/* ============================================
   Google-Inspired Color System
   ============================================ */
:root {
    /* Google Brand Colors */
    --google-blue: #4285F4;
    --google-red: #EA4335;
    --google-yellow: #FBBC04;
    --google-green: #34A853;
    
    /* Neutral Grays */
    --gray-50: #F8F9FA;
    --gray-100: #F1F3F4;
    --gray-200: #E8EAED;
    --gray-300: #DADCE0;
    --gray-400: #BDC1C6;
    --gray-500: #9AA0A6;
    --gray-600: #80868B;
    --gray-700: #5F6368;
    --gray-800: #3C4043;
    --gray-900: #202124;
    
    /* Semantic Colors */
    --success: var(--google-green);
    --warning: var(--google-yellow);
    --error: var(--google-red);
    --info: var(--google-blue);
    --background: #FEFEFE;
    --surface: #FFFFFF;
    --text-primary: var(--gray-900);
    --text-secondary: var(--gray-700);
    --border: var(--gray-200);
}

/* ============================================
   Base Styles & Typography
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
    font-size: 15px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* ============================================
   Logo with Colored Letters
   ============================================ */
.logo {
    font-size: 3rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--gray-900);
}

.logo-switcher {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    max-width: 600px;
    aspect-ratio: 4 / 1;
    margin: 0 auto 20px;
    cursor: pointer;
    user-select: none;
    outline: none;
}

.logo-switcher:focus-visible {
    outline: 2px solid var(--google-blue);
    outline-offset: 4px;
    border-radius: 8px;
}

.logo-switcher img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    -webkit-user-drag: none;
    will-change: transform, opacity, filter;
}

.letter-blue { color: var(--google-blue); }
.letter-red { color: var(--google-red); }
.letter-yellow { color: var(--google-yellow); }
.letter-green { color: var(--google-green); }

/* ============================================
   Search Section
   ============================================ */
.search-section {
    text-align: center;
    padding: 60px 20px;
}

.pro-tip {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-top: 16px;
    margin-bottom: 0;
    opacity: 0.85;
}

.tagline {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-top: 8px;
    margin-bottom: 0;
}

.tagline-brand {
    font-weight: 700;
}

.tagline-sep {
    margin: 0 8px;
    color: var(--text-secondary);
    opacity: 0.6;
}

.search-bar {
    max-width: 600px;
    margin: 0 auto;
    display: flex;
    gap: 10px;
    box-shadow: 0 1px 6px rgba(32,33,36,0.28);
    border-radius: 24px;
    padding: 5px;
    background: var(--surface);
    border: 1px solid var(--border);
    transition: all 0.2s ease;
}

.search-bar:hover {
    box-shadow: 0 2px 8px rgba(32,33,36,0.28);
}

.search-bar:focus-within {
    box-shadow: 0 4px 12px rgba(32,33,36,0.28);
    border-color: transparent;
}

#urlInput {
    flex: 1;
    border: none;
    padding: 12px 20px;
    font-size: 16px;
    font-family: 'DM Sans', sans-serif;
    outline: none;
    border-radius: 24px;
    color: var(--text-primary);
}

#urlInput::placeholder {
    color: var(--gray-700);
}

#analyzeBtn {
    background: var(--google-blue);
    color: white;
    border: none;
    padding: 12px 30px;
    border-radius: 20px;
    font-size: 16px;
    font-weight: 500;
    font-family: 'DM Sans', sans-serif;
    cursor: pointer;
    transition: all 0.2s ease;
}

#analyzeBtn:hover {
    background: #3367D6;
}

#analyzeBtn:active {
    background: #2952A3;
    transform: scale(0.98);
}

#analyzeBtn:disabled {
    background: var(--gray-400);
    cursor: not-allowed;
}

/* ============================================
   Model Selector
   ============================================ */
.model-selector {
    max-width: 600px;
    margin: 16px auto 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
}

.model-label {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
}

.model-select {
    border: 1px solid var(--border);
    background: var(--surface);
    border-radius: 18px;
    padding: 8px 14px;
    font-family: 'DM Sans', sans-serif;
    font-size: 14px;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.2s ease;
    min-height: 36px;
}

.model-select:hover {
    border-color: var(--google-blue);
}

.model-select:focus {
    outline: none;
    border-color: var(--google-blue);
    box-shadow: 0 0 0 3px rgba(66, 133, 244, 0.15);
}

.model-hint {
    font-size: 12px;
    color: var(--gray-600);
    font-style: italic;
}

@media (max-width: 480px) {
    .model-hint {
        width: 100%;
        text-align: center;
    }
}

/* ============================================
   Loading Spinner
   ============================================ */
.loading-overlay {
    margin-top: 30px;
    text-align: center;
}

.spinner {
    width: 48px;
    height: 48px;
    margin: 0 auto 10px;
    border: 4px solid var(--gray-200);
    border-top-color: var(--google-blue);
    border-radius: 50%;
    animation: spin 1.4s cubic-bezier(0.4, 0, 0.2, 1) infinite, colorChange 5.6s linear infinite;
}

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

@keyframes colorChange {
    0%, 100% { border-top-color: var(--google-blue); }
    25% { border-top-color: var(--google-red); }
    50% { border-top-color: var(--google-yellow); }
    75% { border-top-color: var(--google-green); }
}

/* ============================================
   Error Messages
   ============================================ */
.error {
    max-width: 600px;
    margin: 20px auto;
    padding: 15px 20px;
    background: #FEE;
    border-left: 4px solid var(--error);
    border-radius: 4px;
    color: var(--error);
    font-weight: 500;
}

/* ============================================
   Results Container
   ============================================ */
.results-container {
    margin-top: 40px;
    animation: fadeIn 0.5s ease-out;
}

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

/* ============================================
   Tab Navigation
   ============================================ */
.tabs {
    display: flex;
    gap: 0;
    border-bottom: 1px solid var(--border);
    margin-bottom: 30px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.tab-btn {
    padding: 16px 24px;
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    font-family: 'DM Sans', sans-serif;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
    min-height: 44px;
}

.tab-btn:hover {
    background: var(--gray-50);
}

.tab-btn.active {
    color: var(--google-blue);
    border-bottom-color: var(--google-blue);
}

.pdf-btn {
    margin-left: auto;
    padding: 10px 20px;
    background: var(--google-red);
    color: white;
    border: none;
    border-radius: 6px;
    font-family: 'DM Sans', sans-serif;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.pdf-btn:hover {
    background: #C5221F;
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(234, 67, 53, 0.3);
}

.pdf-btn:active {
    transform: translateY(0);
}

.pdf-btn svg {
    width: 16px;
    height: 16px;
}

/* ============================================
   Card Sections
   ============================================ */
.card {
    background: var(--surface);
    border-radius: 8px;
    padding: 30px;
    margin-bottom: 20px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    transition: box-shadow 0.2s ease;
}

.card h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-primary);
    line-height: 1.2;
}

.section-description {
    color: var(--text-secondary);
    margin-bottom: 20px;
}

/* ============================================
   Circular Score Ring
   ============================================ */
.score-ring-container {
    position: relative;
    width: 200px;
    height: 200px;
    margin: 30px auto;
}

.score-ring {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.ring-background {
    fill: none;
    stroke: var(--gray-200);
    stroke-width: 12;
}

.ring-progress {
    fill: none;
    stroke: var(--google-green);
    stroke-width: 12;
    stroke-linecap: round;
    stroke-dasharray: 565.48;
    stroke-dashoffset: 565.48;
    transition: stroke-dashoffset 1.5s cubic-bezier(0.4, 0, 0.2, 1),
                stroke 0.3s ease;
}

.score-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
}

.score-number {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1;
    margin-bottom: 5px;
}

.score-label {
    font-size: 1rem;
    color: var(--text-secondary);
}

/* Score color classes */
.score-excellent { color: var(--google-green); }
.score-good { color: var(--google-yellow); }
.score-poor { color: var(--google-red); }
/* ============================================
   Content Freshness Display
   ============================================ */
.freshness-display {
    margin-top: 20px;
}

.freshness-status {
    padding: 20px;
    border-radius: 8px;
    border-left: 4px solid;
    background: var(--gray-50);
}

.freshness-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.freshness-icon {
    font-size: 1.5rem;
}

.freshness-label {
    font-size: 1.25rem;
    font-weight: 600;
}

.freshness-description {
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.freshness-details {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--gray-200);
}

.freshness-details p {
    margin-bottom: 8px;
    color: var(--text-secondary);
}

.freshness-details strong {
    color: var(--text-primary);
}

.freshness-stat {
    margin-top: 16px;
    padding: 12px;
    background: rgba(66, 133, 244, 0.08);
    border-radius: 6px;
    border-left: 3px solid var(--google-blue);
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.freshness-stat strong {
    color: var(--google-blue);
}

.freshness-description code {
    background: var(--gray-100);
    padding: 2px 6px;
    border-radius: 3px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9em;
    color: var(--google-blue);
}

/* Freshness status colors */
.freshness-fresh {
    border-left-color: var(--google-green);
    background: rgba(52, 168, 83, 0.05);
}

.freshness-fresh .freshness-label {
    color: var(--google-green);
}

.freshness-aging {
    border-left-color: var(--google-yellow);
    background: rgba(251, 188, 4, 0.05);
}

.freshness-aging .freshness-label {
    color: #F9AB00;
}

.freshness-stale {
    border-left-color: var(--google-red);
    background: rgba(234, 67, 53, 0.05);
}

.freshness-stale .freshness-label {
    color: var(--google-red);
}

.freshness-unknown {
    border-left-color: var(--gray-400);
    background: var(--gray-50);
}

.freshness-unknown .freshness-label {
    color: var(--gray-600);
}
/* ============================================
   llms.txt Detection Display
   ============================================ */
.llmstxt-display {
    margin-top: 20px;
}

.llmstxt-status {
    padding: 20px;
    border-radius: 8px;
    border-left: 4px solid;
    background: var(--gray-50);
}

.llmstxt-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.llmstxt-icon {
    font-size: 1.5rem;
}

.llmstxt-label {
    font-size: 1.25rem;
    font-weight: 600;
}

.llmstxt-description {
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.llmstxt-details {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--gray-200);
}

.llmstxt-details p {
    margin-bottom: 8px;
    color: var(--text-secondary);
}

.llmstxt-details strong {
    color: var(--text-primary);
}

.llmstxt-details a {
    color: var(--google-blue);
    text-decoration: none;
    word-break: break-all;
}

.llmstxt-details a:hover {
    text-decoration: underline;
}

.llmstxt-info {
    margin-top: 16px;
    padding: 12px;
    background: rgba(66, 133, 244, 0.08);
    border-radius: 6px;
    border-left: 3px solid var(--google-blue);
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.llmstxt-info strong {
    color: var(--google-blue);
}

/* llms.txt status colors */
.llmstxt-present {
    border-left-color: var(--google-green);
    background: rgba(52, 168, 83, 0.05);
}

.llmstxt-present .llmstxt-label {
    color: var(--google-green);
}

.llmstxt-missing {
    border-left-color: var(--google-red);
    background: rgba(234, 67, 53, 0.05);
}

.llmstxt-missing .llmstxt-label {
    color: var(--google-red);
}



/* ============================================
   GEO Rules with Progress Bars
   ============================================ */
.rule-results {
    margin-top: 30px;
}

.rule-item {
    margin-bottom: 20px;
    padding: 16px;
    border-radius: 8px;
    background: var(--gray-50);
    transition: all 0.2s ease;
}

.rule-item:hover {
    transform: scale(1.02);
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.rule-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.rule-name {
    font-weight: 500;
    font-size: 14px;
    color: var(--text-primary);
    text-transform: capitalize;
}

.rule-score {
    font-weight: 600;
    font-size: 14px;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--gray-200);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 8px;
}

.progress-fill {
    height: 100%;
    border-radius: 4px;
    transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
    width: 0;
}

.rule-message {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* Progress bar colors */
.progress-excellent { background: var(--google-green); }
.progress-good { background: var(--google-yellow); }
.progress-poor { background: var(--google-red); }

/* ============================================
   Schema Inventory
   ============================================ */
.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: 16px;
    font-weight: 500;
    font-size: 14px;
    margin-bottom: 20px;
}

.status-badge::before {
    content: '';
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.status-none {
    background: #FEE;
    color: var(--google-red);
}

.status-none::before {
    background: var(--google-red);
}

.status-some {
    background: #FFF4E5;
    color: #F57C00;
}

.status-some::before {
    background: var(--google-yellow);
}

.status-multiple {
    background: #E8F5E9;
    color: var(--google-green);
}

.status-multiple::before {
    background: var(--google-green);
}

.schema-types {
    margin-bottom: 15px;
}

.schema-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    margin-bottom: 8px;
    border-radius: 4px;
    background: var(--gray-50);
    font-size: 14px;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

.status-dot.green { background: var(--google-green); }
.status-dot.yellow { background: var(--google-yellow); }
.status-dot.gray { background: var(--gray-400); }

.schema-item.missing {
    opacity: 0.6;
}

.toggle-btn {
    background: none;
    border: none;
    color: var(--google-blue);
    font-family: 'DM Sans', sans-serif;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    padding: 8px 0;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: all 0.2s ease;
}

.toggle-btn:hover {
    text-decoration: underline;
}

.toggle-icon {
    transition: transform 0.3s ease;
}

.toggle-btn.expanded .toggle-icon {
    transform: rotate(180deg);
}

/* ============================================
   Actionable Issues
   ============================================ */
.issues-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.issue-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 20px;
    transition: all 0.2s ease;
}

.issue-card:hover {
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.issue-header {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 10px;
}

.severity-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    flex-shrink: 0;
    margin-top: 4px;
}

.severity-high { background: var(--google-red); }
.severity-medium { background: var(--google-yellow); }
.severity-low { background: var(--gray-600); }

.issue-title {
    font-weight: 600;
    font-size: 16px;
    color: var(--text-primary);
    line-height: 1.4;
}

.issue-description {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.6;
    margin-left: 24px;
}

/* ============================================
   Numbered Recommendations
   ============================================ */
.recommendations-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.recommendation-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    padding: 16px;
    border-radius: 8px;
    transition: background 0.2s ease;
}

.recommendation-item:hover {
    background: var(--gray-50);
}

.rec-number {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--google-blue);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 16px;
    flex-shrink: 0;
}

.rec-text {
    flex: 1;
    font-size: 15px;
    color: var(--text-primary);
    line-height: 1.6;
}

/* ============================================
   JSON Comparison
   ============================================ */
.comparison-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    align-items: start;
}

.json-panel {
    display: flex;
    flex-direction: column;
    min-width: 0;
    overflow: hidden;
}

.json-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.json-panel h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.json-code {
    background: var(--gray-50);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 20px;
    overflow-x: auto;
    overflow-y: auto;
    max-height: 500px;
    font-family: 'JetBrains Mono', 'Courier New', monospace;
    font-size: 13px;
    line-height: 1.5;
    color: var(--text-primary);
}

.copy-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 8px 12px;
    font-family: 'DM Sans', sans-serif;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.2s ease;
}

.copy-btn:hover {
    background: var(--google-blue);
    color: white;
    border-color: var(--google-blue);
}

.copy-btn svg {
    width: 16px;
    height: 16px;
}

.copy-btn.copied {
    background: var(--google-green);
    color: white;
    border-color: var(--google-green);
}

/* JSON Syntax Highlighting */
.json-key { color: #1967D2; }
.json-string { color: #137333; }
.json-number { color: #C5221F; }
.json-boolean { color: #9334E6; }
.json-null { color: var(--gray-600); }

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 1023px) {
    .container {
        max-width: 900px;
    }
    
    .score-ring-container {
        width: 175px;
        height: 175px;
    }
    
    .score-number {
        font-size: 3rem;
    }
}

@media (max-width: 767px) {
    .logo {
        font-size: 2rem;
    }
    
    .search-section {
        padding: 40px 20px;
    }
    
    .search-bar {
        flex-direction: column;
        gap: 8px;
    }
    
    #analyzeBtn {
        width: 100%;
    }
    
    .tabs {
        gap: 0;
        justify-content: flex-start;
        flex-wrap: wrap;
    }
    
    .tab-btn {
        padding: 12px 16px;
        font-size: 13px;
    }
    
    .pdf-btn {
        margin-left: 0;
        width: 100%;
        justify-content: center;
        margin-top: 8px;
    }
    
    .card {
        padding: 20px;
    }
    
    .card h2 {
        font-size: 1.25rem;
    }
    
    .score-ring-container {
        width: 150px;
        height: 150px;
    }
    
    .score-number {
        font-size: 2.5rem;
    }
    
    .score-label {
        font-size: 0.9rem;
    }
    
    .comparison-grid {
        grid-template-columns: 1fr;
    }
    
    .json-code {
        font-size: 12px;
    }
    
    .recommendation-item {
        gap: 12px;
    }
    
    .rec-number {
        width: 28px;
        height: 28px;
        font-size: 14px;
    }
}

/* ============================================
   Accessibility - Reduced Motion
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}

/* ============================================
   Section Visibility Control
   ============================================ */
[data-section] {
    display: block;
}

[data-section].hidden {
    display: none;
}