:root {
  --paper: #F3F5F1;
  --surface: #FFFFFF;
  --ink: #12261F;
  --muted: #4E6159;
  --line: #D5DDD7;
  --green: #0E6B55;
  --green-soft: #DCEFE7;
  --on-green: #FFFFFF;
  --amber: #B86E00;
  --logo-amber: #E39B1B;
  --amber-soft: #FBEBCF;
  --deep: #0F2A23;
  --deep-fg: #EAF2EE;
  --deep-muted: #A9C2B8;
  --deep-caller: #8FD9C1;
  --red: #B3261E;
  --nav-bg: rgba(243, 245, 241, 0.88);
  --display: "Bricolage Grotesque", "Segoe UI", system-ui, sans-serif;
  --body: "Hind Siliguri", "Noto Sans Bengali", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, Menlo, monospace;
}
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) {
  --paper: #0D1915; --surface: #14231E; --ink: #E6EEEA; --muted: #9DB2A9; --line: #29403A;
  --green: #4CC3A0; --green-soft: #173A30; --on-green: #062019; --amber: #F2B04A; --logo-amber: #F2B04A; --amber-soft: #3A2C12;
  --deep: #081310; --deep-fg: #EAF2EE; --deep-muted: #93AEA4; --deep-caller: #8FD9C1; --red: #F07A70;
  --nav-bg: rgba(13, 25, 21, 0.88); color-scheme: dark; } }
:root[data-theme="dark"] {
  --paper: #0D1915; --surface: #14231E; --ink: #E6EEEA; --muted: #9DB2A9; --line: #29403A;
  --green: #4CC3A0; --green-soft: #173A30; --on-green: #062019; --amber: #F2B04A; --logo-amber: #F2B04A; --amber-soft: #3A2C12;
  --deep: #081310; --deep-fg: #EAF2EE; --deep-muted: #93AEA4; --deep-caller: #8FD9C1; --red: #F07A70;
  --nav-bg: rgba(13, 25, 21, 0.88); color-scheme: dark; }

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body { background: var(--paper); color: var(--ink); font-family: var(--body); font-size: 16.5px; line-height: 1.6; margin: 0; }
.wrap { max-width: 1120px; margin: 0 auto; padding-inline: 20px; }
section { padding-block: 72px; }
h1, h2, h3 { font-family: var(--display); line-height: 1.1; text-wrap: balance; margin: 0; }
h2 { font-size: clamp(1.8rem, 3.6vw, 2.6rem); font-weight: 700; letter-spacing: -0.01em; }
h3 { font-size: 1.15rem; font-weight: 700; }
p { margin: 0; }
a { color: var(--green); }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 2px solid var(--green); outline-offset: 3px; border-radius: 4px; }
.eyebrow { font-family: var(--mono); font-size: 0.75rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); }
.lede { color: var(--muted); max-width: 62ch; font-size: 1.08rem; }
.head-block { display: grid; gap: 12px; }

/* Nav */
.nav { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 20; background: var(--nav-bg); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.nav .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 60px; }
.logo { display: flex; align-items: center; text-decoration: none; }
.logo-svg { display: block; height: 46px; width: auto; }
.foot-logo { flex-basis: 100%; }
.foot-logo .logo-svg { height: 34px; }
.nav ul { list-style: none; margin: 0; padding: 0; display: flex; gap: 4px; align-items: center; }
.nav ul a { display: block; padding: 8px 12px; text-decoration: none; color: var(--ink); font-size: 0.95rem; border-radius: 6px; }
.nav ul a:hover { background: var(--green-soft); }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 11px 20px; border-radius: 6px; font-family: var(--display); font-weight: 700; font-size: 0.98rem; text-decoration: none; border: 1.5px solid var(--green); transition: transform .15s ease; }
.btn:hover { transform: translateY(-1px); }
.btn.primary { background: var(--green); color: var(--on-green); }
.btn.ghost { background: transparent; color: var(--green); }
.nav .btn { padding: 8px 16px; font-size: 0.9rem; }
.menu-btn { display: none; background: none; border: 1px solid var(--line); color: var(--ink); border-radius: 6px; padding: 7px 12px; font: 600 0.9rem var(--body); cursor: pointer; }
@media (max-width: 980px) {
  .menu-btn { display: inline-block; }
  .nav ul { display: none; position: absolute; left: 0; right: 0; top: 100%; background: var(--paper); border-bottom: 1px solid var(--line); flex-direction: column; align-items: stretch; padding: 8px 16px 16px; }
  .nav.open ul { display: flex; }
  .nav ul a { padding: 12px; }
}

/* Hero */
.hero { padding-block: 64px 48px; }
.hero h1 { font-size: clamp(2.6rem, 7.4vw, 5.4rem); font-weight: 800; letter-spacing: -0.03em; max-width: 14ch; }
.hero h1 em { font-style: normal; color: var(--green); }
.hero .lede { margin-top: 20px; }
.ctas { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.wave { margin-top: 44px; width: 100%; height: 96px; display: block; }
.wave rect { fill: var(--green); transform-box: fill-box; transform-origin: center; }
.wave rect.ai { fill: var(--amber); }
@media (prefers-reduced-motion: no-preference) { .wave rect { animation: pulse 2.6s ease-in-out infinite; } }
@keyframes pulse { 0%, 100% { transform: scaleY(1); } 50% { transform: scaleY(0.72); } }
.wave-key { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-top: 10px; font-family: var(--mono); font-size: 0.75rem; letter-spacing: 0.08em; text-transform: uppercase; }
.wave-key .v { color: var(--green); }
.wave-key .a { color: var(--amber); }
.facts { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 28px; }
.facts span { font-family: var(--mono); font-size: 0.78rem; color: var(--muted); border: 1px solid var(--line); border-radius: 99px; padding: 4px 12px; }

/* Products */
.layers { margin-top: 32px; display: grid; gap: 8px; }
.layer { border-radius: 6px; padding: 16px 18px; display: grid; grid-template-columns: 10.5em minmax(0, 1fr); gap: 8px 16px; align-items: center; }
.layer .lt { font-family: var(--display); font-weight: 700; line-height: 1.2; }
.layer .lt small { display: block; font-family: var(--mono); font-weight: 500; font-size: 0.68rem; letter-spacing: 0.1em; text-transform: uppercase; opacity: 0.85; }
.layer .chips { display: flex; flex-wrap: wrap; gap: 6px; }
.layer .chips span { font-size: 0.85rem; padding: 3px 10px; border-radius: 99px; background: var(--surface); border: 1px solid var(--line); }
.layer.ai-l { background: var(--amber-soft); }
.layer.ai-l .lt { color: var(--amber); }
.layer.base-l { background: var(--green-soft); }
.layer.base-l .lt { color: var(--green); }
@media (max-width: 600px) { .layer { grid-template-columns: minmax(0, 1fr); } }
.products { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; margin-top: 28px; }
.product { background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 28px; display: grid; gap: 16px; align-content: start; min-width: 0; }
.product .tag { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; padding: 4px 10px; border-radius: 99px; justify-self: start; }
.product.voice .tag { background: var(--green-soft); color: var(--green); }
.product.ai .tag { background: var(--amber-soft); color: var(--amber); }
.product h3 { font-size: 1.8rem; font-weight: 800; }
.product.voice h3 span { color: var(--green); }
.product.ai h3 span { color: var(--amber); }
.product ul { margin: 0; padding-left: 1.1em; display: grid; gap: 6px; }
.product .for { font-size: 0.92rem; color: var(--muted); border-top: 1px solid var(--line); padding-top: 14px; }

/* Moving call dot */
.flow .dot-call { fill: var(--green); }
.flow .dot-ai { fill: var(--amber); }

/* Flow */
.flow-box { margin-top: 28px; overflow-x: auto; }
.flow { width: 100%; min-width: 640px; height: auto; display: block; }
.flow .n rect { fill: var(--surface); stroke: var(--line); stroke-width: 1.5; }
.flow .n.ai rect { fill: var(--amber-soft); stroke: var(--amber); }
.flow .n.hu rect { fill: var(--green-soft); stroke: var(--green); }
.flow .t1 { font-family: var(--display); font-weight: 700; font-size: 15px; fill: var(--ink); }
.flow .t2 { font-family: var(--body); font-size: 12px; fill: var(--muted); }
.flow .ar { stroke: var(--muted); stroke-width: 1.6; fill: none; }
.flow .ar.to-ai { stroke: var(--amber); }
.flow .ar.take { stroke: var(--amber); stroke-dasharray: 5 4; }
.flow .ah { fill: var(--muted); }
.flow .ah.a { fill: var(--amber); }
.flow .lbl { font-family: var(--mono); font-size: 11px; fill: var(--amber); letter-spacing: 0.04em; }
.flow .step { font-family: var(--mono); font-size: 11px; fill: var(--muted); }
.flow-legend { display: flex; flex-wrap: wrap; gap: 8px 24px; margin-top: 14px; font-size: 0.88rem; color: var(--muted); }
.flow-legend i { display: inline-block; width: 22px; border-top: 2px solid var(--muted); vertical-align: middle; margin-right: 8px; }
.flow-legend i.a { border-color: var(--amber); }
.flow-legend i.d { border-top-style: dashed; border-color: var(--amber); }

/* AI */
.ai-sec { background: var(--deep); color: var(--deep-fg); }
.ai-sec .eyebrow { color: var(--amber); }
.ai-sec .lede { color: var(--deep-muted); }
.ai-layout { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 40px; margin-top: 36px; align-items: start; }
.ai-list { display: grid; gap: 22px; }
.ai-list div { display: grid; gap: 4px; }
.ai-list p { color: var(--deep-muted); font-size: 0.97rem; }
.transcript { background: color-mix(in srgb, var(--deep-fg) 6%, var(--deep)); border: 1px solid color-mix(in srgb, var(--deep-fg) 16%, transparent); border-radius: 8px; padding: 20px; font-size: 0.93rem; display: grid; gap: 12px; min-width: 0; }
.transcript .head { display: flex; justify-content: space-between; gap: 10px; flex-wrap: wrap; font-family: var(--mono); font-size: 0.72rem; color: var(--deep-muted); letter-spacing: 0.06em; text-transform: uppercase; }
.transcript .live { color: var(--amber); }
.line { display: grid; grid-template-columns: 4.2em minmax(0, 1fr); gap: 10px; }
.line .t { font-family: var(--mono); font-size: 0.75rem; color: var(--deep-muted); padding-top: 3px; font-variant-numeric: tabular-nums; }
.line b { font-weight: 600; color: var(--amber); }
.line.caller b { color: var(--deep-caller); }
.line.sys { color: var(--deep-muted); font-style: italic; }
.transcript .foot { border-top: 1px dashed color-mix(in srgb, var(--deep-fg) 20%, transparent); padding-top: 12px; font-size: 0.85rem; color: var(--deep-muted); }
.sample { font-family: var(--mono); font-size: 0.7rem; color: var(--deep-muted); }
@media (max-width: 800px) { .ai-layout { grid-template-columns: minmax(0, 1fr); } }

/* Compare */
.tbl { overflow-x: auto; margin-top: 32px; border: 1px solid var(--line); border-radius: 8px; background: var(--surface); }
table { border-collapse: collapse; width: 100%; min-width: 520px; font-size: 0.97rem; }
th, td { padding: 12px 18px; text-align: left; border-bottom: 1px solid var(--line); }
thead th { font-family: var(--display); font-size: 1rem; }
th.c, td.c { text-align: center; width: 9.5em; }
thead th.v { color: var(--green); }
thead th.a { color: var(--amber); }
td.c { font-weight: 600; }
td.yes::before { content: "●"; }
td.v.yes { color: var(--green); }
td.a.yes { color: var(--amber); }
td.no::before { content: "–"; color: var(--muted); }
tr:last-child td { border-bottom: 0; }
tr.split td { border-top: 2px solid var(--line); }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* FAQ */
.faq { margin-top: 28px; border-top: 1px solid var(--line); max-width: 820px; }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { cursor: pointer; padding: 18px 0; font-family: var(--display); font-weight: 700; font-size: 1.08rem; list-style: none; display: flex; justify-content: space-between; gap: 16px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-family: var(--mono); color: var(--green); }
.faq details[open] summary::after { content: "–"; }
.faq details p { padding-bottom: 18px; color: var(--muted); max-width: 68ch; }

/* Contact */
.contact { background: var(--green-soft); }
.contact .wrap { display: grid; gap: 18px; }
.contact h2 span { color: var(--green); }
.web { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 20px; margin-top: 8px; }
.web .url { font-family: var(--display); font-weight: 800; font-size: clamp(1.6rem, 4vw, 2.4rem); color: var(--green); text-decoration: none; }
.web .url:hover { text-decoration: underline; }
footer { padding-block: 28px; border-top: 1px solid var(--line); }
footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 10px 24px; font-size: 0.88rem; color: var(--muted); }


/* Features */
.feats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0; margin-top: 36px; border-top: 1px solid var(--line); }
@media (max-width: 900px) { .feats { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { .feats { grid-template-columns: minmax(0, 1fr); } }
.feat { padding: 26px 24px 28px 0; border-bottom: 1px solid var(--line); display: grid; gap: 10px; align-content: start; min-width: 0; }
.feat .k { font-family: var(--mono); font-size: 0.72rem; color: var(--green); letter-spacing: 0.08em; text-transform: uppercase; }
.feat p { color: var(--muted); font-size: 0.97rem; }
.ico { width: 40px; height: 40px; border-radius: 10px; display: grid; place-items: center; background: var(--green-soft); color: var(--green); }
.ico svg { width: 22px; height: 22px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

/* Old vs modern call center illustration */
.story { padding-top: 24px; }
.story-grid { display: grid; grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr); gap: 12px 20px; align-items: start; margin-top: 32px; }
.scene { margin: 0; display: contents; }
.scene.old svg, .scene.old figcaption { grid-column: 1; }
.scene.new svg, .scene.new figcaption { grid-column: 3; }
.scene svg { grid-row: 1; }
.scene figcaption { grid-row: 2; }
.story-arrow { grid-column: 2; grid-row: 1; align-self: center; }
.scene svg { width: 100%; height: auto; display: block; }
.scene figcaption { color: var(--muted); font-size: 0.97rem; }
.scene figcaption b { color: var(--ink); }
.story-arrow svg { width: 56px; height: 56px; display: block; }
@media (max-width: 760px) {
  .story-grid { grid-template-columns: minmax(0, 1fr); }
  .scene.old svg, .scene.old figcaption, .scene.new svg, .scene.new figcaption, .story-arrow { grid-column: 1; grid-row: auto; }
  .story-arrow { justify-self: center; transform: rotate(90deg); }
}
.scene svg * { transform-box: fill-box; }
@media (prefers-reduced-motion: no-preference) {
  .s-spin { transform-origin: 50% 93%; animation: s-spin 1.2s linear infinite; }
  .s-badge { transform-origin: center; animation: s-pop 1s ease-in-out infinite; }
  .s-badge.d2 { animation-delay: .25s; } .s-badge.d3 { animation-delay: .5s; }
  .s-drop { animation: s-drop 1.8s ease-in infinite; }
  .s-ring { transform-origin: 50% 100%; animation: s-shake .5s ease-in-out infinite; }
  .s-wave { animation: s-fade 1s ease-in-out infinite; }
  .s-fly { animation: s-fly 3.5s ease-in-out infinite; }
  .s-bob { animation: s-bob 2.4s ease-in-out infinite; }
  .s-blink, .s-eyes { transform-origin: center; animation: s-blink 4s infinite; }
  .s-bar { transform-origin: 50% 100%; animation: s-grow 2.4s ease-in-out infinite; }
  .s-bar.b2 { animation-delay: .3s; } .s-bar.b3 { animation-delay: .6s; } .s-bar.b4 { animation-delay: .9s; }
  .s-check { transform-origin: center; animation: s-check 1.6s ease-out infinite; }
  .s-sway { transform-origin: 50% 100%; animation: s-sway 3s ease-in-out infinite; }
  .s-spark { transform-origin: center; animation: s-twinkle 2s ease-in-out infinite; }
  .s-spark.d2 { animation-delay: 1s; }
  .story-arrow svg { animation: s-nudge 1.6s ease-in-out infinite; }
}
@media (prefers-reduced-motion: reduce) { .s-call { display: none; } }
@keyframes s-spin { to { transform: rotate(360deg); } }
@keyframes s-pop { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.35); } }
@keyframes s-drop { 0% { transform: translateY(0); opacity: 0; } 20% { opacity: 1; } 100% { transform: translateY(40px); opacity: 0; } }
@keyframes s-shake { 0%, 100% { transform: rotate(0); } 25% { transform: rotate(-6deg); } 75% { transform: rotate(6deg); } }
@keyframes s-fade { 0%, 100% { opacity: 0.15; } 50% { opacity: 1; } }
@keyframes s-fly { 0% { transform: translate(0, 0) rotate(0); opacity: 0; } 15% { opacity: 1; } 100% { transform: translate(-30px, -150px) rotate(-30deg); opacity: 0; } }
@keyframes s-bob { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }
@keyframes s-blink { 0%, 92%, 100% { transform: scaleY(1); } 95% { transform: scaleY(0.1); } }
@keyframes s-grow { 0%, 100% { transform: scaleY(0.6); } 50% { transform: scaleY(1); } }
@keyframes s-check { 0% { transform: scale(0); } 30% { transform: scale(1.2); } 45%, 100% { transform: scale(1); } }
@keyframes s-sway { 0%, 100% { transform: rotate(-4deg); } 50% { transform: rotate(4deg); } }
@keyframes s-twinkle { 0%, 100% { transform: scale(0.6) rotate(0); opacity: 0.4; } 50% { transform: scale(1.1) rotate(20deg); opacity: 1; } }
@keyframes s-nudge { 0%, 100% { transform: translateX(0); } 50% { transform: translateX(6px); } }

.tbl { position: relative; }
.up-grid .product.up .tag { background: var(--line); color: var(--ink); }
.product.up h3 span { color: var(--muted); }
.product.up .sub { font-weight: 700; margin-top: -8px; }
.contact .wa { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 16px; margin-top: 18px; }
.wa-k { font-family: var(--mono); font-size: 0.75rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); }
.wa-num { font-weight: 700; font-size: 1.15rem; user-select: all; }
.wa-btn, .wa-float { background: #1f9d55; color: #fff; text-decoration: none; font-weight: 700; border-radius: 99px; }
.wa-btn { padding: 10px 20px; }
.wa-btn:hover, .wa-btn:focus-visible, .wa-float:hover, .wa-float:focus-visible { background: #17834a; }
.wa-float { position: fixed; right: 16px; bottom: 16px; z-index: 50; display: flex; align-items: center; gap: 8px; padding: 12px 18px; box-shadow: 0 6px 20px rgba(0,0,0,.18); }
.wa-float svg { width: 22px; height: 22px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
@media (max-width: 560px) { .wa-float span { display: none; } .wa-float { padding: 14px; } }
@media print { .wa-float { display: none; } }