/* ==========================================================================
   TCPIQ.com - Minimalist Network Tools Stylesheet
   ========================================================================== */

/* CSS Variables - Tech-oriented color scheme */
:root {
    --color-bg: #f8fafc;
    --color-surface: #ffffff;
    --color-surface-alt: #f1f5f9;
    --color-primary: #0ea5e9;
    --color-primary-dark: #0284c7;
    --color-primary-light: #38bdf8;
    --color-secondary: #06b6d4;
    --color-accent: #14b8a6;
    --color-text: #1e293b;
    --color-text-muted: #64748b;
    --color-text-light: #94a3b8;
    --color-border: #e2e8f0;
    --color-success: #22c55e;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    --color-sale: #dc2626;
    --color-sale-dark: #b91c1c;
    
    --font-sans: 'Segoe UI', system-ui, -apple-system, sans-serif;
    --font-mono: 'Cascadia Code', 'Fira Code', 'Consolas', monospace;
    
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    
    --radius-sm: 6px;
    --radius: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    --transition: 0.2s ease;
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Background Pattern */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 20%, rgba(14, 165, 233, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(6, 182, 212, 0.03) 0%, transparent 50%),
        linear-gradient(135deg, rgba(14, 165, 233, 0.02) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--color-text);
}

h1 { font-size: 2.25rem; }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.25rem; }

p {
    margin-bottom: 1rem;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition);
}

a:hover {
    color: var(--color-primary-dark);
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Header */
.header {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
    text-decoration: none;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
}

.logo span {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Navigation */
.nav {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-link {
    padding: 0.5rem 1rem;
    color: var(--color-text-muted);
    font-weight: 500;
    border-radius: var(--radius);
    transition: all var(--transition);
}

.nav-link:hover {
    color: var(--color-primary);
    background: var(--color-surface-alt);
}

.nav-link.active {
    color: var(--color-primary);
    background: rgba(14, 165, 233, 0.1);
}

/* Mobile Menu */
.mobile-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    color: var(--color-text);
}

.mobile-toggle svg {
    width: 24px;
    height: 24px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--radius);
    border: none;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: white;
    box-shadow: var(--shadow), 0 4px 14px -4px rgba(14, 165, 233, 0.4);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md), 0 8px 20px -4px rgba(14, 165, 233, 0.5);
    color: white;
}

.btn-sale {
    background: linear-gradient(135deg, var(--color-sale) 0%, var(--color-sale-dark) 100%);
    color: white;
    box-shadow: var(--shadow), 0 4px 14px -4px rgba(220, 38, 38, 0.4);
    animation: pulse-sale 2s infinite;
}

.btn-sale:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md), 0 8px 20px -4px rgba(220, 38, 38, 0.5);
    color: white;
}

@keyframes pulse-sale {
    0%, 100% { box-shadow: var(--shadow), 0 4px 14px -4px rgba(220, 38, 38, 0.4); }
    50% { box-shadow: var(--shadow), 0 4px 20px -4px rgba(220, 38, 38, 0.6); }
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--color-primary);
    color: var(--color-primary);
}

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

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.1rem;
    border-radius: var(--radius-lg);
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

/* Main Content */
main {
    flex: 1;
    padding: 3rem 0;
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 3rem 0 4rem;
}

.hero h1 {
    margin-bottom: 1rem;
    font-size: 2.5rem;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-muted);
    max-width: 600px;
    margin: 0 auto 2rem;
}

/* Tools Grid */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.tool-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    text-decoration: none;
    color: inherit;
    transition: all var(--transition);
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.tool-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary-light);
}

.tool-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, rgba(14, 165, 233, 0.1) 0%, rgba(6, 182, 212, 0.1) 100%);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.tool-card h3 {
    font-size: 1.125rem;
}

.tool-card p {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    margin: 0;
    flex: 1;
}

.tool-arrow {
    color: var(--color-primary);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
}

/* Page Header */
.page-header {
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--color-border);
}

.page-header h1 {
    margin-bottom: 0.5rem;
}

.page-header p {
    color: var(--color-text-muted);
    margin: 0;
}

/* Card Component */
.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-sm);
}

.card-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--color-border);
}

.card-header h2, .card-header h3 {
    margin: 0;
}

/* Form Elements */
.form-group {
    margin-bottom: 1.25rem;
}

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

.form-input {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    font-family: inherit;
    border: 2px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-surface);
    color: var(--color-text);
    transition: all var(--transition);
}

.form-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
}

.form-input::placeholder {
    color: var(--color-text-light);
}

.input-group {
    display: flex;
    gap: 0.75rem;
}

.input-group .form-input {
    flex: 1;
}

/* Results Display */
.results {
    background: var(--color-surface-alt);
    border-radius: var(--radius);
    padding: 1.25rem;
    margin-top: 1rem;
}

.results-header {
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--color-text);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.results pre {
    background: var(--color-text);
    color: #e2e8f0;
    padding: 1rem;
    border-radius: var(--radius);
    overflow-x: auto;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    line-height: 1.5;
    margin: 0;
}

.results-item {
    display: flex;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--color-border);
}

.results-item:last-child {
    border-bottom: none;
}

.results-label {
    font-weight: 500;
    min-width: 140px;
    color: var(--color-text-muted);
}

.results-value {
    color: var(--color-text);
    font-family: var(--font-mono);
    word-break: break-all;
}

/* Speed Test Specific */
.speed-test-container {
    text-align: center;
    padding: 2rem 0;
}

.speed-gauge {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-surface-alt) 0%, var(--color-surface) 100%);
    border: 4px solid var(--color-border);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin: 2rem auto;
    position: relative;
    box-shadow: var(--shadow-md);
}

.speed-value {
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1;
}

.speed-unit {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.speed-results {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin-top: 2rem;
}

.speed-stat {
    background: var(--color-surface-alt);
    padding: 1rem;
    border-radius: var(--radius);
    text-align: center;
}

.speed-stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
}

.speed-stat-label {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Info Box */
.info-box {
    background: linear-gradient(135deg, rgba(14, 165, 233, 0.05) 0%, rgba(6, 182, 212, 0.05) 100%);
    border: 1px solid rgba(14, 165, 233, 0.2);
    border-radius: var(--radius);
    padding: 1.25rem;
    margin: 1.5rem 0;
}

.info-box h3 {
    color: var(--color-primary);
    margin-bottom: 0.5rem;
    font-size: 1rem;
}

.info-box p {
    margin: 0;
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

/* For Sale Page */
.sale-hero {
    text-align: center;
    padding: 4rem 2rem;
    background: linear-gradient(135deg, rgba(220, 38, 38, 0.05) 0%, rgba(185, 28, 28, 0.05) 100%);
    border-radius: var(--radius-xl);
    margin-bottom: 2rem;
}

.sale-badge {
    display: inline-block;
    background: var(--color-sale);
    color: white;
    padding: 0.5rem 1.25rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.sale-domain {
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 0.5rem;
}

.sale-tagline {
    font-size: 1.25rem;
    color: var(--color-text-muted);
    margin-bottom: 2rem;
}

.sale-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.sale-feature {
    background: var(--color-surface);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

.sale-feature-icon {
    font-size: 2rem;
    margin-bottom: 0.75rem;
}

.sale-feature h3 {
    font-size: 1rem;
    margin-bottom: 0.5rem;
}

.sale-feature p {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    margin: 0;
}

.use-cases {
    background: var(--color-surface);
    padding: 2rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    margin: 2rem 0;
}

.use-cases h2 {
    margin-bottom: 1.5rem;
}

.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.use-case {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    background: var(--color-surface-alt);
    border-radius: var(--radius);
}

.use-case-icon {
    font-size: 1.25rem;
}

/* Footer */
.footer {
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    padding: 2rem 0;
    margin-top: auto;
}

.footer-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    text-align: center;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem 2rem;
}

.footer-links a {
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

.footer-links a:hover {
    color: var(--color-primary);
}

.footer-copyright {
    color: var(--color-text-light);
    font-size: 0.875rem;
}

/* Loading Spinner */
.spinner {
    width: 24px;
    height: 24px;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 2rem;
    color: var(--color-text-muted);
}

/* DNS Records Table */
.dns-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
    font-size: 0.9rem;
}

.dns-table th,
.dns-table td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

.dns-table th {
    background: var(--color-surface-alt);
    font-weight: 600;
    color: var(--color-text);
}

.dns-table td {
    font-family: var(--font-mono);
    color: var(--color-text-muted);
}

.dns-table tr:hover td {
    background: rgba(14, 165, 233, 0.03);
}

/* Record Type Badge */
.record-type {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    background: var(--color-primary);
    color: white;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
}

/* Responsive */
@media (max-width: 768px) {
    .header-inner {
        flex-wrap: wrap;
    }
    
    .nav {
        display: none;
        width: 100%;
        flex-direction: column;
        padding-top: 1rem;
        border-top: 1px solid var(--color-border);
        margin-top: 1rem;
    }
    
    .nav.active {
        display: flex;
    }
    
    .nav-link {
        width: 100%;
        text-align: center;
    }
    
    .mobile-toggle {
        display: block;
    }
    
    h1 { font-size: 1.75rem; }
    h2 { font-size: 1.5rem; }
    
    .hero {
        padding: 2rem 0 3rem;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .tools-grid {
        grid-template-columns: 1fr;
    }
    
    .speed-results {
        grid-template-columns: 1fr;
    }
    
    .sale-domain {
        font-size: 2rem;
    }
    
    .input-group {
        flex-direction: column;
    }
    
    .dns-table {
        font-size: 0.8rem;
    }
    
    .dns-table th,
    .dns-table td {
        padding: 0.5rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }
    
    .card {
        padding: 1rem;
    }
    
    .btn {
        width: 100%;
    }
    
    .btn-lg {
        padding: 0.875rem 1.5rem;
        font-size: 1rem;
    }
}