/* codewithvinay.com — plain CSS, no build step */
:root {
    --ink: #1c2430;
    --muted: #5b6676;
    --line: #dde2e8;
    --bg: #ffffff;
    --soft: #f4f6f9;
    --brand: #1f5fbf;
    --brand-dark: #174a96;
    --warn-bg: #fff4d6;
    --err-bg: #fdecec;
    --err: #a32020;
    --radius: 8px;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
    margin: 0;
    font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans", sans-serif;
    color: var(--ink);
    background: var(--bg);
}
a { color: var(--brand); }
a:hover { color: var(--brand-dark); }
h1, h2, h3 { line-height: 1.25; }
h1 { font-size: clamp(1.9rem, 4.5vw, 2.8rem); margin: .2em 0 .4em; }
h2 { font-size: 1.45rem; margin: 1.8em 0 .6em; }
h3 { font-size: 1.1rem; margin: 0 0 .4em; }
code { font-size: .92em; background: var(--soft); padding: .1em .3em; border-radius: 4px; }

.wrap { max-width: 1040px; margin: 0 auto; padding: 0 20px; }
.narrow > * { max-width: 760px; }
.narrow > .table-wrap, .narrow > table { max-width: 900px; }
.section { padding: 28px 20px 12px; }
.muted { color: var(--muted); }
.small { font-size: .9rem; }
.lead { font-size: 1.15rem; color: #334052; }
.eyebrow { text-transform: uppercase; letter-spacing: .06em; font-size: .8rem; font-weight: 600; color: var(--brand); margin: 0; }

/* header */
.top { border-bottom: 1px solid var(--line); background: #fff; position: sticky; top: 0; z-index: 10; }
.top-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 60px; flex-wrap: wrap; }
.brand { white-space: nowrap; font-weight: 700; font-size: 1.15rem; color: var(--ink); text-decoration: none; }
.brand span { color: var(--brand); }
.nav { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }
.nav a { white-space: nowrap; text-decoration: none; color: var(--ink); font-size: .95rem; }
.nav a.btn { color: #fff; }

/* buttons */
.btn {
    display: inline-block; background: var(--brand); color: #fff; text-decoration: none;
    padding: .7em 1.3em; border-radius: var(--radius); font-weight: 600; border: 2px solid var(--brand);
    cursor: pointer; font-size: 1rem;
}
.btn:hover { background: var(--brand-dark); border-color: var(--brand-dark); color: #fff; }
.btn-ghost { background: transparent; color: var(--brand); }
.btn-ghost:hover { background: var(--soft); color: var(--brand-dark); }
.btn-sm { padding: .4em .9em; font-size: .9rem; }
.cta { display: flex; gap: 12px; flex-wrap: wrap; margin: 1.2em 0 .6em; }

/* buttons: icons and price tags */
.btn i { margin-right: .35em; }
.btn .tag {
    display: inline-block; margin-left: .45em; padding: .05em .5em; border-radius: 999px; font-size: .85em;
    background: rgba(255, 255, 255, .22); font-weight: 700;
}
.btn-ghost .tag { background: #e6eefb; color: var(--brand-dark); }
.btn-buy { background: #1b7a43; border-color: #1b7a43; }
.btn-buy:hover { background: #14603a; border-color: #14603a; }
.btn-off { opacity: .55; cursor: default; }
.btn-off:hover { background: inherit; }
span.btn-off:not(.btn-ghost) { background: #6b7685; border-color: #6b7685; }
span.btn-ghost.btn-off:hover { background: transparent; color: var(--brand); }
button.btn .tag { background: rgba(255, 255, 255, .22); }

/* books */
.books { display: grid; gap: 22px; }
.book { display: grid; grid-template-columns: 180px 1fr; gap: 22px; border: 1px solid var(--line); border-radius: var(--radius);
        padding: 18px; background: #fff; }
.book-cover img { width: 180px; height: auto; display: block; border-radius: 4px; box-shadow: 0 2px 10px rgba(20, 40, 80, .18); }
.book h3 { font-size: 1.3rem; margin: .25em 0 .4em; }
.book h3 a { color: var(--ink); text-decoration: none; }
.book h3 a:hover { color: var(--brand); }
.book-body p { margin: 0 0 .4em; color: #364152; }
.book-body .cta { margin-top: .9em; }
.book-hero { display: grid; grid-template-columns: 220px 1fr; gap: 32px; align-items: start; }
.book-hero-cover { width: 220px; height: auto; border-radius: 4px; box-shadow: 0 3px 14px rgba(20, 40, 80, .2); }
.card h3 i { color: var(--brand); margin-right: .3em; }

/* hero */
.hero { background: linear-gradient(180deg, var(--soft), #fff); padding: 48px 0 28px; border-bottom: 1px solid var(--line); }
.hero .lead { max-width: 680px; }

/* cards */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(270px, 1fr)); gap: 16px; }
.card { border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 20px; background: #fff; }
.card p { margin: 0; color: #364152; }

/* tables */
.table-wrap { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; }
.compare th, .compare td, .plain th, .plain td { border-bottom: 1px solid var(--line); padding: 10px 12px; text-align: left; vertical-align: top; }
.compare thead th { background: var(--soft); }
.compare tbody th { font-weight: 600; width: 40%; }
.plain { font-size: .95rem; margin: .6em 0 1em; }
.plain thead th { background: var(--soft); }

/* notices */
.notice { background: var(--warn-bg); border-radius: var(--radius); padding: 14px 18px; margin: 1em 0; }
.error-box { background: var(--err-bg); color: var(--err); border-radius: var(--radius); padding: 10px 18px; margin: 1em 0; }
.error-box ul { margin: .3em 0 .5em; padding-left: 1.2em; }
.todo { background: var(--warn-bg); padding: 0 .3em; border-radius: 4px; color: #7a5a00; }
.price { font-size: 1.8rem; font-weight: 700; margin: .4em 0; }

/* forms */
.form { display: grid; gap: 6px; margin-top: 1em; max-width: 520px; }
.form label { font-weight: 600; margin-top: 10px; }
.form input[type=text], .form input[type=email], .form select {
    font: inherit; padding: .6em .7em; border: 1px solid #b9c2ce; border-radius: 6px; width: 100%; background: #fff;
}
.form input:focus, .form select:focus { outline: 3px solid #c9dafb; border-color: var(--brand); }
.form .check { font-weight: 400; display: flex; gap: 10px; align-items: flex-start; margin-top: 12px; }
.form .check input { margin-top: .35em; width: 18px; height: 18px; flex: none; }
.form button { margin-top: 18px; justify-self: start; }
.hp { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }

/* policy pages */
.prose ul { padding-left: 1.2em; }
.prose li { margin: .3em 0; }
.facts { display: grid; grid-template-columns: max-content 1fr; gap: 6px 18px; }
.facts dt { font-weight: 600; }
.facts dd { margin: 0; }

/* footer */
.foot { border-top: 1px solid var(--line); margin-top: 48px; padding: 22px 0 30px; background: var(--soft); font-size: .9rem; }
.foot-links { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 8px; }
.foot p { margin: .3em 0; }

@media (max-width: 560px) {
    body { font-size: 16px; }
    .nav { gap: 10px; }
    .nav a { font-size: .85rem; }
    .brand { font-size: 1.05rem; }
    .nav .nav-extra { display: none; }
    .top-row { flex-wrap: nowrap; }
    .hero { padding-top: 32px; }
    .book, .book-hero { grid-template-columns: 1fr; }
    .book-cover img, .book-hero-cover { width: 140px; }
    .cta .btn { width: 100%; text-align: center; }
}