/* ========================================
   KorkoLasku.com - Main stylesheet
   Mobile-first / localized site / SEO-friendly
   ======================================== */

/* ----- Reset & base ----- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Helvetica Neue",Arial,"Noto Sans",sans-serif;
  font-size:16px;line-height:1.65;color:#1f2937;background:#f8fafc;
  -webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;
  word-wrap:break-word;overflow-wrap:break-word;
}
img,svg{max-width:100%;height:auto;display:block}
a{color:#0f766e;text-decoration:none;transition:color .2s}
a:hover{color:#0d9488;text-decoration:underline}
ul,ol{padding-left:1.25rem}
li{margin-bottom:.4rem}

/* ----- CSS variables ----- */
:root{
  --c-primary:#0f766e;
  --c-primary-dark:#0d9488;
  --c-primary-light:#ccfbf1;
  --c-accent:#f59e0b;
  --c-bg:#f8fafc;
  --c-card:#ffffff;
  --c-border:#e5e7eb;
  --c-text:#1f2937;
  --c-muted:#6b7280;
  --c-success:#16a34a;
  --c-danger:#dc2626;
  --c-warning:#f59e0b;
  --shadow-sm:0 1px 2px rgba(0,0,0,.05);
  --shadow:0 4px 6px -1px rgba(0,0,0,.08),0 2px 4px -1px rgba(0,0,0,.04);
  --shadow-lg:0 10px 25px -3px rgba(0,0,0,.08),0 4px 6px -2px rgba(0,0,0,.04);
  --radius:.5rem;
  --radius-lg:1rem;
  --maxw:1200px;
}

/* ----- Layout ----- */
.container{max-width:var(--maxw);margin:0 auto;padding:0 1rem}
.row{display:flex;flex-wrap:wrap;gap:1.5rem}
.col{flex:1 1 0;min-width:0}
.col-main{flex:2 1 0;min-width:0}
.col-side{flex:1 1 280px;min-width:0}
@media (max-width:768px){
  .row{flex-direction:column;gap:1rem}
}

/* ----- Header ----- */
.site-header{
  background:#fff;border-bottom:1px solid var(--c-border);
  position:sticky;top:0;z-index:100;box-shadow:var(--shadow-sm);
}
.site-header .container{display:flex;align-items:center;justify-content:space-between;padding-top:.75rem;padding-bottom:.75rem;flex-wrap:wrap;gap:.75rem}
.brand{display:flex;align-items:center;gap:.5rem;font-weight:700;color:var(--c-primary);font-size:1.25rem}
.brand .logo{
  width:36px;height:36px;border-radius:8px;
  background:linear-gradient(135deg,var(--c-primary) 0%,var(--c-primary-dark) 100%);
  color:#fff;display:inline-flex;align-items:center;justify-content:center;font-size:1.25rem;
}
.nav-main ul{list-style:none;display:flex;flex-wrap:wrap;gap:.25rem;padding:0;margin:0}
.nav-main a{
  display:inline-block;padding:.5rem .75rem;color:var(--c-text);
  border-radius:.375rem;font-weight:500;font-size:.95rem;
}
.nav-main a:hover{background:var(--c-primary-light);color:var(--c-primary);text-decoration:none}
.nav-toggle{
  display:none;background:none;border:1px solid var(--c-border);
  border-radius:.375rem;padding:.5rem .75rem;cursor:pointer;font-size:1.1rem;
}
@media (max-width:900px){
  .nav-toggle{display:inline-block}
  .nav-main{width:100%;display:none}
  .nav-main.open{display:block}
  .nav-main ul{flex-direction:column;gap:0;border-top:1px solid var(--c-border);margin-top:.5rem;padding-top:.5rem}
  .nav-main a{display:block;padding:.6rem .5rem;border-bottom:1px solid var(--c-border)}
}

/* ----- Hero / tool area ----- */
.hero{
  background:linear-gradient(135deg,#0f766e 0%,#14b8a6 100%);
  color:#fff;padding:2rem 0;text-align:center;
}
.hero h1{font-size:1.75rem;font-weight:800;line-height:1.2;margin-bottom:.5rem}
.hero p{opacity:.95;max-width:720px;margin:0 auto;font-size:1rem}
@media (min-width:768px){.hero h1{font-size:2.25rem}.hero{padding:2.5rem 0}}

/* ----- Tool cards ----- */
.tool-card{
  background:var(--c-card);border:1px solid var(--c-border);border-radius:var(--radius-lg);
  padding:1.25rem;box-shadow:var(--shadow);margin:-2rem auto 1.5rem;max-width:920px;position:relative;
}
@media (min-width:768px){.tool-card{padding:2rem}}
.tabs{display:flex;flex-wrap:wrap;gap:.4rem;border-bottom:1px solid var(--c-border);margin-bottom:1.25rem;overflow-x:auto;scrollbar-width:thin}
.tab-btn{
  background:none;border:none;border-bottom:3px solid transparent;
  padding:.6rem .9rem;font-size:.95rem;font-weight:600;cursor:pointer;color:var(--c-muted);
  white-space:nowrap;
}
.tab-btn:hover{color:var(--c-primary)}
.tab-btn.active{color:var(--c-primary);border-bottom-color:var(--c-primary)}
.tab-panel{display:none}
.tab-panel.active{display:block;animation:fadeIn .25s ease}
@keyframes fadeIn{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}

.form-row{display:grid;grid-template-columns:1fr;gap:1rem;margin-bottom:1rem}
@media (min-width:600px){.form-row.cols-2{grid-template-columns:1fr 1fr}}
@media (min-width:768px){.form-row.cols-3{grid-template-columns:1fr 1fr 1fr}.form-row.cols-4{grid-template-columns:1fr 1fr 1fr 1fr}}
.form-group{display:flex;flex-direction:column;gap:.35rem}
.form-group label{font-weight:600;font-size:.9rem;color:var(--c-text)}
.form-group .hint{font-size:.8rem;color:var(--c-muted);font-weight:400}
.form-group input,.form-group select,.form-group textarea{
  width:100%;padding:.65rem .75rem;font-size:1rem;font-family:inherit;
  border:1px solid var(--c-border);border-radius:.5rem;background:#fff;color:var(--c-text);
  transition:border-color .2s,box-shadow .2s;
}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{
  outline:none;border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(15,118,110,.15);
}
.form-group-inline{display:flex;gap:.5rem;align-items:end}
.form-group-inline > *{flex:1}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.4rem;
  padding:.7rem 1.2rem;font-size:1rem;font-weight:600;border:none;border-radius:.5rem;
  cursor:pointer;transition:background .2s,transform .05s;font-family:inherit;
}
.btn-primary{background:var(--c-primary);color:#fff}
.btn-primary:hover{background:var(--c-primary-dark)}
.btn-primary:active{transform:translateY(1px)}
.btn-secondary{background:var(--c-primary-light);color:var(--c-primary)}
.btn-secondary:hover{background:#99f6e4}
.btn-block{width:100%}
.btn-row{display:flex;flex-wrap:wrap;gap:.5rem;margin-top:1rem}

/* ----- Results area ----- */
.result-card{
  background:linear-gradient(135deg,#f0fdfa 0%,#ccfbf1 100%);
  border:2px solid var(--c-primary);border-radius:var(--radius-lg);
  padding:1.25rem;margin-top:1.5rem;
}
.result-card.primary{background:linear-gradient(135deg,#0f766e 0%,#0d9488 100%);color:#fff;border-color:var(--c-primary-dark)}
.result-card .result-headline{font-size:2rem;font-weight:800;line-height:1.1}
.result-card.primary .result-headline{color:#fff}
.result-card .result-label{font-size:.85rem;text-transform:uppercase;letter-spacing:.04em;opacity:.85;margin-bottom:.25rem}
.result-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:1rem;margin-top:1rem}
.result-item{background:rgba(255,255,255,.7);padding:.75rem;border-radius:.5rem}
.result-card.primary .result-item{background:rgba(255,255,255,.12);color:#fff}
.result-item .label{font-size:.75rem;opacity:.75;text-transform:uppercase;letter-spacing:.03em}
.result-item .value{font-size:1.15rem;font-weight:700}

/* ----- Tables ----- */
.table-wrap{overflow-x:auto;margin:1rem 0;border-radius:var(--radius);border:1px solid var(--c-border);background:#fff}
table{width:100%;border-collapse:collapse;font-size:.92rem;min-width:480px}
th,td{padding:.65rem .8rem;text-align:left;border-bottom:1px solid var(--c-border)}
th{background:#f1f5f9;font-weight:600;color:var(--c-text);position:sticky;top:0}
tbody tr:hover{background:#f9fafb}
td.num,th.num{text-align:right;font-variant-numeric:tabular-nums}

/* ----- Content cards ----- */
.content-section{margin:2rem 0}
.content-section h2{
  font-size:1.5rem;font-weight:700;margin-bottom:1rem;color:var(--c-text);
  border-left:4px solid var(--c-primary);padding-left:.75rem;
}
@media (min-width:768px){.content-section h2{font-size:1.75rem}}
.content-section h3{font-size:1.2rem;font-weight:700;margin:1.25rem 0 .5rem;color:var(--c-text)}
.content-section h4{font-size:1.05rem;font-weight:700;margin:1rem 0 .4rem}
.content-section p{margin-bottom:1rem;line-height:1.7}
.content-section ul,.content-section ol{margin-bottom:1rem;padding-left:1.5rem}

/* ----- Generic cards ----- */
.card{
  background:#fff;border:1px solid var(--c-border);border-radius:var(--radius-lg);
  padding:1.25rem;box-shadow:var(--shadow-sm);margin-bottom:1rem;
}
.card h3{margin-top:0;font-size:1.15rem;color:var(--c-text)}

/* ----- Info notices ----- */
.notice{
  padding:1rem 1.25rem;border-radius:.5rem;margin:1rem 0;border-left:4px solid;
}
.notice-info{background:#eff6ff;border-color:#3b82f6;color:#1e40af}
.notice-warning{background:#fef3c7;border-color:#f59e0b;color:#78350f}
.notice-success{background:#dcfce7;border-color:#16a34a;color:#14532d}
.notice-danger{background:#fee2e2;border-color:#dc2626;color:#7f1d1d}
.notice p:last-child{margin-bottom:0}

/* ----- Breadcrumb ----- */
.breadcrumb{
  font-size:.88rem;color:var(--c-muted);padding:.75rem 0;margin-bottom:1rem;
}
.breadcrumb a{color:var(--c-muted)}
.breadcrumb a:hover{color:var(--c-primary)}
.breadcrumb .sep{margin:0 .5rem;opacity:.5}

/* ----- Related tools / links ----- */
.related-grid{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:.75rem;margin-top:1rem;
}
.related-item{
  display:block;padding:.75rem 1rem;background:#fff;border:1px solid var(--c-border);
  border-radius:.5rem;color:var(--c-text);transition:all .2s;
}
.related-item:hover{border-color:var(--c-primary);background:var(--c-primary-light);color:var(--c-primary);text-decoration:none;transform:translateY(-1px)}
.related-item .title{font-weight:600;font-size:.95rem}
.related-item .desc{font-size:.8rem;color:var(--c-muted);margin-top:.2rem}

/* ----- FAQ ----- */
.faq-item{
  background:#fff;border:1px solid var(--c-border);border-radius:.5rem;
  margin-bottom:.5rem;overflow:hidden;
}
.faq-q{
  padding:1rem 1.25rem;font-weight:600;cursor:pointer;display:flex;
  justify-content:space-between;align-items:center;user-select:none;
}
.faq-q::after{content:"+";font-size:1.4rem;color:var(--c-primary);transition:transform .2s}
.faq-item.open .faq-q::after{transform:rotate(45deg)}
.faq-a{padding:0 1.25rem 1rem 1.25rem;color:var(--c-muted);display:none;line-height:1.7}
.faq-item.open .faq-a{display:block}

/* ----- Footer ----- */
.site-footer{
  background:#0f172a;color:#cbd5e1;padding:2.5rem 0 1rem;margin-top:3rem;font-size:.92rem;
}
.site-footer a{color:#cbd5e1}
.site-footer a:hover{color:#fff;text-decoration:underline}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:1.5rem;margin-bottom:2rem}
.footer-col h4{color:#fff;margin-bottom:.75rem;font-size:1rem}
.footer-col ul{list-style:none;padding:0}
.footer-col li{margin-bottom:.4rem}
.footer-bottom{
  border-top:1px solid #334155;padding-top:1rem;text-align:center;color:#94a3b8;font-size:.85rem;
}
.cookie-banner{
  position:fixed;bottom:0;left:0;right:0;background:#0f172a;color:#fff;padding:1rem;
  z-index:200;display:none;box-shadow:0 -4px 12px rgba(0,0,0,.15);
}
.cookie-banner.show{display:block}
.cookie-banner .container{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:.75rem}
.cookie-banner p{margin:0;font-size:.9rem;flex:1 1 200px}

/* ----- AdSense placeholder ----- */
.ad-slot{
  background:#f1f5f9;border:1px dashed #cbd5e1;border-radius:.5rem;
  padding:1rem;text-align:center;color:var(--c-muted);margin:1.25rem 0;
  min-height:90px;display:flex;align-items:center;justify-content:center;font-size:.85rem;
}

/* ----- Tool list ----- */
.tool-list{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:1rem;margin-top:1rem;
}
.tool-list-item{
  display:block;background:#fff;border:1px solid var(--c-border);border-radius:.5rem;
  padding:1rem;color:var(--c-text);transition:all .2s;
}
.tool-list-item:hover{border-color:var(--c-primary);text-decoration:none;transform:translateY(-2px);box-shadow:var(--shadow)}
.tool-list-item h4{color:var(--c-primary);font-size:1rem;margin-bottom:.3rem}
.tool-list-item p{font-size:.85rem;color:var(--c-muted);margin:0}

/* ----- Hide scrollbar, keep scrolling ----- */
.hide-scroll::-webkit-scrollbar{display:none}
.hide-scroll{scrollbar-width:none}

/* ----- Responsive ----- */
@media (max-width:480px){
  .hero h1{font-size:1.5rem}
  .tool-card{padding:1rem}
  .result-card .result-headline{font-size:1.5rem}
  .result-grid{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}

/* ----- Print ----- */
@media print{
  .site-header,.site-footer,.ad-slot,.cookie-banner,.nav-toggle,.breadcrumb{display:none!important}
  body{background:#fff}
  .tool-card,.card{box-shadow:none;border:1px solid #ddd}
}

/* ----- Accessibility ----- */
:focus-visible{outline:3px solid var(--c-primary);outline-offset:2px}
.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}
/* ===== Language switcher (UK English build) ===== */
.lang-switch{position:relative;margin-left:.5rem}
.lang-btn{background:var(--c-card);border:1px solid var(--c-border);color:var(--c-text);
  padding:.4rem .7rem;border-radius:.5rem;font-size:.9rem;cursor:pointer;font-weight:600;
  display:inline-flex;align-items:center;gap:.3rem}
.lang-btn:hover{border-color:var(--c-primary);color:var(--c-primary)}
.lang-menu{list-style:none;margin:0;padding:.3rem;position:absolute;right:0;top:calc(100% + .3rem);
  background:var(--c-card);border:1px solid var(--c-border);border-radius:.5rem;
  box-shadow:0 4px 14px rgba(0,0,0,.12);min-width:130px;display:none;z-index:50}
.lang-menu li{margin:0}
.lang-menu a{display:block;padding:.5rem .7rem;border-radius:.35rem;color:var(--c-text);
  text-decoration:none;font-size:.9rem}
.lang-menu a:hover{background:var(--c-bg);color:var(--c-primary)}
.lang-switch.open .lang-menu{display:block}
.lang-switch:hover .lang-menu{display:block}
@media(max-width:860px){.lang-switch{margin-left:auto}}

/* ==========================================================
   First-screen split layout (block/layout only)
   Desktop : description + how-to on the left, calculator on the right
   Mobile  : calculator first, description + how-to underneath
   ========================================================== */
:root{
  --maxw:1360px;       /* wider page shell so the two columns are not cramped */
  --maxw-wide:1360px;  /* first-screen shell, kept equal to --maxw so header,
                          hero and footer stay aligned on the same grid */
}
.container-wide{max-width:var(--maxw-wide)}

.hero-split{padding:1.75rem 0 2.25rem;text-align:left}
.hero-split .hero-grid{
  display:grid;
  grid-template-columns:minmax(0,5fr) minmax(0,7fr);
  grid-template-areas:"head tool" "about tool";
  align-content:start;
  column-gap:2.75rem;row-gap:1.25rem;
}
.hero-split .hero-head{grid-area:head}
.hero-split .hero-about{grid-area:about}
.hero-split .hero-tool{grid-area:tool;color:var(--c-text)}

.hero-split h1{font-size:1.85rem;line-height:1.2;margin-bottom:.55rem}
.hero-split .hero-lead{max-width:none;margin:0;font-size:1rem;opacity:.94}

/* right column: the calculator itself */
.hero-split .hero-tool .tool-card{margin:0;max-width:none;box-shadow:var(--shadow-lg)}

/* left column: what the calculator is + how to use it */
.hero-about{
  background:rgba(4,47,44,.24);
  border:1px solid rgba(255,255,255,.18);
  border-radius:var(--radius-lg);
  padding:1.1rem 1.25rem;
  color:rgba(255,255,255,.95);
}
.hero-about .content-section{margin:0 0 1.1rem}
.hero-about .content-section:last-child{margin-bottom:0}
.hero-about .content-section h2{
  font-size:1.1rem;color:#fff;border-left-color:rgba(255,255,255,.6);
  padding-left:.65rem;margin-bottom:.5rem;
}
.hero-about .content-section h3{color:#fff;font-size:1rem;margin:.75rem 0 .35rem}
.hero-about .content-section p,
.hero-about .content-section li{font-size:.94rem;line-height:1.6}
.hero-about .content-section p{margin-bottom:.55rem}
.hero-about .content-section p:last-child{margin-bottom:0}
.hero-about .content-section ul,
.hero-about .content-section ol{margin-bottom:.55rem;padding-left:1.25rem}
.hero-about .content-section li{margin-bottom:.3rem}
.hero-about a{color:#fff;text-decoration:underline}

/* pages with no short description block: give the calculator more width */
.hero-split .hero-grid.no-about{
  grid-template-columns:minmax(0,4fr) minmax(0,8fr);
  grid-template-areas:"head tool";
  align-items:center;
}

/* tablet and phone: calculator on the first screen, text below it */
@media (max-width:1023px){
  .hero-split{padding:1.1rem 0 1.5rem}
  .hero-split .hero-grid,
  .hero-split .hero-grid.no-about{
    grid-template-columns:minmax(0,1fr);
    grid-template-areas:"head" "tool" "about";
    column-gap:0;row-gap:1rem;align-items:start;
  }
  .hero-split h1{font-size:1.45rem;margin-bottom:.3rem}
  .hero-split .hero-lead{font-size:.95rem}
}
@media (max-width:480px){
  .hero-split{padding:.9rem 0 1.25rem}
  .hero-split h1{font-size:1.2rem}
  .hero-split .hero-lead{font-size:.88rem;line-height:1.5}
  .hero-split .hero-tool .tool-card{padding:1rem}
  .hero-about{padding:1rem}
}

/* ===== Capped schedule rows + recalculate button (shared) ===== */
.kl-row-hidden{display:none}
.kl-note td{
  background:#f8fafc;color:var(--c-muted);font-size:.85rem;
  text-align:center;padding:.7rem .8rem;font-weight:500;
}
.kl-recalc-bar{display:flex;justify-content:flex-end;margin:0 0 .75rem}
.kl-recalc-btn{padding:.45rem .9rem;font-size:.9rem}
@media (max-width:480px){.kl-recalc-btn{width:100%}}