@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@400;500;600;700&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

:root {
    --bg: #0b1220;
    --surface: #121b2e;
    --surface-raised: #172440;
    --border: #253253;
    --text: #e7ecf6;
    --text-muted: #8b93a7;
    --accent: #e8a33d;      /* rame / amber - identita' "elettrica" */
    --accent-soft: rgba(232, 163, 61, 0.14);
    --blue: #4f8cff;
    --teal: #2dd4bf;
    --red: #ef5350;
    --radius: 10px;
    --font-ui: 'IBM Plex Sans', system-ui, sans-serif;
    --font-mono: 'IBM Plex Mono', monospace;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-ui);
    background-image:
        linear-gradient(var(--border) 1px, transparent 1px),
        linear-gradient(90deg, var(--border) 1px, transparent 1px);
    background-size: 48px 48px;
    background-attachment: fixed;
    background-color: var(--bg);
    min-height: 100vh;
}

/* la griglia di sfondo e' molto tenue: la sovrapponiamo a un layer scuro */
body::before {
    content: "";
    position: fixed;
    inset: 0;
    background: radial-gradient(ellipse at top, rgba(11,18,32,0.2), rgba(11,18,32,0.97));
    pointer-events: none;
    z-index: 0;
}

main.page-container, header.topbar {
    position: relative;
    z-index: 1;
}

a { color: inherit; text-decoration: none; }

h1 { font-size: 1.6rem; font-weight: 600; margin: 0 0 4px 0; }
h2 { font-size: 1.2rem; font-weight: 600; margin: 0; }
h3 { font-size: 1rem; font-weight: 600; margin: 0; }

/* ---------- TOPBAR ---------- */

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 32px;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
}

.topbar-brand { display: flex; align-items: center; gap: 10px; }
.brand-dot {
    width: 10px; height: 10px; border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 10px 2px var(--accent-soft);
    display: inline-block;
}
.brand-name { font-weight: 700; letter-spacing: 0.5px; font-family: var(--font-mono); }
.brand-sub { color: var(--text-muted); font-size: 0.85rem; margin-left: 6px; }

.topbar-nav { display: flex; gap: 24px; }
.nav-link { color: var(--text-muted); font-weight: 500; font-size: 0.92rem; transition: color 0.15s; }
.nav-link:hover { color: var(--text); }

.topbar-user { display: flex; align-items: center; gap: 12px; }
.user-name { font-size: 0.9rem; color: var(--text-muted); }
.logout-link { font-size: 0.85rem; color: var(--red); border: 1px solid rgba(239,83,80,0.35); padding: 5px 12px; border-radius: var(--radius); }
.logout-link:hover { background: rgba(239,83,80,0.1); }

.user-badge {
    font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.5px;
    padding: 3px 10px; border-radius: 20px; font-weight: 600;
}
.user-badge.role-amministratore { background: rgba(232,163,61,0.15); color: var(--accent); }
.user-badge.role-manutentore { background: rgba(79,140,255,0.15); color: var(--blue); }

/* ---------- LAYOUT ---------- */

.page-container { max-width: 1180px; margin: 0 auto; padding: 32px 24px 64px; }

.page-header {
    display: flex; justify-content: space-between; align-items: flex-end;
    margin-bottom: 28px; gap: 16px; flex-wrap: wrap;
}
.page-subtitle { color: var(--text-muted); margin: 4px 0 0 0; font-size: 0.95rem; }

.breadcrumb {
    display: flex; gap: 8px; color: var(--text-muted); font-size: 0.85rem; margin-bottom: 16px;
}
.breadcrumb a:hover { color: var(--accent); }

/* ---------- FLASH MESSAGES ---------- */

.flash-stack { margin-bottom: 20px; display: flex; flex-direction: column; gap: 8px; }
.flash {
    padding: 12px 16px; border-radius: var(--radius); font-size: 0.9rem;
    border: 1px solid transparent;
}
.flash-success { background: rgba(45,212,191,0.1); color: var(--teal); border-color: rgba(45,212,191,0.3); }
.flash-danger { background: rgba(239,83,80,0.1); color: var(--red); border-color: rgba(239,83,80,0.3); }
.flash-warning { background: rgba(232,163,61,0.1); color: var(--accent); border-color: rgba(232,163,61,0.3); }
.flash-info { background: rgba(79,140,255,0.1); color: var(--blue); border-color: rgba(79,140,255,0.3); }

/* ---------- BUTTONS ---------- */

.btn {
    display: inline-block; padding: 10px 18px; border-radius: var(--radius);
    font-size: 0.9rem; font-weight: 600; border: 1px solid transparent;
    cursor: pointer; transition: all 0.15s; font-family: var(--font-ui);
}
.btn-primary { background: var(--accent); color: #1a1305; }
.btn-primary:hover { background: #f0b256; }
.btn-secondary { background: transparent; border-color: var(--border); color: var(--text); }
.btn-secondary:hover { border-color: var(--text-muted); }
.btn-danger { background: transparent; border-color: rgba(239,83,80,0.4); color: var(--red); }
.btn-danger:hover { background: rgba(239,83,80,0.1); }
.btn-small { padding: 6px 12px; font-size: 0.8rem; }
.btn-block { width: 100%; text-align: center; }

/* ---------- LOGIN ---------- */

.login-wrapper { display: flex; justify-content: center; align-items: center; min-height: 70vh; }
.login-card {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: 14px; padding: 40px; width: 100%; max-width: 380px;
}
.login-header { text-align: center; margin-bottom: 24px; }
.login-header h1 { font-family: var(--font-mono); margin-top: 10px; }
.login-header p { color: var(--text-muted); font-size: 0.88rem; margin-top: 4px; }

.login-form { display: flex; flex-direction: column; gap: 6px; }
.login-form label { font-size: 0.82rem; color: var(--text-muted); margin-top: 10px; }
.login-form input {
    background: var(--bg); border: 1px solid var(--border); color: var(--text);
    padding: 10px 12px; border-radius: var(--radius); font-size: 0.95rem;
}
.login-form input:focus { outline: none; border-color: var(--accent); }
.login-form button { margin-top: 20px; }

/* ---------- SSE GRID (dashboard) ---------- */

.sse-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 18px;
}
.sse-card {
    background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
    padding: 20px; transition: border-color 0.15s, transform 0.15s;
    display: flex; flex-direction: column; gap: 10px;
}
.sse-card:hover { border-color: var(--accent); transform: translateY(-2px); }

.sse-card-top { display: flex; align-items: center; gap: 8px; }
.sse-status-label { font-size: 0.75rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; }
.sse-name { margin-top: 2px; }
.sse-description { color: var(--text-muted); font-size: 0.85rem; margin: 0; flex-grow: 1; }
.sse-card-footer {
    display: flex; justify-content: space-between; font-size: 0.78rem; color: var(--text-muted);
    border-top: 1px solid var(--border); padding-top: 10px; font-family: var(--font-mono);
}

.status-dot { width: 9px; height: 9px; border-radius: 50%; display: inline-block; flex-shrink: 0; }
.status-online { background: var(--teal); box-shadow: 0 0 8px 1px rgba(45,212,191,0.5); }
.status-offline { background: var(--red); box-shadow: 0 0 8px 1px rgba(239,83,80,0.4); }

/* ---------- SENSOR GRID ---------- */

.sensor-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
}
.sensor-card {
    background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
    padding: 20px; text-align: center; transition: border-color 0.15s, transform 0.15s;
}
.sensor-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.sensor-icon { font-size: 1.6rem; margin-bottom: 8px; }
.sensor-table { color: var(--text-muted); font-size: 0.78rem; font-family: var(--font-mono); margin-top: 6px; }

/* ---------- EMPTY STATE ---------- */

.empty-state {
    background: var(--surface); border: 1px dashed var(--border); border-radius: 12px;
    padding: 48px 24px; text-align: center; color: var(--text-muted);
}
.empty-state .btn { margin-top: 12px; }

/* ---------- CHART PAGE ---------- */

.range-select { display: flex; align-items: center; gap: 8px; }
.range-select label { font-size: 0.85rem; color: var(--text-muted); }
.range-select select {
    background: var(--surface); border: 1px solid var(--border); color: var(--text);
    padding: 8px 12px; border-radius: var(--radius); font-size: 0.88rem;
}

.chart-card {
    background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
    padding: 24px; position: relative; margin-bottom: 24px;
    height: 560px; display: flex; flex-direction: column;
}
.chart-card canvas { flex-grow: 1; min-height: 0; }


.chart-status {
    position: absolute; top: 24px; left: 24px; right: 24px; text-align: center;
    color: var(--text-muted); font-size: 0.9rem; padding-top: 60px;
}
.chart-error { color: var(--red); }

.zoom-slider-wrapper { display: flex; align-items: center; gap: 14px; margin-top: 28px; }
.zoom-label { font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-muted); white-space: nowrap; }
#zoom-slider { flex-grow: 1; }

.noUi-target { background: var(--bg); border: 1px solid var(--border); box-shadow: none; }
.noUi-connect { background: var(--accent); }
.noUi-handle {
    background: var(--accent) !important; border: 2px solid var(--surface) !important;
    box-shadow: 0 0 0 1px var(--accent) !important;
    width: 16px !important; height: 16px !important; top: -5px !important;
    border-radius: 50% !important; cursor: grab;
}
.noUi-handle::before, .noUi-handle::after { display: none; }

.stats-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 16px; }
.stat-box {
    background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
    padding: 18px 20px;
}
.stat-label { display: block; font-size: 0.78rem; color: var(--text-muted); margin-bottom: 6px; }
.stat-value { font-family: var(--font-mono); font-size: 1.6rem; font-weight: 600; color: var(--accent); }
.stat-unit { font-size: 0.85rem; color: var(--text-muted); margin-left: 4px; }

/* ---------- TABLES ---------- */

.table-card {
    background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
    overflow: hidden;
}
.data-table { width: 100%; border-collapse: collapse; }
.data-table th {
    text-align: left; font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.5px;
    color: var(--text-muted); padding: 14px 20px; border-bottom: 1px solid var(--border);
}
.data-table td { padding: 14px 20px; border-bottom: 1px solid var(--border); font-size: 0.9rem; }
.data-table tr:last-child td { border-bottom: none; }
.table-subtext { color: var(--text-muted); font-size: 0.78rem; margin-top: 2px; }
.table-actions { display: flex; gap: 8px; justify-content: flex-end; }

/* ---------- FORMS ---------- */

.form-card {
    background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
    padding: 32px; max-width: 640px;
}
.stacked-form { display: flex; flex-direction: column; gap: 4px; margin-top: 20px; }
.stacked-form label { font-size: 0.82rem; color: var(--text-muted); margin-top: 14px; }
.stacked-form input, .stacked-form select {
    background: var(--bg); border: 1px solid var(--border); color: var(--text);
    padding: 10px 12px; border-radius: var(--radius); font-size: 0.95rem; margin-top: 4px;
}
.stacked-form input:focus, .stacked-form select:focus { outline: none; border-color: var(--accent); }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-row-3 { grid-template-columns: 1fr 1fr 1fr; }
.form-actions { display: flex; gap: 12px; margin-top: 28px; justify-content: flex-end; }

@media (max-width: 640px) {
    .topbar { flex-direction: column; gap: 12px; align-items: flex-start; }
    .form-row, .form-row-3 { grid-template-columns: 1fr; }
    .page-header { flex-direction: column; align-items: flex-start; }
}