/* ==========================================
   USDT TRC20 地址管理系统 - 样式表
   Apple 极简风格 | 响应式 | 无 emoji 无蓝紫渐变
   ========================================== */

/* ---------- CSS 变量 ---------- */
:root {
    --color-bg:            #FFFFFF;
    --color-bg-secondary:  #F5F5F7;
    --color-bg-hover:      #FAFAFA;
    --color-border:        #E5E5EA;
    --color-border-light:  #F0F0F0;
    --color-text:          #1D1D1F;
    --color-text-secondary:#86868B;
    --color-text-tertiary: #6E6E73;
    --color-primary:       #1C1C1E;
    --color-primary-hover: #333333;
    --color-success:       #2E7D32;
    --color-success-bg:    #E8F5E9;
    --color-danger:        #C41E3A;
    --color-danger-bg:     #FFEBEE;
    --color-overlay:       rgba(0, 0, 0, 0.3);
    --font-family:         -apple-system, BlinkMacSystemFont, "PingFang SC", "Helvetica Neue", "Microsoft YaHei", sans-serif;
    --font-mono:           "SF Mono", "Menlo", "Monaco", "Consolas", monospace;
    --radius-sm:           6px;
    --radius-md:           10px;
    --radius-lg:           14px;
    --shadow-sm:           0 1px 2px rgba(0,0,0,0.04);
    --shadow-md:           0 2px 8px rgba(0,0,0,0.06);
    --shadow-lg:           0 8px 24px rgba(0,0,0,0.08);
    --transition:          0.2s cubic-bezier(0.25, 0.1, 0.25, 1);
    --max-width:           960px;
}

/* ---------- Reset ---------- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 15px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    color: var(--color-text);
    background: var(--color-bg-secondary);
    line-height: 1.6;
    min-height: 100vh;
}

/* ==========================================
   认证页面
   ========================================== */
body.auth-page {
    background: var(--color-bg);
}

.auth-container {
    max-width: 400px;
    margin: 0 auto;
    padding: 80px 24px 40px;
}

.auth-card {
    text-align: center;
}

.auth-logo {
    font-size: 32px;
    font-weight: 700;
    letter-spacing: -1px;
    color: var(--color-text);
    margin-bottom: 4px;
}

.auth-desc {
    font-size: 14px;
    color: var(--color-text-secondary);
    margin-bottom: 36px;
}

.auth-tabs {
    display: inline-flex;
    background: var(--color-bg-secondary);
    border-radius: var(--radius-sm);
    padding: 3px;
    margin-bottom: 28px;
    gap: 2px;
}

.auth-tab {
    padding: 8px 28px;
    font-family: var(--font-family);
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-tertiary);
    background: transparent;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all var(--transition);
}
.auth-tab:hover {
    color: var(--color-text);
}
.auth-tab.active {
    background: var(--color-bg);
    color: var(--color-text);
    box-shadow: var(--shadow-sm);
}

.auth-form {
    display: none;
    text-align: left;
}
.auth-form.active {
    display: block;
}
.auth-form .form-field {
    margin-bottom: 16px;
}
.auth-form .form-error {
    margin-bottom: 16px;
}

.btn-block {
    width: 100%;
    justify-content: center;
    padding: 11px 18px;
    font-size: 15px;
}

/* ---------- 数学验证码 ---------- */
.captcha-field {
    margin-bottom: 16px;
}

.captcha-row {
    display: flex;
    gap: 8px;
    align-items: center;
}

.captcha-input {
    width: 100px;
    flex-shrink: 0;
    -moz-appearance: textfield;
}
.captcha-input::-webkit-inner-spin-button,
.captcha-input::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.captcha-refresh {
    flex-shrink: 0;
    padding: 10px;
}

/* ---------- 容器 ---------- */
.app-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 40px 24px 80px;
}

/* ---------- 顶部标题栏 ---------- */
.header {
    margin-bottom: 28px;
}

.header-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 8px;
}

.header-actions {
    display: flex;
    gap: 8px;
}

.page-title {
    font-size: 28px;
    font-weight: 600;
    color: var(--color-text);
    letter-spacing: -0.5px;
}

.header-sub {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 13px;
    color: var(--color-text-secondary);
    margin-bottom: 12px;
}

.header-user {
    font-weight: 500;
}

.btn-link {
    background: none;
    border: none;
    font-family: var(--font-family);
    font-size: 13px;
    color: var(--color-text-tertiary);
    cursor: pointer;
    transition: color var(--transition);
}
.btn-link:hover {
    color: var(--color-danger);
}

.header-stats {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--color-text-secondary);
}

.stat-dot {
    color: var(--color-border);
}

/* ---------- 按钮 ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 18px;
    font-family: var(--font-family);
    font-size: 14px;
    font-weight: 500;
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    transition: all var(--transition);
    outline: none;
    white-space: nowrap;
}

.btn-primary {
    background: var(--color-primary);
    color: #FFFFFF;
}
.btn-primary:hover {
    background: var(--color-primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}
.btn-primary:active {
    transform: translateY(0);
    box-shadow: none;
}

.btn-ghost {
    background: transparent;
    color: var(--color-text);
    border: 1px solid var(--color-border);
}
.btn-ghost:hover {
    background: var(--color-bg-hover);
    border-color: #C7C7CC;
}

.btn-danger {
    background: var(--color-danger);
    color: #FFFFFF;
}
.btn-danger:hover {
    background: #A01830;
}

.btn-sm {
    padding: 5px 10px;
    font-size: 12px;
    border-radius: 4px;
}

.btn-icon {
    padding: 6px;
    background: transparent;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    color: var(--color-text-tertiary);
    cursor: pointer;
    transition: all var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
.btn-icon:hover {
    background: var(--color-bg-hover);
    border-color: var(--color-border);
    color: var(--color-text);
}

/* ---------- 筛选栏 ---------- */
.filter-bar {
    margin-bottom: 24px;
}

.filter-group {
    display: inline-flex;
    background: var(--color-bg-secondary);
    border-radius: var(--radius-sm);
    padding: 3px;
    gap: 2px;
}

.filter-btn {
    padding: 7px 16px;
    font-family: var(--font-family);
    font-size: 13px;
    font-weight: 500;
    color: var(--color-text-tertiary);
    background: transparent;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all var(--transition);
}
.filter-btn:hover {
    color: var(--color-text);
}
.filter-btn.active {
    background: var(--color-bg);
    color: var(--color-text);
    box-shadow: var(--shadow-sm);
}

/* ---------- 加载状态 ---------- */
.loading-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 80px 0;
    gap: 16px;
    color: var(--color-text-secondary);
    font-size: 14px;
}

.spinner {
    width: 24px;
    height: 24px;
    border: 2px solid var(--color-border);
    border-top-color: var(--color-text-tertiary);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}

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

/* ---------- 空状态 ---------- */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 80px 0;
    gap: 16px;
}

.empty-icon {
    opacity: 0.6;
}

.empty-text {
    color: var(--color-text-secondary);
    font-size: 15px;
}

/* ---------- 地址卡片 ---------- */
.address-card {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 18px 22px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    margin-bottom: 10px;
    transition: all var(--transition);
    position: relative;
}
.address-card:hover {
    border-color: #D1D1D6;
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

/* 地址信息区 */
.card-info {
    flex: 1;
    min-width: 0;
}

.card-address {
    font-family: var(--font-mono);
    font-size: 14px;
    color: var(--color-text);
    word-break: break-all;
    line-height: 1.4;
    margin-bottom: 2px;
}

.card-label {
    font-size: 12px;
    color: var(--color-text-secondary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* 余额区 */
.card-balances {
    display: flex;
    gap: 24px;
    flex-shrink: 0;
}

.balance-item {
    text-align: right;
    white-space: nowrap;
}

.balance-value {
    font-family: var(--font-mono);
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text);
}

.balance-value.is-zero {
    color: var(--color-text-secondary);
    font-weight: 400;
}

.balance-label {
    font-size: 11px;
    color: var(--color-text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* 状态标签 */
.card-status {
    flex-shrink: 0;
}

.status-used,
.status-unused {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 10px;
    border-radius: 100px;
    font-size: 11px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
    border: none;
    font-family: var(--font-family);
}

.status-used {
    background: var(--color-success-bg);
    color: var(--color-success);
}
.status-used::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--color-success);
}

.status-unused {
    background: var(--color-bg-secondary);
    color: var(--color-text-tertiary);
}
.status-unused::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #C7C7CC;
}

.status-used:hover { opacity: 0.85; }
.status-unused:hover { background: #ECECEE; }

/* 操作按钮组 */
.card-actions {
    display: flex;
    gap: 4px;
    flex-shrink: 0;
    opacity: 0;
    transition: opacity var(--transition);
}
.address-card:hover .card-actions {
    opacity: 1;
}

/* ---------- 弹窗 ---------- */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: var(--color-overlay);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 20px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s ease, visibility 0.25s ease;
}
.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 460px;
    box-shadow: var(--shadow-lg);
    transform: translateY(12px) scale(0.97);
    transition: transform 0.3s cubic-bezier(0.22, 0.61, 0.36, 1);
}
.modal-overlay.active .modal {
    transform: translateY(0) scale(1);
}

.modal-sm {
    max-width: 380px;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 22px 24px 0;
}

.modal-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-text);
}

.modal-close {
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    border: none;
    background: transparent;
    cursor: pointer;
    transition: background var(--transition);
}
.modal-close:hover {
    background: var(--color-bg-secondary);
}

.modal-form {
    padding: 20px 24px 24px;
}

.form-field {
    margin-bottom: 18px;
}

.form-label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: 6px;
}

.form-input {
    width: 100%;
    padding: 10px 14px;
    font-family: var(--font-family);
    font-size: 14px;
    color: var(--color-text);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    outline: none;
    transition: border-color var(--transition), box-shadow var(--transition);
}
.form-input:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(28, 28, 30, 0.08);
}
.form-input::placeholder {
    color: #C7C7CC;
}

.form-hint {
    font-size: 12px;
    color: var(--color-text-tertiary);
    margin-top: 5px;
}

.form-textarea {
    width: 100%;
    padding: 10px 14px;
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--color-text);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    outline: none;
    resize: vertical;
    line-height: 1.6;
    transition: border-color var(--transition), box-shadow var(--transition);
}
.form-textarea:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(28, 28, 30, 0.08);
}
.form-textarea::placeholder {
    color: #C7C7CC;
    font-family: var(--font-family);
    font-size: 13px;
}

.form-actions {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
    margin-top: 6px;
}

.form-error {
    font-size: 13px;
    color: var(--color-danger);
    margin-top: 10px;
    display: none;
}
.form-error.visible {
    display: block;
}

.confirm-text {
    padding: 8px 24px 20px;
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* ---------- Toast ---------- */
.toast {
    position: fixed;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: var(--color-primary);
    color: #FFFFFF;
    padding: 10px 22px;
    border-radius: 100px;
    font-size: 13px;
    font-weight: 500;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 2000;
    pointer-events: none;
}
.toast.show {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}
.toast.error {
    background: var(--color-danger);
}

/* ---------- 批量导入结果 ---------- */
.batch-result {
    margin-bottom: 16px;
    padding: 12px 14px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    line-height: 1.6;
}
.batch-result p {
    margin: 0;
}
.batch-result.pending {
    background: var(--color-bg-secondary);
    color: var(--color-text-secondary);
}
.batch-result.success {
    background: #F5F5F7;
    color: var(--color-text);
}
.batch-result.error {
    background: var(--color-danger-bg);
    color: var(--color-danger);
}

.batch-summary {
    display: flex;
    gap: 14px;
    margin-bottom: 10px;
}

.batch-stat {
    font-weight: 500;
    font-size: 14px;
}
.batch-stat.added   { color: var(--color-success); }
.batch-stat.skipped { color: #E67E22; }
.batch-stat.invalid { color: var(--color-danger); }

.batch-detail-title {
    font-size: 12px;
    color: var(--color-text-secondary);
    margin-top: 8px;
    margin-bottom: 4px;
}

.batch-detail-list {
    list-style: none;
    margin: 0;
    padding: 0;
    max-height: 120px;
    overflow-y: auto;
}
.batch-detail-list li {
    font-size: 12px;
    color: var(--color-text-tertiary);
    padding: 2px 0;
}
.batch-detail-list code {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--color-text);
}

/* ==========================================
   响应式 - 平板 (768px - 1024px)
   ========================================== */
@media (max-width: 1024px) {
    .app-container {
        padding: 32px 20px 60px;
    }

    .card-balances {
        gap: 16px;
    }
}

/* ==========================================
   响应式 - 手机 (< 768px)
   ========================================== */
@media (max-width: 767px) {
    .app-container {
        padding: 24px 14px 60px;
    }

    .auth-container {
        padding: 48px 20px 30px;
    }

    .page-title {
        font-size: 22px;
    }

    /* 官网页 */
    .hero-title {
        font-size: 32px;
        letter-spacing: -1px;
    }
    .hero-desc {
        font-size: 15px;
    }
    .landing-hero {
        padding: 56px 20px 48px;
    }
    .landing-features {
        grid-template-columns: 1fr;
        gap: 12px;
        padding: 0 20px 60px;
    }
    .landing-nav {
        padding: 14px 20px;
    }

    /* 卡片纵向布局 */
    .address-card {
        flex-wrap: wrap;
        gap: 12px;
        padding: 16px;
    }

    .card-info {
        flex: 1 1 100%;
        order: 1;
    }

    .card-balances {
        flex: 1 1 100%;
        order: 2;
        justify-content: space-between;
        gap: 8px;
        padding: 8px 0;
        border-top: 1px solid var(--color-border-light);
    }

    .balance-item {
        text-align: left;
    }

    .card-status {
        order: 3;
    }

    .card-actions {
        order: 3;
        margin-left: auto;
        opacity: 1;
    }

    /* 地址截断 */
    .card-address {
        font-size: 13px;
        max-width: 100%;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    /* 筛选栏横向滚动 */
    .filter-group {
        width: 100%;
        justify-content: center;
    }

    /* 弹窗全屏 */
    .modal-overlay {
        padding: 10px;
        align-items: flex-end;
    }

    .modal {
        max-width: 100%;
        border-radius: var(--radius-lg) var(--radius-lg) 0 0;
        max-height: 90vh;
        overflow-y: auto;
    }

    .modal-sm {
        max-width: 100%;
    }

    .header-stats {
        flex-wrap: wrap;
        font-size: 12px;
    }

    .header-actions .btn span {
        display: none;
    }
    .header-actions .btn {
        padding: 8px 12px;
    }
}

/* ==========================================
   官网介绍页
   ========================================== */
.landing {
    background: var(--color-bg);
    min-height: 100vh;
}
.landing-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 18px 24px;
}
.landing-logo {
    font-size: 20px;
    font-weight: 700;
    letter-spacing: -0.5px;
    color: var(--color-text);
}
.landing-nav-links {
    display: flex;
    gap: 8px;
}
.landing-nav-links a,
.hero-actions a {
    text-decoration: none;
}

.landing-hero {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 80px 24px 64px;
    text-align: center;
}
.hero-title {
    font-size: 48px;
    font-weight: 700;
    letter-spacing: -2px;
    color: var(--color-text);
    line-height: 1.12;
    margin-bottom: 20px;
}
.hero-desc {
    font-size: 17px;
    color: var(--color-text-secondary);
    max-width: 480px;
    margin: 0 auto 36px;
    line-height: 1.6;
}
.hero-actions {
    display: flex;
    gap: 10px;
    justify-content: center;
}
.btn-lg {
    padding: 12px 28px;
    font-size: 16px;
    border-radius: var(--radius-sm);
}

.landing-features {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px 80px;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
}
.feature-card {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 24px;
    transition: border-color var(--transition);
}
.feature-card:hover {
    border-color: #D1D1D6;
}
.feature-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
}
.feature-card h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 6px;
}
.feature-card p {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin: 0;
}

.landing-footer {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 32px 24px 60px;
    text-align: center;
    font-size: 13px;
    color: var(--color-text-secondary);
}
.landing-footer p {
    margin: 0;
}

/* 移动端极窄屏 */
@media (max-width: 400px) {
    .balance-value {
        font-size: 12px;
    }
    .balance-label {
        font-size: 10px;
    }
    .btn {
        padding: 7px 14px;
        font-size: 13px;
    }
}