/* ==========================================================================
   IP Checker — Terminal Green
   Monospace, phosphor-green on near-black, faint scanlines. No web fonts, no
   backdrop-filter — everything renders from system fonts and cheap paints.
   ========================================================================== */

:root {
    --bg-solid: #050805;
    --bg: radial-gradient(ellipse at center, #0a1a0a 0%, #050805 100%);

    --font: 'Courier New', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

    --text: #7dffa0;
    --muted: #3f8f57;
    --heading: #33ff66;
    --label: #5fdc86;

    --card-bg: rgba(6, 24, 8, 0.72);
    --card-border: 1px solid #1f6f2f;
    --card-radius: 6px;
    --card-shadow: 0 0 24px rgba(51, 255, 102, 0.12);
    --divider: rgba(51, 255, 102, 0.18);
    --heading-underline: 1px solid rgba(51, 255, 102, 0.35);

    --ip-bg: rgba(0, 0, 0, 0.55);
    --ip-border: 1px solid rgba(51, 255, 102, 0.4);

    --accent-1: #1f6f2f;
    --accent-2: #33ff66;
    --accent-text: #041007;
    --accent-glow: rgba(51, 255, 102, 0.35);

    --glow: 0 0 6px rgba(51, 255, 102, 0.5);
}

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

body {
    font-family: var(--font);
    background: var(--bg-solid);
    background-image: var(--bg);
    background-attachment: fixed;
    min-height: 100vh;
    color: var(--text);
    line-height: 1.6;
}

/* Scanline overlay — one cheap fixed layer, painted behind the content */
body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    background: repeating-linear-gradient(0deg,
        rgba(51, 255, 102, 0.06) 0 1px, transparent 1px 3px);
}

.container {
    position: relative;
    z-index: 1;
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* ---- Cards -------------------------------------------------------------- */
.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 25px;
    margin-bottom: 40px;
}

.main-ip-card {
    max-width: 600px;
    margin: 0 auto 40px auto;
}

.info-card {
    background: var(--card-bg);
    border: var(--card-border);
    border-radius: var(--card-radius);
    padding: 30px;
    box-shadow: var(--card-shadow);
    transition: transform 0.2s ease;
}

.info-card:hover { transform: translateY(-4px); }

.compact-card { padding: 25px; }
.compact-card .info-item { margin-bottom: 16px; padding: 8px 0; }

.info-card h2 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--heading);
    border-bottom: var(--heading-underline);
    padding-bottom: 12px;
    text-shadow: var(--glow);
    letter-spacing: 0.03em;
}

/* ---- IP block ----------------------------------------------------------- */
.ip-display {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 15px;
    padding: 15px;
    background: var(--ip-bg);
    border: var(--ip-border);
    border-radius: 6px;
    gap: 12px;
}

.ip-address {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--accent-2);
    text-shadow: var(--glow);
    overflow-wrap: anywhere;
}

.ip-details { display: flex; flex-direction: column; gap: 8px; }

.detail-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 6px 0;
    border-bottom: 1px solid var(--divider);
    gap: 12px;
}

.detail-item:last-child { border-bottom: none; }
.detail-label { font-weight: 600; color: var(--label); font-size: 0.9rem; }

/* ---- Info rows ---------------------------------------------------------- */
.info-item {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 18px;
    padding: 10px 0;
    border-bottom: 1px solid var(--divider);
    min-height: 24px;
}

.info-item:last-child { margin-bottom: 0; border-bottom: none; }

.info-item label {
    font-weight: 600;
    color: var(--label);
    min-width: 150px;
    margin-right: 20px;
    font-size: 0.95rem;
}

.info-item span {
    flex: 1;
    min-width: 0;
    color: var(--text);
    overflow-wrap: anywhere;
    text-align: right;
    font-size: 0.95rem;
    line-height: 1.4;
    cursor: pointer;
    padding: 2px 4px;
    border-radius: 4px;
    transition: background-color 0.2s ease;
}

/* Location / ISP values wrap on word boundaries, not mid-token */
.detail-item span { overflow-wrap: anywhere; min-width: 0; }

.info-item span:hover { background-color: rgba(51, 255, 102, 0.12); }
.info-item span:active { background-color: rgba(51, 255, 102, 0.2); }

/* ---- Buttons ------------------------------------------------------------ */
.copy-btn,
.refresh-btn {
    cursor: pointer;
    font-family: var(--font);
    font-weight: 600;
    color: var(--accent-text);
    background: linear-gradient(135deg, var(--accent-1) 0%, var(--accent-2) 100%);
    border: none;
    border-radius: 4px;
    box-shadow: 0 0 10px var(--accent-glow);
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.copy-btn { padding: 8px 16px; font-size: 0.9rem; white-space: nowrap; }
.refresh-btn { padding: 12px 24px; font-size: 1rem; }

.copy-btn:hover,
.refresh-btn:hover { transform: translateY(-1px); box-shadow: 0 0 16px var(--accent-glow); }
.copy-btn:active,
.refresh-btn:active { transform: translateY(0); }

.copy-btn.copied { animation: copySuccess 0.6s ease; }

@keyframes copySuccess {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

/* ---- Loading state ------------------------------------------------------ */
.loading {
    color: var(--muted);
    font-style: italic;
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* ---- Footer ------------------------------------------------------------- */
.footer {
    text-align: center;
    color: var(--accent-2);
    border: 1px solid var(--divider);
    border-radius: 6px;
    padding: 20px;
    margin-top: 20px;
    text-shadow: var(--glow);
}

.footer p { margin-bottom: 15px; }

.footer-buttons { display: flex; gap: 12px; justify-content: center; }

/* ---- Accessibility ------------------------------------------------------ */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ---- Responsive --------------------------------------------------------- */
@media (max-width: 768px) {
    .container { padding: 20px; }
    .main-ip-card { padding: 25px; }
    .info-grid { grid-template-columns: 1fr; gap: 20px; }
    .info-card { padding: 25px; }
    .compact-card { padding: 20px; }

    .info-item { flex-direction: column; align-items: flex-start; margin-bottom: 20px; padding: 12px 0; }
    .info-item label { margin-bottom: 8px; min-width: auto; font-size: 1rem; }
    .info-item span { text-align: left; font-size: 1rem; }

    .ip-display { flex-direction: column; gap: 12px; align-items: stretch; padding: 20px; }
    .ip-address { font-size: 1.3rem; text-align: center; }
    .copy-btn { align-self: center; min-width: 140px; padding: 10px 20px; font-size: 1rem; }
    .footer { padding: 25px; }
}

/* ---- Nerd Statistics (collapsible) ------------------------------------- */
.nerd-stats {
    margin-bottom: 20px;
    border: var(--card-border);
    border-radius: var(--card-radius);
    background: var(--card-bg);
    box-shadow: var(--card-shadow);
    overflow: hidden;
}

.nerd-stats > summary {
    cursor: pointer;
    padding: 16px 20px;
    color: var(--heading);
    font-weight: 700;
    letter-spacing: 0.03em;
    text-shadow: var(--glow);
    list-style: none;
    user-select: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nerd-stats > summary::-webkit-details-marker { display: none; }

.nerd-stats > summary::after {
    content: '▸';
    transition: transform 0.2s ease;
}

.nerd-stats[open] > summary::after { transform: rotate(90deg); }

.nerd-body { padding: 0 20px 12px; }

.nerd-section { margin-top: 18px; }

.nerd-section h3 {
    font-size: 0.85rem;
    color: var(--label);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 6px;
    padding-bottom: 6px;
    border-bottom: 1px solid var(--divider);
    opacity: 0.9;
}

.nerd-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    column-gap: 28px;
}

.nerd-grid .info-item { margin-bottom: 0; }

.nerd-note {
    margin-top: 12px;
    font-size: 0.8rem;
    line-height: 1.5;
    color: var(--muted);
}

@media (prefers-reduced-motion: reduce) {
    * { animation: none !important; transition: none !important; }
}