/* Premium header — shared across all pages */
html {
    scroll-padding-top: 110px;
}

.premium-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 20px;
    transition: padding 0.3s ease;
    pointer-events: none;
}

.premium-header.scroll-header {
    padding: 10px 20px;
}

.p-nav-container {
    max-width: var(--container-width, 1440px);
    margin: 0 auto;
    background: rgba(20, 20, 20, 0.6);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 24px;
    pointer-events: auto;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    transition: background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.premium-header.scroll-header .p-nav-container {
    background: rgba(15, 15, 15, 0.85);
    border-color: rgba(255, 255, 255, 0.1);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}

.p-nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--color-text, #fff);
    flex-shrink: 0;
}

.p-nav-logo-img {
    height: 40px;
    width: auto;
    transition: transform 0.3s ease;
}

.p-nav-logo:hover .p-nav-logo-img {
    transform: scale(1.05);
}

.p-nav-logo-text {
    display: flex;
    flex-direction: column;
}

.p-nav-logo-text h1 {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.02em;
}

.p-nav-tagline {
    font-size: 0.65rem;
    color: var(--color-text-muted, #aaa);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.p-nav-menu {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.p-nav-link {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    color: var(--color-text-muted, #aaa);
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
    border-radius: 12px;
    transition: color 0.2s ease, background 0.2s ease, transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.p-nav-link:hover {
    color: var(--color-text, #fff);
    background: rgba(255, 255, 255, 0.05);
}

.p-nav-link.active-link,
.p-nav-link.active {
    color: var(--color-accent, #bdfc00);
    background: rgba(189, 252, 0, 0.05);
}

.p-nav-link--ai {
    color: var(--color-text, #fff);
    background: linear-gradient(90deg, rgba(189, 252, 0, 0.1) 0%, rgba(189, 252, 0, 0.05) 100%);
    border: 1px solid rgba(189, 252, 0, 0.2);
    box-shadow: 0 0 15px rgba(189, 252, 0, 0.05);
}

.p-nav-link--ai:hover,
.p-nav-link--ai.active-link,
.p-nav-link--ai.active {
    color: var(--color-text, #fff);
    background: linear-gradient(90deg, rgba(189, 252, 0, 0.15) 0%, rgba(189, 252, 0, 0.1) 100%);
    border-color: rgba(189, 252, 0, 0.4);
    box-shadow: 0 0 20px rgba(189, 252, 0, 0.1);
}

.p-nav-link--calc {
    color: var(--color-bg, #0e0e0e);
    background: var(--color-accent, #bdfc00);
    font-weight: 600;
}

.p-nav-link--calc:hover,
.p-nav-link--calc.active-link,
.p-nav-link--calc.active {
    color: var(--color-bg, #0e0e0e);
    background: #c5ff1a;
    transform: translateY(-1px);
}

.p-nav-calc-icon {
    font-size: 1rem;
    line-height: 1;
}

.p-nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    width: 40px;
    height: 40px;
    position: relative;
    z-index: 1001;
    color: var(--color-text, #fff);
}

@media (max-width: 1024px) {
    .premium-header {
        padding: 10px;
    }

    .premium-header.scroll-header {
        padding: 5px 10px;
    }

    .p-nav-container {
        padding: 10px 16px;
        border-radius: 20px;
    }

    .p-nav-toggle {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 6px;
    }

    .p-nav-toggle span {
        display: block;
        width: 24px;
        height: 2px;
        background-color: currentColor;
        transition: transform 0.3s ease, opacity 0.3s ease;
        border-radius: 2px;
    }

    .p-nav-toggle.is-active span:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .p-nav-toggle.is-active span:nth-child(2) {
        opacity: 0;
    }

    .p-nav-toggle.is-active span:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .p-nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 100%;
        max-width: 320px;
        height: 100vh;
        height: 100dvh;
        background: rgba(15, 15, 15, 0.98);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        flex-direction: column;
        align-items: flex-start;
        justify-content: center;
        padding: 80px 30px;
        gap: 15px;
        transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        border-left: 1px solid rgba(255, 255, 255, 0.05);
    }

    .p-nav-menu.nav--open {
        right: 0;
    }

    .p-nav-link {
        width: 100%;
        padding: 15px 20px;
        font-size: 1.1rem;
        background: rgba(255, 255, 255, 0.02);
    }

    .p-nav-link:hover {
        background: rgba(255, 255, 255, 0.05);
    }

    .p-nav-link--calc {
        justify-content: center;
        margin-top: 20px;
        background: var(--color-accent, #bdfc00);
        color: var(--color-bg, #0e0e0e);
    }
    
    .p-nav-link--calc:hover {
        background: #c5ff1a;
    }
}