:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a25;
    --bg-glass: rgba(20, 20, 30, 0.7);
    --bg-glass-hover: rgba(30, 30, 45, 0.8);
    --text-primary: #ffffff;
    --text-secondary: #a0a0b0;
    --text-muted: #6a6a7a;
    --accent-primary: #6366f1;
    --accent-secondary: #8b5cf6;
    --accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a855f7 100%);
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --border-color: rgba(255, 255, 255, 0.08);
    --border-glow: rgba(99, 102, 241, 0.3);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 30px rgba(99, 102, 241, 0.2);
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 400ms ease;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

[data-theme="light"] {
    --bg-primary: #f5f5f7;
    --bg-secondary: #ffffff;
    --bg-tertiary: #e8e8ed;
    --bg-glass: rgba(255, 255, 255, 0.8);
    --bg-glass-hover: rgba(255, 255, 255, 0.9);
    --text-primary: #1a1a2e;
    --text-secondary: #4a4a5a;
    --text-muted: #8a8a9a;
    --border-color: rgba(0, 0, 0, 0.08);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
}

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

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

body {
    font-family: var(--font-family);
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.6;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(ellipse at 20% 20%, rgba(99, 102, 241, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(139, 92, 246, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(168, 85, 247, 0.04) 0%, transparent 70%);
    pointer-events: none;
    z-index: -1;
}

.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.logo-icon {
    width: 40px;
    height: 40px;
    color: var(--accent-primary);
    animation: pulse-glow 3s ease-in-out infinite;
}

@keyframes pulse-glow {

    0%,
    100% {
        filter: drop-shadow(0 0 8px rgba(99, 102, 241, 0.5));
    }

    50% {
        filter: drop-shadow(0 0 16px rgba(99, 102, 241, 0.8));
    }
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 600;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header-controls {
    display: flex;
    gap: var(--spacing-sm);
}

.btn-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.btn-icon:hover {
    background: var(--bg-glass-hover);
    color: var(--text-primary);
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-glow);
}

.btn-icon svg {
    width: 20px;
    height: 20px;
}

.icon-moon {
    display: none;
}

[data-theme="light"] .icon-sun {
    display: none;
}

[data-theme="light"] .icon-moon {
    display: block;
}

.main-content {
    display: grid;
    grid-template-columns: 320px 1fr;
    flex: 1;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
    max-width: 1600px;
    margin: 0 auto;
    width: 100%;
}

.sidebar {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.card {
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.card:hover {
    border-color: var(--border-glow);
    box-shadow: var(--shadow-glow);
    transform: translateY(-2px);
}

.card-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    background: rgba(255, 255, 255, 0.02);
}

.card-icon {
    font-size: 1.25rem;
}

.card-header h2 {
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
}

.card-body {
    padding: var(--spacing-md);
}

.location-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.location-flag {
    font-size: 2.5rem;
    line-height: 1;
}

.location-details {
    display: flex;
    flex-direction: column;
}

.location-country {
    font-size: 1.125rem;
    font-weight: 600;
}

.location-city {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.location-coords {
    display: flex;
    gap: var(--spacing-md);
    font-size: 0.75rem;
    color: var(--text-muted);
    font-family: 'SF Mono', Monaco, monospace;
    padding: var(--spacing-sm);
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    margin-top: var(--spacing-sm);
}

.optimal-server {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    margin-bottom: var(--spacing-sm);
}

.server-name {
    font-size: 1.25rem;
    font-weight: 600;
}

.server-ping {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.optimal-distance {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.server-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    max-height: 250px;
    overflow-y: auto;
    padding-right: var(--spacing-sm);
}

.server-list::-webkit-scrollbar {
    width: 4px;
}

.server-list::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
}

.server-list::-webkit-scrollbar-thumb {
    background: var(--accent-primary);
    border-radius: var(--radius-full);
}

.server-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 1px solid transparent;
}

.server-item:hover {
    background: var(--bg-glass-hover);
    border-color: var(--accent-primary);
    transform: translateX(4px);
}

.server-item.active {
    background: rgba(99, 102, 241, 0.2);
    border-color: var(--accent-primary);
}

.server-item-name {
    font-size: 0.875rem;
    font-weight: 500;
}

.server-item-ping {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--accent-primary);
}

.server-item-ping.good {
    color: var(--success);
}

.server-item-ping.medium {
    color: var(--warning);
}

.server-item-ping.bad {
    color: var(--danger);
}

.globe-container {
    position: relative;
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    overflow: hidden;
    min-height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.globe {
    width: 100%;
    height: 100%;
    min-height: 500px;
}

.globe-controls {
    position: absolute;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
}

.control-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 0.75rem;
    font-family: inherit;
    cursor: pointer;
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
}

.control-btn:hover {
    background: var(--bg-glass-hover);
    color: var(--text-primary);
}

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

.control-btn svg {
    width: 16px;
    height: 16px;
}

.server-tooltip {
    position: absolute;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    width: 240px;
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-normal);
    z-index: 10;
}

.server-tooltip.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.tooltip-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    background: rgba(255, 255, 255, 0.02);
}

.tooltip-icon {
    font-size: 1.25rem;
}

.tooltip-name {
    font-weight: 600;
}

.tooltip-body {
    padding: var(--spacing-md);
}

.tooltip-row {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-xs) 0;
    font-size: 0.875rem;
}

.tooltip-row span:first-child {
    color: var(--text-secondary);
}

.tooltip-row.highlight span:last-child {
    font-weight: 600;
    color: var(--accent-primary);
}

.tooltip-status {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--border-color);
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text-muted);
}

.status-dot.online {
    background: var(--success);
    box-shadow: 0 0 8px var(--success);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }
}

.footer {
    padding: var(--spacing-md) var(--spacing-xl);
    text-align: center;
    color: var(--text-muted);
    font-size: 0.75rem;
    border-top: 1px solid var(--border-color);
    background: var(--bg-glass);
}

.footer-privacy {
    margin-top: var(--spacing-sm);
    color: var(--success);
}

.privacy-banner {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1) 0%, rgba(99, 102, 241, 0.1) 100%);
    border-bottom: 1px solid rgba(16, 185, 129, 0.3);
    padding: var(--spacing-sm) var(--spacing-xl);
}

.privacy-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    max-width: 1600px;
    margin: 0 auto;
}

.privacy-icon {
    font-size: 1.25rem;
}

.privacy-content p {
    flex: 1;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin: 0;
}

.privacy-content strong {
    color: var(--success);
}

.privacy-close {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1rem;
    cursor: pointer;
    padding: var(--spacing-xs);
    transition: color var(--transition-fast);
}

.privacy-close:hover {
    color: var(--text-primary);
}

.btn-primary,
.btn-secondary {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal);
}

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

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.4);
}

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

.btn-secondary:hover:not(:disabled) {
    background: var(--bg-glass-hover);
    border-color: var(--accent-primary);
}

.btn-primary:disabled,
.btn-secondary:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

.btn-primary.success,
.btn-secondary.success {
    background: var(--success);
    border-color: var(--success);
}

.btn-primary svg,
.btn-secondary svg {
    width: 18px;
    height: 18px;
}

.detect-btn {
    margin-top: var(--spacing-sm);
}

.speed-btn {
    margin-top: var(--spacing-md);
}

.speed-display {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
}

.speed-value {
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.speed-unit {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.speed-status {
    text-align: center;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: var(--spacing-sm);
}

.speed-progress {
    width: 100%;
    height: 6px;
    border-radius: var(--radius-full);
    margin-top: var(--spacing-sm);
    appearance: none;
    -webkit-appearance: none;
    display: none;
    overflow: hidden;
}

.speed-progress::-webkit-progress-bar {
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
}

.speed-progress::-webkit-progress-value {
    background: var(--accent-gradient);
    border-radius: var(--radius-full);
    transition: width 0.3s ease;
}

.speed-progress::-moz-progress-bar {
    background: var(--accent-gradient);
    border-radius: var(--radius-full);
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.loading-spinner.small {
    width: 18px;
    height: 18px;
    border-width: 2px;
}

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

.globe-loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    color: var(--text-secondary);
    font-size: 0.875rem;
    z-index: 5;
}

.server-list-placeholder {
    text-align: center;
    padding: var(--spacing-lg);
    color: var(--text-muted);
    font-size: 0.875rem;
}

@media (max-width: 1024px) {
    .main-content {
        grid-template-columns: 1fr;
    }

    .sidebar {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
    }

    .comparison-card {
        grid-column: span 2;
    }

    .globe-container {
        min-height: 400px;
        order: -1;
    }
}

@media (max-width: 640px) {
    .header {
        padding: var(--spacing-md);
    }

    .logo-text {
        font-size: 1rem;
    }

    .main-content {
        padding: var(--spacing-md);
        gap: var(--spacing-md);
    }

    .sidebar {
        grid-template-columns: 1fr;
    }

    .comparison-card {
        grid-column: span 1;
    }

    .globe-container {
        min-height: 350px;
    }

    .globe-controls {
        flex-direction: column;
        border-radius: var(--radius-md);
    }

    .server-tooltip {
        position: fixed;
        top: auto;
        bottom: 80px;
        left: var(--spacing-md);
        right: var(--spacing-md);
        width: auto;
    }

    .privacy-banner {
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .privacy-content {
        flex-wrap: wrap;
    }

    .privacy-content p {
        order: 1;
        width: 100%;
        margin-top: var(--spacing-xs);
    }

    .speed-value {
        font-size: 2rem;
    }
}

@media (pointer: coarse) {
    .server-item {
        padding: var(--spacing-md);
        min-height: 48px;
    }

    .control-btn {
        padding: var(--spacing-md);
        min-height: 44px;
    }

    .btn-primary,
    .btn-secondary {
        padding: var(--spacing-md);
        min-height: 48px;
    }
}

@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

@keyframes checkDraw {
    0% {
        stroke-dashoffset: 24;
    }

    100% {
        stroke-dashoffset: 0;
    }
}

@keyframes checkPop {
    0% {
        transform: scale(0.8);
        opacity: 0;
    }

    50% {
        transform: scale(1.2);
    }

    100% {
        transform: scale(1);
        opacity: 1;
    }
}

.loading-spinner {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: currentColor;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.loading-spinner.small {
    width: 16px;
    height: 16px;
    border-width: 2px;
}

.check-animated {
    animation: checkPop 0.4s ease-out forwards;
}

.check-animated path {
    stroke-dasharray: 24;
    stroke-dashoffset: 24;
    animation: checkDraw 0.4s ease-out 0.1s forwards;
}

.card {
    animation: fadeIn 0.5s ease backwards;
}

.card:nth-child(1) {
    animation-delay: 0.1s;
}

.card:nth-child(2) {
    animation-delay: 0.2s;
}

.card:nth-child(3) {
    animation-delay: 0.3s;
}

.card:nth-child(4) {
    animation-delay: 0.4s;
}

.footer {
    padding: var(--spacing-lg) var(--spacing-xl);
    text-align: center;
    color: var(--text-muted);
    font-size: 0.75rem;
    border-top: 1px solid var(--border-color);
    background: var(--bg-glass);
}

.footer-privacy {
    margin-top: var(--spacing-sm);
    color: var(--success);
}

.footer-credits {
    margin-top: var(--spacing-md);
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.footer-credits strong {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 600;
}