/* ====== Root & Base (YaroNetic FAQ) ====== */
:root {
    color-scheme: dark;
    --bg: #05030d;
    --text: #eef3ff;
    --muted: #b6bcdf;

    --accent-1: #73f3ff;
    --accent-2: #ff7cfb;
    --accent-3: #ffa84e;

    --glass-bg: rgba(12, 11, 25, 0.58);
    --glass-border: rgba(255, 255, 255, 0.18);
    --glass-shadow:
        0 16px 32px rgba(0, 0, 0, 0.65),
        inset 0 0 24px rgba(255, 255, 255, 0.05);

    --radius: 22px;
    --gap: clamp(2rem, 4vw, 3.5rem);

    font-family: "Space Grotesk", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
    margin: 0;
    min-height: 100vh;
    background: radial-gradient(circle at top, #070316 0%, #020009 55%, #02020a 100%);
    color: var(--text);
    line-height: 1.7;
    overflow-x: hidden;
}

/* Глубокий фон */
body::before {
    content: "";
    position: fixed;
    inset: -20%;
    pointer-events: none;
    z-index: -1;
    background:
        radial-gradient(circle at 18% 20%, rgba(115, 243, 255, 0.14), transparent 55%),
        radial-gradient(circle at 80% 10%, rgba(255, 124, 251, 0.12), transparent 50%),
        radial-gradient(circle at 70% 80%, rgba(255, 168, 78, 0.1), transparent 55%);
    filter: blur(55px);
}

/* Контейнеры */
main, section {
    padding: var(--gap) clamp(1.3rem, 5vw, 4.5rem);
}

/* Заголовки */
h1, h2, h3 {
    font-weight: 600;
    margin: 0 0 1.2rem;
    letter-spacing: 0.04em;
}

h1 {
    font-size: clamp(2.5rem, 8vw, 4rem);
    text-transform: uppercase;
    background: linear-gradient(120deg, #fff, var(--accent-1), var(--accent-2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

h2 {
    font-size: clamp(2rem, 6vw, 3rem);
    text-align: center;
    background: linear-gradient(120deg, #fff, #b9c2ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

h3 {
    font-size: 1.3rem;
    color: var(--text);
}

p {
    margin: 0 0 1rem;
    color: var(--muted);
}

/* ====== Hero ====== */
.hero {
    min-height: 50vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    padding-block: clamp(4rem, 11vh, 7rem);
}

.hero::after {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 30%, rgba(115, 243, 255, 0.15), transparent 70%);
    filter: blur(120px);
    z-index: -1;
}

.hero-content {
    max-width: 780px;
    margin: 0 auto;
}

.subtitle {
    font-size: 1.1rem;
    color: var(--muted);
    max-width: 640px;
    margin: 1rem auto 0;
}

/* ====== Карточки FAQ ====== */
.faq-section {
    max-width: 900px;
    margin: 0 auto;
}

details {
    background: var(--glass-bg);
    border-radius: var(--radius);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    padding: 1.1rem 1.4rem;
    margin-bottom: 1rem;
    backdrop-filter: blur(20px) saturate(170%);
    transition: border-color 0.3s, background 0.3s, transform 0.3s;
}

details[open] {
    border-color: var(--accent-1);
    background: rgba(13, 18, 40, 0.85);
    transform: translateY(-3px);
}

summary {
    cursor: pointer;
    list-style: none;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--text);
}

summary::-webkit-details-marker { display: none; }

details p {
    margin-top: 0.9rem;
    color: var(--muted);
}

/* ====== Доп. карточки (если есть) ====== */
.card-grid {
    display: grid;
    gap: var(--gap);
    width: 100%;
    margin-top: 2.5rem;
}

.card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    padding: 1.8rem;
    box-shadow: var(--glass-shadow);
    backdrop-filter: blur(20px) saturate(170%);
    transition: transform 0.35s, box-shadow 0.35s, border-color 0.3s;
}

.card:hover {
    transform: translateY(-6px);
    border-color: rgba(255, 255, 255, 0.26);
    box-shadow:
        0 24px 50px rgba(0, 0, 0, 0.75),
        inset 0 0 28px rgba(255, 255, 255, 0.04);
}

/* ====== CTA ====== */
.cta {
    text-align: center;
    padding: clamp(3rem, 8vw, 5rem) clamp(1rem, 5vw, 4rem);
    margin-top: 3rem;
    background: rgba(5, 4, 14, 0.85);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius);
    backdrop-filter: blur(18px);
}

.cta p {
    max-width: 600px;
    margin: 0.4rem auto 1.8rem;
}

.cta-button {
    display: inline-block;
    padding: 1rem 2.8rem;
    border-radius: 999px;
    background: linear-gradient(120deg, var(--accent-1), var(--accent-2));
    color: #000;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    text-decoration: none;
    transition: transform 0.3s, box-shadow 0.3s;
    box-shadow: 0 14px 32px rgba(0, 0, 0, 0.65);
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 18px 42px rgba(0, 0, 0, 0.8);
}

/* ====== Соцсети ====== */
.social-links {
    display: flex;
    justify-content: center;
    gap: 1.2rem;
    flex-wrap: wrap;
    margin-top: 2rem;
}

.social-links a {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.22);
    background: rgba(7, 6, 18, 0.85);
    color: var(--accent-1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    text-decoration: none;
    transition: transform 0.3s, background 0.3s, border-color 0.3s, color 0.3s;
    box-shadow: 0 12px 25px rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(14px);
}

.social-links a:hover {
    transform: translateY(-4px) scale(1.05);
    background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
    color: #000;
    border-color: transparent;
}

/* ====== Footer ====== */
.footer {
    text-align: center;
    padding: 1.5rem 1rem;
    font-size: 0.86rem;
    color: var(--muted);
    border-top: 1px solid rgba(255, 255, 255, 0.12);
    background: rgba(5, 3, 13, 0.92);
    backdrop-filter: blur(18px);
    margin-top: 4rem;
}

.footer a {
    color: var(--accent-1);
    text-decoration: none;
}

.footer a:hover { text-decoration: underline; }

/* ====== Responsive ====== */
@media (max-width: 768px) {
    main, section { padding: 3rem 1.2rem; }
    .hero { padding-block: 3.5rem; }
    h1 { font-size: 2.2rem; }
    h2 { font-size: 1.8rem; }
    .card-grid { grid-template-columns: 1fr; }
    details { padding: 1rem 1.1rem; }
}

@media (max-width: 480px) {
    h1 { font-size: 1.8rem; }
    h2 { font-size: 1.5rem; }
    summary { font-size: 0.9rem; }
}

/* Respect prefers-reduced-motion */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}