/* Article page specific styles */

/* Page Header */
.page-header {
    padding: 120px 0 60px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.page-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 20px;
    position: relative;
    z-index: 1;
}

.page-description {
    font-size: 1.2rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

/* Tools Navigation */
.tools-nav {
    background: white;
    padding: 30px 0;
    border-bottom: 1px solid var(--border-color);
    z-index: 100;
}

.nav-tabs {
    display: flex;
    gap: 10px;
    justify-content: center;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 12px 24px;
    border: 2px solid var(--border-color);
    background: white;
    color: var(--text-secondary);
    border-radius: 25px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.tab-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.tab-btn.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

/* Tools Section */
.tools-section {
    padding: 60px 0;
    background: var(--light-bg);
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 30px;
}

.tool-item {
    background: white;
    border-radius: 16px;
    padding: 30px;
    box-shadow: var(--shadow-light);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.tool-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-heavy);
}

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

.tool-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.tool-icon {
    font-size: 2rem;
    width: 60px;
    height: 60px;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    flex-shrink: 0;
}

.tool-header h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    flex: 1;
}

.tool-badge {
    background: var(--accent-color);
    color: white;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
}

.tool-description {
    color: var(--text-secondary);
    margin-bottom: 25px;
    line-height: 1.6;
    font-weight: 500;
}

/* Tool Interface */
.tool-interface {
    border-top: 1px solid var(--border-color);
    padding-top: 25px;
}

.input-group {
    margin-bottom: 20px;
}

.input-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-primary);
}

.input-group input,
.input-group select,
.input-group textarea {
    width: 100%;
    padding: 12px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 14px;
    transition: var(--transition);
    font-family: inherit;
    font-weight: 500;
}

.input-group input:focus,
.input-group select:focus,
.input-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.input-group textarea {
    resize: vertical;
    min-height: 80px;
    font-weight: 500;
}

.input-group input[type="color"] {
    width: 60px;
    height: 40px;
    padding: 0;
    border: none;
    cursor: pointer;
}

.input-group input[type="file"] {
    padding: 8px;
    background: var(--light-bg);
}

.input-group input[type="range"] {
    padding: 0;
    height: 6px;
    background: var(--border-color);
    border: none;
    border-radius: 3px;
}

.input-group input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    border-radius: 50%;
    cursor: pointer;
}

.input-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

/* Checkbox Group */
.checkbox-group {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin-bottom: 20px;
}

.checkbox-item {
    display: flex;
    align-items: center;
    cursor: pointer;
    position: relative;
    padding-left: 30px;
    font-size: 14px;
    color: var(--text-primary);
    font-weight: 500;
}

.checkbox-item input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    cursor: pointer;
    width: 0;
    height: 0;
}

.checkmark {
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    height: 20px;
    width: 20px;
    background: white;
    border: 2px solid var(--border-color);
    border-radius: 4px;
    transition: var(--transition);
}

.checkbox-item:hover .checkmark {
    border-color: var(--primary-color);
}

.checkbox-item input:checked~.checkmark {
    background: var(--primary-color);
    border-color: var(--primary-color);
}

.checkmark::after {
    content: "";
    position: absolute;
    display: none;
    left: 6px;
    top: 2px;
    width: 6px;
    height: 10px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.checkbox-item input:checked~.checkmark::after {
    display: block;
}

/* Tool Actions */
.tool-actions {
    display: flex;
    gap: 15px;
    margin-bottom: 25px;
    flex-wrap: wrap;
}

.tool-actions .btn {
    flex: 1;
    min-width: 120px;
}

/* Tool Result */
.tool-result {
    background: var(--light-bg);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 20px;
    min-height: 80px;
    font-family: 'Courier New', monospace;
    font-size: 14px;
    word-break: break-all;
    position: relative;
    transition: var(--transition);
}

.tool-result.has-content {
    background: white;
    border-color: var(--success-color);
}

.tool-result.error {
    background: #fef2f2;
    border-color: var(--error-color);
    color: var(--error-color);
}

.tool-result canvas {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 0 auto;
}

.tool-result .copy-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 6px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 12px;
    opacity: 0;
    transition: var(--transition);
}

.tool-result:hover .copy-btn {
    opacity: 1;
}

/* Color Result Specific */
.color-analysis {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: 15px;
    text-align: center;
}

.color-value {
    background: white;
    padding: 15px;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.color-value strong {
    display: block;
    margin-bottom: 8px;
    color: var(--text-primary);
    font-size: 12px;
    text-transform: uppercase;
}

.color-palette {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 10px;
    margin-top: 15px;
}

.palette-color {
    height: 60px;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    cursor: pointer;
    position: relative;
    transition: var(--transition);
}

.palette-color:hover {
    transform: scale(1.05);
}

.palette-color::after {
    content: attr(data-color);
    position: absolute;
    bottom: -25px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 10px;
    color: var(--text-secondary);
    mix-blend-mode: difference;
}

/* Active nav link */
.nav-link.active {
    color: var(--primary-color);
}

.nav-link.active::after {
    width: 100%;
}

/* Responsive Design */
@media (max-width: 768px) {
    .page-title {
        font-size: 2.5rem;
    }

    .page-description {
        font-size: 1.1rem;
    }

    .tools-grid {
        grid-template-columns: 1fr;
    }

    .tool-item {
        padding: 20px;
    }

    .tool-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .input-row {
        grid-template-columns: 1fr;
    }

    .checkbox-group {
        grid-template-columns: 1fr;
    }

    .tool-actions {
        flex-direction: column;
    }

    .tool-actions .btn {
        flex: none;
    }

    .nav-tabs {
        gap: 8px;
    }

    .tab-btn {
        padding: 10px 16px;
        font-size: 14px;
    }

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

    .color-palette {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 480px) {
    .page-header {
        padding: 100px 0 40px;
    }

    .page-title {
        font-size: 2rem;
    }

    .tools-section {
        padding: 40px 0;
    }

    .tool-item {
        padding: 15px;
    }

    .tool-icon {
        width: 50px;
        height: 50px;
        font-size: 1.5rem;
    }

    .tool-header h3 {
        font-size: 1.3rem;
    }
}