:root {
    --color-bg: #f8fafc;
    --color-bg-dark: #1e293b;
    --color-bg-darker: #0f172a;
    --color-surface: #ffffff;
    --color-surface-elevated: #ffffff;
    --color-primary: #1e293b;
    --color-primary-hover: #334155;
    --color-accent: #3b82f6;
    --color-accent-hover: #2563eb;
    --color-text: #0f172a;
    --color-text-muted: #475569;
    --color-text-on-dark: #e2e8f0;
    --color-text-on-dark-muted: #94a3b8;
    --color-border: #e2e8f0;
    --color-border-dark: #334155;

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;

    --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
    --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.08);
    --shadow-lg: 0 20px 40px rgba(15, 23, 42, 0.12);

    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

    --container-width: 1140px;
    --section-padding: clamp(3rem, 6vw, 5.5rem);
}

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

html { scroll-behavior: smooth; scroll-padding-top: 80px; }

:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

body {
    margin: 0;
    font-family: var(--font-sans);
    font-size: 17px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

body > main { flex: 1 0 auto; }

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

a { color: var(--color-primary); text-decoration: underline; text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }

h1, h2, h3, h4 { color: var(--color-primary); line-height: 1.2; margin: 0 0 0.6em; font-weight: 700; letter-spacing: -0.01em; }
h1 { font-size: clamp(2rem, 4.5vw, 3rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.6rem, 3vw, 2.25rem); }
h3 { font-size: 1.25rem; }
p { margin: 0 0 1em; }

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4em;
    padding: 0.75em 1.4em;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    border: 1px solid transparent;
    transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease, transform 0.15s ease;
    line-height: 1.2;
    white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn--primary { background-color: var(--color-primary); color: #fff; }
.btn--primary:hover { background-color: var(--color-primary-hover); color: #fff; }
.btn--secondary { background-color: var(--color-accent-hover); color: #fff; }
.btn--secondary:hover { background-color: var(--color-accent); color: #fff; }
.btn--ghost { background-color: transparent; color: var(--color-primary); border-color: var(--color-border); }
.btn--ghost:hover { border-color: var(--color-primary); color: var(--color-primary); }
.btn--large { padding: 0.95em 1.7em; font-size: 1.05rem; }

/* ---------- Site Header ---------- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background-color: rgba(255, 255, 255, 0.92);
    backdrop-filter: saturate(180%) blur(8px);
    border-bottom: 1px solid var(--color-border);
}
.site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
    height: 68px;
}
.site-nav { display: flex; gap: 1.5rem; }
.site-nav a {
    color: var(--color-text);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.97rem;
}
.site-nav a:hover { color: var(--color-primary); text-decoration: underline; text-underline-offset: 6px; text-decoration-thickness: 2px; }
.site-header__cta { padding: 0.55em 1.1em; font-size: 0.95rem; }

.brand {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    text-decoration: none;
    color: var(--color-primary);
    font-weight: 700;
}
.brand__mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background-color: var(--color-primary);
    color: #fff;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.04em;
}
.brand__name { font-size: 1.1rem; letter-spacing: -0.01em; }
.brand--dark { color: var(--color-text-on-dark); }
.brand--dark .brand__mark { background-color: var(--color-border-dark); color: #fff; }

/* ---------- Hero ---------- */
.hero {
    padding: clamp(3rem, 7vw, 5.5rem) 0 clamp(3rem, 6vw, 5rem);
    background:
        radial-gradient(ellipse at 80% -10%, rgba(30, 41, 59, 0.08), transparent 55%),
        radial-gradient(ellipse at -10% 110%, rgba(30, 41, 59, 0.05), transparent 50%),
        var(--color-bg);
}
.hero__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: clamp(2rem, 5vw, 3.5rem);
    align-items: center;
}
.hero__eyebrow {
    display: inline-block;
    padding: 0.35em 0.85em;
    background-color: rgba(30, 41, 59, 0.08);
    color: var(--color-primary);
    border-radius: 999px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 1.25rem;
    letter-spacing: 0.02em;
}
.hero h1 { margin-bottom: 1rem; }
.hero__lead {
    font-size: 1.15rem;
    color: var(--color-text-muted);
    max-width: 38em;
    margin-bottom: 1.75rem;
}
.hero__ctas { display: flex; flex-wrap: wrap; gap: 0.75rem; }
.hero__hint { margin: 1rem 0 0; color: var(--color-text-muted); font-size: 0.9rem; }
.hero__visual {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--color-border);
    background-color: var(--color-surface);
}
.hero__visual img { width: 100%; }

/* ---------- Sections ---------- */
.section { padding: var(--section-padding) 0; }
.section--dark {
    background-color: var(--color-bg-dark);
    color: var(--color-text-on-dark);
}
.section--dark h2, .section--dark h3 { color: #fff; }
.section--dark p { color: var(--color-text-on-dark-muted); }
.section--dark a { color: #fff; }
.section--dark a:hover { color: #fff; }
.section__intro { max-width: 42em; margin: 0 auto 3rem; text-align: center; }
.section__intro p { color: var(--color-text-muted); font-size: 1.05rem; }
.section--dark .section__intro p { color: var(--color-text-on-dark-muted); }
.section__eyebrow,
.feature__eyebrow {
    display: inline-block;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 0.75rem;
}
.section__eyebrow {
    font-size: 0.95rem;
}
.feature__eyebrow { color: var(--color-text-muted); }
.section--dark .section__eyebrow { color: var(--color-text-on-dark); }

/* ---------- Features (Side-by-side) ---------- */
.features {
    display: flex;
    flex-direction: column;
    gap: clamp(3.5rem, 7vw, 6rem);
}

.feature {
    display: grid;
    grid-template-columns: 1fr;
    gap: clamp(1.5rem, 4vw, 2.5rem);
    align-items: center;
}

@media (min-width: 900px) {
    .feature {
        grid-template-columns: 1fr 1.05fr;
        gap: clamp(2.5rem, 5vw, 4rem);
    }
    .feature--reverse .feature__content { order: 2; }
}

.feature__content h3 {
    font-size: clamp(1.45rem, 2.6vw, 1.9rem);
    margin: 0 0 0.7em;
}

.feature__content > p {
    color: var(--color-text-muted);
    font-size: 1rem;
    line-height: 1.65;
    margin: 0 0 1.25rem;
    max-width: 34em;
}

.feature__points {
    margin: 0;
    padding: 0;
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}
.feature__points li {
    position: relative;
    padding-left: 1.45rem;
    color: var(--color-text);
    font-size: 0.97rem;
}
.feature__points li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.6em;
    width: 7px;
    height: 7px;
    background-color: var(--color-primary);
    border-radius: 50%;
}

.feature__media {
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--color-border);
    background-color: var(--color-surface);
    box-shadow: var(--shadow-lg);
}
.feature__media img {
    width: 100%;
    display: block;
}

/* ---------- Mobile Shots ---------- */
.mobile-shots {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    justify-items: center;
    max-width: 900px;
    margin: 0 auto;
}
.mobile-shot {
    margin: 0;
    text-align: center;
    max-width: 280px;
}
.mobile-shot:nth-child(3) { grid-column: 1 / -1; }
.mobile-shot img {
    width: 100%;
    height: auto;
    border-radius: 20px;
    border: 8px solid var(--color-primary);
    box-shadow: var(--shadow-lg);
    background-color: #fff;
}
.mobile-shot figcaption {
    margin-top: 0.85rem;
    color: var(--color-text-muted);
    font-size: 0.95rem;
    font-weight: 500;
}

@media (min-width: 768px) {
    .mobile-shots { grid-template-columns: repeat(3, 1fr); gap: 2rem; }
    .mobile-shot:nth-child(3) { grid-column: auto; }
}

/* ---------- Audience ---------- */
.audience-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.25rem;
}
.audience-card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 1.75rem;
    box-shadow: var(--shadow-sm);
}
.audience-card h3 { color: var(--color-primary); margin-bottom: 0.6em; }
.audience-card p { color: var(--color-text-muted); margin: 0 0 0.75em; }
.audience-card p:last-child { margin: 0; }
.audience-card ul {
    margin: 0;
    padding: 0;
    list-style: none;
}
.audience-card li {
    color: var(--color-text-muted);
    padding-left: 1.4em;
    position: relative;
    margin-bottom: 0.35em;
    font-size: 0.97rem;
}
.audience-card li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--color-accent-hover);
    font-weight: 700;
}

/* ---------- FAQ ---------- */
.faq-list {
    max-width: 720px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}
.faq-item {
    background-color: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--color-border-dark);
    border-radius: var(--radius-md);
    padding: 0;
    transition: background-color 0.15s ease;
}
.faq-item[open] { background-color: rgba(255, 255, 255, 0.06); }
.faq-item summary {
    cursor: pointer;
    padding: 1.1rem 1.25rem;
    font-weight: 600;
    color: #fff;
    list-style: none;
    position: relative;
    padding-right: 3rem;
    font-size: 1.02rem;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
    content: "+";
    position: absolute;
    right: 1.25rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.5rem;
    line-height: 1;
    color: var(--color-text-on-dark);
    transition: transform 0.2s ease;
}
.faq-item[open] summary::after { content: "−"; }
.faq-item__body {
    padding: 0 1.25rem 1.25rem;
    color: var(--color-text-on-dark-muted);
}
.faq-item__body p { margin: 0; }

/* ---------- Contact / Final CTA ---------- */
.contact { text-align: center; }
.contact__lead { color: var(--color-text-muted); max-width: 36em; margin: 0 auto 2rem; font-size: 1.1rem; }
.contact__actions { display: flex; flex-wrap: wrap; gap: 0.75rem; justify-content: center; }
.contact__hint { color: var(--color-text-muted); font-size: 0.9rem; margin-top: 1.25rem; }

/* ---------- Footer ---------- */
.site-footer {
    background-color: var(--color-bg-darker);
    color: var(--color-text-on-dark);
    padding-top: 3rem;
}
.site-footer__inner {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    padding-bottom: 2.5rem;
    border-bottom: 1px solid var(--color-border-dark);
}
.site-footer__tagline { color: var(--color-text-on-dark-muted); max-width: 28em; margin: 0.75rem 0 0; }
.site-footer__nav { display: flex; flex-wrap: wrap; gap: 1.25rem; }
.site-footer__nav a { color: var(--color-text-on-dark); text-decoration: none; font-weight: 500; }
.site-footer__nav a:hover { color: #fff; text-decoration: underline; text-underline-offset: 6px; text-decoration-thickness: 2px; }
.site-footer__bottom {
    padding: 1.25rem 1.5rem;
    color: var(--color-text-on-dark-muted);
    font-size: 0.9rem;
}
.site-footer__bottom p { margin: 0; }

/* ---------- Legal pages ---------- */
.legal {
    padding: clamp(3rem, 6vw, 5rem) 0;
    background-color: var(--color-bg);
}
.legal__content {
    max-width: 760px;
    margin: 0 auto;
    background-color: var(--color-surface);
    padding: clamp(2rem, 5vw, 3rem);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
}
.legal__content h1 { margin-bottom: 1.5rem; }
.legal__content h2 { font-size: 1.25rem; margin-top: 2rem; }
.legal__content h2:first-of-type { margin-top: 0; }
.legal__content h3 { font-size: 1.05rem; margin-top: 1.25rem; margin-bottom: 0.4em; }
.legal__content p, .legal__content li { color: var(--color-text); }
.legal__content strong { color: var(--color-primary); }
.legal__placeholder {
    background-color: rgba(234, 179, 8, 0.08);
    border-left: 3px solid #eab308;
    padding: 0.5rem 0.85rem;
    border-radius: var(--radius-sm);
    color: #854d0e;
    font-style: italic;
}

/* ---------- 404 ---------- */
.notfound {
    min-height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 3rem 1.5rem;
}
.notfound__code {
    font-size: clamp(4rem, 12vw, 7rem);
    color: var(--color-primary);
    margin: 0;
    line-height: 1;
}

/* ---------- Responsive ---------- */
@media (min-width: 640px) {
    .audience-grid { grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
}

@media (min-width: 900px) {
    .hero__grid { grid-template-columns: 1.05fr 1fr; }
    .audience-grid { grid-template-columns: repeat(3, 1fr); }
    .site-footer__inner { grid-template-columns: 1.5fr 1fr; align-items: start; }
    .site-footer__nav { justify-content: flex-end; }
}

@media (max-width: 760px) {
    .site-nav { display: none; }
}

@media (max-width: 480px) {
    .site-header__cta { padding: 0.5em 0.85em; font-size: 0.9rem; }
    .brand__name { display: none; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { transition: none !important; animation: none !important; }
}

/* Visually hidden but accessible */
.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;
}

/* Skip link for keyboard users */
.skip-link {
    position: absolute;
    left: -9999px;
    top: 0;
    background-color: var(--color-primary);
    color: #fff;
    padding: 0.75em 1em;
    z-index: 100;
}
.skip-link:focus { left: 1rem; top: 1rem; outline: 2px solid var(--color-accent); }