:root {
    --color-background: #f5f6fb;
    --color-surface: #ffffff;
    --color-surface-alt: #eef1ff;
    --color-primary: #5a4dff;
    --color-primary-dark: #463cce;
    --color-secondary: #ff7a7a;
    --color-accent: #3ec4d3;
    --color-text: #1d2233;
    --color-text-muted: #5a6075;
    --color-border: rgba(90, 77, 255, 0.16);
    --shadow-soft: 0 20px 45px rgba(70, 54, 189, 0.16);
    --shadow-card: 0 28px 60px -32px rgba(21, 24, 33, 0.45);
    --shadow-thin: 0 1px 2px rgba(20, 24, 35, 0.08), 0 12px 30px -28px rgba(20, 24, 35, 0.35);
    --radius-lg: 32px;
    --radius-md: 22px;
    --radius-sm: 14px;
    --max-width: 1120px;
    --transition-base: all 0.24s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 1.05rem;
    line-height: 1.6;
    color: var(--color-text);
    background:
        linear-gradient(180deg, rgba(245, 246, 251, 0.85) 0%, rgba(245, 246, 251, 0.65) 32%, rgba(245, 246, 251, 0.92) 100%),
        radial-gradient(140% 120% at 0% 0%, rgba(90, 77, 255, 0.12), transparent 60%),
        radial-gradient(140% 120% at 100% 0%, rgba(62, 196, 211, 0.12), transparent 60%),
        var(--color-background);
    min-height: 100vh;
}

img {
    max-width: 100%;
    display: block;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: var(--transition-base);
}

a:hover,
a:focus {
    color: var(--color-primary-dark);
}

h1, h2, h3, h4 {
    font-family: 'Space Grotesk', 'Inter', sans-serif;
    color: var(--color-text);
    margin: 0 0 0.5em;
    line-height: 1.2;
}

h1 {
    font-size: clamp(2.45rem, 3.3vw, 3.4rem);
}

h2 {
    font-size: clamp(1.9rem, 2.5vw, 2.4rem);
}

h3 {
    font-size: 1.55rem;
}

p {
    margin: 0 0 1.1em;
    color: var(--color-text-muted);
}

.container {
    width: min(92%, var(--max-width));
    margin: 0 auto;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.65rem;
    padding: 0.85rem 1.5rem;
    font-weight: 600;
    border-radius: 999px;
    border: none;
    cursor: pointer;
    transition: var(--transition-base);
    font-size: 1rem;
    text-decoration: none;
    background: var(--color-primary);
    color: #fff;
    box-shadow: 0 16px 28px -14px rgba(67, 51, 199, 0.6);
}

.btn:hover,
.btn:focus {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
}

.btn.secondary {
    background: linear-gradient(135deg, #ff9a8b, #ff6b6b);
    box-shadow: 0 16px 28px -14px rgba(255, 139, 130, 0.5);
}

.btn.secondary:hover,
.btn.secondary:focus {
    background: linear-gradient(135deg, #ff7f6a, #ff4f60);
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(245, 246, 251, 0.88);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(90, 77, 255, 0.08);
}

.site-header.shrink {
    background: rgba(245, 246, 251, 0.96);
    box-shadow: 0 16px 40px -28px rgba(21, 24, 33, 0.35);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0;
    gap: 1.5rem;
}

.logo {
    display: flex;
    align-items: baseline;
    gap: 0.45rem;
    font-family: 'Space Grotesk', 'Inter', sans-serif;
    font-weight: 600;
    letter-spacing: 0.02em;
    color: var(--color-text);
}

.logo-mark {
    padding: 0.35rem 0.7rem;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: #fff;
    border-radius: 999px;
    font-size: 0.9rem;
}

.logo-text {
    font-size: 1.05rem;
    color: var(--color-text-muted);
}

.main-nav {
    position: relative;
}

.main-nav ul {
    display: flex;
    align-items: center;
    gap: clamp(1rem, 2vw, 1.8rem);
    list-style: none;
    margin: 0;
    padding: 0;
}

.main-nav a {
    font-weight: 500;
    font-size: 0.98rem;
    color: var(--color-text-muted);
}

.main-nav a:hover,
.main-nav a:focus {
    color: var(--color-primary);
}

.header-cta {
    display: none;
}

.nav-toggle {
    display: none;
    position: relative;
    width: 44px;
    height: 44px;
    border: none;
    background: var(--color-surface);
    border-radius: 14px;
    box-shadow: var(--shadow-thin);
    cursor: pointer;
}

.nav-toggle-bar {
    position: absolute;
    left: 50%;
    width: 20px;
    height: 2px;
    background: var(--color-primary);
    border-radius: 999px;
    transform: translateX(-50%);
    transition: var(--transition-base);
}

.nav-toggle-bar:nth-child(2) { top: 16px; }
.nav-toggle-bar:nth-child(3) { top: 22px; }
.nav-toggle-bar:nth-child(4) { top: 28px; }

.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;
}

main {
    padding-block: 3.5rem 6rem;
}

.section {
    padding-block: clamp(3.5rem, 6vw, 5.25rem);
    position: relative;
}

.section::after {
    content: '';
    position: absolute;
    inset: auto 0 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(90, 77, 255, 0.25), transparent);
    opacity: 0.65;
}

.section:last-of-type::after {
    display: none;
}

.section-panel {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.98) 0%, rgba(243, 244, 255, 0.88) 100%);
    box-shadow: inset 0 1px 0 rgba(90, 77, 255, 0.08), inset 0 -1px 0 rgba(90, 77, 255, 0.06);
}

.section-alt {
    background: linear-gradient(180deg, rgba(238, 241, 255, 0.55) 0%, rgba(238, 241, 255, 0.25) 100%);
}

.section-hero {
    padding-top: clamp(5rem, 10vw, 7.5rem);
    background: linear-gradient(180deg, rgba(90, 77, 255, 0.16) 0%, rgba(245, 246, 251, 0) 70%);
}

.section-header {
    margin-bottom: clamp(2.2rem, 4vw, 3rem);
    display: grid;
    gap: 1rem;
    position: relative;
}

.section-header p {
    max-width: 580px;
}

.section-header::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    transform: translateY(-130%);
    width: 46px;
    height: 4px;
    border-radius: 999px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
}

.section-header h2 {
    padding-left: 0;
    margin-top: 0.6rem;
}

.hero {
    display: grid;
    gap: 3rem;
    align-items: center;
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    inset: -8rem -10% auto -10%;
    height: clamp(420px, 55vw, 520px);
    background:
        radial-gradient(55% 55% at 20% 20%, rgba(90, 77, 255, 0.22), transparent 70%),
        radial-gradient(50% 50% at 80% 30%, rgba(255, 122, 122, 0.18), transparent 65%),
        linear-gradient(135deg, rgba(90, 77, 255, 0.18), rgba(62, 196, 211, 0.16));
    filter: blur(70px);
    z-index: -2;
}

.hero-content {
    max-width: 720px;
    background: rgba(255, 255, 255, 0.92);
    border: 1px solid rgba(90, 77, 255, 0.12);
    border-radius: var(--radius-lg);
    padding: clamp(2rem, 4vw, 2.8rem);
    box-shadow: 0 35px 90px -50px rgba(21, 24, 33, 0.45);
    backdrop-filter: blur(10px);
}

.hero-kicker {
    font-family: 'Space Grotesk', 'Inter', sans-serif;
    font-size: 0.95rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-secondary);
    margin-bottom: 0.85rem;
}

.hero h1 {
    max-width: 640px;
}

.hero p {
    max-width: 640px;
    font-size: 1.08rem;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.content-grid {
    display: grid;
    gap: clamp(1.5rem, 3vw, 2.5rem);
}

.two-column {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.card {
    background: var(--color-surface);
    border-radius: var(--radius-md);
    padding: clamp(1.6rem, 2.8vw, 2.2rem);
    box-shadow: var(--shadow-thin);
    border: 1px solid var(--color-border);
}

.card.highlight {
    background: var(--color-surface-alt);
    box-shadow: var(--shadow-soft);
}

.card h3 {
    margin-bottom: 0.75rem;
}

.essay-text p {
    font-size: 1.05rem;
    color: var(--color-text-muted);
}

.essay-text p strong {
    color: var(--color-text);
}

.essay-summary {
    margin-top: clamp(2rem, 4vw, 3rem);
}

.essay-note {
    background: rgba(90, 77, 255, 0.08);
    border-radius: var(--radius-sm);
    border: 1px solid rgba(90, 77, 255, 0.12);
    padding: 1.2rem 1.5rem;
    max-width: 720px;
    color: var(--color-text-muted);
}

.article-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(260px, 340px);
    gap: clamp(2rem, 4vw, 3.4rem);
    align-items: center;
    position: relative;
}

.article-text {
    display: grid;
    gap: 1.05rem;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.98) 0%, rgba(248, 248, 255, 0.92) 100%);
    border-radius: var(--radius-md);
    border: 1px solid rgba(90, 77, 255, 0.12);
    box-shadow: var(--shadow-thin);
    padding: clamp(1.6rem, 3vw, 2.3rem);
}

.article-text p {
    margin: 0;
    color: var(--color-text-muted);
    font-size: 1.04rem;
    position: relative;
    padding-left: 1.6rem;
}

.article-text p::before {
    content: '';
    position: absolute;
    left: 0.35rem;
    top: 0.55rem;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    box-shadow: 0 8px 18px -10px rgba(90, 77, 255, 0.6);
}

.quote-card {
    position: relative;
    padding: clamp(1.4rem, 2.5vw, 1.9rem);
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, rgba(90, 77, 255, 0.95), rgba(62, 196, 211, 0.78));
    color: #fff;
    box-shadow: var(--shadow-soft);
    min-height: 280px;
    display: grid;
    align-content: center;
    gap: 1rem;
}

.quote-card::before {
    content: '“';
    position: absolute;
    top: 18px;
    left: 28px;
    font-size: 4.5rem;
    font-family: 'Space Grotesk', sans-serif;
    opacity: 0.2;
}

.quote-card p {
    color: rgba(255, 255, 255, 0.92);
    font-size: 1.15rem;
    margin-bottom: 0.85rem;
}

.quote-author {
    font-weight: 600;
    letter-spacing: 0.02em;
}

.history-grid {
    display: grid;
    gap: clamp(1.8rem, 3vw, 2.6rem);
}

.history-card {
    background: var(--color-surface);
    border-radius: var(--radius-md);
    border: 1px solid rgba(90, 77, 255, 0.1);
    padding: clamp(1.8rem, 3vw, 2.4rem);
    box-shadow: var(--shadow-thin);
    position: relative;
    display: grid;
    gap: 0.6rem;
}

.history-card-full {
    grid-column: 1 / -1;
}

.history-card:last-child {
    grid-column: 1 / -1;
}

.history-card::before {
    content: '';
    position: absolute;
    inset: 0 auto auto 0;
    width: 46px;
    height: 46px;
    border-radius: 0 0 24px 0;
    background: linear-gradient(135deg, rgba(90, 77, 255, 0.4), rgba(62, 196, 211, 0.2));
    opacity: 0.9;
    pointer-events: none;
    z-index: 0;
}

.history-card h3 {
    margin: 0;
    font-size: 1.25rem;
    position: relative;
    z-index: 1;
}

.history-card ul {
    padding-left: 1.2rem;
    margin: 0;
    display: grid;
    gap: 0.75rem;
    color: var(--color-text-muted);
    list-style: disc;
    position: relative;
    z-index: 1;
}

.history-card li {
    position: relative;
    padding-left: 0.15rem;
}

.history-trigger {
    background: rgba(255, 192, 149, 0.18);
    border-left: 4px solid rgba(255, 192, 149, 0.9);
    padding: 0.6rem 0.7rem;
    border-radius: var(--radius-sm);
    color: #653c24;
    font-weight: 600;
    display: block;
    margin-top: 0.35rem;
    line-height: 1.55;
}

.trigger-label {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    padding: 0.2rem 0.55rem;
    border-radius: 999px;
    background: rgba(255, 107, 107, 0.12);
    color: #a03030;
    box-shadow: inset 0 0 0 1px rgba(255, 107, 107, 0.35);
}

.quote-inline {
    margin-top: 1.2rem;
    padding-left: 0.6rem;
    border-left: 3px solid rgba(90, 77, 255, 0.2);
    color: var(--color-text);
    font-style: italic;
}

.media-masonry {
    display: grid;
    gap: 1.6rem;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    grid-auto-flow: dense;
}

.media-card {
    background: var(--color-surface);
    border-radius: var(--radius-md);
    padding: clamp(1.8rem, 3vw, 2.3rem);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-thin);
    display: grid;
    gap: 0.85rem;
    height: 100%;
}

.media-card-sm {
    grid-column: span 1;
}

.media-card-lg {
    grid-column: span 2;
}

.media-card h3 {
    font-size: 1.3rem;
    margin-bottom: 0.4rem;
}

.media-card ul {
    margin: 0;
    padding-left: 1.2rem;
    display: grid;
    gap: 0.7rem;
    color: var(--color-text-muted);
    list-style: disc;
}

.essay-page {
    padding-block: clamp(5rem, 9vw, 7rem);
    background:
        radial-gradient(120% 80% at 10% 10%, rgba(90, 77, 255, 0.12), transparent 55%),
        var(--color-background);
}

.essay-section {
    padding-block: 0;
}

.essay-container {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(90, 77, 255, 0.1);
    box-shadow: 0 40px 80px -40px rgba(21, 24, 33, 0.3);
    padding: clamp(2.5rem, 5vw, 3.5rem);
    display: grid;
    gap: 1.3rem;
}

.essay-container h1 {
    margin-bottom: 1rem;
}

.essay-container p {
    margin: 0;
    color: var(--color-text-muted);
    font-size: 1.05rem;
}

.resource-list {
    display: grid;
    gap: 0.85rem;
    padding: 0;
    margin: 0;
    list-style: none;
}

.resource-list li {
    background: var(--color-surface);
    border-radius: var(--radius-sm);
    padding: 1.05rem 1.3rem;
    border: 1px solid rgba(90, 77, 255, 0.08);
    box-shadow: 0 18px 30px -24px rgba(21, 24, 33, 0.4);
}

.resource-list a {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-weight: 500;
}

.resource-list a::after {
    content: '↗';
    font-size: 0.85rem;
    color: var(--color-secondary);
}

.quiz-section {
    background: linear-gradient(135deg, rgba(90, 77, 255, 0.94), rgba(62, 196, 211, 0.82));
    border-radius: var(--radius-lg);
    padding: clamp(2.5rem, 4vw, 3.4rem);
    color: #fff;
    box-shadow: 0 40px 70px -34px rgba(67, 51, 199, 0.5);
}

.quiz-section h2 {
    color: #fff;
}

.quiz-section p {
    color: rgba(255, 255, 255, 0.92);
}

.quiz-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 1.8rem;
}

.btn.light {
    background: rgba(255, 255, 255, 0.15);
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.3);
    box-shadow: none;
}

.btn.light:hover,
.btn.light:focus {
    background: rgba(255, 255, 255, 0.28);
}

.legal-page {
    padding-block: clamp(4rem, 8vw, 6rem);
}

.legal-section {
    background: var(--color-surface);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-thin);
    border: 1px solid var(--color-border);
    padding: clamp(2rem, 4vw, 3rem);
}

.legal-container {
    display: grid;
    gap: 1.4rem;
}

.legal-section h1 {
    margin-bottom: 1.5rem;
}

.legal-section h2 {
    margin-top: 2rem;
}

.site-footer {
    padding: clamp(3rem, 5vw, 4rem) 0 3rem;
    border-top: 1px solid rgba(31, 37, 55, 0.08);
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(12px);
}

.footer-inner {
    display: grid;
    gap: 1.8rem;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    padding-bottom: 2rem;
    border-bottom: 1px solid rgba(31, 37, 55, 0.08);
}

.footer-nav ul {
    padding: 0;
    margin: 0;
    list-style: none;
    display: grid;
    gap: 0.7rem;
}

.footer-nav a {
    color: var(--color-text-muted);
}

.footer-nav a:hover,
.footer-nav a:focus {
    color: var(--color-primary);
}

.copyright {
    text-align: center;
    margin: 1.8rem 0 0;
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

.section-sources {
    padding-bottom: clamp(4rem, 7vw, 5.5rem);
}

@media (max-width: 1080px) {
    .header-cta {
        display: inline-flex;
    }
}

@media (max-width: 920px) {
    .header-inner {
        flex-wrap: wrap;
        justify-content: space-between;
    }

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

    .main-nav ul {
        position: absolute;
        right: 0;
        top: 60px;
        flex-direction: column;
        align-items: flex-start;
        padding: 1.2rem;
        background: var(--color-surface);
        border-radius: var(--radius-md);
        box-shadow: var(--shadow-card);
        min-width: 240px;
        opacity: 0;
        visibility: hidden;
        transform: translateY(-10px);
    }

    .main-nav[data-open="true"] ul {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }

    .main-nav ul li {
        width: 100%;
    }

    .main-nav ul a {
        display: block;
        width: 100%;
        padding: 0.65rem 0.5rem;
    }

    .header-cta {
        display: none;
    }

    .hero {
        padding-block: 3.5rem;
    }

    .hero-content {
        padding: 1.9rem;
    }
}

.media-masonry {
        gap: 1.2rem;
    }

@media (max-width: 640px) {
    body {
        font-size: 1rem;
    }

    .hero {
        gap: 2.5rem;
    }

    .hero-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .quiz-actions {
        flex-direction: column;
    }

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

    .article-layout {
        grid-template-columns: 1fr;
        gap: 2.4rem;
    }

    .quote-card {
        min-height: 240px;
    }

    .media-card-lg {
        grid-column: span 1;
    }
}

@media (min-width: 980px) {
    .history-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .media-masonry {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        align-items: start;
    }

    .media-card-lg {
        grid-column: span 2;
        justify-self: center;
        max-width: 760px;
        width: 100%;
    }
}