/* ===== CSS Variables & Reset ===== */
:root {
    --bg-primary: #0f1117;
    --bg-secondary: #1a1d2e;
    --bg-card: #1e2235;
    --bg-input: #252a3a;
    --text-primary: #e4e6f0;
    --text-secondary: #8b8fa3;
    --accent: #6c63ff;
    --accent-hover: #5a52e0;
    --accent-glow: rgba(108, 99, 255, 0.15);
    --success: #4ade80;
    --error: #f87171;
    --warning: #fbbf24;
    --border: #2a2f42;
    --radius: 12px;
    --radius-sm: 8px;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    --shadow: 0 4px 24px rgba(0,0,0,0.3);
    --transition: 0.2s ease;
}

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

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== Navbar ===== */
.navbar {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    padding: 16px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(12px);
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary) !important;
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo-icon {
    font-size: 1.6rem;
    color: var(--accent);
}

.nav-links { display: flex; gap: 24px; }
.nav-links a {
    color: var(--text-secondary);
    font-weight: 500;
    transition: color var(--transition);
}
.nav-links a:hover, .nav-links a.active { color: var(--text-primary); }

/* ===== Hero ===== */
.hero {
    text-align: center;
    padding: 64px 0 40px;
}

.hero h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 12px;
    background: linear-gradient(135deg, var(--text-primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    color: var(--text-secondary);
    font-size: 1.15rem;
    max-width: 600px;
    margin: 0 auto 32px;
}

.search-box {
    max-width: 480px;
    margin: 0 auto;
}

.search-box input {
    width: 100%;
    padding: 14px 20px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 50px;
    color: var(--text-primary);
    font-size: 1rem;
    font-family: var(--font-sans);
    outline: none;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.search-box input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.search-box input::placeholder { color: var(--text-secondary); }

/* ===== Tools Grid ===== */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
    padding: 20px 0 60px;
}

.tool-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px 24px;
    color: var(--text-primary) !important;
    transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
    display: block;
    position: relative;
}

.tool-card:hover {
    transform: translateY(-3px);
    border-color: var(--accent);
    box-shadow: 0 8px 32px rgba(108, 99, 255, 0.12);
}

.tool-icon {
    font-size: 1.8rem;
    font-weight: 700;
    font-family: var(--font-mono);
    color: var(--accent);
    margin-bottom: 14px;
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-glow);
    border-radius: var(--radius-sm);
}

.tool-card h2 {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.tool-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
}

.tool-tag {
    position: absolute;
    top: 14px;
    right: 14px;
    background: var(--accent);
    color: white;
    font-size: 0.7rem;
    font-weight: 600;
    padding: 3px 10px;
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ===== Tool Page Layout ===== */
.tool-header {
    padding: 40px 0 20px;
}

.tool-header h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.tool-header p {
    color: var(--text-secondary);
    font-size: 1.05rem;
}

.breadcrumb {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-bottom: 12px;
}

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

.tool-container {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    margin-bottom: 24px;
}

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

@media (max-width: 768px) {
    .tool-row { grid-template-columns: 1fr; }
    .hero h1 { font-size: 1.8rem; }
}

.tool-col label {
    display: block;
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 10px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

textarea, input[type="text"], select {
    width: 100%;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    padding: 14px;
    outline: none;
    transition: border-color var(--transition);
    resize: vertical;
}

textarea:focus, input[type="text"]:focus, select:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

textarea { min-height: 200px; }

/* ===== Buttons ===== */
.btn-row {
    display: flex;
    gap: 12px;
    margin: 16px 0;
    flex-wrap: wrap;
}

.btn {
    padding: 10px 22px;
    border: none;
    border-radius: var(--radius-sm);
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-primary {
    background: var(--accent);
    color: white;
}
.btn-primary:hover { background: var(--accent-hover); }

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

.btn-success {
    background: var(--success);
    color: #111;
}

.btn-small {
    padding: 6px 14px;
    font-size: 0.8rem;
}

/* ===== Status Messages ===== */
.status {
    padding: 10px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    margin-top: 12px;
    display: none;
}

.status.show { display: block; }
.status.success { background: rgba(74, 222, 128, 0.1); color: var(--success); border: 1px solid rgba(74, 222, 128, 0.2); }
.status.error { background: rgba(248, 113, 113, 0.1); color: var(--error); border: 1px solid rgba(248, 113, 113, 0.2); }

/* ===== Output Display ===== */
.output-box {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 14px;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    white-space: pre-wrap;
    word-break: break-all;
    min-height: 100px;
    max-height: 400px;
    overflow-y: auto;
}

/* ===== Checkbox & Options ===== */
.option-row {
    display: flex;
    align-items: center;
    gap: 16px;
    margin: 12px 0;
    flex-wrap: wrap;
}

.option-row label {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    cursor: pointer;
    text-transform: none;
    letter-spacing: 0;
    font-weight: 400;
    margin-bottom: 0;
}

.option-row select {
    width: auto;
    padding: 6px 12px;
}

/* ===== Footer ===== */
.footer {
    text-align: center;
    padding: 40px 0;
    border-top: 1px solid var(--border);
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.footer-sub { font-size: 0.75rem; margin-top: 6px; }

/* ===== SEO Info Section ===== */
.info-section {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    margin: 20px 0 40px;
}

.info-section h2 {
    font-size: 1.3rem;
    margin-bottom: 16px;
}

.info-section h3 {
    font-size: 1.05rem;
    margin: 20px 0 8px;
    color: var(--accent);
}

.info-section p, .info-section li {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.7;
}

.info-section ul {
    padding-left: 20px;
    margin: 8px 0;
}

/* ===== Diff specific ===== */
.diff-output {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    line-height: 1.6;
}

.diff-added { background: rgba(74, 222, 128, 0.1); color: var(--success); }
.diff-removed { background: rgba(248, 113, 113, 0.1); color: var(--error); }
.diff-header { color: var(--accent); font-weight: 600; }

/* ===== Color preview ===== */
.color-preview {
    width: 100%;
    height: 80px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    margin: 12px 0;
}

/* ===== Regex matches ===== */
.match-highlight {
    background: rgba(108, 99, 255, 0.3);
    border-radius: 3px;
    padding: 1px 2px;
}

/* ===== JWT sections ===== */
.jwt-section {
    margin: 12px 0;
}

.jwt-section-label {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 6px;
}

/* ===== Ad Placeholder ===== */
.ad-space {
    background: var(--bg-secondary);
    border: 1px dashed var(--border);
    border-radius: var(--radius-sm);
    padding: 20px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.8rem;
    margin: 20px 0;
    min-height: 90px;
    display: flex;
    align-items: center;
    justify-content: center;
}