:root {
    --bg-primary: #050914;
    --bg-secondary: #08111f;
    --panel: rgba(9, 18, 32, 0.92);
    --panel-soft: rgba(15, 27, 45, 0.78);
    --text: #dff7ff;
    --muted: #8ea7b8;
    --border: rgba(0, 245, 255, 0.28);
    --border-soft: rgba(142, 167, 184, 0.22);
    --accent-cyan: #00f5ff;
    --accent-orange: #ff6a00;
    --accent-green: #68ff9b;
    --warn: #ff5470;
    --field-bg: rgba(3, 9, 17, 0.88);
    --radius: 8px;
    --font-display: Orbitron, Rajdhani, 'Segoe UI', system-ui, sans-serif;
    --font-body:
        'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Consolas,
        monospace;
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    min-height: 100%;
}

html {
    background: var(--bg-primary);
}

body.neon-meter-app {
    min-height: 100vh;
    font-family: var(--font-body);
    background-color: var(--bg-primary);
    background-image:
        repeating-linear-gradient(
            0deg,
            rgba(255, 255, 255, 0.018),
            rgba(255, 255, 255, 0.018) 1px,
            transparent 1px,
            transparent 3px
        ),
        linear-gradient(rgba(0, 245, 255, 0.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 245, 255, 0.035) 1px, transparent 1px),
        linear-gradient(180deg, var(--bg-secondary), var(--bg-primary));
    background-size:
        auto,
        32px 32px,
        32px 32px,
        auto;
    color: var(--text);
}

button {
    border: 0;
    font: inherit;
}

button:focus-visible {
    outline: 2px solid rgba(0, 245, 255, 0.62);
    outline-offset: 2px;
}

.app-shell {
    width: min(1120px, 100% - 32px);
    margin: 20px auto 32px;
    display: grid;
    gap: 14px;
}

.topbar,
.status-strip,
.panel {
    position: relative;
    overflow: hidden;
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow:
        0 0 18px rgba(0, 245, 255, 0.1),
        inset 0 0 16px rgba(0, 245, 255, 0.045);
}

.topbar::after,
.status-strip::after,
.panel::after {
    content: '';
    position: absolute;
    inset: 0;
    pointer-events: none;
    border-radius: inherit;
    background: linear-gradient(
        135deg,
        rgba(0, 245, 255, 0.08),
        transparent 34%,
        rgba(255, 106, 0, 0.05)
    );
}

.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    padding: 14px 16px;
}

.brand,
.toolbar,
.panel > *,
.status-strip > * {
    position: relative;
    z-index: 1;
}

.brand {
    display: flex;
    align-items: center;
    min-width: 0;
    gap: 12px;
}

.brand-mark {
    width: 46px;
    height: 46px;
    flex: 0 0 auto;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 0 14px rgba(0, 245, 255, 0.18);
}

.brand-icon {
    display: block;
    width: 100%;
    height: 100%;
}

.eyebrow,
h1,
h2,
p {
    margin: 0;
}

.eyebrow {
    color: var(--accent-cyan);
    font-size: 0.76rem;
}

h1,
h2 {
    font-family: var(--font-display);
    letter-spacing: 0;
}

h1 {
    margin-top: 2px;
    overflow-wrap: anywhere;
    font-size: 1.45rem;
    line-height: 1.2;
    text-shadow: 0 0 12px rgba(0, 245, 255, 0.24);
}

h2 {
    color: var(--text);
    font-size: 0.96rem;
}

.toolbar {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.version-pill {
    border: 1px solid rgba(255, 106, 0, 0.42);
    border-radius: 999px;
    padding: 5px 10px;
    color: #ffd7ab;
    background: rgba(255, 106, 0, 0.075);
    font-size: 0.82rem;
}

.status-strip {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
    align-items: center;
    padding: 12px 16px;
}

.status-item {
    display: grid;
    gap: 3px;
    min-width: 0;
}

.status-item span,
.status-item small {
    color: var(--muted);
}

.status-item span {
    font-size: 0.84rem;
}

.status-item strong {
    overflow-wrap: anywhere;
    color: var(--accent-cyan);
    font-size: 1rem;
    text-shadow: 0 0 10px rgba(0, 245, 255, 0.26);
}

.workspace {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 360px;
    gap: 14px;
    align-items: start;
}

.panel {
    display: grid;
    gap: 14px;
    padding: 16px;
}

.section-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border-soft);
    padding-bottom: 8px;
}

.section-heading::after {
    content: '';
    width: 44px;
    height: 1px;
    background: var(--accent-orange);
    box-shadow: 0 0 10px rgba(255, 106, 0, 0.55);
}

.lead {
    max-width: 64ch;
    color: var(--muted);
    line-height: 1.55;
}

.btn-primary {
    min-height: 42px;
    border: 1px solid rgba(0, 245, 255, 0.58);
    border-radius: var(--radius);
    padding: 0 16px;
    color: var(--text);
    background: linear-gradient(
        120deg,
        rgba(0, 245, 255, 0.14),
        rgba(255, 106, 0, 0.18)
    );
    cursor: pointer;
    transition:
        border-color 0.16s ease,
        box-shadow 0.16s ease,
        transform 0.16s ease;
}

.btn-primary:hover {
    border-color: var(--accent-cyan);
    box-shadow: 0 0 14px rgba(0, 245, 255, 0.24);
    transform: translateY(-1px);
}

esp-web-install-button {
    --esp-tools-button-color: var(--accent-cyan);
    --esp-tools-button-text-color: #031019;
    --esp-tools-button-border-radius: var(--radius);
    display: block;
}

.tool-message {
    display: block;
    border: 1px solid var(--border-soft);
    border-radius: var(--radius);
    background: var(--field-bg);
    color: var(--muted);
    padding: 12px;
    line-height: 1.45;
}

.settings-summary {
    display: grid;
    gap: 10px;
    margin: 0;
}

.settings-summary div {
    display: grid;
    gap: 4px;
    border-left: 3px solid rgba(0, 245, 255, 0.52);
    padding-left: 10px;
}

.settings-summary dt {
    color: var(--muted);
    font-size: 0.78rem;
}

.settings-summary dd {
    margin: 0;
    color: var(--text);
    overflow-wrap: anywhere;
}

.security-note {
    display: grid;
    gap: 6px;
    border: 1px solid var(--border-soft);
    border-radius: var(--radius);
    background: var(--panel-soft);
    padding: 12px;
}

.security-note strong {
    color: #ffd7ab;
}

.security-note span {
    color: var(--muted);
    line-height: 1.45;
}

@media (max-width: 860px) {
    .topbar,
    .status-strip,
    .workspace {
        grid-template-columns: 1fr;
    }

    .topbar {
        align-items: flex-start;
        flex-direction: column;
    }

    .brand,
    .toolbar {
        width: 100%;
    }
}

@media (max-width: 520px) {
    .app-shell {
        width: min(100% - 20px, 1120px);
        margin-top: 10px;
    }

    .btn-primary {
        width: 100%;
    }
}