/* ===== 工具页面基础 ===== */
.tools-page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ===== 顶部导航 ===== */
.tools-nav {
    position: relative;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 32px;
    background: linear-gradient(to bottom, rgba(10,10,15,0.9), transparent);
    gap: 20px;
}

.tools-nav-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: 1px;
}

/* 返回主页按钮（与音乐空间一致） */
.back-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition);
    padding: 8px 16px;
    border-radius: 12px;
    background: var(--bg-glass);
    border: 1px solid var(--border);
}

.back-btn:hover {
    color: var(--text-primary);
    background: var(--bg-glass-hover);
    border-color: var(--border-hover);
    transform: translateX(-3px);
}

.tools-search {
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--bg-glass);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 8px 16px;
    transition: var(--transition);
    min-width: 200px;
}

.tools-search:focus-within {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.tools-search svg {
    color: var(--text-muted);
    flex-shrink: 0;
}

.tools-search input {
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 0.9rem;
    font-family: inherit;
    outline: none;
    width: 100%;
}

.tools-search input::placeholder {
    color: var(--text-muted);
}

/* ===== 主内容区 ===== */
.tools-main {
    position: relative;
    z-index: 5;
    flex: 1;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
    gap: 20px;
    padding: 20px 32px 40px;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}

/* ===== 工具卡片 ===== */
.tool-card {
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
    animation: fade-in-up 0.6s ease-out both;
}

.tool-card:nth-child(1) { animation-delay: 0.05s; }
.tool-card:nth-child(2) { animation-delay: 0.1s; }
.tool-card:nth-child(3) { animation-delay: 0.15s; }
.tool-card:nth-child(4) { animation-delay: 0.2s; }
.tool-card:nth-child(5) { animation-delay: 0.25s; }
.tool-card:nth-child(6) { animation-delay: 0.3s; }
.tool-card:nth-child(7) { animation-delay: 0.35s; }
.tool-card:nth-child(8) { animation-delay: 0.4s; }
.tool-card:nth-child(9) { animation-delay: 0.45s; }

.tool-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0,0,0,0.4);
}

.tool-card.hidden {
    display: none;
}

.tool-header {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
}

.tool-icon {
    width: 44px;
    height: 44px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    flex-shrink: 0;
}

.tool-header h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 2px;
}

.tool-header p {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.tool-body {
    padding: 20px 24px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

/* ===== 通用输入组件 ===== */
.input-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex: 1;
}

.input-group label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.input-group input,
.input-group select,
.tool-textarea {
    padding: 10px 14px;
    background: var(--bg-glass);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.9rem;
    font-family: 'JetBrains Mono', 'Inter', monospace;
    outline: none;
    transition: var(--transition);
    width: 100%;
}

.input-group input:focus,
.input-group select:focus,
.tool-textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.input-group input::placeholder,
.tool-textarea::placeholder {
    color: var(--text-muted);
}

.input-group input[type="color"] {
    padding: 4px;
    height: 40px;
    cursor: pointer;
}

.input-row {
    display: flex;
    gap: 10px;
}

.tool-textarea {
    min-height: 80px;
    resize: vertical;
    font-family: 'JetBrains Mono', 'Inter', monospace;
    line-height: 1.6;
}

.tool-textarea.json-input {
    min-height: 100px;
}

.tool-textarea.result {
    background: rgba(0,0,0,0.2);
}

/* ===== 按钮 ===== */
.tool-btn {
    padding: 10px 20px;
    background: linear-gradient(135deg, var(--accent), #8b5cf6);
    border: none;
    border-radius: var(--radius-sm);
    color: #fff;
    font-size: 0.9rem;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
}

.tool-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px var(--accent-glow);
}

.tool-btn.small {
    padding: 8px 14px;
    font-size: 0.8rem;
}

/* ===== 颜色转换器 ===== */
.color-preview {
    width: 100%;
    height: 60px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    transition: background 0.3s ease;
    position: relative;
    overflow: hidden;
}

.color-preview::after {
    content: attr(data-hex);
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    font-weight: 500;
    color: #fff;
    text-shadow: 0 1px 3px rgba(0,0,0,0.5);
    opacity: 0;
    transition: opacity 0.3s;
}

.color-preview:hover::after {
    opacity: 1;
}

.color-inputs {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

/* ===== 密码生成器 ===== */
.password-display {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    background: var(--bg-glass);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-family: 'JetBrains Mono', monospace;
    font-size: 1rem;
    word-break: break-all;
    min-height: 48px;
}

.password-display span {
    flex: 1;
    color: var(--text-primary);
}

.password-copy {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: var(--bg-glass);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    flex-shrink: 0;
}

.password-copy:hover {
    background: var(--bg-glass-hover);
    color: var(--text-primary);
}

.password-strength {
    height: 4px;
    background: var(--bg-glass);
    border-radius: 2px;
    overflow: hidden;
}

.strength-bar {
    height: 100%;
    width: 0%;
    border-radius: 2px;
    transition: all 0.3s ease;
}

.strength-bar.weak { width: 33%; background: #f43f5e; }
.strength-bar.medium { width: 66%; background: #f59e0b; }
.strength-bar.strong { width: 100%; background: #10b981; }

.password-options {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.toggle-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 0.85rem;
    color: var(--text-secondary);
    padding: 6px 0;
}

.toggle-label input {
    width: 18px;
    height: 18px;
    accent-color: var(--accent);
    cursor: pointer;
}

.password-length {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.password-length label {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.password-length input[type="range"] {
    width: 100%;
    height: 6px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--bg-glass);
    border-radius: 3px;
    outline: none;
}

.password-length input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), #8b5cf6);
    cursor: pointer;
    box-shadow: 0 2px 8px var(--accent-glow);
}

/* ===== 文本统计 ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
}

.stat-box {
    background: var(--bg-glass);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 12px;
    text-align: center;
    transition: var(--transition);
}

.stat-box:hover {
    border-color: var(--border-hover);
    transform: translateY(-2px);
}

.stat-value {
    display: block;
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    font-family: 'JetBrains Mono', monospace;
}

.stat-name {
    display: block;
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-top: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ===== 二维码 ===== */
.qr-options {
    display: flex;
    gap: 10px;
}

.qr-result {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 200px;
    background: var(--bg-glass);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
}

.qr-placeholder {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.qr-result canvas,
.qr-result img {
    border-radius: 8px;
}

/* ===== JSON ===== */
.json-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.json-status {
    font-size: 0.8rem;
    padding: 6px 12px;
    border-radius: 8px;
    text-align: center;
    min-height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.json-status.success {
    background: rgba(16, 185, 129, 0.1);
    color: #10b981;
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.json-status.error {
    background: rgba(244, 63, 94, 0.1);
    color: #f43f5e;
    border: 1px solid rgba(244, 63, 94, 0.2);
}

/* ===== 时间戳 ===== */
.ts-arrow {
    text-align: center;
    font-size: 1.5rem;
    color: var(--accent);
    opacity: 0.6;
}

.ts-info {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-align: center;
    padding: 8px;
    background: var(--bg-glass);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
}

/* ===== 进制转换 ===== */
.base-inputs {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.base-inputs .input-group input {
    font-family: 'JetBrains Mono', monospace;
    text-transform: uppercase;
}

/* ===== 单位换算 ===== */
.unit-tabs,
.b64-tabs {
    display: flex;
    gap: 6px;
    margin-bottom: 4px;
}

.unit-tab,
.b64-tab {
    padding: 6px 14px;
    background: var(--bg-glass);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-muted);
    font-size: 0.8rem;
    font-family: inherit;
    cursor: pointer;
    transition: var(--transition);
}

.unit-tab:hover,
.b64-tab:hover {
    background: var(--bg-glass-hover);
    color: var(--text-secondary);
}

.unit-tab.active,
.b64-tab.active {
    background: linear-gradient(135deg, var(--accent), #8b5cf6);
    border-color: transparent;
    color: #fff;
}

.unit-panel {
    display: none;
}

.unit-panel.active {
    display: block;
}

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

.unit-row input {
    flex: 1;
    min-width: 80px;
}

.unit-row select {
    min-width: 100px;
}

.unit-eq {
    color: var(--accent);
    font-weight: 600;
    font-size: 1.1rem;
}

/* ===== Base64 ===== */
.b64-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

/* ===== 随机数 ===== */
.random-result {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 60px;
    background: var(--bg-glass);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    gap: 8px;
    flex-wrap: wrap;
    padding: 10px;
}

.random-number {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent);
    background: linear-gradient(135deg, var(--accent), #8b5cf6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.random-divider {
    height: 1px;
    background: var(--border);
    margin: 4px 0;
}

.dice-section {
    padding-top: 4px;
}

/* ===== 页脚 ===== */
.tools-footer {
    margin-top: auto;
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
    .tools-nav {
        flex-wrap: wrap;
        padding: 12px 16px;
        gap: 12px;
    }

    .tools-search {
        width: 100%;
        order: 3;
    }

    .tools-main {
        grid-template-columns: 1fr;
        padding: 16px;
        gap: 16px;
    }

    .tool-card {
        animation-delay: 0s !important;
    }

    .input-row {
        flex-wrap: wrap;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .password-options {
        grid-template-columns: 1fr;
    }

    .qr-options {
        flex-wrap: wrap;
    }

    .unit-row {
        flex-direction: column;
        align-items: stretch;
    }

    .unit-row input,
    .unit-row select {
        width: 100%;
    }

    .unit-eq {
        text-align: center;
        transform: rotate(90deg);
    }
}