/* ========== Tools 頁面專屬樣式 ========== */

/* Hero (小型) */
.tools-hero {
    padding-top: calc(var(--nav-height) + 40px);
    padding-bottom: 40px;
    text-align: center;
    position: relative;
    z-index: 1;
}

.tools-hero-title {
    font-family: var(--font-tech);
    font-size: clamp(1.8rem, 5vw, 2.8rem);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 12px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tools-hero-title .title-icon {
    -webkit-text-fill-color: initial;
}

.tools-hero-desc {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 500px;
    margin: 0 auto;
}

/* 工具卡片網格 */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.tool-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 32px 24px;
    text-align: center;
    backdrop-filter: blur(10px);
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.tool-card:hover::before {
    transform: scaleX(1);
}

.tool-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent-purple);
    box-shadow: var(--shadow-glow);
    transform: translateY(-8px);
}

.tool-card.active {
    border-color: var(--accent-blue);
    box-shadow: 0 0 25px rgba(0, 212, 255, 0.25);
}

.tool-card-icon {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    background: var(--gradient-glow);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    font-size: 1.6rem;
    color: var(--accent-blue);
    transition: var(--transition);
}

.tool-card:hover .tool-card-icon {
    border-color: var(--accent-blue);
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.3);
}

.tool-card h3 {
    font-family: var(--font-tech);
    font-size: 1.05rem;
    margin-bottom: 8px;
}

.tool-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
}

/* 工具工作區 */
.tool-workspace {
    padding-top: 20px;
}

.btn-back {
    margin-bottom: 24px;
    font-size: 0.9rem;
}

.tool-panel {
    display: none;
    animation: fadeSlideIn 0.4s ease;
}

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

@keyframes fadeSlideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.tool-panel-title {
    font-family: var(--font-tech);
    font-size: 1.4rem;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--accent-blue);
}

.tool-panel-title i {
    font-size: 1.2rem;
}

/* 工具操作列 */
.tool-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 16px;
    align-items: center;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.85rem;
    border-radius: 8px;
}

.tool-select {
    padding: 8px 12px;
    background: rgba(10, 10, 30, 0.8);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--transition);
}

.tool-select:focus {
    outline: none;
    border-color: var(--accent-blue);
}

.tool-select option {
    background: var(--bg-primary);
    color: var(--text-primary);
}

/* 雙欄佈局 */
.tool-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.tool-input-area,
.tool-output-area {
    display: flex;
    flex-direction: column;
}

.tool-input-area label,
.tool-output-area label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
    font-weight: 600;
}

.tool-input-area textarea,
.tool-output-area textarea {
    width: 100%;
    padding: 14px 16px;
    background: rgba(10, 10, 30, 0.8);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    color: var(--text-primary);
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 0.9rem;
    resize: vertical;
    transition: var(--transition);
    line-height: 1.6;
    flex: 1;
}

.tool-input-area textarea:focus,
.tool-output-area textarea:focus {
    outline: none;
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

/* 輸出 pre */
.output-pre {
    width: 100%;
    padding: 14px 16px;
    background: rgba(10, 10, 30, 0.8);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    color: var(--accent-cyan);
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 0.85rem;
    line-height: 1.6;
    overflow: auto;
    white-space: pre-wrap;
    word-break: break-all;
    flex: 1;
    min-height: 300px;
    max-height: 500px;
}

/* JSON 錯誤 */
.json-error {
    margin-top: 10px;
    padding: 12px 16px;
    background: rgba(255, 71, 87, 0.1);
    border: 1px solid rgba(255, 71, 87, 0.3);
    border-radius: 10px;
    color: #ff4757;
    font-size: 0.9rem;
    font-family: monospace;
}

/* ===== 文字統計器 ===== */
.stats-result {
    background: rgba(10, 10, 30, 0.8);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 16px;
}

.stat-row {
    display: flex;
    justify-content: space-between;
    padding: 10px 8px;
    border-bottom: 1px solid rgba(168, 85, 247, 0.1);
    font-size: 0.95rem;
}

.stat-row:last-child {
    border-bottom: none;
}

.stat-row span:first-child {
    color: var(--text-secondary);
}

.stat-row span:last-child {
    color: var(--accent-blue);
    font-family: var(--font-tech);
    font-weight: 700;
}

.freq-table-wrapper {
    max-height: 300px;
    overflow-y: auto;
}

.freq-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.freq-table th {
    padding: 10px 12px;
    text-align: left;
    color: var(--accent-purple);
    font-family: var(--font-tech);
    font-size: 0.8rem;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    background: var(--bg-primary);
}

.freq-table td {
    padding: 8px 12px;
    border-bottom: 1px solid rgba(168, 85, 247, 0.08);
    color: var(--text-primary);
}

.freq-table td:first-child {
    color: var(--text-muted);
    width: 50px;
}

.freq-table td:last-child {
    color: var(--accent-blue);
    font-family: var(--font-tech);
    font-weight: 700;
}

.empty-cell {
    color: var(--text-muted);
    text-align: center;
    padding: 20px;
}

/* ===== 正則表達式 ===== */
.regex-input-row {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-bottom: 16px;
    background: rgba(10, 10, 30, 0.8);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 8px 16px;
}

.regex-slash {
    color: var(--accent-purple);
    font-family: monospace;
    font-size: 1.2rem;
    font-weight: 700;
}

.regex-input-row input {
    background: transparent;
    border: none;
    color: var(--accent-cyan);
    font-family: 'Consolas', monospace;
    font-size: 1rem;
    flex: 1;
    padding: 8px 4px;
}

.regex-input-row input:focus {
    outline: none;
}

.regex-flags-input {
    max-width: 60px;
    color: var(--accent-pink) !important;
}

.match-count {
    font-size: 0.8rem;
    color: var(--accent-cyan);
    font-family: var(--font-tech);
    margin-left: 8px;
}

.regex-highlight-area {
    background: rgba(10, 10, 30, 0.8);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 14px 16px;
    min-height: 200px;
    max-height: 350px;
    overflow-y: auto;
    font-family: 'Consolas', monospace;
    font-size: 0.9rem;
    line-height: 1.8;
    white-space: pre-wrap;
    word-break: break-all;
    color: var(--text-primary);
}

.regex-highlight-area .regex-match {
    background: rgba(0, 212, 255, 0.25);
    border: 1px solid rgba(0, 212, 255, 0.5);
    border-radius: 3px;
    padding: 1px 2px;
    color: var(--accent-blue);
}

.match-details {
    background: rgba(10, 10, 30, 0.8);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 14px 16px;
    max-height: 200px;
    overflow-y: auto;
    font-size: 0.85rem;
}

.match-item {
    padding: 8px 0;
    border-bottom: 1px solid rgba(168, 85, 247, 0.08);
    font-family: monospace;
}

.match-item:last-child {
    border-bottom: none;
}

.match-item .match-index {
    color: var(--accent-purple);
    font-size: 0.8rem;
}

.match-item .match-value {
    color: var(--accent-cyan);
    margin-left: 8px;
}

.match-item .match-groups {
    color: var(--text-muted);
    font-size: 0.8rem;
    margin-top: 2px;
}

/* ===== Markdown 預覽 ===== */
.markdown-preview {
    background: rgba(10, 10, 30, 0.8);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    min-height: 350px;
    max-height: 500px;
    overflow-y: auto;
    flex: 1;
    line-height: 1.8;
}

.markdown-preview h1,
.markdown-preview h2,
.markdown-preview h3,
.markdown-preview h4 {
    font-family: var(--font-tech);
    margin: 16px 0 8px;
    color: var(--text-primary);
}

.markdown-preview h1 { font-size: 1.6rem; border-bottom: 1px solid var(--border-color); padding-bottom: 8px; }
.markdown-preview h2 { font-size: 1.3rem; }
.markdown-preview h3 { font-size: 1.1rem; }

.markdown-preview p { margin-bottom: 12px; color: var(--text-secondary); }
.markdown-preview a { color: var(--accent-blue); text-decoration: underline; }
.markdown-preview strong { color: var(--text-primary); }
.markdown-preview em { color: var(--accent-pink); }

.markdown-preview ul,
.markdown-preview ol {
    padding-left: 24px;
    margin-bottom: 12px;
    color: var(--text-secondary);
}

.markdown-preview li { margin-bottom: 4px; }

.markdown-preview code {
    background: rgba(168, 85, 247, 0.15);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Consolas', monospace;
    font-size: 0.85em;
    color: var(--accent-cyan);
}

.markdown-preview pre {
    background: rgba(5, 5, 20, 0.9);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 14px 16px;
    overflow-x: auto;
    margin-bottom: 12px;
}

.markdown-preview pre code {
    background: transparent;
    padding: 0;
    font-size: 0.85rem;
    line-height: 1.6;
}

.markdown-preview blockquote {
    border-left: 3px solid var(--accent-purple);
    padding-left: 16px;
    margin: 12px 0;
    color: var(--text-muted);
    font-style: italic;
}

.markdown-preview img {
    max-width: 100%;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.markdown-preview table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 12px;
}

.markdown-preview th,
.markdown-preview td {
    border: 1px solid var(--border-color);
    padding: 8px 12px;
    text-align: left;
}

.markdown-preview th {
    background: rgba(168, 85, 247, 0.1);
    color: var(--accent-purple);
}

/* ===== 顏色工具 ===== */
.color-section {
    margin-bottom: 32px;
}

.color-subtitle {
    font-family: var(--font-tech);
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.color-converter {
    display: flex;
    gap: 24px;
    align-items: flex-start;
}

.color-preview-box {
    width: 120px;
    height: 120px;
    border-radius: 16px;
    border: 2px solid var(--border-color);
    background: #00d4ff;
    flex-shrink: 0;
    transition: background 0.2s ease;
    box-shadow: 0 0 30px rgba(0, 212, 255, 0.2);
}

.color-inputs {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.color-input-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

.color-input-group label {
    width: 55px;
    font-size: 0.85rem;
    color: var(--text-muted);
    font-family: var(--font-tech);
    flex-shrink: 0;
}

.color-input-group input[type="text"] {
    flex: 1;
    padding: 8px 12px;
    background: rgba(10, 10, 30, 0.8);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-family: 'Consolas', monospace;
    font-size: 0.9rem;
    transition: var(--transition);
}

.color-input-group input[type="text"]:focus {
    outline: none;
    border-color: var(--accent-blue);
}

.color-input-group input[type="color"] {
    width: 44px;
    height: 36px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    background: transparent;
    padding: 2px;
}

.color-input-group input[type="range"] {
    flex: 1;
    accent-color: var(--accent-purple);
}

.btn-copy-sm {
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-muted);
    padding: 6px 8px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.8rem;
}

.btn-copy-sm:hover {
    border-color: var(--accent-blue);
    color: var(--accent-blue);
}

/* 漸層產生器 */
.gradient-builder {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 24px;
}

.gradient-controls {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    margin-bottom: 16px;
    align-items: flex-end;
}

.gradient-preview {
    width: 100%;
    height: 100px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    margin-bottom: 16px;
    transition: background 0.3s ease;
}

.gradient-code-wrapper {
    display: flex;
    align-items: center;
    gap: 12px;
    background: rgba(10, 10, 30, 0.8);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 12px 16px;
}

.gradient-code-wrapper code {
    flex: 1;
    font-family: 'Consolas', monospace;
    font-size: 0.85rem;
    color: var(--accent-cyan);
    word-break: break-all;
}

/* ===== Toast 通知 ===== */
.tools-toast {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: rgba(15, 15, 46, 0.95);
    border: 1px solid var(--accent-cyan);
    border-radius: 10px;
    padding: 12px 20px;
    color: var(--accent-cyan);
    font-size: 0.9rem;
    z-index: 9999;
    transform: translateY(100px);
    opacity: 0;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    box-shadow: 0 0 20px rgba(6, 255, 165, 0.2);
}

.tools-toast.show {
    transform: translateY(0);
    opacity: 1;
}

.tools-toast.error {
    border-color: #ff4757;
    color: #ff4757;
    box-shadow: 0 0 20px rgba(255, 71, 87, 0.2);
}

/* ===== 手機導航 ===== */
@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: var(--nav-height);
        left: 0;
        right: 0;
        background: rgba(10, 10, 26, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 20px;
        gap: 5px;
        transform: translateY(-100%);
        opacity: 0;
        transition: var(--transition);
        border-bottom: 1px solid var(--border-color);
        pointer-events: none;
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }
}

/* ===== 響應式 ===== */
@media (max-width: 768px) {
    .tools-grid {
        grid-template-columns: 1fr 1fr;
    }

    .tool-layout {
        grid-template-columns: 1fr;
    }

    .color-converter {
        flex-direction: column;
        align-items: center;
    }

    .gradient-controls {
        flex-direction: column;
    }

    .tool-actions {
        flex-wrap: wrap;
    }

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

@media (max-width: 480px) {
    .tools-grid {
        grid-template-columns: 1fr;
    }
}