/* HelloSheba — লোগোর রঙ অনুসারে থিম */
:root {
    --blue-dark: #0b3fb0;
    --blue: #0b5ed7;
    --blue-light: #2f80ff;
    --red: #e01a2b;
    --red-dark: #b3121f;
    --ink: #0f172a;
    --muted: #5b6b82;
    --line: #e3e9f2;
    --bg: #f5f8fd;
    --white: #ffffff;
    --radius: 16px;
    --shadow: 0 18px 44px rgba(11, 63, 176, .12);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    margin: 0;
    font-family: 'Hind Siliguri', 'Noto Sans Bengali', 'SolaimanLipi', Arial, sans-serif;
    color: var(--ink);
    background: var(--bg);
    line-height: 1.75;
    font-size: 16px;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; margin: 0; padding: 0; }
img { max-width: 100%; display: block; }

.text-blue { color: var(--blue); }
.text-red { color: var(--red); }

/* ===== বাটন ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 13px 30px;
    border: 0;
    border-radius: 999px;
    font-family: inherit;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn-blue {
    background: linear-gradient(135deg, var(--blue-dark), var(--blue-light));
    color: #fff;
    box-shadow: 0 10px 24px rgba(11, 94, 215, .35);
}
.btn-red {
    background: linear-gradient(135deg, var(--red-dark), var(--red));
    color: #fff;
    box-shadow: 0 10px 24px rgba(224, 26, 43, .3);
}
.btn-ghost {
    background: #fff;
    color: var(--blue);
    border: 2px solid rgba(11, 94, 215, .25);
}
.btn-sm { padding: 9px 20px; font-size: 15px; }
.btn-block { width: 100%; margin-top: 6px; }

/* ===== সেকশন ১ : হিরো ===== */
.hero {
    position: relative;
    padding: 0 0 90px;
    background:
        radial-gradient(900px 460px at 88% -10%, rgba(224, 26, 43, .10), transparent 62%),
        radial-gradient(880px 520px at 8% 0%, rgba(11, 94, 215, .14), transparent 60%),
        var(--white);
    overflow: hidden;
}

.topbar {
    max-width: 1180px;
    margin: 0 auto;
    padding: 18px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
}
.brand img { height: 62px; width: auto; }

.nav { display: flex; align-items: center; gap: 26px; }
.nav a { font-weight: 600; color: var(--ink); }
.nav a:hover { color: var(--blue); }
.nav a.btn:hover { color: #fff; }

.hero-inner {
    max-width: 1180px;
    margin: 0 auto;
    padding: 40px 24px 0;
    display: grid;
    grid-template-columns: 1.05fr .95fr;
    gap: 56px;
    align-items: center;
}

.badge {
    display: inline-block;
    padding: 7px 18px;
    border-radius: 999px;
    background: rgba(11, 94, 215, .1);
    color: var(--blue-dark);
    font-size: 14px;
    font-weight: 600;
}

.hero h1 {
    margin: 18px 0 14px;
    font-size: clamp(32px, 4.6vw, 52px);
    line-height: 1.35;
    font-weight: 700;
}

.lead { margin: 0 0 28px; font-size: 18px; color: var(--muted); max-width: 560px; }

.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }

.stats {
    display: flex;
    flex-wrap: wrap;
    gap: 38px;
    margin-top: 44px;
    padding-top: 26px;
    border-top: 1px solid var(--line);
}
.stats strong { display: block; font-size: 26px; color: var(--blue); line-height: 1.3; }
.stats span { font-size: 14px; color: var(--muted); }

.hero-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
}
.card {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 24px 22px;
    box-shadow: var(--shadow);
    transition: transform .2s ease, border-color .2s ease;
}
.card:nth-child(even) { transform: translateY(20px); }
.card:hover { transform: translateY(-6px); border-color: rgba(11, 94, 215, .35); }
.card:nth-child(even):hover { transform: translateY(12px); }
.card-icon { font-size: 30px; }
.card h3 { margin: 10px 0 6px; font-size: 19px; }
.card p { margin: 0; font-size: 15px; color: var(--muted); line-height: 1.7; }

/* ===== সেকশন ২ : যোগাযোগ ===== */
.contact {
    background: linear-gradient(160deg, #07327f 0%, var(--blue-dark) 48%, #8f1220 100%);
    color: #fff;
    padding: 80px 0 0;
}
.contact-inner {
    max-width: 1180px;
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: 1fr 1.1fr;
    gap: 56px;
    align-items: start;
}
.contact-info h2 { margin: 0 0 14px; font-size: clamp(28px, 3.4vw, 40px); }
.contact-info > p { margin: 0 0 32px; color: rgba(255, 255, 255, .85); font-size: 17px; max-width: 520px; }

.info-list li {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 14px 0;
    border-bottom: 1px solid rgba(255, 255, 255, .14);
}
.info-list .ic {
    width: 46px;
    height: 46px;
    flex: 0 0 46px;
    display: grid;
    place-items: center;
    border-radius: 14px;
    font-size: 20px;
    background: rgba(255, 255, 255, .14);
}
.info-list strong { display: block; font-size: 14px; color: rgba(255, 255, 255, .7); font-weight: 500; }
.info-list a, .info-list div > span { font-size: 17px; font-weight: 600; color: #fff; }
.info-list a:hover { text-decoration: underline; }

/* ফর্ম */
.form-box {
    background: #fff;
    color: var(--ink);
    border-radius: 22px;
    padding: 32px;
    box-shadow: 0 26px 60px rgba(2, 18, 48, .3);
}
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { margin-bottom: 16px; }
.field label { display: block; margin-bottom: 7px; font-size: 15px; font-weight: 600; }
.field label b { color: var(--red); }

.field input,
.field select,
.field textarea {
    width: 100%;
    padding: 13px 15px;
    border: 1.6px solid var(--line);
    border-radius: 12px;
    font-family: inherit;
    font-size: 16px;
    color: var(--ink);
    background: #fbfcfe;
    transition: border-color .18s ease, box-shadow .18s ease;
}
.field textarea { resize: vertical; min-height: 120px; }
.field input:focus,
.field select:focus,
.field textarea:focus {
    outline: none;
    border-color: var(--blue);
    background: #fff;
    box-shadow: 0 0 0 4px rgba(11, 94, 215, .13);
}

.form-note { margin: 14px 0 0; font-size: 13px; color: var(--muted); text-align: center; }

/* হানিপট — লুকানো */
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

.alert {
    padding: 14px 18px;
    border-radius: 12px;
    margin-bottom: 20px;
    font-size: 15px;
    font-weight: 500;
}
.alert-success { background: #e7f8ef; color: #10663c; border: 1px solid #b6e6cd; }
.alert-error { background: #fdecee; color: var(--red-dark); border: 1px solid #f6c3c9; }

.footer {
    margin-top: 70px;
    padding: 22px 24px;
    text-align: center;
    font-size: 14px;
    color: rgba(255, 255, 255, .75);
    border-top: 1px solid rgba(255, 255, 255, .16);
}
.footer p { margin: 0; }

/* ===== রেসপন্সিভ ===== */
@media (max-width: 940px) {
    .hero-inner, .contact-inner { grid-template-columns: 1fr; gap: 40px; }
    .card:nth-child(even) { transform: none; }
    .card:nth-child(even):hover { transform: translateY(-6px); }
    .lead { max-width: none; }
}

@media (max-width: 560px) {
    .topbar { padding: 14px 18px; }
    .brand img { height: 48px; }
    .nav { gap: 16px; font-size: 15px; }
    .hero { padding-bottom: 60px; }
    .hero-inner { padding-top: 24px; }
    .hero-cards { grid-template-columns: 1fr; }
    .row { grid-template-columns: 1fr; gap: 0; }
    .stats { gap: 24px; }
    .form-box { padding: 22px 18px; }
    .contact { padding-top: 56px; }
}