/* Header, Navigation, and Brand Styles */

header {
    background: rgba(255, 255, 255, 0.98);
    border-bottom: 1px solid var(--gray-light);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: background var(--transition-normal), box-shadow var(--transition-normal);
}

header.scrolled {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 72px;
}

.nav-container.stacked {
    flex-direction: column;
    height: auto;
    padding: var(--space-md) var(--space-lg);
    gap: var(--space-sm);
}

/* Brand */
.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.brand-mark {
    height: 40px;
    width: auto;
}

.brand-text {
    font-weight: 700;
    font-size: 1.5rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Nav Row Layout */
.nav-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    width: 100%;
}

/* Nav Menu */
.nav-menu {
    display: flex;
    list-style: none;
    gap: 8px;
    align-items: center;
}

.nav-menu a {
    color: var(--gray);
    font-weight: 500;
    font-size: 0.95rem;
    padding: 10px 14px;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.nav-menu a:hover {
    color: var(--primary-color);
    background: var(--primary-light);
}

.nav-menu a i {
    font-size: 1.1rem;
}

/* Nav Auth */
.nav-auth {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* Account Menu */
.account-menu {
    position: relative;
}

.account-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 16px;
    background: var(--white);
    border: 1px solid var(--gray-light);
    border-radius: 100px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--dark);
    transition: all var(--transition-fast);
}

.account-btn:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.account-btn .avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--primary-gradient);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: 600;
}

.account-dropdown {
    position: absolute;
    right: 0;
    top: calc(100% + 8px);
    min-width: 220px;
    background: var(--white);
    border: 1px solid var(--gray-light);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    padding: 8px;
    display: none;
    z-index: 2000;
}

.account-dropdown.show {
    display: block;
}

.account-dropdown .account-item {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    padding: 12px 14px;
    border: none;
    background: transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    color: var(--dark);
    font-size: 0.9rem;
    text-align: left;
    transition: background var(--transition-fast);
}

.account-dropdown .account-item:hover {
    background: var(--gray-lighter);
}

.account-dropdown .account-item.danger {
    color: var(--error-color);
}

.account-dropdown .account-item i {
    width: 18px;
    color: var(--gray);
}

.account-dropdown .account-item.danger i {
    color: var(--error-color);
}

@media (min-width: 1024px) {
    .menu-toggle {
        display: none !important;
    }
}

@media (max-width: 768px) {
    .nav-container {
        padding: 0 var(--space-md);
    }

    .brand {
        --brand-size: clamp(1.5rem, 4.5vw, 2rem);
    }

    .nav-menu {
        gap: var(--space-lg);
    }
}