:root {
    --color-primary: #0f766e;
    --color-primary-dark: #115e59;
    --color-secondary: #4338ca;
    --color-accent: #f59e0b;
    --color-success: #16a34a;
    --color-background: #f7f9fb;
    --color-surface: #ffffff;
    --color-surface-muted: #eef7f6;
    --color-border: #dbe3ea;
    --color-text: #172033;
    --color-muted: #5d6b82;
    --color-inverse: #ffffff;
    --shadow-soft: 0 18px 45px rgba(23, 32, 51, 0.1);
    --shadow-card: 0 12px 28px rgba(23, 32, 51, 0.08);
    --radius: 8px;
    --container: 1160px;
    --space-1: 8px;
    --space-2: 16px;
    --space-3: 24px;
    --space-4: 32px;
    --space-5: 40px;
    --space-6: 48px;
    --space-8: 64px;
    --font-main: Inter, "Segoe UI", Roboto, Arial, sans-serif;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    color: var(--color-text);
    background: var(--color-background);
    font-family: var(--font-main);
    line-height: 1.6;
    text-rendering: optimizeLegibility;
}

body.menu-open {
    overflow: hidden;
}

img,
svg {
    display: block;
}

img {
    max-width: 100%;
    height: auto;
}

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

button,
input {
    font: inherit;
}

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

:focus-visible {
    outline: 3px solid rgba(245, 158, 11, 0.85);
    outline-offset: 3px;
}

.screen-reader-text,
.skip-link {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.skip-link:focus {
    position: fixed;
    top: var(--space-2);
    left: var(--space-2);
    z-index: 1000;
    width: auto;
    height: auto;
    padding: 10px 14px;
    clip: auto;
    color: var(--color-inverse);
    background: var(--color-text);
    border-radius: var(--radius);
}

.container {
    width: min(100% - 32px, var(--container));
    margin-inline: auto;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, 0.92);
    border-bottom: 1px solid rgba(219, 227, 234, 0.9);
    backdrop-filter: blur(16px);
}

.nav-shell {
    width: min(100% - 32px, var(--container));
    min-height: 72px;
    margin-inline: auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    min-width: 0;
}

.brand-mark {
    display: grid;
    place-items: center;
    width: 44px;
    height: 44px;
    flex: 0 0 44px;
    color: var(--color-inverse);
    font-weight: 900;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    border-radius: var(--radius);
    box-shadow: 0 8px 20px rgba(15, 118, 110, 0.24);
}

.brand-text {
    display: grid;
}

.brand-text strong {
    font-size: 1rem;
    line-height: 1.2;
    letter-spacing: 0;
}

.brand-text span {
    color: var(--color-muted);
    font-size: 0.82rem;
    line-height: 1.3;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.nav-links a {
    padding: 10px 12px;
    color: var(--color-muted);
    font-size: 0.94rem;
    font-weight: 800;
    border-radius: var(--radius);
    transition: color 180ms ease, background 180ms ease;
}

.nav-links a:hover,
.nav-links a:focus-visible {
    color: var(--color-primary-dark);
    background: var(--color-surface-muted);
}

.menu-toggle {
    display: none;
    width: 44px;
    height: 44px;
    padding: 0;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-surface);
    cursor: pointer;
}

.menu-toggle-line {
    display: block;
    width: 20px;
    height: 2px;
    margin: 4px auto;
    background: var(--color-text);
    border-radius: 2px;
    transition: transform 180ms ease, opacity 180ms ease;
}

.menu-toggle[aria-expanded="true"] .menu-toggle-line:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] .menu-toggle-line:nth-child(2) {
    opacity: 0;
}

.menu-toggle[aria-expanded="true"] .menu-toggle-line:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
}

.hero-section {
    padding: var(--space-6) 0 var(--space-5);
    background:
        linear-gradient(180deg, rgba(238, 247, 246, 0.95), rgba(247, 249, 251, 0.96)),
        var(--color-background);
}

.hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 0.95fr) minmax(340px, 1.05fr);
    gap: var(--space-6);
    align-items: center;
}

.breadcrumb ol {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-1);
    padding: 0;
    margin: 0 0 var(--space-3);
    list-style: none;
    color: var(--color-muted);
    font-size: 0.9rem;
}

.eyebrow {
    margin: 0 0 var(--space-1);
    color: var(--color-primary-dark);
    font-size: 0.84rem;
    font-weight: 900;
    letter-spacing: 0;
    text-transform: uppercase;
}

h1,
h2,
h3,
p {
    margin-top: 0;
}

h1 {
    max-width: 760px;
    margin-bottom: var(--space-2);
    font-size: 3.1rem;
    line-height: 1.08;
    letter-spacing: 0;
}

h2 {
    margin-bottom: var(--space-2);
    font-size: 2.1rem;
    line-height: 1.18;
    letter-spacing: 0;
}

h3 {
    margin-bottom: 10px;
    font-size: 1.18rem;
    line-height: 1.28;
    letter-spacing: 0;
}

.hero-intro,
.section-heading p,
.value-card p,
.faq-list p,
.site-footer p {
    color: var(--color-muted);
}

.hero-intro {
    max-width: 700px;
    margin-bottom: var(--space-3);
    font-size: 1.08rem;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    min-height: 44px;
    padding: 10px 16px;
    border: 1px solid transparent;
    border-radius: var(--radius);
    font-weight: 900;
    line-height: 1.2;
    cursor: pointer;
    transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease, border-color 180ms ease;
}

.button svg {
    width: 20px;
    height: 20px;
    flex: 0 0 20px;
    fill: currentColor;
}

.button:hover {
    transform: translateY(-2px);
}

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

.button-primary {
    color: var(--color-inverse);
    background: var(--color-primary);
    box-shadow: 0 12px 24px rgba(15, 118, 110, 0.2);
}

.button-primary:hover {
    background: var(--color-primary-dark);
}

.button-secondary {
    color: var(--color-secondary);
    background: var(--color-surface);
    border-color: var(--color-border);
}

.button-secondary:hover {
    border-color: rgba(67, 56, 202, 0.32);
    box-shadow: var(--shadow-card);
}

.hero-media {
    overflow: hidden;
    border: 1px solid rgba(219, 227, 234, 0.92);
    border-radius: var(--radius);
    box-shadow: var(--shadow-soft);
    background: var(--color-surface);
}

.hero-media img {
    width: 100%;
    aspect-ratio: 7 / 4;
    object-fit: cover;
}

.quick-nav {
    padding: var(--space-3) 0;
    background: var(--color-surface);
    border-block: 1px solid var(--color-border);
}

.quick-nav-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: var(--space-2);
}

.quick-nav a {
    padding: 14px 16px;
    color: var(--color-primary-dark);
    font-weight: 900;
    background: var(--color-surface-muted);
    border: 1px solid rgba(15, 118, 110, 0.14);
    border-radius: var(--radius);
    transition: transform 180ms ease, border-color 180ms ease;
}

.quick-nav a:hover {
    transform: translateY(-2px);
    border-color: rgba(15, 118, 110, 0.38);
}

.ad-section {
    padding: var(--space-4) 0;
    background: var(--color-background);
}

.ad-section .container {
    display: grid;
    gap: 8px;
}

.ad-label {
    margin: 0;
    color: var(--color-muted);
    font-size: 0.78rem;
    font-weight: 700;
    text-align: center;
    text-transform: uppercase;
}

.ad-unit {
    display: block;
    width: 100%;
    min-height: 120px;
    overflow: hidden;
    background:
        linear-gradient(135deg, rgba(15, 118, 110, 0.06), rgba(67, 56, 202, 0.06)),
        var(--color-surface);
    border: 1px dashed rgba(93, 107, 130, 0.34);
    border-radius: var(--radius);
}

.ad-placement-modules,
.ad-placement-before-faq {
    border-block: 1px solid rgba(219, 227, 234, 0.8);
}

.section-block {
    padding: var(--space-8) 0;
}

.soft-band {
    background: var(--color-surface);
    border-block: 1px solid var(--color-border);
}

.section-heading {
    max-width: 760px;
    margin: 0 auto var(--space-5);
    text-align: center;
}

.section-heading.align-left {
    margin-inline: 0;
    text-align: left;
}

.value-card-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-3);
}

.value-card,
.faq-list details,
.update-list article {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-card);
}

.value-card {
    padding: var(--space-3);
    transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.module-learn-button {
    margin-top: auto;
}

.value-card:hover {
    transform: translateY(-4px);
    border-color: rgba(15, 118, 110, 0.28);
    box-shadow: var(--shadow-soft);
}

/* ---- Featured module spotlight (single highlighted module card) ---- */
.module-spotlight-wrap {
    display: grid;
    gap: var(--space-3);
}

.module-spotlight {
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(220px, 0.85fr);
    align-items: stretch;
    overflow: hidden;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-card);
    transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.module-spotlight:hover {
    transform: translateY(-4px);
    border-color: rgba(15, 118, 110, 0.28);
    box-shadow: var(--shadow-soft);
}

.module-spotlight-content {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-5);
}

.module-spotlight-content h3 {
    margin: 10px 0 var(--space-2);
    font-size: 1.5rem;
}

.module-spotlight-content > p {
    margin-bottom: var(--space-3);
    color: var(--color-muted);
}

.module-spotlight-highlights {
    display: grid;
    gap: 10px;
    margin: 0 0 var(--space-4);
    padding: 0;
    list-style: none;
}

.module-spotlight-highlights li {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--color-text);
    font-weight: 700;
    font-size: 0.94rem;
}

.module-spotlight-highlights svg {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    fill: var(--color-primary);
}

.module-spotlight-visual {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-4);
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
}

.module-spotlight-icon {
    display: grid;
    place-items: center;
    width: 120px;
    height: 120px;
    color: var(--color-inverse);
    background: rgba(255, 255, 255, 0.14);
    border-radius: 999px;
    box-shadow: 0 20px 40px rgba(15, 23, 42, 0.25);
}

.module-spotlight-icon svg {
    width: 56px;
    height: 56px;
    fill: currentColor;
}

@media (max-width: 760px) {
    .module-spotlight {
        grid-template-columns: 1fr;
    }

    .module-spotlight-visual {
        padding: var(--space-4) var(--space-3);
    }

    .module-spotlight-icon {
        width: 88px;
        height: 88px;
    }

    .module-spotlight-icon svg {
        width: 42px;
        height: 42px;
    }
}

.card-label {
    display: inline-flex;
    margin-bottom: 14px;
    padding: 5px 8px;
    color: var(--color-primary-dark);
    font-size: 0.78rem;
    font-weight: 900;
    background: var(--color-surface-muted);
    border-radius: 6px;
}

.topic-cloud {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
}

.compact-cloud {
    justify-content: flex-start;
}

.topic-cloud a {
    padding: 10px 12px;
    color: var(--color-text);
    font-size: 0.92rem;
    font-weight: 800;
    background: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    transition: color 180ms ease, border-color 180ms ease, transform 180ms ease;
}

.topic-cloud a:hover {
    color: var(--color-primary-dark);
    border-color: rgba(15, 118, 110, 0.4);
    transform: translateY(-2px);
}

.interview-section {
    padding: var(--space-8) 0;
    color: var(--color-inverse);
    background:
        linear-gradient(135deg, rgba(15, 118, 110, 0.96), rgba(67, 56, 202, 0.92)),
        #172033;
}

.interview-section .eyebrow,
.interview-section .section-heading p {
    color: rgba(255, 255, 255, 0.82);
}

.interview-grid {
    display: grid;
    grid-template-columns: minmax(0, 0.85fr) minmax(320px, 1fr);
    gap: var(--space-4);
    align-items: center;
}

.interview-panel {
    display: grid;
    gap: var(--space-2);
}

.interview-item {
    display: grid;
    grid-template-columns: 52px 1fr;
    gap: var(--space-2);
    align-items: start;
    padding: var(--space-3);
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: var(--radius);
}

.interview-item span {
    display: grid;
    place-items: center;
    width: 44px;
    height: 44px;
    color: var(--color-text);
    font-weight: 900;
    background: var(--color-accent);
    border-radius: var(--radius);
}

.interview-item p {
    margin: 0;
    color: rgba(255, 255, 255, 0.9);
}

.stats-band {
    padding: var(--space-6) 0;
    color: var(--color-inverse);
    background: #172033;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: var(--space-2);
    margin: 0;
}

.stats-grid div {
    padding: var(--space-3);
    text-align: center;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: var(--radius);
}

.stats-grid dt {
    color: var(--color-accent);
    font-size: 2rem;
    font-weight: 900;
    line-height: 1.1;
}

.stats-grid dd {
    margin: 6px 0 0;
    color: rgba(255, 255, 255, 0.78);
}

.update-list {
    display: grid;
    gap: var(--space-2);
    max-width: 860px;
    margin-inline: auto;
}

.update-list article {
    padding: var(--space-3);
    border-left: 4px solid var(--color-primary);
}

.update-list time {
    display: block;
    margin-bottom: 6px;
    color: var(--color-muted);
    font-size: 0.84rem;
    font-weight: 800;
}

.update-list h3 {
    margin-bottom: 0;
}

.update-list h3 a {
    color: inherit;
    text-decoration: none;
}

.update-list h3 a:hover,
.update-list h3 a:focus-visible {
    color: var(--color-primary-dark);
    text-decoration: underline;
}

.faq-section {
    background: linear-gradient(180deg, var(--color-background), #ffffff);
}

.faq-list {
    display: grid;
    gap: var(--space-2);
    max-width: 860px;
    margin-inline: auto;
}

.faq-list details {
    overflow: hidden;
}

.faq-list summary {
    cursor: pointer;
    padding: var(--space-3);
    font-weight: 900;
}

.faq-list summary::marker {
    color: var(--color-primary);
}

.faq-list p {
    margin: 0;
    padding: 0 var(--space-3) var(--space-3);
}

.faq-list ul {
    margin: 0;
    padding: 0 var(--space-3) var(--space-3) calc(var(--space-3) + 1.2em);
    color: var(--color-muted);
}

.faq-list li {
    margin-bottom: 4px;
    line-height: 1.6;
}

.faq-list li:last-child {
    margin-bottom: 0;
}

.site-footer {
    color: rgba(255, 255, 255, 0.74);
    background: #0f172a;
}

.site-footer .ad-section {
    padding: var(--space-4) 0 0;
    background: transparent;
}

.site-footer .ad-label {
    color: rgba(255, 255, 255, 0.58);
}

.site-footer .ad-unit {
    min-height: 90px;
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.18);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.4fr 0.6fr 0.6fr;
    gap: var(--space-4);
    padding: var(--space-6) 0 var(--space-4);
}

.footer-brand {
    color: var(--color-inverse);
    margin-bottom: var(--space-2);
}

.site-footer h2 {
    margin: 0 0 12px;
    color: var(--color-inverse);
    font-size: 1rem;
}

.site-footer a {
    display: table;
    margin-bottom: 8px;
    color: rgba(255, 255, 255, 0.78);
}

.site-footer a:hover {
    color: var(--color-inverse);
}

.site-footer p {
    max-width: 520px;
    margin-bottom: 0;
    color: rgba(255, 255, 255, 0.72);
}

.footer-bottom {
    padding: var(--space-2);
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.footer-bottom p {
    margin: 0;
    max-width: none;
    font-size: 0.9rem;
}

@media (max-width: 980px) {
    .hero-grid,
    .interview-grid,
    .footer-grid {
        grid-template-columns: 1fr;
    }

    h1 {
        font-size: 2.5rem;
    }

    h2 {
        font-size: 1.86rem;
    }

    .quick-nav-grid,
    .stats-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .value-card-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 760px) {
    .nav-shell {
        min-height: 64px;
    }

    .menu-toggle {
        display: block;
    }

    .nav-links {
        position: fixed;
        inset: 65px 16px auto;
        display: grid;
        gap: var(--space-1);
        padding: var(--space-2);
        background: var(--color-surface);
        border: 1px solid var(--color-border);
        border-radius: var(--radius);
        box-shadow: var(--shadow-soft);
        opacity: 0;
        pointer-events: none;
        transform: translateY(-10px);
        transition: opacity 180ms ease, transform 180ms ease;
    }

    .nav-links.is-open {
        opacity: 1;
        pointer-events: auto;
        transform: translateY(0);
    }

    .hero-section {
        padding-top: var(--space-4);
    }

    h1 {
        font-size: 2.08rem;
    }

    h2 {
        font-size: 1.6rem;
    }

    .quick-nav-grid,
    .stats-grid {
        grid-template-columns: 1fr;
    }

    .section-block,
    .interview-section {
        padding: var(--space-6) 0;
    }

    .ad-unit {
        min-height: 100px;
    }

    .interview-item {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container,
    .nav-shell {
        width: min(100% - 24px, var(--container));
    }

    .brand-text span {
        display: none;
    }

    .hero-actions,
    .button {
        width: 100%;
    }

    .button {
        min-height: 48px;
    }
}