:root {
    --prime-bg: rgba(4, 10, 24, 0.78);
    --prime-surface: rgba(10, 18, 34, 0.88);
    --prime-surface-2: rgba(255, 255, 255, 0.05);
    --prime-border: rgba(148, 163, 184, 0.16);
    --prime-border-strong: rgba(148, 163, 184, 0.26);
    --prime-text: #f8fafc;
    --prime-muted: #94a3b8;
    --prime-muted-2: #cbd5e1;
    --prime-primary: #2563eb;
    --prime-primary-hover: #1d4ed8;
    --prime-shadow: 0 28px 80px rgba(2, 6, 23, 0.42);
    --prime-shadow-soft: 0 16px 34px rgba(2, 6, 23, 0.20);
}

.prime-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 18px 0 0;
    background: linear-gradient(180deg, rgba(2, 6, 23, 0.74) 0%, rgba(2, 6, 23, 0.30) 100%);
    backdrop-filter: blur(18px);
}

.prime-header-row {
    position: relative;
    min-height: 86px;
    display: grid;
    grid-template-columns: auto 1fr;
    align-items: center;
    gap: 28px;
    padding: 18px 22px;
    border-radius: 30px;
    background:
        radial-gradient(circle at 0% 0%, rgba(37, 99, 235, 0.16), transparent 22%),
        linear-gradient(180deg, rgba(11, 18, 32, 0.97) 0%, rgba(7, 13, 26, 0.97) 100%);
    border: 1px solid var(--prime-border);
    box-shadow: var(--prime-shadow);
}

.prime-brand {
    display: flex;
    align-items: center;
    gap: 16px;
    min-width: 0;
}

.prime-brand-mark {
    width: 56px;
    height: 56px;
    border-radius: 18px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: #ffffff;
    font-size: 22px;
    font-weight: 800;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, #2563eb 0%, #60a5fa 100%);
    box-shadow:
        0 18px 34px rgba(37, 99, 235, 0.28),
        inset 0 1px 0 rgba(255, 255, 255, 0.18);
}

.prime-brand-copy {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.prime-brand-copy strong {
    color: var(--prime-text);
    font-size: 21px;
    line-height: 1.02;
    letter-spacing: -0.04em;
    font-weight: 800;
}

.prime-brand-copy small {
    margin-top: 6px;
    color: var(--prime-muted);
    font-size: 12px;
    line-height: 1.35;
    font-weight: 600;
}

.prime-menu-toggle {
    display: none;
    width: 48px;
    height: 48px;
    margin-left: auto;
    border-radius: 16px;
    border: 1px solid var(--prime-border);
    background: rgba(255, 255, 255, 0.04);
    cursor: pointer;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 5px;
}

.prime-menu-toggle span {
    width: 18px;
    height: 2px;
    border-radius: 999px;
    background: #ffffff;
    display: block;
}

.prime-header-panel {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 22px;
    min-width: 0;
}

.prime-nav {
    display: flex;
    align-items: center;
    gap: 30px;
    flex-wrap: wrap;
}

.prime-nav a {
    position: relative;
    color: var(--prime-muted-2);
    font-size: 14px;
    font-weight: 700;
    letter-spacing: -0.01em;
    padding: 10px 0;
    transition: color 0.22s ease, transform 0.22s ease;
}

.prime-nav a::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: -1px;
    height: 2px;
    border-radius: 999px;
    background: linear-gradient(90deg, #2563eb 0%, #60a5fa 100%);
    transform: scaleX(0);
    transform-origin: center;
    transition: transform 0.24s ease;
}

.prime-nav a:hover {
    color: #ffffff;
    transform: translateY(-1px);
}

.prime-nav a:hover::after {
    transform: scaleX(1);
}

.prime-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.prime-lang {
    position: relative;
}

.prime-lang-trigger {
    min-height: 48px;
    padding: 0 14px 0 10px;
    border-radius: 16px;
    border: 1px solid var(--prime-border);
    background: rgba(255, 255, 255, 0.04);
    color: #ffffff;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    transition:
        background 0.22s ease,
        border-color 0.22s ease,
        transform 0.22s ease,
        box-shadow 0.22s ease;
}

.prime-lang-trigger:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--prime-border-strong);
    transform: translateY(-1px);
    box-shadow: var(--prime-shadow-soft);
}

.prime-lang-trigger svg {
    width: 18px;
    height: 18px;
    color: var(--prime-muted-2);
    transition: transform 0.22s ease;
}

.prime-lang.is-open .prime-lang-trigger svg {
    transform: rotate(180deg);
}

.prime-lang-current {
    min-width: 36px;
    height: 30px;
    padding: 0 8px;
    border-radius: 10px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(37, 99, 235, 0.18);
    color: #bfdbfe;
    font-size: 12px;
    font-weight: 800;
    letter-spacing: 0.03em;
}

.prime-lang-label {
    color: var(--prime-text);
    font-size: 14px;
    font-weight: 700;
}

.prime-lang-menu {
    position: absolute;
    top: calc(100% + 12px);
    right: 0;
    min-width: 230px;
    padding: 10px;
    border-radius: 18px;
    background: rgba(10, 18, 34, 0.99);
    border: 1px solid var(--prime-border);
    box-shadow: 0 28px 56px rgba(2, 6, 23, 0.46);
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition:
        opacity 0.22s ease,
        visibility 0.22s ease,
        transform 0.22s ease;
}

.prime-lang.is-open .prime-lang-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.prime-lang-menu a {
    display: grid;
    grid-template-columns: 42px 1fr;
    align-items: center;
    gap: 10px;
    padding: 12px;
    border-radius: 12px;
    color: var(--prime-muted-2);
    transition:
        background 0.22s ease,
        color 0.22s ease,
        transform 0.22s ease;
}

.prime-lang-menu a:hover {
    background: rgba(255, 255, 255, 0.06);
    color: #ffffff;
    transform: translateX(2px);
}

.prime-lang-menu a.active {
    background: rgba(37, 99, 235, 0.16);
    color: #ffffff;
}

.prime-lang-menu a span {
    width: 42px;
    height: 34px;
    border-radius: 10px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.06);
    color: #bfdbfe;
    font-size: 12px;
    font-weight: 800;
    letter-spacing: 0.03em;
}

.prime-lang-menu a small {
    color: inherit;
    font-size: 14px;
    font-weight: 700;
}

.prime-btn {
    min-height: 48px;
    padding: 0 18px;
    border-radius: 16px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    white-space: nowrap;
    font-size: 14px;
    font-weight: 800;
    letter-spacing: -0.01em;
    transition:
        transform 0.22s ease,
        box-shadow 0.22s ease,
        background 0.22s ease,
        border-color 0.22s ease;
}

.prime-btn:hover {
    transform: translateY(-1px);
}

.prime-btn-ghost {
    border: 1px solid var(--prime-border);
    background: rgba(255, 255, 255, 0.04);
    color: #ffffff;
}

.prime-btn-ghost:hover {
    background: rgba(255, 255, 255, 0.08);
    box-shadow: var(--prime-shadow-soft);
}

.prime-btn-primary {
    border: 1px solid transparent;
    background: linear-gradient(135deg, var(--prime-primary) 0%, var(--prime-primary-hover) 100%);
    color: #ffffff;
    box-shadow: 0 18px 30px rgba(37, 99, 235, 0.26);
}

.prime-btn-primary:hover {
    background: linear-gradient(135deg, var(--prime-primary-hover) 0%, #1e40af 100%);
    box-shadow: 0 22px 34px rgba(37, 99, 235, 0.30);
}

@media (max-width: 1180px) {
    .prime-header-row {
        grid-template-columns: auto auto;
    }

    .prime-menu-toggle {
        display: inline-flex;
    }

    .prime-header-panel {
        grid-column: 1 / -1;
        display: none;
        width: 100%;
        flex-direction: column;
        align-items: stretch;
        gap: 14px;
        margin-top: 6px;
        padding-top: 14px;
        border-top: 1px solid rgba(148, 163, 184, 0.12);
    }

    .prime-header-panel.is-open {
        display: flex;
        animation: primeHeaderFade 0.22s ease;
    }

    .prime-nav,
    .prime-actions {
        width: 100%;
        justify-content: flex-start;
    }

    .prime-lang-menu {
        right: auto;
        left: 0;
    }
}

@keyframes primeHeaderFade {
    from {
        opacity: 0;
        transform: translateY(-6px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 760px) {
    .prime-header {
        padding-top: 10px;
    }

    .prime-header-row {
        padding: 14px;
        border-radius: 22px;
        gap: 14px;
    }

    .prime-brand-mark {
        width: 50px;
        height: 50px;
        border-radius: 16px;
        font-size: 20px;
    }

    .prime-brand-copy strong {
        font-size: 18px;
    }

    .prime-brand-copy small {
        font-size: 11px;
    }

    .prime-nav {
        flex-direction: column;
        align-items: stretch;
        gap: 0;
    }

    .prime-nav a {
        width: 100%;
        padding: 13px 0;
    }

    .prime-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .prime-lang,
    .prime-lang-trigger,
    .prime-btn {
        width: 100%;
    }

    .prime-lang-trigger {
        justify-content: space-between;
    }

    .prime-lang-menu {
        width: 100%;
        min-width: 0;
    }
}