:root {
    --ink: #0f172a;
    --ink-soft: #475569;
    --paper: #e8edf2;
    --surface: #ffffff;
    --brand: #0f172a;
    --accent: #ea580c;
    --accent-deep: #c2410c;
    --line: rgba(15, 23, 42, 0.12);
    --radius: 12px;
    --font-display: "Archivo", system-ui, sans-serif;
    --font-body: "Source Sans 3", system-ui, sans-serif;
    --max: 1100px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: var(--font-body);
    color: var(--ink);
    background: var(--paper);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.page-bg {
    position: fixed;
    inset: 0;
    z-index: -1;
    background:
        linear-gradient(180deg, rgba(15, 23, 42, 0.03) 0%, transparent 28%),
        repeating-linear-gradient(
            90deg,
            transparent,
            transparent 47px,
            rgba(15, 23, 42, 0.03) 47px,
            rgba(15, 23, 42, 0.03) 48px
        ),
        linear-gradient(160deg, #eef2f6 0%, #e4e9ef 55%, #dde5ea 100%);
}

.page-bg::after {
    content: "";
    position: absolute;
    width: min(50vw, 480px);
    height: min(50vw, 480px);
    top: -8%;
    right: -8%;
    border-radius: 40% 60% 50% 50%;
    background: radial-gradient(circle, rgba(234, 88, 12, 0.16), transparent 68%);
    filter: blur(28px);
    pointer-events: none;
}

a {
    color: var(--accent-deep);
    text-decoration-thickness: 1px;
    text-underline-offset: 3px;
}

a:hover {
    color: var(--accent);
}

.site-header {
    max-width: var(--max);
    margin: 0 auto;
    padding: 1.1rem 1.25rem;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.brand {
    font-family: var(--font-display);
    font-size: clamp(1.45rem, 3vw, 1.85rem);
    font-weight: 800;
    color: var(--brand);
    text-decoration: none;
    letter-spacing: -0.03em;
}

.brand:hover {
    color: var(--accent);
}

.nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.65rem 1.1rem;
    align-items: center;
    font-size: 0.95rem;
    font-weight: 600;
}

.nav a {
    color: var(--ink-soft);
    text-decoration: none;
}

.nav a:hover {
    color: var(--ink);
}

.nav-cta {
    color: #fff !important;
    background: var(--accent);
    padding: 0.45rem 0.9rem;
    border-radius: 999px;
}

.nav-cta:hover {
    background: var(--accent-deep);
    color: #fff !important;
}

main {
    max-width: var(--max);
    margin: 0 auto;
    padding: 0.75rem 1.25rem 4.5rem;
}

.hero {
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(260px, 0.85fr);
    gap: clamp(1.25rem, 3vw, 2.5rem);
    align-items: center;
    padding: clamp(1.75rem, 4vw, 3rem) clamp(1.2rem, 3vw, 2.25rem);
    margin: 0.35rem 0 0.75rem;
    border-radius: calc(var(--radius) + 6px);
    background:
        linear-gradient(135deg, #ffffff 0%, #f7f8fa 55%, #fff4ec 100%);
    border: 1px solid rgba(255, 255, 255, 0.9);
    box-shadow: 0 18px 48px rgba(15, 23, 42, 0.07);
}

.eyebrow {
    margin: 0 0 0.65rem;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--accent-deep);
}

.hero h1 {
    font-family: var(--font-display);
    font-size: clamp(2.1rem, 5vw, 3.2rem);
    font-weight: 800;
    line-height: 1.05;
    letter-spacing: -0.03em;
    margin: 0 0 1rem;
    color: var(--brand);
    max-width: 16ch;
}

.hero-copy > p:not(.eyebrow) {
    margin: 0 0 1.5rem;
    font-size: clamp(1.02rem, 2vw, 1.12rem);
    color: var(--ink-soft);
    max-width: 34rem;
}

.cta-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem 1rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.78rem 1.25rem;
    font-family: var(--font-body);
    font-weight: 700;
    font-size: 0.95rem;
    border-radius: 999px;
    text-decoration: none;
    border: 1.5px solid transparent;
    cursor: pointer;
    transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}

.btn:hover {
    transform: translateY(-1px);
}

.btn-primary {
    background: var(--brand);
    color: #f8fafc;
}

.btn-primary:hover {
    background: #1e293b;
    color: #fff;
}

.btn-ghost {
    background: #fff;
    border-color: var(--line);
    color: var(--ink);
}

.btn-ghost:hover {
    border-color: rgba(15, 23, 42, 0.28);
    color: var(--ink);
}

.hero-panel {
    padding: 1.1rem 1.15rem 1.2rem;
    border-radius: var(--radius);
    background: var(--brand);
    color: #e2e8f0;
    box-shadow: 0 18px 40px rgba(15, 23, 42, 0.22);
}

.hero-panel-label {
    margin: 0 0 0.75rem;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: rgba(226, 232, 240, 0.55);
}

.hero-stack {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.hero-stack a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 0.68rem 0.78rem;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.08);
    text-decoration: none;
    color: inherit;
    transition: background 0.15s ease, transform 0.15s ease;
}

.hero-stack a:hover {
    background: rgba(234, 88, 12, 0.22);
    transform: translateX(2px);
    color: #fff;
}

.hero-stack-name {
    font-family: var(--font-display);
    font-weight: 700;
    letter-spacing: -0.02em;
}

.hero-stack-tag {
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: #fdba74;
}

.section {
    margin-top: 2.6rem;
}

.section h2,
.affiliate-block h2 {
    font-family: var(--font-display);
    font-size: clamp(1.4rem, 3vw, 1.75rem);
    font-weight: 700;
    letter-spacing: -0.025em;
    margin: 0 0 0.35rem;
}

.section-lead {
    margin: 0 0 1.2rem;
    color: var(--ink-soft);
    max-width: 38rem;
}

.section-more {
    margin-top: 1.15rem;
}

.product-list {
    display: flex;
    flex-direction: column;
    gap: 0.7rem;
}

.product-row {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 1rem;
    align-items: center;
    padding: 1.15rem 1.2rem;
    border-radius: var(--radius);
    background: var(--surface);
    border: 1px solid rgba(255, 255, 255, 0.85);
    box-shadow: 0 8px 24px rgba(15, 23, 42, 0.04);
    text-decoration: none;
    color: inherit;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.product-row-article {
    grid-template-columns: auto 1fr auto;
}

.article-thumb {
    width: 120px;
    height: 80px;
    object-fit: cover;
    border-radius: 8px;
    background: rgba(15, 23, 42, 0.06);
}

.article-cover {
    margin: 0 0 1.5rem;
    border-radius: var(--radius);
    overflow: hidden;
    background: rgba(15, 23, 42, 0.06);
}

.article-cover img {
    display: block;
    width: 100%;
    max-height: 420px;
    height: auto;
}

.article-cover figcaption {
    margin: 0.45rem 0 0;
    font-size: 0.85rem;
    color: var(--ink-soft);
}

.article-date {
    margin: -1rem 0 1.25rem;
    font-size: 0.9rem;
    color: var(--ink-soft);
}

.product-row:hover {
    transform: translateY(-2px);
    box-shadow: 0 14px 32px rgba(15, 23, 42, 0.08);
}

.product-row h3 {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 700;
    margin: 0 0 0.25rem;
    letter-spacing: -0.02em;
    color: var(--brand);
}

.product-row p {
    margin: 0;
    color: var(--ink-soft);
    font-size: 0.96rem;
}

.badge {
    display: inline-block;
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--accent-deep);
    background: rgba(234, 88, 12, 0.1);
    padding: 0.2rem 0.5rem;
    border-radius: 999px;
    margin-bottom: 0.4rem;
}

.meta-col {
    font-size: 0.88rem;
    font-weight: 700;
    color: var(--accent);
    white-space: nowrap;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.85rem;
}

.info-card {
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
    padding: 1.2rem 1.2rem 1.15rem;
    border-radius: var(--radius);
    background: var(--surface);
    border: 1px solid rgba(15, 23, 42, 0.06);
    text-decoration: none;
    color: inherit;
    box-shadow: 0 8px 22px rgba(15, 23, 42, 0.04);
    transition: transform 0.15s ease, border-color 0.15s ease;
}

.info-card:hover {
    transform: translateY(-2px);
    border-color: rgba(234, 88, 12, 0.35);
    color: inherit;
}

.info-card h3 {
    font-family: var(--font-display);
    font-size: 1.15rem;
    margin: 0;
    letter-spacing: -0.02em;
}

.info-card p {
    margin: 0;
    color: var(--ink-soft);
    font-size: 0.95rem;
    flex: 1;
}

.card-link {
    font-weight: 700;
    color: var(--accent);
    font-size: 0.9rem;
}

.page-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4.5vw, 2.75rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    margin: 0.85rem 0 0.75rem;
}

.lede {
    color: var(--ink-soft);
    font-size: 1.08rem;
    max-width: 40rem;
    margin: 0 0 1.75rem;
}

.prose {
    max-width: 42rem;
}

.prose p,
.prose li {
    color: var(--ink-soft);
    font-size: 1.05rem;
}

.prose h2 {
    font-family: var(--font-display);
    font-size: 1.35rem;
    margin: 1.75rem 0 0.65rem;
    letter-spacing: -0.02em;
    color: var(--brand);
}

.prose ul {
    padding-left: 1.2rem;
}

.calc-form {
    background: var(--surface);
    border-radius: var(--radius);
    padding: 1.35rem 1.35rem 1.4rem;
    border: 1px solid rgba(15, 23, 42, 0.06);
    box-shadow: 0 10px 28px rgba(15, 23, 42, 0.05);
    margin-bottom: 1.25rem;
}

.calc-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-bottom: 1.15rem;
}

.calc-form label {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    font-weight: 600;
    font-size: 0.92rem;
}

.calc-form input,
.calc-form select {
    font: inherit;
    padding: 0.7rem 0.8rem;
    border-radius: 10px;
    border: 1px solid var(--line);
    background: #f8fafc;
    color: var(--ink);
}

.calc-form input:focus,
.calc-form select:focus {
    outline: 2px solid rgba(234, 88, 12, 0.35);
    border-color: var(--accent);
}

.calc-result {
    background: #0f172a;
    color: #e2e8f0;
    border-radius: var(--radius);
    padding: 1.35rem 1.4rem;
    margin-bottom: 1.75rem;
}

.calc-result h2 {
    font-family: var(--font-display);
    margin: 0 0 0.55rem;
    font-size: 1.25rem;
}

.calc-result-main {
    margin: 0 0 0.85rem;
    color: #fdba74;
    font-weight: 600;
}

.calc-result-list {
    margin: 0;
    padding-left: 1.1rem;
    color: rgba(226, 232, 240, 0.88);
}

.calc-result-list li {
    margin-bottom: 0.35rem;
}

.affiliate-block {
    margin-top: 2.25rem;
}

.about-panel {
    max-width: 42rem;
    padding: 1.5rem 1.6rem;
    border-radius: calc(var(--radius) + 4px);
    background: var(--surface);
    border: 1px solid rgba(15, 23, 42, 0.06);
    box-shadow: 0 12px 32px rgba(15, 23, 42, 0.05);
}

.site-footer {
    max-width: var(--max);
    margin: 0 auto;
    padding: 1.75rem 1.25rem 3rem;
    border-top: 1px solid var(--line);
    font-size: 0.86rem;
    color: var(--ink-soft);
}

.disclosure {
    margin: 0 0 1rem;
    max-width: 46rem;
}

.footer-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem 1.5rem;
    justify-content: space-between;
}

.footer-row a {
    color: var(--ink-soft);
}

.empty-note {
    color: var(--ink-soft);
}

@media (max-width: 860px) {
    .hero {
        grid-template-columns: 1fr;
    }

    .card-grid {
        grid-template-columns: 1fr;
    }

    .calc-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .product-row,
    .product-row-article {
        grid-template-columns: 1fr;
    }

    .article-thumb {
        width: 100%;
        height: 160px;
    }

    .hero h1 {
        max-width: none;
    }
}