/* ==========================================================================
   Professor Tech — M-Pesa payment links
   One stylesheet for every page. Sections, top to bottom:
   1. Design tokens (colors, spacing)   6. Badges, banners, alerts
   2. Base & typography                 7. Lists (transactions, links, tills)
   3. Top navigation bar                8. Toasts (pop-up notifications)
   4. Page layouts                      9. Landing page, stats, setup wizard
   5. Buttons, forms, inputs           10. Admin panel + responsive rules
   ========================================================================== */

/* ---------- 1. Design tokens ---------- */
/* Change the brand color once here and the whole site follows. */
:root{
  --bg:#F2F5F1;            /* page background */
  --surface:#FFFFFF;       /* cards, bars, inputs */
  --ink:#15201A;           /* main text */
  --muted:#5B675F;         /* secondary text */
  --faint:#8A958E;         /* placeholders, footers */
  --line:#E4E9E4;          /* soft borders */
  --line2:#CBD4CC;         /* stronger borders (inputs) */
  --brand:#0B7A3E;         /* primary green */
  --brand-d:#085E30;       /* dark green (hover, links) */
  --brand-t:#E7F3EB;       /* green tint (chips, active nav) */
  --amber:#9A5A06;         /* warnings, pending */
  --amber-t:#FDF3E0;
  --red:#B42318;           /* errors, failed, danger buttons */
  --red-t:#FDECEA;
  --radius:12px;           /* card corner size */
  --shadow:0 1px 2px rgba(20,32,26,.05);
  --shadow-lg:0 10px 30px -8px rgba(20,32,26,.25);
}

/* ---------- 2. Base & typography ---------- */
*{box-sizing:border-box}
body{margin:0;min-height:100vh;display:flex;flex-direction:column;background:var(--bg);color:var(--ink);
  font:15px/1.5 'Figtree',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;font-variant-numeric:tabular-nums}
h1{font-size:22px;line-height:1.25;margin:0 0 4px;letter-spacing:-.01em}
h2{font-size:16px;margin:0}
a{color:var(--brand-d)}
.lead{margin:0 0 22px;color:var(--muted);font-size:14px}

/* ---------- 3. Top navigation bar ---------- */
.topbar{background:var(--surface);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50}
.topbar-in{max-width:1040px;margin:0 auto;padding:0 20px;height:60px;display:flex;align-items:center;justify-content:space-between}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;color:var(--ink);text-decoration:none}
.brand-mark{width:28px;height:28px;border-radius:7px;background:var(--brand);display:grid;place-items:center}
.brand-mark svg{width:16px;height:16px}
.nav{display:flex;gap:4px;flex-wrap:wrap}
.nav a{padding:8px 12px;border-radius:8px;color:var(--muted);text-decoration:none;font-weight:600;font-size:14px}
.nav a:hover{background:var(--bg);color:var(--ink)}
.nav a[aria-current=page]{background:var(--brand-t);color:var(--brand-d)}

/* ---------- 4. Page layouts ---------- */
.page{flex:1;width:100%;max-width:1040px;margin:0 auto;padding:32px 20px 48px}
.page.narrow{max-width:480px}   /* sign in / pay pages */
.page.mid{max-width:680px}      /* payment setup */
.page.wide{max-width:1200px}    /* admin */
.layout{display:grid;grid-template-columns:minmax(0,420px) minmax(0,1fr);gap:24px;align-items:start}
.layout2{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,1fr);gap:24px;align-items:start}
@media(max-width:860px){.layout{grid-template-columns:1fr}}
@media(max-width:900px){.layout2{grid-template-columns:1fr}}

/* Cards: the white panels everything sits on */
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.pad{padding:24px}
.card form.pad{padding:20px}
.card-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:16px 20px;border-bottom:1px solid var(--line)}

/* ---------- 5. Buttons, forms, inputs ---------- */
/* Buttons: .btn base + btn-primary (green), btn-ghost (outline), btn-danger (red outline) */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 18px;border-radius:8px;border:1px solid transparent;font:inherit;font-weight:600;cursor:pointer;text-decoration:none}
.btn:focus-visible,.tx-del:focus-visible,.seg button:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.btn:disabled{opacity:.55;cursor:not-allowed}
.btn-primary{width:100%;background:var(--brand);color:#fff}
.btn-primary:hover:not(:disabled){background:var(--brand-d)}
.btn-sm{height:36px;padding:0 12px;font-size:13px}
.btn-auto{width:auto}           /* undo the full-width primary for inline buttons */
.btn-ghost{background:#fff;border-color:var(--line2);color:var(--ink)}
.btn-ghost:hover:not(:disabled){background:var(--bg)}
.btn-danger{background:#fff;border-color:#E9B7B2;color:var(--red)}
.btn-danger:hover:not(:disabled){background:var(--red-t)}

/* Form fields */
.field{margin-bottom:16px}
label{display:block;font-size:13px;font-weight:600;margin-bottom:6px}
.input{width:100%;height:44px;padding:0 12px;border:1px solid var(--line2);border-radius:8px;background:#fff;color:var(--ink);font:inherit}
.input::placeholder{color:#9AA59E}
.input:hover{border-color:#B6C0B8}
.input:focus-visible{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(11,122,62,.18)}
.input[aria-invalid=true]{border-color:var(--red)}
.prefix{position:relative}
.prefix span{position:absolute;left:12px;top:50%;transform:translateY(-50%);color:var(--muted);font-weight:600;font-size:13px;pointer-events:none}
.prefix .input{padding-left:48px}
.err{margin:6px 0 0;font-size:12.5px;color:var(--red)}
.note{display:flex;align-items:center;justify-content:center;gap:6px;margin:16px 0 0;font-size:12.5px;color:var(--muted)}
.hint{margin:6px 0 0;font-size:12.5px;color:var(--muted)}
.opt{font-weight:500;color:var(--faint)}

/* "KES" prefix fixed-amount banner on the pay page */
.fixed{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px;padding:12px 14px;border-radius:8px;background:var(--brand-t);color:var(--brand-d)}
.fixed b{font-size:18px}

/* Segmented control (Sign in / Create account, status filters, admin tabs) */
.seg{display:inline-flex;gap:2px;padding:3px;background:var(--bg);border-radius:9px;flex-wrap:wrap}
.seg button{border:0;background:none;font:inherit;font-size:13px;font-weight:600;color:var(--muted);padding:5px 12px;border-radius:7px;cursor:pointer}
.seg button[aria-pressed=true]{background:#fff;color:var(--ink);box-shadow:0 1px 2px rgba(20,32,26,.12)}

/* Toolbar row with search box (transactions, admin lists) */
.toolbar{display:flex;flex-wrap:wrap;gap:10px;align-items:center;padding:14px 20px;border-bottom:1px solid var(--line)}
.search{position:relative;flex:1;min-width:180px}
.search svg{position:absolute;left:12px;top:50%;transform:translateY(-50%);width:16px;height:16px;color:var(--faint)}
.search .input{height:38px;padding-left:36px;font-size:14px}
.sel{height:38px;padding:0 10px;border:1px solid var(--line2);border-radius:8px;background:#fff;font:inherit;font-size:14px;color:var(--ink);max-width:220px}
.live{display:inline-flex;align-items:center;gap:6px;font-size:12.5px;color:var(--muted)}
.live::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--brand)}
.live.off::before{background:#C2682A}

/* ---------- 6. Badges, banners, alerts ---------- */
/* Status pill: green = paid, amber = pending, red = failed */
.badge{display:inline-flex;align-items:center;gap:6px;height:24px;padding:0 9px;border-radius:999px;font-size:12px;font-weight:600;white-space:nowrap}
.badge::before{content:"";width:6px;height:6px;border-radius:50%;background:currentColor}
.badge.success{background:var(--brand-t);color:var(--brand-d)}
.badge.pending{background:var(--amber-t);color:var(--amber)}
.badge.failed{background:var(--red-t);color:var(--red)}

/* Amber notice strips */
.banner{margin:0 0 20px;padding:12px 16px;border-radius:10px;background:var(--amber-t);border:1px solid #F1DDB0;color:#6E4004;font-size:14px}
.callout{margin:0;padding:12px 20px;background:var(--amber-t);border-top:1px solid #F1DDB0;border-bottom:1px solid #F1DDB0;color:#6E4004;font-size:14px}
.callout.soft{margin:0 0 16px;border:1px solid #F1DDB0;border-radius:10px}
.callout a{color:inherit;font-weight:600}

/* Waiting spinner + box (STK push in progress) */
.progress{display:none;align-items:center;gap:12px;margin-top:16px;padding:14px 16px;border-radius:10px;background:var(--amber-t);border:1px solid #F1DDB0}
.progress.show{display:flex}
.spinner{flex:none;width:20px;height:20px;border-radius:50%;border:2.5px solid #E9CF92;border-top-color:var(--amber);animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.progress b{display:block;font-size:14px;color:#6E4004}
.progress small{font-size:13px;color:#7A5A1D}

/* ---------- 7. Lists: transactions, payment links, tills ---------- */
.tx-list{list-style:none;margin:0;padding:0}
.tx,.tx-head{display:grid;align-items:center;gap:12px;padding:13px 20px}
.tx{border-bottom:1px solid var(--line)}
.tx:last-child{border-bottom:0}
.tx:hover{background:#FAFBFA}
.tx.busy{opacity:.4;pointer-events:none}
.tx-full,.tx-head{grid-template-columns:minmax(0,2fr) minmax(0,1.2fr) 100px 120px 84px 34px}
.tx-compact{grid-template-columns:minmax(0,1fr) auto 34px}
.tx-head{padding-top:10px;padding-bottom:10px;background:#FAFBFA;border-bottom:1px solid var(--line);font-size:12.5px;font-weight:600;color:var(--muted)}
.tx-head .r{text-align:right}
.tx-name{font-weight:600;font-size:14px}
.tx-name,.tx-sub{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.tx-sub,.tx-time{font-size:12.5px;color:var(--muted)}
.tx-time,.tx-amount{text-align:right;white-space:nowrap}
.tx-amount{font-weight:700}
.tx-stack{display:flex;flex-direction:column;align-items:flex-end;gap:4px}
.tx-del{width:34px;height:34px;border:0;border-radius:8px;background:none;color:var(--faint);cursor:pointer;display:grid;place-items:center}
.tx-del:hover{background:var(--red-t);color:var(--red)}
.tx-del svg{width:17px;height:17px}

/* Payment link rows (dashboard) */
.lnk-form{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr) auto;gap:10px;padding:14px 20px;border-bottom:1px solid var(--line)}
.lnk-form .input{height:38px;font-size:14px}
.lnk-form .prefix .input{padding-left:46px}
.lnk{display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px 16px;padding:14px 20px;border-bottom:1px solid var(--line)}
.lnk:last-child{border-bottom:0}
.lnk.off .lnk-main{opacity:.55}
.lnk-main{min-width:0;flex:1 1 240px}
.lnk-url{margin-top:4px;font-size:12.5px;color:var(--brand-d);word-break:break-all}
.lnk-act{display:flex;flex-wrap:wrap;gap:6px;align-items:flex-start}
.lnk-act .btn{text-decoration:none;display:inline-flex;align-items:center}
.lnk-act .move{height:36px;width:auto;max-width:150px;font-size:13px;padding:0 8px}

/* Till rows (setup page + admin merchant detail) */
.till{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 20px;border-bottom:1px solid var(--line)}
.till-form{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr) auto;gap:10px;padding:14px 20px}
.till-form .input{height:38px;font-size:14px}
.reg{border-top:1px solid var(--line);padding:0 20px}
.reg summary{padding:14px 0;cursor:pointer;font-weight:600;font-size:14px;color:var(--brand-d)}
.reg-form{display:grid;gap:10px;padding:0 0 18px}
.reg-form .input{height:38px;font-size:14px}
.new-till{grid-column:1/-1;display:grid;gap:10px;padding:12px;border:1px dashed var(--line2);border-radius:10px;background:#FAFBFA}
.new-till .hint{margin:0}

/* Empty state (no items yet) */
.empty{padding:40px 20px;text-align:center;color:var(--muted);font-size:14px}
.empty b{display:block;color:var(--ink);margin-bottom:2px}

/* ---------- 8. Toasts ---------- */
.toasts{position:fixed;top:16px;right:16px;left:16px;z-index:1000;display:flex;flex-direction:column;align-items:flex-end;gap:10px;pointer-events:none}
.toast{pointer-events:auto;display:flex;gap:12px;width:100%;max-width:380px;padding:14px 12px 14px 16px;background:#fff;border:1px solid var(--line);border-left:4px solid var(--brand);border-radius:10px;box-shadow:var(--shadow-lg);animation:in .2s ease-out}
.toast.failed{border-left-color:var(--red)}
.toast.info{border-left-color:var(--amber)}
.toast.hide{opacity:0;transform:translateY(-6px);transition:.18s}
@keyframes in{from{opacity:0;transform:translateY(-6px)}}
.toast-body{flex:1;min-width:0}
.toast-title{font-weight:700;font-size:14.5px}
.toast-desc{font-size:13px;color:var(--muted)}
.toast-x{border:0;background:none;width:24px;height:24px;border-radius:6px;color:var(--muted);cursor:pointer;font-size:18px;line-height:1}
.toast-x:hover{background:var(--bg)}
.rcpt{margin-top:10px;padding-top:10px;border-top:1px dashed var(--line2)}
.rcpt div{display:flex;justify-content:space-between;gap:12px;font-size:13px;padding:2px 0}
.rcpt span:first-child{color:var(--muted)}
.rcpt span:last-child{font-weight:600}

/* ---------- 9. Landing page, stats, setup wizard ---------- */
.hero{padding:36px 0 28px;max-width:640px}
.hero h1{font-size:34px;line-height:1.15;letter-spacing:-.02em;margin-bottom:12px}
.hero .lead{font-size:16px;margin-bottom:22px}
.hero-cta{display:flex;flex-wrap:wrap;gap:10px}
.how{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.how .lead{margin:6px 0 0}
@media(max-width:760px){.how{grid-template-columns:1fr}.hero h1{font-size:27px}}

/* Stat cards (dashboard + admin overview) */
.stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-bottom:24px}
.stat{padding:16px 20px}
.stat span{display:block;font-size:13px;color:var(--muted)}
.stat b{font-size:22px;letter-spacing:-.01em}
@media(max-width:620px){.stats{grid-template-columns:1fr}}

/* Guided "add a till" steps (payment setup) */
.steps{list-style:none;margin:0 0 20px;padding:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.steps li{display:flex;gap:12px;align-items:center;padding:12px 14px;border:1px solid var(--line);border-radius:12px;background:var(--surface);color:var(--muted)}
.steps i{flex:none;width:28px;height:28px;border-radius:50%;display:grid;place-items:center;font-style:normal;font-weight:700;font-size:13px;background:var(--bg);color:var(--muted)}
.steps b{display:block;font-size:14px;color:var(--ink)}
.steps small{display:block;font-size:12.5px}
.steps li.now{border-color:var(--brand);background:var(--brand-t)}
.steps li.now i{background:var(--brand);color:#fff}
.steps li.done i{background:var(--brand-t);color:var(--brand-d);font-size:0}
.steps li.done i::before{content:"\2713";font-size:14px}
@media(max-width:760px){.steps{grid-template-columns:1fr}}
.wiz{padding:20px;border-top:1px solid var(--line)}
.wiz-h{font-size:16px;margin:0 0 6px}
.wiz-p{margin:0 0 16px;font-size:14px;color:var(--muted)}
.wiz-q{display:flex;align-items:center;gap:10px;margin:18px 0 12px;font-weight:700;font-size:14px}
.wiz-q span{flex:none;width:22px;height:22px;border-radius:50%;background:var(--brand);color:#fff;display:grid;place-items:center;font-size:12px}
.choice{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}
@media(max-width:620px){.choice{grid-template-columns:1fr}}
.opt-card{text-align:left;font:inherit;color:var(--ink);background:#fff;border:1.5px solid var(--line2);border-radius:10px;padding:12px;cursor:pointer;display:block}
.opt-card b{display:block;font-size:14px;margin-bottom:2px}
.opt-card small{display:block;font-size:12.5px;color:var(--muted);line-height:1.4}
.opt-card:hover{border-color:#B6C0B8}
.opt-card[aria-pressed=true]{border-color:var(--brand);background:var(--brand-t);box-shadow:0 0 0 3px rgba(11,122,62,.12)}
.opt-card:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.how-to{margin:0 0 14px;padding-left:20px;font-size:14px;color:var(--muted);display:grid;gap:6px}
.how-to b{color:var(--ink)}
.wiz .reg{border:1px solid var(--line);border-radius:10px;padding:0 14px;margin-top:18px}
.wiz .reg summary{padding:12px 0}
.wiz .till-form{padding:0 0 16px}
.setup-cta,.done-box{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px 20px;margin:0 0 20px;padding:18px 20px;border-radius:12px;background:var(--brand-t);border:1px solid #BFE0CB}
.setup-cta b,.done-box b{font-size:15px;color:var(--brand-d)}
.setup-cta p,.done-box p{margin:2px 0 0;font-size:14px;color:var(--muted)}

/* ---------- 10. Admin panel ---------- */
.a-title{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;flex-wrap:wrap}
.a-tabs{margin:4px 0 20px}
.a-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin-bottom:20px}
@media(max-width:900px){.a-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
.a-two{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(0,1fr);gap:24px;align-items:start}
@media(max-width:900px){.a-two{grid-template-columns:1fr}}
.stack{display:grid;gap:24px}

/* Merchant table */
.a-head,.a-row{display:grid;grid-template-columns:minmax(0,2.2fr) 64px 64px minmax(0,1fr) minmax(0,1fr) 100px;gap:12px;align-items:center;padding:13px 20px}
.a-head{padding-top:10px;padding-bottom:10px;background:#FAFBFA;border-bottom:1px solid var(--line);font-size:12.5px;font-weight:600;color:var(--muted)}
.a-row{width:100%;text-align:left;font:inherit;color:inherit;background:none;border:0;border-bottom:1px solid var(--line);cursor:pointer}
.a-row:last-child{border-bottom:0}
.a-row:hover{background:#FAFBFA}
.a-row:focus-visible{outline:2px solid var(--brand);outline-offset:-2px}
.a-head .r,.a-row .r{text-align:right}

/* "All tills" table: till / number / channel / merchant / action */
.tills-head,.till-row{grid-template-columns:minmax(0,1.6fr) 110px 130px minmax(0,1.5fr) 96px}
.till-add{grid-template-columns:minmax(0,1.6fr) minmax(0,1fr) minmax(0,1fr) auto}

/* Admin transactions table */
.a-tx-head,.a-tx{display:grid;grid-template-columns:minmax(0,1.8fr) minmax(0,1.2fr) 90px 110px 90px 34px;gap:12px;align-items:center;padding:13px 20px}
.a-tx{border-bottom:1px solid var(--line)}
.a-tx:last-child{border-bottom:0}
.a-tx:hover{background:#FAFBFA}
.a-tx.busy{opacity:.4;pointer-events:none}
.a-tx-head{padding-top:10px;padding-bottom:10px;background:#FAFBFA;border-bottom:1px solid var(--line);font-size:12.5px;font-weight:600;color:var(--muted)}
.a-tx-head .r{text-align:right}

/* 7-day bar chart */
.bars{display:flex;align-items:flex-end;gap:10px;height:170px;padding:20px 20px 12px}
.bar{flex:1;height:100%;display:flex;flex-direction:column;justify-content:flex-end;align-items:center;gap:6px;min-width:0}
.bar i{display:block;width:100%;background:var(--brand);border-radius:6px 6px 0 0;min-height:3px}
.bar small{font-size:11.5px;color:var(--muted);white-space:nowrap}
.bar em{font-style:normal;font-size:11.5px;font-weight:600}

/* Platform setup checklist */
.chk{display:flex;gap:10px;align-items:flex-start;padding:11px 20px;border-bottom:1px solid var(--line);font-size:14px}
.chk:last-child{border-bottom:0}
.chk b{flex:none;width:20px;text-align:center}
.chk b.ok{color:var(--brand)}
.chk b.warn{color:var(--amber)}
.chk span small{display:block;color:var(--muted);font-size:12.5px}

/* Merchant detail page */
.kv{display:flex;justify-content:space-between;gap:12px;padding:11px 20px;border-bottom:1px solid var(--line);font-size:14px}
.kv:last-child{border-bottom:0}
.kv span:first-child{color:var(--muted)}
.kv span:last-child{text-align:right;min-width:0;overflow-wrap:anywhere}
.acts{display:flex;flex-wrap:wrap;gap:8px;padding:14px 20px}
.back{margin:0 0 14px}
.d-head{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:flex-start;gap:12px;margin-bottom:20px}
.d-head .sub{display:flex;flex-wrap:wrap;align-items:center;gap:10px;color:var(--muted);font-size:14px}

/* Admin password gate: centered lock card shown before the panel unlocks */
.gate{max-width:430px;margin:40px auto 0}

/* ---------- Footer ---------- */
.site-footer{padding:20px;text-align:center;color:var(--faint);font-size:13px}

/* ---------- Responsive & motion ---------- */
@media(max-width:720px){
  .tx-head{display:none}
  .tx-full{grid-template-columns:minmax(0,1fr) auto 34px;grid-template-areas:"who amt del" "rec st del" "time time del";row-gap:4px}
  .tx-full .who{grid-area:who}
  .tx-full .rec{grid-area:rec}
  .tx-full .st{grid-area:st;justify-self:end}
  .tx-full .tx-amount{grid-area:amt}
  .tx-full .tx-time{grid-area:time;text-align:left}
  .tx-full .tx-del{grid-area:del}
  .tx-full .rec:empty{display:none}
}
@media(max-width:820px){
  .a-head,.a-tx-head,.hide-m{display:none}
  .a-row{grid-template-columns:minmax(0,1fr) auto}
  .a-tx{grid-template-columns:minmax(0,1fr) auto auto 34px;gap:8px}
}
@media(max-width:620px){
  .lnk-form,.till-form,.till-add{grid-template-columns:1fr}
}
@media(prefers-reduced-motion:reduce){.spinner{animation-duration:2.4s}.toast{animation:none}}