* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: Arial, Helvetica, sans-serif;
    color: #18202b;
    background: #ffffff;
    line-height: 1.6;
}

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

.container {
    width: min(1120px, 92%);
    margin: auto;
}


/* =========================
   HEADER
========================= */

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.96);
    border-bottom: 1px solid #e8ebef;
}

.nav {
    min-height: 74px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 25px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 21px;
    font-weight: 800;
    color: #17202b;
}

.brand>span:last-child>span {
    color: #1b73e8;
}

.brand-mark {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    display: grid;
    place-items: center;
    background: #1b73e8;
    color: white;
    font-weight: 800;
}

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

.nav-links a {
    color: #596474;
    font-size: 14px;
    font-weight: 600;
}

.nav-links a:hover {
    color: #1b73e8;
}

.nav-button {
    padding: 11px 18px;
    border-radius: 9px;
    background: #1b73e8;
    color: white;
    font-size: 14px;
    font-weight: 700;
}


/* =========================
   HERO
========================= */

.hero {
    padding: 90px 0;
    background: linear-gradient(180deg, #f6f9ff 0%, #ffffff 100%);
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 0.9fr;
    align-items: center;
    gap: 70px;
}

.eyebrow {
    display: inline-block;
    margin-bottom: 15px;
    font-size: 12px;
    letter-spacing: 1.5px;
    font-weight: 800;
    color: #1b73e8;
}

.hero h1 {
    max-width: 650px;
    font-size: clamp(42px, 5vw, 64px);
    line-height: 1.08;
    letter-spacing: -2px;
    margin-bottom: 24px;
}

.hero h1 span,
.section-heading h2 span,
.cta h2 span {
    color: #1b73e8;
}

.hero-text {
    max-width: 590px;
    font-size: 18px;
    color: #667180;
    margin-bottom: 32px;
}

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

.primary-button,
.secondary-button {
    display: inline-block;
    padding: 13px 21px;
    border-radius: 9px;
    font-size: 14px;
    font-weight: 700;
}

.primary-button {
    background: #1b73e8;
    color: #fff;
}

.secondary-button {
    border: 1px solid #d9dee5;
    color: #354052;
    background: #fff;
}


/* =========================
   GST PREVIEW
========================= */

.gst-preview {
    background: white;
    border: 1px solid #e3e7ed;
    border-radius: 18px;
    padding: 25px;
    box-shadow: 0 18px 50px rgba(28, 52, 84, 0.10);
}

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 20px;
    border-bottom: 1px solid #edf0f3;
}

.preview-header small {
    display: block;
    color: #7a8593;
    font-size: 10px;
    letter-spacing: 1px;
    font-weight: 700;
}

.preview-header strong {
    display: block;
    margin-top: 4px;
    font-size: 18px;
}

.status {
    padding: 6px 9px;
    border-radius: 6px;
    background: #e9f7ef;
    color: #16834c;
    font-size: 10px;
    font-weight: 800;
}

.preview-row,
.product-row {
    display: grid;
    grid-template-columns: 1.5fr 1fr 0.7fr;
    gap: 12px;
    padding: 14px 0;
}

.preview-row {
    color: #8a94a1;
    font-size: 11px;
    font-weight: 700;
    border-bottom: 1px solid #edf0f3;
}

.product-row {
    font-size: 13px;
    border-bottom: 1px solid #f0f2f5;
}

.product-row strong {
    color: #566171;
}

.product-row b {
    color: #1b73e8;
}

.tax-box {
    margin-top: 20px;
    padding: 17px;
    border-radius: 10px;
    background: #f7f9fc;
}

.tax-box div {
    display: flex;
    justify-content: space-between;
    padding: 5px 0;
    font-size: 13px;
}

.tax-box span {
    color: #707b89;
}

.total {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 20px;
    margin-top: 15px;
    border-top: 1px solid #e4e8ed;
}

.total span {
    color: #596474;
    font-size: 13px;
}

.total strong {
    font-size: 20px;
}


/* =========================
   SECTIONS
========================= */

.section {
    padding: 95px 0;
}

.section-heading {
    max-width: 700px;
    margin-bottom: 50px;
}

.section-heading h2 {
    font-size: clamp(32px, 4vw, 46px);
    line-height: 1.15;
    letter-spacing: -1px;
    margin-bottom: 18px;
}

.section-heading p {
    color: #687383;
    font-size: 16px;
}


/* =========================
   CARDS
========================= */

.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.info-card {
    padding: 28px;
    border: 1px solid #e6e9ed;
    border-radius: 14px;
    background: #fff;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.info-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 15px 35px rgba(30, 50, 75, 0.08);
}

.card-icon {
    width: 44px;
    height: 44px;
    border-radius: 11px;
    display: grid;
    place-items: center;
    background: #edf5ff;
    color: #1b73e8;
    font-size: 21px;
    font-weight: 800;
    margin-bottom: 20px;
}

.info-card h3 {
    font-size: 19px;
    margin-bottom: 10px;
}

.info-card p {
    color: #6b7583;
    font-size: 14px;
}


/* =========================
   WORKFLOW
========================= */

.workflow {
    padding: 95px 0;
    background: #f7f9fc;
}

.steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 22px;
}

.step {
    background: white;
    border: 1px solid #e5e9ee;
    border-radius: 14px;
    padding: 25px;
}

.step-number {
    color: #1b73e8;
    font-weight: 800;
    font-size: 13px;
    margin-bottom: 22px;
}

.step h3 {
    font-size: 17px;
    margin-bottom: 10px;
}

.step p {
    color: #6c7684;
    font-size: 14px;
}


/* =========================
   CTA
========================= */

.cta {
    padding: 85px 0;
}

.cta-box {
    padding: 50px;
    border-radius: 18px;
    background: #f1f6ff;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
}

.cta h2 {
    font-size: clamp(30px, 4vw, 43px);
    line-height: 1.15;
    margin-bottom: 15px;
}

.cta p {
    max-width: 620px;
    color: #687383;
}


/* =========================
   FOOTER
========================= */

.footer {
    background: #101720;
    color: white;
    padding: 65px 0 25px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
}

.footer-brand {
    color: white;
}

.footer p {
    margin-top: 15px;
    max-width: 300px;
    color: #9aa5b3;
    font-size: 14px;
}

.footer h4 {
    margin-bottom: 16px;
    font-size: 14px;
}

.footer a:not(.brand) {
    display: block;
    color: #9aa5b3;
    font-size: 13px;
    margin: 9px 0;
}

.footer a:not(.brand):hover {
    color: white;
}

.copyright {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    border-top: 1px solid #28313b;
    margin-top: 50px;
    padding-top: 22px;
    color: #7f8a97;
    font-size: 12px;
}


/* =========================
   RESPONSIVE
========================= */

@media (max-width: 900px) {

    .nav-links {
        display: none;
    }

    .hero-grid {
        grid-template-columns: 1fr;
        gap: 45px;
    }

    .feature-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .steps {
        grid-template-columns: repeat(2, 1fr);
    }

    .cta-box {
        flex-direction: column;
        align-items: flex-start;
    }

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}


@media (max-width: 600px) {

    .nav-button {
        display: none;
    }

    .hero {
        padding: 65px 0;
    }

    .hero h1 {
        font-size: 42px;
    }

    .hero-text {
        font-size: 16px;
    }

    .section,
    .workflow {
        padding: 70px 0;
    }

    .feature-grid,
    .steps {
        grid-template-columns: 1fr;
    }

    .cta-box {
        padding: 30px;
    }

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

    .copyright {
        flex-direction: column;
    }
}