:root {
    --bg-color: #ffffff;
    --card-bg: #ffffff;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --accent-color: #0ea5e9;
    --accent-glow: rgba(14, 165, 233, 0.15);
    --success-color: #4ade80;
    --font-main: 'Inter', system-ui, -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-main);
    margin: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    overflow-x: hidden;
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(56, 189, 248, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(139, 92, 246, 0.08) 0%, transparent 40%);
}

.container {
    width: 90%;
    max-width: 1100px;
    padding: 2rem;
    z-index: 1;
}

header {
    text-align: center;
    margin-bottom: 3rem;
    animation: fadeInDown 0.8s ease-out;
}

h1 {
    font-size: 3rem;
    font-weight: 700;
    color: var(--text-secondary);
    margin: 0;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.ip-display-container {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid #e2e8f0;
    border-radius: 24px;
    padding: 3rem 2rem;
    text-align: center;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    margin-bottom: 3rem;
    position: relative;
    overflow: hidden;
    animation: zoomIn 0.6s ease-out;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.ip-display-container:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 40px var(--accent-glow);
    border-color: rgba(56, 189, 248, 0.3);
}

.ip-label {
    display: block;
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.ip-address {
    font-family: var(--font-mono);
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: 700;
    color: var(--text-primary);
    text-shadow: 0 0 20px var(--accent-glow);
    margin: 0;
    line-height: 1.1;
    cursor: pointer;
    position: relative;
}

.ip-address:hover {
    color: var(--accent-color);
}

.copy-hint {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 1rem;
    opacity: 0;
    transform: translateY(10px);
    transition: all 0.3s ease;
}

.ip-display-container:hover .copy-hint {
    opacity: 1;
    transform: translateY(0);
}

.details-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    width: 100%;
    animation: fadeInUp 1s ease-out 0.3s backwards;
}

.detail-card {
    background: var(--card-bg);
    border: 1px solid #e2e8f0;
    border-radius: 16px;
    padding: 1.5rem;
    transition: all 0.3s ease;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.detail-card:hover {
    background: #f8fafc;
    border-color: #cbd5e1;
    transform: translateY(-2px);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.detail-icon {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--accent-color);
}

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

.detail-value {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-primary);
    word-break: break-word;
}

.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--success-color);
    color: #064e3b;
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.9rem;
    box-shadow: 0 4px 12px rgba(74, 222, 128, 0.4);
    opacity: 0;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    z-index: 100;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

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

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

@keyframes zoomIn {
    from { opacity: 0; transform: scale(0.9); }
    to { opacity: 1; transform: scale(1); }
}