:root {
    color-scheme: dark;
    --color-bg: #1f2738;
    --color-bg-deep: #151c2a;
    --color-surface: rgba(36, 48, 69, 0.84);
    --color-surface-strong: #28364d;
    --color-primary: #89c4ff;
    --color-primary-strong: #b8dcff;
    --color-white: #f8fbff;
    --color-text: rgba(238, 245, 255, 0.78);
    --color-muted: rgba(226, 236, 250, 0.58);
    --color-border: rgba(174, 203, 235, 0.16);
    --shadow-phone: 0 2rem 5rem rgba(3, 8, 18, 0.52);
    --radius-lg: 1.5rem;
    --radius-md: 1rem;
    --container: min(1160px, calc(100% - 3rem));
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    min-width: 320px;
    background-color: var(--color-bg);
    background-image: linear-gradient(rgba(26, 35, 51, 0.9), rgba(26, 35, 51, 0.96)), url('background.webp');
    background-repeat: repeat;
    background-size: auto, 980px;
    color: var(--color-white);
    font-family: 'Source Sans 3', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 18px;
    line-height: 1.65;
    text-rendering: optimizeLegibility;
}

img { display: block; max-width: 100%; }
a { color: var(--color-primary); text-underline-offset: 0.2em; }
a:hover { color: var(--color-primary-strong); }
a:focus-visible, summary:focus-visible { outline: 3px solid var(--color-primary); outline-offset: 4px; border-radius: 0.25rem; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { color: var(--color-white); line-height: 1.08; }
h1 { margin-bottom: 1rem; font-family: 'Koulen', sans-serif; font-size: clamp(4rem, 9vw, 7.5rem); font-weight: 400; letter-spacing: 0.01em; }
h2 { margin-bottom: 1.25rem; font-size: clamp(2.1rem, 4vw, 3.6rem); letter-spacing: -0.035em; }
h3 { margin-bottom: 0.65rem; font-size: 1.25rem; }
p { color: var(--color-text); }

.container { width: var(--container); margin-inline: auto; }
.site-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 5rem;
    font-size: 0.95rem;
}
.site-header__brand { color: var(--color-white); font-weight: 700; text-decoration: none; }
.site-header__link { text-decoration: none; }
.eyebrow {
    margin-bottom: 0.8rem;
    color: var(--color-primary);
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.13em;
    text-transform: uppercase;
}

.hero {
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(270px, 0.65fr);
    gap: clamp(3rem, 8vw, 7rem);
    align-items: center;
    min-height: calc(100svh - 5rem);
    padding-block: 3rem 6rem;
}
.hero__copy { max-width: 720px; }
.hero__headline { max-width: 650px; margin-bottom: 1rem; color: var(--color-white); font-size: clamp(1.4rem, 2.7vw, 2.1rem); font-weight: 600; line-height: 1.25; }
.hero__lead { max-width: 680px; font-size: 1.08rem; }
.hero__highlights { display: grid; gap: 0.65rem; margin: 1.6rem 0 1.8rem; padding: 0; list-style: none; color: var(--color-text); }
.hero__highlights li { position: relative; padding-left: 1.35rem; }
.hero__highlights li::before { position: absolute; left: 0; color: var(--color-primary); content: '•'; }
.hero__highlights strong { color: var(--color-white); }
.hero__actions { display: flex; flex-wrap: wrap; gap: 1rem 1.4rem; align-items: center; }
.app-store-link { display: inline-block; border-radius: 0.55rem; }
.app-store-link img { width: 150px; height: 50px; }
.text-link { font-weight: 700; text-decoration-thickness: 1px; }
.hero__pricing { margin: 0.85rem 0 0; color: var(--color-muted); font-size: 0.9rem; }

.phone-shot { margin: 0; }
.phone-shot img { width: 100%; height: auto; filter: drop-shadow(var(--shadow-phone)); }
.phone-shot--hero { width: min(100%, 360px); justify-self: end; }
.phone-shot--secondary { width: min(100%, 350px); justify-self: end; }
.phone-shot figcaption { margin-top: 1rem; color: var(--color-muted); font-size: 0.88rem; text-align: center; }

.section { padding-block: clamp(5rem, 10vw, 9rem); }
.section--surface {
    border-block: 1px solid var(--color-border);
    background: linear-gradient(135deg, rgba(46, 63, 89, 0.82), rgba(27, 37, 54, 0.82));
    backdrop-filter: blur(8px);
}
.section__intro { max-width: 760px; margin-bottom: 3rem; font-size: 1.12rem; }
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin: 0; padding: 0; list-style: none; }
.steps li, .feature-grid article, .details-grid article {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: rgba(20, 28, 42, 0.44);
    padding: clamp(1.35rem, 3vw, 2rem);
}
.steps__number { display: block; margin-bottom: 2rem; color: var(--color-primary); font-size: 0.85rem; font-weight: 700; letter-spacing: 0.12em; }
.steps p, .feature-grid p, .details-grid p { margin-bottom: 0; }

.feature-layout { display: grid; grid-template-columns: minmax(0, 1fr) minmax(260px, 0.42fr); gap: clamp(3rem, 8vw, 7rem); align-items: center; }
.feature-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; margin-top: 2.5rem; }
.feature-grid article { background: var(--color-surface); }

.section--privacy { border-block: 1px solid rgba(137, 196, 255, 0.24); background: rgba(27, 39, 57, 0.92); }
.privacy-grid { display: grid; grid-template-columns: minmax(0, 0.9fr) minmax(0, 1fr); gap: clamp(2.5rem, 8vw, 7rem); }
.privacy-grid__copy > p { font-size: 1.12rem; }
.check-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0.65rem 1.5rem; margin: 1.8rem 0; padding: 0; list-style: none; color: var(--color-text); }
.check-list li::before { margin-right: 0.55rem; color: var(--color-primary); content: '✓'; }

.details-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; }
.details-grid article { background: var(--color-surface); }
.details-grid h2 { font-size: clamp(1.8rem, 3vw, 2.6rem); }

.faq { display: grid; grid-template-columns: minmax(220px, 0.55fr) minmax(0, 1fr); gap: clamp(3rem, 8vw, 7rem); }
.faq__items { border-top: 1px solid var(--color-border); }
details { border-bottom: 1px solid var(--color-border); padding-block: 1.2rem; }
summary { position: relative; padding-right: 2rem; color: var(--color-white); cursor: pointer; font-size: 1.1rem; font-weight: 700; list-style: none; }
summary::-webkit-details-marker { display: none; }
summary::after { position: absolute; right: 0; color: var(--color-primary); content: '+'; font-size: 1.4rem; line-height: 1; }
details[open] summary::after { content: '−'; }
details p { margin: 0.8rem 0 0; padding-right: 2rem; }

.cta { padding-block: clamp(6rem, 12vw, 10rem); text-align: center; }
.cta h2 { max-width: 850px; margin-inline: auto; }
.button { display: inline-flex; align-items: center; gap: 0.45rem; margin-top: 1rem; border-radius: 999px; background: var(--color-primary); color: var(--color-bg-deep); padding: 0.9rem 1.4rem; font-weight: 800; text-decoration: none; }
.button:hover { background: var(--color-primary-strong); color: var(--color-bg-deep); }
.button--secondary { border: 1px solid var(--color-border); background: var(--color-surface-strong); color: var(--color-white); }
.button--secondary:hover { background: #32445f; color: var(--color-white); }

.policy-page { background-attachment: fixed; }
.policy { max-width: 900px; padding-block: 4rem 8rem; }
.policy article { border: 1px solid var(--color-border); border-radius: var(--radius-lg); background: rgba(21, 29, 43, 0.88); padding: clamp(1.5rem, 5vw, 4rem); box-shadow: 0 2rem 5rem rgba(3, 8, 18, 0.25); }
.policy__header { border-bottom: 1px solid var(--color-border); margin-bottom: 2.5rem; padding-bottom: 2.5rem; }
.policy__header h1 { margin-bottom: 0.5rem; font-family: 'Source Sans 3', system-ui, sans-serif; font-size: clamp(2.7rem, 7vw, 4.8rem); font-weight: 700; letter-spacing: -0.045em; }
.policy__meta { margin-bottom: 0.25rem; color: var(--color-muted); font-size: 0.95rem; }
.policy__header .button { margin-top: 1.5rem; }
.policy__intro { margin-bottom: 3rem; border-left: 3px solid var(--color-primary); padding-left: 1.25rem; }
.policy__intro p { margin: 0; color: var(--color-white); font-size: 1.12rem; }
.policy section { scroll-margin-top: 2rem; }
.policy section + section { margin-top: 2.6rem; }
.policy section h2 { margin-bottom: 0.65rem; font-size: clamp(1.35rem, 3vw, 1.75rem); letter-spacing: -0.02em; }
.policy section p { margin-bottom: 0; }

.site-footer { display: flex; justify-content: space-between; gap: 2rem; border-top: 1px solid var(--color-border); padding-block: 2rem 3rem; font-size: 0.92rem; }
.site-footer p { margin: 0; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 1.25rem; }

@media (max-width: 900px) {
    :root { --container: min(100% - 2rem, 720px); }
    .hero { grid-template-columns: 1fr; min-height: auto; padding-block: 3rem 5rem; }
    .phone-shot--hero { width: min(70vw, 340px); justify-self: center; }
    .feature-layout, .privacy-grid, .faq { grid-template-columns: 1fr; }
    .phone-shot--secondary { width: min(70vw, 340px); justify-self: center; }
    .steps { grid-template-columns: 1fr; }
}

@media (max-width: 620px) {
    body { font-size: 17px; background-size: auto, 700px; }
    .site-header__link { display: none; }
    .hero { gap: 2.5rem; }
    .hero__actions { align-items: flex-start; flex-direction: column; }
    .hero__pricing span { display: none; }
    .hero__pricing { display: grid; gap: 0.15rem; }
    .feature-grid, .details-grid, .check-list { grid-template-columns: 1fr; }
    .site-footer { align-items: flex-start; flex-direction: column; }
    .policy { padding-block: 2rem 5rem; }
    .policy article { border-inline: 0; border-radius: 0; margin-inline: -1rem; padding-inline: 1rem; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
}