:root {
    --bg:        #1d2935;
    --bg-deep:   #151f2a;
    --panel:     #243447;
    --panel-alt: #1e2e3e;
    --border:    #2f4255;
    --border-hi: #3a5570;
    --teal:      #1aa3c8;
    --teal-light:#2ab0d4;
    --teal-glow: #4ec9e0;
    --teal-dim:  #0d6e88;
    --text:      #d8eaf3;
    --text-dim:  #8faec0;
    --text-mute: #4a6a82;
    --label:     #5b8aa8;
    --green:     #1cbf88;
    --red:       #e05a6a;
    --amber:     #d4a24a;
}

html[data-theme="light"] {
    --bg:        #f0f5f8;
    --bg-deep:   #e2ecf2;
    --panel:     #ffffff;
    --panel-alt: #f5f9fc;
    --border:    #c4d8e6;
    --border-hi: #9fbfd2;
    --teal:      #0d7a94;
    --teal-light:#1296b5;
    --teal-glow: #0b6278;
    --teal-dim:  #1aa3c8;
    --text:      #122030;
    --text-dim:  #2d5066;
    --text-mute: #6a92a8;
    --label:     #3c6e8a;
    --green:     #0d8f63;
    --red:       #c0394a;
    --amber:     #9e7218;
}

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

html { scroll-behavior: smooth; }

body {
    font-family: 'JetBrains Mono', monospace;
    background-color: var(--bg);
    color: var(--text);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.5;
}

/* ── Light mode background overrides ── */
html[data-theme="light"] body::before {
    background:
        linear-gradient(135deg, transparent 60%, rgba(13,122,148,.04) 100%),
        repeating-linear-gradient(
            0deg,
            transparent,
            transparent 39px,
            rgba(196,216,230,.5) 39px,
            rgba(196,216,230,.5) 40px
        ),
        repeating-linear-gradient(
            90deg,
            transparent,
            transparent 39px,
            rgba(196,216,230,.3) 39px,
            rgba(196,216,230,.3) 40px
        );
}

html[data-theme="light"] body::after {
    background: linear-gradient(
        148deg,
        rgba(13,122,148,.06) 0%,
        rgba(13,122,148,.02) 40%,
        transparent 70%
    );
}

/* ── Background geometry ── */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background:
        linear-gradient(135deg, transparent 60%, rgba(26,163,200,.04) 100%),
        repeating-linear-gradient(
            0deg,
            transparent,
            transparent 39px,
            rgba(47,66,85,.3) 39px,
            rgba(47,66,85,.3) 40px
        ),
        repeating-linear-gradient(
            90deg,
            transparent,
            transparent 39px,
            rgba(47,66,85,.15) 39px,
            rgba(47,66,85,.15) 40px
        );
    pointer-events: none;
    z-index: 0;
}

/* Diagonal accent shape */
body::after {
    content: '';
    position: fixed;
    top: -20%;
    right: -10%;
    width: 55vw;
    height: 120vh;
    background: linear-gradient(
        148deg,
        rgba(26,163,200,.07) 0%,
        rgba(26,163,200,.03) 40%,
        transparent 70%
    );
    clip-path: polygon(30% 0%, 100% 0%, 100% 100%, 0% 100%);
    pointer-events: none;
    z-index: 0;
}

.wrapper {
    position: relative;
    z-index: 1;
    max-width: 890px;
    margin: 0 auto;
    padding: 32px 20px 48px;
}

/* ── Header ── */
.site-header {
    display: flex;
    align-items: flex-start;
    gap: 18px;
    margin-bottom: 36px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border);
    position: relative;
}

.header-mark {
    width: 4px;
    height: 52px;
    background: linear-gradient(180deg, var(--teal-glow), var(--teal-dim));
    flex-shrink: 0;
    margin-top: 4px;
}

.header-text h1 {
    font-family: 'Barlow Condensed', sans-serif;
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: .04em;
    text-transform: uppercase;
    color: var(--text);
    line-height: 1.1;
}

.header-text h1 span {
    color: var(--teal);
}

.header-text p {
    font-size: .72rem;
    color: var(--text-mute);
    margin-top: 4px;
    letter-spacing: .12em;
    text-transform: uppercase;
}

.header-badge {
    margin-left: auto;
    font-size: .65rem;
    font-family: 'Barlow Condensed', sans-serif;
    font-weight: 500;
    letter-spacing: .14em;
    text-transform: uppercase;
    color: var(--teal);
    border: 1px solid var(--teal-dim);
    padding: 4px 10px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.header-badge::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--teal);
    border-radius: 50%;
    animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(26,163,200,.6); }
    50%       { opacity: .7; box-shadow: 0 0 0 4px rgba(26,163,200,0); }
}

/* ── Cards ── */
.cards-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 20px;
}

@media (max-width: 660px) {
    .cards-row { grid-template-columns: 1fr; }
}

.ip-card {
    background: var(--panel);
    border: 1px solid var(--border);
    position: relative;
    overflow: hidden;
    animation: card-in .5s ease both;
}

.ip-card.ipv6 { animation-delay: .1s; }

@keyframes card-in {
    from { opacity: 0; transform: translateY(12px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* Top accent line */
.ip-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--teal), transparent);
}

/* Corner notch */
.ip-card::after {
    content: '';
    position: absolute;
    bottom: 0; right: 0;
    width: 24px; height: 24px;
    background: var(--bg);
    clip-path: polygon(100% 0%, 100% 100%, 0% 100%);
}

.card-header {
    padding: 14px 18px 10px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 10px;
}

.card-proto {
    font-family: 'Barlow Condensed', sans-serif;
    font-size: .65rem;
    font-weight: 600;
    letter-spacing: .16em;
    text-transform: uppercase;
    color: var(--bg-deep);
    background: var(--teal);
    padding: 2px 8px;
    line-height: 1.6;
}

.card-title {
    font-family: 'Barlow Condensed', sans-serif;
    font-size: 1rem;
    font-weight: 500;
    letter-spacing: .06em;
    text-transform: uppercase;
    color: var(--text-dim);
}

/* ── Info table ── */
.info-grid {
    padding: 8px 0 14px;
}

.info-row {
    display: grid;
    grid-template-columns: 110px 1fr;
    align-items: baseline;
    gap: 8px;
    padding: 7px 18px;
    border-bottom: 1px solid rgba(47,66,85,.5);
    transition: background .15s;
}

.info-row:last-child { border-bottom: none; }

.info-row:hover { background: rgba(26,163,200,.04); }

.info-label {
    font-size: .68rem;
    font-weight: 500;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: var(--label);
    white-space: nowrap;
}

.info-value {
    font-size: .82rem;
    color: var(--text);
    word-break: break-all;
}

/* Loading shimmer */
@keyframes shimmer {
    0%   { background-position: -400px 0; }
    100% { background-position: 400px 0; }
}

.loading {
    display: inline-block;
    background: linear-gradient(
        90deg,
        var(--text-mute) 25%,
        var(--teal-dim) 50%,
        var(--text-mute) 75%
    );
    background-size: 400px 100%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: shimmer 1.6s infinite linear;
    font-style: italic;
    font-size: .78rem;
}

.error  { color: var(--red); font-size: .78rem; }
.success { color: var(--green); font-size: .78rem; }

/* ── Copy button ── */
.copy-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-mute);
    padding: 2px 4px;
    margin-left: 6px;
    vertical-align: middle;
    border-radius: 2px;
    transition: color .15s, background .15s;
    line-height: 1;
}

.copy-btn:hover { color: var(--teal); background: rgba(26,163,200,.1); }
.copy-btn.copied { color: var(--green); }

/* ── Button group ── */
.button-group {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
}

.btn {
    font-family: 'Barlow Condensed', sans-serif;
    font-size: .8rem;
    font-weight: 600;
    letter-spacing: .14em;
    text-transform: uppercase;
    border: none;
    cursor: pointer;
    padding: 10px 20px;
    transition: background .2s, color .2s, transform .1s;
    position: relative;
    overflow: hidden;
    flex: 1;
}

.btn::after {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(255,255,255,0);
    transition: background .2s;
}
.btn:hover::after { background: rgba(255,255,255,.06); }
.btn:active { transform: scale(.98); }

.btn-primary {
    background: var(--teal);
    color: var(--bg-deep);
}
.btn-primary:hover { background: var(--teal-light); }

.btn-secondary {
    background: transparent;
    color: var(--teal);
    border: 1px solid var(--teal-dim);
}
.btn-secondary:hover {
    background: rgba(26,163,200,.08);
    border-color: var(--teal);
}

/* ── IP Lookup ── */
.lookup-section {
    background: var(--panel);
    border: 1px solid var(--border);
    padding: 20px 24px;
    margin-bottom: 20px;
    position: relative;
}

.lookup-section::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--teal-glow), transparent);
}

.lookup-header {
    display: flex;
    align-items: baseline;
    gap: 12px;
    margin-bottom: 14px;
}

.lookup-title {
    font-family: 'Barlow Condensed', sans-serif;
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: var(--teal-glow);
}

.lookup-subtitle {
    font-size: .68rem;
    color: var(--text-mute);
    letter-spacing: .08em;
}

.lookup-input-row {
    display: flex;
    gap: 10px;
}

.lookup-input {
    flex: 1;
    font-family: 'JetBrains Mono', monospace;
    font-size: .82rem;
    background: var(--bg-deep);
    color: var(--text);
    border: 1px solid var(--border);
    padding: 10px 14px;
    outline: none;
    transition: border-color .2s, box-shadow .2s;
    min-width: 0;
}

.lookup-input::placeholder { color: var(--text-mute); }

.lookup-input:focus {
    border-color: var(--teal);
    box-shadow: 0 0 0 2px rgba(26,163,200,.12);
}

.lookup-btn { flex-shrink: 0; }

/* Result card */
#lookup-result { margin-top: 16px; }

.lookup-card {
    border: 1px solid var(--border);
    overflow: hidden;
    animation: card-in .3s ease both;
}

.lookup-card-header {
    background: var(--bg-deep);
    border-bottom: 1px solid var(--border);
    padding: 10px 18px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.lookup-card-ip {
    font-size: .9rem;
    color: var(--teal-glow);
    font-weight: 500;
    flex: 1;
    word-break: break-all;
}

.lookup-card-type {
    font-family: 'Barlow Condensed', sans-serif;
    font-size: .62rem;
    font-weight: 600;
    letter-spacing: .16em;
    text-transform: uppercase;
    color: var(--bg-deep);
    background: var(--teal-dim);
    padding: 2px 8px;
    flex-shrink: 0;
}

.lookup-toggle-raw {
    font-family: 'Barlow Condensed', sans-serif;
    font-size: .65rem;
    font-weight: 600;
    letter-spacing: .12em;
    text-transform: uppercase;
    color: var(--text-mute);
    background: none;
    border: 1px solid var(--border);
    padding: 3px 10px;
    cursor: pointer;
    transition: color .2s, border-color .2s;
    flex-shrink: 0;
}

.lookup-toggle-raw:hover { color: var(--teal); border-color: var(--teal-dim); }

.lookup-raw {
    display: none;
    background: var(--bg-deep);
    border-top: 1px solid var(--border);
    padding: 14px 18px;
    overflow-x: auto;
}

.lookup-raw.open { display: block; }

.lookup-raw code {
    font-family: 'JetBrains Mono', monospace;
    font-size: .73rem;
    color: var(--teal-glow);
    white-space: pre;
    line-height: 1.7;
}

.lookup-error {
    padding: 14px 18px;
    color: var(--red);
    font-size: .8rem;
    background: var(--bg-deep);
    border: 1px solid rgba(224,90,106,.25);
}

/* ── API Section ── */
.api-section {
    background: var(--panel);
    border: 1px solid var(--border);
    padding: 24px;
    margin-bottom: 20px;
    display: none;
    position: relative;
    animation: card-in .3s ease both;
}

.api-section::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--amber), transparent);
}

.api-section.visible { display: block; }

.api-section h3 {
    font-family: 'Barlow Condensed', sans-serif;
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: var(--amber);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.api-section h3::after {
    content: '';
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, var(--border), transparent);
}

.api-block { margin-bottom: 20px; }

.api-section h4 {
    font-family: 'Barlow Condensed', sans-serif;
    font-size: .8rem;
    font-weight: 600;
    letter-spacing: .15em;
    text-transform: uppercase;
    color: var(--text-dim);
    margin-bottom: 6px;
    padding-left: 10px;
    border-left: 2px solid var(--amber);
}

.api-description {
    font-size: .75rem;
    color: var(--text-mute);
    margin-bottom: 8px;
    line-height: 1.6;
}

.code-block {
    background: var(--bg-deep);
    border: 1px solid var(--border);
    border-left: 3px solid var(--teal-dim);
    padding: 12px 16px;
    overflow-x: auto;
    position: relative;
}

.code-block code {
    font-family: 'JetBrains Mono', monospace;
    font-size: .75rem;
    color: var(--teal-glow);
    white-space: pre;
    line-height: 1.7;
}

/* ── Map Section ── */
.map-section {
    background: var(--panel);
    border: 1px solid var(--border);
    margin-bottom: 20px;
    position: relative;
    overflow: hidden;
}

.map-section::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--teal-glow), transparent);
    z-index: 10;
    pointer-events: none;
}

.map-header {
    display: flex;
    align-items: baseline;
    gap: 12px;
    padding: 14px 20px 12px;
    border-bottom: 1px solid var(--border);
}

.map-title {
    font-family: 'Barlow Condensed', sans-serif;
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: var(--teal-glow);
}

.map-subtitle {
    font-size: .68rem;
    color: var(--text-mute);
    letter-spacing: .08em;
}

#ip-map {
    height: 300px;
    width: 100%;
    background: var(--bg-deep);
}

/* Leaflet overrides for dark theme */
.leaflet-container {
    background: var(--bg-deep);
    font-family: 'JetBrains Mono', monospace;
}

.leaflet-popup-content-wrapper {
    background: var(--panel);
    color: var(--teal-glow);
    border: 1px solid var(--border);
    border-radius: 2px;
    box-shadow: 0 4px 16px rgba(0,0,0,.5);
    font-size: .78rem;
    font-family: 'JetBrains Mono', monospace;
}

.leaflet-popup-tip {
    background: var(--panel);
}

.leaflet-popup-close-button {
    color: var(--text-mute) !important;
}

.leaflet-popup-close-button:hover {
    color: var(--teal) !important;
}

.leaflet-control-attribution {
    background: rgba(21,31,42,.85) !important;
    color: var(--text-mute) !important;
    font-size: .6rem !important;
}

.leaflet-control-attribution a {
    color: var(--teal-dim) !important;
}

.leaflet-control-zoom a {
    background: var(--panel) !important;
    color: var(--teal) !important;
    border-color: var(--border) !important;
}

.leaflet-control-zoom a:hover {
    background: var(--panel-alt) !important;
    color: var(--teal-glow) !important;
}

/* Custom marker */
.ip-map-marker {
    width: 18px;
    height: 18px;
    background: var(--teal);
    border: 2px solid var(--teal-glow);
    border-radius: 50%;
    box-shadow: 0 0 0 4px rgba(26,163,200,.2), 0 0 12px rgba(26,163,200,.5);
    animation: marker-pulse 2s ease-in-out infinite;
}

@keyframes marker-pulse {
    0%, 100% { box-shadow: 0 0 0 4px rgba(26,163,200,.2), 0 0 12px rgba(26,163,200,.5); }
    50%       { box-shadow: 0 0 0 8px rgba(26,163,200,.05), 0 0 20px rgba(26,163,200,.3); }
}

/* ── Footer ── */
.site-footer {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid var(--border);
    font-size: .65rem;
    color: var(--text-mute);
    letter-spacing: .1em;
    text-transform: uppercase;
}

.site-footer span { color: var(--teal-dim); }

/* ── Theme toggle ── */
.theme-toggle {
    background: none;
    border: 1px solid var(--border);
    color: var(--text-dim);
    cursor: pointer;
    padding: 6px 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color .2s, border-color .2s, background .2s;
    margin-left: 10px;
    flex-shrink: 0;
}

.theme-toggle:hover {
    color: var(--teal);
    border-color: var(--teal-dim);
    background: rgba(26,163,200,.08);
}

.theme-toggle svg { display: block; }

/* hide/show icons based on theme */
.theme-toggle .icon-moon { display: block; }
.theme-toggle .icon-sun  { display: none; }
html[data-theme="light"] .theme-toggle .icon-moon { display: none; }
html[data-theme="light"] .theme-toggle .icon-sun  { display: block; }

/* Leaflet light-mode overrides */
html[data-theme="light"] .leaflet-popup-content-wrapper {
    box-shadow: 0 4px 16px rgba(0,0,0,.15);
}

html[data-theme="light"] .leaflet-control-attribution {
    background: rgba(240,245,248,.9) !important;
}

html[data-theme="light"] .leaflet-control-zoom a:hover {
    background: var(--bg-deep) !important;
}

/* ── Responsive ── */
@media (max-width: 480px) {
    .header-text h1 { font-size: 1.5rem; }
    .header-badge   { display: none; }
    .button-group   { flex-direction: column; }
    .info-row       { grid-template-columns: 1fr; gap: 2px; }
    .info-label     { font-size: .62rem; }
}