* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Segoe UI", Arial, sans-serif;
    background: linear-gradient(180deg, #eef3fb 0%, #dbe5f4 100%);
    color: #17314f;
    line-height: 1.55;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: #254d80;
    text-decoration: none;
}

.container {
    width: min(1120px, calc(100% - 40px));
    margin: 0 auto;
}

.narrow {
    width: min(760px, calc(100% - 32px));
}

.site-header {
    background: linear-gradient(90deg, #1d3254 0%, #0f2343 100%);
    border-bottom: 1px solid #2b476e;
}

.header-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 8px 0 6px;
}

.brand {
    display: flex;
    align-items: center;
    color: #ffffff;
    min-width: 0;
    flex: 1 1 auto;
    max-width: 520px;
    height: 118px;
    overflow: hidden;
}

.brand-logo {
    display: block;
    width: auto;
    height: 172px;
    max-width: min(100%, 420px);
    object-fit: contain;
    margin-top: -26px;
    margin-bottom: -28px;
    transform: translateX(-4px);
}

.site-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
}

.site-nav a {
    color: #d7e4f7;
    padding: 8px 14px;
    border-radius: 999px;
    font-weight: 700;
    font-size: 15px;
}

.site-nav a.active,
.site-nav a:hover {
    background: rgba(255, 255, 255, 0.14);
    color: #ffffff;
}

.site-main {
    min-height: calc(100vh - 126px);
}

.hero {
    padding: 28px 0 18px;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 18px;
    align-items: stretch;
}

.eyebrow {
    display: inline-block;
    margin-bottom: 12px;
    padding: 6px 12px;
    border-radius: 999px;
    background: rgba(37, 77, 128, 0.1);
    color: #254d80;
    font-weight: 800;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.hero h1,
.section h1 {
    margin: 0 0 8px;
    font-size: clamp(34px, 4.3vw, 52px);
    line-height: 1.04;
}

.lead {
    margin: 0 0 8px;
    color: #34567e;
    font-size: 18px;
    font-weight: 700;
}

.hero p {
    margin: 0;
    max-width: 620px;
    color: #17314f;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 18px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 180px;
    padding: 12px 18px;
    border-radius: 14px;
    font-weight: 800;
    border: 1px solid transparent;
}

.btn-primary {
    background: linear-gradient(180deg, #355884 0%, #27456d 100%);
    color: #ffffff;
}

.btn-secondary {
    background: #ffffff;
    color: #254d80;
    border-color: #b8c9df;
}

.section {
    padding: 10px 0 22px;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
}

.card {
    background: rgba(255, 255, 255, 0.82);
    border: 1px solid #d6deea;
    border-radius: 18px;
    padding: 20px;
    box-shadow: 0 12px 40px rgba(17, 38, 68, 0.08);
}

.highlight-card {
    background: linear-gradient(180deg, rgba(255,255,255,0.92) 0%, rgba(242,247,255,0.92) 100%);
}

.card h2,
.card h3 {
    margin: 0 0 12px;
}

.feature-list {
    margin: 0;
    padding-left: 18px;
    line-height: 1.58;
}

.feature-list li + li {
    margin-top: 4px;
}

.price-box {
    margin-top: 14px;
    padding: 13px 16px;
    border-radius: 16px;
    background: linear-gradient(135deg, #ffcc64 0%, #ff9d00 100%);
    color: #102744;
    font-size: 21px;
    font-weight: 900;
    text-align: center;
}

.price-box.large {
    font-size: 30px;
}

.muted {
    color: #5a708d;
}

.site-footer {
    background: #102744;
    color: #d8e4f2;
    padding: 18px 0;
}

.footer-row {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    align-items: center;
}

.footer-row p {
    margin: 4px 0 0;
    color: #edf4ff;
}

.footer-logo-wrap {
    height: 96px;
    overflow: hidden;
    display: flex;
    align-items: flex-start;
}

.footer-logo-full {
    display: block;
    width: auto;
    height: 132px;
    max-width: min(100%, 380px);
    object-fit: contain;
    margin-top: -18px;
    margin-bottom: -18px;
    transform: translateX(-6px);
}

.site-footer a {
    color: #f6f9ff;
    font-weight: 700;
}

.payment-layout {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 20px;
    align-items: start;
}

.payment-summary,
.order-card {
    min-height: 100%;
}

.payment-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-top: 20px;
}

.payment-panel {
    background: rgba(255, 255, 255, 0.78);
    border: 1px solid #d6deea;
    border-radius: 18px;
    padding: 18px;
}

.payment-panel h3 {
    margin-top: 0;
}

.payment-qr {
    display: block;
    width: 100%;
    max-width: 280px;
    aspect-ratio: 1 / 1;
    object-fit: contain;
    margin: 0 auto;
    border-radius: 18px;
    background: #ffffff;
    padding: 12px;
    border: 1px solid #d6deea;
}

.payment-qr-placeholder {
    min-height: 260px;
    display: grid;
    place-items: center;
    padding: 18px;
    border: 2px dashed #b8c9df;
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.6);
    color: #4b6484;
    text-align: center;
}

.payment-meta {
    margin: 0;
}

.payment-meta div {
    display: grid;
    grid-template-columns: 110px 1fr;
    gap: 12px;
    padding: 8px 0;
    border-bottom: 1px solid #e3eaf4;
}

.payment-meta div:last-child {
    border-bottom: 0;
}

.payment-meta dt {
    font-weight: 800;
    color: #254d80;
}

.payment-meta dd {
    margin: 0;
    font-weight: 700;
}

.steps-list {
    margin: 0;
    padding-left: 18px;
    line-height: 1.8;
}

.note-box,
.error-box {
    margin-top: 18px;
    padding: 14px 16px;
    border-radius: 16px;
}

.note-box {
    background: rgba(37, 77, 128, 0.08);
    border: 1px solid #c9d8ea;
}

.error-box {
    background: rgba(217, 74, 74, 0.1);
    border: 1px solid rgba(217, 74, 74, 0.2);
    color: #8d1f1f;
}

.error-box p,
.note-box p {
    margin: 6px 0 0;
}

.order-form {
    display: grid;
    gap: 14px;
}

.order-form label {
    display: grid;
    gap: 6px;
    font-weight: 700;
    color: #254d80;
}

.order-form input,
.order-form select {
    width: 100%;
    padding: 12px 14px;
    border-radius: 12px;
    border: 1px solid #bfd0e6;
    background: #ffffff;
    color: #17314f;
    font: inherit;
}

.btn-full {
    width: 100%;
}

.success-pill {
    display: inline-block;
    margin-bottom: 12px;
    padding: 8px 12px;
    border-radius: 999px;
    background: rgba(38, 138, 88, 0.12);
    color: #1c6f47;
    font-weight: 800;
}

.order-meta {
    margin-top: 16px;
}

.tutorial-hero {
    padding-bottom: 8px;
}

.tutorial-hero-grid {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: 18px;
    align-items: stretch;
}

.tutorial-hero-card {
    align-self: stretch;
}

.tutorial-intro {
    margin-bottom: 18px;
}

.tutorial-section-head {
    margin: 24px 0 14px;
}

.tutorial-section-head h2 {
    margin: 0 0 6px;
}

.tutorial-section-head p {
    margin: 0;
    color: #4f6785;
}

.tutorial-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 18px;
}

.tutorial-card {
    padding: 0;
    overflow: hidden;
}

.tutorial-thumb-wrap {
    position: relative;
    background: linear-gradient(180deg, #edf3fc 0%, #dfe8f5 100%);
    padding: 14px;
    border-bottom: 1px solid #d6deea;
}

.tutorial-thumb {
    display: block;
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    border-radius: 14px;
    border: 1px solid #d0dbea;
    background: #ffffff;
}

.tutorial-pages {
    position: absolute;
    right: 26px;
    bottom: 24px;
    padding: 7px 12px;
    border-radius: 999px;
    background: rgba(16, 39, 68, 0.88);
    color: #ffffff;
    font-size: 12px;
    font-weight: 800;
}

.tutorial-card-body {
    padding: 18px 20px 20px;
}

.tutorial-card-body h3 {
    margin: 0 0 10px;
}

.tutorial-card-body p {
    margin: 0 0 16px;
    color: #4d6684;
}

.tutorial-download {
    width: 100%;
    min-width: 0;
}

.btn-disabled {
    opacity: 0.6;
    cursor: default;
    pointer-events: none;
}

.tutorial-thumb-placeholder {
    display: grid;
    place-items: center;
    color: #4e6582;
    font-weight: 800;
    text-align: center;
    padding: 18px;
}

@media (max-width: 900px) {
    .hero-grid,
    .tutorial-hero-grid,
    .card-grid,
    .footer-row,
    .payment-layout,
    .payment-grid {
        grid-template-columns: 1fr;
        display: grid;
    }

    .header-row {
        flex-direction: column;
        align-items: flex-start;
        padding: 10px 0 8px;
    }

    .brand {
        height: 88px;
    }

    .brand-logo {
        height: 126px;
        max-width: min(100%, 320px);
        margin-top: -18px;
        margin-bottom: -20px;
    }

    .footer-logo-wrap {
        height: 76px;
    }

    .footer-logo-full {
        height: 108px;
        margin-top: -14px;
        margin-bottom: -14px;
    }
}