header {
    background: linear-gradient(135deg, var(--header-gradient-start) 0%, var(--header-gradient-end) 100%);
    color: var(--header-text-color);
    padding: 1.5rem 1rem;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-header);
    backdrop-filter: blur(10px);
    transition: background 0.3s ease;
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
}

.header-main {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
}

.header-title {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex: 1;
}

.header-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: var(--header-glass-bg);
    border-radius: 12px;
    backdrop-filter: blur(10px);
    transition: background 0.3s ease;
}

.header-icon svg {
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.header-text h1 {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    margin: 0;
    line-height: 1.2;
}

.header-subtitle {
    font-size: 0.875rem;
    font-weight: 400;
    opacity: 0.9;
    margin: 0.25rem 0 0 0;
    letter-spacing: 0.3px;
}

.header-info {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--header-glass-bg);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 500;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
    white-space: nowrap;
}

.info-item:hover {
    background: var(--header-glass-bg-hover);
    transform: translateY(-1px);
}

.info-item svg {
    flex-shrink: 0;
    opacity: 0.9;
}

@media (max-width: 992px) {
    header {
        padding: 1.25rem 1rem;
    }

    .header-main {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .header-text h1 {
        font-size: 1.5rem;
    }

    .header-info {
        width: 100%;
        flex-wrap: wrap;
        gap: 0.75rem;
    }

    .info-item {
        flex: 1;
        min-width: fit-content;
        padding: 0.5rem 0.75rem;
        font-size: 0.8rem;
    }
}

@media (max-width: 640px) {
    .header-icon {
        width: 40px;
        height: 40px;
    }

    .header-icon svg {
        width: 24px;
        height: 24px;
    }

    .header-text h1 {
        font-size: 1.25rem;
    }

    .header-subtitle {
        font-size: 0.75rem;
    }

    .info-item {
        font-size: 0.75rem;
    }

    .info-item svg {
        width: 12px;
        height: 12px;
    }
}