:root {
    --blue-900: #1d4ed8;
    --blue-600: #2f6fed;
    --blue-500: #3b82f6;
    --teal-500: #0ea5a3;
    --green-500: #22c55e;
    --green-600: #16a34a;

    --gradient-brand: linear-gradient(90deg, var(--blue-900) 0%, var(--teal-500) 55%, var(--green-500) 100%);
    --gradient-soft: linear-gradient(135deg, rgba(47, 111, 237, .08), rgba(34, 197, 94, .08));

    --ink-900: #0f172a;
    --ink-700: #334155;
    --ink-500: #64748b;
    --ink-300: #cbd5e1;
    --paper: #ffffff;
    --paper-alt: #f5f8fc;
    --border: #e6ebf2;

    --shadow-sm: 0 2px 8px rgba(15, 23, 42, .06);
    --shadow-md: 0 12px 30px rgba(15, 23, 42, .09);
    --shadow-lg: 0 24px 60px rgba(15, 23, 42, .14);

    --radius: 20px;
    --font-bn: 'Hind Siliguri', 'Poppins', sans-serif;
    --font-en: 'Poppins', 'Hind Siliguri', sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    margin: 0;
    font-family: var(--font-bn);
    color: var(--ink-700);
    background: var(--paper);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

a { color: inherit; text-decoration: none; }

.container {
    max-width: 1180px;
    margin: 0 auto;
    padding: 0 20px;
}

.skip-link {
    position: absolute;
    left: -999px;
    top: 0;
    background: var(--blue-900);
    color: #fff;
    padding: 10px 16px;
    z-index: 999;
    border-radius: 0 0 10px 0;
}
.skip-link:focus { left: 0; }

h1, h2, h3, h4 {
    font-family: var(--font-bn);
    color: var(--ink-900);
    line-height: 1.3;
    margin: 0 0 16px;
}

h1 { font-size: clamp(2rem, 4vw, 2.9rem); font-weight: 700; }
h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); font-weight: 700; }
h3 { font-size: 1.15rem; font-weight: 600; }

p { margin: 0 0 14px; color: var(--ink-500); }

.text-gradient {
    background: var(--gradient-brand);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 22px;
    border-radius: 999px;
    font-weight: 600;
    font-size: .95rem;
    border: none;
    cursor: pointer;
    transition: transform .18s ease, box-shadow .18s ease, opacity .18s ease;
    white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }
.btn-lg { padding: 15px 28px; font-size: 1rem; }
.btn-sm { padding: 9px 18px; font-size: .85rem; }
.btn-block { width: 100%; }

.btn-gradient {
    background: var(--gradient-brand);
    color: #fff;
    box-shadow: 0 10px 24px rgba(14, 165, 163, .28);
}
.btn-gradient:hover { box-shadow: 0 14px 30px rgba(14, 165, 163, .38); }

.btn-outline {
    background: #fff;
    color: var(--ink-900);
    border: 1.5px solid var(--border);
}
.btn-outline:hover { border-color: var(--teal-500); color: var(--teal-500); }

/* ---------- Header ---------- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, .75);
    -webkit-backdrop-filter: saturate(180%) blur(18px);
    backdrop-filter: saturate(180%) blur(18px);
    border-bottom: 1px solid rgba(230, 235, 242, .8);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 12px 20px;
}

.brand-logo { height: 42px; width: auto; }

.main-nav {
    display: flex;
    align-items: center;
    gap: 28px;
}

.nav-link {
    font-weight: 500;
    color: var(--ink-700);
    font-size: .95rem;
    position: relative;
    padding: 6px 0;
}
.nav-link::after {
    content: '';
    position: absolute;
    left: 0; bottom: 0;
    width: 0; height: 2px;
    background: var(--gradient-brand);
    transition: width .2s ease;
}
.nav-link:hover::after, .nav-link.active::after { width: 100%; }
.nav-link:hover { color: var(--ink-900); }

.header-actions { display: flex; align-items: center; gap: 14px; }

.header-phone {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    color: var(--ink-900);
    font-size: .95rem;
}
.header-phone i { color: var(--green-600); }

.nav-toggle {
    display: none;
    background: var(--paper-alt);
    border: 1px solid var(--border);
    width: 42px;
    height: 42px;
    border-radius: 12px;
    font-size: 1.2rem;
    color: var(--ink-900);
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

/* Mobile nav */
.mobile-nav-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, .45);
    z-index: 199;
    opacity: 0;
    pointer-events: none;
    transition: opacity .25s ease;
}
.mobile-nav-backdrop.active { opacity: 1; pointer-events: auto; }

.mobile-nav {
    position: fixed;
    top: 0; right: 0;
    height: 100%;
    width: min(320px, 85vw);
    background: #fff;
    z-index: 200;
    box-shadow: var(--shadow-lg);
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    transform: translateX(100%);
    transition: transform .3s ease;
}
.mobile-nav.active { transform: translateX(0); }

.mobile-nav-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border);
}
.mobile-nav-logo { height: 34px; }

.nav-close {
    background: var(--paper-alt);
    border: none;
    width: 36px; height: 36px;
    border-radius: 10px;
    cursor: pointer;
    font-size: 1rem;
}

.mobile-nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 13px 10px;
    border-radius: 12px;
    font-weight: 500;
    color: var(--ink-700);
}
.mobile-nav-link i { color: var(--teal-500); width: 20px; text-align: center; }
.mobile-nav-link:hover { background: var(--paper-alt); }

.mobile-nav-cta { margin-top: 14px; }

/* ---------- Hero ---------- */
.hero {
    position: relative;
    overflow: hidden;
    padding: 72px 0 90px;
    background: linear-gradient(180deg, #f5f9ff 0%, #ffffff 70%);
}

.hero-blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
    opacity: .35;
    z-index: 0;
}
.blob-1 { width: 420px; height: 420px; background: var(--blue-500); top: -180px; right: -120px; }
.blob-2 { width: 380px; height: 380px; background: var(--green-500); bottom: -200px; left: -140px; opacity: .25; }

.hero-inner {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1.1fr .9fr;
    gap: 50px;
    align-items: center;
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: #fff;
    border: 1px solid var(--border);
    padding: 8px 16px;
    border-radius: 999px;
    font-size: .85rem;
    font-weight: 600;
    color: var(--teal-500);
    box-shadow: var(--shadow-sm);
    margin-bottom: 20px;
}

.hero-desc { font-size: 1.05rem; max-width: 540px; }

.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; margin: 26px 0 24px; }

.hero-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 18px;
    font-size: .88rem;
    font-weight: 500;
    color: var(--ink-700);
}
.hero-tags i { color: var(--green-600); margin-right: 4px; }

.hero-visual {
    position: relative;
    height: 420px;
}

.hero-card {
    position: absolute;
    background: #fff;
    border-radius: 22px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border);
}

.main-card {
    width: 240px;
    height: 240px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--gradient-brand);
    color: #fff;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 14px;
    z-index: 2;
}
.main-card i { font-size: 4rem; }
.hero-card-label { font-weight: 600; font-size: .95rem; }

.pulse-dot {
    position: absolute;
    top: 18px; right: 18px;
    width: 12px; height: 12px;
    background: #fff;
    border-radius: 50%;
    box-shadow: 0 0 0 0 rgba(255,255,255,.7);
    animation: pulse 1.8s infinite;
}
@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(255,255,255,.6); }
    70% { box-shadow: 0 0 0 12px rgba(255,255,255,0); }
    100% { box-shadow: 0 0 0 0 rgba(255,255,255,0); }
}

.float-card {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 18px;
    font-size: .85rem;
    font-weight: 600;
    color: var(--ink-900);
    animation: floaty 5s ease-in-out infinite;
}
.float-card i { font-size: 1.3rem; color: var(--teal-500); }

.card-1 { top: 6%; left: 0; animation-delay: 0s; }
.card-2 { bottom: 10%; right: 0; animation-delay: 1.2s; max-width: 220px; }
.card-3 { top: 8%; right: 4%; animation-delay: 2.2s; }

@keyframes floaty {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

/* ---------- Trust strip ---------- */
.trust-strip {
    background: var(--ink-900);
    padding: 22px 0;
}
.trust-inner {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 16px;
}
.trust-item {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #e2e8f0;
    font-weight: 600;
    font-size: .9rem;
}
.trust-item i { color: var(--green-500); font-size: 1.1rem; }

/* ---------- Sections ---------- */
.section { padding: 90px 0; }
.section-alt { background: var(--paper-alt); }

.section-head { max-width: 640px; margin: 0 auto 48px; text-align: center; }
.section-head p { font-size: 1rem; }

.section-tag {
    display: inline-block;
    color: var(--teal-500);
    font-weight: 700;
    font-size: .85rem;
    letter-spacing: .04em;
    margin-bottom: 10px;
}

/* About */
.about-grid {
    display: grid;
    grid-template-columns: .8fr 1.2fr;
    gap: 60px;
    align-items: center;
}
.about-visual { position: relative; }
.about-frame {
    background: var(--gradient-brand);
    border-radius: 28px;
    aspect-ratio: 1 / 1;
    max-width: 380px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
}
.about-frame i { font-size: 7rem; color: #fff; opacity: .92; }

.about-badge {
    position: absolute;
    bottom: -24px;
    right: -10px;
    background: #fff;
    border-radius: 18px;
    box-shadow: var(--shadow-md);
    padding: 14px 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    border: 1px solid var(--border);
}
.about-badge i { font-size: 1.8rem; color: var(--blue-600); }
.about-badge div { display: flex; flex-direction: column; line-height: 1.2; }
.about-badge strong { font-family: var(--font-en); color: var(--ink-900); font-size: 1rem; }
.about-badge span { font-size: .75rem; color: var(--ink-500); }

.spin-slow { animation: spin 8s linear infinite; display: inline-block; }
@keyframes spin { to { transform: rotate(360deg); } }

.about-list { list-style: none; margin: 20px 0 0; padding: 0; display: flex; flex-direction: column; gap: 12px; }
.about-list li { display: flex; align-items: flex-start; gap: 10px; font-weight: 500; color: var(--ink-700); }
.about-list i { color: var(--green-600); margin-top: 3px; }

/* Grids */
.grid { display: grid; gap: 24px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.product-card, .service-card, .why-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 30px 26px;
    transition: transform .2s ease, box-shadow .2s ease;
}
.product-card:hover, .service-card:hover, .why-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
}

.product-icon, .service-icon {
    width: 56px; height: 56px;
    border-radius: 16px;
    background: var(--gradient-soft);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 18px;
}
.product-icon i, .service-icon i {
    font-size: 1.5rem;
    background: var(--gradient-brand);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.why-card { text-align: center; }
.why-card i {
    font-size: 2.2rem;
    background: var(--gradient-brand);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    margin-bottom: 14px;
    display: inline-block;
}

/* Process */
.process-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.process-step {
    background: #fff;
    border-radius: var(--radius);
    padding: 30px 24px;
    border: 1px solid var(--border);
    position: relative;
}
.process-num {
    font-family: var(--font-en);
    font-size: 2rem;
    font-weight: 800;
    background: var(--gradient-brand);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    margin-bottom: 10px;
}

/* Contact */
.contact-grid {
    display: grid;
    grid-template-columns: .85fr 1.15fr;
    gap: 40px;
    align-items: start;
}
.contact-info { display: flex; flex-direction: column; gap: 14px; }
.contact-item {
    display: flex;
    align-items: center;
    gap: 16px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 16px 18px;
    transition: transform .2s ease, box-shadow .2s ease;
}
a.contact-item:hover { transform: translateY(-3px); box-shadow: var(--shadow-sm); }
.contact-item span { display: block; font-size: .8rem; color: var(--ink-500); }
.contact-item strong { font-size: 1rem; color: var(--ink-900); }
.contact-icon {
    width: 46px; height: 46px;
    border-radius: 12px;
    background: var(--gradient-soft);
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0;
}
.contact-icon i {
    font-size: 1.2rem;
    background: var(--gradient-brand);
    -webkit-background-clip: text; background-clip: text; color: transparent;
}
.contact-icon.whatsapp i { background: none; color: #25d366; -webkit-text-fill-color: #25d366; }

.map-frame {
    margin-top: 6px;
    border-radius: 18px;
    overflow: hidden;
    border: 1px solid var(--border);
    position: relative;
    box-shadow: var(--shadow-sm);
}
.map-frame iframe { width: 100%; height: 260px; border: 0; display: block; }
.map-link {
    display: flex;
    align-items: center;
    gap: 8px;
    justify-content: center;
    padding: 12px;
    background: #fff;
    font-weight: 600;
    font-size: .85rem;
    color: var(--teal-500);
    border-top: 1px solid var(--border);
}

.contact-form {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 34px;
    box-shadow: var(--shadow-sm);
}
.form-row { margin-bottom: 18px; }
.form-row label { display: block; font-weight: 600; font-size: .88rem; color: var(--ink-900); margin-bottom: 8px; }
.form-row input, .form-row textarea {
    width: 100%;
    padding: 12px 14px;
    border-radius: 12px;
    border: 1.5px solid var(--border);
    font-family: var(--font-bn);
    font-size: .95rem;
    color: var(--ink-900);
    background: var(--paper-alt);
    resize: vertical;
}
.form-row input:focus, .form-row textarea:focus {
    outline: none;
    border-color: var(--teal-500);
    background: #fff;
}
.form-note { font-size: .78rem; color: var(--ink-500); text-align: center; margin: 14px 0 0; }

/* ---------- Footer ---------- */
.site-footer { background: var(--ink-900); color: #cbd5e1; padding-top: 60px; }
.footer-inner {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
}
.footer-logo { height: 40px; margin-bottom: 14px; filter: brightness(0) invert(1); }
.footer-brand p { color: #94a3b8; font-size: .9rem; max-width: 320px; }
.footer-links h4, .footer-contact h4 { color: #fff; font-size: 1rem; margin-bottom: 16px; }
.footer-links a, .footer-contact a {
    display: flex;
    align-items: center;
    gap: 8px;
    color: #94a3b8;
    font-size: .9rem;
    margin-bottom: 12px;
}
.footer-links a:hover, .footer-contact a:hover { color: #fff; }

.footer-bottom { border-top: 1px solid rgba(255,255,255,.1); padding: 18px 0; }
.footer-bottom-inner {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 10px;
    font-size: .82rem;
    color: #64748b;
}
.footer-bottom-inner a { color: #64748b; }
.footer-bottom-inner a:hover { color: #fff; }

/* ---------- Floating buttons ---------- */
.whatsapp-float {
    position: fixed;
    bottom: 24px;
    left: 24px;
    width: 58px;
    height: 58px;
    background: #25d366;
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.7rem;
    box-shadow: 0 10px 24px rgba(37, 211, 102, .45);
    z-index: 90;
    animation: floaty 4s ease-in-out infinite;
}

.back-to-top {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--gradient-brand);
    color: #fff;
    border: none;
    font-size: 1.2rem;
    box-shadow: var(--shadow-md);
    cursor: pointer;
    z-index: 90;
    opacity: 0;
    pointer-events: none;
    transform: translateY(10px);
    transition: opacity .25s ease, transform .25s ease;
}
.back-to-top.visible { opacity: 1; pointer-events: auto; transform: translateY(0); }

/* ---------- Reveal animation (progressively enhanced; .no-js / JS-fails keeps content visible) ---------- */
.js .reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity .6s ease, transform .6s ease;
}
.js .reveal.in-view { opacity: 1; transform: translateY(0); }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
    .about-grid, .contact-grid { grid-template-columns: 1fr; }
    .about-visual { max-width: 320px; margin: 0 auto 50px; }
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .process-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 900px) {
    .main-nav, .header-phone, .header-actions .btn { display: none; }
    .nav-toggle { display: flex; }
    .hero-inner { grid-template-columns: 1fr; }
    .hero-visual { height: 340px; margin-top: 20px; }
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
    .footer-inner { grid-template-columns: 1fr 1fr; }
    .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 640px) {
    .hero { padding: 50px 0 70px; }
    .section { padding: 60px 0; }
    .grid-3, .grid-4, .process-grid { grid-template-columns: 1fr; }
    .trust-inner { justify-content: flex-start; }
    .footer-inner { grid-template-columns: 1fr; }
    .contact-form { padding: 24px; }
    .card-2 { max-width: 180px; font-size: .78rem; }
    .header-inner { padding: 10px 16px; }
    .brand-logo { height: 34px; }
}