:root {
    --bg-primary: #0a0a0b;
    --bg-secondary: #111113;
    --bg-card: #161618;
    --bg-card-hover: #1a1a1d;
    --border: #27272a;
    --border-hover: #3f3f46;
    --text-primary: #fafafa;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;
    --accent: #22c55e;
    --accent-dim: #16a34a;
    --accent-glow: rgba(34, 197, 94, 0.15);
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #3b82f6;
}

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

body { 
    font-family: 'Outfit', -apple-system, sans-serif; 
    background: var(--bg-primary); 
    color: var(--text-primary); 
    min-height: 100vh; 
    line-height: 1.6; 
}

/* Header */
header { 
    border-bottom: 1px solid var(--border); 
    padding: 1rem 2rem; 
    position: sticky; 
    top: 0; 
    background: rgba(10, 10, 11, 0.95); 
    backdrop-filter: blur(12px); 
    z-index: 100; 
}

.header-content { 
    max-width: 1400px; 
    margin: 0 auto; 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
}

.logo { 
    display: flex; 
    align-items: center; 
    gap: 0.75rem; 
    text-decoration: none; 
    color: var(--text-primary); 
}

.logo-icon { 
    width: 36px; 
    height: 36px; 
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dim) 100%); 
    border-radius: 8px; 
    display: flex; 
    align-items: center; 
    justify-content: center; 
    font-weight: 700; 
    font-size: 1.1rem; 
}

.logo-text { 
    font-size: 1.25rem; 
    font-weight: 600; 
    letter-spacing: -0.02em; 
}

.logo-text span { color: var(--accent); }

.header-nav {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.header-nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.2s;
}

.header-nav a:hover {
    color: var(--accent);
}

@media (max-width: 768px) {
    .header-nav { display: none; }
}

/* Main Layout */
main { 
    max-width: 1200px; 
    margin: 0 auto; 
    padding: 2rem; 
}

@media (max-width: 768px) {
    main { padding: 1rem; }
}

/* Tool Container */
.tool-container { 
    background: var(--bg-card); 
    border: 1px solid var(--border); 
    border-radius: 12px; 
    overflow: hidden; 
}

.tool-header { 
    padding: 2rem; 
    border-bottom: 1px solid var(--border); 
}

.tool-title { 
    font-size: 2rem; 
    font-weight: 700; 
    letter-spacing: -0.02em; 
    margin-bottom: 0.5rem; 
}

.tool-description { 
    color: var(--text-muted); 
    font-size: 1.1rem; 
    max-width: 600px;
}

.tool-content { padding: 2rem; }

/* Form Elements */
.form-group { margin-bottom: 1.5rem; }

.form-label { 
    display: block; 
    font-size: 0.875rem; 
    font-weight: 500; 
    color: var(--text-secondary); 
    margin-bottom: 0.5rem; 
}

.form-input, .form-textarea, .form-select { 
    width: 100%; 
    padding: 0.75rem 1rem; 
    background: var(--bg-secondary); 
    border: 1px solid var(--border); 
    border-radius: 8px; 
    color: var(--text-primary); 
    font-family: 'JetBrains Mono', monospace; 
    font-size: 0.9rem; 
    transition: all 0.2s ease; 
}

.form-input:focus, .form-textarea:focus, .form-select:focus { 
    outline: none; 
    border-color: var(--accent); 
    box-shadow: 0 0 0 3px var(--accent-glow); 
}

.form-textarea { min-height: 150px; resize: vertical; }

.form-row { 
    display: grid; 
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); 
    gap: 1rem; 
}

/* Checkbox & Range */
.checkbox-group { display: flex; flex-wrap: wrap; gap: 1rem; }

.checkbox-label { 
    display: flex; 
    align-items: center; 
    gap: 0.5rem; 
    cursor: pointer; 
    color: var(--text-secondary); 
    font-size: 0.9rem; 
}

.checkbox-label input[type="checkbox"] { 
    width: 18px; 
    height: 18px; 
    accent-color: var(--accent); 
    cursor: pointer; 
}

.range-container { display: flex; align-items: center; gap: 1rem; }

.range-input { 
    flex: 1; 
    height: 6px; 
    appearance: none; 
    background: var(--border); 
    border-radius: 3px; 
    cursor: pointer; 
}

.range-input::-webkit-slider-thumb { 
    appearance: none; 
    width: 18px; 
    height: 18px; 
    background: var(--accent); 
    border-radius: 50%; 
    cursor: pointer; 
}

.range-value { 
    font-family: 'JetBrains Mono', monospace; 
    font-size: 0.9rem; 
    color: var(--accent); 
    min-width: 3ch; 
    text-align: center; 
}

/* Output Box */
.output-box { 
    background: var(--bg-secondary); 
    border: 1px solid var(--border); 
    border-radius: 8px; 
    padding: 1rem; 
    margin-top: 1rem; 
}

.output-label { 
    font-size: 0.75rem; 
    text-transform: uppercase; 
    letter-spacing: 0.05em; 
    color: var(--text-muted); 
    margin-bottom: 0.5rem; 
}

.output-value { 
    font-family: 'JetBrains Mono', monospace; 
    font-size: 1.1rem; 
    word-break: break-all; 
    color: var(--accent); 
    line-height: 1.8; 
    white-space: pre-wrap; 
}

.output-value.text-white { color: var(--text-primary); }

/* Buttons */
.btn { 
    display: inline-flex; 
    align-items: center; 
    justify-content: center; 
    gap: 0.5rem; 
    padding: 0.75rem 1.5rem; 
    border-radius: 8px; 
    font-family: 'Outfit', sans-serif; 
    font-size: 0.95rem; 
    font-weight: 500; 
    cursor: pointer; 
    transition: all 0.2s ease; 
    border: none; 
}

.btn-primary { background: var(--accent); color: #000; }
.btn-primary:hover { background: var(--accent-dim); }

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

.btn-group { display: flex; gap: 0.75rem; margin-top: 1.5rem; flex-wrap: wrap; }

/* Strength Bar */
.strength-bar { height: 4px; background: var(--border); border-radius: 2px; margin-top: 0.75rem; overflow: hidden; }
.strength-fill { height: 100%; border-radius: 2px; transition: all 0.3s ease; }
.strength-text { font-size: 0.8rem; margin-top: 0.5rem; color: var(--text-muted); }

/* Subnet Results */
.subnet-results { 
    display: grid; 
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); 
    gap: 1rem; 
    margin-top: 1.5rem; 
}

.subnet-card { 
    background: var(--bg-secondary); 
    border: 1px solid var(--border); 
    border-radius: 8px; 
    padding: 1rem; 
}

.subnet-card-label { 
    font-size: 0.75rem; 
    text-transform: uppercase; 
    letter-spacing: 0.05em; 
    color: var(--text-muted); 
    margin-bottom: 0.25rem; 
}

.subnet-card-value { 
    font-family: 'JetBrains Mono', monospace; 
    font-size: 0.95rem; 
    color: var(--text-primary); 
}

/* Hash Results */
.hash-results { margin-top: 1.5rem; }

.hash-item { 
    background: var(--bg-secondary); 
    border: 1px solid var(--border); 
    border-radius: 8px; 
    padding: 1rem; 
    margin-bottom: 0.75rem; 
}

.hash-type { 
    font-size: 0.75rem; 
    text-transform: uppercase; 
    letter-spacing: 0.05em; 
    color: var(--accent); 
    margin-bottom: 0.25rem; 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
}

.hash-value { 
    font-family: 'JetBrains Mono', monospace; 
    font-size: 0.85rem; 
    color: var(--text-primary); 
    word-break: break-all; 
}

.copy-btn { 
    background: none; 
    border: none; 
    color: var(--text-muted); 
    cursor: pointer; 
    padding: 0.25rem; 
    border-radius: 4px; 
    transition: all 0.2s ease; 
}
.copy-btn:hover { color: var(--accent); background: var(--accent-glow); }

/* Format Options */
.format-options { 
    display: grid; 
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); 
    gap: 0.5rem; 
    margin-top: 1rem; 
}

.format-btn { 
    padding: 0.5rem 0.75rem; 
    background: var(--bg-secondary); 
    border: 1px solid var(--border); 
    border-radius: 6px; 
    color: var(--text-secondary); 
    font-family: 'JetBrains Mono', monospace; 
    font-size: 0.8rem; 
    cursor: pointer; 
    transition: all 0.2s ease; 
}
.format-btn:hover { background: var(--accent-glow); border-color: var(--accent); color: var(--accent); }

/* Bulk Output */
.bulk-output { 
    background: var(--bg-secondary); 
    border: 1px solid var(--border); 
    border-radius: 8px; 
    padding: 1rem; 
    margin-top: 1rem; 
    max-height: 300px; 
    overflow-y: auto; 
}

.bulk-output pre { 
    font-family: 'JetBrains Mono', monospace; 
    font-size: 0.85rem; 
    color: var(--text-primary); 
    white-space: pre-wrap; 
    word-break: break-all; 
}

/* Toast */
.toast { 
    position: fixed; 
    bottom: 2rem; 
    right: 2rem; 
    background: var(--bg-card); 
    border: 1px solid var(--accent); 
    color: var(--text-primary); 
    padding: 1rem 1.5rem; 
    border-radius: 8px; 
    font-size: 0.9rem; 
    opacity: 0; 
    transform: translateY(20px); 
    transition: all 0.3s ease; 
    z-index: 1000; 
}
.toast.show { opacity: 1; transform: translateY(0); }

/* Footer */
footer { 
    border-top: 1px solid var(--border); 
    padding: 3rem 2rem; 
    margin-top: 4rem; 
    background: var(--bg-secondary);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.footer-section h3 {
    color: var(--text-primary);
    font-size: 1rem;
    margin-bottom: 1rem;
}

.footer-section a {
    display: block;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    padding: 0.25rem 0;
    transition: color 0.2s;
}

.footer-section a:hover {
    color: var(--accent);
}

.footer-bottom {
    max-width: 1200px;
    margin: 2rem auto 0;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* SEO Content Section */
.seo-content {
    margin-top: 3rem;
    padding: 2rem;
    background: var(--bg-secondary);
    border-radius: 12px;
    border: 1px solid var(--border);
}

.seo-content h2 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.seo-content h3 {
    font-size: 1.1rem;
    margin: 1.5rem 0 0.75rem;
    color: var(--text-primary);
}

.seo-content p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.7;
}

.seo-content ul {
    color: var(--text-secondary);
    margin-left: 1.5rem;
    margin-bottom: 1rem;
}

.seo-content li {
    margin-bottom: 0.5rem;
}

/* Related Tools */
.related-tools {
    margin-top: 3rem;
}

.related-tools h2 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

.related-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.25rem;
    text-decoration: none;
    transition: all 0.2s;
}

.related-card:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
}

.related-card h3 {
    color: var(--text-primary);
    font-size: 1rem;
    margin-bottom: 0.5rem;
}

.related-card p {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* Homepage Styles */
.hero {
    text-align: center;
    padding: 4rem 2rem;
}

.hero h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.hero h1 span {
    color: var(--accent);
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-top: 3rem;
}

.tool-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem;
    text-decoration: none;
    transition: all 0.2s;
}

.tool-card:hover {
    border-color: var(--accent);
    transform: translateY(-3px);
    box-shadow: 0 10px 40px rgba(0,0,0,0.3);
}

.tool-card-icon {
    width: 48px;
    height: 48px;
    background: var(--accent-glow);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
}

.tool-card-icon svg {
    width: 24px;
    height: 24px;
    stroke: var(--accent);
}

.tool-card h2 {
    color: var(--text-primary);
    font-size: 1.15rem;
    margin-bottom: 0.5rem;
}

.tool-card p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Breadcrumb */
.breadcrumb {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
}

.breadcrumb a {
    color: var(--text-muted);
    text-decoration: none;
}

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

.breadcrumb span {
    color: var(--text-muted);
}

.breadcrumb-current {
    color: var(--text-secondary);
}