero-badge .dot{width:8px;height:8px;border-radius:50%;background:var(--success);box-shadow:0 0 0 4px rgba(52,211,153,.15)}
.hero h1{font-size:clamp(2.4rem,5vw,3.6rem);font-weight:800;margin:1.25rem 0 1rem}
.hero h1 .grad{background:linear-gradient(90deg,#818CF8,var(--accent));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.lead{font-size:1.15rem;max-width:640px}
.hero-search{max-width:640px;background:var(--bg-alt);border:1px solid var(--border);border-radius:16px;padding:.5rem;box-shadow:var(--shadow-md);display:flex;gap:.5rem}
.hero-search input{border:0;flex:1;padding:.6rem .8rem;font-size:1rem;outline:none;min-width:0;background:transparent;color:var(--slate-900)}
.hero-search input::placeholder{color:var(--slate-400)}
.hero-search input:focus{box-shadow:none}
.hero-search .btn{flex-shrink:0}
.hero-stats{display:flex;gap:2rem;flex-wrap:wrap;margin-top:2rem}
.hero-stats b{display:block;font-family:var(--font-head);font-size:1.5rem;color:var(--slate-900)}
.hero-stats span{font-size:.88rem;color:var(--slate-400);font-weight:600}
.hero-visual{background:var(--bg-alt);border:1px solid var(--border);border-radius:20px;box-shadow:var(--shadow-lg);padding:1.25rem}
.hero-visual .tool-mock{border:1px solid var(--border);border-radius:12px;overflow:hidden}
.hero-visual .mock-head{background:var(--bg);padding:.7rem 1rem;display:flex;gap:.4rem;align-items:center;font-weight:700;font-size:.85rem;color:var(--slate-900)}
.hero-visual .mock-head i{width:10px;height:10px;border-radius:50%;display:inline-block}
.hero-visual .mock-body{padding:1rem}
.mock-input{background:var(--bg);border:1px dashed #475569;border-radius:10px;padding:.9rem;color:var(--slate-400);font-size:.9rem}
.mock-output{background:var(--primary-light);border-radius:10px;padding:.9rem;font-family:var(--font-mono);font-size:.85rem;color:#C7D2FE;margin-top:.75rem}

/* Sections */
.section{padding:4.5rem 0}
.section-alt{background:#0B1220}
.section-head{max-width:680px;margin:0 auto 2.5rem;text-align:center}
.section-head .eyebrow{text-transform:uppercase;letter-spacing:.12em;font-size:.78rem;font-weight:800;color:#A5B4FC}
.section-head h2{font-size:clamp(1.7rem,3.5vw,2.3rem);font-weight:800;margin:.6rem 0 .7rem}
.section-head p{font-size:1.05rem}

/* Tool / category cards */
.tool-card{background:var(--bg-alt);border:1px solid var(--border);border-radius:var(--radius);padding:1.6rem;height:100%;transition:all .22s ease;position:relative}
.tool-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--primary)}
.tool-icon{width:52px;height:52px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:1.45rem;margin-bottom:1rem}
.tool-icon.indigo{background:var(--primary-light);color:#A5B4FC}
.tool-icon.cyan{background:var(--accent-light);color:#67E8F9}
.tool-icon.green{background:#064E3B;color:#6EE7B7}
.tool-icon.amber{background:#451A03;color:#FCD34D}
.tool-card h3{font-size:1.15rem;font-weight:700;margin-bottom:.4rem}
.tool-card p{font-size:.95rem;margin-bottom:1rem}
.tool-card .card-link{font-weight:700;font-size:.92rem}
.placeholder-tag{position:absolute;top:1rem;right:1rem;font-size:.68rem;font-weight:800;letter-spacing:.06em;text-transform:uppercase;background:var(--bg);border:1px solid var(--border);color:var(--slate-400);border-radius:999px;padding:.25rem .6rem}

/* Feature / steps */
.step-num{width:44px;height:44px;border-radius:50%;background:var(--primary);color:#fff;font-family:var(--font-head);font-weight:800;display:flex;align-items:center;justify-content:center;font-size:1.1rem;box-shadow:0 8px 18px rgba(99,102,241,.35)}
.feature-box{background:var(--bg-alt);border:1px solid var(--border);border-radius:var(--radius);padding:1.8rem;height:100%}
.feature-box h3{font-size:1.1rem}

/* FAQ */
.accordion-item{border:1px solid var(--border)!important;border-radius:12px!important;overflow:hidden;margin-bottom:.75rem;background:var(--bg-alt)}
.accordion-button{font-family:var(--font-head);font-weight:700;color:var(--slate-900);background:var(--bg-alt);box-shadow:none!important}
.accordion-button::after{filter:invert(1)}
.accordion-button:not(.collapsed){background:var(--primary-light);color:#A5B4FC}
.accordion-body{background:var(--bg-alt);color:var(--slate-600)}

/* CTA band — DARK */
.cta-band{background:linear-gradient(135deg,var(--primary-light),var(--accent-light));border:1px solid #3730A3;border-radius:24px;padding:3rem;color:var(--slate-900);position:relative;overflow:hidden}
.cta-band:after{content:"";position:absolute;width:320px;height:320px;border-radius:50%;background:rgba(34,211,238,.18);filter:blur(60px);right:-80px;top:-80px}
.cta-band h2{color:var(--slate-900);font-size:clamp(1.6rem,3vw,2.2rem)}
.cta-band p{color:var(--slate-600)}

/* Footer — DARK */
.site-footer{background:#0B1220;color:var(--slate-400);padding:3.5rem 0 1.5rem;margin-top:0;border-top:1px solid var(--border)}
.site-footer h5{color:var(--slate-900);font-size:1rem;margin-bottom:1rem}
.site-footer a{color:var(--slate-400);display:block;padding:.25rem 0;font-size:.95rem}
.site-footer a:hover{color:#A5B4FC}
.site-footer .footer-brand{color:var(--slate-900);font-family:var(--font-head);font-weight:800;font-size:1.3rem}
.footer-bottom{border-top:1px solid var(--border);margin-top:2.5rem;padding-top:1.25rem;font-size:.88rem}

/* Forms */
.form-control,.form-select{border-radius:10px;padding:.75rem 1rem;border:1.5px solid var(--border);font-size:1rem;background:var(--bg-alt);color:var(--slate-900)}
.form-control:focus,.form-select:focus{border-color:var(--primary);box-shadow:0 0 0 4px rgba(99,102,241,.25);background:var(--bg-alt);color:var(--slate-900)}
.form-label{font-weight:700;color:var(--slate-900);font-size:.92rem}
code{font-family:var(--font-mono);color:#C7D2FE;background:var(--primary-light);padding:.15rem .4rem;border-radius:6px}

/* Responsive */
@media(max-width:991px){
  .hero{padding:3.5rem 0 2.5rem}
  .hero-visual{margin-top:2rem}
  .section{padding:3rem 0}
}
@media(max-width:575px){
  .hero-search{flex-direction:column}
  .hero-search .btn{width:100%}
  .hero-stats{gap:1.25rem}
  .cta-band{padding:2rem 1.25rem}
}

/* Labelled ad placeholder (no ads loaded until AdSense approval) */
.ad-slot{border:1px dashed #475569;border-radius:var(--radius-sm);background:var(--bg-alt);color:var(--slate-400);text-align:center;padding:1.25rem;font-size:.75rem;letter-spacing:.12em;text-transform:uppercase}

/* Long footer email must wrap inside its narrow column, not overlap neighbours */
.footer-email{font-size:.82rem;word-break:break-all}

/* ===== GWA tools — mature design system (dark) v2, 2026-11-08 =====
   Designer rules: labelled fields, not placeholder-only; one clear
   primary action; inset dark inputs (never white on dark); a result
   that reads as a verdict, not a plain number. color-scheme: dark
   stops browsers painting native controls white. */
html{color-scheme:dark}
input,select,textarea{color-scheme:dark}

/* --- Calculator card --- */
.calc-card{background:var(--bg-alt);border:1px solid var(--border);border-radius:20px;padding:1.75rem;box-shadow:var(--shadow-lg)}
.tool-head{display:flex;gap:.9rem;align-items:flex-start;margin-bottom:1.25rem}
.tool-head .tool-ico{flex:0 0 46px;width:46px;height:46px;border-radius:13px;display:flex;align-items:center;justify-content:center;font-size:1.35rem;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;box-shadow:0 8px 18px rgba(99,102,241,.35)}
.tool-head h2{font-size:1.3rem;margin:0 0 .15rem}
.tool-head p{margin:0;font-size:.92rem;color:var(--slate-400)}
.tool-head .pill{margin-left:auto;flex-shrink:0;font-size:.72rem;font-weight:800;letter-spacing:.06em;text-transform:uppercase;color:#A5B4FC;background:var(--primary-light);border:1px solid #3730A3;border-radius:999px;padding:.35rem .7rem;white-space:nowrap}

/* --- Column header row (desktop) --- */
.grid-head{display:grid;grid-template-columns:minmax(0,1fr) 132px 158px 40px;gap:10px;padding:0 .25rem .55rem;font-size:.72rem;font-weight:800;letter-spacing:.1em;text-transform:uppercase;color:var(--slate-400)}
.grid-head span:nth-child(2),.grid-head span:nth-child(3){text-align:left}

/* --- Subject rows: one subtle card per subject --- */
.subject-row{display:grid;grid-template-columns:minmax(0,1fr) 132px 158px 40px;gap:10px;align-items:center;background:var(--bg);border:1px solid var(--border);border-radius:14px;padding:10px 12px;margin-bottom:10px;transition:border-color .15s ease}
.subject-row:focus-within{border-color:var(--primary);box-shadow:0 0 0 3px rgba(99,102,241,.18)}
.fld{min-width:0}
.fld-label{display:none;font-size:.68rem;font-weight:800;letter-spacing:.09em;text-transform:uppercase;color:var(--slate-400);margin-bottom:.35rem}
.subject-row input,.subject-row select{width:100%;background-color:#0B1220;background-clip:padding-box;border:1.5px solid var(--border);border-radius:10px;color:#F1F5F9;padding:.68rem .8rem;font-size:.96rem;font-family:var(--font-body);outline:none;transition:border-color .15s ease,box-shadow .15s ease}
.subject-row input::placeholder{color:#64748B}
.subject-row input:focus,.subject-row select:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(99,102,241,.25)}
.subject-row select{appearance:none;-webkit-appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2394A3B8' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right .8rem center;padding-right:2.3rem;cursor:pointer}
.subject-row select option{background:#0B1220;color:#F1F5F9}
input[type=number]::-webkit-outer-spin-button,input[type=number]::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}
input[type=number]{-moz-appearance:textfield;appearance:textfield}

/* Units stepper: − value + */
.stepper{display:flex;align-items:stretch;background-color:#0B1220;border:1.5px solid var(--border);border-radius:10px;overflow:hidden}
.stepper:focus-within{border-color:var(--primary);box-shadow:0 0 0 3px rgba(99,102,241,.25)}
.step-btn{flex:0 0 34px;border:0;background:transparent;color:#94A3B8;font-size:1.15rem;line-height:1;cursor:pointer;font-family:var(--font-body)}
.step-btn:hover{color:#fff;background:rgba(255,255,255,.07)}
.stepper input{flex:1;min-width:0;border:0!important;border-radius:0!important;background:transparent!important;text-align:center;padding:.68rem 0;box-shadow:none!important}
.stepper input:focus{box-shadow:none!important}

/* Remove button: quiet until hovered */
.btn-remove{background:transparent;border:1px solid transparent;color:#64748B;border-radius:9px;width:40px;height:40px;font-size:1.25rem;line-height:1;cursor:pointer;transition:all .15s ease}
.btn-remove:hover{border-color:rgba(248,113,113,.4);color:#F87171;background:rgba(248,113,113,.08)}

/* Actions: one primary, one quiet */
.calc-actions{display:flex;gap:.7rem;margin-top:.9rem}
.calc-actions .btn{flex:1}
.btn-add{display:block;width:100%;background:transparent;border:1.5px dashed #475569;color:#CBD5E1;border-radius:12px;padding:.75rem;font-weight:700;font-size:.95rem;cursor:pointer;transition:all .15s ease;margin-top:.35rem}
.btn-add:hover{border-color:var(--primary);color:#A5B4FC;background:rgba(99,102,241,.08)}
.btn-calc{padding:.85rem 1.4rem!important;font-size:1.02rem!important}
.btn-ghost{background:transparent!important;border:1.5px solid var(--border)!important;color:#CBD5E1!important;box-shadow:none!important}
.btn-ghost:hover{border-color:var(--primary)!important;color:#A5B4FC!important;background:rgba(99,102,241,.08)!important}
.calc-note{margin-top:1rem;font-size:.86rem;color:var(--slate-400)}
.calc-note strong{color:var(--slate-600)}

/* --- Result: a verdict, not a number --- */
.result-box{display:none;background:linear-gradient(180deg,#17153A,#12102E);border:1px solid #3730A3;border-radius:16px;padding:1.4rem 1.5rem;margin-top:1.25rem}
.result-box.show{display:block;animation:rise .25s ease}
@keyframes rise{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}
.result-top{display:flex;gap:1.25rem;align-items:center;flex-wrap:wrap}
.result-big{font-family:var(--font-head);font-size:3rem;font-weight:800;line-height:1;background:linear-gradient(90deg,#A5B4FC,#67E8F9);-webkit-background-clip:text;background-clip:text;color:transparent}
.result-meta{min-width:0}
.result-badge{display:inline-block;font-size:.75rem;font-weight:800;letter-spacing:.04em;border-radius:999px;padding:.32rem .75rem;margin-bottom:.4rem}
.result-badge.good{color:#6EE7B7;background:rgba(16,185,129,.14);border:1px solid rgba(16,185,129,.35)}
.result-badge.ok{color:#FCD34D;background:rgba(245,158,11,.12);border:1px solid rgba(245,158,11,.35)}
.result-badge.warn{color:#FDA4AF;background:rgba(239,68,68,.12);border:1px solid rgba(239,68,68,.35)}
.result-meta p{margin:0;font-size:.95rem}
.result-stats{display:flex;gap:1.6rem;flex-wrap:wrap;margin-top:1rem;padding-top:1rem;border-top:1px solid rgba(255,255,255,.08)}
.result-stats .stat b{display:block;font-family:var(--font-head);font-size:1.15rem;color:#F8FAFC}
.result-stats .stat span{font-size:.78rem;color:var(--slate-400);font-weight:600}
.scale{position:relative;height:8px;border-radius:999px;background:linear-gradient(90deg,#6366F1,#22D3EE 38%,#FBBF24 68%,#F87171);margin:1.15rem 0 .45rem}
.scale-marker{position:absolute;top:50%;width:20px;height:20px;border-radius:50%;background:#fff;border:4px solid #6366F1;transform:translate(-50%,-50%);box-shadow:0 2px 10px rgba(0,0,0,.5)}
.scale-labels{display:flex;justify-content:space-between;font-size:.76rem;color:var(--slate-400);font-weight:600}
.result-note{margin-top:.85rem;font-size:.9rem;color:var(--slate-600)}
.result-note:empty{display:none}

/* --- Single-input converters (equivalents / honors / GPA) --- */
.single-input{display:flex;gap:.65rem}
.single-input input{flex:1;min-width:0;background-color:#0B1220;border:1.5px solid var(--border);border-radius:12px;color:#F1F5F9;padding:.85rem 1rem;font-size:1.05rem;font-family:var(--font-body);outline:none}
.single-input input::placeholder{color:#64748B}
.single-input input:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(99,102,241,.25)}
.single-input .btn{flex-shrink:0}

/* --- Segmented scale picker (university page) --- */
.seg{display:inline-flex;background:var(--bg);border:1px solid var(--border);border-radius:12px;padding:4px;gap:4px;margin-bottom:1rem;flex-wrap:wrap}
.seg button{padding:.55rem .95rem;border-radius:8px;border:0;background:transparent;color:var(--slate-400);font-weight:700;font-size:.9rem;cursor:pointer;font-family:var(--font-body)}
.seg button.active{background:var(--primary);color:#fff;box-shadow:0 4px 12px rgba(99,102,241,.35)}
.seg button:not(.active):hover{color:#F1F5F9}

/* --- Mini hero / content (kept from v1, dark) --- */
.mini-hero{padding:3.5rem 0 2rem;background:radial-gradient(700px 300px at 85% -10%,#164E63 0%,transparent 60%),radial-gradient(600px 300px at 5% 0%,var(--primary-light) 0%,transparent 55%),var(--bg)}
.mini-hero h1{font-size:clamp(1.9rem,4vw,2.6rem);font-weight:800;margin:.75rem 0}
.mini-hero p.lead{font-size:1.05rem;max-width:720px}
.grade-table{width:100%;border-collapse:collapse;font-size:.95rem}
.grade-table th,.grade-table td{border:1px solid var(--border);padding:.6rem .75rem;text-align:left}
.grade-table th{background:var(--bg);color:var(--slate-900);font-family:var(--font-head)}
.grade-table tr:nth-child(even) td{background:rgba(255,255,255,.02)}
.content-block{max-width:780px}
.content-block h2{font-size:1.5rem;margin:2rem 0 .75rem}
.content-block h3{font-size:1.2rem;margin:1.5rem 0 .5rem}
.content-block p,.content-block li{font-size:1.02rem}
.content-block ul,.content-block ol{margin-bottom:1rem}
.formula-box{background:var(--bg-alt);border:1px solid var(--border);border-radius:12px;padding:1.1rem 1.25rem;font-family:var(--font-mono);font-size:1rem;color:#C7D2FE;text-align:center;margin:1.25rem 0}
.note-box{background:var(--bg);border:1px solid var(--border);border-left:4px solid var(--accent);border-radius:10px;padding:1rem 1.1rem;font-size:.93rem;margin:1.25rem 0}
.note-box strong{color:var(--slate-900)}
.related-grid .tool-card p{font-size:.9rem}

/* --- Responsive: rows become mini-cards with visible labels --- */
@media(max-width:767px){
  .calc-card{padding:1.25rem}
  .grid-head{display:none}
  .subject-row{grid-template-columns:1fr 1fr;gap:.7rem;padding:.9rem}
  .subject-row .fld:first-child{grid-column:1 / -1}
  .fld-label{display:block}
  .btn-remove{grid-column:2;justify-self:end;margin-top:-.4rem}
  .result-big{font-size:2.4rem}
  .tool-head .pill{display:none}
  .single-input{flex-direction:column}
  .single-input .btn{width:100%}
  .calc-actions{flex-direction:column}
}