@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-card: #16161f;
    --bg-card-hover: #1c1c28;
    --bg-input: #1a1a26;
    --border-color: rgba(255, 255, 255, 0.06);
    --border-active: rgba(99, 102, 241, 0.5);
    --text-primary: #f0f0f5;
    --text-secondary: #8888a0;
    --text-muted: #55556a;
    --accent-primary: #6366f1;
    --accent-secondary: #818cf8;
    --accent-glow: rgba(99, 102, 241, 0.15);
    --success: #10b981;
    --success-bg: rgba(16, 185, 129, 0.08);
    --success-border: rgba(16, 185, 129, 0.2);
    --danger: #ef4444;
    --danger-bg: rgba(239, 68, 68, 0.08);
    --danger-border: rgba(239, 68, 68, 0.2);
    --warning: #f59e0b;
    --warning-bg: rgba(245, 158, 11, 0.08);
    --warning-border: rgba(245, 158, 11, 0.2);
    --gradient-1: linear-gradient(135deg, #6366f1, #8b5cf6, #a855f7);
    --gradient-2: linear-gradient(135deg, #6366f1 0%, #818cf8 100%);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 24px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 48px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.15);
}

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

html {
    scroll-behavior: smooth;
}

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

/* Animated background */
.bg-pattern {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    overflow: hidden;
}

.bg-pattern::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(ellipse at 20% 50%, rgba(99, 102, 241, 0.06) 0%, transparent 50%),
                radial-gradient(ellipse at 80% 20%, rgba(139, 92, 246, 0.05) 0%, transparent 50%),
                radial-gradient(ellipse at 50% 80%, rgba(168, 85, 247, 0.04) 0%, transparent 50%);
    animation: bgFloat 20s ease-in-out infinite;
}

@keyframes bgFloat {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    33% { transform: translate(2%, -2%) rotate(1deg); }
    66% { transform: translate(-1%, 1%) rotate(-1deg); }
}

/* Grid overlay */
.bg-pattern::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(rgba(255, 255, 255, 0.015) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
    background-size: 60px 60px;
}

.container {
    position: relative;
    z-index: 1;
    max-width: 840px;
    margin: 0 auto;
    padding: 40px 20px;
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 48px;
    position: relative;
}

.header-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--accent-glow);
    border: 1px solid rgba(99, 102, 241, 0.2);
    color: var(--accent-secondary);
    padding: 6px 16px;
    border-radius: 100px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-bottom: 24px;
}

.header-badge .dot {
    width: 6px;
    height: 6px;
    background: var(--accent-primary);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.8); }
}

.logo {
    font-size: 42px;
    font-weight: 900;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -1.5px;
    margin-bottom: 12px;
    line-height: 1.1;
}

.logo span {
    -webkit-text-fill-color: var(--text-primary);
}

.subtitle {
    color: var(--text-secondary);
    font-size: 16px;
    font-weight: 400;
    max-width: 440px;
    margin: 0 auto;
}

/* Language switcher */
.lang-switcher {
    position: absolute;
    top: 0;
    right: 0;
    display: flex;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.lang-btn {
    padding: 8px 14px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-family: 'Inter', sans-serif;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 5px;
}

.lang-btn:hover {
    color: var(--text-primary);
}

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

/* Search section */
.search-section {
    margin-bottom: 40px;
}

.search-box {
    position: relative;
    display: flex;
    align-items: center;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 6px;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
}

.search-box:focus-within {
    border-color: var(--border-active);
    box-shadow: var(--shadow-glow);
}

.search-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    color: var(--text-muted);
    flex-shrink: 0;
}

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

.search-input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    font-size: 15px;
    padding: 14px 0;
    min-width: 0;
}

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

.search-btn {
    flex-shrink: 0;
    background: var(--gradient-2);
    color: white;
    border: none;
    padding: 14px 32px;
    border-radius: var(--radius-md);
    font-family: 'Inter', sans-serif;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
}

.search-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.4);
}

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

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

.search-btn .spinner {
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
    display: none;
}

.search-btn.loading .spinner {
    display: block;
}

.search-btn.loading .btn-text {
    display: none;
}

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

/* Saved result banner */
.saved-banner {
    display: none;
    background: var(--bg-card);
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: var(--radius-md);
    padding: 16px 20px;
    margin-bottom: 24px;
    align-items: center;
    gap: 14px;
}

.saved-banner.visible {
    display: flex;
}

.saved-banner .banner-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    background: var(--accent-glow);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: var(--accent-secondary);
}

.saved-banner .banner-content {
    flex: 1;
    min-width: 0;
}

.saved-banner .banner-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 2px;
}

.saved-banner .banner-sub {
    font-size: 12px;
    color: var(--text-secondary);
}

.saved-banner .banner-timer {
    font-size: 13px;
    font-weight: 600;
    color: var(--accent-secondary);
    white-space: nowrap;
}

/* Results */
.results-container {
    display: none;
    animation: fadeUp 0.5s ease;
}

.results-container.visible {
    display: block;
}

@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Status hero */
.status-hero {
    text-align: center;
    padding: 40px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    margin-bottom: 20px;
    position: relative;
    overflow: hidden;
}

.status-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.status-hero.online::before {
    background: linear-gradient(90deg, transparent, var(--success), transparent);
}

.status-hero.offline::before {
    background: linear-gradient(90deg, transparent, var(--danger), transparent);
}

.status-hero.timeout::before {
    background: linear-gradient(90deg, transparent, var(--warning), transparent);
}

.status-icon {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    position: relative;
}

.status-icon svg {
    width: 32px;
    height: 32px;
    position: relative;
    z-index: 1;
}

.status-hero.online .status-icon {
    background: var(--success-bg);
    border: 2px solid var(--success-border);
    color: var(--success);
}

.status-hero.online .status-icon::after {
    content: '';
    position: absolute;
    inset: -6px;
    border-radius: 50%;
    background: rgba(16, 185, 129, 0.08);
    animation: statusPulse 2s ease-in-out infinite;
}

.status-hero.offline .status-icon {
    background: var(--danger-bg);
    border: 2px solid var(--danger-border);
    color: var(--danger);
}

.status-hero.timeout .status-icon {
    background: var(--warning-bg);
    border: 2px solid var(--warning-border);
    color: var(--warning);
}

@keyframes statusPulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.15); opacity: 0; }
}

.status-label {
    font-size: 28px;
    font-weight: 800;
    margin-bottom: 6px;
    letter-spacing: -0.5px;
}

.status-hero.online .status-label { color: var(--success); }
.status-hero.offline .status-label { color: var(--danger); }
.status-hero.timeout .status-label { color: var(--warning); }

.status-url {
    color: var(--text-secondary);
    font-size: 14px;
    word-break: break-all;
    margin-bottom: 4px;
}

.status-time {
    color: var(--text-muted);
    font-size: 12px;
}

/* Info grid */
.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 12px;
    margin-bottom: 20px;
}

.info-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 20px;
    transition: all 0.2s ease;
}

.info-card:hover {
    background: var(--bg-card-hover);
    border-color: rgba(255, 255, 255, 0.1);
}

.info-card .card-label {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.info-card .card-value {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.info-card .card-value.success { color: var(--success); }
.info-card .card-value.danger { color: var(--danger); }
.info-card .card-value.warning { color: var(--warning); }

.info-card .card-unit {
    font-size: 12px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-left: 2px;
}

/* Detail table */
.detail-section {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-bottom: 20px;
}

.detail-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.detail-header svg {
    width: 18px;
    height: 18px;
    color: var(--accent-secondary);
}

.detail-header h3 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

.detail-row {
    display: flex;
    padding: 14px 20px;
    border-bottom: 1px solid var(--border-color);
    transition: background 0.15s ease;
}

.detail-row:last-child {
    border-bottom: none;
}

.detail-row:hover {
    background: rgba(255, 255, 255, 0.02);
}

.detail-key {
    width: 180px;
    flex-shrink: 0;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
}

.detail-val {
    flex: 1;
    font-size: 13px;
    color: var(--text-primary);
    font-weight: 500;
    word-break: break-all;
}

/* Actions */
.actions-bar {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.action-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    border-radius: var(--radius-md);
    font-family: 'Inter', sans-serif;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    border: 1px solid var(--border-color);
    background: var(--bg-card);
    color: var(--text-primary);
    transition: all 0.2s ease;
}

.action-btn:hover {
    background: var(--bg-card-hover);
    border-color: rgba(255, 255, 255, 0.1);
    transform: translateY(-1px);
}

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

.action-btn.primary {
    background: var(--gradient-2);
    border-color: transparent;
    color: white;
}

.action-btn.primary:hover {
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.3);
}

.action-btn.success {
    background: var(--success-bg);
    border-color: var(--success-border);
    color: var(--success);
}

/* Toast notification */
.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 14px 24px;
    border-radius: var(--radius-md);
    font-size: 13px;
    font-weight: 500;
    z-index: 9999;
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 10px;
}

.toast.visible {
    transform: translateX(-50%) translateY(0);
}

.toast.success {
    border-color: var(--success-border);
}

.toast.error {
    border-color: var(--danger-border);
}

/* Footer */
.footer {
    text-align: center;
    margin-top: 60px;
    padding: 20px 0;
    color: var(--text-muted);
    font-size: 12px;
}

.footer a {
    color: var(--accent-secondary);
    text-decoration: none;
}

/* Visitor IP Badge */
.visitor-ip-badge {
    position: absolute;
    top: 0;
    left: 0;
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 6px 12px;
    cursor: pointer;
    transition: all 0.2s ease;
    z-index: 10;
}

.visitor-ip-badge:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-active);
    box-shadow: var(--shadow-sm);
}

.visitor-flag {
    font-size: 16px;
}

.visitor-ip-text {
    font-size: 13px;
    font-weight: 600;
    font-family: monospace;
    color: var(--text-primary);
}

/* IP Info Section (Modal) */
.ip-info-section {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -45%);
    width: 90%;
    max-width: 480px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    z-index: 1000;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.ip-info-section.visible {
    opacity: 1;
    visibility: visible;
    transform: translate(-50%, -50%);
}

/* Overlay Backdrop */
.ip-info-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.ip-info-backdrop.visible {
    opacity: 1;
    visibility: visible;
}

.ip-info-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    background: rgba(255, 255, 255, 0.02);
}

.ip-info-title-row {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--accent-secondary);
}

.ip-info-title-row h3 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
}

.ip-info-close {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    transition: color 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 4px;
}

.ip-info-close:hover {
    color: var(--danger);
}

.ip-info-search {
    display: flex;
    padding: 16px 20px;
    gap: 10px;
    border-bottom: 1px solid var(--border-color);
}

.ip-info-input {
    flex: 1;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 10px 14px;
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    font-size: 14px;
    outline: none;
    transition: border-color 0.2s ease;
}

.ip-info-input:focus {
    border-color: var(--border-active);
}

.ip-info-search-btn {
    background: var(--accent-primary);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    width: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background 0.2s ease;
}

.ip-info-search-btn:hover {
    background: var(--accent-secondary);
}

.ip-info-content {
    background: var(--bg-card);
}

/* Responsive */
@media (max-width: 640px) {
    .container {
        padding: 24px 16px;
    }
    
    .logo {
        font-size: 30px;
    }
    
    .lang-switcher {
        position: relative;
        margin-bottom: 20px;
        justify-content: center;
    }
    
    .search-box {
        flex-direction: column;
        padding: 12px;
        gap: 8px;
    }
    
    .search-icon {
        display: none;
    }
    
    .search-input {
        padding: 12px;
        width: 100%;
        text-align: center;
    }
    
    .search-btn {
        width: 100%;
        justify-content: center;
        padding: 14px;
    }
    
    .info-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .detail-key {
        width: 120px;
    }
    
    .status-hero {
        padding: 30px 16px;
    }
    
    .status-label {
        font-size: 22px;
    }
    
    .actions-bar {
        flex-direction: column;
    }
    
    .action-btn {
        justify-content: center;
    }
}