/* Layout: SaaS landing. Sticky header, hero split (copy + tool card), stacked bands, shared footer.
   Palette: deep tea-leaf green + turmeric highlight on a cool off-white; mint-tinted neutrals. */
:root{
  --bg:#f5f7f6; --bg2:#eaf1ee; --surface:#ffffff; --ink:#14201b; --muted:#56655e; --line:#dbe3df;
  --accent:#0d6e55; --accent-2:#0a5643; --accent-ink:#ffffff; --accent-soft:#e1f1ea;
  --hi:#f2b631; --hi-soft:#fdf1d3; --warn:#a4501b; --warn-soft:#fbeee4;
  --shadow:0 1px 2px rgba(20,32,27,.06),0 8px 24px rgba(20,32,27,.06);
  --display:"Hind Siliguri","Noto Sans Bengali",system-ui,sans-serif;
  --serif:"Tiro Bangla","Noto Serif Bengali",serif;
  --body:"Hind Siliguri","Noto Sans Bengali",system-ui,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,Menlo,monospace;
  --r:12px;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#0f1513; --bg2:#141d19; --surface:#18211d; --ink:#e6ede9; --muted:#9aaba3; --line:#29352f;
  --accent:#36b88d; --accent-2:#5fd0a8; --accent-ink:#08130f; --accent-soft:#1a3129;
  --hi:#f2b631; --hi-soft:#3a2f12; --warn:#e8935a; --warn-soft:#33241a;
  --shadow:0 1px 2px rgba(0,0,0,.3),0 8px 24px rgba(0,0,0,.25); color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#0f1513; --bg2:#141d19; --surface:#18211d; --ink:#e6ede9; --muted:#9aaba3; --line:#29352f;
  --accent:#36b88d; --accent-2:#5fd0a8; --accent-ink:#08130f; --accent-soft:#1a3129;
  --hi:#f2b631; --hi-soft:#3a2f12; --warn:#e8935a; --warn-soft:#33241a;
  --shadow:0 1px 2px rgba(0,0,0,.3),0 8px 24px rgba(0,0,0,.25); color-scheme:dark}

*{box-sizing:border-box}
[hidden]{display:none!important}
html{scroll-behavior:smooth}
html,body{margin:0}
body{background:var(--bg);color:var(--ink);font:16px/1.7 var(--body);-webkit-font-smoothing:antialiased}
a{color:var(--accent)}
img{max-width:100%}
.container{max-width:1120px;margin:0 auto;padding-left:max(18px,env(safe-area-inset-left,0px));padding-right:max(18px,env(safe-area-inset-right,0px))}
.narrow{max-width:780px}
h1,h2,h3{font-family:var(--display);line-height:1.25;text-wrap:balance;margin:0}
h1{font-size:clamp(2rem,4.6vw,3.3rem);font-weight:700;letter-spacing:-.01em}
h2{font-size:clamp(1.55rem,3vw,2.2rem);font-weight:700}
h3{font-size:1.12rem;font-weight:600}
p{margin:0}
.lead{font-size:1.1rem;color:var(--muted);max-width:60ch}
.eyebrow{align-self:flex-start;display:inline-flex;align-items:center;gap:8px;font-size:.85rem;font-weight:600;color:var(--accent);background:var(--accent-soft);border-radius:999px;padding:4px 12px}
.mark{background:linear-gradient(transparent 58%,var(--hi-soft) 58%);font-family:var(--serif);font-weight:400;padding:0 .1em}
.muted{color:var(--muted)}
.small{font-size:.88rem}

/* header */
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);z-index:30;background:var(--surface)}
.site-header{position:sticky;top:env(safe-area-inset-top,0px);z-index:20;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.site-header .container{display:flex;align-items:center;gap:18px;min-height:62px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-weight:700;font-size:1.1rem;white-space:nowrap}
.brand-mark{width:34px;height:34px;border-radius:9px;background:var(--accent);color:var(--accent-ink);display:grid;place-items:center;font-family:var(--serif);font-size:1.2rem}
.nav{display:flex;gap:4px;margin-left:auto;align-items:center}
.nav a{color:var(--muted);text-decoration:none;padding:6px 10px;border-radius:8px;font-weight:500}
.nav a:hover,.nav a[aria-current="page"]{color:var(--ink);background:var(--bg2)}
.btn.nav-toggle{display:none;margin-left:auto}
.key-pill{display:inline-flex;align-items:center;gap:7px;font:inherit;font-size:.9rem;font-weight:600;border:1px solid var(--line);background:var(--surface);color:var(--ink);border-radius:999px;padding:6px 13px;cursor:pointer}
.key-pill .dot{width:8px;height:8px;border-radius:50%;background:var(--warn)}
.key-pill.ok .dot{background:var(--accent)}
@media (max-width:860px){
  .nav{display:none;position:absolute;top:62px;left:0;right:0;flex-direction:column;align-items:stretch;background:var(--surface);border-bottom:1px solid var(--line);padding:10px max(18px,env(safe-area-inset-right,0px)) 14px max(18px,env(safe-area-inset-left,0px))}
  .nav.open{display:flex}
  .btn.nav-toggle{display:inline-flex}
  .site-header .key-pill{margin-left:0}
}

/* buttons & inputs */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font:inherit;font-weight:600;border:1px solid var(--accent);background:var(--accent);color:var(--accent-ink);border-radius:10px;padding:10px 18px;cursor:pointer;text-decoration:none;transition:background .15s,transform .1s}
.btn:hover{background:var(--accent-2);border-color:var(--accent-2)}
.btn:active{transform:translateY(1px)}
.btn.ghost{background:transparent;color:var(--accent)}
.btn.ghost:hover{background:var(--accent-soft)}
.btn.sm{padding:7px 12px;font-size:.92rem;border-radius:8px}
.btn.lg{padding:13px 24px;font-size:1.05rem}
.btn:disabled{opacity:.55;cursor:wait}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
input,select,textarea{font:inherit;color:var(--ink);background:var(--bg);border:1px solid var(--line);border-radius:9px;padding:10px 12px;width:100%}
textarea{min-height:120px;resize:vertical}
label{font-weight:600;font-size:.95rem}
.field{display:flex;flex-direction:column;gap:6px;min-width:0}
.row{display:flex;gap:12px;flex-wrap:wrap;align-items:flex-end}
.row>.field{flex:1 1 200px}
.check{display:flex;gap:8px;align-items:center;font-weight:400}
.check input{width:auto}

/* cards / tool */
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow)}
.tool{padding:20px;display:flex;flex-direction:column;gap:14px}
.seg{display:inline-flex;background:var(--bg2);border-radius:9px;padding:3px;gap:2px;flex-wrap:wrap}
.seg button{font:inherit;font-weight:500;border:none;background:transparent;color:var(--muted);border-radius:7px;padding:6px 12px;cursor:pointer}
.seg button[aria-pressed="true"]{background:var(--surface);color:var(--ink);box-shadow:0 1px 2px rgba(0,0,0,.08)}
.hint{color:var(--muted);font-size:.86rem}
.status{font-size:.92rem;padding:9px 12px;border-radius:9px;background:var(--accent-soft)}
.status.err{background:var(--warn-soft);color:var(--warn)}
.spinner{width:15px;height:15px;border-radius:50%;border:2px solid currentColor;border-right-color:transparent;display:inline-block;animation:spin .8s linear infinite;vertical-align:-2px;margin-right:6px}
@keyframes spin{to{transform:rotate(360deg)}}

/* result panel */
.result{display:flex;flex-direction:column;gap:0;overflow:hidden}
.result-head{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap;padding:12px 16px;border-bottom:1px solid var(--line)}
.tabs{display:flex;gap:2px;flex-wrap:wrap}
.tabs button{font:inherit;font-weight:500;border:none;background:transparent;color:var(--muted);border-bottom:2px solid transparent;padding:6px 10px;cursor:pointer}
.tabs button[aria-selected="true"]{color:var(--ink);border-bottom-color:var(--accent)}
.tabs .pro{font-size:.7rem;background:var(--hi-soft);color:var(--ink);border-radius:4px;padding:0 5px;margin-left:4px}
.out{white-space:pre-wrap;word-break:break-word;padding:16px;min-height:120px;max-height:560px;overflow:auto;font-size:1rem}
.out .ln{display:flex;gap:12px}
.out .t{font-family:var(--mono);font-size:.82rem;color:var(--accent);min-width:46px;padding-top:3px}
.result-foot{display:flex;gap:8px;flex-wrap:wrap;padding:12px 16px;border-top:1px solid var(--line);background:var(--bg2)}

/* sections */
section.band{padding-block:72px}
section.band.alt{background:var(--bg2)}
.section-head{display:flex;flex-direction:column;gap:12px;margin-bottom:34px;max-width:680px}
.section-head.center{margin-inline:auto;text-align:center;align-items:center}
.section-head.center .eyebrow{align-self:center}
.hero{padding-block:56px 64px;background:radial-gradient(1200px 400px at 85% -10%,var(--accent-soft),transparent 60%),radial-gradient(800px 300px at 0% 0%,var(--hi-soft),transparent 60%)}
.hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center}
.hero-copy{display:flex;flex-direction:column;gap:18px;min-width:0}
.platforms{display:flex;flex-wrap:wrap;gap:8px}
.chip{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--line);background:var(--surface);border-radius:999px;padding:4px 11px;font-size:.88rem;font-weight:500}
.chip .ok{width:7px;height:7px;border-radius:50%;background:var(--accent)}
.chip .part{width:7px;height:7px;border-radius:50%;background:var(--hi)}
@media (max-width:900px){.hero-grid{grid-template-columns:1fr}}

.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
@media (max-width:900px){.grid3,.grid4{grid-template-columns:repeat(2,1fr)}}
@media (max-width:560px){.grid3,.grid4{grid-template-columns:1fr}}
.step{padding:22px;display:flex;flex-direction:column;gap:10px}
.step .n{font-family:var(--mono);font-size:.85rem;color:var(--accent);font-weight:600}
.feature{padding:22px;display:flex;flex-direction:column;gap:10px;text-decoration:none;color:inherit;transition:border-color .15s,transform .15s}
a.feature:hover{border-color:var(--accent);transform:translateY(-2px)}
.feature .ico{width:40px;height:40px;border-radius:10px;background:var(--accent-soft);color:var(--accent);display:grid;place-items:center}
.feature .go{margin-top:auto;font-weight:600;color:var(--accent);font-size:.93rem}

/* demo */
.demo{display:grid;grid-template-columns:260px 1fr;min-height:360px;overflow:hidden}
.demo-list{border-right:1px solid var(--line);display:flex;flex-direction:column}
.demo-list button{font:inherit;text-align:left;border:none;border-bottom:1px solid var(--line);background:transparent;color:var(--ink);padding:14px 16px;cursor:pointer;display:flex;flex-direction:column;gap:2px}
.demo-list button[aria-pressed="true"]{background:var(--accent-soft)}
.demo-list .meta{font-size:.82rem;color:var(--muted)}
.demo-main{min-width:0;display:flex;flex-direction:column}
@media (max-width:760px){.demo{grid-template-columns:1fr}.demo-list{border-right:none;border-bottom:1px solid var(--line);flex-direction:row;overflow-x:auto}.demo-list button{border-bottom:none;border-right:1px solid var(--line);min-width:190px}}

/* roles */
.roles{display:grid;grid-template-columns:240px 1fr;gap:24px}
.role-list{display:flex;flex-direction:column;gap:6px}
.role-list button{font:inherit;font-weight:500;text-align:left;border:1px solid var(--line);background:var(--surface);color:var(--ink);border-radius:10px;padding:11px 14px;cursor:pointer}
.role-list button[aria-pressed="true"]{border-color:var(--accent);background:var(--accent-soft)}
.role-body{padding:26px;display:grid;grid-template-columns:1fr 1fr;gap:22px}
.role-body .lbl{font-size:.78rem;letter-spacing:.06em;text-transform:uppercase;font-weight:700;color:var(--muted);margin-bottom:6px}
@media (max-width:760px){.roles{grid-template-columns:1fr}.role-list{flex-direction:row;overflow-x:auto}.role-list button{white-space:nowrap}.role-body{grid-template-columns:1fr}}

/* table */
.table-wrap{overflow-x:auto}
table{border-collapse:collapse;width:100%;min-width:520px;font-size:.95rem}
th,td{text-align:left;padding:12px 14px;border-bottom:1px solid var(--line);vertical-align:top}
th{font-weight:600;color:var(--muted);font-size:.86rem}
td.yes{color:var(--accent);font-weight:600}
td.part{color:var(--warn);font-weight:600}

/* faq */
.faq{display:flex;flex-direction:column;gap:10px}
.faq details{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:0 18px}
.faq summary{cursor:pointer;font-weight:600;padding:15px 0;list-style:none;display:flex;justify-content:space-between;gap:10px}
.faq summary::after{content:"+";color:var(--accent);font-weight:700}
.faq details[open] summary::after{content:"–"}
.faq details p{padding-bottom:16px;color:var(--muted)}

/* cta */
.cta{padding:40px;display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap;background:var(--accent);color:var(--accent-ink);border-radius:16px}
.cta p{opacity:.85}
.cta .btn{background:var(--accent-ink);color:var(--accent);border-color:var(--accent-ink)}

/* page head */
.page-head{padding-block:48px 28px;display:flex;flex-direction:column;gap:12px}
.crumb{font-size:.88rem;color:var(--muted)}
.crumb a{color:var(--muted)}
.tool-page{display:grid;grid-template-columns:1fr 1fr;gap:22px;align-items:start;padding-bottom:64px}
@media (max-width:900px){.tool-page{grid-template-columns:1fr}}
.prose{display:flex;flex-direction:column;gap:14px;max-width:68ch}
.prose ol,.prose ul{margin:0;padding-left:1.3em;display:flex;flex-direction:column;gap:6px}
.prose h2{margin-top:18px}
.callout{padding:16px 18px;border-radius:10px;background:var(--hi-soft);border:1px solid color-mix(in srgb,var(--hi) 40%,transparent)}

/* history */
.hist{display:flex;flex-direction:column;gap:12px}
.hist-item{padding:16px 18px;display:flex;flex-direction:column;gap:8px}
.hist-item .top{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;align-items:baseline}
.hist-item .snip{color:var(--muted);font-size:.93rem;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.empty{padding:40px;text-align:center;color:var(--muted)}

/* modal */
dialog{border:none;border-radius:14px;padding:0;max-width:520px;width:calc(100% - 32px);background:var(--surface);color:var(--ink);box-shadow:0 20px 60px rgba(0,0,0,.3)}
dialog::backdrop{background:rgba(10,20,16,.5)}
.modal{padding:24px;display:flex;flex-direction:column;gap:14px}
.modal-head{display:flex;justify-content:space-between;align-items:center}
.x{font:inherit;font-size:1.4rem;line-height:1;border:none;background:transparent;color:var(--muted);cursor:pointer;padding:4px 8px}
.steps-mini{margin:0;padding-left:1.2em;color:var(--muted);font-size:.93rem}

/* footer */
.site-footer{border-top:1px solid var(--line);padding-block:44px 30px;background:var(--surface)}
.foot-grid{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:26px}
.foot-grid h4{margin:0 0 10px;font-size:.8rem;letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.foot-grid ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:6px}
.foot-grid a{color:var(--ink);text-decoration:none;font-size:.95rem}
.foot-grid a:hover{color:var(--accent)}
.foot-bottom{margin-top:30px;padding-top:18px;border-top:1px solid var(--line);display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:.86rem;color:var(--muted)}
@media (max-width:760px){.foot-grid{grid-template-columns:1fr 1fr}}

.toast{position:fixed;left:50%;bottom:calc(20px + env(safe-area-inset-bottom,0px));transform:translateX(-50%);background:var(--ink);color:var(--bg);padding:10px 16px;border-radius:10px;font-weight:500;z-index:50;box-shadow:var(--shadow)}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}