:root {
    --text: #e8edfb;
    --muted: #9aa6c4;
    --accent: #38bdf8;
    --accent2: #a78bfa;
    --accent3: #f472b6;
    --glass-bg: rgba(255, 255, 255, 0.06);
    --glass-bg-strong: rgba(255, 255, 255, 0.09);
    --glass-brd: rgba(255, 255, 255, 0.14);
    --radius: 18px;
    --blur: blur(14px) saturate(150%);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
    margin: 0;
    min-height: 100vh;
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    color: var(--text);
    background: #0a0e1f;
    position: relative;
    overflow-x: hidden;
    line-height: 1.6;
}

/* colorful aurora background */
body::before {
    content: "";
    position: fixed;
    inset: -25%;
    z-index: -2;
    background:
        radial-gradient(38% 40% at 12% 18%, rgba(56, 189, 248, 0.30), transparent 60%),
        radial-gradient(42% 44% at 88% 12%, rgba(167, 139, 250, 0.32), transparent 60%),
        radial-gradient(45% 45% at 78% 82%, rgba(244, 114, 182, 0.26), transparent 62%),
        radial-gradient(40% 42% at 18% 88%, rgba(45, 212, 191, 0.24), transparent 62%);
    filter: blur(28px);
    animation: drift 26s ease-in-out infinite alternate;
}
/* darkening veil so glass text stays readable */
body::after {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -1;
    background: linear-gradient(180deg, rgba(10, 14, 31, 0.25), rgba(10, 14, 31, 0.78));
}
@keyframes drift {
    from { transform: translate3d(0, 0, 0) scale(1); }
    to   { transform: translate3d(0, -3%, 0) scale(1.08); }
}
@media (prefers-reduced-motion: reduce) {
    body::before { animation: none; }
    html { scroll-behavior: auto; }
}

/* ---- header ---- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    display: flex;
    align-items: baseline;
    gap: 1rem;
    padding: 1rem 1.5rem;
    background: rgba(10, 14, 31, 0.55);
    backdrop-filter: var(--blur);
    -webkit-backdrop-filter: var(--blur);
    border-bottom: 1px solid var(--glass-brd);
}
.brand {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    text-decoration: none;
    background: linear-gradient(90deg, var(--accent), var(--accent2) 55%, var(--accent3));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.tagline { color: var(--muted); font-size: 0.9rem; }

.container { max-width: 760px; margin: 0 auto; padding: 2.5rem 1.5rem 1rem; }

h1 {
    margin-top: 0;
    font-size: clamp(2rem, 5vw, 2.9rem);
    line-height: 1.1;
    letter-spacing: -0.02em;
    background: linear-gradient(92deg, #ffffff, #d7defc 38%, var(--accent2));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
h2 { font-size: 1.25rem; }
.lead { color: var(--muted); font-size: 1.05rem; }
.hint { color: var(--muted); font-size: 0.9rem; margin: 0.25rem 0 0.75rem; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---- shared glass surface ---- */
.tool-card,
.assembled,
.part,
.info,
.stats li {
    background: var(--glass-bg);
    backdrop-filter: var(--blur);
    -webkit-backdrop-filter: var(--blur);
    border: 1px solid var(--glass-brd);
    border-radius: var(--radius);
}

/* ---- tool cards ---- */
.tool-list { list-style: none; padding: 0; display: grid; gap: 1.1rem; margin: 1.5rem 0; }
.tool-card {
    padding: 1.4rem 1.5rem;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}
.tool-card:hover {
    transform: translateY(-4px);
    background: var(--glass-bg-strong);
    border-color: rgba(56, 189, 248, 0.55);
    box-shadow: 0 18px 50px -18px rgba(56, 189, 248, 0.45);
}
.tool-card h2 { margin: 0 0 0.35rem; }
.tool-card h2 a {
    background: linear-gradient(90deg, var(--accent), var(--accent2));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.tool-card h2 a:hover { text-decoration: none; filter: brightness(1.15); }
.tool-card p { margin: 0; color: var(--muted); }

/* ---- forms ---- */
textarea,
input[type="text"] {
    width: 100%;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text);
    border: 1px solid var(--glass-brd);
    border-radius: 12px;
    padding: 0.8rem 1rem;
    font-family: ui-monospace, "Cascadia Code", monospace;
    font-size: 0.97rem;
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
textarea::placeholder,
input[type="text"]::placeholder { color: #6b7596; }
textarea:focus,
input[type="text"]:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.22);
}

.controls { display: flex; flex-wrap: wrap; align-items: center; gap: 1rem; margin: 0.85rem 0; }
.controls label { color: var(--muted); display: inline-flex; align-items: center; gap: 0.35rem; }
.controls input[type="radio"] { accent-color: var(--accent); }

button {
    background: linear-gradient(90deg, var(--accent), var(--accent2));
    color: #0a0e1f;
    border: none;
    border-radius: 12px;
    padding: 0.6rem 1.5rem;
    font-weight: 700;
    font-size: 0.97rem;
    cursor: pointer;
    box-shadow: 0 8px 22px -8px rgba(56, 189, 248, 0.65);
    transition: transform 0.15s ease, box-shadow 0.15s ease, filter 0.15s ease;
}
button:hover {
    transform: translateY(-2px);
    filter: brightness(1.08);
    box-shadow: 0 12px 30px -8px rgba(167, 139, 250, 0.75);
}
button:active { transform: translateY(0); }

/* ---- results ---- */
.result {
    margin-top: 0.5rem;
    padding: 1rem 1.1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-brd);
    border-radius: 12px;
    white-space: pre-wrap;
    word-break: break-all;
    font-family: ui-monospace, "Cascadia Code", monospace;
}
.error {
    display: inline-block;
    color: #fecaca;
    background: rgba(248, 113, 113, 0.12);
    border: 1px solid rgba(248, 113, 113, 0.35);
    border-radius: 10px;
    padding: 0.5rem 0.85rem;
}

/* ---- word counter stats ---- */
.stats { list-style: none; padding: 0; display: grid; gap: 0.6rem; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); }
.stats li { padding: 0.85rem 1rem; }
.stats li strong {
    display: block;
    font-size: 1.5rem;
    background: linear-gradient(90deg, var(--accent), var(--accent2));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

/* ---- domain inspector ---- */
.assembled {
    padding: 1.1rem 1.2rem;
    margin: 1rem 0 1.5rem;
    font-family: ui-monospace, "Cascadia Code", monospace;
    word-break: break-all;
    font-size: 1.08rem;
}
.seg { padding: 0 1px; }
.seg-protocol  { color: #f472b6; }
.seg-subdomain { color: #fbbf24; }
.seg-domain    { color: #38bdf8; font-weight: 700; }
.seg-tld       { color: #4ade80; font-weight: 700; }
.seg-ip        { color: #38bdf8; font-weight: 700; }
.seg-port      { color: #c084fc; }
.seg-path      { color: #94a3b8; }
.seg-query     { color: #fb923c; }
.seg-fragment  { color: #a78bfa; }

.parts { display: grid; gap: 0.6rem; }
.part { overflow: hidden; transition: border-color 0.15s ease, background 0.15s ease; }
.part:hover { border-color: rgba(167, 139, 250, 0.5); }
.part > summary {
    cursor: pointer;
    list-style: none;
    padding: 0.8rem 1.1rem;
    display: flex;
    align-items: baseline;
    gap: 0.75rem;
}
.part > summary::-webkit-details-marker { display: none; }
.part > summary::before { content: "\25B8"; color: var(--muted); font-size: 0.8rem; }
.part[open] > summary::before { content: "\25BE"; }
.part > summary .seg { font-family: ui-monospace, "Cascadia Code", monospace; }
.part-name {
    margin-left: auto;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--muted);
}
.part-desc { margin: 0; padding: 0 1.1rem 0.95rem 2.1rem; color: var(--text); }

/* ---- info / faq sections ---- */
.info { margin-top: 1.5rem; padding: 1.3rem 1.5rem; }
.info h2 { margin-top: 0; }
.info p { color: var(--text); }
.howto { color: var(--text); padding-left: 1.25rem; line-height: 1.8; }
.faq { display: grid; gap: 0.6rem; }
.faq-q { font-weight: 600; }
.faq .part > summary { color: var(--text); }

/* ---- footer ---- */
.site-footer {
    margin-top: 2.5rem;
    padding: 2rem 1.5rem;
    color: var(--muted);
    font-size: 0.85rem;
    text-align: center;
    border-top: 1px solid var(--glass-brd);
    background: rgba(10, 14, 31, 0.4);
    backdrop-filter: var(--blur);
    -webkit-backdrop-filter: var(--blur);
}