/* Sheet2Store design system: tokens, base, shared components (header, footer, buttons, forms, cards). */
:root{
  --font:'Inter',ui-sans-serif,system-ui,-apple-system,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;
  --display:'Plus Jakarta Sans','Inter',ui-sans-serif,system-ui,-apple-system,'Segoe UI',sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,'Liberation Mono',monospace;
  --ink:#132b52;--ink-2:#2a3e62;--muted:#56657f;--faint:#8593aa;
  --line:#e3e9f2;--line-2:#d3ddea;--bg:#fff;--paper:#f6f9fd;--paper-2:#edf2f9;
  --blue:#0a6cef;--blue-600:#0757c4;--blue-700:#0a4aa3;--blue-50:#eaf2ff;--blue-100:#d6e6ff;
  --teal:#12ad96;--teal-600:#0b8f7a;--teal-50:#e4f7f2;
  --amber:#a35a06;--amber-50:#fff5e5;--red:#bf3129;--red-50:#fdefee;
  --r-sm:8px;--r:12px;--r-lg:18px;--r-xl:24px;
  --shadow-sm:0 1px 2px rgba(19,43,82,.06);
  --shadow:0 14px 34px -18px rgba(19,43,82,.32);
  --shadow-lg:0 44px 90px -38px rgba(19,43,82,.42),0 14px 30px -18px rgba(19,43,82,.18);
  --wrap:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 var(--font);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility}
img,svg{max-width:100%}
h1,h2,h3,h4{font-family:var(--display);color:var(--ink);line-height:1.12;letter-spacing:-.025em;margin:0 0 .5em;font-weight:750}
h1{font-size:clamp(2.2rem,4.4vw,3.6rem);letter-spacing:-.035em;font-weight:800}
h2{font-size:clamp(1.65rem,2.6vw,2.35rem)}
h3{font-size:1.15rem;letter-spacing:-.015em}
p{margin:0 0 1em;color:var(--muted)}
a{color:var(--blue);text-underline-offset:3px}
a:hover{color:var(--blue-600)}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
button:disabled{cursor:not-allowed;opacity:.55}
:focus-visible{outline:3px solid rgba(10,108,239,.45);outline-offset:3px;border-radius:6px}
.hidden{display:none!important}
.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}
.skip{position:absolute;left:12px;top:-120px;z-index:100;background:#fff;color:var(--ink);padding:10px 14px;border-radius:8px;box-shadow:var(--shadow)}
.skip:focus{top:12px}
.container{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 24px}
.kicker{display:inline-block;font:700 .75rem/1.2 var(--font);letter-spacing:.14em;text-transform:uppercase;color:var(--blue);margin-bottom:14px}
.muted{color:var(--muted)}
.mono{font-family:var(--mono)}

/* Buttons (legacy combos .btn.dark/.outline/.small/.full kept for existing scripts) */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:10px;padding:11px 18px;font:600 .95rem/1.3 var(--font);text-decoration:none;white-space:nowrap;background:#fff;color:var(--ink);transition:background .15s,border-color .15s,box-shadow .15s,transform .15s;cursor:pointer}
.btn:hover{text-decoration:none}
.btn:active:not(:disabled){transform:translateY(1px)}
.btn-primary,.btn.dark{background:var(--blue);color:#fff;box-shadow:0 1px 0 rgba(255,255,255,.18) inset,0 10px 22px -12px rgba(10,108,239,.85)}
.btn-primary:hover,.btn.dark:hover{background:var(--blue-600);color:#fff}
.btn-secondary,.btn.outline{background:#fff;border-color:var(--line-2);color:var(--ink);box-shadow:var(--shadow-sm)}
.btn-secondary:hover,.btn.outline:hover{border-color:#b9c7dc;background:var(--paper);color:var(--ink)}
.btn-navy{background:var(--ink);color:#fff}.btn-navy:hover{background:#0c1f3f;color:#fff}
.btn-ghost{background:transparent;color:var(--ink)}.btn-ghost:hover{background:var(--paper-2);color:var(--ink)}
.btn.lime,.btn-teal{background:var(--teal-50);color:var(--teal-600)}.btn.lime:hover,.btn-teal:hover{background:#cff1e8;color:var(--teal-600)}
.btn-lg{padding:14px 22px;font-size:1rem;border-radius:12px}
.btn-sm,.btn.small{padding:8px 12px;font-size:.86rem;border-radius:9px}
.btn-block,.btn.full{width:100%}
.text-link{background:none;border:0;padding:0;color:var(--blue);font-weight:600;font-size:.92rem;text-decoration:underline;text-underline-offset:3px;cursor:pointer}
.text-link:hover{color:var(--blue-600)}
.danger-text{color:var(--red)!important}

/* Pills, badges, status */
.pill{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--line);background:#fff;border-radius:999px;padding:5px 12px 5px 5px;font-size:.84rem;font-weight:600;color:var(--ink);text-decoration:none;box-shadow:var(--shadow-sm)}
.pill b{background:var(--teal-50);color:var(--teal-600);border-radius:999px;padding:2px 9px;font-size:.75rem}
.pill:hover{color:var(--ink);border-color:var(--line-2)}
.chip{display:inline-flex;align-items:center;gap:6px;border-radius:999px;padding:4px 10px;font-size:.75rem;font-weight:700;letter-spacing:.04em;background:var(--blue-50);color:var(--blue-600)}
.status-pill{display:inline-flex;align-items:center;gap:6px;border-radius:999px;padding:3px 10px;font-size:.78rem;font-weight:700;background:var(--teal-50);color:var(--teal-600);white-space:nowrap}
.status-pill::before{content:"";width:6px;height:6px;border-radius:50%;background:currentColor}
.status-pill.warn{background:var(--amber-50);color:var(--amber)}
.status-pill.error{background:var(--red-50);color:var(--red)}
.status-pill.neutral{background:var(--paper-2);color:var(--muted)}

/* Alerts */
.notice{border:1px solid var(--blue-100);background:var(--blue-50);color:var(--ink-2);border-radius:var(--r);padding:12px 16px;font-size:.93rem}
.alert{border-radius:var(--r);padding:12px 16px;font-size:.93rem}
.alert.error{border:1px solid #f3c6c2;background:var(--red-50);color:#8f231d}

/* Forms */
label{display:block;font-weight:600;font-size:.86rem;color:var(--ink-2)}
input[type=text],input[type=email],input[type=password],input[type=number],input[type=search],input:not([type]),select,textarea{display:block;width:100%;margin-top:6px;border:1px solid var(--line-2);border-radius:10px;background:#fff;padding:10px 12px;font-size:.95rem;font-weight:500;color:var(--ink);box-shadow:var(--shadow-sm);transition:border-color .15s,box-shadow .15s}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 4px rgba(10,108,239,.14)}
textarea{min-height:96px;resize:vertical}
input[type=checkbox]{width:18px;height:18px;accent-color:var(--blue);margin:0;flex:none}
.checkbox-row{display:flex;align-items:flex-start;gap:10px;font-weight:500;color:var(--ink-2);font-size:.9rem;line-height:1.45}
.field-help{font-size:.82rem;color:var(--muted);margin:6px 0 0}

/* Cards */
.card{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--shadow-sm)}

/* Header */
.site-header{position:sticky;top:0;z-index:40;background:rgba(255,255,255,.86);backdrop-filter:saturate(1.6) blur(12px);-webkit-backdrop-filter:saturate(1.6) blur(12px);border-bottom:1px solid rgba(227,233,242,.8)}
.site-header-inner{display:flex;align-items:center;gap:28px;height:72px}
.logo{display:inline-flex;align-items:center;flex:none}
.logo img{display:block;height:48px;width:auto}
.site-nav{display:flex;gap:4px;margin-left:12px}
.site-nav a{padding:8px 12px;border-radius:9px;color:var(--ink-2);font-weight:550;font-size:.93rem;text-decoration:none}
.site-nav a:hover,.site-nav a[aria-current=page],.site-nav a.active{background:var(--paper-2);color:var(--ink)}
.site-actions{display:flex;align-items:center;gap:8px;margin-left:auto}
.site-actions .signin{font-weight:600;font-size:.93rem;color:var(--ink);text-decoration:none;padding:8px 10px;border-radius:9px;background:none;border:0}
.site-actions .signin:hover{background:var(--paper-2)}
.lang-picker{position:relative}
.lang-picker summary{list-style:none;cursor:pointer;display:flex;align-items:center;gap:6px;padding:8px 10px;border-radius:9px;font-weight:600;font-size:.86rem;color:var(--ink-2)}
.lang-picker summary::-webkit-details-marker{display:none}
.lang-picker summary:hover{background:var(--paper-2)}
.lang-picker>div{position:absolute;right:0;top:calc(100% + 8px);background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);padding:6px;display:grid;min-width:170px;z-index:50}
.lang-picker a{padding:8px 12px;border-radius:8px;text-decoration:none;color:var(--ink-2);font-size:.9rem}
.lang-picker a:hover,.lang-picker a[aria-current=page]{background:var(--blue-50);color:var(--blue-600)}
.nav-menu{display:none;position:relative}
.nav-menu summary{list-style:none;cursor:pointer;width:42px;height:42px;border-radius:10px;border:1px solid var(--line-2);display:grid;place-items:center;background:#fff}
.nav-menu summary::-webkit-details-marker{display:none}
.nav-menu summary span,.nav-menu summary span::before,.nav-menu summary span::after{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;position:relative;content:""}
.nav-menu summary span::before{position:absolute;top:-6px}.nav-menu summary span::after{position:absolute;top:6px}
.nav-menu[open] summary span{background:transparent}.nav-menu[open] summary span::before{top:0;transform:rotate(45deg)}.nav-menu[open] summary span::after{top:0;transform:rotate(-45deg)}
.nav-menu nav{position:absolute;right:0;top:52px;width:min(280px,calc(100vw - 32px));background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow-lg);padding:8px;display:grid}
.nav-menu nav a{padding:12px 14px;border-radius:10px;text-decoration:none;color:var(--ink);font-weight:600}
.nav-menu nav a:hover{background:var(--paper-2)}
.nav-menu nav .btn{margin-top:6px}

/* Footer */
.site-footer{background:var(--paper);border-top:1px solid var(--line);margin-top:0;padding:56px 0 28px;color:var(--muted);font-size:.9rem}
.footer-grid{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:32px}
.footer-brand img{height:40px;width:auto;display:block;margin-bottom:12px}
.footer-brand p{max-width:300px;font-size:.9rem}
.footer-col h4{font:700 .74rem/1.2 var(--font);letter-spacing:.12em;text-transform:uppercase;color:var(--faint);margin:6px 0 14px}
.footer-col a{display:block;color:var(--ink-2);text-decoration:none;padding:4px 0;font-size:.92rem}
.footer-col a:hover{color:var(--blue)}
.footer-langs{display:flex;flex-wrap:wrap;gap:6px 16px;border-top:1px solid var(--line);margin-top:36px;padding-top:20px}
.footer-langs a{color:var(--muted);text-decoration:none;font-size:.86rem}
.footer-langs a[aria-current=page],.footer-langs a:hover{color:var(--ink)}
.footer-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;margin-top:18px;font-size:.82rem;color:var(--faint)}

/* Link cards (tools, guides) */
.tool-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.tool-card{position:relative;display:flex;flex-direction:column;gap:8px;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:22px 22px 44px;text-decoration:none;color:var(--ink);box-shadow:var(--shadow-sm);transition:border-color .15s,box-shadow .15s,transform .15s}
.tool-card:hover{border-color:#bcd3f5;box-shadow:var(--shadow);transform:translateY(-2px);color:var(--ink)}
.tool-card.current{border-color:var(--blue);box-shadow:0 0 0 3px var(--blue-50)}
.tool-card .chip{align-self:flex-start;margin-bottom:6px}
.tool-card h3{margin:0;font-size:1.06rem}
.tool-card p{margin:0;font-size:.9rem;line-height:1.55}
.card-arrow{position:absolute;right:20px;bottom:16px;color:var(--blue);font-weight:800}
html[dir=rtl] .card-arrow{right:auto;left:20px;transform:scaleX(-1)}

/* Dialog + toast */
dialog{border:0;border-radius:20px;padding:28px;width:min(560px,calc(100vw - 24px));max-height:calc(100vh - 40px);box-shadow:0 40px 100px -30px rgba(10,25,55,.55);color:var(--ink)}
dialog::backdrop{background:rgba(12,24,48,.45);backdrop-filter:blur(3px)}
dialog h2{font-size:1.45rem;margin-bottom:8px}
.dialog-close{position:absolute;right:16px;top:14px;width:36px;height:36px;border-radius:10px;border:0;background:var(--paper-2);color:var(--ink);font-size:1.3rem;line-height:1}
.dialog-close:hover{background:var(--line)}
.dialog-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:18px}
.toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%);z-index:90;background:var(--ink);color:#fff;border-radius:12px;padding:12px 18px;font-weight:600;font-size:.92rem;box-shadow:var(--shadow-lg);max-width:calc(100vw - 32px)}

@media (max-width:1080px){
  .tool-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:980px){
  .site-nav{display:none}
  .site-actions .signin,.site-actions .hide-sm{display:none}
  .nav-menu{display:block}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:1/-1}
}
@media (max-width:760px){
  .tool-grid{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:560px){
  .site-actions>.btn{display:none}
  .container{padding:0 16px}
  .site-header-inner{height:64px;gap:12px}
  .logo img{height:38px}
  .site-actions .btn{padding:9px 13px;font-size:.88rem}
  .footer-grid{grid-template-columns:1fr 1fr;gap:24px}
  dialog{padding:22px 18px}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important;scroll-behavior:auto!important}}