/* DNS Checker - Professional Design System */

:root {
    /* Brand Colors - Extended Palette */
    --dns-primary: #ff3679;
    --dns-primary-light: #ff5c8d;
    --dns-primary-lighter: #ff8fb3;
    --dns-primary-dark: #e6185f;
    --dns-primary-darker: #cc0048;
    
    /* Background Colors */
    --dns-bg: #fbf5f2;
    --dns-bg-secondary: #fff9f6;
    --dns-white: #ffffff;
    
    /* Modern Success/Error Colors */
    --dns-success: #10b981;
    --dns-success-light: #34d399;
    --dns-success-bg: #d1fae5;
    --dns-error: #ef4444;
    --dns-error-light: #f87171;
    --dns-error-bg: #fee2e2;
    --dns-warning: #f59e0b;
    --dns-warning-bg: #fef3c7;
    --dns-info: #3b82f6;
    --dns-info-bg: #dbeafe;
    
    /* Neutral Grays - Professional Scale */
    --dns-gray-50: #f9fafb;
    --dns-gray-100: #f3f4f6;
    --dns-gray-200: #e5e7eb;
    --dns-gray-300: #d1d5db;
    --dns-gray-400: #9ca3af;
    --dns-gray-500: #6b7280;
    --dns-gray-600: #4b5563;
    --dns-gray-700: #374151;
    --dns-gray-800: #1f2937;
    --dns-gray-900: #111827;
    
    /* Text Colors */
    --dns-text-dark: #1f2937;
    --dns-text-body: #374151;
    --dns-text-light: #6b7280;
    --dns-text-lighter: #9ca3af;
    
    /* Border Colors */
    --dns-border: #e5e7eb;
    --dns-border-light: #f3f4f6;
    --dns-border-dark: #d1d5db;
    
    /* Shadows - Elevation System */
    --dns-shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --dns-shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
    --dns-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --dns-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --dns-shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --dns-shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --dns-shadow-primary: 0 10px 25px -5px rgba(255, 54, 121, 0.3);
    
    /* Spacing Scale - 8px base */
    --dns-space-1: 0.25rem;  /* 4px */
    --dns-space-2: 0.5rem;   /* 8px */
    --dns-space-3: 0.75rem;  /* 12px */
    --dns-space-4: 1rem;     /* 16px */
    --dns-space-5: 1.25rem;  /* 20px */
    --dns-space-6: 1.5rem;   /* 24px */
    --dns-space-8: 2rem;     /* 32px */
    --dns-space-10: 2.5rem;  /* 40px */
    --dns-space-12: 3rem;    /* 48px */
    --dns-space-16: 4rem;    /* 64px */
    
    /* Border Radius Scale */
    --dns-radius-sm: 0.375rem;  /* 6px */
    --dns-radius-md: 0.5rem;    /* 8px */
    --dns-radius-lg: 0.75rem;   /* 12px */
    --dns-radius-xl: 1rem;      /* 16px */
    --dns-radius-2xl: 1.5rem;   /* 24px */
    --dns-radius-full: 9999px;
    
    /* Transitions */
    --dns-transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --dns-transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --dns-transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Z-index Scale */
    --dns-z-base: 1;
    --dns-z-dropdown: 100;
    --dns-z-sticky: 200;
    --dns-z-fixed: 300;
    --dns-z-modal: 400;
    --dns-z-popover: 500;
    --dns-z-tooltip: 600;
}

/* Global Styles */
* {
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Hero Section - Professional Design */
.dns-hero {
    background: linear-gradient(135deg, #ff3679 0%, #ff5c8d 50%, #ff8fb3 100%);
    padding: var(--dns-space-12) 0 var(--dns-space-16) 0;
    position: relative;
    overflow: hidden;
}

.dns-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    opacity: 0.6;
    z-index: 0;
}

.dns-hero::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 80px;
    background: linear-gradient(to bottom, transparent 0%, var(--dns-bg) 100%);
    z-index: 0;
    pointer-events: none;
}

.dns-hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
}

.dns-hero-title {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: var(--dns-space-4);
    color: var(--dns-white);
    letter-spacing: -0.02em;
    line-height: 1.2;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--dns-space-4);
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.dns-hero-title i {
    font-size: 3.5rem;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

.dns-hero-subtitle {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.95);
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.6;
    font-weight: 500;
}

/* Hero Feature Badges */
.dns-hero-features {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--dns-space-4);
    margin-top: var(--dns-space-8);
    margin-bottom: var(--dns-space-4);
    flex-wrap: wrap;
    position: relative;
    z-index: 10;
}

.dns-feature-badge {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: var(--dns-radius-lg);
    padding: var(--dns-space-3) var(--dns-space-5);
    display: flex;
    align-items: center;
    gap: var(--dns-space-2);
    color: var(--dns-white);
    font-size: 0.95rem;
    font-weight: 600;
    transition: all var(--dns-transition-base);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    cursor: default;
    user-select: none;
}

.dns-feature-badge i {
    font-size: 1.1rem;
    color: var(--dns-white);
}

.dns-feature-badge:hover {
    transform: translateY(-3px) scale(1.02);
    background: rgba(255, 255, 255, 0.25);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    border-color: rgba(255, 255, 255, 0.35);
}

/* DNS Check Section */
.dns-check-section {
    padding: 0 0 var(--dns-space-16);
    background: var(--dns-bg);
    position: relative;
}

.dns-check-card {
    background: var(--dns-white);
    border-radius: var(--dns-radius-2xl);
    padding: var(--dns-space-10);
    box-shadow: var(--dns-shadow-xl);
    margin-top: calc(-1 * var(--dns-space-16));
    position: relative;
    z-index: var(--dns-z-sticky);
    border: 1px solid var(--dns-border-light);
}

/* 2-Column Layout Wrapper */
.dns-columns-wrapper {
    display: grid;
    grid-template-columns: 60% 40%;
    gap: var(--dns-space-8);
    align-items: start;
    margin-top: var(--dns-space-8);
}

.dns-left-column {
    display: flex;
    flex-direction: column;
    gap: var(--dns-space-6);
}

.dns-right-column {
    position: sticky;
    top: var(--dns-space-8);
    max-height: calc(100vh - 6rem);
    overflow-y: auto;
    overflow-x: hidden;
    display: flex;
    flex-direction: column;
    gap: var(--dns-space-6);
}

/* Custom Scrollbar for Right Column */
.dns-right-column::-webkit-scrollbar {
    width: 8px;
}

.dns-right-column::-webkit-scrollbar-track {
    background: var(--dns-gray-100);
    border-radius: var(--dns-radius-md);
}

.dns-right-column::-webkit-scrollbar-thumb {
    background: var(--dns-primary);
    border-radius: var(--dns-radius-md);
    transition: background var(--dns-transition-fast);
}

.dns-right-column::-webkit-scrollbar-thumb:hover {
    background: var(--dns-primary-dark);
}

/* Firefox scrollbar */
.dns-right-column {
    scrollbar-width: thin;
    scrollbar-color: var(--dns-primary) var(--dns-gray-100);
}

.dns-check-title {
    font-size: 2rem;
    font-weight: 800;
    color: var(--dns-text-dark);
    margin-bottom: var(--dns-space-8);
    letter-spacing: -0.02em;
    text-align: center;
}

/* Input Form - Elevated Design */
.dns-input-form {
    display: grid;
    grid-template-columns: 1fr auto auto;
    gap: var(--dns-space-4);
    margin-bottom: var(--dns-space-6);
    padding: var(--dns-space-6);
    background: var(--dns-gray-50);
    border-radius: var(--dns-radius-xl);
    border: 2px solid var(--dns-border);
}

.dns-domain-input,
.dns-record-select {
    padding: var(--dns-space-4) var(--dns-space-5);
    border: 2px solid var(--dns-border);
    border-radius: var(--dns-radius-lg);
    font-size: 1rem;
    font-weight: 500;
    transition: all var(--dns-transition-base);
    background: var(--dns-white);
    color: var(--dns-text-dark);
    box-shadow: var(--dns-shadow-xs);
}

.dns-domain-input:hover,
.dns-record-select:hover {
    border-color: var(--dns-primary-light);
    box-shadow: var(--dns-shadow-sm);
}

.dns-domain-input:focus,
.dns-record-select:focus {
    outline: none;
    border-color: var(--dns-primary);
    box-shadow: 0 0 0 3px rgba(255, 54, 121, 0.1), var(--dns-shadow-md);
    transform: translateY(-1px);
}

.dns-domain-input::placeholder {
    color: var(--dns-text-lighter);
    font-weight: 400;
}

.dns-record-select {
    cursor: pointer;
    min-width: 160px;
    font-weight: 600;
}

.dns-search-btn {
    padding: var(--dns-space-4) var(--dns-space-10);
    background: linear-gradient(135deg, var(--dns-primary) 0%, var(--dns-primary-light) 100%);
    color: var(--dns-white);
    border: none;
    border-radius: var(--dns-radius-lg);
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: all var(--dns-transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--dns-space-2);
    box-shadow: var(--dns-shadow-primary);
    position: relative;
    overflow: hidden;
}

.dns-search-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left var(--dns-transition-slow);
}

.dns-search-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 30px -8px rgba(255, 54, 121, 0.4);
}

.dns-search-btn:hover::before {
    left: 100%;
}

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

.dns-search-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* Action Icons */
.dns-actions {
    display: flex;
    align-items: center;
    gap: var(--dns-space-4);
    margin-bottom: var(--dns-space-6);
    flex-wrap: wrap;
    padding: 0 var(--dns-space-2);
}

.dns-action-btn {
    width: 44px;
    height: 44px;
    background: var(--dns-white);
    border: 2px solid var(--dns-border);
    border-radius: var(--dns-radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--dns-transition-base);
    color: var(--dns-text-body);
    font-size: 1.1rem;
    box-shadow: var(--dns-shadow-xs);
}

.dns-action-btn:hover {
    border-color: var(--dns-primary);
    color: var(--dns-primary);
    transform: translateY(-2px) scale(1.05);
    box-shadow: var(--dns-shadow-md);
}

.dns-checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--dns-space-2);
    cursor: pointer;
    font-weight: 600;
    color: var(--dns-text-body);
    padding: var(--dns-space-2) var(--dns-space-4);
    border-radius: var(--dns-radius-md);
    transition: all var(--dns-transition-fast);
}

.dns-checkbox-label:hover {
    background: var(--dns-gray-50);
}

.dns-checkbox-label input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
    accent-color: var(--dns-primary);
}

.dns-refresh-control {
    display: flex;
    align-items: center;
    gap: var(--dns-space-2);
    margin-left: auto;
    font-weight: 600;
    color: var(--dns-text-body);
    padding: var(--dns-space-2) var(--dns-space-4);
    background: var(--dns-white);
    border-radius: var(--dns-radius-lg);
    border: 2px solid var(--dns-border);
    box-shadow: var(--dns-shadow-xs);
}

.dns-refresh-select {
    padding: var(--dns-space-2) var(--dns-space-3);
    border: 1px solid var(--dns-border);
    border-radius: var(--dns-radius-md);
    background: var(--dns-white);
    cursor: pointer;
    font-weight: 600;
    transition: all var(--dns-transition-fast);
}

.dns-refresh-select:hover {
    border-color: var(--dns-primary);
}

.dns-refresh-countdown {
    color: var(--dns-primary);
    font-weight: 700;
    min-width: 60px;
    font-variant-numeric: tabular-nums;
}

/* World Map Section - Enhanced */
.dns-map-section {
    padding: var(--dns-space-6);
    background: var(--dns-white);
    border-radius: var(--dns-radius-xl);
    box-shadow: var(--dns-shadow-md);
    border: 1px solid var(--dns-border-light);
}

.dns-map-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--dns-text-dark);
    margin-bottom: var(--dns-space-4);
    text-align: center;
    letter-spacing: -0.01em;
}

.dns-world-map {
    width: 100%;
    height: 400px;
    border-radius: var(--dns-radius-lg);
    overflow: hidden;
    border: 2px solid var(--dns-border);
    box-shadow: var(--dns-shadow-md);
    background: #e3eaef;
    position: relative;
}

.dns-world-map::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--dns-radius-lg);
    box-shadow: inset 0 2px 10px rgba(0, 0, 0, 0.1);
    pointer-events: none;
}

.dns-map-legend {
    display: flex;
    justify-content: center;
    gap: var(--dns-space-6);
    margin-top: var(--dns-space-4);
    padding: var(--dns-space-4);
    background: var(--dns-gray-50);
    border-radius: var(--dns-radius-lg);
    border: 1px solid var(--dns-border-light);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: var(--dns-space-2);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--dns-text-body);
}

.legend-icon {
    font-size: 1.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.legend-location {
    color: #ff9800;
}

.legend-resolved {
    color: var(--dns-success);
}

.legend-not-resolved {
    color: var(--dns-error);
}

/* DNS Lists Section - Professional Filter Design */
.dns-lists-section {
    background: var(--dns-white);
    padding: var(--dns-space-6);
    border-radius: var(--dns-radius-xl);
    border: 1px solid var(--dns-border-light);
    box-shadow: var(--dns-shadow-md);
}

.dns-lists-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--dns-text-dark);
    margin-bottom: var(--dns-space-5);
    letter-spacing: -0.01em;
}

/* IP Version Toggle */
.dns-ip-toggle {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--dns-space-2);
    margin-bottom: var(--dns-space-5);
    padding: var(--dns-space-2);
    background: var(--dns-gray-50);
    border-radius: var(--dns-radius-lg);
}

.dns-ip-btn {
    padding: var(--dns-space-3) var(--dns-space-4);
    background: transparent;
    border: 2px solid transparent;
    border-radius: var(--dns-radius-md);
    cursor: pointer;
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--dns-text-body);
    transition: all var(--dns-transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--dns-space-2);
}

.dns-ip-btn:hover {
    background: var(--dns-white);
    box-shadow: var(--dns-shadow-sm);
}

.dns-ip-btn.active {
    background: var(--dns-white);
    border-color: var(--dns-primary);
    color: var(--dns-primary);
    box-shadow: var(--dns-shadow-md);
}

/* Filter Sections */
.dns-filter-section {
    margin-bottom: var(--dns-space-6);
}

.dns-filter-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--dns-text-dark);
    margin-bottom: var(--dns-space-3);
    display: flex;
    align-items: center;
    gap: var(--dns-space-2);
}

.dns-filter-title::before {
    content: '';
    width: 4px;
    height: 20px;
    background: linear-gradient(to bottom, var(--dns-primary), var(--dns-primary-light));
    border-radius: var(--dns-radius-full);
}

.dns-continent-filters {
    display: flex;
    gap: var(--dns-space-2);
    flex-wrap: wrap;
}

.dns-continent-btn {
    padding: var(--dns-space-2) var(--dns-space-4);
    background: var(--dns-white);
    border: 2px solid var(--dns-border);
    border-radius: var(--dns-radius-full);
    cursor: pointer;
    font-weight: 600;
    color: var(--dns-text-body);
    transition: all var(--dns-transition-base);
    display: flex;
    align-items: center;
    gap: var(--dns-space-2);
    font-size: 0.8125rem;
    box-shadow: var(--dns-shadow-xs);
}

.dns-continent-btn:hover {
    border-color: var(--dns-primary-light);
    color: var(--dns-primary);
    transform: translateY(-2px);
    box-shadow: var(--dns-shadow-md);
}

.dns-continent-btn.active {
    background: linear-gradient(135deg, var(--dns-primary), var(--dns-primary-light));
    border-color: var(--dns-primary);
    color: var(--dns-white);
    box-shadow: var(--dns-shadow-primary);
}

.dns-country-filters {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: var(--dns-space-2);
}

.dns-country-btn {
    padding: var(--dns-space-2) var(--dns-space-3);
    background: var(--dns-white);
    border: 2px solid var(--dns-border);
    border-radius: var(--dns-radius-md);
    cursor: pointer;
    font-weight: 600;
    color: var(--dns-text-body);
    transition: all var(--dns-transition-base);
    text-align: left;
    font-size: 0.8125rem;
    box-shadow: var(--dns-shadow-xs);
}

.dns-country-btn:hover {
    border-color: var(--dns-primary-light);
    background: var(--dns-gray-50);
    transform: translateX(4px);
    box-shadow: var(--dns-shadow-sm);
}

.dns-country-btn.active {
    background: linear-gradient(135deg, var(--dns-primary), var(--dns-primary-light));
    border-color: var(--dns-primary);
    color: var(--dns-white);
    box-shadow: var(--dns-shadow-primary);
}

/* Expected Value Section */
.dns-expected-section {
    background: linear-gradient(135deg, var(--dns-gray-50), var(--dns-white));
    padding: var(--dns-space-6);
    border-radius: var(--dns-radius-xl);
    margin-bottom: var(--dns-space-8);
    border: 2px solid var(--dns-border-light);
    box-shadow: var(--dns-shadow-sm);
}

.dns-expected-input-group {
    display: flex;
    align-items: center;
    gap: var(--dns-space-4);
    margin-bottom: var(--dns-space-5);
}

.dns-expected-input-group label {
    font-weight: 700;
    color: var(--dns-text-dark);
    min-width: 130px;
    font-size: 0.9375rem;
}

.dns-expected-input {
    flex: 1;
    padding: var(--dns-space-3) var(--dns-space-4);
    border: 2px solid var(--dns-border);
    border-radius: var(--dns-radius-lg);
    font-size: 0.9375rem;
    transition: all var(--dns-transition-base);
    background: var(--dns-white);
    box-shadow: var(--dns-shadow-xs);
}

.dns-expected-input:focus {
    outline: none;
    border-color: var(--dns-primary);
    box-shadow: 0 0 0 3px rgba(255, 54, 121, 0.1);
}

.dns-match-type {
    display: flex;
    gap: var(--dns-space-3);
    margin-bottom: var(--dns-space-5);
}

.dns-match-btn {
    padding: var(--dns-space-3) var(--dns-space-5);
    border: 2px solid var(--dns-border);
    background: var(--dns-white);
    border-radius: var(--dns-radius-full);
    cursor: pointer;
    font-weight: 600;
    color: var(--dns-text-body);
    transition: all var(--dns-transition-base);
    font-size: 0.9375rem;
    box-shadow: var(--dns-shadow-xs);
}

.dns-match-btn:hover {
    border-color: var(--dns-primary-light);
    color: var(--dns-primary);
}

.dns-match-btn.active {
    background: linear-gradient(135deg, var(--dns-primary), var(--dns-primary-light));
    border-color: var(--dns-primary);
    color: var(--dns-white);
    box-shadow: var(--dns-shadow-primary);
}

.dns-counters {
    display: flex;
    gap: var(--dns-space-8);
    justify-content: center;
}

.dns-counter {
    font-size: 1rem;
    color: var(--dns-text-light);
    font-weight: 500;
}

.dns-counter strong {
    display: inline-block;
    min-width: 44px;
    padding: var(--dns-space-1) var(--dns-space-3);
    background: var(--dns-white);
    border-radius: var(--dns-radius-md);
    font-weight: 700;
    font-size: 1.25rem;
    margin-left: var(--dns-space-2);
    box-shadow: var(--dns-shadow-sm);
}

.dns-counter-resolved strong {
    color: var(--dns-success);
    border: 2px solid var(--dns-success-light);
}

.dns-counter-unresolved strong {
    color: var(--dns-error);
    border: 2px solid var(--dns-error-light);
}

/* DNS Servers List - Card-Based Design */
.dns-servers-list {
    display: flex;
    flex-direction: column;
    gap: var(--dns-space-4);
    margin-bottom: var(--dns-space-8);
}

.dns-server-row {
    display: grid;
    grid-template-columns: 2fr 1.5fr 2fr auto;
    gap: var(--dns-space-4);
    padding: var(--dns-space-5) var(--dns-space-6);
    background: var(--dns-white);
    border: 2px solid var(--dns-border);
    border-radius: var(--dns-radius-xl);
    align-items: center;
    transition: all var(--dns-transition-base);
    box-shadow: var(--dns-shadow-sm);
    position: relative;
    overflow: hidden;
}

.dns-server-row::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--dns-gray-300);
    transition: all var(--dns-transition-base);
}

.dns-server-row:hover {
    box-shadow: var(--dns-shadow-lg);
    transform: translateY(-2px);
    border-color: var(--dns-primary-lighter);
}

.dns-server-row.success::before {
    background: linear-gradient(to bottom, var(--dns-success), var(--dns-success-light));
}

.dns-server-row.error::before {
    background: linear-gradient(to bottom, var(--dns-error), var(--dns-error-light));
}

.dns-server-row.success {
    background: linear-gradient(135deg, var(--dns-white), var(--dns-success-bg));
    border-color: var(--dns-success-light);
}

.dns-server-row.error {
    background: linear-gradient(135deg, var(--dns-white), var(--dns-error-bg));
    border-color: var(--dns-error-light);
}

.dns-server-row.pending {
    background: linear-gradient(135deg, var(--dns-white), var(--dns-gray-50));
}

.dns-server-location {
    display: flex;
    align-items: center;
    gap: var(--dns-space-3);
}

.dns-flag {
    font-size: 1.75rem;
    line-height: 1;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.dns-location-name {
    font-weight: 600;
    color: var(--dns-text-dark);
    font-size: 0.9375rem;
    line-height: 1.4;
}

.dns-server-provider {
    display: flex;
    align-items: center;
    gap: var(--dns-space-2);
    color: var(--dns-text-light);
    font-size: 0.875rem;
    font-weight: 500;
}

.dns-server-provider i {
    color: var(--dns-primary);
    cursor: help;
    font-size: 0.875rem;
    transition: transform var(--dns-transition-fast);
}

.dns-server-provider i:hover {
    transform: scale(1.2);
}

.dns-server-result {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--dns-space-3);
}

.dns-result-value {
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Roboto Mono', 'Courier New', monospace;
    font-weight: 600;
    color: var(--dns-text-dark);
    font-size: 0.875rem;
    word-break: break-all;
    flex: 1;
    padding: var(--dns-space-2) var(--dns-space-3);
    background: var(--dns-white);
    border-radius: var(--dns-radius-md);
}

.dns-copy-btn {
    background: var(--dns-white);
    border: 2px solid var(--dns-border);
    color: var(--dns-primary);
    cursor: pointer;
    padding: var(--dns-space-2);
    border-radius: var(--dns-radius-md);
    transition: all var(--dns-transition-base);
    opacity: 0;
    transform: scale(0.9);
    box-shadow: var(--dns-shadow-xs);
}

.dns-server-row:hover .dns-copy-btn {
    opacity: 1;
    transform: scale(1);
}

.dns-copy-btn:hover {
    background: var(--dns-primary);
    color: var(--dns-white);
    border-color: var(--dns-primary);
    transform: scale(1.1);
    box-shadow: var(--dns-shadow-md);
}

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

.dns-server-status {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    min-width: 44px;
}

.dns-loading-icon {
    color: var(--dns-primary);
    font-size: 1.25rem;
}

.dns-success-icon {
    color: var(--dns-success);
    font-size: 1.5rem;
}

.dns-error-icon {
    color: var(--dns-error);
    font-size: 1.5rem;
}

/* Export Section */
.dns-export-section {
    display: flex;
    gap: var(--dns-space-4);
    justify-content: center;
    padding-top: var(--dns-space-6);
    border-top: 2px solid var(--dns-border-light);
}

/* Enhanced Export Button Styles */
.dns-export-section .btn {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: var(--dns-space-2);
    padding: 14px 28px;
    font-size: 15px;
    font-weight: 600;
    letter-spacing: 0.3px;
    border-radius: var(--dns-radius-lg);
    border: none;
    cursor: pointer;
    transition: all var(--dns-transition-base);
    overflow: hidden;
    box-shadow: var(--dns-shadow-md);
}

.dns-export-section .btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.2) 0%, rgba(255, 255, 255, 0) 100%);
    opacity: 0;
    transition: opacity var(--dns-transition-base);
}

.dns-export-section .btn:hover::before {
    opacity: 1;
}

/* CSV Button - Gradient Green */
.dns-export-section #export-csv-btn {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
}

.dns-export-section #export-csv-btn:hover {
    background: linear-gradient(135deg, #059669 0%, #047857 100%);
    transform: translateY(-2px);
    box-shadow: 0 12px 20px -5px rgba(16, 185, 129, 0.4);
}

.dns-export-section #export-csv-btn:active {
    transform: translateY(0);
    box-shadow: var(--dns-shadow-sm);
}

.dns-export-section #export-csv-btn i {
    font-size: 16px;
    transition: transform var(--dns-transition-base);
}

.dns-export-section #export-csv-btn:hover i {
    transform: translateY(2px);
}

/* JSON Button - Gradient Blue */
.dns-export-section #export-json-btn {
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    color: white;
}

.dns-export-section #export-json-btn:hover {
    background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
    transform: translateY(-2px);
    box-shadow: 0 12px 20px -5px rgba(59, 130, 246, 0.4);
}

.dns-export-section #export-json-btn:active {
    transform: translateY(0);
    box-shadow: var(--dns-shadow-sm);
}

.dns-export-section #export-json-btn i {
    font-size: 16px;
    transition: transform var(--dns-transition-base);
}

.dns-export-section #export-json-btn:hover i {
    transform: translateY(2px);
}

/* Button Loading State */
.dns-export-section .btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

/* Button Focus States */
.dns-export-section .btn:focus {
    outline: none;
    ring: 3px solid rgba(59, 130, 246, 0.3);
}

.dns-export-section #export-csv-btn:focus {
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.3);
}

.dns-export-section #export-json-btn:focus {
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.3);
}

/* Custom Map Markers */
.custom-dns-marker {
    background: transparent !important;
    border: none !important;
}

.dns-marker-pin {
    font-size: 32px;
    text-align: center;
    line-height: 1;
    filter: drop-shadow(0 4px 8px rgba(0,0,0,0.25));
    animation: markerPulse 2s ease-in-out infinite;
}

@keyframes markerPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.dns-marker-success {
    font-size: 28px;
    color: var(--dns-success);
    background: var(--dns-white);
    border-radius: 50%;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    border: 3px solid var(--dns-success);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.4);
    animation: successBounce 0.5s ease-out;
}

@keyframes successBounce {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.2); }
}

.dns-marker-error {
    font-size: 28px;
    color: var(--dns-error);
    background: var(--dns-white);
    border-radius: 50%;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    border: 3px solid var(--dns-error);
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.4);
}

/* Leaflet Popup Customization */
.leaflet-popup-content-wrapper {
    border-radius: var(--dns-radius-lg);
    box-shadow: var(--dns-shadow-xl);
    border: 2px solid var(--dns-border-light);
}

.leaflet-popup-content {
    margin: var(--dns-space-4);
    font-family: inherit;
}

/* Loading Animation */
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.fa-spin {
    animation: spin 1s linear infinite;
}

/* Scroll to Top Button */
.scroll-to-top {
    position: fixed;
    bottom: var(--dns-space-8);
    right: var(--dns-space-8);
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--dns-primary), var(--dns-primary-light));
    color: var(--dns-white);
    border: none;
    border-radius: var(--dns-radius-full);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    box-shadow: var(--dns-shadow-xl);
    opacity: 0;
    visibility: hidden;
    transition: all var(--dns-transition-base);
    z-index: var(--dns-z-fixed);
}

.scroll-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-to-top:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(255, 54, 121, 0.4);
}

/* Mobile Responsive Design */
@media (max-width: 1199px) {
    .dns-columns-wrapper {
        grid-template-columns: 55% 45%;
        gap: var(--dns-space-6);
    }
    
    .dns-world-map {
        height: 350px;
    }
    
    .dns-country-filters {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    }
}

@media (max-width: 1024px) {
    .dns-columns-wrapper {
        grid-template-columns: 1fr;
        gap: var(--dns-space-6);
    }
    
    .dns-right-column {
        position: static;
        max-height: none;
        overflow-y: visible;
    }
    
    .dns-server-row {
        grid-template-columns: 1.5fr 1fr 1.5fr auto;
        gap: var(--dns-space-3);
        padding: var(--dns-space-4) var(--dns-space-5);
    }
    
    .dns-location-name,
    .dns-server-provider {
        font-size: 0.875rem;
    }
    
    .dns-result-value {
        font-size: 0.8125rem;
    }
    
    .dns-world-map {
        height: 400px;
    }
    
    .dns-map-legend {
        flex-direction: row;
        gap: var(--dns-space-5);
    }
}

@media (max-width: 768px) {
    :root {
        --dns-space-8: 1.5rem;
        --dns-space-10: 2rem;
        --dns-space-12: 2.5rem;
        --dns-space-16: 3rem;
    }

    /* Compact DNS Hero Section */
    .dns-hero {
        padding: var(--dns-space-8) 0 var(--dns-space-10) 0;
    }

    .dns-hero::after {
        height: 50px;
    }
    
    .dns-hero-title {
        font-size: 1.75rem;
        margin-bottom: var(--dns-space-3);
        gap: var(--dns-space-3);
    }

    .dns-hero-title i {
        font-size: 2rem;
    }
    
    .dns-hero-subtitle {
        font-size: 0.9375rem;
        line-height: 1.5;
    }
    
    .dns-hero-features {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: var(--dns-space-3);
        margin-top: var(--dns-space-6);
        margin-bottom: var(--dns-space-3);
        max-width: 500px;
        margin-left: auto;
        margin-right: auto;
        padding: 0 var(--dns-space-4);
    }
    
    .dns-feature-badge {
        padding: var(--dns-space-3) var(--dns-space-3);
        font-size: 0.8125rem;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: var(--dns-space-2);
        text-align: center;
        white-space: nowrap;
    }
    
    .dns-check-card {
        padding: var(--dns-space-6);
        margin-top: calc(-1 * var(--dns-space-6));
        border-radius: var(--dns-radius-xl);
    }

    .dns-check-section {
        padding-top: var(--dns-space-4);
    }
    
    .dns-check-title {
        font-size: 1.5rem;
    }
    
    .dns-input-form {
        grid-template-columns: 1fr;
        padding: var(--dns-space-4);
        gap: var(--dns-space-3);
    }
    
    .dns-search-btn {
        width: 100%;
        justify-content: center;
        padding: var(--dns-space-4);
    }
    
    .dns-actions {
        flex-wrap: wrap;
    }
    
    .dns-refresh-control {
        width: 100%;
        justify-content: center;
    }
    
    .dns-columns-wrapper {
        grid-template-columns: 1fr;
        gap: var(--dns-space-5);
    }
    
    .dns-right-column {
        position: static;
        max-height: none;
        overflow-y: visible;
    }

    .dns-map-section {
        padding: var(--dns-space-5);
    }

    .dns-world-map {
        height: 300px;
    }

    .dns-map-legend {
        flex-direction: column;
        gap: var(--dns-space-3);
    }

    .dns-lists-section {
        padding: var(--dns-space-5);
    }

    .dns-ip-toggle {
        grid-template-columns: 1fr;
    }

    .dns-continent-filters {
        gap: var(--dns-space-2);
    }

    .dns-continent-btn {
        font-size: 0.875rem;
        padding: var(--dns-space-2) var(--dns-space-4);
    }

    .dns-country-filters {
        grid-template-columns: 1fr;
    }
    
    .dns-expected-input-group {
        flex-direction: column;
        align-items: stretch;
    }
    
    .dns-expected-input-group label {
        min-width: auto;
    }
    
    .dns-match-type {
        flex-wrap: wrap;
    }
    
    .dns-match-btn {
        flex: 1;
        min-width: 100px;
    }
    
    .dns-counters {
        flex-direction: column;
        gap: var(--dns-space-3);
    }
    
    .dns-server-row {
        grid-template-columns: 1fr;
        gap: var(--dns-space-3);
        padding: var(--dns-space-4);
        position: relative;
        padding-top: var(--dns-space-6);
    }
    
    .dns-server-location,
    .dns-server-provider,
    .dns-server-result {
        justify-content: flex-start;
    }
    
    .dns-server-status {
        position: absolute;
        top: var(--dns-space-4);
        right: var(--dns-space-4);
        width: auto;
    }
    
    .dns-copy-btn {
        opacity: 1;
        transform: scale(1);
    }
    
    .dns-export-section {
        flex-direction: column;
        gap: var(--dns-space-3);
    }
    
    .dns-export-section .btn {
        width: 100%;
        justify-content: center;
        padding: 12px 24px;
        font-size: 14px;
    }
}

@media (max-width: 480px) {
    /* Ultra Compact DNS Hero Section */
    .dns-hero {
        padding: var(--dns-space-6) 0 var(--dns-space-8) 0;
    }

    .dns-hero::after {
        height: 40px;
    }
    
    .dns-hero-title {
        font-size: 1.5rem;
        flex-direction: column;
        gap: var(--dns-space-2);
        margin-bottom: var(--dns-space-2);
    }

    .dns-hero-title i {
        font-size: 2rem;
    }
    
    .dns-hero-subtitle {
        font-size: 0.875rem;
        line-height: 1.4;
    }

    .dns-hero-features {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: var(--dns-space-2);
        margin-top: var(--dns-space-5);
        margin-bottom: var(--dns-space-2);
        max-width: 100%;
        padding: 0 var(--dns-space-3);
    }

    .dns-feature-badge {
        padding: var(--dns-space-2) var(--dns-space-2);
        font-size: 0.7rem;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: var(--dns-space-1);
        text-align: center;
        line-height: 1.3;
        min-height: 60px;
    }

    .dns-feature-badge i {
        font-size: 1rem;
        display: block;
    }

    .dns-feature-badge span {
        display: block;
        max-width: 100%;
        word-wrap: break-word;
    }
    
    .dns-check-card {
        padding: var(--dns-space-5);
        margin-top: calc(-1 * var(--dns-space-4));
        border-radius: var(--dns-radius-lg);
    }

    .dns-check-section {
        padding-top: var(--dns-space-3);
    }
    
    .dns-check-title {
        font-size: 1.25rem;
        margin-bottom: var(--dns-space-6);
    }

    .dns-world-map {
        height: 300px;
    }

    .dns-map-section {
        padding: var(--dns-space-4);
    }

    .dns-lists-section {
        padding: var(--dns-space-4);
    }
    
    .dns-action-btn {
        width: 44px;
        height: 44px;
        min-width: 44px;
        min-height: 44px;
    }
    
    .dns-server-row {
        padding: var(--dns-space-3);
        padding-top: var(--dns-space-5);
    }
    
    .dns-flag {
        font-size: 1.5rem;
    }
    
    .dns-location-name {
        font-size: 0.8125rem;
    }
    
    .dns-server-provider {
        font-size: 0.8125rem;
    }
    
    .dns-result-value {
        font-size: 0.75rem;
    }
}

/* Print Styles */
@media print {
    .dns-hero,
    .dns-actions,
    .dns-expected-section,
    .dns-export-section,
    .dns-copy-btn,
    .header,
    .footer,
    .dns-lists-section {
        display: none;
    }
    
    .dns-check-card {
        box-shadow: none;
        border: 1px solid #000;
    }
    
    .dns-server-row {
        page-break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ccc;
    }
}