/* =========================================================================
   WhatIsMyIP Pro — theme
   Palette: deep navy background, slate surfaces, teal accent, amber warning
   ========================================================================= */

:root {
    --bg: #0b1120;
    --bg-alt: #0e1626;
    --surface: #131d31;
    --surface-2: #182338;
    --border: #23304b;
    --border-strong: #30425f;

    --fg: #e8eef7;
    --fg-muted: #9fb0c8;
    --fg-subtle: #6b7c98;

    --accent: #2dd4bf;
    --accent-strong: #14b8a6;
    --accent-ink: #05231f;

    --warn: #f6b352;
    --warn-ink: #3a2708;
    --ok: #4ade80;

    --radius: 14px;
    --radius-sm: 10px;
    --shadow: 0 20px 45px -20px rgba(2, 8, 20, 0.9);
    --maxw: 1120px;

    --font-sans: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
}

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

html {
    background: var(--bg);
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    font-family: var(--font-sans);
    color: var(--fg);
    background:
        radial-gradient(1100px 500px at 80% -10%, rgba(45, 212, 191, 0.10), transparent 60%),
        radial-gradient(900px 500px at 0% 0%, rgba(56, 100, 180, 0.10), transparent 55%),
        var(--bg);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
    width: 100%;
    max-width: var(--maxw);
    margin-inline: auto;
    padding-inline: 20px;
}

.mono { font-family: var(--font-mono); }

.skip-link {
    position: absolute;
    left: -9999px;
    top: 0;
    background: var(--accent);
    color: var(--accent-ink);
    padding: 10px 16px;
    border-radius: 0 0 10px 0;
    z-index: 100;
    font-weight: 600;
}
.skip-link:focus { left: 0; }

/* ------------------------------------------------------------------ header */
.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(11, 17, 32, 0.82);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 66px;
}
.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--fg);
    font-weight: 700;
    font-size: 1.05rem;
}
.brand:hover { text-decoration: none; }
.brand-mark {
    display: grid;
    place-items: center;
    width: 34px;
    height: 34px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--accent), var(--accent-strong));
    color: var(--accent-ink);
}

.site-nav { display: flex; align-items: center; }
.nav-menu {
    list-style: none;
    display: flex;
    gap: 6px;
    margin: 0;
    padding: 0;
}
.nav-menu a {
    display: block;
    padding: 8px 14px;
    border-radius: 8px;
    color: var(--fg-muted);
    font-weight: 500;
    font-size: 0.94rem;
}
.nav-menu a:hover { color: var(--fg); background: var(--surface); text-decoration: none; }
.nav-menu a[aria-current="page"] { color: var(--accent); background: var(--surface); }

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    width: 42px;
    height: 42px;
    padding: 10px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    cursor: pointer;
}
.nav-toggle span {
    display: block;
    height: 2px;
    background: var(--fg);
    border-radius: 2px;
    transition: transform .25s, opacity .25s;
}

/* -------------------------------------------------------------------- hero */
.hero {
    padding: 72px 0 40px;
    text-align: center;
}
.eyebrow {
    text-transform: uppercase;
    letter-spacing: 0.18em;
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--accent);
    margin: 0 0 14px;
}
.ip-display {
    display: inline-flex;
    align-items: center;
    gap: 14px;
    flex-wrap: wrap;
    justify-content: center;
    padding: 18px 26px;
    background: var(--surface);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}
.ip-value {
    font-family: var(--font-mono);
    font-size: clamp(1.6rem, 6vw, 3rem);
    font-weight: 700;
    margin: 0;
    color: var(--fg);
    letter-spacing: -0.01em;
    word-break: break-all;
}
.copy-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    border: 1px solid var(--accent-strong);
    background: transparent;
    color: var(--accent);
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: background .2s, color .2s;
    font-family: var(--font-sans);
}
.copy-btn:hover { background: var(--accent); color: var(--accent-ink); }
.copy-btn.copied { background: var(--ok); border-color: var(--ok); color: var(--accent-ink); }

.ip-badges {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
    margin: 22px 0 0;
}
.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: 999px;
    background: var(--surface-2);
    border: 1px solid var(--border);
    color: var(--fg-muted);
    font-size: 0.85rem;
    font-weight: 500;
}
.badge-accent { background: rgba(45, 212, 191, 0.12); border-color: var(--accent-strong); color: var(--accent); }
.badge-warn { background: rgba(246, 179, 82, 0.12); border-color: var(--warn); color: var(--warn); }

.hero-sub {
    max-width: 620px;
    margin: 26px auto 0;
    color: var(--fg-muted);
    font-size: 1.02rem;
    text-wrap: pretty;
}

/* ---------------------------------------------------------------- sections */
.section { padding: 46px 0; }
.section-alt { background: var(--bg-alt); border-block: 1px solid var(--border); }

/* ------------------------------------------------------------------- cards */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 18px;
}
.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 22px;
    box-shadow: var(--shadow);
}
.card-head {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--border);
}
.card-icon {
    display: grid;
    place-items: center;
    width: 38px;
    height: 38px;
    border-radius: 10px;
    background: rgba(45, 212, 191, 0.12);
    color: var(--accent);
    flex-shrink: 0;
}
.card-title { font-size: 1.05rem; margin: 0; font-weight: 600; color: var(--fg); }

.detail-list { margin: 0; display: grid; gap: 2px; }
.detail-list > div {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 9px 0;
    border-bottom: 1px dashed var(--border);
}
.detail-list > div:last-child { border-bottom: 0; }
.detail-list dt { color: var(--fg-subtle); font-size: 0.9rem; }
.detail-list dd {
    margin: 0;
    text-align: right;
    font-weight: 500;
    color: var(--fg);
    font-size: 0.94rem;
    overflow-wrap: anywhere;
}

.pill {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 999px;
    font-size: 0.8rem;
    font-weight: 600;
    background: var(--surface-2);
    border: 1px solid var(--border);
    color: var(--fg-muted);
}
.pill-ok { background: rgba(74, 222, 128, 0.12); border-color: var(--ok); color: var(--ok); }
.pill-warn { background: rgba(246, 179, 82, 0.14); border-color: var(--warn); color: var(--warn); }

/* --------------------------------------------------------------------- map */
.map-wrap { margin-top: 18px; padding: 22px; }
.map-frame {
    border-radius: var(--radius-sm);
    overflow: hidden;
    border: 1px solid var(--border-strong);
    aspect-ratio: 16 / 8;
    background: var(--surface-2);
}
.map-frame iframe { width: 100%; height: 100%; border: 0; display: block; }
.map-note { color: var(--fg-subtle); font-size: 0.85rem; margin: 12px 0 0; }

/* ------------------------------------------------------------------- prose */
.prose { max-width: 780px; }
.prose h2 { font-size: clamp(1.5rem, 3.5vw, 2rem); margin: 0 0 18px; letter-spacing: -0.01em; }
.prose h3 { font-size: 1.25rem; margin: 32px 0 10px; }
.prose p { color: var(--fg-muted); margin: 0 0 16px; }
.prose strong { color: var(--fg); }

.feature-list {
    list-style: none;
    padding: 0;
    margin: 18px 0;
    display: grid;
    gap: 10px;
}
.feature-list li {
    background: var(--surface);
    border: 1px solid var(--border);
    border-left: 3px solid var(--accent);
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    color: var(--fg-muted);
}

.cta-row { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 28px; }
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 22px;
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    border: 1px solid transparent;
    transition: transform .15s, background .2s, border-color .2s;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: var(--accent); color: var(--accent-ink); }
.btn-primary:hover { background: var(--accent-strong); }
.btn-ghost { background: transparent; border-color: var(--border-strong); color: var(--fg); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

/* --------------------------------------------------------------------- faq */
.faq { display: grid; gap: 12px; }
.faq details {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 4px 18px;
}
.faq summary {
    cursor: pointer;
    font-weight: 600;
    padding: 14px 0;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    color: var(--fg);
}
.faq summary::after {
    content: "+";
    font-size: 1.4rem;
    color: var(--accent);
    line-height: 1;
    transition: transform .2s;
}
.faq details[open] summary::after { transform: rotate(45deg); }
.faq summary::-webkit-details-marker { display: none; }
.faq details p { color: var(--fg-muted); margin: 0 0 16px; }

/* --------------------------------------------------------------- lookup ui */
.lookup-form {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin: 8px auto 0;
    max-width: 640px;
}
.lookup-form input[type="text"] {
    flex: 1 1 260px;
    padding: 14px 16px;
    background: var(--surface);
    border: 1px solid var(--border-strong);
    border-radius: 10px;
    color: var(--fg);
    font-size: 1rem;
    font-family: var(--font-mono);
}
.lookup-form input[type="text"]:focus {
    outline: 2px solid var(--accent);
    outline-offset: 1px;
}
.notice {
    padding: 14px 18px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--fg-muted);
    margin: 20px 0;
}
.notice-error { border-color: var(--warn); color: var(--warn); background: rgba(246,179,82,.08); }

/* ------------------------------------------------------------------ footer */
.site-footer {
    background: var(--bg-alt);
    border-top: 1px solid var(--border);
    margin-top: 20px;
    padding-top: 48px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.6fr 1fr 1fr 1fr;
    gap: 32px;
    padding-bottom: 36px;
}
.footer-desc { color: var(--fg-subtle); font-size: 0.9rem; margin: 14px 0 0; max-width: 320px; }
.footer-heading { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.12em; color: var(--fg-subtle); margin: 0 0 14px; }
.footer-col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.footer-col a { color: var(--fg-muted); font-size: 0.92rem; }
.footer-col a:hover { color: var(--accent); }
.footer-bottom {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 8px;
    padding: 20px 0 32px;
    border-top: 1px solid var(--border);
    color: var(--fg-subtle);
    font-size: 0.86rem;
}
.footer-bottom p { margin: 0; }

/* -------------------------------------------------------------- responsive */
@media (max-width: 760px) {
    .nav-toggle { display: flex; }
    .nav-menu {
        position: absolute;
        top: 66px;
        left: 0;
        right: 0;
        flex-direction: column;
        gap: 0;
        background: var(--bg-alt);
        border-bottom: 1px solid var(--border);
        padding: 10px 20px 18px;
        display: none;
    }
    .nav-menu.open { display: flex; }
    .nav-menu a { padding: 12px 8px; border-radius: 8px; }
    .site-nav { position: static; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .hero { padding: 48px 0 30px; }
}
@media (max-width: 460px) {
    .footer-grid { grid-template-columns: 1fr; }
    .detail-list > div { flex-direction: column; align-items: flex-start; gap: 2px; }
    .detail-list dd { text-align: left; }
}

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