:root {
    --bg: #eef3fb;
    --surface: rgba(255, 255, 255, 0.84);
    --surface-strong: #ffffff;
    --surface-dark: #1a2758;
    --surface-dark-2: #24357a;
    --text: #15203b;
    --muted: #5c6883;
    --line: rgba(54, 75, 157, 0.13);
    --line-strong: rgba(54, 75, 157, 0.24);
    --brand: #3247a5;
    --brand-2: #5f77ea;
    --brand-soft: rgba(95, 119, 234, 0.14);
    --success-soft: rgba(68, 121, 86, 0.1);
    --shadow: 0 22px 60px rgba(18, 30, 76, 0.12);
    --shadow-soft: 0 12px 30px rgba(18, 30, 76, 0.08);
    --radius-xl: 30px;
    --radius-lg: 22px;
    --radius-md: 16px;
    --max: 1240px;
    --header-h: 84px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-width: 320px;
    font-family: 'Inter', sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at top left, rgba(95, 119, 234, 0.15), transparent 24%),
        radial-gradient(circle at top right, rgba(50, 71, 165, 0.1), transparent 28%),
        linear-gradient(180deg, #f8fbff 0%, #f2f6fd 52%, #eaf0fb 100%);
    line-height: 1.65;
}

img {
    display: block;
    width: 100%;
    height: auto;
}

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

button,
a {
    -webkit-tap-highlight-color: transparent;
}

button {
    font: inherit;
}

.shell {
    width: min(var(--max), calc(100% - 40px));
    margin: 0 auto;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(18px);
    background: rgba(50, 71, 165, 0.92);
    border-bottom: 1px solid rgba(255, 255, 255, 0.5);
    transition: transform 0.28s ease, box-shadow 0.28s ease;
}

.site-header.is-scrolled {
    box-shadow: 0 10px 32px rgba(18, 30, 76, 0.08);
}

.site-header__inner {
    min-height: var(--header-h);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.brand,
.footer-brand {
    font-weight: 800;
    letter-spacing: 0.22em;
    text-transform: uppercase;
}

.brand {
    font-size: 0.95rem;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
}

.brand__logo {
    width: 22px;
    height: 30px;
    object-fit: contain;
    flex: 0 0 auto;
}

.brand span {
    color: #fff;
}

.header-nav {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.header-nav a,
.mobile-menu a,
.section-nav__link,
.mobile-section-nav a {
    border-radius: 999px;
    transition: background-color 0.25s ease, color 0.25s ease, border-color 0.25s ease, transform 0.25s ease;
}

.header-nav a {
    padding: 10px 14px;
    font-size: 0.95rem;
    color: var(--muted);
}

.header-nav a:hover,
.header-nav a.is-active {
    background: var(--brand-soft);
    color: var(--brand);
}

.menu-toggle {
    display: none;
    width: 48px;
    height: 48px;
    border: 1px solid var(--line-strong);
    border-radius: 14px;
    background: var(--surface-strong);
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    box-shadow: var(--shadow-soft);
}

.menu-toggle span:not(.sr-only) {
    display: block;
    width: 18px;
    height: 2px;
    border-radius: 999px;
    background: var(--brand);
    transition: transform 0.22s ease, opacity 0.22s ease;
}

.menu-toggle.is-open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.menu-toggle.is-open span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.is-open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

.mobile-menu {
    display: none;
    border-top: 1px solid rgba(50, 71, 165, 0.08);
    background: rgba(248, 251, 255, 0.97);
}

.mobile-menu__inner {
    display: grid;
    gap: 10px;
    padding: 0 0 20px;
}

.mobile-menu a {
    padding: 12px 14px;
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.9);
    color: var(--text);
}

.mobile-menu a:hover,
.mobile-menu a.is-active {
    background: var(--brand-soft);
    color: var(--brand);
    border-color: rgba(50, 71, 165, 0.22);
}

.section {
    padding: 34px 0;
}

.hero {
    padding-top: 34px;
}

.hero__grid {
    display: grid;
    grid-template-columns: 268px minmax(0, 1fr);
    gap: 28px;
    align-items: start;
}

.section-nav {
    position: static;
    top: auto;
    display: grid;
    gap: 14px;
}

.back-link,
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    border-radius: 999px;
    font-weight: 700;
    border: none;
    cursor: pointer;
}

.back-link {
    padding: 14px 18px;
    background: var(--brand);
    color: #fff;
    box-shadow: var(--shadow-soft);
}

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

.back-link__icon {
    font-size: 1.05rem;
}

.section-nav__panel,
.glass-card {
    background: var(--surface);
    border: 1px solid rgba(255, 255, 255, 0.62);
    backdrop-filter: blur(16px);
    box-shadow: var(--shadow);
}

.section-nav__panel {
    border-radius: var(--radius-xl);
    padding: 22px;
    display: grid;
    gap: 10px;
}

.section-nav__eyebrow,
.eyebrow {
    margin: 0;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    font-size: 0.76rem;
    font-weight: 700;
    color: var(--brand);
}

.section-nav__link {
    padding: 11px 14px;
    color: var(--muted);
    border: 1px solid transparent;
    font-weight: 600;
}

.section-nav__link:hover,
.section-nav__link.is-active,
.mobile-section-nav a:hover,
.mobile-section-nav a.is-active {
    background: var(--brand-soft);
    border-color: rgba(50, 71, 165, 0.16);
    color: var(--brand);
}

.mobile-section-nav {
    display: none;
    gap: 10px;
    overflow-x: auto;
    padding-bottom: 6px;
    margin-bottom: 16px;
    scrollbar-width: none;
}

.mobile-section-nav::-webkit-scrollbar {
    display: none;
}

.mobile-section-nav a {
    flex: 0 0 auto;
    padding: 10px 14px;
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.88);
    color: var(--muted);
    font-size: 0.92rem;
    font-weight: 600;
}

.hero__content {
    display: grid;
    gap: 18px;
}

.hero-card {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.9fr);
    gap: 28px;
    padding: 28px;
    border-radius: var(--radius-xl);
    align-items: stretch;
}

.hero-copy,
.content-panel,
.content-card,
.insight-card,
.proof-card,
.dark-panel__copy {
    display: grid;
    gap: 16px;
    align-content: start;
}

.hero-copy h1,
.section-heading h2,
.two-column-card h2,
.content-panel h2,
.content-card h2,
.dark-panel h2,
.proof-card h2,
.cta-band h2 {
    margin: 0;
    line-height: 1.08;
    letter-spacing: -0.03em;
}

.hero-copy h1 {
    font-size: clamp(2.3rem, 4vw, 4.25rem);
    max-width: 12ch;
}

.hero-subtitle {
    margin: 0;
    font-size: 1.16rem;
    line-height: 1.55;
    color: #263557;
    font-weight: 600;
}

.hero-text,
.section-heading p,
.two-column-card p,
.content-panel p,
.content-card p,
.insight-card p,
.result-card p,
.principle-card p,
.proof-card p,
.footer-copy,
.footer-meta,
.dark-panel__copy p {
    margin: 0;
    color: var(--muted);
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    padding-top: 6px;
}

.btn {
    padding: 14px 22px;
    box-shadow: var(--shadow-soft);
}

.btn--primary {
    background: linear-gradient(135deg, var(--brand) 0%, var(--brand-2) 100%);
    color: #fff;
}

.btn--secondary {
    background: rgba(255, 255, 255, 0.82);
    color: var(--text);
    border: 1px solid var(--line);
}

.pull-quote {
    margin: 10px 0 0;
    display: grid;
    grid-template-columns: 4px minmax(0, 1fr);
    gap: 14px;
    align-items: start;
    color: #35415b;
}

.pull-quote p {
    margin: 0;
    font-size: 1.05rem;
    font-weight: 700;
    line-height: 1.5;
}

.pull-quote__line {
    width: 4px;
    min-height: 100%;
    border-radius: 999px;
    background: linear-gradient(180deg, var(--brand) 0%, rgba(95, 119, 234, 0.25) 100%);
}

.pull-quote--soft {
    padding: 18px;
    border-radius: var(--radius-md);
    background: rgba(95, 119, 234, 0.08);
}

.card-media {
    overflow: hidden;
    border-radius: 24px;
    min-height: 100%;
    background: rgba(18, 30, 76, 0.08);
}

.card-media img,
.mosaic-main img,
.mosaic-side img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.stats-grid,
.feature-grid,
.results-grid,
.principles-grid {
    display: grid;
    gap: 16px;
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.stat-card,
.feature-card,
.result-card,
.principle-card {
    border-radius: var(--radius-lg);
    padding: 22px;
}

.stat-card {
    display: grid;
    gap: 6px;
}

.stat-value {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--brand);
}

.stat-label {
    color: var(--muted);
    font-size: 0.95rem;
}

.story-stack {
    display: grid;
    gap: 20px;
}

.section-heading {
    display: grid;
    gap: 12px;
    max-width: 820px;
}

.section-heading--compact {
    max-width: 900px;
}

.section-heading h2,
.two-column-card h2,
.content-panel h2,
.content-card h2,
.dark-panel h2,
.proof-card h2,
.cta-band h2 {
    font-size: clamp(1.8rem, 3vw, 2.9rem);
}

.feature-card {
    display: grid;
    gap: 12px;
}

.feature-number {
    display: inline-flex;
    width: 42px;
    height: 42px;
    align-items: center;
    justify-content: center;
    border-radius: 14px;
    background: var(--brand-soft);
    color: var(--brand);
    font-weight: 800;
}

.feature-card h3,
.checklist-card h3,
.insight-card h3,
.dark-grid h3,
.result-card h3,
.principle-card h3,
.mini-grid h3 {
    margin: 0;
    font-size: 1.02rem;
}

.feature-card p,
.checklist-card p,
.checklist li,
.insight-card li,
.dark-grid p,
.result-card p,
.principle-card p,
.mini-grid p {
    margin: 0;
    color: var(--muted);
}

.two-column-card,
.split-showcase,
.two-panel-grid,
.proof-card,
.cta-band__inner {
    display: grid;
    gap: 22px;
}

.two-column-card {
    grid-template-columns: minmax(0, 1.15fr) minmax(290px, 0.85fr);
    padding: 28px;
    border-radius: var(--radius-xl);
    align-items: start;
}

.checklist-card,
.insight-card {
    padding: 24px;
    border-radius: var(--radius-lg);
    background: rgba(255, 255, 255, 0.72);
    border: 1px solid var(--line);
}

.checklist,
.dark-grid,
.mini-grid {
    display: grid;
    gap: 12px;
}

.checklist {
    padding-left: 18px;
}

.supporting-note {
    padding-top: 4px;
    font-weight: 600;
    color: var(--text);
}

.split-showcase {
    grid-template-columns: minmax(0, 1fr) minmax(350px, 0.82fr);
    align-items: stretch;
}

.content-panel {
    padding: 30px;
    border-radius: var(--radius-xl);
}

.mini-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}

.mini-grid article {
    padding: 18px;
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.62);
    border: 1px solid var(--line);
}

.media-tall {
    min-height: 100%;
    border-radius: var(--radius-xl);
}

.two-panel-grid {
    grid-template-columns: minmax(0, 1fr) minmax(280px, 0.82fr);
}

.content-card,
.insight-card {
    padding: 28px;
    border-radius: var(--radius-xl);
}

.section--dark {
    padding-top: 20px;
}

.dark-panel {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
    gap: 28px;
    padding: 30px;
    border-radius: var(--radius-xl);
    color: #fff;
    background: linear-gradient(135deg, var(--surface-dark) 0%, var(--surface-dark-2) 100%);
    box-shadow: var(--shadow);
}

.dark-panel .eyebrow {
    color: rgba(255, 255, 255, 0.7);
}

.dark-panel h2,
.dark-grid h3 {
    color: #fff;
}

.dark-panel__copy p,
.dark-grid p {
    color: rgba(255, 255, 255, 0.8);
}

.dark-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}

.dark-grid article {
    padding: 18px;
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.dark-panel__media {
    min-height: 100%;
}

.media-mosaic {
    display: grid;
    grid-template-columns: minmax(0, 1.08fr) minmax(250px, 0.72fr);
    gap: 18px;
}

.mosaic-main,
.mosaic-side {
    overflow: hidden;
    border-radius: var(--radius-xl);
    min-height: 100%;
}

.mosaic-main {
    min-height: 560px;
}

.mosaic-side {
    min-height: 560px;
}

.proof-card,
.cta-band {
    padding: 28px;
    border-radius: var(--radius-xl);
}

.proof-card {
    grid-template-columns: minmax(0, 1.2fr) minmax(260px, 0.8fr);
    align-items: center;
}

.cta-band__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
}

.site-footer {
    padding: 34px 0 44px;
}

.site-footer__inner {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 24px;
    padding-top: 28px;
    border-top: 1px solid rgba(50, 71, 165, 0.12);
}

.footer-copy {
    max-width: 700px;
}

.reveal {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity 0.65s ease, transform 0.65s ease;
}

.reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

@media (max-width: 1180px) {
    .hero__grid {
        grid-template-columns: 1fr;
    }

    .section-nav {
        display: block;
        margin-bottom: 12px;
    }

    .mobile-section-nav {
        display: flex;
    }

    .section-nav__panel {
        display: none;
    }

    .hero-card,
    .split-showcase,
    .dark-panel,
    .proof-card,
    .two-panel-grid,
    .two-column-card,
    .media-mosaic,
    .cta-band__inner {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 920px) {
    .header-nav {
        display: none;
    }

    .menu-toggle {
        display: inline-flex;
    }

    .mobile-menu.is-open {
        display: block;
    }

    .stats-grid,
    .feature-grid,
    .results-grid,
    .principles-grid,
    .mini-grid,
    .dark-grid {
        grid-template-columns: 1fr;
    }

    .mosaic-main,
    .mosaic-side {
        min-height: 360px;
    }

    .hero-card,
    .content-panel,
    .content-card,
    .insight-card,
    .dark-panel,
    .proof-card,
    .cta-band {
        padding: 22px;
    }
}

@media (max-width: 720px) {
    .shell {
        width: min(var(--max), calc(100% - 24px));
    }

    .site-header__inner {
        min-height: 76px;
    }

    .section {
        padding: 26px 0;
    }

    .hero {
        padding-top: 22px;
    }

    .hero-card {
        gap: 20px;
    }

    .hero-copy h1 {
        font-size: clamp(2rem, 10vw, 3rem);
    }

    .hero-subtitle {
        font-size: 1.02rem;
    }

    .btn,
    .back-link {
        width: 100%;
    }

    .hero-actions {
        display: grid;
    }

    .card-media,
    .dark-panel__media,
    .mosaic-main,
    .mosaic-side {
        min-height: 280px;
    }

    .site-footer__inner {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 520px) {
    .mobile-section-nav {
        margin-left: -2px;
        margin-right: -2px;
    }

    .section-heading h2,
    .two-column-card h2,
    .content-panel h2,
    .content-card h2,
    .dark-panel h2,
    .proof-card h2,
    .cta-band h2 {
        font-size: 1.7rem;
    }

    .stat-card,
    .feature-card,
    .result-card,
    .principle-card,
    .two-column-card,
    .content-panel,
    .content-card,
    .insight-card,
    .dark-panel,
    .proof-card,
    .cta-band {
        border-radius: 20px;
    }
}