:root {
    --bg: #0b1020;
    --bg-soft: #101831;
    --panel: #121a2f;
    --panel-soft: #17213a;
    --panel-strong: #1b2945;
    --text: #f7f9fc;
    --muted: #9aa7bd;
    --muted-strong: #c7d0df;
    --line: rgba(255, 255, 255, 0.11);
    --accent: #4ea1ff;
    --accent-dark: #2f86e9;
    --accent-alt: #46d39a;
    --accent-soft: rgba(78, 161, 255, 0.14);
    --danger: #ffb199;
    --success: #9ce6c8;
    --warning: #ffe0a3;
    --shadow: 0 20px 50px rgba(0, 0, 0, 0.26);
}

* {
    box-sizing: border-box;
}

html {
    min-height: 100%;
}

body {
    min-height: 100vh;
    margin: 0;
    background:
        radial-gradient(circle at 12% 0%, rgba(78, 161, 255, 0.18), transparent 34rem),
        radial-gradient(circle at 88% 4%, rgba(70, 211, 154, 0.13), transparent 30rem),
        var(--bg);
    color: var(--text);
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.5;
}

a {
    color: inherit;
}

a:focus-visible,
button:focus-visible,
input:focus-visible {
    outline: 3px solid rgba(78, 161, 255, 0.7);
    outline-offset: 3px;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 40;
    background: rgba(11, 16, 32, 0.88);
    border-bottom: 1px solid var(--line);
    backdrop-filter: blur(14px);
}

.site-header-inner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 14px 18px;
    width: min(100%, 1120px);
    margin: 0 auto;
    min-height: 68px;
    padding: 12px 16px;
}

.site-brand {
    display: inline-flex;
    align-items: center;
    min-height: 44px;
    color: var(--text);
    font-size: 1.18rem;
    font-weight: 900;
    line-height: 1;
    text-decoration: none;
    white-space: nowrap;
}

.site-brand span {
    color: var(--accent);
}

.site-nav {
    display: flex;
    flex-wrap: nowrap;
    gap: 8px;
    max-width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}

.site-nav::-webkit-scrollbar {
    display: none;
}

.site-nav a {
    display: inline-flex;
    align-items: center;
    flex: 0 0 auto;
    min-height: 40px;
    color: var(--muted-strong);
    padding: 9px 12px;
    border-radius: 999px;
    font-size: 0.94rem;
    font-weight: 700;
    line-height: 1.2;
    text-decoration: none;
    white-space: nowrap;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
    background: var(--accent-soft);
    color: var(--text);
}

@media (max-width: 679px) {
    .site-header {
        position: static;
    }

    .site-header-inner {
        align-items: flex-start;
        padding: 12px 14px;
    }

    .site-nav {
        width: 100%;
        padding-bottom: 4px;
    }

    .site-nav a[aria-current="page"] {
        order: -1;
    }
}

.site-footer {
    width: min(100%, 1120px);
    margin: 0 auto;
    padding: 0 16px 34px;
    color: var(--muted);
    text-align: center;
}

.site-footer p {
    margin: 0;
}

.page {
    width: min(100%, 1120px);
    margin: 0 auto;
    padding: 28px 16px 42px;
}

.tool-card,
.map-card,
.panel-card {
    width: 100%;
    background: linear-gradient(180deg, rgba(18, 26, 47, 0.98), rgba(23, 33, 58, 0.95));
    border: 1px solid var(--line);
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.tool-card {
    padding: 24px;
}

.tool-panel,
.result-panel {
    width: min(100%, 700px);
    margin-right: auto;
    margin-left: auto;
}

.result-panel {
    display: grid;
    gap: 18px;
}

.tool-header {
    margin-bottom: 22px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--line);
}

.eyebrow {
    margin: 0 0 8px;
    color: var(--accent);
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

h1,
h2,
h3 {
    margin: 0;
    letter-spacing: 0;
    line-height: 1.1;
}

h1 {
    font-size: clamp(2.15rem, 7vw, 4rem);
}

h2 {
    font-size: clamp(1.35rem, 5vw, 2rem);
}

h3 {
    font-size: 1.05rem;
}

.intro,
.accuracy-note,
.helper-text,
.tool-link-description {
    color: var(--muted);
}

.intro {
    max-width: 780px;
    margin: 14px 0 0;
    color: var(--muted-strong);
    font-size: clamp(1.02rem, 2vw, 1.12rem);
    line-height: 1.65;
}

.accuracy-note {
    margin: 16px 0 0;
    font-size: 0.94rem;
}

.hero-grid {
    display: grid;
    gap: 20px;
}

.tool-list {
    display: grid;
    gap: 16px;
}

.tool-link-card {
    display: grid;
    gap: 10px;
    min-height: 188px;
    padding: 20px;
    background: rgba(23, 33, 58, 0.86);
    border: 1px solid var(--line);
    border-radius: 8px;
    text-decoration: none;
    transition: border-color 0.2s ease, transform 0.2s ease, background-color 0.2s ease;
}

.tool-link-card:hover {
    background: var(--panel-strong);
    border-color: rgba(78, 161, 255, 0.55);
    transform: translateY(-2px);
}

.tool-link-title {
    font-size: 1.25rem;
    font-weight: 900;
    line-height: 1.15;
}

.tool-link-description {
    margin: 0;
}

.tool-link-action {
    align-self: end;
    color: var(--accent-alt);
    font-weight: 900;
}

.lookup-form {
    display: grid;
    gap: 14px;
    margin-top: 4px;
}

.lookup-form label {
    color: var(--muted-strong);
    font-size: 0.95rem;
    font-weight: 800;
}

.lookup-form input {
    width: 100%;
    min-height: 58px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 8px;
    background: #0c141f;
    color: var(--text);
    font-size: 1.15rem;
    padding: 14px 16px;
    outline: none;
}

.lookup-form input::placeholder {
    color: #738398;
}

.lookup-form input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 4px rgba(78, 161, 255, 0.18);
}

.lookup-form-compact {
    margin: 0;
    padding: 18px;
    background: rgba(12, 20, 31, 0.76);
    border: 1px solid var(--line);
    border-radius: 8px;
}

.quick-ports {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
}

.quick-port {
    display: grid;
    gap: 3px;
    min-height: 58px;
    padding: 10px 12px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--line);
    border-radius: 8px;
    color: var(--text);
    font-size: 1rem;
    line-height: 1.15;
}

.quick-port span {
    color: var(--muted);
    font-size: 0.78rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.quick-port:hover {
    background: rgba(78, 161, 255, 0.14);
    border-color: rgba(78, 161, 255, 0.34);
}

.button,
button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    min-height: 52px;
    border: 0;
    border-radius: 999px;
    background: linear-gradient(135deg, var(--accent), var(--accent-alt));
    color: #06101f;
    cursor: pointer;
    font-size: 1.05rem;
    font-weight: 800;
    text-decoration: none;
    transition: background-color 0.2s ease, transform 0.2s ease;
}

.button:hover,
button:hover {
    background: linear-gradient(135deg, var(--accent-dark), #35bd83);
    transform: translateY(-1px);
}

.button-secondary {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid var(--line);
    color: var(--text);
}

.button-secondary:hover {
    background: rgba(255, 255, 255, 0.13);
}

.feature-list {
    display: grid;
    gap: 12px;
    margin-top: 24px;
}

.feature-card,
.result-card {
    padding: 16px;
    background: rgba(23, 33, 58, 0.86);
    border: 1px solid var(--line);
    border-radius: 8px;
}

.feature-card p,
.result-card p {
    margin: 8px 0 0;
    color: var(--muted);
}

.trace-layout {
    display: grid;
    gap: 18px;
}

.map-card {
    padding: 16px;
}

.trace-layout .result-panel {
    width: 100%;
    max-width: none;
}

.map-header,
.results-header {
    display: grid;
    gap: 8px;
    margin-bottom: 16px;
}

#map {
    width: 100%;
    height: clamp(310px, 58vh, 540px);
    border: 1px solid var(--line);
    border-radius: 8px;
    overflow: hidden;
    background: #101a25;
}

.results {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
}

.dns-records {
    display: grid;
    gap: 14px;
}

.dns-record-group {
    display: grid;
    gap: 12px;
    padding: 16px;
    background: rgba(23, 33, 58, 0.86);
    border: 1px solid var(--line);
    border-radius: 8px;
}

.dns-record-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.dns-record-heading span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 34px;
    min-height: 34px;
    padding: 4px 9px;
    background: var(--accent-soft);
    border: 1px solid rgba(78, 161, 255, 0.28);
    border-radius: 8px;
    color: var(--muted-strong);
    font-weight: 900;
}

.dns-record-list {
    display: grid;
    gap: 8px;
}

.dns-record-row {
    display: grid;
    gap: 4px;
    padding: 12px;
    background: rgba(12, 20, 31, 0.76);
    border: 1px solid var(--line);
    border-radius: 8px;
    overflow-wrap: anywhere;
}

.whois-result {
    width: 100%;
    max-height: 620px;
    margin: 0;
    padding: 16px;
    overflow: auto;
    white-space: pre-wrap;
    overflow-wrap: anywhere;
    background: rgba(12, 20, 31, 0.76);
    border: 1px solid var(--line);
    border-radius: 8px;
    color: var(--muted-strong);
    font-family: Consolas, Monaco, 'Courier New', monospace;
    font-size: 0.9rem;
    line-height: 1.55;
}

.result-card {
    display: grid;
    gap: 8px;
    min-height: 94px;
    background: rgba(12, 20, 31, 0.76);
    box-shadow: 0 10px 26px rgba(0, 0, 0, 0.16);
}

.result-summary {
    display: grid;
    gap: 16px;
    align-items: center;
    padding: 18px;
    background: rgba(12, 20, 31, 0.76);
    border: 1px solid var(--line);
    border-radius: 8px;
}

.result-summary h2 {
    overflow-wrap: anywhere;
}

.result-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: fit-content;
    min-height: 42px;
    padding: 9px 14px;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 900;
}

.result-open {
    background: rgba(89, 214, 164, 0.16);
    border: 1px solid rgba(156, 230, 200, 0.5);
    color: var(--success);
}

.result-closed {
    background: rgba(255, 177, 153, 0.12);
    border: 1px solid rgba(255, 177, 153, 0.42);
    color: var(--danger);
}

.result-timeout {
    background: rgba(255, 224, 163, 0.14);
    border: 1px solid rgba(255, 224, 163, 0.42);
    color: var(--warning);
}

.result-detail {
    margin-top: 16px;
}

.result-label {
    color: var(--muted);
    font-size: 0.8rem;
    font-weight: 800;
    text-transform: uppercase;
}

.result-value {
    color: var(--text);
    font-size: 1.08rem;
    font-weight: 800;
    line-height: 1.32;
    overflow-wrap: anywhere;
}

.result-meta {
    color: var(--muted);
    font-size: 0.94rem;
}

.message {
    margin-top: 16px;
    padding: 14px 16px;
    background: rgba(255, 177, 153, 0.13);
    border: 1px solid rgba(255, 177, 153, 0.42);
    border-radius: 8px;
    color: var(--danger);
    font-weight: 700;
}

.message-neutral {
    background: rgba(255, 255, 255, 0.07);
    border-color: var(--line);
    color: var(--muted-strong);
}

.actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 20px;
}

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

@media (max-width: 559px) {
    .page {
        padding: 22px 14px 34px;
    }

    .tool-card {
        padding: 20px;
    }

    .tool-header {
        margin-bottom: 18px;
        padding-bottom: 18px;
    }

    h1 {
        font-size: clamp(2.05rem, 12vw, 2.75rem);
    }

    h2 {
        font-size: 1.42rem;
    }

    .lookup-form-compact {
        padding: 14px;
    }

    .lookup-form input {
        min-height: 54px;
        font-size: 1rem;
    }

    .quick-ports {
        gap: 8px;
    }

    .quick-port {
        min-height: 54px;
        padding: 9px 10px;
    }

    .feature-list {
        margin-top: 18px;
    }

    .map-card {
        padding: 14px;
    }

    #map {
        height: 320px;
    }
}

@media (min-width: 560px) {
    .quick-ports {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }

    .result-summary {
        grid-template-columns: auto 1fr;
    }
}

@media (min-width: 680px) {
    .site-header-inner {
        padding: 12px 24px;
    }

    .site-nav {
        flex-wrap: wrap;
        justify-content: flex-end;
        overflow-x: visible;
    }

    .site-footer {
        padding: 0 24px 38px;
    }

    .page {
        padding: 52px 24px;
    }

    .tool-card {
        padding: 32px;
    }

    .lookup-form-single {
        grid-template-columns: 1fr auto;
        align-items: end;
    }

    .lookup-form-single label,
    .lookup-form-single .helper-text {
        grid-column: 1 / -1;
    }

    .lookup-form-single button {
        width: auto;
        min-width: 160px;
        padding: 0 24px;
    }

    .button {
        width: auto;
        padding: 0 22px;
    }

    .feature-list,
    .results,
    .dns-records,
    .tool-list {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (min-width: 900px) {
    .hero-grid {
        grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
        align-items: start;
    }

    .trace-layout {
        grid-template-columns: minmax(0, 1.35fr) minmax(320px, 0.65fr);
        align-items: start;
    }
}