/* bts-frontend.css */

:root {
    --bts-primary: #4F46E5;
    --bts-primary-hover: #4338CA;
    --bts-bg: #f9fafb;
    --bts-text: #1f2937;
    --bts-text-light: #6b7280;
    --bts-border: #e5e7eb;
    --bts-white: #ffffff;
    --bts-error: #ef4444;
    --bts-success: #10b981;
}

.bts-container {
    display: flex;
    flex-wrap: wrap;
    background: var(--bts-white);
    border: 1px solid var(--bts-border);
    border-radius: 8px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    color: var(--bts-text);
    margin: 20px 0;
}

.bts-sidebar {
    width: 250px;
    background: var(--bts-bg);
    border-right: 1px solid var(--bts-border);
}

.bts-tabs {
    list-style: none;
    margin: 0;
    padding: 0;
}

.bts-tab-item {
    padding: 15px 20px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    border-bottom: 1px solid var(--bts-border);
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 10px;
}

.bts-tab-item:hover {
    background: #f3f4f6;
}

.bts-tab-item.active {
    background: var(--bts-white);
    border-left: 4px solid var(--bts-primary);
    color: var(--bts-primary);
}

.bts-content-area {
    flex: 1;
    padding: 30px;
    min-width: 300px;
}

.bts-tool-panel {
    display: none;
    animation: btsFadeIn 0.3s ease-in-out;
}

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

@keyframes btsFadeIn {
    from { opacity: 0; transform: translateY(5px); }
    to { opacity: 1; transform: translateY(0); }
}

.bts-tool-panel h3 {
    margin-top: 0;
    margin-bottom: 5px;
    color: var(--bts-text);
    font-size: 24px;
}

.bts-tool-panel p {
    color: var(--bts-text-light);
    margin-bottom: 25px;
    font-size: 15px;
}

.bts-form-group {
    margin-bottom: 20px;
}

.bts-form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    font-size: 14px;
}

.bts-form-group input[type="text"],
.bts-form-group input[type="number"],
.bts-form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--bts-border);
    border-radius: 6px;
    font-size: 15px;
    transition: border-color 0.2s;
}

.bts-form-group input:focus,
.bts-form-group textarea:focus {
    outline: none;
    border-color: var(--bts-primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.bts-btn {
    background: var(--bts-primary);
    color: var(--bts-white);
    border: none;
    padding: 12px 24px;
    border-radius: 6px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}

.bts-btn:hover {
    background: var(--bts-primary-hover);
}

.bts-result-box {
    margin-top: 30px;
    padding: 20px;
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 6px;
    font-size: 15px;
    white-space: pre-wrap;
    line-height: 1.6;
}

/* Spinner */
.bts-loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255,255,255,.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
    vertical-align: middle;
    margin-left: 10px;
}

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

/* SERP Preview CSS */
.bts-serp-preview {
    font-family: arial, sans-serif;
    max-width: 600px;
}
.bts-serp-url {
    color: #202124;
    font-size: 14px;
    margin-bottom: 4px;
}
.bts-serp-title {
    color: #1a0dab;
    font-size: 20px;
    line-height: 1.3;
    cursor: pointer;
}
.bts-serp-title:hover {
    text-decoration: underline;
}
.bts-serp-meta {
    color: #4d5156;
    font-size: 14px;
    line-height: 1.58;
    margin-top: 4px;
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    .bts-container {
        flex-direction: column;
    }
    .bts-sidebar {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid var(--bts-border);
    }
    .bts-tabs {
        display: flex;
        overflow-x: auto;
    }
    .bts-tab-item {
        white-space: nowrap;
        border-bottom: none;
        border-right: 1px solid var(--bts-border);
    }
    .bts-tab-item.active {
        border-left: none;
        border-bottom: 4px solid var(--bts-primary);
    }
}