header {
    background: #1976d2;
    color: white;
    padding: 16px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.menu-icon {
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    transition: all 0.2s;
}

.menu-icon:hover {
    background: rgba(255, 255, 255, 0.1);
}

.menu-icon:active {
    transform: scale(0.95);
}

.menu-icon svg {
    color: white;
}

header h1 {
    font-size: 24px;
    font-weight: 700;
    flex: 1;
}

.header-icons {
    display: flex;
    gap: 16px;
}

.header-icons .icon {
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 8px;
}

.header-icons .icon:hover {
    background: rgba(255, 255, 255, 0.1);
}

.header-icons .icon:active {
    transform: scale(0.95);
}

.header-icons .icon svg {
    color: white;
}

.notification-icon.active {
    background: rgba(255, 255, 255, 0.2);
}

.notification-icon.active::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    animation: ping 0.6s ease-out;
    pointer-events: none;
}

.notification-icon .ripple {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.6);
    transform: translate(-50%, -50%) scale(0);
    animation: ripple 0.6s ease-out;
    pointer-events: none;
}

@keyframes ripple {
    0% {
        transform: translate(-50%, -50%) scale(0);
        opacity: 1;
    }
    100% {
        transform: translate(-50%, -50%) scale(2.5);
        opacity: 0;
    }
}

@keyframes ping {
    0% {
        transform: translate(-50%, -50%) scale(0.5);
        opacity: 1;
    }
    100% {
        transform: translate(-50%, -50%) scale(1.5);
        opacity: 0;
    }
}

/* Notification Panel */
.notification-panel {
    position: fixed;
    top: 56px;
    left: 0;
    right: 0;
    background: white;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
    transform: translateY(-100%);
    transition: transform 0.3s ease;
    z-index: 99;
}

.notification-panel.active {
    transform: translateY(0);
}

.notification-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid #e0e0e0;
    position: sticky;
    top: 0;
    background: white;
    z-index: 1;
}

.notification-header h3 {
    font-size: 18px;
    font-weight: 600;
    color: #333;
}

.close-notification {
    background: none;
    border: none;
    color: #999;
    cursor: pointer;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    transition: all 0.2s;
}

.close-notification:hover {
    background: #f5f5f5;
    color: #666;
}

.close-notification:active {
    transform: scale(0.9);
}

.close-notification svg {
    stroke-width: 2.5;
}

.notification-list {
    padding: 8px 0;
}

.notification-item {
    display: flex;
    gap: 12px;
    padding: 16px 20px;
    border-bottom: 1px solid #f5f5f5;
    transition: background 0.2s;
    cursor: pointer;
}

.notification-item:hover {
    background: #f9f9f9;
}

.notification-item:active {
    background: #f0f0f0;
}

.notification-item.unread {
    background: rgba(25, 118, 210, 0.05);
    position: relative;
}

.notification-item.unread::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: #1976d2;
}

.notification-icon-bubble {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.notification-icon-bubble svg {
    color: #1976d2;
}

.notification-content {
    flex: 1;
    min-width: 0;
}

.notification-title {
    font-size: 14px;
    font-weight: 600;
    color: #333;
    margin-bottom: 4px;
}

.notification-text {
    font-size: 13px;
    color: #666;
    margin-bottom: 6px;
    line-height: 1.4;
}

.notification-time {
    font-size: 12px;
    color: #999;
}