/* ============================================================
   Nobody Asked For It — stile condiviso dei laboratori (/labs)
   Ogni app è autonoma ma coerente con il tema del sito.
   ============================================================ */
:root {
    --bg:        #0a0e14;
    --bg-alt:    #0d1219;
    --surface:   #131b28;
    --surface-2: #1a2436;
    --border:    #223047;
    --text:      #d7e1ef;
    --text-dim:  #93a5bc;
    --accent:    #00e5a0;
    --accent-2:  #7c5cff;
    --accent-3:  #22d3ee;
    --warn:      #ffb454;
    --danger:    #ff5c7a;
    --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --mono: ui-monospace, "Cascadia Code", "JetBrains Mono", Consolas, "Courier New", monospace;
    --radius: 10px;
}

*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
    margin: 0;
    min-height: 100vh;
    background: var(--bg);
    color: var(--text);
    font-family: var(--sans);
    line-height: 1.6;
    background-image:
        radial-gradient(ellipse 70% 40% at 50% -10%, rgba(124, 92, 255, 0.08), transparent),
        linear-gradient(rgba(34, 48, 71, 0.2) 1px, transparent 1px),
        linear-gradient(90deg, rgba(34, 48, 71, 0.2) 1px, transparent 1px);
    background-size: 100% 100%, 44px 44px, 44px 44px;
}

.mono { font-family: var(--mono); }
.dim { color: var(--text-dim); }
.accent { color: var(--accent); }

.lab-wrap { max-width: 60rem; margin-inline: auto; padding: 1.5rem 1.25rem 3rem; }

.lab-header {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
    padding-bottom: 1rem;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--border);
}
.lab-back {
    font: 600 0.85rem var(--mono);
    color: var(--text-dim);
    text-decoration: none;
}
.lab-back:hover { color: var(--accent); }

h1 { font-size: clamp(1.5rem, 4vw, 2.1rem); margin: 0 0 0.35rem; line-height: 1.2; }
h1 .mono { color: var(--accent); }
h2 { font-size: 1.05rem; margin: 0 0 0.75rem; }
h2.panel-title { font: 600 0.8rem var(--mono); color: var(--accent); letter-spacing: 0.05em; }

.lab-subtitle { color: var(--text-dim); margin: 0 0 0; max-width: 44rem; }

a { color: var(--accent); }
p { margin: 0 0 1rem; }

.panel {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem;
    margin-bottom: 1.25rem;
}

.banner {
    padding: 0.8rem 1.1rem;
    border-radius: 8px;
    border: 1px solid;
    font-size: 0.92rem;
    margin-bottom: 1.25rem;
}
.banner-warn   { color: var(--warn); border-color: rgba(255, 180, 84, 0.45); background: rgba(255, 180, 84, 0.08); }
.banner-info   { color: var(--accent-3); border-color: rgba(34, 211, 238, 0.45); background: rgba(34, 211, 238, 0.08); }
.banner-danger { color: var(--danger); border-color: rgba(255, 92, 122, 0.45); background: rgba(255, 92, 122, 0.08); }

button, .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    padding: 0.55rem 1.1rem;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--surface-2);
    color: var(--text);
    font: 600 0.9rem var(--sans);
    cursor: pointer;
    text-decoration: none;
    transition: border-color 150ms ease, color 150ms ease, box-shadow 150ms ease;
}
button:hover, .btn:hover { border-color: var(--accent); color: var(--accent); }
button:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible {
    outline: 2px solid var(--accent-3);
    outline-offset: 2px;
}
.btn-primary {
    background: linear-gradient(120deg, var(--accent), #00c48a);
    border-color: transparent;
    color: #04140d;
}
.btn-primary:hover { color: #04140d; box-shadow: 0 4px 18px rgba(0, 229, 160, 0.35); }
.btn-danger { color: var(--danger); border-color: rgba(255, 92, 122, 0.4); background: transparent; }
.btn-danger:hover { border-color: var(--danger); color: var(--danger); background: rgba(255, 92, 122, 0.1); }
.btn-small { padding: 0.3rem 0.6rem; font-size: 0.8rem; }

input[type="text"], input[type="number"], select, textarea {
    padding: 0.55rem 0.75rem;
    background: var(--bg-alt);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 7px;
    font: 400 0.95rem var(--sans);
}
input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(0, 229, 160, 0.15);
}
label { font-size: 0.85rem; font-weight: 600; }

.row { display: flex; flex-wrap: wrap; gap: 0.6rem; align-items: center; }

.stat-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(8rem, 1fr));
    gap: 0.9rem;
    margin-bottom: 1.25rem;
}
.stat {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 0.9rem;
    text-align: center;
}
.stat b { display: block; font: 700 1.6rem var(--mono); color: var(--accent); }
.stat span { font-size: 0.8rem; color: var(--text-dim); }

.log {
    font: 400 0.82rem var(--mono);
    background: var(--bg-alt);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0.9rem 1rem;
    max-height: 18rem;
    overflow-y: auto;
    color: var(--text-dim);
}
.log p { margin: 0 0 0.3rem; word-break: break-word; }
.log .ok { color: var(--accent); }
.log .warn { color: var(--warn); }
.log .err { color: var(--danger); }

table { width: 100%; border-collapse: collapse; font-size: 0.92rem; }
th, td { padding: 0.55rem 0.7rem; text-align: left; border-bottom: 1px solid var(--border); vertical-align: middle; }
thead th { font: 600 0.72rem var(--mono); color: var(--accent); letter-spacing: 0.05em; }
tbody tr:last-child td { border-bottom: 0; }

.chip {
    display: inline-block;
    font: 600 0.7rem var(--mono);
    padding: 0.12rem 0.5rem;
    border-radius: 999px;
    border: 1px solid rgba(34, 211, 238, 0.45);
    color: var(--accent-3);
    background: rgba(34, 211, 238, 0.08);
    margin: 0 0.2rem 0.2rem 0;
    cursor: pointer;
}
.chip:hover { border-color: var(--danger); color: var(--danger); }

.led {
    display: inline-block;
    width: 9px; height: 9px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 6px var(--accent);
    margin-right: 0.4rem;
    animation: led-pulse 2s ease-in-out infinite;
}
.led-warn { background: var(--warn); box-shadow: 0 0 6px var(--warn); }
.led-off  { background: var(--danger); box-shadow: 0 0 6px var(--danger); animation: none; }
@keyframes led-pulse { 50% { opacity: 0.45; } }

canvas { max-width: 100%; }

.lab-footer {
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
    font: 400 0.78rem var(--mono);
    color: var(--text-dim);
}
.lab-footer p { margin: 0; }

.visually-hidden {
    position: absolute !important;
    width: 1px; height: 1px;
    padding: 0; margin: -1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap; border: 0;
}

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