/* 
   TEXT COMPARE - EXPERT WEB TOOLS
   Theme: 2025 Glassmorphism - RESPONSIVE FIX
*/

@font-face { font-family: 'Inter'; src: url('/fonts/inter-v20-latin-regular.woff2') format('woff2'); font-weight: 400; font-display: swap; }
@font-face { font-family: 'Orbitron'; src: url('/fonts/orbitron-v35-latin-700.woff2') format('woff2'); font-weight: 700; font-display: swap; }
@font-face { font-family: 'Roboto Mono'; src: url('/fonts/roboto-mono-v31-latin-regular.woff2') format('woff2'); font-weight: 400; font-display: swap; }

:root {
    --bg-dark: #0a0a0f;
    --primary-accent: #3b82f6;
    --secondary-accent: #8b5cf6;
    --text-main: #ffffff;
    --text-muted: #94a3b8;
    --card-bg: rgba(25, 25, 35, 0.6);
    --card-border: rgba(255, 255, 255, 0.08);
    --input-bg: rgba(255, 255, 255, 0.05);
    
    /* Diff Colors */
    --ins-bg: rgba(16, 185, 129, 0.15);
    --del-bg: rgba(239, 68, 68, 0.15);
    --ins-text: #6ee7b7;
    --del-text: #fca5a5;
    
    --font-heading: 'Orbitron', sans-serif;
    --font-body: 'Inter', sans-serif;
    --font-code: 'Roboto Mono', monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: var(--font-body);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.background-glow {
    position: fixed; top: -50%; left: -50%; width: 200%; height: 200%;
    background: radial-gradient(circle at center, rgba(59, 130, 246, 0.08) 0%, rgba(10, 10, 15, 0) 50%);
    z-index: -1; pointer-events: none;
}

/* --- Header --- */
.tool-header {
    display: flex; justify-content: space-between; align-items: center;
    padding: 1.5rem 5%; max-width: 1400px; margin: 0 auto; width: 100%;
}
.back-btn {
    color: var(--text-muted); text-decoration: none; display: flex; align-items: center; gap: 8px; transition: color 0.3s;
}
.back-btn:hover { color: var(--primary-accent); }
.logo { font-family: var(--font-heading); font-size: 1.2rem; }
.logo span { color: var(--primary-accent); }

/* --- Main Layout --- */
.main-content {
    flex-grow: 1; padding: 2rem 5%; max-width: 1400px; margin: 0 auto; width: 100%;
}

.tool-container {
    background: var(--card-bg); border: 1px solid var(--card-border);
    border-radius: 16px; padding: 2rem; backdrop-filter: blur(10px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.tool-intro { text-align: center; margin-bottom: 2rem; }
.tool-intro h1 { font-family: var(--font-heading); margin-bottom: 0.5rem; font-size: 2rem; line-height: 1.2; }
.tool-intro p { color: var(--text-muted); }

/* Toolbar */
.toolbar {
    display: flex; justify-content: space-between; align-items: center;
    margin-bottom: 1.5rem; padding-bottom: 1rem; border-bottom: 1px solid var(--card-border);
    flex-wrap: wrap; gap: 1rem;
}

.control-group label { margin-right: 10px; color: var(--text-muted); }

/* Select Dropdown */
select {
    background-color: var(--input-bg);
    border: 1px solid var(--card-border);
    color: #fff;
    padding: 8px 12px;
    border-radius: 6px;
    outline: none;
    cursor: pointer;
    font-family: var(--font-body);
    font-size: 0.9rem;
}
select option { background-color: var(--bg-dark); color: #fff; padding: 10px; }

/* Buttons */
.action-group { display: flex; gap: 10px; }

button {
    border: 1px solid var(--card-border); border-radius: 6px; padding: 10px 20px;
    cursor: pointer; font-weight: 600; font-size: 0.9rem; transition: all 0.2s;
    display: flex; align-items: center; justify-content: center; gap: 8px;
    font-family: var(--font-body); white-space: nowrap;
}

.primary-btn { background: var(--primary-accent); color: #fff; border-color: var(--primary-accent); }
.primary-btn:hover { background: #2563eb; }

.secondary-btn { background: transparent; color: var(--text-muted); }
.secondary-btn:hover { background: rgba(255,255,255,0.05); color: #fff; }

.danger-btn { background: transparent; color: #ef4444; border-color: rgba(239,68,68,0.3); }
.danger-btn:hover { background: rgba(239,68,68,0.1); }

/* Input Grid */
.io-grid {
    display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; margin-bottom: 2rem;
}

.io-column { display: flex; flex-direction: column; gap: 10px; }

.column-header { display: flex; justify-content: space-between; align-items: center; }
.column-header h3 { font-size: 1rem; color: var(--text-muted); font-family: var(--font-heading); }

.file-upload {
    cursor: pointer; font-size: 0.85rem; color: var(--primary-accent);
    display: flex; align-items: center; gap: 5px;
}
.file-upload:hover { text-decoration: underline; }

textarea {
    width: 100%; min-height: 300px; background: var(--input-bg);
    border: 1px solid var(--card-border); border-radius: 8px; padding: 1rem;
    color: #fff; font-family: var(--font-code); font-size: 0.9rem;
    resize: vertical; outline: none;
}
textarea:focus { border-color: var(--primary-accent); }
textarea.drag-over { border-color: var(--primary-accent); background: rgba(59, 130, 246, 0.1); }

/* Results Section */
.results-card {
    background: rgba(0,0,0,0.2); border: 1px solid var(--card-border);
    border-radius: 12px; padding: 1.5rem; margin-top: 2rem;
}

.results-header {
    display: flex; justify-content: space-between; align-items: center;
    margin-bottom: 1.5rem; border-bottom: 1px solid var(--card-border);
    padding-bottom: 10px; flex-wrap: wrap; gap: 10px;
}
.results-header h3 { font-family: var(--font-heading); font-size: 1.1rem; margin: 0; }

.diff-stats { font-family: var(--font-code); font-size: 0.9rem; color: var(--text-muted); }
.stat-add { color: #10b981; }
.stat-del { color: #ef4444; }

.view-toggle { background: rgba(0,0,0,0.3); padding: 4px; border-radius: 8px; display: inline-flex; }
.toggle-btn {
    background: transparent; border: none; color: var(--text-muted);
    padding: 6px 16px; border-radius: 6px; cursor: pointer; font-size: 0.85rem;
}
.toggle-btn.active { background: var(--primary-accent); color: #fff; }

/* Diff Views */
#inline-output {
    font-family: var(--font-code); white-space: pre-wrap;
    line-height: 1.5; color: #cbd5e1; font-size: 0.9rem;
    overflow-x: auto;
}

#side-by-side-output {
    display: grid; grid-template-columns: 1fr 1fr; gap: 1rem;
    border-top: 1px solid var(--card-border);
}

.diff-pane { display: flex; gap: 10px; overflow-x: auto; padding-top: 1rem; }

.line-numbers {
    color: var(--text-muted); text-align: right; padding-right: 10px;
    user-select: none; border-right: 1px solid var(--card-border);
    font-family: var(--font-code); font-size: 0.9rem; line-height: 1.5;
}

.diff-content {
    font-family: var(--font-code); white-space: pre; line-height: 1.5;
    color: #cbd5e1; font-size: 0.9rem; width: 100%;
}

/* Diff Highlighting */
ins { text-decoration: none; background: var(--ins-bg); display: block; }
del { text-decoration: none; background: var(--del-bg); display: block; }

ins span { color: var(--ins-text); font-weight: bold; background: rgba(16, 185, 129, 0.2); }
del span { color: var(--del-text); font-weight: bold; background: rgba(239, 68, 68, 0.2); }

.diff-placeholder { background: rgba(255,255,255,0.05); display: block; }

/* Toast */
.toast {
    position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%);
    background: #1e1e24; border: 1px solid var(--primary-accent);
    color: #fff; padding: 10px 20px; border-radius: 8px; z-index: 2000;
}

.hidden { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border-width: 0; }

/* Info & FAQ Section */
.info-section { margin-top: 4rem; padding: 0 1rem; }
.info-section h2 { font-family: var(--font-heading); color: var(--text-main); margin-bottom: 2rem; font-size: 1.5rem; text-align: center; }

.info-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 2rem; margin-bottom: 2rem; }
.info-grid h3 { color: var(--primary-accent); font-family: var(--font-heading); font-size: 1.1rem; margin-bottom: 0.5rem; }
.info-grid i { margin-right: 8px; }
.info-grid p { color: var(--text-muted); font-size: 0.95rem; line-height: 1.6; }

.faq-container { margin-top: 2rem; }
.faq-container h3 { font-family: var(--font-heading); color: var(--text-main); margin: 1.5rem 0 1rem; }
.faq-container h4 { color: var(--secondary-accent); font-size: 1rem; margin-bottom: 0.5rem; margin-top: 1.5rem; }
.faq-container p { color: var(--text-muted); font-size: 0.95rem; margin-bottom: 1rem; line-height: 1.6; }

footer { text-align: center; padding: 3rem 0; color: var(--text-muted); font-size: 0.9rem; border-top: 1px solid var(--card-border); margin-top: 3rem; }
footer a { color: #fff; text-decoration: none; }


/* --- MEDIA QUERIES (RESPONSIVENESS) --- */

/* Tablet & Mobile Layout */
@media (max-width: 900px) {
    .io-grid { grid-template-columns: 1fr; }
    textarea { min-height: 200px; }
    #side-by-side-output { grid-template-columns: 1fr; } /* Stack diffs vertically */
    .info-grid { grid-template-columns: 1fr; }
}

/* Mobile Portrait Specifics (Fixes "Compare" button overflow) */
@media (max-width: 600px) {
    .tool-header { padding: 1rem; }
    .main-content { padding: 1rem; }
    .tool-container { padding: 1.5rem 1rem; }
    
    .toolbar { 
        flex-direction: column; 
        align-items: flex-start; 
        gap: 15px; 
    }
    
    .control-group, .action-group {
        width: 100%;
    }
    
    select { width: 100%; }

    /* Button Grid for Mobile: Sample/Clear on top row, Compare full width below */
    .action-group {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 10px;
    }

    #loadSampleBtn { grid-column: 1; }
    #clearBtn { grid-column: 2; }
    #compareBtn { grid-column: 1 / -1; /* Spans full width */ }

    /* Fix Results Header */
    .results-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
    
    .view-toggle {
        width: 100%;
        display: grid;
        grid-template-columns: 1fr 1fr;
    }
    
    .toggle-btn { width: 100%; text-align: center; }
}