:root {
    --ink: #15345b;
    --ink-soft: #426582;
    --blue: #0c62b7;
    --blue-deep: #064a94;
    --sky: #dff5ff;
    --sun: #f5b22d;
    --paper: #ffffff;
    --line: rgba(21, 52, 91, 0.14);
    --shadow: 0 18px 50px rgba(12, 98, 183, 0.16);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    color: var(--ink);
    background: #f7fcff;
    font-family: Arial, Helvetica, sans-serif;
    line-height: 1.55;
}

a {
    color: inherit;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    padding: 14px clamp(18px, 4vw, 56px);
    background: rgba(255, 255, 255, 0.9);
    border-bottom: 1px solid var(--line);
    backdrop-filter: blur(14px);
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    color: var(--blue-deep);
    font-weight: 800;
    text-decoration: none;
}

.brand img {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 2px solid var(--blue);
    object-fit: cover;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: clamp(12px, 2vw, 26px);
    color: var(--ink-soft);
    font-size: 0.95rem;
    font-weight: 700;
}

.main-nav a {
    text-decoration: none;
}

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

.hero {
    position: relative;
    min-height: calc(100vh - 73px);
    display: grid;
    align-items: end;
    overflow: hidden;
    background: var(--sky);
}

.hero-media {
    position: absolute;
    inset: 0;
    background-image: linear-gradient(90deg, rgba(6, 74, 148, 0.38), rgba(255, 255, 255, 0.08) 42%, rgba(255, 255, 255, 0.4)), url("banner.png");
    background-size: cover;
    background-position: center;
}

.hero-content {
    position: relative;
    width: min(720px, calc(100% - 36px));
    margin: 0 0 clamp(34px, 8vh, 90px) clamp(18px, 7vw, 86px);
    color: #ffffff;
    text-shadow: 0 2px 18px rgba(5, 35, 78, 0.28);
}

.eyebrow {
    margin: 0 0 10px;
    color: var(--sun);
    font-size: 0.82rem;
    font-weight: 800;
    letter-spacing: 0;
    text-transform: uppercase;
}

.hero h1,
.content-page h1 {
    margin: 0;
    font-size: clamp(3rem, 8vw, 6.6rem);
    line-height: 0.95;
}

.hero-copy {
    width: min(620px, 100%);
    margin: 20px 0 0;
    font-size: clamp(1.08rem, 2vw, 1.35rem);
    font-weight: 700;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 28px;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 12px 18px;
    border-radius: 8px;
    border: 2px solid transparent;
    font-weight: 800;
    text-decoration: none;
    text-shadow: none;
}

.button.primary {
    color: #ffffff;
    background: var(--blue);
    box-shadow: 0 12px 28px rgba(6, 74, 148, 0.28);
}

.button.secondary {
    color: var(--blue-deep);
    background: #ffffff;
    border-color: rgba(255, 255, 255, 0.8);
}

.band {
    padding: clamp(56px, 8vw, 96px) clamp(18px, 5vw, 72px);
}

.intro,
.pathway {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.9fr);
    gap: clamp(24px, 6vw, 76px);
    align-items: center;
    background: #ffffff;
}

.section-copy,
.section-heading {
    max-width: 760px;
}

.section-copy h2,
.section-heading h2 {
    margin: 0;
    color: var(--ink);
    font-size: clamp(2rem, 4vw, 3.3rem);
    line-height: 1.05;
}

.section-copy p:not(.eyebrow) {
    margin: 18px 0 0;
    color: var(--ink-soft);
    font-size: 1.08rem;
}

.youtube-pointer {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    max-width: 100%;
    margin-top: 24px;
    padding: 12px 16px;
    border: 1px solid rgba(12, 98, 183, 0.2);
    border-radius: 8px;
    color: var(--blue-deep);
    background: #f7fcff;
    font-weight: 800;
    text-decoration: none;
    box-shadow: 0 10px 24px rgba(12, 98, 183, 0.1);
}

.youtube-pointer:hover {
    color: #ffffff;
    background: var(--blue);
}

.youtube-icon {
    display: inline-grid;
    place-items: center;
    width: 34px;
    height: 34px;
    flex: 0 0 34px;
    border-radius: 50%;
    color: #ffffff;
    background: #e62117;
    font-size: 0.9rem;
    line-height: 1;
}

.feature-panel {
    display: grid;
    grid-template-columns: 110px minmax(0, 1fr);
    gap: 18px;
    align-items: center;
    padding: 22px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #f7fcff;
    box-shadow: var(--shadow);
}

.feature-panel img {
    width: 110px;
    height: 110px;
    border-radius: 50%;
    object-fit: cover;
}

.feature-panel h3,
.book-card h3 {
    margin: 0;
    font-size: 1.25rem;
}

.feature-panel p,
.book-card p {
    margin: 8px 0 0;
    color: var(--ink-soft);
}

.books {
    background: linear-gradient(180deg, #edf9ff 0%, #ffffff 100%);
}

.book-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
    margin-top: 28px;
}

.book-card {
    min-height: 230px;
    padding: 24px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--paper);
}

.book-mark {
    display: inline-grid;
    place-items: center;
    width: 42px;
    height: 42px;
    margin-bottom: 24px;
    border-radius: 50%;
    color: #ffffff;
    background: var(--blue);
    font-weight: 800;
}

.pathway {
    border-top: 1px solid var(--line);
}

.page-main {
    min-height: calc(100vh - 180px);
    padding: clamp(48px, 8vw, 100px) clamp(18px, 5vw, 72px);
}

.content-page {
    max-width: 860px;
}

.content-page p:not(.eyebrow) {
    color: var(--ink-soft);
    font-size: 1.08rem;
}

.site-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 22px clamp(18px, 5vw, 72px);
    color: var(--ink-soft);
    background: #eaf8ff;
    border-top: 1px solid var(--line);
}

.site-footer p {
    margin: 0;
}

.visit-counter strong {
    color: var(--blue-deep);
}

@media (max-width: 820px) {
    .site-header,
    .site-footer {
        align-items: flex-start;
        flex-direction: column;
    }

    .main-nav {
        flex-wrap: wrap;
    }

    .hero {
        min-height: 720px;
    }

    .hero-media {
        background-position: 58% center;
    }

    .hero-content {
        margin: 0 18px 42px;
    }

    .intro,
    .pathway,
    .book-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 520px) {
    .brand span {
        font-size: 0.95rem;
    }

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

    .feature-panel img {
        width: 88px;
        height: 88px;
    }

    .button {
        width: 100%;
    }
}