/* ============================================
   YAML FILE VIEWER - Styles
   Dark mode compatible via CSS variables
   ============================================ */

/* ============================================
   TOOL CONTAINER
   ============================================ */
.tool-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 20px 15px 40px;
}

/* ============================================
   TOOL HEADER
   ============================================ */
.tool-header {
    text-align: center;
    margin-bottom: 30px;
}

.tool-title-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    margin-bottom: 12px;
}

.tool-icon-wrapper {
    width: 56px;
    height: 56px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.tool-icon-wrapper.yaml-theme {
    background: linear-gradient(135deg, #cb4b16, #dc322f);
}

.tool-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.tool-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

/* ============================================
   INPUT SECTION - TABS
   ============================================ */
.input-section {
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    overflow: hidden;
    margin-bottom: 20px;
    transition: background-color var(--transition-speed);
}

.input-tabs {
    display: flex;
    background: var(--card-secondary);
    border-bottom: 1px solid var(--border-color);
    transition: background-color var(--transition-speed);
}

.tab-btn {
    flex: 1;
    padding: 14px 20px;
    background: transparent;
    border: none;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.3s ease;
    position: relative;
    box-shadow: none;
}

.tab-btn:hover {
    color: var(--text-primary);
    background: var(--card-bg);
    transform: none;
    box-shadow: none;
}

.tab-btn.active {
    color: var(--accent-color);
    background: var(--card-bg);
}

.tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--accent-color);
    border-radius: 3px 3px 0 0;
}

.tab-content {
    display: none;
    padding: 25px;
}

.tab-content.active {
    display: block;
}

/* ============================================
   UPLOAD AREA
   ============================================ */
.upload-area {
    border: 2px dashed var(--border-color);
    background: var(--card-secondary);
    border-radius: 12px;
    padding: 50px 30px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.upload-area:hover,
.upload-area.drag-over {
    border-color: var(--accent-color);
    background: var(--info-bg);
}

.upload-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.upload-icon {
    color: var(--accent-color);
    margin-bottom: 10px;
}

.upload-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.upload-subtitle {
    color: var(--text-muted);
    margin: 0;
}

.upload-hint {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--text-light);
    margin-top: 10px;
}

/* ============================================
   PASTE AREA
   ============================================ */
.paste-area {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.paste-area textarea {
    width: 100%;
    min-height: 300px;
    padding: 16px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', 'Consolas', monospace;
    font-size: 14px;
    line-height: 1.6;
    resize: vertical;
    background: var(--input-bg);
    color: var(--text-primary);
    transition: all 0.3s ease;
}

.paste-area textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.15);
}

.paste-area textarea::placeholder {
    color: var(--input-placeholder);
}

.paste-actions {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
    flex-wrap: wrap;
}

/* ============================================
   URL AREA
   ============================================ */
.url-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    padding: 30px 0;
}

.url-input-group {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    max-width: 500px;
    padding: 12px 16px;
    background: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    transition: all 0.3s ease;
}

.url-input-group:focus-within {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.15);
}

.url-input-group input {
    flex: 1;
    border: none;
    background: transparent;
    font-size: 15px;
    color: var(--text-primary);
    outline: none;
}

.url-input-group input::placeholder {
    color: var(--input-placeholder);
}

.url-input-group svg {
    color: var(--text-muted);
}

.url-hint {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--text-light);
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-color), var(--accent-hover));
    color: white;
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(52, 152, 219, 0.4);
}

.btn-secondary {
    background: var(--card-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--card-tertiary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.btn-icon {
    width: 40px;
    height: 40px;
    padding: 0;
    background: var(--card-secondary);
    color: var(--text-muted);
    border: 1px solid var(--border-color);
    border-radius: 8px;
}

.btn-icon:hover {
    background: var(--card-tertiary);
    color: var(--accent-color);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.btn-browse {
    padding: 14px 28px;
    font-size: 16px;
    border-radius: 30px;
}

/* ============================================
   VIEW OPTIONS
   ============================================ */
.view-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--card-bg);
    padding: 12px 20px;
    border-radius: 10px;
    margin-bottom: 15px;
    box-shadow: var(--shadow-sm);
    flex-wrap: wrap;
    gap: 15px;
    transition: background-color var(--transition-speed);
}

.view-toggle {
    display: flex;
    background: var(--card-secondary);
    border-radius: 8px;
    padding: 4px;
    gap: 4px;
}

.view-btn {
    padding: 10px 18px;
    border: none;
    background: transparent;
    color: var(--text-muted);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    border-radius: 6px;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: all 0.2s ease;
    box-shadow: none;
}

.view-btn:hover {
    color: var(--text-primary);
    background: var(--card-bg);
    transform: none;
    box-shadow: none;
}

.view-btn.active {
    background: var(--accent-color);
    color: white;
}

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

/* ============================================
   RESULTS SECTION
   ============================================ */
.results-section {
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    overflow: hidden;
    transition: background-color var(--transition-speed);
}

.file-info-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    padding: 14px 20px;
    background: var(--card-secondary);
    border-bottom: 1px solid var(--border-color);
    transition: background-color var(--transition-speed);
}

.file-info-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--text-muted);
}

.file-info-item svg {
    color: var(--text-light);
}

.file-info-item.status-valid {
    color: var(--success-color);
    font-weight: 600;
}

.file-info-item.status-valid svg {
    color: var(--success-color);
}

.file-info-item.status-error {
    color: var(--error-color);
    font-weight: 600;
}

.file-info-item.status-error svg {
    color: var(--error-color);
}

/* ============================================
   OUTPUT CONTAINER
   ============================================ */
.output-container {
    max-height: 600px;
    overflow: auto;
}

.output-panel {
    padding: 20px;
}

.output-panel pre {
    margin: 0;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', 'Consolas', monospace;
    font-size: 14px;
    line-height: 1.7;
    white-space: pre-wrap;
    word-wrap: break-word;
    color: var(--text-primary);
}

/* ============================================
   SYNTAX HIGHLIGHTING
   ============================================ */
.yaml-key {
    color: #268bd2;
}

.yaml-string {
    color: #2aa198;
}

.yaml-number {
    color: #d33682;
}

.yaml-bool {
    color: #cb4b16;
}

.yaml-null {
    color: #6c71c4;
}

.yaml-comment {
    color: #93a1a1;
    font-style: italic;
}

.yaml-item {
    color: #859900;
}

[data-theme="dark"] .yaml-key {
    color: #60a5fa;
}

[data-theme="dark"] .yaml-string {
    color: #4ade80;
}

[data-theme="dark"] .yaml-number {
    color: #f472b6;
}

[data-theme="dark"] .yaml-bool {
    color: #fb923c;
}

[data-theme="dark"] .yaml-null {
    color: #a78bfa;
}

[data-theme="dark"] .yaml-comment {
    color: #64748b;
}

[data-theme="dark"] .yaml-item {
    color: #a3e635;
}

/* ============================================
   TREE VIEW
   ============================================ */
.tree-node {
    margin-left: 20px;
    position: relative;
}

.tree-node:first-child {
    margin-left: 0;
}

.tree-item {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    padding: 4px 0;
    cursor: default;
}

.tree-toggle {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-muted);
    flex-shrink: 0;
    transition: transform 0.2s ease;
}

.tree-toggle:hover {
    color: var(--accent-color);
}

.tree-toggle.expanded {
    transform: rotate(90deg);
}

.tree-toggle.empty {
    visibility: hidden;
}

.tree-key {
    color: var(--accent-color);
    font-weight: 600;
}

.tree-colon {
    color: var(--text-muted);
}

.tree-value {
    color: var(--text-primary);
}

.tree-value.string {
    color: #2aa198;
}

.tree-value.number {
    color: #d33682;
}

.tree-value.boolean {
    color: #cb4b16;
}

.tree-value.null {
    color: #6c71c4;
    font-style: italic;
}

.tree-type {
    font-size: 11px;
    color: var(--text-light);
    background: var(--card-secondary);
    padding: 2px 6px;
    border-radius: 4px;
    margin-left: 8px;
}

.tree-children {
    display: block;
}

.tree-children.collapsed {
    display: none;
}

[data-theme="dark"] .tree-value.string {
    color: #4ade80;
}

[data-theme="dark"] .tree-value.number {
    color: #f472b6;
}

[data-theme="dark"] .tree-value.boolean {
    color: #fb923c;
}

[data-theme="dark"] .tree-value.null {
    color: #a78bfa;
}

/* ============================================
   ERROR MESSAGE
   ============================================ */
.error-message {
    background: var(--error-bg);
    border: 1px solid var(--error-color);
    border-radius: 10px;
    overflow: hidden;
    margin: 20px 0;
}

.error-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 18px;
    background: rgba(231, 76, 60, 0.15);
    color: var(--error-color);
    font-weight: 600;
}

.error-body {
    padding: 18px;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', 'Consolas', monospace;
    font-size: 13px;
    color: var(--text-primary);
    white-space: pre-wrap;
    line-height: 1.6;
}

/* ============================================
   RELATED TOOLS
   ============================================ */
.related-tools {
    display: flex;
    align-items: center;
    gap: 15px;
    margin: 30px 0;
    padding: 18px 20px;
    background: var(--card-bg);
    border-radius: 10px;
    box-shadow: var(--shadow-sm);
    flex-wrap: wrap;
    transition: background-color var(--transition-speed);
}

.related-label {
    font-weight: 600;
    color: var(--text-muted);
    white-space: nowrap;
}

.related-links {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.related-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    background: var(--card-secondary);
    color: var(--text-primary);
    border-radius: 20px;
    font-size: 13px;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s ease;
}

.related-link:hover {
    background: var(--accent-color);
    color: white;
    transform: translateY(-1px);
}

/* ============================================
   INFO SECTIONS
   ============================================ */
.info-sections {
    display: flex;
    flex-direction: column;
    gap: 25px;
    margin-top: 30px;
}

.info-card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 25px 30px;
    box-shadow: var(--shadow-md);
    transition: background-color var(--transition-speed);
}

.info-card h2 {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.3rem;
    color: var(--text-primary);
    margin: 0 0 20px 0;
}

.info-card h2 svg {
    color: var(--accent-color);
}

/* Steps List */
.steps-list {
    counter-reset: step;
    list-style: none;
    padding: 0;
    margin: 0;
}

.steps-list li {
    position: relative;
    padding-left: 50px;
    margin-bottom: 16px;
    line-height: 1.6;
    color: var(--text-secondary);
}

.steps-list li::before {
    content: counter(step);
    counter-increment: step;
    position: absolute;
    left: 0;
    top: 0;
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--accent-color), var(--accent-hover));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 14px;
}

.steps-list li:last-child {
    margin-bottom: 0;
}

/* Tips Grid */
.tips-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.tip-item {
    display: flex;
    gap: 15px;
    padding: 18px;
    background: var(--card-secondary);
    border-radius: 10px;
    transition: all 0.3s ease;
}

.tip-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.tip-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--accent-color), var(--accent-hover));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    flex-shrink: 0;
}

.tip-content h4 {
    margin: 0 0 6px 0;
    font-size: 15px;
    color: var(--text-primary);
}

.tip-content p {
    margin: 0;
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.5;
}

/* YAML Info */
.yaml-info p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
}

.yaml-example {
    background: var(--card-secondary);
    border-radius: 10px;
    overflow: hidden;
}

.yaml-example h4 {
    margin: 0;
    padding: 12px 18px;
    background: var(--card-tertiary);
    font-size: 13px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.yaml-example pre {
    margin: 0;
    padding: 18px;
    overflow-x: auto;
}

.yaml-example code {
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', 'Consolas', monospace;
    font-size: 13px;
    line-height: 1.7;
}

/* FAQ */
.faq-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.faq-item {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 18px;
    background: var(--card-secondary);
    border: none;
    cursor: pointer;
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    text-align: left;
    transition: all 0.2s ease;
    box-shadow: none;
}

.faq-question:hover {
    background: var(--card-tertiary);
    transform: none;
    box-shadow: none;
}

.faq-question svg {
    color: var(--text-muted);
    transition: transform 0.3s ease;
    flex-shrink: 0;
}

.faq-item.open .faq-question svg {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item.open .faq-answer {
    max-height: 500px;
}

.faq-answer p {
    padding: 18px;
    margin: 0;
    color: var(--text-secondary);
    line-height: 1.6;
}

.faq-answer code {
    background: var(--card-secondary);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Monaco', 'Menlo', monospace;
    font-size: 13px;
}

.faq-answer a {
    color: var(--accent-color);
}

/* Tools Grid */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 15px;
}

.tool-link-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    padding: 20px 15px;
    background: var(--card-secondary);
    border-radius: 10px;
    text-decoration: none;
    color: var(--text-primary);
    transition: all 0.3s ease;
}

.tool-link-card:hover {
    background: var(--accent-color);
    color: white;
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.tool-link-card svg {
    color: var(--accent-color);
}

.tool-link-card:hover svg {
    color: white;
}

.tool-link-card span {
    font-size: 13px;
    font-weight: 600;
    text-align: center;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
    .tool-container {
        padding: 15px 10px 30px;
    }
    
    .tool-title {
        font-size: 1.6rem;
    }
    
    .tool-description {
        font-size: 1rem;
    }
    
    .input-tabs {
        flex-wrap: wrap;
    }
    
    .tab-btn {
        flex: 1 1 auto;
        padding: 12px 15px;
        font-size: 13px;
    }
    
    .tab-content {
        padding: 20px 15px;
    }
    
    .upload-area {
        padding: 35px 20px;
    }
    
    .paste-actions {
        flex-direction: column;
    }
    
    .paste-actions .btn {
        width: 100%;
    }
    
    .view-options {
        padding: 10px 15px;
    }
    
    .view-toggle {
        width: 100%;
        justify-content: center;
    }
    
    .view-btn {
        padding: 8px 14px;
        font-size: 13px;
    }
    
    .view-actions {
        width: 100%;
        justify-content: center;
    }
    
    .file-info-bar {
        gap: 12px;
        padding: 12px 15px;
    }
    
    .file-info-item {
        font-size: 12px;
    }
    
    .output-panel {
        padding: 15px;
    }
    
    .related-tools {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .info-card {
        padding: 20px;
    }
    
    .info-card h2 {
        font-size: 1.15rem;
    }
    
    .steps-list li {
        padding-left: 42px;
    }
    
    .steps-list li::before {
        width: 28px;
        height: 28px;
        font-size: 13px;
    }
    
    .tips-grid {
        grid-template-columns: 1fr;
    }
    
    .tools-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .tool-title-row {
        flex-direction: column;
        gap: 10px;
    }
    
    .tool-icon-wrapper {
        width: 48px;
        height: 48px;
    }
    
    .tool-icon-wrapper svg {
        width: 26px;
        height: 26px;
    }
    
    .tab-btn {
        padding: 10px 12px;
        font-size: 12px;
    }
    
    .tab-btn span {
        display: none;
    }
    
    .btn-browse {
        padding: 12px 24px;
        font-size: 15px;
    }
    
    .output-container {
        max-height: 400px;
    }
    
    .tools-grid {
        grid-template-columns: 1fr 1fr;
        gap: 10px;
    }
    
    .tool-link-card {
        padding: 15px 10px;
    }
}

/* ============================================
   REDUCED MOTION
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ============================================
   COPY SUCCESS TOAST
   ============================================ */
.copy-toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--success-color);
    color: white;
    padding: 12px 24px;
    border-radius: 30px;
    font-weight: 600;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 4px 20px rgba(46, 204, 113, 0.4);
    z-index: 1000;
    opacity: 0;
    transition: all 0.3s ease;
}

.copy-toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

/* ============================================
   LINE NUMBERS
   ============================================ */
.line-numbers {
    counter-reset: line;
}

.line-numbers .line {
    display: block;
}

.line-numbers .line::before {
    counter-increment: line;
    content: counter(line);
    display: inline-block;
    width: 30px;
    margin-right: 15px;
    text-align: right;
    color: var(--text-light);
    user-select: none;
}