/* InvIT — Inventory System Styles */
:root {
    --bg: #0f172a;
    --bg-card: #1e293b;
    --bg-hover: #334155;
    --border: #334155;
    --text: #f1f5f9;
    --text-muted: #94a3b8;
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --green: #22c55e;
    --red: #ef4444;
    --yellow: #eab308;
    --gray: #64748b;
    --radius: 10px;
    --sidebar-w: 250px;
}

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

body {
    font-family: 'Inter', -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
}

/* ─── Layout ────────────────────────────────────────── */

.app-layout {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: var(--sidebar-w);
    background: var(--bg-card);
    border-right: 1px solid var(--border);
    padding: 0;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}

.sidebar-logo {
    padding: 20px 24px;
    font-size: 22px;
    font-weight: 800;
    color: var(--primary);
    border-bottom: 1px solid var(--border);
    letter-spacing: -0.5px;
}

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

.sidebar-nav {
    flex: 1;
    padding: 16px 0;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 24px;
    color: var(--text-muted);
    text-decoration: none;
    cursor: pointer;
    transition: all 0.15s;
    font-size: 14px;
    font-weight: 500;
    border-left: 3px solid transparent;
}

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

.nav-item.active {
    color: var(--primary);
    border-left-color: var(--primary);
    background: rgba(59, 130, 246, 0.08);
}

.nav-icon { font-size: 18px; }

.sidebar-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--border);
    font-size: 12px;
    color: var(--text-muted);
}

.main-content {
    flex: 1;
    margin-left: var(--sidebar-w);
    padding: 32px;
    max-width: 1400px;
}

/* ─── Cards ─────────────────────────────────────────── */

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 20px;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.card-title {
    font-size: 18px;
    font-weight: 700;
}

/* ─── Stats grid ────────────────────────────────────── */

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
}

.stat-label {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-value {
    font-size: 32px;
    font-weight: 800;
}

.stat-value.online { color: var(--green); }
.stat-value.offline { color: var(--red); }
.stat-value.warning { color: var(--yellow); }

/* ─── Table ──────────────────────────────────────────── */

.table-wrap {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

th {
    text-align: left;
    padding: 12px 16px;
    color: var(--text-muted);
    font-weight: 600;
    border-bottom: 1px solid var(--border);
    text-transform: uppercase;
    font-size: 12px;
    letter-spacing: 0.5px;
}

td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
}

tr:hover td {
    background: var(--bg-hover);
}

/* ─── Badges ─────────────────────────────────────────── */

.badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.badge-online { background: rgba(34, 197, 94, 0.15); color: var(--green); }
.badge-offline { background: rgba(239, 68, 68, 0.15); color: var(--red); }
.badge-warning { background: rgba(234, 179, 8, 0.15); color: var(--yellow); }
.badge-pendente { background: rgba(249, 115, 22, 0.15); color: #f97316; }
.badge-unknown { background: rgba(107, 114, 128, 0.15); color: var(--text-muted); }
.badge-unknown { background: rgba(100, 116, 139, 0.15); color: var(--gray); }

/* ─── Forms ──────────────────────────────────────────── */

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-muted);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px 14px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-size: 14px;
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
}

.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s;
    font-family: inherit;
}

.btn-primary {
    background: var(--primary);
    color: white;
}

.btn-primary:hover { background: var(--primary-hover); }

.btn-danger {
    background: var(--red);
    color: white;
}

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

.btn-sm { padding: 6px 14px; font-size: 13px; }

/* ─── Login ──────────────────────────────────────────── */

.login-wrap {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

.login-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 40px;
    width: 400px;
    max-width: 90vw;
}

.login-title {
    font-size: 28px;
    font-weight: 800;
    margin-bottom: 8px;
    color: var(--primary);
}

.login-sub {
    color: var(--text-muted);
    margin-bottom: 28px;
    font-size: 14px;
}

/* ─── Modal ──────────────────────────────────────────── */

.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
}

.modal {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 32px;
    width: 500px;
    max-width: 90vw;
    max-height: 85vh;
    overflow-y: auto;
}

.modal-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 24px;
}

/* ─── Page header ──────────────────────────────────── */

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.page-title {
    font-size: 24px;
    font-weight: 800;
}

/* ─── Alerts ─────────────────────────────────────────── */

.alert-item {
    display: flex;
    align-items: start;
    gap: 12px;
    padding: 16px;
    border-radius: 8px;
    margin-bottom: 8px;
    border-left: 3px solid;
}

.alert-critical { background: rgba(239, 68, 68, 0.08); border-color: var(--red); }
.alert-warning { background: rgba(234, 179, 8, 0.08); border-color: var(--yellow); }
.alert-info { background: rgba(59, 130, 246, 0.08); border-color: var(--primary); }

.alert-title { font-weight: 600; font-size: 14px; }
.alert-msg { font-size: 13px; color: var(--text-muted); margin-top: 4px; }
.alert-time { font-size: 12px; color: var(--text-muted); margin-left: auto; white-space: nowrap; }

/* ─── Misc ──────────────────────────────────────────── */

.search-bar {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
}

.search-bar input {
    flex: 1;
    padding: 10px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-size: 14px;
}

.empty-state {
    text-align: center;
    padding: 48px;
    color: var(--text-muted);
}

.empty-state h3 { font-size: 18px; margin-bottom: 8px; }

.spinner {
    display: inline-block;
    width: 20px; height: 20px;
    border: 2px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

.text-muted { color: var(--text-muted); }
.text-sm { font-size: 13px; }
.mt-4 { margin-top: 16px; }
.flex { display: flex; }
.gap-2 { gap: 8px; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }