/* autism_screening_ai_assistant/frontend/css/style.css */
:root {
    --color-primary: #667eea;
    --color-primary-dark: #764ba2;
    --color-secondary: #84fab0;
    --color-secondary-dark: #8fd3f4;
    --border-radius: 12px;
    --transition-speed: 0.2s;
}

/* 基础样式 */
body {
    font-family: 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
    color: #333;
    line-height: 1.5;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    min-height: 100vh;
    -webkit-text-size-adjust: 100%;
}

/* 卡片组件 */
.card {
    background: rgba(255, 255, 255, 0.98);
    border-radius: var(--border-radius);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    transition: all var(--transition-speed) ease;
    padding: 1rem;
    margin-bottom: 1rem;
}

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: none;
    border-radius: var(--border-radius);
    padding: 0.75rem 1.25rem;
    font-weight: 600;
    transition: all var(--transition-speed) ease;
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: white;
}

.btn-secondary {
    background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-secondary-dark) 100%);
    color: white;
}

/* 移动端优化 */
@media (max-width: 640px) {
    :root {
        --border-radius: 10px;
    }

    .card {
        padding: 0.8rem;
        margin-bottom: 0.8rem;
    }

    .btn {
        padding: 0.6rem 1rem;
        font-size: 0.9rem;
    }

    /* 聊天消息优化 */
    .message {
        max-width: 90%;
        padding: 0.6rem;
        font-size: 0.9rem;
    }

    /* 量表选项优化 */
    .option-card {
        padding: 0.6rem;
        margin-bottom: 0.5rem;
    }
}

/* 粒子背景 */
.particles-js {
    position: fixed;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: -1;
}

/* 动画效果 */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(5px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeIn 0.3s ease-out forwards;
}

/* 输入框样式 */
.input-field {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #e5e7eb;
    border-radius: var(--border-radius);
    font-size: 0.95rem;
    transition: border-color var(--transition-speed);
}

.input-field:focus {
    outline: none;
    border-color: var(--color-primary);
}

/* 进度条 */
.progress-bar {
    height: 6px;
    border-radius: 3px;
    background: rgba(0, 0, 0, 0.05);
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    border-radius: 3px;
    transition: width 0.3s ease;
}

/* 风险标签 */
.risk-badge {
    display: inline-block;
    padding: 0.3rem 0.7rem;
    border-radius: 9999px;
    font-weight: 600;
    font-size: 0.85rem;
}

.risk-low {
    background-color: #84fab0;
    color: #065f46;
}

.risk-medium {
    background-color: #fcd34d;
    color: #92400e;
}

.risk-high {
    background-color: #f87171;
    color: #7f1d1d;
}