/* ═══════════════════════════════════════════════════════════════════════
   IVAC HostChecker — Professional Dark Theme
   ═══════════════════════════════════════════════════════════════════════ */

/* ─── Design tokens ─────────────────────────────────────────────────── */
:root {
    /* Surfaces */
    --bg-0:        #060912;
    --bg-1:        #0c1220;
    --bg-2:        #131a2b;
    --bg-3:        #1a2238;
    --surface:     rgba(20, 27, 48, 0.7);
    --surface-2:   rgba(28, 36, 60, 0.6);
    --border:      rgba(148, 163, 184, 0.08);
    --border-hov:  rgba(96, 165, 250, 0.35);
    --border-active: rgba(96, 165, 250, 0.6);
    /* Text */
    --text:        #e8edf5;
    --text-2:      #b4bccb;
    --text-3:      #7c8699;
    --text-muted:  #5b6478;
    /* Accent */
    --primary:     #60a5fa;
    --primary-2:   #818cf8;
    --accent:      #c084fc;
    --ok:          #4ade80;
    --warn:        #fbbf24;
    --high:        #fb923c;
    --crit:        #f87171;
    --info:        #38bdf8;
    /* Radius */
    --r-sm: 6px;
    --r-md: 10px;
    --r-lg: 14px;
    --r-xl: 18px;
    /* Shadow */
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.25);
    --shadow-md: 0 6px 20px rgba(0,0,0,0.35);
    --shadow-lg: 0 12px 40px rgba(0,0,0,0.45);
    --glow:      0 0 0 1px rgba(96,165,250,0.18), 0 0 24px rgba(96,165,250,0.15);
}

/* ─── Reset & base ─────────────────────────────────────────────────── */
* { box-sizing: border-box; margin: 0; padding: 0; }
html, body {
    background:
        radial-gradient(1200px 800px at 10% -10%, rgba(96,165,250,0.08) 0%, transparent 60%),
        radial-gradient(900px 700px at 90% -20%, rgba(192,132,252,0.07) 0%, transparent 60%),
        radial-gradient(1400px 1000px at 50% 110%, rgba(56,189,248,0.05) 0%, transparent 65%),
        var(--bg-0);
    background-attachment: fixed;
    color: var(--text);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
    font-size: 14px;
    line-height: 1.5;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}
code, pre { font-family: 'JetBrains Mono', Consolas, "Liberation Mono", monospace; }
button, input, textarea, select { font: inherit; color: inherit; }

/* Scrollbar polish */
::-webkit-scrollbar         { width: 10px; height: 10px; }
::-webkit-scrollbar-track   { background: var(--bg-1); }
::-webkit-scrollbar-thumb   { background: var(--bg-3); border-radius: 5px; }
::-webkit-scrollbar-thumb:hover { background: #2c3955; }

::selection { background: rgba(96,165,250,0.35); color: #fff; }

/* ─── Topbar ───────────────────────────────────────────────────────── */
.topbar {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(6, 9, 18, 0.75);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--border);
    padding: 14px 28px;
    display: flex;
    align-items: center;
    gap: 24px;
    flex-wrap: wrap;
}
.topbar-left { flex: 0 0 auto; }
.topbar h1 {
    font-size: 17px;
    font-weight: 700;
    letter-spacing: -0.3px;
    background: linear-gradient(135deg, #93c5fd 0%, #c4b5fd 50%, #f0abfc 100%);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 8px;
}
.topbar-nav {
    flex: 1 1 auto;
    display: flex;
    gap: 4px;
    justify-content: center;
    flex-wrap: wrap;
}
.nav-btn {
    background: transparent;
    border: 1px solid transparent;
    color: var(--text-2);
    padding: 9px 16px;
    border-radius: var(--r-md);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    white-space: nowrap;
}
.nav-btn:hover {
    color: #fff;
    background: var(--surface-2);
}
.nav-btn.nav-active {
    background: linear-gradient(135deg, rgba(96,165,250,0.18), rgba(192,132,252,0.14));
    border-color: var(--border-active);
    color: #fff;
    box-shadow: var(--glow);
    font-weight: 600;
}
.topbar-right {
    flex: 0 0 auto;
    display: flex;
    align-items: center;
    gap: 10px;
}
.user-tag {
    background: linear-gradient(135deg, rgba(96,165,250,0.15), rgba(192,132,252,0.12));
    color: #c7d2fe;
    padding: 6px 12px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 500;
    border: 1px solid rgba(96,165,250,0.15);
    white-space: nowrap;
}
@media (max-width: 820px) {
    .topbar { flex-direction: column; align-items: stretch; padding: 12px 16px; }
    .topbar-nav { order: 2; overflow-x: auto; }
    .topbar-right { order: 3; justify-content: flex-end; }
}

/* ─── Layout ───────────────────────────────────────────────────────── */
.container {
    max-width: 1180px;
    margin: 0 auto;
    padding: 28px 24px 60px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    animation: fadeUp 0.4s ease;
}
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ─── Cards (glass effect) ─────────────────────────────────────────── */
.card {
    background: var(--surface);
    backdrop-filter: blur(20px) saturate(140%);
    -webkit-backdrop-filter: blur(20px) saturate(140%);
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    padding: 22px 24px;
    box-shadow: var(--shadow-md);
    transition: border-color 0.3s, box-shadow 0.3s;
}
.card:hover {
    border-color: rgba(148,163,184,0.13);
}
.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 14px;
    flex-wrap: wrap;
    gap: 12px;
}
.card-header h2 {
    font-size: 17px;
    font-weight: 700;
    letter-spacing: -0.2px;
    color: #fff;
    display: flex;
    align-items: center;
    gap: 8px;
}
.hint {
    color: var(--text-3);
    font-size: 12.5px;
    margin: 4px 0 14px;
    line-height: 1.55;
}
.hint code {
    background: rgba(96,165,250,0.08);
    border: 1px solid rgba(96,165,250,0.12);
    padding: 1px 7px;
    border-radius: 5px;
    color: #93c5fd;
    font-size: 12px;
}

/* ─── Buttons ──────────────────────────────────────────────────────── */
.btn-group { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    border: 1px solid transparent;
    border-radius: var(--r-md);
    padding: 8px 16px;
    cursor: pointer;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: -0.1px;
    transition: all 0.18s cubic-bezier(0.4, 0, 0.2, 1);
    user-select: none;
}
.btn:hover  { filter: brightness(1.12); transform: translateY(-1px); box-shadow: var(--shadow-sm); }
.btn:active { transform: translateY(0); filter: brightness(0.95); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; transform: none; box-shadow: none; }
.btn-primary { background: linear-gradient(135deg, #2563eb, #7c3aed); color: #fff; }
.btn-green   { background: linear-gradient(135deg, #16a34a, #059669); color: #fff; }
.btn-blue    { background: linear-gradient(135deg, #2563eb, #1d4ed8); color: #fff; }
.btn-cyan    { background: linear-gradient(135deg, #0891b2, #0e7490); color: #fff; }
.btn-red     { background: linear-gradient(135deg, #dc2626, #b91c1c); color: #fff; }
.btn-ghost {
    background: transparent;
    color: var(--text-2);
    border-color: var(--border);
}
.btn-ghost:hover {
    border-color: var(--border-hov);
    color: #fff;
    background: var(--surface-2);
}

/* ─── Inputs ───────────────────────────────────────────────────────── */
input[type=text], input[type=password], input[type=number], textarea, select {
    width: 100%;
    background: rgba(6, 9, 18, 0.6);
    border: 1px solid var(--border);
    border-radius: var(--r-md);
    padding: 10px 14px;
    color: var(--text);
    font-size: 13.5px;
    outline: none;
    margin-bottom: 10px;
    transition: border-color 0.15s, box-shadow 0.15s, background 0.15s;
}
input:focus, textarea:focus, select:focus {
    border-color: var(--border-active);
    box-shadow: 0 0 0 3px rgba(96,165,250,0.12);
    background: rgba(6, 9, 18, 0.85);
}
input::placeholder, textarea::placeholder { color: var(--text-muted); }
textarea {
    font-family: 'JetBrains Mono', Consolas, monospace;
    font-size: 13px;
    line-height: 1.5;
    resize: vertical;
    height: 533px;
}
label {
    display: block;
    font-size: 10.5px;
    font-weight: 700;
    color: var(--text-3);
    text-transform: uppercase;
    letter-spacing: 0.7px;
    margin-bottom: 6px;
    margin-top: 12px;
}

/* ─── Config grid ──────────────────────────────────────────────────── */
.config-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
}
@media (max-width: 720px) {
    .config-grid { grid-template-columns: 1fr; }
}
.config-group {
    background: var(--bg-1);
    border: 1px solid var(--border);
    border-radius: var(--r-md);
    padding: 16px 18px;
    transition: border-color 0.2s;
}
.config-group:hover { border-color: rgba(96,165,250,0.18); }
.config-group h3 {
    font-size: 12px;
    color: var(--warn);
    font-weight: 700;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    margin-bottom: 10px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 6px;
}

/* ─── Row label/input combo ────────────────────────────────────────── */
.row {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}
.row-label {
    flex: 0 0 100px;
    font-size: 11px;
    color: var(--text-3);
    text-transform: uppercase;
    letter-spacing: 0.6px;
    font-weight: 600;
}
.row input { flex: 1; margin-bottom: 0; }

/* ─── Result list (Bulk Host Checker) ──────────────────────────────── */
.result-summary {
    color: var(--text-2);
    font-size: 13px;
    margin: 14px 0 8px;
    padding: 10px 14px;
    background: var(--bg-1);
    border: 1px solid var(--border);
    border-radius: var(--r-md);
    font-variant-numeric: tabular-nums;
}
.result-summary b { color: #fff; font-weight: 700; }
.result-list {
    max-height: 60vh;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 4px;
    border: 1px solid var(--border);
    border-radius: var(--r-md);
    padding: 8px;
    min-height: 50px;
    background: rgba(6, 9, 18, 0.4);
}
.ip-row {
    display: grid;
    grid-template-columns: 200px 1fr 40px;
    align-items: center;
    gap: 14px;
    background: var(--bg-1);
    padding: 9px 14px;
    border: 1px solid transparent;
    border-radius: var(--r-sm);
    transition: all 0.15s;
}
.ip-row:hover {
    border-color: rgba(96,165,250,0.25);
    background: var(--bg-2);
    transform: translateX(2px);
}
.ip {
    color: #93c5fd;
    font-size: 13px;
    background: transparent;
    font-weight: 500;
}
.verdict {
    font-size: 12px;
    font-weight: 600;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-variant-numeric: tabular-nums;
}
.verdict-ok  { color: var(--ok); }
.verdict-bad { color: var(--crit); }
.row-btn {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-2);
    cursor: pointer;
    padding: 5px 9px;
    border-radius: var(--r-sm);
    font-size: 13px;
    transition: all 0.15s;
}
.row-btn:hover {
    border-color: var(--border-hov);
    color: #fff;
    background: var(--surface-2);
}
.bottom-actions {
    margin-top: 16px;
    display: flex;
    gap: 12px;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}

/* ─── Toast ────────────────────────────────────────────────────────── */
.toast {
    position: fixed;
    bottom: 28px;
    right: 28px;
    background: rgba(20, 27, 48, 0.95);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    color: var(--text);
    padding: 12px 20px;
    border-radius: var(--r-md);
    border: 1px solid var(--border);
    border-left: 3px solid var(--primary);
    font-size: 13px;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    transform: translateY(20px) scale(0.96);
    transition: opacity 0.22s, transform 0.22s cubic-bezier(0.4, 0, 0.2, 1);
    pointer-events: none;
    z-index: 9999;
    max-width: 380px;
}
.toast.show {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: auto;
}
.toast-success { border-left-color: var(--ok); }
.toast-error   { border-left-color: var(--crit); }
.toast-info    { border-left-color: var(--info); }

/* ─── Login page ───────────────────────────────────────────────────── */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
    background:
        radial-gradient(900px 700px at 20% 30%, rgba(96,165,250,0.12) 0%, transparent 60%),
        radial-gradient(700px 600px at 80% 70%, rgba(192,132,252,0.1) 0%, transparent 60%),
        var(--bg-0);
}
.login-box {
    width: 100%;
    max-width: 380px;
    background: rgba(20, 27, 48, 0.85);
    backdrop-filter: blur(20px) saturate(150%);
    -webkit-backdrop-filter: blur(20px) saturate(150%);
    border: 1px solid var(--border);
    border-radius: var(--r-xl);
    padding: 32px 30px 28px;
    box-shadow: var(--shadow-lg), 0 0 0 1px rgba(96,165,250,0.05);
    animation: fadeUp 0.4s ease;
}
.login-box h1 {
    font-size: 24px;
    font-weight: 800;
    text-align: center;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, #93c5fd 0%, #c4b5fd 50%, #f0abfc 100%);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.login-sub {
    text-align: center;
    color: var(--text-3);
    font-size: 13px;
    margin: 6px 0 22px;
}
.login-box label { margin-top: 14px; }
.login-box form {
    display: flex;
    flex-direction: column;
}
.login-box button[type=submit] {
    align-self: center;
    justify-content: center;
    text-align: center;
    min-width: 180px;
    padding: 11px 28px;
    margin-top: 22px;
    background: linear-gradient(135deg, #2563eb, #7c3aed);
    box-shadow: 0 4px 16px rgba(96,165,250,0.25);
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 0.2px;
}
.login-box button[type=submit]:hover {
    box-shadow: 0 6px 24px rgba(96,165,250,0.4);
}
.login-error {
    background: rgba(248,113,113,0.1);
    border: 1px solid rgba(248,113,113,0.25);
    color: #fca5a5;
    padding: 10px 14px;
    border-radius: var(--r-md);
    font-size: 12.5px;
    margin-bottom: 18px;
    line-height: 1.5;
}
.login-foot {
    text-align: center;
    color: var(--text-muted);
    font-size: 11px;
    margin-top: 22px;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}

/* ═══════════════════════════════════════════════════════════════════════
   Server Monitor (Pro)
   ═══════════════════════════════════════════════════════════════════════ */
.monitor-banner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: linear-gradient(135deg, rgba(15,23,42,0.95) 0%, rgba(30,41,59,0.85) 100%);
    border: 1px solid rgba(96,165,250,0.15);
    border-radius: var(--r-lg);
    padding: 16px 22px;
    margin-bottom: 18px;
    box-shadow: var(--shadow-md);
}
.monitor-banner-left { display: flex; align-items: center; gap: 16px; }
.banner-host {
    font-size: 18px;
    font-weight: 700;
    color: #c7d2fe;
    font-family: 'JetBrains Mono', Consolas, monospace;
    letter-spacing: -0.2px;
}
.banner-meta {
    font-size: 10.5px;
    color: var(--text-3);
    margin-top: 3px;
    text-transform: uppercase;
    letter-spacing: 0.6px;
    font-weight: 600;
}
.pulse-dot {
    width: 12px;
    height: 12px;
    background: var(--ok);
    border-radius: 50%;
    box-shadow: 0 0 0 0 rgba(74,222,128,0.7);
    animation: pulse 2s infinite;
}
@keyframes pulse {
    0%   { box-shadow: 0 0 0 0 rgba(74,222,128,0.7); }
    70%  { box-shadow: 0 0 0 12px rgba(74,222,128,0); }
    100% { box-shadow: 0 0 0 0 rgba(74,222,128,0); }
}

.pro-stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 16px;
    margin-bottom: 18px;
}
.pro-stat {
    position: relative;
    background: linear-gradient(135deg, rgba(20,27,48,0.85), rgba(28,36,60,0.7));
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    padding: 18px 20px;
    transition: all 0.3s;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}
.pro-stat:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.pro-stat::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 3px; height: 100%;
    background: var(--primary);
    transition: background 0.3s;
}
.pro-stat.tint-ok::before    { background: var(--ok); }
.pro-stat.tint-med::before   { background: var(--warn); }
.pro-stat.tint-warn::before  { background: var(--high); }
.pro-stat.tint-crit::before  { background: var(--crit); }
.pro-stat.tint-crit          { box-shadow: 0 0 32px rgba(248,113,113,0.18); }

.pro-stat-head {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 14px;
}
.pro-stat-icon { font-size: 16px; }
.pro-stat-label {
    flex: 1;
    font-size: 10.5px;
    font-weight: 700;
    color: var(--text-3);
    text-transform: uppercase;
    letter-spacing: 0.8px;
}
.pro-stat-status {
    font-size: 9.5px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.6px;
    padding: 3px 9px;
    border-radius: 999px;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.05);
}
.pro-stat-status-ok    { color: var(--ok);   background: rgba(74,222,128,0.1);  border-color: rgba(74,222,128,0.2); }
.pro-stat-status-med   { color: var(--warn); background: rgba(251,191,36,0.1);  border-color: rgba(251,191,36,0.2); }
.pro-stat-status-warn  { color: var(--high); background: rgba(251,146,60,0.1);  border-color: rgba(251,146,60,0.25); }
.pro-stat-status-crit  { color: var(--crit); background: rgba(248,113,113,0.1); border-color: rgba(248,113,113,0.3); }

.pro-stat-value {
    font-size: 30px;
    font-weight: 800;
    color: #fff;
    line-height: 1.05;
    letter-spacing: -0.8px;
    font-variant-numeric: tabular-nums;
}
.pro-stat-sub {
    font-size: 11px;
    color: var(--text-3);
    margin: 6px 0 12px;
    font-family: 'JetBrains Mono', Consolas, monospace;
    font-weight: 500;
}

.pro-bar {
    height: 6px;
    background: rgba(255,255,255,0.04);
    border-radius: 3px;
    overflow: hidden;
}
.pro-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 0 10px rgba(96,165,250,0.45);
    border-radius: 3px;
}
.pro-stat.tint-ok   .pro-bar-fill { background: linear-gradient(90deg, #4ade80, #06b6d4); }
.pro-stat.tint-med  .pro-bar-fill { background: linear-gradient(90deg, #fbbf24, #f97316); }
.pro-stat.tint-warn .pro-bar-fill { background: linear-gradient(90deg, #f97316, #ef4444); }
.pro-stat.tint-crit .pro-bar-fill { background: linear-gradient(90deg, #ef4444, #dc2626); }

.pro-stat-extra {
    display: flex;
    justify-content: space-between;
    margin-top: 12px;
    font-size: 11px;
    color: var(--text-3);
    font-family: 'JetBrains Mono', Consolas, monospace;
}
.sparkline {
    width: 100%;
    height: 42px;
    margin-top: 12px;
    display: block;
    border-radius: 4px;
}

.pro-load-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    margin-top: 12px;
}
.pro-load-grid > div {
    background: rgba(6, 9, 18, 0.5);
    border: 1px solid var(--border);
    border-radius: var(--r-sm);
    padding: 8px 6px;
    display: flex;
    flex-direction: column;
    align-items: center;
}
.load-label {
    font-size: 9.5px;
    color: var(--text-3);
    text-transform: uppercase;
    letter-spacing: 0.6px;
    font-weight: 700;
}
.load-val {
    font-size: 14px;
    font-weight: 700;
    color: #93c5fd;
    font-family: 'JetBrains Mono', Consolas, monospace;
    margin-top: 2px;
}

.pro-info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
    gap: 12px;
    margin-bottom: 18px;
}
.pro-info-card {
    background: var(--bg-1);
    border: 1px solid var(--border);
    border-radius: var(--r-md);
    padding: 14px 16px;
    transition: border-color 0.2s, transform 0.2s;
}
.pro-info-card:hover {
    border-color: rgba(96,165,250,0.18);
    transform: translateY(-1px);
}
.pro-info-label {
    font-size: 10.5px;
    color: var(--text-3);
    text-transform: uppercase;
    letter-spacing: 0.6px;
    font-weight: 700;
    margin-bottom: 8px;
}
.pro-info-value {
    font-size: 16px;
    font-weight: 700;
    color: #fff;
    font-variant-numeric: tabular-nums;
    font-family: 'JetBrains Mono', Consolas, monospace;
}

.card-sub {
    background: var(--bg-1);
    border: 1px solid var(--border);
    border-radius: var(--r-md);
    padding: 16px 18px;
}
.card-sub-title {
    font-size: 12px;
    font-weight: 700;
    color: var(--warn);
    margin-bottom: 14px;
    text-transform: uppercase;
    letter-spacing: 0.6px;
}
.core-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 8px;
}
.core-cell {
    background: rgba(6, 9, 18, 0.5);
    border: 1px solid var(--border);
    border-radius: var(--r-sm);
    padding: 9px 12px;
    display: grid;
    grid-template-columns: 44px 1fr 40px;
    align-items: center;
    gap: 10px;
    transition: border-color 0.15s;
}
.core-cell:hover { border-color: rgba(96,165,250,0.18); }
.core-name {
    font-size: 10.5px;
    color: var(--text-3);
    font-family: 'JetBrains Mono', Consolas, monospace;
    font-weight: 600;
}
.core-bar {
    height: 5px;
    background: rgba(255,255,255,0.04);
    border-radius: 2.5px;
    overflow: hidden;
}
.core-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    transition: width 0.5s;
    border-radius: 2.5px;
}
.core-pct {
    font-size: 11px;
    color: var(--text-2);
    text-align: right;
    font-family: 'JetBrains Mono', Consolas, monospace;
    font-weight: 600;
}

/* ─── Log viewer ───────────────────────────────────────────────────── */
.log-output {
    background: #050810;
    border: 1px solid var(--border);
    border-radius: var(--r-md);
    padding: 14px 16px;
    font-family: 'JetBrains Mono', Consolas, "Liberation Mono", monospace;
    font-size: 12px;
    color: #cbd5e1;
    height: 533px;
    overflow-y: auto;
    white-space: pre-wrap;
    word-break: break-all;
    line-height: 1.55;
    box-shadow: inset 0 2px 8px rgba(0,0,0,0.4);
}
.switch {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: var(--text-3);
    cursor: pointer;
    padding: 4px 8px;
    border-radius: var(--r-sm);
    transition: color 0.15s;
}
.switch:hover { color: #fff; }
.switch input {
    margin: 0;
    cursor: pointer;
    accent-color: var(--primary);
}

/* ═══════════════════════════════════════════════════════════════════════
   Responsive — Mobile / Tablet / Desktop / Wide
   ═══════════════════════════════════════════════════════════════════════ */

/* Wide (>1280px) — already handled via max-width on .container */

/* Laptop (1024-1280px) */
@media (max-width: 1280px) {
    .container { padding: 24px 20px 50px; }
}

/* Tablet landscape (768-1024px) */
@media (max-width: 1024px) {
    .topbar { padding: 12px 18px; gap: 14px; }
    .topbar h1 { font-size: 16px; }
    .topbar-nav { gap: 3px; }
    .nav-btn { padding: 8px 12px; font-size: 12.5px; }
    .container { padding: 20px 16px 50px; }
    .card { padding: 18px 20px; }
    .pro-stat-value { font-size: 26px; }
    .ip-row { grid-template-columns: 160px 1fr 36px; gap: 10px; }
    textarea { height: 420px; }
    .log-output { height: 420px; }
}

/* Tablet portrait (640-768px) */
@media (max-width: 820px) {
    .topbar {
        flex-direction: column;
        align-items: stretch;
        gap: 10px;
        padding: 12px 14px;
    }
    .topbar-left {
        display: flex;
        justify-content: center;
    }
    .topbar h1 { font-size: 16px; }
    .topbar-nav {
        order: 2;
        overflow-x: auto;
        scrollbar-width: none;
        -ms-overflow-style: none;
        justify-content: flex-start;
        padding-bottom: 4px;
    }
    .topbar-nav::-webkit-scrollbar { display: none; }
    .nav-btn {
        flex: 0 0 auto;
        padding: 8px 14px;
        font-size: 12.5px;
    }
    .topbar-right {
        order: 3;
        justify-content: center;
    }
    .container { padding: 16px 14px 40px; gap: 14px; }
    .card { padding: 16px 16px; border-radius: var(--r-md); }
    .card-header { margin-bottom: 12px; }
    .card-header h2 { font-size: 15px; }
    .btn-group { gap: 8px; }
    .btn { padding: 7px 13px; font-size: 12.5px; }
    .config-grid { grid-template-columns: 1fr; gap: 12px; }
    .config-group { padding: 14px; }
    .pro-stats-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
    .pro-stat { padding: 14px 16px; }
    .pro-stat-value { font-size: 24px; }
    .pro-info-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
    .pro-info-card { padding: 12px 14px; }
    .pro-info-value { font-size: 14px; }
    .monitor-banner { padding: 14px 16px; }
    .banner-host { font-size: 16px; }
    textarea { height: 360px; font-size: 12.5px; }
    .log-output { height: 360px; font-size: 11.5px; }
    .ip-row {
        grid-template-columns: 1fr 40px;
        grid-template-rows: auto auto;
        gap: 6px 10px;
        padding: 10px 12px;
    }
    .ip-row .ip {
        grid-column: 1;
        grid-row: 1;
    }
    .ip-row .row-btn {
        grid-column: 2;
        grid-row: 1 / span 2;
        align-self: center;
    }
    .ip-row .verdict {
        grid-column: 1;
        grid-row: 2;
        white-space: normal;
        font-size: 11.5px;
    }
    .row {
        flex-direction: column;
        align-items: stretch;
        gap: 6px;
    }
    .row-label {
        flex: none;
        margin-bottom: 4px;
    }
    .pro-load-grid > div { padding: 6px 4px; }
    .load-val { font-size: 12.5px; }
}

/* Mobile (< 560px) */
@media (max-width: 560px) {
    .topbar { padding: 10px 12px; }
    .topbar h1 { font-size: 15px; }
    .nav-btn { padding: 7px 11px; font-size: 12px; }
    .user-tag { font-size: 11px; padding: 5px 10px; }
    .container { padding: 14px 12px 32px; gap: 12px; }
    .card { padding: 14px; border-radius: var(--r-md); }
    .card-header {
        flex-direction: column;
        align-items: stretch;
        gap: 10px;
    }
    .card-header h2 { font-size: 14.5px; }
    .btn-group {
        justify-content: stretch;
        flex-wrap: wrap;
    }
    .btn {
        flex: 1 1 auto;
        justify-content: center;
        padding: 8px 12px;
        font-size: 12px;
    }
    .btn-ghost { flex: 1 1 100%; }
    .pro-stats-grid { grid-template-columns: 1fr; gap: 10px; }
    .pro-stat-value { font-size: 22px; }
    .pro-info-grid { grid-template-columns: 1fr 1fr; gap: 8px; }
    .pro-info-value { font-size: 13px; }
    .monitor-banner {
        flex-direction: column;
        align-items: stretch;
        gap: 12px;
    }
    .monitor-banner-right { display: flex; justify-content: flex-end; }
    .banner-host { font-size: 15px; word-break: break-all; }
    .core-grid { grid-template-columns: 1fr 1fr; }
    .core-cell { grid-template-columns: 36px 1fr 32px; padding: 7px 10px; }
    .result-list { padding: 6px; max-height: 50vh; }
    .result-summary { font-size: 12px; padding: 9px 12px; }
    textarea { height: 280px; font-size: 12px; padding: 9px 12px; }
    .log-output { height: 280px; font-size: 11px; padding: 10px 12px; }
    .config-group h3 { font-size: 11px; }
    input, select { font-size: 13px; padding: 9px 12px; }
    label { font-size: 10px; }
    .toast {
        bottom: 16px;
        right: 16px;
        left: 16px;
        max-width: none;
    }
    .login-box { padding: 26px 22px 22px; max-width: 100%; }
    .login-box h1 { font-size: 21px; }
    .bottom-actions {
        flex-direction: column;
        gap: 8px;
    }
}

/* Tiny (< 380px) */
@media (max-width: 380px) {
    .pro-info-grid { grid-template-columns: 1fr; }
    .core-grid { grid-template-columns: 1fr; }
    .nav-btn { padding: 6px 9px; font-size: 11.5px; }
    .topbar h1 { font-size: 14px; }
}

/* Touch-friendly tap targets on coarse pointers */
@media (hover: none) and (pointer: coarse) {
    .btn { min-height: 40px; }
    .nav-btn { min-height: 38px; }
    .row-btn { min-height: 32px; min-width: 32px; }
    .ip-row { min-height: 44px; }
    .pro-stat:hover { transform: none; }
    .pro-info-card:hover { transform: none; }
    .ip-row:hover { transform: none; }
    .btn:hover { transform: none; }
}

/* Print (just in case) */
@media print {
    .topbar, .toast, .bottom-actions, .btn-group { display: none !important; }
    body { background: #fff; color: #000; }
    .card { border: 1px solid #ccc; background: #fff; box-shadow: none; }
}

/* Reduce motion preference */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}