/* ============================================
   彩票概率计算器 v1.0
   版权所有 © 圣手软件
   授权使用网站：yoursite.com
   未经授权禁止复制、修改、分发或用于商业用途
   ============================================ */

/* 容器主样式 - 以 calc-widget 为命名空间 */
.calc-widget {
    max-width: 500px;
    width: 100%;
    margin: 24px auto;
    background: #1f2e42;
    border-radius: 48px;
    padding: 24px 20px 28px;
    box-shadow: 0 25px 50px -8px rgba(0,0,0,0.6), inset 0 2px 4px rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.15);
    font-family: 'Segoe UI', 'Helvetica Neue', Roboto, sans-serif;
    box-sizing: border-box;
    position: relative;
}

.calc-widget * {
    box-sizing: border-box;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

/* 防盗版水印 - 不可见但存在于代码中，用于追溯 */
.calc-widget::after {
    content: "© 圣手软件 | 授权: yoursite.com";
    display: none;
}

/* 头部区域 */
.calc-header {
    text-align: center;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid rgba(255,255,255,0.15);
}

.calc-header h3 {
    color: #ffd966;
    margin-bottom: 6px;
    font-size: 1.2rem;
    font-weight: 600;
    letter-spacing: 1px;
}

.calc-desc {
    color: #b8d0f0;
    font-size: 0.75rem;
    margin: 0;
    line-height: 1.4;
}

/* 显示区域 */
.calc-display {
    background: #253c58;
    border-radius: 32px;
    padding: 18px 20px;
    margin-bottom: 22px;
    box-shadow: inset 0 6px 12px #0f1a28, inset 0 -2px 4px #3c5a7c;
    border: 1px solid #3d5e82;
}

.calc-expression {
    font-size: 1rem;
    color: #a5c1e0;
    min-height: 26px;
    text-align: right;
    word-break: break-all;
    letter-spacing: 0.5px;
    margin-bottom: 6px;
    font-weight: 400;
}

.calc-result {
    font-size: 3rem;
    font-weight: 700;
    color: #ffffff;
    text-align: right;
    word-break: break-all;
    line-height: 1.2;
    text-shadow: 0 2px 5px rgba(0,0,0,0.3);
}

/* 按钮网格 */
.calc-buttons {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin-bottom: 20px;
}

/* 按钮通用样式 */
.calc-btn {
    background: #2b405b;
    border: none;
    border-radius: 28px;
    padding: 16px 0;
    font-size: 1.6rem;
    font-weight: 600;
    color: #eaf0fc;
    box-shadow: 0 6px 0 #14212e;
    cursor: pointer;
    transition: all 0.06s linear;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid #4f74a0;
    line-height: 1;
    font-family: inherit;
}

.calc-btn:active {
    transform: translateY(4px);
    box-shadow: 0 2px 0 #14212e;
}

/* 功能按钮 */
.calc-btn.function {
    background: #3c5a7e;
    color: #ffd966;
    font-size: 1.5rem;
    border-color: #6d93c0;
}

/* 运算符按钮 */
.calc-btn.operator {
    background: #f39c12;
    color: #1e2e41;
    font-size: 1.8rem;
    font-weight: 700;
    border-color: #ffb347;
    box-shadow: 0 6px 0 #b36f0a;
}

.calc-btn.operator:active {
    transform: translateY(4px);
    box-shadow: 0 2px 0 #b36f0a;
}

/* 等号按钮 */
.calc-btn.equals {
    background: #f39c12;
    color: #1e2e41;
    grid-column: span 2;
    font-size: 1.8rem;
    border-color: #ffb347;
}

/* 0 按钮 */
.calc-btn.zero {
    grid-column: span 2;
}

/* 页脚区域 */
.calc-footer {
    text-align: center;
    padding-top: 12px;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.calc-note {
    font-size: 0.65rem;
    color: #8aa9c9;
    margin: 0;
    line-height: 1.4;
}

.calc-warning {
    font-size: 0.6rem;
    color: #c97e5a;
    margin: 8px 0 0 0;
}

/* 可见水印 - 防止盗用 */
.calc-watermark {
    font-size: 0.55rem;
    color: #5a7a9a;
    text-align: center;
    margin-top: 12px;
    padding-top: 8px;
    border-top: 1px solid rgba(255,255,255,0.08);
}

.calc-watermark a {
    color: #6d8eb0;
    text-decoration: none;
}

.calc-watermark a:hover {
    text-decoration: underline;
}

/* 未授权提示样式 */
.calc-unauthorized {
    padding: 30px 20px;
    text-align: center;
    background: #2d2d2d;
    border-radius: 24px;
    color: #ff6b6b;
    font-size: 14px;
}

.calc-unauthorized small {
    display: block;
    margin-top: 10px;
    color: #888;
    font-size: 12px;
}

/* ============================================
   响应式适配 - 移动端优化（修正长宽比问题）
   ============================================ */

/* 手机端适配 (屏幕宽度 ≤ 640px) */
@media (max-width: 1250px) {
    .calc-widget {
        width: 81vw !important;      /* 强制占满视口宽度 */
        max-width: 81vw !important;  /* 强制最大宽度为视口宽度 */                  /* 宽度为屏幕的90%，左右留白 */
        
   

        margin: 20px auto;
        padding: 20px 16px 24px;
        border-radius: 40px;           /* 保持大圆角，更像卡片 */
    }
    
    .calc-header {
        margin-bottom: 16px;
        padding-bottom: 10px;
    }
    
    .calc-header h3 {
        font-size: 1.05rem;
    }
    
    .calc-desc {
        font-size: 0.68rem;
    }
    
    .calc-display {
        padding: 14px 16px;
        margin-bottom: 18px;
        border-radius: 28px;
    }
    
    .calc-expression {
        font-size: 0.88rem;
        min-height: 22px;
    }
    
    .calc-result {
        font-size: 2.4rem;             /* 结果字体适中 */
    }
    
    .calc-buttons {
        gap: 10px;
        margin-bottom: 16px;
    }
    
    .calc-btn {
        padding: 14px 0;               /* 按钮高度适中 */
        font-size: 1.45rem;
        border-radius: 28px;
    }
    
    .calc-btn.function {
        font-size: 1.35rem;
    }
    
    .calc-btn.operator {
        font-size: 1.65rem;
    }
    
    .calc-btn.equals {
        font-size: 1.65rem;
    }
    
    .calc-footer {
        padding-top: 10px;
    }
    
    .calc-note {
        font-size: 0.58rem;
    }
    
    .calc-warning {
        font-size: 0.52rem;
        margin: 5px 0 0 0;
    }
    
    .calc-watermark {
        font-size: 0.48rem;
        margin-top: 8px;
        padding-top: 6px;
    }
}

/* 中等手机适配 (屏幕宽度 ≤ 480px) - iPhone 6/7/8 等 */
@media (max-width: 480px) {
    .calc-widget {
        max-width: 340px;              /* 最大宽度340px，保持紧凑 */
        width: 92%;
        padding: 18px 14px 22px;
        border-radius: 36px;
    }
    
    .calc-result {
        font-size: 2.2rem;
    }
    
    .calc-expression {
        font-size: 0.82rem;
    }
    
    .calc-buttons {
        gap: 8px;
    }
    
    .calc-btn {
        padding: 12px 0;
        font-size: 1.35rem;
        border-radius: 26px;
    }
    
    .calc-btn.function {
        font-size: 1.25rem;
    }
    
    .calc-btn.operator {
        font-size: 1.55rem;
    }
    
    .calc-btn.equals {
        font-size: 1.55rem;
    }
}

/* 小屏手机适配 (屏幕宽度 ≤ 375px) - iPhone SE 等 */
@media (max-width: 375px) {
    .calc-widget {
        max-width: 320px;              /* 最大宽度320px */
        width: 94%;
        padding: 16px 12px 20px;
        border-radius: 32px;
    }
    
    .calc-result {
        font-size: 2rem;
    }
    
    .calc-btn {
        padding: 10px 0;
        font-size: 1.28rem;
        border-radius: 24px;
    }
    
    .calc-btn.operator {
        font-size: 1.48rem;
    }
    
    .calc-buttons {
        gap: 8px;
    }
}

/* 超小屏手机适配 (屏幕宽度 ≤ 320px) - 极少数设备 */
@media (max-width: 320px) {
    .calc-widget {
        max-width: 300px;
        width: 96%;
        padding: 14px 10px 18px;
        border-radius: 28px;
    }
    
    .calc-result {
        font-size: 1.8rem;
    }
    
    .calc-btn {
        padding: 8px 0;
        font-size: 1.2rem;
        border-radius: 22px;
    }
    
    .calc-btn.operator {
        font-size: 1.4rem;
    }
    
    .calc-buttons {
        gap: 6px;
    }
}

/* 横屏模式适配 - 保持紧凑，避免过长 */
@media (max-width: 800px) and (orientation: landscape) {
    .calc-widget {
        max-width: 420px;              /* 横屏时最大宽度420px */
        width: 85%;
        margin: 12px auto;
        padding: 14px 12px 18px;
        border-radius: 32px;
    }
    
    .calc-header {
        margin-bottom: 10px;
        padding-bottom: 6px;
    }
    
    .calc-header h3 {
        font-size: 0.9rem;
    }
    
    .calc-desc {
        font-size: 0.6rem;
    }
    
    .calc-display {
        padding: 10px 14px;
        margin-bottom: 12px;
        border-radius: 24px;
    }
    
    .calc-result {
        font-size: 1.8rem;
    }
    
    .calc-expression {
        font-size: 0.75rem;
    }
    
    .calc-buttons {
        gap: 6px;
        margin-bottom: 12px;
    }
    
    .calc-btn {
        padding: 8px 0;
        font-size: 1.2rem;
        border-radius: 24px;
    }
    
    .calc-footer {
        padding-top: 6px;
    }
    
    .calc-note {
        font-size: 0.5rem;
    }
    
    .calc-warning {
        font-size: 0.45rem;
    }
}

/* 平板设备适配 (宽度在641px到1024px之间) */
@media (min-width: 641px) and (max-width: 1024px) {
    .calc-widget {
        max-width: 420px;
        width: 100%;
        margin: 30px auto;
    }
    
    .calc-btn {
        padding: 18px 0;
        font-size: 1.7rem;
    }
    
    .calc-result {
        font-size: 3rem;
    }
}