/**
 * 货币转换器 - 页面样式
 * Currency Converter - Page Styles
 */

/* 页面主体 */
body {
    min-height: 100vh;
    background: var(--color-bg-gradient);
    text-align: center;
    padding: var(--spacing-2xl) var(--spacing-xl);
    padding-top: 80px;
}

h1 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-xl);
}

h2 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--color-text-primary);
    margin: var(--spacing-2xl) 0 var(--spacing-lg);
}

/* 货币卡片容器 */
#currency-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-md);
    max-width: 1200px;
    margin: 0 auto;
}

/* 货币卡片 */
.currency-card {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-fast);
    width: 280px;
    touch-action: pan-y;
    position: relative;
}

[data-theme="dark"] .currency-card {
    background: rgba(45, 45, 47, 0.85);
    border-color: rgba(255, 255, 255, 0.1);
}

.currency-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

/* 拖拽样式 */
.currency-card.dragging {
    opacity: 0.5;
}

.currency-card.touch-dragging {
    opacity: 0.85;
    transform: scale(0.98);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

.currency-card.drag-over {
    border: 2px dashed var(--color-primary);
}

/* 标签和输入框 */
label {
    font-size: var(--font-size-md);
    font-weight: 600;
    display: block;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
}

input[type="number"] {
    width: 80%;
    margin: 0 auto;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-lg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    text-align: right;
    transition: all var(--transition-fast);
    background: var(--color-bg-primary);
    color: var(--color-text-primary);
}

input[type="number"]:focus {
    border-color: var(--color-primary);
    outline: none;
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.2);
}

/* 历史汇率查询部分 */
#historical-rate-container {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-lg);
    width: calc(1200px - 80px);
    max-width: calc(100% - 40px);
    margin: var(--spacing-2xl) auto;
    box-sizing: border-box;
}

[data-theme="dark"] #historical-rate-container {
    background: rgba(45, 45, 47, 0.85);
    border-color: rgba(255, 255, 255, 0.1);
}

#historical-rate-container label {
    font-size: var(--font-size-sm);
    display: block;
    margin: var(--spacing-md) 0 var(--spacing-xs);
    text-align: left;
    color: var(--color-text-secondary);
}

#historical-rate-container select,
#historical-rate-container input[type="date"] {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    background: var(--color-bg-primary);
    color: var(--color-text-primary);
}

#historical-rate-container select:focus,
#historical-rate-container input[type="date"]:focus {
    border-color: var(--color-primary);
    outline: none;
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.2);
}

/* 获取历史汇率按钮 */
#get-historical-rate {
    padding: var(--spacing-sm) var(--spacing-xl);
    font-size: var(--font-size-md);
    font-weight: 600;
    margin-top: var(--spacing-md);
    background: var(--color-primary);
    color: white;
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: none;
}

#get-historical-rate:hover {
    background: var(--color-primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

#get-historical-rate.show {
    display: inline-block;
}

#get-historical-rate.loading-btn {
    opacity: 0.85;
    cursor: wait;
    transform: none;
    box-shadow: none;
}

#get-historical-rate:disabled {
    cursor: not-allowed;
}

#historical-query-status {
    min-height: 22px;
    margin-top: 6px;
    margin-bottom: 6px;
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    text-align: left;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

#historical-query-status.show {
    opacity: 1;
}

#historical-query-status.info {
    color: var(--color-text-secondary);
}

#historical-query-status.warn {
    color: #ff9f0a;
}

#historical-query-status.error {
    color: #ff453a;
}

#historical-query-status.success {
    color: #30d158;
}

/* 时间范围选项 */
#date-range-options {
    margin: var(--spacing-lg) 0;
    text-align: left;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--spacing-sm);
}

#date-range-options label {
    margin-right: var(--spacing-sm);
    font-size: var(--font-size-md);
    font-weight: 600;
    color: var(--color-text-primary);
}

.range-button {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    background: var(--color-bg-secondary);
    color: var(--color-text-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.range-button:hover {
    background: var(--color-bg-tertiary);
}

.range-button.active {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

/* 货币选择器容器 */
.currency-selectors-container {
    display: flex;
    justify-content: space-between;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    align-items: center;
}

/* 交换按钮 */
.swap-button {
    background: var(--color-primary);
    color: white;
    border: none;
    border-radius: var(--radius-full);
    width: 44px;
    height: 44px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.swap-button:hover {
    background: var(--color-primary-hover);
    transform: scale(1.1);
}

.swap-icon {
    font-size: 20px;
    transform: rotate(90deg) scaleX(-1);
}

/* 自定义下拉按钮 */
.currency-select-container {
    flex: 1;
    max-width: calc(50% - 30px);
    position: relative;
}

.currency-select-container .hover-label {
    position: absolute;
    top: -25px;
    left: 0;
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    opacity: 0;
    transition: opacity var(--transition-fast);
    pointer-events: none;
}

.currency-select-container:hover .hover-label {
    opacity: 1;
}

.currency-select-button {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-md);
    background: var(--color-bg-primary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    text-align: left;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all var(--transition-fast);
    color: var(--color-text-primary);
}

.currency-select-button:hover {
    border-color: var(--color-primary);
}

.currency-select-button:after {
    content: '▼';
    font-size: 0.8em;
    color: var(--color-text-tertiary);
}

.currency-select-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg-primary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    max-height: 200px;
    overflow-y: auto;
    z-index: 1000;
    display: none;
    box-shadow: var(--shadow-lg);
}

.currency-select-dropdown.show {
    display: block;
}

.currency-option {
    padding: var(--spacing-sm) var(--spacing-md);
    cursor: pointer;
    transition: background var(--transition-fast);
    color: var(--color-text-primary);
}

.currency-option:hover {
    background: var(--color-bg-secondary);
}

#historical-rate-container select {
    display: none;
}

/* 加载状态 */
.loading {
    position: relative;
    opacity: 0.7;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 24px;
    height: 24px;
    margin: -12px 0 0 -12px;
    border: 2px solid var(--color-primary);
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.error-message {
    color: var(--color-danger);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-xs);
}

#rate-update-time {
    margin-top: var(--spacing-md);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

#data-source {
    margin-top: var(--spacing-lg);
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
}

/* 时间显示 */
.currency-card span[id^="time-"] {
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
    display: block;
    margin-bottom: var(--spacing-sm);
}

#historical-action-row {
    margin: 0 0 var(--spacing-md);
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
    justify-content: flex-start;
}

#historical-action-row .range-button[data-range="custom"] {
    flex-shrink: 0;
}

.date-input-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    align-items: end;
}

.date-field {
    min-width: 0;
}

.date-field label {
    margin-top: 0;
}

#historical-rate-result {
    min-height: 320px;
}

/* ============================================================
   移动端响应式样式
   ============================================================ */

@media (max-width: 768px) {
    body {
        padding: var(--spacing-lg) var(--spacing-md);
        padding-top: 100px;
        /* 为顶部控件留出空间 */
    }

    h1 {
        font-size: var(--font-size-xl);
    }

    h2 {
        font-size: var(--font-size-lg);
    }

    #currency-container {
        display: grid;
        grid-template-columns: 1fr;
        justify-content: stretch;
        gap: 12px;
        max-width: 420px;
        width: 100%;
    }

    .currency-card {
        width: 100%;
        max-width: none;
        text-align: left;
        padding: 14px;
        border-radius: 16px;
        display: grid;
        grid-template-columns: 34px minmax(0, 1fr) auto;
        column-gap: 8px;
        row-gap: 8px;
        align-items: center;
    }

    .currency-card:hover {
        transform: none;
    }

    .currency-card::before {
        content: none;
    }

    .currency-card img {
        grid-column: 1;
        grid-row: 1;
        width: 34px !important;
        height: 24px !important;
        margin: 0 !important;
        align-self: center;
    }

    .currency-card label {
        grid-column: 2;
        grid-row: 1;
        font-size: 14px;
        padding-right: 0;
        margin: 0;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .currency-card span[id^="time-"] {
        grid-column: 3;
        grid-row: 1;
        margin: 0;
        font-size: 11px;
        line-height: 1.2;
        white-space: nowrap;
        text-align: right;
    }

    .currency-card input[type="number"] {
        grid-column: 1 / -1;
        grid-row: 2;
        width: 100%;
        margin: 0;
        font-size: 16px;
    }

    #historical-rate-container {
        width: 100%;
        max-width: 100%;
        margin: var(--spacing-xl) auto;
        padding: 16px;
        border-radius: 18px;
    }

    .currency-selectors-container {
        display: grid;
        grid-template-columns: minmax(0, 1fr) 44px minmax(0, 1fr);
        gap: 8px;
        align-items: end;
    }

    .currency-select-container {
        max-width: 100%;
        width: 100%;
    }

    .swap-button {
        transform: none;
        width: 44px;
        height: 44px;
        border-radius: 12px;
        align-self: end;
    }

    .swap-icon {
        transform: none;
    }

    .currency-select-container .hover-label {
        opacity: 1;
        position: static;
        margin-bottom: 6px;
        display: block;
    }

    .currency-select-button {
        min-height: 44px;
    }

    #date-range-options {
        display: flex;
        flex-wrap: wrap;
        gap: 6px;
        align-items: center;
    }

    #date-range-options label {
        flex: 0 0 100%;
        margin: 0 0 4px;
    }

    .range-button {
        width: auto;
        min-height: 34px;
        padding: 6px 10px;
        font-size: 12px;
        border-radius: 12px;
    }

    #historical-action-row {
        display: flex;
        flex-wrap: wrap;
        justify-content: flex-start;
        align-items: center;
        gap: 8px;
        margin-bottom: 10px;
    }

    #historical-action-row .range-button[data-range="custom"] {
        width: auto;
        min-width: 74px;
        min-height: 34px;
        padding: 6px 10px;
        font-size: 12px;
    }

    #historical-action-row:not(.custom-mode) .range-button[data-range="custom"] {
        width: auto;
    }

    #get-historical-rate {
        width: auto;
        min-width: 110px;
        margin-top: 0;
        min-height: 34px;
        padding: 6px 10px;
        font-size: 12px;
        border-radius: 12px;
    }

    .date-input-row {
        width: 100%;
        grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
        gap: 8px;
        justify-content: stretch;
        overflow: hidden;
    }

    .date-field {
        min-width: 0;
        display: flex;
        flex-direction: column;
    }

    .date-field:first-child {
        align-items: flex-start;
    }

    .date-field:last-child {
        align-items: flex-end;
        text-align: right;
    }

    .date-field label {
        font-size: 12px;
        margin: 0 0 4px;
    }

    .date-field input[type="date"] {
        width: 9.8rem !important;
        max-width: calc(50vw - 40px) !important;
        min-width: 0 !important;
        min-height: 34px;
        padding: 6px 4px;
        font-size: 12px;
        justify-self: auto;
        box-sizing: border-box;
        flex: 0 0 auto;
    }

    #historical-rate-result {
        min-height: 260px;
    }

    #rateChart {
        max-height: 260px;
    }
}

@media (max-width: 480px) {
    body {
        padding-top: 90px;
    }

    h1 {
        font-size: var(--font-size-lg);
    }

    #currency-container {
        max-width: 100%;
        gap: 10px;
    }

    .currency-card {
        padding: 12px;
        grid-template-columns: 30px minmax(0, 1fr) auto;
        column-gap: 6px;
        row-gap: 6px;
    }

    .currency-card img {
        width: 30px !important;
        height: 20px !important;
    }

    .currency-card label {
        font-size: 13px;
    }

    .currency-card span[id^="time-"] {
        font-size: 10px;
    }

    #historical-rate-container {
        padding: 12px;
    }

    #date-range-options {
        grid-template-columns: 1fr;
    }

    #historical-action-row {
        display: flex;
        flex-wrap: wrap;
    }

    #historical-action-row:not(.custom-mode) .range-button[data-range="custom"] {
        width: auto;
    }

    .date-input-row {
        width: 100%;
        grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
        gap: 6px;
        justify-content: stretch;
        overflow: hidden;
    }

    .date-field input[type="date"] {
        width: 8.9rem !important;
        max-width: calc(50vw - 34px) !important;
        min-width: 0 !important;
        font-size: 11px;
        padding: 6px 4px;
        justify-self: auto;
        box-sizing: border-box;
        flex: 0 0 auto;
    }

    .language-toggle-label {
        width: 100%;
        justify-content: center;
    }
}

.language-toggle-row {
    max-width: 1200px;
    margin: 0 auto 12px;
    display: flex;
    justify-content: center;
}

.language-toggle-label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.85);
    border: 1px solid rgba(255, 255, 255, 0.3);
    box-shadow: var(--shadow-sm);
    color: var(--color-text-primary);
    cursor: pointer;
    user-select: none;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

[data-theme="dark"] .language-toggle-label {
    background: rgba(45, 45, 47, 0.85);
    border-color: rgba(255, 255, 255, 0.1);
}

.language-toggle-label input[type="checkbox"] {
    width: 16px;
    height: 16px;
}