/* Mobile Optimization Styles */

/* ===== 面包屑导航修复样式 ===== */

/* 基础面包屑样式 */
.breadcrumb ol {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.breadcrumb li {
    display: flex;
    align-items: center;
    font-size: 14px;
    line-height: 1.2;
}

.breadcrumb li:not(:last-child) {
    margin-right: 0;
}

.breadcrumb li svg {
    flex-shrink: 0;
    width: 16px;
    height: 16px;
    margin: 0 8px;
}

.breadcrumb li a,
.breadcrumb li span {
    display: inline-flex;
    align-items: center;
    text-decoration: none;
    color: inherit;
    line-height: 1.2;
    white-space: nowrap;
}

.breadcrumb li a:hover {
    color: #3b82f6;
}

.breadcrumb li span[aria-current="page"] {
    font-weight: 500;
    color: #1e293b;
}

/* 确保图标和文本完美对齐 */
.breadcrumb li svg {
    vertical-align: middle;
}

.breadcrumb li a,
.breadcrumb li span {
    vertical-align: middle;
}

/* 修复可能的基线对齐问题 */
.breadcrumb li {
    vertical-align: baseline;
}

/* 确保所有元素在同一水平线上 */
.breadcrumb ol,
.breadcrumb li,
.breadcrumb li a,
.breadcrumb li span,
.breadcrumb li svg {
    box-sizing: border-box;
}

/* 防止字体渲染差异导致的对齐问题 */
.breadcrumb li a,
.breadcrumb li span {
    font-family: inherit;
    font-weight: inherit;
    font-style: inherit;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===== 移动端优化样式 ===== */

/* Prevent zoom on input focus for iOS */
@media (max-width: 768px) {
    input[type="number"],
    input[type="text"],
    select,
    textarea {
        font-size: 16px !important;
    }
}

/* Touch-friendly button sizes */
@media (max-width: 768px) {
    button,
    .btn,
    [role="button"] {
        min-height: 44px;
        min-width: 44px;
        padding: 12px 16px;
    }
    
    /* Calculator buttons */
    #calculate-btn {
        min-height: 48px;
        font-size: 18px;
        padding: 14px 24px;
    }
}

/* 移动端面包屑优化 */
@media (max-width: 768px) {
    .breadcrumb ol {
        gap: 6px;
        padding: 8px 0;
    }
    
    .breadcrumb li {
        font-size: 13px;
    }
    
    .breadcrumb li svg {
        width: 14px;
        height: 14px;
        margin: 0 6px;
    }
    
    /* 确保文本和图标垂直居中 */
    .breadcrumb li a,
    .breadcrumb li span {
        min-height: 20px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }
    
    /* 防止文本换行导致的对齐问题 */
    .breadcrumb li {
        flex-shrink: 0;
    }
    
    /* 如果内容过长，允许换行但保持对齐 */
    .breadcrumb ol {
        align-items: flex-start;
    }
    
    .breadcrumb li {
        align-items: flex-start;
    }
}

/* 超小屏幕面包屑优化 */
@media (max-width: 480px) {
    .breadcrumb ol {
        gap: 4px;
    }
    
    .breadcrumb li {
        font-size: 12px;
    }
    
    .breadcrumb li svg {
        width: 12px;
        height: 12px;
        margin: 0 4px;
    }
    
    .breadcrumb li a,
    .breadcrumb li span {
        min-height: 18px;
    }
}

/* Improved mobile navigation */
@media (max-width: 768px) {
    /* Calculator grid optimization */
    .calculator-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    /* Input spacing */
    .input-group {
        margin-bottom: 20px;
    }
    
    /* Results section */
    .results-section {
        margin-top: 24px;
    }
    
    /* Related calculators */
    .related-calculators {
        grid-template-columns: 1fr;
        gap: 12px;
    }
}

/* Enhanced mobile typography */
@media (max-width: 768px) {
    h1 {
        font-size: 2.5rem !important;
        line-height: 1.2 !important;
    }
    
    h2 {
        font-size: 1.875rem !important;
        line-height: 1.3 !important;
    }
    
    h3 {
        font-size: 1.5rem !important;
        line-height: 1.4 !important;
    }
    
    p {
        font-size: 16px !important;
        line-height: 1.6 !important;
    }
}

/* Mobile-friendly spacing */
@media (max-width: 768px) {
    .container {
        padding-left: 16px !important;
        padding-right: 16px !important;
    }
    
    .section-padding {
        padding-top: 32px !important;
        padding-bottom: 32px !important;
    }
    
    .card-padding {
        padding: 16px !important;
    }
}

/* Improved mobile forms */
@media (max-width: 768px) {
    .form-group {
        margin-bottom: 20px;
    }
    
    .form-label {
        font-size: 14px;
        font-weight: 600;
        margin-bottom: 8px;
        display: block;
    }
    
    .form-input {
        width: 100%;
        padding: 12px 16px;
        border: 2px solid #e2e8f0;
        border-radius: 8px;
        font-size: 16px;
        transition: border-color 0.2s;
    }
    
    .form-input:focus {
        outline: none;
        border-color: #3b82f6;
        box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
    }
}

/* Mobile-optimized results display */
@media (max-width: 768px) {
    .results-card {
        padding: 20px;
        margin-top: 20px;
    }
    
    .result-item {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 12px 0;
        border-bottom: 1px solid #f1f5f9;
    }
    
    .result-item:last-child {
        border-bottom: none;
    }
    
    .result-label {
        font-size: 14px;
        color: #64748b;
    }
    
    .result-value {
        font-size: 16px;
        font-weight: 600;
        color: #1e293b;
    }
}

/* Enhanced mobile accessibility */
@media (max-width: 768px) {
    /* Larger touch targets */
    a, button, [role="button"] {
        min-height: 44px;
        min-width: 44px;
    }
    
    /* Better focus indicators */
    *:focus-visible {
        outline: 3px solid #3b82f6;
        outline-offset: 2px;
    }
    
    /* Improved contrast for small text */
    .text-sm {
        font-size: 14px !important;
    }
    
    .text-xs {
        font-size: 12px !important;
    }
}

/* Mobile-specific calculator optimizations */
@media (max-width: 768px) {
    /* Calculator layout */
    .calculator-container {
        grid-template-columns: 1fr !important;
        gap: 24px !important;
    }
    
    /* Input sections */
    .input-section {
        order: 1;
    }
    
    .results-section {
        order: 2;
    }
    
    /* Unit selector */
    .unit-selector {
        display: flex;
        gap: 8px;
        margin-bottom: 20px;
    }
    
    .unit-selector button {
        flex: 1;
        padding: 12px 8px;
        font-size: 14px;
    }
    
    /* Shape selector */
    .shape-selector {
        display: flex;
        gap: 8px;
        margin-bottom: 20px;
    }
    
    .shape-selector button {
        flex: 1;
        padding: 12px 8px;
        font-size: 14px;
    }
}

/* Mobile performance optimizations */
@media (max-width: 768px) {
    /* Reduce animations for better performance */
    * {
        animation-duration: 0.2s !important;
        transition-duration: 0.2s !important;
    }
    
    /* Optimize images */
    img {
        max-width: 100%;
        height: auto;
    }
    
    /* Reduce box shadows for better performance */
    .shadow-md {
        box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06) !important;
    }
    
    .shadow-lg {
        box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05) !important;
    }
}

/* Mobile-specific navigation improvements */
@media (max-width: 768px) {
    /* Header optimization */
    .header {
        padding: 12px 16px;
    }
    
    .mobile-menu {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: 50;
    }
    
    .mobile-menu-content {
        position: fixed;
        top: 0;
        right: 0;
        bottom: 0;
        width: 280px;
        background: white;
        padding: 24px;
        overflow-y: auto;
    }
    
    /* Mobile menu items */
    .mobile-menu-item {
        display: block;
        padding: 16px 0;
        border-bottom: 1px solid #f1f5f9;
        font-size: 16px;
        font-weight: 500;
    }
    
    .mobile-menu-item:last-child {
        border-bottom: none;
    }
}

/* Mobile-specific content improvements */
@media (max-width: 768px) {
    /* Better content hierarchy */
    .content-section {
        margin-bottom: 32px;
    }
    
    /* Improved readability */
    .prose {
        font-size: 16px;
        line-height: 1.7;
    }
    
    .prose h1, .prose h2, .prose h3 {
        margin-top: 32px;
        margin-bottom: 16px;
    }
    
    .prose p {
        margin-bottom: 16px;
    }
    
    .prose ul, .prose ol {
        margin-bottom: 16px;
        padding-left: 24px;
    }
    
    .prose li {
        margin-bottom: 8px;
    }
}

/* Mobile-specific interactive elements */
@media (max-width: 768px) {
    /* Better hover states for touch devices */
    .hover\:bg-brand-primary:hover {
        background-color: #1e40af !important;
    }
    
    .hover\:text-brand-primary:hover {
        color: #1e40af !important;
    }
    
    /* Improved button states */
    .btn:active {
        transform: scale(0.98);
    }
    
    /* Better form feedback */
    .form-input:invalid {
        border-color: #ef4444;
    }
    
    .form-input:valid {
        border-color: #10b981;
    }
}

/* Mobile-specific loading states */
@media (max-width: 768px) {
    .loading {
        display: flex;
        align-items: center;
        justify-content: center;
        padding: 40px 20px;
    }
    
    .loading-spinner {
        width: 32px;
        height: 32px;
        border: 3px solid #f1f5f9;
        border-top: 3px solid #3b82f6;
        border-radius: 50%;
        animation: spin 1s linear infinite;
    }
    
    @keyframes spin {
        0% { transform: rotate(0deg); }
        100% { transform: rotate(360deg); }
    }
}