/* ============================================================
   NetCheck — Vercel Design System
   ============================================================ */

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

:root {
    --bg: #ffffff;
    --bg-secondary: #fafafa;
    --bg-hover: #f5f5f5;
    --border: rgba(0, 0, 0, 0.08);
    --border-shadow: rgba(0, 0, 0, 0.08) 0px 0px 0px 1px;
    --text: #171717;
    --text-secondary: #666666;
    --text-muted: #888888;
    --accent: #0070f3;
    --accent-light: rgba(0, 112, 243, 0.08);
    --accent-hover: #0060df;
    --green: #00a63e;
    --green-bg: rgba(0, 166, 62, 0.08);
    --red: #e5484d;
    --red-bg: rgba(229, 72, 77, 0.08);
    --yellow: #ffb224;
    --yellow-bg: rgba(255, 178, 36, 0.08);
    --orange: #f76808;
    --purple: #8e4ec6;
    --cyan: #0090ff;
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --mono: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    --radius: 12px;
    --radius-sm: 8px;
    --radius-xs: 6px;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.08);
    --transition: 150ms ease;
    --transition-md: 250ms ease;
}

html.dark {
    --bg: #0a0a0a;
    --bg-secondary: #141414;
    --bg-hover: #1f1f1f;
    --border: rgba(255, 255, 255, 0.08);
    --border-shadow: rgba(255, 255, 255, 0.06) 0px 0px 0px 1px;
    --text: #ededed;
    --text-secondary: #a0a0a0;
    --text-muted: #696969;
    --accent: #3291ff;
    --accent-light: rgba(50, 145, 255, 0.12);
    --accent-hover: #52a8ff;
    --green: #50e3c2;
    --green-bg: rgba(80, 227, 194, 0.1);
    --red: #ff6b6b;
    --red-bg: rgba(255, 107, 107, 0.1);
    --yellow: #f5a623;
    --yellow-bg: rgba(245, 166, 35, 0.1);
    --orange: #ff8a4c;
    --purple: #b98ce0;
    --cyan: #52a8ff;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.5);
}

html.dark .hero h1 {
    background: linear-gradient(180deg, #fff 0%, #888 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

html.dark .btn-run {
    background: #ededed;
    color: #0a0a0a;
}

html.dark .btn-run:hover {
    box-shadow: 0 0 0 3px rgba(237, 237, 237, 0.3);
}

@keyframes btnPulseDark {
    0%, 100% { box-shadow: 0 0 0 0 rgba(237, 237, 237, 0.3); }
    50% { box-shadow: 0 0 0 6px rgba(237, 237, 237, 0); }
}

html.dark .btn-run {
    animation: btnPulseDark 2.5s ease-in-out infinite;
}

html.dark .btn-run:hover {
    animation: none;
}

html.dark .skeleton {
    background: linear-gradient(90deg, #1a1a1a 25%, #2a2a2a 50%, #1a1a1a 75%);
    background-size: 200% 100%;
}

html.dark header {
    background: rgba(10, 10, 10, 0.8);
}

html { scroll-behavior: smooth; }

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

/* ============================================================
   Header
   ============================================================ */

header {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px) saturate(180%);
    -webkit-backdrop-filter: blur(12px) saturate(180%);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
    height: 64px;
}

.header-inner {
    display: flex;
    align-items: center;
    height: 64px;
    gap: 24px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 16px;
    font-weight: 700;
    color: var(--text);
    text-decoration: none;
    flex-shrink: 0;
    letter-spacing: -0.02em;
}

.logo svg { color: var(--text); }

nav {
    flex: 1;
    display: flex;
    gap: 2px;
    justify-content: center;
}

.nav-link {
    padding: 6px 14px;
    border-radius: var(--radius-xs);
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition), background var(--transition);
}

.nav-link:hover {
    color: var(--text);
    background: var(--bg-hover);
}

.nav-link.active {
    color: var(--text);
    background: var(--bg-hover);
}

.btn-hamburger {
    display: none;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 8px 6px;
    flex-shrink: 0;
    flex-direction: column;
    gap: 5px;
    align-items: center;
    justify-content: center;
}

.btn-hamburger span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--text);
    border-radius: 1px;
    transition: all 0.25s ease;
    transform-origin: center;
}

.btn-hamburger.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.btn-hamburger.active span:nth-child(2) {
    opacity: 0;
}

.btn-hamburger.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

.btn-dark {
    background: transparent;
    color: var(--text-muted);
    border: 1px solid var(--border);
    padding: 6px 10px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    cursor: pointer;
    transition: all 0.2s ease;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-dark:hover {
    color: var(--text);
    border-color: var(--text);
}

html.dark .btn-dark .fa-moon::before {
    content: '\f185';
}

.btn-github {
    background: transparent;
    color: var(--text-muted);
    border: 1px solid var(--border);
    padding: 6px 10px;
    border-radius: var(--radius-sm);
    font-size: 15px;
    cursor: pointer;
    transition: all 0.2s ease;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
}

.btn-github:hover {
    color: var(--text);
    border-color: var(--text);
}

.btn-lang {
    background: transparent;
    color: var(--text-muted);
    border: 1px solid var(--border);
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: var(--font);
    letter-spacing: 0.5px;
    flex-shrink: 0;
}

.btn-lang:hover {
    color: var(--text);
    border-color: var(--text);
}

.btn-run {
    background: var(--text);
    color: #fff;
    border: none;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.2s ease;
    flex-shrink: 0;
    font-family: var(--font);
    position: relative;
    animation: btnPulse 2.5s ease-in-out infinite;
}

.btn-run:hover {
    animation: none;
    transform: scale(1.03);
    box-shadow: 0 0 0 3px rgba(0, 112, 243, 0.2);
}

.btn-run:active {
    transform: scale(0.97);
}

.btn-run.running {
    animation: none;
    opacity: 0.7;
    pointer-events: none;
}

.btn-radar {
    display: flex;
    align-items: center;
}

.btn-radar svg {
    animation: radarPulse 2s ease-in-out infinite;
}

@keyframes btnPulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(23, 23, 23, 0.3); }
    50% { box-shadow: 0 0 0 6px rgba(23, 23, 23, 0); }
}

@keyframes radarPulse {
    0% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.15); opacity: 0.7; }
    100% { transform: scale(1); opacity: 1; }
}

/* ============================================================
   Hero
   ============================================================ */

.hero {
    padding: 80px 0 60px;
    text-align: center;
    background: var(--bg);
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 400px;
    background: radial-gradient(ellipse, rgba(0, 112, 243, 0.06) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}

.hero > .container { position: relative; z-index: 1; }

.hero-badge {
    display: inline-block;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 500;
    color: var(--accent);
    background: var(--accent-light);
    margin-bottom: 20px;
    letter-spacing: 0.02em;
}

.hero h1 {
    font-size: 48px;
    font-weight: 800;
    letter-spacing: -0.04em;
    line-height: 1.1;
    margin-bottom: 16px;
    background: linear-gradient(180deg, #000 0%, #555 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 16px;
    color: var(--text-secondary);
    max-width: 560px;
    margin: 0 auto 36px;
    line-height: 1.7;
}

.hero-ip-card {
    display: inline-flex;
    align-items: center;
    gap: 32px;
    background: var(--bg);
    box-shadow: var(--border-shadow), var(--shadow-md);
    padding: 20px 36px;
    border-radius: var(--radius);
    transition: box-shadow var(--transition-md);
}

.hero-ip-card:hover {
    box-shadow: var(--border-shadow), var(--shadow-lg);
}

.hero-ip-left {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
}

.hero-ip-label {
    font-size: 12px;
    font-weight: 500;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.hero-ip-value {
    font-family: var(--mono);
    font-size: 24px;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.02em;
    min-width: 160px;
    min-height: 32px;
    display: flex;
    align-items: center;
}

.hero-ip-right {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    padding-left: 32px;
    border-left: 1px solid var(--border);
}

.hero-ip-loc {
    font-size: 15px;
    font-weight: 600;
    color: var(--text);
    min-height: 22px;
    display: flex;
    align-items: center;
}

.hero-ip-isp {
    font-size: 13px;
    color: var(--text-muted);
}

/* Skeleton */
.skeleton {
    display: inline-block;
    border-radius: var(--radius-xs);
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s ease-in-out infinite;
}

.skeleton-ip { width: 160px; height: 32px; }
.skeleton-loc { width: 120px; height: 22px; }

@keyframes shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* ============================================================
   Feature Cards
   ============================================================ */

.features {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin-top: -24px;
    position: relative;
    z-index: 10;
    padding-bottom: 40px;
}

.feature-card {
    background: var(--bg);
    box-shadow: var(--border-shadow);
    border-radius: var(--radius);
    padding: 24px 20px;
    text-decoration: none;
    color: var(--text);
    transition: box-shadow var(--transition-md), transform var(--transition-md);
    cursor: pointer;
    display: block;
}

.feature-card:hover {
    box-shadow: var(--border-shadow), var(--shadow-md);
    transform: translateY(-2px);
}

.feature-card:active {
    transform: translateY(0);
}

.feature-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    background: var(--accent-light);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    margin-bottom: 14px;
}

.feature-card h3 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 4px;
    letter-spacing: -0.01em;
}

.feature-card p {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.5;
}

/* ============================================================
   Progress Bar
   ============================================================ */

.progress-bar-container {
    padding: 0 0 20px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.progress-bar-track {
    flex: 1;
    height: 4px;
    background: var(--bg-hover);
    border-radius: 2px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    width: 0%;
    background: var(--accent);
    border-radius: 2px;
    transition: width 0.4s ease;
}

.progress-text {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
    font-family: var(--mono);
    min-width: 32px;
    text-align: right;
}

/* ============================================================
   Sections
   ============================================================ */

.section {
    background: var(--bg);
    box-shadow: var(--border-shadow);
    border-radius: var(--radius);
    margin-bottom: 16px;
    overflow: hidden;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
}

.section-header h2 {
    font-size: 15px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
    letter-spacing: -0.01em;
}

.section-header h2 i {
    color: var(--accent);
    font-size: 14px;
}

.badge {
    font-size: 12px;
    font-weight: 600;
    padding: 3px 10px;
    border-radius: 20px;
    background: var(--bg-hover);
    color: var(--text-muted);
    transition: all var(--transition);
}

.badge.running {
    background: var(--accent-light);
    color: var(--accent);
}

.badge.done {
    background: var(--green-bg);
    color: var(--green);
}

.badge.fail {
    background: var(--red-bg);
    color: var(--red);
}

/* ============================================================
   Detail Grid
   ============================================================ */

.detail-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
}

.detail-item {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    border-right: 1px solid var(--border);
    transition: background var(--transition);
}

.detail-item:hover {
    background: var(--bg-secondary);
}

.detail-item:nth-child(4n) { border-right: none; }
.detail-item:nth-last-child(-n+4) { border-bottom: none; }

.detail-item label {
    display: block;
    font-size: 11px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    font-weight: 500;
    margin-bottom: 4px;
}

.detail-item span {
    font-size: 14px;
    font-weight: 500;
    color: var(--text);
}

.mono {
    font-family: var(--mono);
    font-size: 13px !important;
    color: var(--accent) !important;
}

/* ============================================================
   Latency Table
   ============================================================ */

.latency-table { padding: 0; }

.latency-empty {
    padding: 40px 20px;
    text-align: center;
    color: var(--text-muted);
    font-size: 14px;
}

.lat-row {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    border-bottom: 1px solid var(--border);
    transition: background var(--transition);
}

.lat-row:last-child { border-bottom: none; }
.lat-row:hover { background: var(--bg-secondary); }

.lat-icon {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 700;
    flex-shrink: 0;
    overflow: hidden;
}

.lat-icon img {
    width: 20px;
    height: 20px;
    object-fit: contain;
    border-radius: 3px;
}

.lat-name {
    width: 120px;
    font-size: 13px;
    font-weight: 600;
    flex-shrink: 0;
    color: var(--text);
}

.lat-bar-wrap {
    flex: 1;
    height: 4px;
    background: var(--bg-hover);
    border-radius: 2px;
    overflow: hidden;
}

.lat-bar {
    height: 100%;
    border-radius: 2px;
    transition: width 0.6s ease;
    min-width: 2px;
}

.lat-bar.fast { background: var(--green); }
.lat-bar.medium { background: var(--yellow); }
.lat-bar.slow { background: var(--orange); }
.lat-bar.timeout { background: var(--red); }

.lat-value {
    width: 70px;
    text-align: right;
    font-family: var(--mono);
    font-size: 13px;
    font-weight: 600;
    flex-shrink: 0;
}

.lat-value.fast { color: var(--green); }
.lat-value.medium { color: var(--yellow); }
.lat-value.slow { color: var(--orange); }
.lat-value.timeout { color: var(--red); }

.lat-status {
    width: 24px;
    text-align: center;
    flex-shrink: 0;
    font-size: 12px;
}

/* ============================================================
   DNS Table
   ============================================================ */

.dns-table { padding: 0; }

.dns-row {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    border-bottom: 1px solid var(--border);
    transition: background var(--transition);
    font-size: 13px;
}

.dns-row:last-child { border-bottom: none; }
.dns-row:hover { background: var(--bg-secondary); }

.dns-domain {
    width: 140px;
    font-weight: 600;
    flex-shrink: 0;
    color: var(--text);
}

.dns-ips {
    flex: 1;
    font-family: var(--mono);
    font-size: 12px;
    color: var(--text-secondary);
    word-break: break-all;
}

.dns-time {
    width: 70px;
    text-align: right;
    font-family: var(--mono);
    font-size: 13px;
    font-weight: 600;
    flex-shrink: 0;
}

.dns-status {
    width: 24px;
    text-align: center;
    flex-shrink: 0;
    font-size: 12px;
}

/* ============================================================
   Leak Grid
   ============================================================ */

.leak-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
}

.leak-item {
    padding: 24px 20px;
    text-align: center;
    border-right: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    transition: background var(--transition);
}

.leak-item:hover { background: var(--bg-secondary); }
.leak-item:nth-child(3n) { border-right: none; }

.leak-item i {
    font-size: 24px;
    margin-bottom: 10px;
    color: var(--text-muted);
}

.leak-item h4 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 4px;
}

.leak-item .result {
    font-size: 13px;
    font-weight: 600;
    margin-top: 10px;
    padding: 4px 12px;
    border-radius: 20px;
    display: inline-block;
}

.leak-item .result.safe { background: var(--green-bg); color: var(--green); }
.leak-item .result.warn { background: var(--yellow-bg); color: var(--yellow); }
.leak-item .result.danger { background: var(--red-bg); color: var(--red); }
.leak-item .result.pending { background: var(--bg-hover); color: var(--text-muted); }

/* ============================================================
   Fingerprint Table
   ============================================================ */

.fingerprint-table { border-top: 1px solid var(--border); }

.fp-row {
    display: flex;
    padding: 10px 20px;
    border-bottom: 1px solid var(--border);
    font-size: 13px;
    transition: background var(--transition);
}

.fp-row:last-child { border-bottom: none; }
.fp-row:hover { background: var(--bg-secondary); }

.fp-label {
    width: 180px;
    color: var(--text-muted);
    flex-shrink: 0;
    font-weight: 500;
}

.fp-value {
    flex: 1;
    font-family: var(--mono);
    font-size: 12px;
    color: var(--text);
    word-break: break-all;
}

/* ============================================================
   Summary
   ============================================================ */

.summary-box { padding: 20px; }

.summary-empty {
    text-align: center;
    padding: 24px;
    color: var(--text-muted);
}

.summary-empty i {
    font-size: 24px;
    margin-bottom: 10px;
    display: block;
    opacity: 0.4;
}

.summary-empty p { font-size: 14px; }

.summary-row {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 6px 0;
    font-size: 14px;
}

.summary-row i {
    width: 18px;
    text-align: center;
    font-size: 13px;
}

.text-muted { color: var(--text-muted); }
.text-green { color: var(--green); }
.text-red { color: var(--red); }
.text-yellow { color: var(--yellow); }

.summary-actions {
    display: flex;
    justify-content: center;
    padding: 0 20px 20px;
    border-top: 1px solid var(--border);
    padding-top: 16px;
    margin-top: 8px;
}

.btn-copy {
    background: var(--bg-hover);
    color: var(--text-secondary);
    border: 1px solid var(--border);
    padding: 8px 20px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: var(--font);
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-copy:hover {
    color: var(--text);
    border-color: var(--text);
    background: var(--bg-secondary);
}

.btn-copy.copied {
    color: var(--green);
    border-color: var(--green);
    background: var(--green-bg);
}

/* ============================================================
   Toast
   ============================================================ */

.toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 8px;
    pointer-events: none;
}

.toast {
    background: var(--bg);
    color: var(--text);
    box-shadow: var(--border-shadow), var(--shadow-lg);
    border-radius: var(--radius-sm);
    padding: 12px 20px;
    font-size: 14px;
    font-weight: 500;
    font-family: var(--font);
    pointer-events: auto;
    animation: toastIn 0.3s ease, toastOut 0.3s ease 3.5s forwards;
    max-width: 360px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.toast i { font-size: 15px; }

.toast.warn i { color: var(--yellow); }
.toast.info i { color: var(--accent); }
.toast.error i { color: var(--red); }

@keyframes toastIn {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes toastOut {
    from { opacity: 1; transform: translateY(0); }
    to { opacity: 0; transform: translateY(-8px); }
}

/* ============================================================
   Footer
   ============================================================ */

footer {
    text-align: center;
    padding: 32px 0;
    color: var(--text-muted);
    font-size: 13px;
    border-top: 1px solid var(--border);
    margin-top: 20px;
}

/* ============================================================
   Animations
   ============================================================ */

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.section { animation: fadeIn 0.4s ease; }

/* ============================================================
   Responsive
   ============================================================ */

@media (max-width: 1024px) {
    .features { grid-template-columns: repeat(3, 1fr); }
    .detail-grid { grid-template-columns: repeat(3, 1fr); }
    .detail-item:nth-child(3n) { border-right: none; }
    .detail-item:nth-child(4n) { border-right: 1px solid var(--border); }
    .detail-item:nth-last-child(-n+3) { border-bottom: none; }
    .detail-item:nth-last-child(-n+4) { border-bottom: 1px solid var(--border); }
}

@media (max-width: 768px) {
    .hero h1 { font-size: 36px; }
    .hero { padding: 60px 0 40px; }
    .features { grid-template-columns: repeat(2, 1fr); }
    .detail-grid { grid-template-columns: repeat(2, 1fr); }
    .detail-item:nth-child(2n) { border-right: none; }
    .detail-item:nth-child(3n) { border-right: 1px solid var(--border); }
    .detail-item:nth-last-child(-n+2) { border-bottom: none; }
    .detail-item:nth-last-child(-n+3) { border-bottom: 1px solid var(--border); }
    .leak-grid { grid-template-columns: 1fr; }
    .leak-item { border-right: none; }
    .btn-hamburger { display: flex; }
    nav {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--bg);
        border-bottom: 1px solid var(--border);
        flex-direction: column;
        padding: 8px;
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: all 0.25s ease;
        z-index: 99;
        box-shadow: var(--shadow-lg);
    }
    nav.open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }
    nav .nav-link {
        padding: 12px 16px;
        font-size: 15px;
        border-radius: var(--radius-sm);
    }
    .hero-ip-card { flex-direction: column; gap: 16px; padding: 20px; }
    .hero-ip-right { border-left: none; padding-left: 0; border-top: 1px solid var(--border); padding-top: 16px; align-items: center; }
    .hero-ip-left { align-items: center; }
}

@media (max-width: 480px) {
    .hero h1 { font-size: 28px; }
    .features { grid-template-columns: 1fr; }
    .detail-grid { grid-template-columns: 1fr; }
    .detail-item { border-right: none; }
    .detail-item:last-child { border-bottom: none; }
    .lat-name { width: 90px; font-size: 12px; }
    .dns-domain { width: 100px; font-size: 12px; }
    .fp-label { width: 120px; font-size: 12px; }
    .fp-value { font-size: 11px; }
}

/* IP property tags */
.ip-tag {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.ip-tag.tag-dc { background: var(--yellow-bg); color: var(--yellow); }
.ip-tag.tag-proxy { background: var(--red-bg); color: var(--red); }
.ip-tag.tag-mobile { background: var(--accent-light); color: var(--accent); }
.ip-tag.tag-residential { background: var(--green-bg); color: var(--green); }

/* Geo sources table */
.geo-sources {
    padding: 0;
    border-top: 1px solid var(--border);
}

.geo-row {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 20px;
    border-bottom: 1px solid var(--border);
    font-size: 13px;
    transition: background var(--transition);
}

.geo-row:last-child { border-bottom: none; }
.geo-row:hover { background: var(--bg-secondary); }

.geo-source {
    width: 90px;
    color: var(--text-muted);
    font-weight: 500;
    flex-shrink: 0;
    font-size: 12px;
}

.geo-flag {
    font-size: 16px;
    flex-shrink: 0;
}

.geo-loc {
    color: var(--text);
    font-weight: 500;
}