/* Explain: Styling for site components like headers, buttons, frames, and reveal animations. */
.site-header {
    background: linear-gradient(180deg, rgba(250, 249, 246, 0.9), rgba(250, 249, 246, 0.6));
    backdrop-filter: blur(18px);
}

.section-kicker {
    display: inline-flex;
    align-items: center;
    gap: 0.7rem;
    color: var(--sage-dark);
    font-size: 0.76rem;
    font-weight: 700;
    letter-spacing: 0.22em;
    text-transform: uppercase;
}

.section-kicker::before {
    display: inline-block;
    width: 2.4rem;
    height: 1px;
    background: var(--accent-color);
    content: "";
}

.glass-panel {
    border: 1px solid var(--glass-border);
    background: linear-gradient(145deg, rgba(250, 249, 246, 0.78), rgba(255, 255, 255, 0.48));
    box-shadow: var(--shadow-soft);
    backdrop-filter: blur(18px);
}

.book-cover-frame {
    position: relative;
    overflow: hidden;
    border-radius: 0.7rem 0.7rem 0.5rem 0.5rem;
    box-shadow: 0 34px 74px rgba(26, 67, 64, 0.3);
}

.book-cover-frame::after {
    position: absolute;
    inset: 0;
    border-radius: inherit;
    box-shadow: inset 0 0 0 1px rgba(250, 249, 246, 0.18);
    content: "";
    pointer-events: none;
}

.book-cover-frame img {
    display: block;
    width: 100%;
    height: auto;
}

.arch-frame {
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(26, 67, 64, 0.38);
    background: var(--surface-color);
    box-shadow: var(--shadow-soft);
}

.arch-frame::after {
    position: absolute;
    inset: 1.1rem;
    border: 1px solid rgba(250, 249, 246, 0.62);
    border-radius: inherit;
    content: "";
    pointer-events: none;
}

.arch-frame-medium {
    height: 580px;
    max-width: 430px;
    border-radius: 999px 999px 2.1rem 2.1rem;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    justify-content: flex-start;
    gap: 0.6rem;
    border-radius: 999px;
    background: var(--btn-hebrew-bg);
    padding: 1rem 2.4rem;
    color: var(--text-color);
    font-size: 1.05rem;
    font-weight: 700;
    box-shadow: var(--shadow-button);
    transition: transform 300ms ease, background-color 300ms ease;
}

.cta-button:hover {
    background: var(--btn-hebrew-hover);
    transform: scale(1.04);
}

.cta-button-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: flex-start;
    gap: 0.6rem;
    border: 1.5px solid var(--btn-stein-hover);
    border-radius: 999px;
    background: var(--btn-stein-bg);
    padding: 1rem 2.4rem;
    color: var(--text-color);
    font-size: 1.05rem;
    font-weight: 700;
    transition: transform 300ms ease, background-color 300ms ease, color 300ms ease;
}

.cta-button-secondary:hover {
    background: var(--btn-stein-hover);
    color: var(--text-color);
    transform: scale(1.04);
}

.theme-chip {
    display: inline-flex;
    align-items: center;
    border: 1px solid var(--glass-border);
    border-radius: 999px;
    background: var(--glass-bg);
    padding: 0.5rem 1.15rem;
    color: var(--text-color);
    font-size: 0.85rem;
    font-weight: 600;
}

.proof-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.4rem;
    border: 1px solid var(--glass-border);
    border-radius: 1.4rem;
    background: var(--glass-bg);
    padding: 1.4rem 1rem;
    text-align: center;
    backdrop-filter: blur(12px);
}

.mobile-book-bar {
    position: fixed;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 45;
    border-top: 1px solid var(--glass-border);
    background: rgba(250, 249, 246, 0.9);
    padding: 0.75rem 1rem calc(0.75rem + env(safe-area-inset-bottom));
    backdrop-filter: blur(18px);
}

.js-reveal {
    opacity: 0;
    transform: translateY(26px);
    transition: opacity 700ms ease, transform 700ms ease;
}

.js-reveal.is-visible {
    opacity: 1;
    transform: none;
}

@media (prefers-reduced-motion: reduce) {
    .js-reveal {
        opacity: 1;
        transform: none;
        transition: none;
    }
}

@media (max-width: 767px) {
    .section-kicker::before {
        width: 1.6rem;
    }

    .arch-frame-medium {
        height: 400px;
        max-width: 300px;
    }
}