:root {
    --font-display: "Anek Bangla", sans-serif;
    --font-body: "Noto Serif Bengali", serif;

    /* Palette taken from the logo */
    --brand: #0086c9;        /* logo blue: shapes, decorations */
    --brand-text: #00689f;   /* darker blue: links, buttons-outline, text (6:1 on white) */
    --dark: #2b2680;         /* logo indigo: headings, footer, dark sections */
    --tint: #e6f3fb;         /* light blue tint: backgrounds */
    --accent: #e30613;       /* logo red */
    --accent-dark: #b3050f;  /* red for small text (7:1 on white) */
    --on-accent: #fff;
    --wa: #128c4a;
    --ink: #1b1d3a;
    --muted: #4a4d6b;
    --bg: #fbfdff;
    --alt: #f1f8fd;
    --line: #d5e4f0;
    --hero-glow: #cde7f7;
    --pz-bg: #1a1650;
    --pz-card-a: #26206f;
    --pz-card-b: #14113f;
    --pz-lead: #a9dcf6;
    --pz-text: #e9eefb;
    --pz-extra: #ccd3f0;
    --pz-note: #b6bde6;
    --foot-text: #d9dcf2;
    --shadow: rgba(43, 38, 128, .08);
    --radius: 18px;
    --head-h: 68px;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: calc(var(--head-h) + 12px); }

body {
    margin: 0;
    font-family: var(--font-body);
    font-size: 1.0625rem;
    line-height: 1.8;
    letter-spacing: normal;
    color: var(--ink);
    background: var(--bg);
    -webkit-text-size-adjust: 100%;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    line-height: 1.3;
    letter-spacing: normal;
    color: var(--dark);
    margin: 0 0 .6em;
}
button, .btn, .badge, .eyebrow, .step-no, .chips li, .nav a, .foot-grid nav a,
.brand, .skip, .hero-sub, .founder-label, .foot-name, .faq summary, .avatar {
    font-family: var(--font-display);
    letter-spacing: normal;
}
h1 { font-size: clamp(2rem, 6vw, 3.4rem); }
h2 { font-size: clamp(1.5rem, 4vw, 2.2rem); }
h3 { font-size: 1.2rem; line-height: 1.3; margin: 0 0 .4em; color: var(--dark); }
p { margin: 0 0 1em; }
a { color: var(--brand-text); }
img { max-width: 100%; height: auto; }

:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; border-radius: 6px; }

.wrap { width: min(1120px, 100% - 2rem); margin-inline: auto; }
.narrow { width: min(780px, 100% - 2rem); }

.skip {
    position: absolute; left: -999px; top: 8px; background: #fff; padding: .5rem 1rem; z-index: 100;
}
.skip:focus { left: 8px; }

/* Header */
.site-header {
    position: sticky; top: 0; z-index: 50;
    background: rgba(255, 255, 255, .94);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--line);
}
.bar { display: flex; align-items: center; justify-content: space-between; min-height: var(--head-h); gap: 1rem; }
.brand { display: flex; align-items: center; gap: .6rem; text-decoration: none; color: var(--dark); font-weight: 700; }
.brand-name { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; } /* logo already shows the name; kept for screen readers */
.logo { flex: none; display: block; height: 40px; width: auto; max-width: 62vw; margin-block: 14px; }
@media (min-width: 900px) { .logo { height: 52px; margin-block: 8px; } }

.nav { display: none; }
.nav a { text-decoration: none; color: var(--ink); font-weight: 500; }
.nav a:not(.btn):hover { color: var(--brand-text); }
.nav-phone { font-weight: 600; color: var(--brand-text) !important; }

.menu-btn {
    display: inline-flex; flex-direction: column; justify-content: center; gap: 5px;
    width: 44px; height: 44px; padding: 10px; background: none; border: 1px solid var(--line);
    border-radius: 12px; cursor: pointer;
}
.menu-btn span { display: block; height: 2px; background: var(--dark); border-radius: 2px; }

.nav.open {
    display: flex; flex-direction: column; gap: .25rem;
    position: absolute; top: var(--head-h); left: 0; right: 0;
    background: #fff; padding: 1rem; border-bottom: 1px solid var(--line);
    box-shadow: 0 12px 24px var(--shadow);
}
.nav.open a { padding: .6rem .5rem; }
.nav.open .nav-cta { text-align: center; margin-top: .5rem; }

@media (min-width: 900px) {
    .menu-btn { display: none; }
    .nav { display: flex; align-items: center; gap: 1.25rem; position: static; }
    .nav-cta { padding: .55rem 1.1rem; font-size: .95rem; }
}

/* Buttons */
.btn {
    display: inline-block; padding: .8rem 1.4rem; border-radius: 999px;
    font-weight: 600; text-decoration: none; text-align: center; line-height: 1.4;
    border: 2px solid transparent; transition: transform .15s, background .15s;
}
.btn:hover { transform: translateY(-1px); }
.btn-wa { background: var(--wa); color: #fff !important; }
.btn-wa:hover { background: #0d733c; }
.btn-ghost { background: #fff; color: var(--brand-text) !important; border-color: var(--brand-text); }
.btn-outline { color: var(--brand-text) !important; border-color: var(--brand-text); }
.btn-outline:hover { background: var(--tint); }
.actions { display: flex; flex-wrap: wrap; gap: .75rem; }

/* Hero */
.hero {
    background: radial-gradient(ellipse at top right, var(--hero-glow) 0, transparent 60%), var(--tint);
    padding: clamp(3rem, 9vw, 6rem) 0;
}
.hero-inner { max-width: 760px; margin-left: max(1rem, calc((100% - 1120px) / 2)); }
.eyebrow {
    display: inline-block; background: #fff; color: var(--accent-dark); font-weight: 600;
    padding: .2rem .9rem; border-radius: 999px; border: 1px solid var(--line); margin-bottom: 1rem;
}
.hero-sub { font-size: clamp(1.15rem, 3vw, 1.5rem); font-weight: 600; color: var(--brand-text); }
.hero-text { font-size: 1.15rem; color: var(--muted); margin-bottom: 1.6rem; }

/* Sections */
.section { padding: clamp(3rem, 7vw, 5rem) 0; }
.section.alt { background: var(--alt); }
.lead { color: var(--muted); max-width: 680px; }
.grid { display: grid; gap: 1.25rem; margin-top: 1.75rem; }
@media (min-width: 760px) { .grid-3 { grid-template-columns: repeat(3, 1fr); } }

.card {
    background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
    padding: 1.5rem; box-shadow: 0 4px 16px var(--shadow);
}
.card p { color: var(--muted); }
.icon-wrap {
    display: inline-grid; place-items: center; width: 52px; height: 52px; margin-bottom: .75rem;
    border-radius: 14px; background: var(--tint); color: var(--brand-text);
}
.icon { width: 28px; height: 28px; }

.steps { list-style: none; padding: 0; }
.step-no {
    display: inline-grid; place-items: center; width: 38px; height: 38px; border-radius: 50%;
    background: var(--accent); color: var(--on-accent); font-weight: 700; margin-bottom: .6rem;
}

.chips { list-style: none; padding: 0; margin: 1.75rem 0 0; display: flex; flex-wrap: wrap; gap: .6rem; }
.chips li {
    padding: .3rem 1rem; border-radius: 999px; background: #fff; border: 1px dashed var(--brand-text);
    color: var(--dark); font-size: .95rem;
}

/* Private Zone */
.pz { background: var(--pz-bg); }
.pz-card {
    max-width: 860px; padding: clamp(1.5rem, 5vw, 3rem); border-radius: 24px; color: var(--pz-text);
    border: 1px solid rgba(0, 134, 201, .6);
    background: linear-gradient(160deg, var(--pz-card-a), var(--pz-card-b));
}
.pz h2 { color: #fff; }
.pz-lead { font-size: 1.15rem; color: var(--pz-lead); }
.badge {
    display: inline-block; margin-bottom: 1rem; padding: .2rem 1rem; border-radius: 999px;
    background: var(--accent); color: var(--on-accent); font-weight: 700; font-size: .9rem;
}
.pz-steps { padding-left: 1.3rem; }
.pz-steps li { margin-bottom: .5rem; }
.pz-extra { color: var(--pz-extra); }
.pz-note { margin: 1.5rem 0 0; font-size: .9rem; color: var(--pz-note); }

/* About */
.about { display: grid; gap: 2rem; align-items: start; }
@media (min-width: 800px) { .about { grid-template-columns: 1.3fr 1fr; } }
.founder { text-align: center; }
.founder img, .avatar { width: 120px; height: 120px; border-radius: 50%; object-fit: cover; margin-bottom: .75rem; }
.avatar {
    display: inline-grid; place-items: center; background: var(--brand-text); color: #fff;
    font-size: 3rem;
}
.founder-label { color: var(--accent-dark) !important; font-weight: 600; margin-bottom: .2em; }
.creds { font-size: .9rem; line-height: 1.6; }

/* FAQ */
.faq { background: #fff; border: 1px solid var(--line); border-radius: 14px; margin-bottom: .75rem; }
.faq summary { cursor: pointer; padding: 1rem 1.25rem; font-weight: 600; color: var(--dark); }
.faq p { padding: 0 1.25rem; margin: 0 0 1rem; color: var(--muted); }

/* Contact */
.contact-list { list-style: none; padding: 0; margin: 0 0 1.5rem; }
.contact-list li { margin-bottom: .5rem; }

/* Footer */
.site-footer { background: var(--dark); color: var(--foot-text); padding: 2.5rem 0 5.5rem; }
.site-footer a { color: #fff; }
.foot-grid { display: grid; gap: 1.5rem; }
@media (min-width: 760px) { .foot-grid { grid-template-columns: 2fr 1fr; } }
.foot-grid nav { display: flex; flex-direction: column; gap: .3rem; }
.foot-logo { display: inline-block; background: #fff; border-radius: 14px; padding: .6rem 1rem; margin-bottom: 1rem; }
.foot-logo img { display: block; height: 48px; width: auto; max-width: 100%; }
.foot-name { font-weight: 700; font-size: 1.2rem; color: #fff; margin-bottom: .2em; }
.social { display: flex; gap: 1rem; }
.copy { margin-top: 1.5rem; padding-top: 1rem; border-top: 1px solid rgba(255, 255, 255, .2); font-size: .9rem; }

/* Floating buttons */
.float-btns { position: fixed; right: 14px; bottom: 14px; display: flex; flex-direction: column; gap: 10px; z-index: 60; }
.fab {
    display: grid; place-items: center; width: 54px; height: 54px; border-radius: 50%;
    box-shadow: 0 6px 18px rgba(0, 0, 0, .25); color: #fff;
}
.fab svg { width: 28px; height: 28px; fill: currentColor; }
.fab-wa { background: var(--wa); }
.fab-call { background: var(--brand-text); }

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { transition: none !important; animation: none !important; }
}