* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', sans-serif;
    background: #0a0a1a;
    color: #e0e0f0;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.container {
    width: 960px;
    height: 90vh;
    background: #12122a;
    border-radius: 16px;
    border: 1px solid #2a2a5a;
    display: flex;
    overflow: hidden;
    box-shadow: 0 0 40px rgba(100, 100, 255, 0.1);
}

.sidebar {
    width: 220px;
    background: #1a1a3a;
    border-right: 1px solid #2a2a5a;
    display: flex;
    flex-direction: column;
    padding: 24px 0;
}

.sidebar-header {
    padding: 0 20px 24px;
    border-bottom: 1px solid #2a2a5a;
}

.logo {
    font-size: 18px;
    font-weight: 600;
    color: #a0a0ff;
}

.subtitle {
    font-size: 12px;
    color: #6060aa;
    margin-top: 4px;
}

.nav-menu {
    flex: 1;
    padding: 16px 12px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-radius: 8px;
    color: #8080aa;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 14px;
}

.nav-item:hover {
    background: rgba(100, 100, 255, 0.1);
    color: #c0c0ff;
}

.nav-item.active {
    background: rgba(100, 100, 255, 0.15);
    color: #a0a0ff;
}

.nav-icon {
    font-size: 16px;
}

.sidebar-footer {
    padding: 16px 20px;
    border-top: 1px solid #2a2a5a;
}

.back-link {
    color: #6060aa;
    text-decoration: none;
    font-size: 13px;
}

.back-link:hover {
    color: #a0a0ff;
}

.main-content {
    flex: 1;
    padding: 32px;
    overflow-y: auto;
}

.search-bar {
    display: flex;
    align-items: center;
    background: #0a0a1a;
    border: 1px solid #2a2a5a;
    border-radius: 10px;
    padding: 12px 16px;
    margin-bottom: 28px;
    transition: border-color 0.2s;
}

.search-bar:focus-within {
    border-color: #6060ff;
}

.search-icon {
    font-size: 16px;
    margin-right: 12px;
}

.search-bar input {
    flex: 1;
    background: transparent;
    border: none;
    color: #e0e0f0;
    font-size: 14px;
    outline: none;
    font-family: inherit;
}

.search-bar input::placeholder {
    color: #4040aa;
}

.faq-item {
    margin-bottom: 8px;
    border: 1px solid #2a2a5a;
    border-radius: 10px;
    overflow: hidden;
    transition: border-color 0.2s;
}

.faq-item:hover {
    border-color: #4040aa;
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    color: #c0c0e0;
    transition: background 0.2s;
}

.faq-question:hover {
    background: rgba(100, 100, 255, 0.05);
}

.faq-arrow {
    font-size: 10px;
    color: #6060aa;
    transition: transform 0.3s;
}

.faq-item.open .faq-arrow {
    transform: rotate(90deg);
}

.faq-answer {
    padding: 0 20px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s, padding 0.3s;
    font-size: 13px;
    color: #8080aa;
    line-height: 1.8;
}

.faq-item.open .faq-answer {
    padding: 0 20px 16px;
    max-height: 200px;
}

.no-results {
    text-align: center;
    padding: 40px;
    color: #4040aa;
    font-size: 14px;
}

.feedback-section {
    margin-top: 40px;
    padding-top: 32px;
    border-top: 1px solid #2a2a5a;
}

.feedback-section h3 {
    font-size: 18px;
    color: #e0e0ff;
    margin-bottom: 8px;
}

.feedback-desc {
    font-size: 13px;
    color: #6060aa;
    margin-bottom: 24px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 13px;
    color: #8080aa;
    margin-bottom: 8px;
    font-weight: 500;
}

select, textarea {
    width: 100%;
    max-width: 500px;
    background: #0a0a1a;
    border: 1px solid #2a2a5a;
    border-radius: 8px;
    color: #e0e0f0;
    padding: 10px 14px;
    font-size: 14px;
    font-family: inherit;
    outline: none;
    transition: border-color 0.2s;
}

select:focus, textarea:focus {
    border-color: #6060ff;
}

select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236060aa' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 32px;
}

.btn-submit {
    background: #4040cc;
    color: white;
    border: none;
    padding: 10px 32px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-family: inherit;
    transition: background 0.2s;
}

.btn-submit:hover {
    background: #5050dd;
}

.submit-toast {
    position: fixed;
    top: 24px;
    right: 24px;
    background: #2a5a2a;
    color: #60ff80;
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 14px;
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
}

.submit-toast.show {
    opacity: 1;
}