/* Layout: letterhead-style portrait hero on charcoal, then alternating charcoal and ivory bands; gold is used only for rules, numbers and calls to action. */
:root {
  --ink: #0f1416;        /* page charcoal, slight green-blue bias */
  --ink-2: #161e21;      /* raised dark surface */
  --ink-3: #1f2a2e;      /* dark borders */
  --ivory: #f4efe4;      /* light band */
  --ivory-2: #e9e1d0;    /* light borders */
  --text: #ece6d8;       /* text on dark */
  --text-dim: #a5aca6;   /* secondary text on dark */
  --type: #1b2124;       /* text on ivory */
  --type-dim: #5b625e;   /* secondary text on ivory */
  --gold: #c8a25a;
  --gold-hi: #e0c27f;
  --emerald: #1d4a3c;
  --wa: #1f9d55;
  --serif-bn: "Noto Serif Bengali", "Hind Siliguri", serif;
  --serif-en: "Marcellus", "Noto Serif Bengali", Georgia, serif;
  --sans: "Hind Siliguri", system-ui, -apple-system, "Segoe UI", sans-serif;
  --wrap: 1200px;
  --gutter: clamp(16px, 4vw, 48px);
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body { margin: 0; background: var(--ink); color: var(--text); font: 400 17px/1.75 var(--sans); }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--gold-hi); text-underline-offset: 4px; }
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible, summary:focus-visible { outline: 2px solid var(--gold-hi); outline-offset: 3px; }
h1, h2, h3 { font-family: var(--serif-bn); font-weight: 600; line-height: 1.3; text-wrap: balance; margin: 0; }
h1 { font-size: clamp(2.3rem, 5.6vw, 4.4rem); font-weight: 700; line-height: 1.2; }
h2 { font-size: clamp(1.7rem, 3.4vw, 2.6rem); }
h3 { font-size: 1.25rem; }
p { margin: 0; }
.en { font-family: var(--serif-en); letter-spacing: .02em; }
.wrap { max-width: var(--wrap); margin-inline: auto; padding-inline: var(--gutter); }
.kicker { font: 500 .92rem/1.3 var(--sans); letter-spacing: .02em; color: var(--gold); display: flex; align-items: center; gap: 14px; }
.kicker::before { content: ""; width: 36px; height: 1px; background: currentColor; flex: none; }
.lead { font-size: 1.12rem; color: var(--text-dim); max-width: 62ch; }
.num { font-variant-numeric: tabular-nums; }
.skip { position: absolute; left: -999px; top: 0; background: var(--gold); color: var(--ink); padding: 8px 14px; z-index: 99; }
.skip:focus { left: 8px; }

/* Header */
.site-head { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 50; background: rgb(15 20 22 / .86); backdrop-filter: blur(12px); border-bottom: 1px solid var(--ink-3); }
.site-head .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 72px; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; color: var(--text); }
.brand .mono { width: 42px; height: 42px; flex: none; border: 1px solid var(--gold); display: grid; place-items: center; font: 400 1.05rem/1 var(--serif-en); color: var(--gold-hi); letter-spacing: .04em; }
.brand b { display: block; font: 600 1.08rem/1.25 var(--serif-bn); }
.brand small { display: block; font: 400 .72rem/1.3 var(--serif-en); color: var(--text-dim); letter-spacing: .14em; text-transform: uppercase; }
.nav { display: flex; align-items: center; gap: 2px; }
.nav a { text-decoration: none; color: var(--text); font-weight: 500; padding: 8px 14px; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--gold-hi); }
.nav .btn { margin-left: 10px; }
.menu-btn { display: none; background: none; border: 1px solid var(--ink-3); padding: 8px 12px; color: var(--text); font: 500 .95rem var(--sans); }
@media (max-width: 900px) {
  .menu-btn { display: inline-flex; }
  .nav { position: absolute; inset: 72px 0 auto 0; flex-direction: column; align-items: stretch; background: var(--ink); border-bottom: 1px solid var(--ink-3); padding: 8px var(--gutter) 18px; display: none; }
  .nav.open { display: flex; }
  .nav a { padding: 12px 0; border-bottom: 1px solid var(--ink-3); }
  .nav .btn { margin: 14px 0 0; justify-content: center; border-bottom: 0; }
}

/* Buttons */
.btn { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font: 600 1rem/1 var(--sans); padding: 15px 24px; border: 1px solid transparent; cursor: pointer; transition: background .2s ease, color .2s ease, border-color .2s ease; }
.btn svg { width: 19px; height: 19px; flex: none; }
.btn-gold { background: var(--gold); color: #17140c; }
.btn-gold:hover { background: var(--gold-hi); }
.btn-line { border-color: var(--gold); color: var(--gold-hi); background: transparent; }
.btn-line:hover { background: rgb(200 162 90 / .1); }
.btn-wa { background: var(--wa); color: #fff; }
.btn-sm { padding: 11px 16px; font-size: .92rem; }

/* Hero */
.hero { position: relative; overflow: hidden; border-bottom: 1px solid var(--ink-3); background: radial-gradient(120% 90% at 85% 10%, #1b2a2a 0%, var(--ink) 60%); }
.hero .wrap { display: grid; grid-template-columns: 1.15fr .85fr; gap: clamp(32px, 5vw, 72px); align-items: center; padding-block: clamp(48px, 7vw, 96px); }
.hero-text { display: grid; gap: 22px; min-width: 0; }
.hero h1 { color: #fff; }
.hero .en-name { font: 400 clamp(1rem, 1.6vw, 1.25rem)/1.3 var(--serif-en); letter-spacing: .3em; text-transform: uppercase; color: var(--gold); }
.roles { list-style: none; padding: 0; margin: 6px 0 0; display: grid; gap: 0; border-top: 1px solid var(--ink-3); }
.roles li { display: grid; grid-template-columns: 150px 1fr; gap: 16px; padding: 14px 0; border-bottom: 1px solid var(--ink-3); align-items: baseline; }
.roles span { font-size: .9rem; color: var(--gold); }
.roles b { font: 600 1.15rem/1.4 var(--serif-bn); color: var(--text); }
.roles b small { display: block; font: 400 .9rem/1.4 var(--sans); color: var(--text-dim); }
@media (max-width: 520px) { .roles li { grid-template-columns: 1fr; gap: 2px; } }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 8px; }
.portrait { margin: 0; justify-self: center; width: min(100%, 420px); display: grid; gap: 14px; }
.portrait .frame { position: relative; padding: 12px; border: 1px solid var(--gold); }
.portrait picture { display: block; }
.portrait img { width: 100%; aspect-ratio: 4 / 5; object-fit: cover; object-position: 50% 30%; }
.portrait figcaption { text-align: center; font-size: .92rem; color: var(--text-dim); }
@media (max-width: 900px) { .hero .wrap { grid-template-columns: 1fr; } .portrait { width: min(88%, 380px); order: -1; } }

/* Figures strip */
.figures { background: var(--ink-2); border-bottom: 1px solid var(--ink-3); }
.figures dl { margin: 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); }
.figures div { padding: 26px 20px; border-right: 1px solid var(--ink-3); display: grid; gap: 4px; }
.figures div:last-child { border-right: 0; }
.figures dt { font-size: .88rem; color: var(--text-dim); order: 2; }
.figures dd { margin: 0; font: 600 clamp(1.5rem, 2.6vw, 2.1rem)/1.2 var(--serif-bn); color: var(--gold-hi); font-variant-numeric: tabular-nums; }
@media (max-width: 760px) { .figures dl { grid-template-columns: repeat(2, minmax(0, 1fr)); } .figures div:nth-child(2) { border-right: 0; } .figures div:nth-child(-n+2) { border-bottom: 1px solid var(--ink-3); } }

/* Sections */
.section { padding-block: clamp(64px, 9vw, 112px); }
.head { display: grid; gap: 14px; margin-bottom: clamp(32px, 4vw, 48px); max-width: 760px; }
.light { background: var(--ivory); color: var(--type); }
.light .lead, .light .dim { color: var(--type-dim); }
.light .kicker { color: #9a7631; }
.light a { color: var(--emerald); }

/* Message */
.message { display: grid; grid-template-columns: .9fr 1.1fr; gap: clamp(32px, 6vw, 80px); align-items: start; }
.message blockquote { margin: 0; font: 500 clamp(1.35rem, 2.4vw, 1.75rem)/1.6 var(--serif-bn); color: var(--type); position: relative; padding-top: 34px; }
.message blockquote::before { content: "“"; position: absolute; top: -18px; left: -4px; font: 400 5rem/1 var(--serif-en); color: #b8914a; }
.message .body { display: grid; gap: 16px; color: var(--type-dim); }
.signature { margin-top: 8px; display: grid; gap: 2px; }
.signature b { font: 600 1.15rem var(--serif-bn); color: var(--type); }
@media (max-width: 860px) { .message { grid-template-columns: 1fr; } }

/* Companies */
.companies { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
.plaque { border: 1px solid var(--ink-3); background: linear-gradient(160deg, var(--ink-2), var(--ink)); padding: clamp(24px, 3.4vw, 40px); display: grid; gap: 12px; align-content: start; position: relative; }
.plaque::after { content: ""; position: absolute; left: 0; top: 0; width: 64px; height: 2px; background: var(--gold); }
.plaque .role { font-size: .9rem; color: var(--gold); }
.plaque h3 { font-size: clamp(1.4rem, 2.4vw, 1.9rem); }
.plaque .sub { color: var(--text-dim); font-size: .95rem; }
.plaque p { color: var(--text-dim); }
@media (max-width: 760px) { .companies { grid-template-columns: 1fr; } }

/* Projects */
.projects { display: grid; gap: 28px; }
.project { display: grid; grid-template-columns: 1.2fr 1fr; background: var(--ink-2); border: 1px solid var(--ink-3); min-width: 0; }
.project:nth-child(even) .p-img { order: 2; }
.p-img { position: relative; min-height: 320px; background: var(--ink-3); overflow: hidden; }
.p-img img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: transform .6s ease; }
.project:hover .p-img img { transform: scale(1.03); }
.p-tag { position: absolute; z-index: 1; left: 16px; top: 16px; background: var(--gold); color: #17140c; font: 600 .82rem/1 var(--sans); padding: 8px 12px; }
.p-body { padding: clamp(24px, 3.4vw, 44px); display: grid; gap: 14px; align-content: center; min-width: 0; }
.p-body .no { font: 400 .8rem var(--serif-en); letter-spacing: .24em; color: var(--gold); text-transform: uppercase; }
.p-body h3 { font-size: clamp(1.6rem, 2.8vw, 2.2rem); }
.p-body .loc { color: var(--text-dim); display: flex; gap: 8px; align-items: flex-start; }
.p-body .loc svg { width: 16px; height: 16px; margin-top: 7px; color: var(--gold); flex: none; }
.p-specs { list-style: none; padding: 0; margin: 4px 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--ink-3); border-left: 1px solid var(--ink-3); }
.p-specs li { padding: 10px 12px; border-right: 1px solid var(--ink-3); border-bottom: 1px solid var(--ink-3); display: grid; }
.p-specs small { font-size: .78rem; color: var(--text-dim); }
.p-specs b { font: 600 1.05rem/1.3 var(--serif-bn); }
.p-price { display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 14px; }
.p-price b { font: 600 1.9rem/1.1 var(--serif-bn); color: var(--gold-hi); }
.p-price span { color: var(--text-dim); font-size: .95rem; }
.p-acts { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 6px; }
@media (max-width: 860px) { .project { grid-template-columns: 1fr; } .project:nth-child(even) .p-img { order: 0; } .p-img { min-height: 0; aspect-ratio: 16 / 10; } }
@media (max-width: 420px) { .p-specs { grid-template-columns: repeat(2, minmax(0, 1fr)); } }

/* Comparison ledger */
.ledger { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(32px, 5vw, 64px); align-items: center; }
.ledger-table { border-top: 2px solid var(--type); }
.lrow { display: flex; justify-content: space-between; gap: 16px; padding: 16px 0; border-bottom: 1px solid var(--ivory-2); font-variant-numeric: tabular-nums; }
.lrow span { color: var(--type-dim); }
.lrow b { font: 600 1.1rem var(--serif-bn); text-align: right; }
.lrow.total b { color: var(--emerald); font-size: 1.4rem; }
.lrow.strike b { color: #9b3b2a; text-decoration: line-through; }
@media (max-width: 860px) { .ledger { grid-template-columns: 1fr; } }

/* Steps */
.steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0; border-top: 1px solid var(--ink-3); counter-reset: s; }
.steps li { counter-increment: s; padding: 28px 24px 8px 0; display: grid; gap: 8px; align-content: start; }
.steps li + li { padding-left: 24px; border-left: 1px solid var(--ink-3); }
.steps li::before { content: "০" counter(s, bengali); font: 600 2.2rem/1 var(--serif-bn); color: var(--gold); }
.steps p { color: var(--text-dim); font-size: .98rem; }
@media (max-width: 900px) { .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); } .steps li:nth-child(3) { padding-left: 0; border-left: 0; } }
@media (max-width: 520px) { .steps { grid-template-columns: 1fr; } .steps li + li { padding-left: 0; border-left: 0; border-top: 1px solid var(--ink-3); } }

/* Expat band */
.band { background: var(--emerald); }
.band .wrap { display: grid; grid-template-columns: 1.3fr 1fr; gap: 40px; align-items: center; padding-block: clamp(56px, 7vw, 88px); }
.band p { color: rgb(236 230 216 / .85); }
.band ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 10px; }
.band li { padding-left: 26px; position: relative; }
.band li::before { content: ""; position: absolute; left: 0; top: 13px; width: 14px; height: 1px; background: var(--gold-hi); }
@media (max-width: 860px) { .band .wrap { grid-template-columns: 1fr; } }

/* FAQ */
.faq { display: grid; max-width: 860px; border-top: 1px solid var(--ivory-2); }
.faq details { border-bottom: 1px solid var(--ivory-2); }
.faq summary { cursor: pointer; font: 600 1.1rem/1.5 var(--serif-bn); padding: 20px 0; list-style: none; display: flex; justify-content: space-between; gap: 20px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font: 400 1.6rem/1 var(--serif-en); color: #9a7631; }
.faq details[open] summary::after { content: "−"; }
.faq details p { padding-bottom: 20px; color: var(--type-dim); max-width: 70ch; }

/* Project detail page */
.crumbs { font-size: .9rem; color: var(--text-dim); padding-block: 20px 0; }
.crumbs ol { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; padding: 0; margin: 0; }
.crumbs li + li::before { content: "/"; margin-right: 8px; color: var(--ink-3); }
.crumbs a { color: var(--text-dim); }
.d-hero { display: grid; grid-template-columns: 1.3fr 1fr; gap: clamp(28px, 4vw, 56px); padding-block: 28px 64px; align-items: start; }
.d-hero figure { margin: 0; }
.d-hero figure img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; border: 1px solid var(--ink-3); }
.d-hero figcaption { font-size: .82rem; color: var(--text-dim); padding-top: 8px; }
.d-info { display: grid; gap: 18px; position: sticky; top: calc(env(safe-area-inset-top, 0px) + 96px); }
.price-card { border: 1px solid var(--gold); padding: 22px; display: grid; gap: 12px; background: var(--ink-2); }
.price-card .big { font: 600 2.3rem/1.1 var(--serif-bn); color: var(--gold-hi); font-variant-numeric: tabular-nums; }
.price-card .big small { font: 400 1rem var(--sans); color: var(--text-dim); }
.price-card p { color: var(--text-dim); }
@media (max-width: 900px) { .d-hero { grid-template-columns: 1fr; } .d-info { position: static; } }
.facts { margin: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 180px), 1fr)); border-top: 1px solid var(--ivory-2); border-left: 1px solid var(--ivory-2); }
.facts div { padding: 18px 20px; border-right: 1px solid var(--ivory-2); border-bottom: 1px solid var(--ivory-2); }
.facts dt { font-size: .86rem; color: var(--type-dim); }
.facts dd { margin: 4px 0 0; font: 600 1.15rem/1.4 var(--serif-bn); }
.two { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(32px, 5vw, 64px); }
@media (max-width: 860px) { .two { grid-template-columns: 1fr; } }
.ticks { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.ticks li { padding-left: 28px; position: relative; }
.ticks li::before { content: ""; position: absolute; left: 0; top: 9px; width: 12px; height: 12px; border: 1px solid var(--gold); transform: rotate(45deg); }
.gallery { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 260px), 1fr)); gap: 16px; }
.gallery a { display: block; overflow: hidden; border: 1px solid var(--ivory-2); background: #fff; }
.gallery img { width: 100%; aspect-ratio: 4 / 5; object-fit: cover; transition: transform .4s ease; }
.gallery a:hover img { transform: scale(1.03); }
.note { font-size: .92rem; color: var(--type-dim); border-left: 2px solid #b8914a; padding-left: 14px; }

/* Profile page */
.profile { display: grid; grid-template-columns: .8fr 1.2fr; gap: clamp(32px, 6vw, 80px); align-items: start; }
.profile .body { display: grid; gap: 18px; }
@media (max-width: 860px) { .profile { grid-template-columns: 1fr; } }

/* Contact */
.contact { display: grid; grid-template-columns: 1fr 1.15fr; gap: clamp(32px, 5vw, 64px); align-items: start; }
.clist { list-style: none; padding: 0; margin: 0; display: grid; border-top: 1px solid var(--ink-3); }
.clist li { padding: 18px 0; border-bottom: 1px solid var(--ink-3); display: grid; gap: 2px; }
.clist span { font-size: .86rem; color: var(--gold); }
.clist b { font: 600 1.15rem/1.45 var(--serif-bn); }
.clist a { color: var(--text); }
.form { border: 1px solid var(--ink-3); background: var(--ink-2); padding: clamp(22px, 3vw, 36px); display: grid; gap: 16px; }
.form label { display: grid; gap: 6px; font-weight: 500; font-size: .95rem; }
.form input, .form select, .form textarea { font: 400 1rem var(--sans); padding: 13px 14px; border: 1px solid var(--ink-3); background: var(--ink); color: var(--text); width: 100%; border-radius: 0; }
.form .row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form small { color: var(--text-dim); }
@media (max-width: 860px) { .contact { grid-template-columns: 1fr; } }
@media (max-width: 520px) { .form .row { grid-template-columns: 1fr; } }

/* CTA + footer */
.cta { border-top: 1px solid var(--ink-3); background: linear-gradient(120deg, var(--ink-2), var(--ink)); }
.cta .wrap { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 24px; padding-block: 48px; }
.cta h2 { font-size: clamp(1.4rem, 2.8vw, 2rem); max-width: 28ch; }
.site-foot { background: #0a0e0f; color: var(--text-dim); padding-block: 56px 100px; font-size: .95rem; border-top: 1px solid var(--ink-3); }
.site-foot .wrap { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 36px; }
.site-foot h3 { color: var(--text); font-size: 1rem; margin-bottom: 12px; }
.site-foot a { color: var(--text); }
.site-foot ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.site-foot .legal { grid-column: 1 / -1; border-top: 1px solid var(--ink-3); padding-top: 22px; font-size: .85rem; }
@media (max-width: 760px) { .site-foot .wrap { grid-template-columns: 1fr; } }

/* Floating contact */
.float-wa { position: fixed; right: 20px; bottom: calc(20px + env(safe-area-inset-bottom, 0px)); z-index: 60; width: 58px; height: 58px; border-radius: 50%; background: var(--wa); color: #fff; display: grid; place-items: center; box-shadow: 0 6px 20px rgb(0 0 0 / .4); }
.float-wa svg { width: 30px; height: 30px; }
.mbar { display: none; }
@media (max-width: 720px) {
  .float-wa { display: none; }
  .mbar { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; position: fixed; left: 0; right: 0; bottom: 0; z-index: 60; padding: 10px 12px calc(10px + env(safe-area-inset-bottom, 0px)); background: rgb(15 20 22 / .96); border-top: 1px solid var(--ink-3); }
  .mbar .btn { justify-content: center; padding: 13px 10px; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; scroll-behavior: auto !important; } }
.social { display: flex; flex-wrap: wrap; gap: 10px 22px; margin-top: 18px; }
.social a { color: var(--gold-hi); text-decoration: none; border-bottom: 1px solid rgb(200 162 90 / .4); padding-bottom: 2px; font-family: var(--sans); }
.social a:hover { border-color: var(--gold-hi); }