:root {
    --glass-surface: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-highlight: rgba(255, 255, 255, 0.2);
    --lamp-yellow: #ffdb70;
    --rain-blue: #1a2639;
    --night-bg: #020408;
}

.ios-logo {
    transition: opacity 0.3s ease;
}

.ios-liquid-glass-nav {
    position: relative;
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 5px 6px;
    background: rgba(255, 255, 255, 0.03);
    backdrop-filter: blur(12px) saturate(110%);
    -webkit-backdrop-filter: blur(12px) saturate(110%);
    border-radius: 100px;
    border: 1px solid var(--glass-border);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.2), inset 0 0 20px rgba(0, 0, 0, 0.5);
    transition: all 0.4s ease;
}

.liquid-indicator {
    position: absolute;
    height: calc(100% - 10px);
    top: 5px;
    border-radius: 50px;
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.15);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    transition: left 0.5s cubic-bezier(0.2, 0.8, 0.2, 1), width 0.5s cubic-bezier(0.2, 0.8, 0.2, 1);
    pointer-events: none;
    z-index: 0;
}

.ios-nav-item {
    position: relative;
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 400;
    letter-spacing: 0.02em;
    color: rgba(255, 255, 255, 0.5);
    text-decoration: none;
    border-radius: 50px;
    transition: color 0.3s ease;
    z-index: 1;
}

.ios-nav-item:hover {
    color: rgba(255, 255, 255, 0.8);
}

.ios-nav-item.active {
    color: #ffffff;
    font-weight: 500;
}

.ios-glass-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 12px;
    border: 1px solid var(--glass-border);
    color: rgba(255, 255, 255, 0.8);
    transition: all 0.3s ease;
    cursor: pointer;
}

.ios-glass-btn:hover {
    background: rgba(255, 255, 255, 0.1);
}

.ios-mobile-glass-menu {
    padding: 10px;
    background: rgba(10, 15, 25, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 16px;
    border: 1px solid var(--glass-border);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}

.ios-mobile-nav-item {
    display: block;
    padding: 12px 16px;
    margin: 4px 0;
    font-size: 15px;
    font-weight: 400;
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.2s ease;
}

.ios-mobile-nav-item.active,
.ios-mobile-nav-item:hover {
    background: rgba(255, 255, 255, 0.05);
    color: white;
}

.ios-glass-card {
    background: rgba(255, 255, 255, 0.02);
    backdrop-filter: blur(16px) saturate(100%);
    -webkit-backdrop-filter: blur(16px) saturate(100%);
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    transition: all 0.4s ease;
}

.ios-glass-card:hover {
    border-color: rgba(255, 255, 255, 0.15);
    box-shadow: 0 12px 48px rgba(0, 0, 0, 0.4);
    transform: translateY(-2px);
}

section {
    transition: opacity 0.8s ease, transform 0.8s ease;
}

section.in-view {
    opacity: 1;
    transform: translateY(0);
}

section:not(.in-view) {
    opacity: 0.3;
    transform: translateY(20px);
}