:root {
    --background: hsl(220, 25%, 6%);
    --foreground: hsl(210, 20%, 98%);
    --card: hsl(220, 20%, 10%);
    --primary: hsl(165, 80%, 45%);
    --secondary: hsl(220, 15%, 14%);
    --muted-foreground: hsl(220, 10%, 55%);
    --border: hsl(220, 15%, 18%);
    --font-mono: 'JetBrains Mono', monospace;
    --font-sans: 'Inter', system-ui, sans-serif;
}

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

html {
    overflow-x: hidden;
}

body {
    font-family: var(--font-sans);
    background: var(--background);
    color: var(--foreground);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem 1rem;
    -webkit-font-smoothing: antialiased;
    position: relative;
    overflow-x: hidden;
}

/* Background layers */
.bg-gradient {
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at top, hsl(220, 15%, 14%, 0.4), var(--background), var(--background));
    pointer-events: none;
}

.bg-dots {
    position: absolute;
    inset: 0;
    background-image: url("data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iNjAiIGhlaWdodD0iNjAiIHZpZXdCb3g9IjAgMCA2MCA2MCIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIj48ZyBmaWxsPSJub25lIiBmaWxsLXJ1bGU9ImV2ZW5vZGQiPjxnIGZpbGw9IiMyMDIwMjAiIGZpbGwtb3BhY2l0eT0iMC4xNSI+PGNpcmNsZSBjeD0iMSIgY3k9IjEiIHI9IjEiLz48L2c+PC9nPjwvc3ZnPg==");
    opacity: 0.5;
    pointer-events: none;
}

.bg-glow {
    position: absolute;
    top: 33%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 500px;
    height: 300px;
    background: hsl(165, 80%, 45%, 0.08);
    border-radius: 50%;
    filter: blur(100px);
    pointer-events: none;
}

main {
    position: relative;
    z-index: 10;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2.5rem;
    text-align: center;
    width: 100%;
    max-width: 42rem;
}

/* Header */
header {
    animation: fadeIn 0.6s ease-out forwards;
}

header h1 {
    font-family: var(--font-mono);
    font-size: clamp(1.5rem, 4vw, 1.875rem);
    font-weight: 600;
    letter-spacing: -0.025em;
}

header h1 .primary {
    color: var(--primary);
}

header p {
    font-size: 0.875rem;
    color: var(--muted-foreground);
    margin-top: 0.5rem;
}

/* Card */
.card-wrapper {
    animation: fadeInUp 0.7s ease-out forwards;
}

.card {
    background: var(--card);
    border-radius: 1rem;
    padding: 2rem;
    box-shadow: 0 0 0 1px var(--border),
    0 4px 24px -4px hsl(165, 80%, 45%, 0.08),
    0 20px 50px -12px hsl(0, 0%, 0%, 0.5);
    transition: box-shadow 0.3s ease, transform 0.2s ease;
    cursor: pointer;
}

.card:hover {
    box-shadow: 0 0 0 1px hsl(165, 80%, 45%, 0.3),
    0 4px 24px -4px hsl(165, 80%, 45%, 0.15),
    0 20px 50px -12px hsl(0, 0%, 0%, 0.5);
    transform: scale(1.01);
}

.card:active {
    transform: scale(0.99);
}

.ip-display {
    font-family: var(--font-mono);
    font-size: clamp(1.875rem, 6vw, 3.75rem);
    font-weight: 600;
    letter-spacing: -0.025em;
    background: linear-gradient(to right, var(--primary), hsl(160, 80%, 60%), hsl(175, 75%, 65%));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    user-select: none;
}

.copy-hint {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--muted-foreground);
    margin-top: 1rem;
}

/* Badge */
.badge {
    display: flex;
    justify-content: center;
    margin-top: 1.5rem;
}

.badge span {
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: hsl(220, 10%, 55%, 0.5);
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    border: 1px solid hsl(220, 15%, 18%, 0.5);
}

/* CLI usage */
.cli-usage {
    margin-top: 1rem;
    animation: fadeIn 0.6s ease-out 0.3s both;
}

.cli-usage p {
    font-size: 0.75rem;
    color: var(--muted-foreground);
    margin-bottom: 0.5rem;
}

.cli-usage code {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--muted-foreground);
    background: var(--secondary);
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    border: 1px solid var(--border);
    display: inline-block;
    cursor: pointer;
    transition: border-color 0.2s ease, transform 0.2s ease;
}

.cli-usage code:hover {
    border-color: var(--primary);
    transform: scale(1.03);
}

.cli-usage code:active {
    transform: scale(0.98);
}

.cli-usage code .prompt {
    color: var(--primary);
    user-select: none;
    padding-right: 0.5em;
}

.cli-usage code .url {
    color: var(--foreground);
}

/* Footer */
footer {
    position: absolute;
    bottom: 1.5rem;
    left: 1.5rem;
    right: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.75rem;
    color: hsl(220, 10%, 55%, 0.4);
    animation: fadeIn 0.6s ease-out 0.4s both;
}

footer a {
    color: inherit;
}

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

/* Error state */
.error {
    color: hsl(0, 84%, 60%);
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(24px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 640px) {
    .card {
        padding: 2rem 1.5rem;
    }

    footer {
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
    }
}