/* Header styles - Professional Exchange Platform Design */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 0;
    margin-bottom: 24px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 600;
    color: #ffffff;
    letter-spacing: -0.3px;
    text-decoration: none;
}

.logo-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, #4a9eff 0%, #00d4ff 100%);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
    font-size: 18px;
    flex-shrink: 0;
}

.header-actions {
    display: flex;
    gap: 8px;
    align-items: center;
}

.language-selector {
    position: relative;
}

.lang-btn {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.12);
    color: #b8bcc8;
    padding: 8px 12px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 6px;
    white-space: nowrap;
}

.lang-btn:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.2);
    color: #ffffff;
}

.lang-btn span {
    font-size: 10px;
    opacity: 0.6;
    margin-left: 2px;
}

.lang-dropdown {
    position: absolute;
    top: calc(100% + 6px);
    right: 0;
    background: #1a1f3a;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    min-width: 160px;
    display: none;
    z-index: 1000;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    overflow: hidden;
}

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

.lang-option {
    padding: 10px 16px;
    cursor: pointer;
    transition: all 0.15s ease;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    color: #b8bcc8;
    font-size: 13px;
    font-weight: 400;
}

.lang-option:last-child {
    border-bottom: none;
}

.lang-option:hover {
    background: rgba(74, 158, 255, 0.1);
    color: #ffffff;
}

.lang-option.active {
    background: rgba(74, 158, 255, 0.15);
    color: #4a9eff;
    font-weight: 500;
}

.customer-service-btn {
    background: #4a9eff;
    border: none;
    color: #ffffff;
    padding: 8px 16px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.customer-service-btn:hover {
    background: #3a8eef;
}

.customer-service-btn:active {
    background: #2a7edf;
}