/* ============================================
   style.css - Gaya global IoT Platform
   ============================================ */
* { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --bg-main: #0f172a;
    --bg-card: #1e293b;
    --bg-sidebar: #111827;
    --border: #334155;
    --accent: #38bdf8;
    --accent-2: #818cf8;
    --text-main: #e2e8f0;
    --text-muted: #94a3b8;
    --green: #4ade80;
    --red: #f87171;
    --yellow: #fbbf24;
}

body {
    font-family: 'Segoe UI', Arial, sans-serif;
    background: var(--bg-main);
    color: var(--text-main);
}

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

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

.sidebar {
    width: 230px;
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border);
    padding: 24px 16px;
    flex-shrink: 0;
}

.sidebar .brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 18px;
    color: var(--accent);
    margin-bottom: 30px;
    padding: 0 8px;
}

.sidebar nav a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 11px 12px;
    border-radius: 8px;
    color: var(--text-muted);
    font-size: 14px;
    margin-bottom: 4px;
    transition: background 0.15s, color 0.15s;
}

.sidebar nav a:hover {
    background: rgba(56, 189, 248, 0.08);
    color: var(--text-main);
}

.sidebar nav a.active {
    background: rgba(56, 189, 248, 0.15);
    color: var(--accent);
    font-weight: 600;
}

.sidebar .user-box {
    margin-top: 30px;
    padding: 14px 12px;
    border-top: 1px solid var(--border);
}

.sidebar .user-box .name {
    font-size: 14px;
    font-weight: 600;
}

.sidebar .user-box a {
    font-size: 12px;
    color: var(--red);
    display: inline-block;
    margin-top: 6px;
}

.main-content {
    flex: 1;
    padding: 28px 34px;
    max-width: 1200px;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    flex-wrap: wrap;
    gap: 10px;
}

.page-header h1 {
    font-size: 22px;
}

.page-header .subtitle {
    color: var(--text-muted);
    font-size: 13px;
    margin-top: 4px;
}

/* ---------- Cards / Grid ---------- */
.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 28px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 18px 20px;
}

.stat-card .label {
    font-size: 12px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-card .value {
    font-size: 28px;
    font-weight: 700;
    margin-top: 6px;
    color: var(--accent);
}

.device-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
    gap: 18px;
}

.card {
    background: var(--bg-card);
    border-radius: 14px;
    padding: 20px;
    border: 1px solid var(--border);
    transition: transform 0.15s, border-color 0.2s;
}

.card:hover {
    transform: translateY(-3px);
    border-color: var(--accent);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 14px;
}

.device-id { font-weight: 600; font-size: 16px; }

.badge {
    font-size: 11px;
    padding: 3px 10px;
    border-radius: 12px;
    font-weight: 600;
    text-transform: uppercase;
}

.badge.online { background: rgba(74, 222, 128, 0.15); color: var(--green); }
.badge.offline { background: rgba(248, 113, 113, 0.15); color: var(--red); }

.metrics {
    display: flex;
    justify-content: space-between;
    margin-bottom: 12px;
}

.metric { text-align: center; flex: 1; }
.metric .value { font-size: 24px; font-weight: 700; color: var(--accent); }
.metric .label { font-size: 11px; color: var(--text-muted); margin-top: 2px; }

.updated { font-size: 11px; color: #64748b; text-align: right; margin-bottom: 10px; }

.card-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

/* ---------- Buttons ---------- */
button, .btn {
    cursor: pointer;
    border: none;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 600;
    padding: 9px 14px;
    transition: opacity 0.2s, transform 0.1s;
    display: inline-block;
}

button:active, .btn:active { transform: scale(0.97); }

.btn-primary { background: var(--accent); color: #0f172a; }
.btn-secondary { background: #334155; color: var(--text-main); }
.btn-danger { background: rgba(248, 113, 113, 0.15); color: var(--red); }
.btn-success { background: rgba(74, 222, 128, 0.15); color: var(--green); }
.btn-block { width: 100%; }
button:hover, .btn:hover { opacity: 0.85; }

.relay-toggle {
    display: flex; align-items: center; gap: 8px;
    background: #0f172a; padding: 6px 10px; border-radius: 8px;
    font-size: 12px; color: var(--text-muted); flex: 1;
}

.switch {
    position: relative; width: 38px; height: 20px; flex-shrink: 0;
}
.switch input { opacity: 0; width: 0; height: 0; }
.slider {
    position: absolute; cursor: pointer; inset: 0;
    background: #475569; border-radius: 20px; transition: 0.2s;
}
.slider:before {
    content: ""; position: absolute; height: 14px; width: 14px;
    left: 3px; bottom: 3px; background: white; border-radius: 50%; transition: 0.2s;
}
input:checked + .slider { background: var(--green); }
input:checked + .slider:before { transform: translateX(18px); }

/* ---------- Forms ---------- */
.form-box {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 26px;
    max-width: 420px;
}

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

.form-group label {
    display: block;
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 6px;
}

.form-group input, .form-group select {
    width: 100%;
    padding: 11px 12px;
    background: #0f172a;
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-main);
    font-size: 14px;
    outline: none;
    transition: border-color 0.2s;
}

.form-group input:focus, .form-group select:focus {
    border-color: var(--accent);
}

/* ---------- Table ---------- */
table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-card);
    border-radius: 12px;
    overflow: hidden;
}

th, td {
    padding: 12px 16px;
    text-align: left;
    font-size: 13px;
    border-bottom: 1px solid var(--border);
}

th {
    background: #0f172a;
    color: var(--text-muted);
    text-transform: uppercase;
    font-size: 11px;
    letter-spacing: 0.5px;
}

tr:last-child td { border-bottom: none; }

/* ---------- Alerts ---------- */
.alert {
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 13px;
    margin-bottom: 16px;
}

.alert-error { background: rgba(248, 113, 113, 0.12); color: var(--red); border: 1px solid rgba(248, 113, 113, 0.3); }
.alert-success { background: rgba(74, 222, 128, 0.12); color: var(--green); border: 1px solid rgba(74, 222, 128, 0.3); }

.empty-msg {
    text-align: center;
    color: #64748b;
    padding: 40px 20px;
    grid-column: 1 / -1;
}

code {
    background: #0f172a;
    padding: 2px 6px;
    border-radius: 4px;
    color: var(--accent);
    font-size: 12px;
}

/* ---------- Login Page ---------- */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: radial-gradient(circle at top, #1e293b, #0f172a);
}

.login-box {
    background: var(--bg-card);
    padding: 36px;
    border-radius: 16px;
    border: 1px solid var(--border);
    width: 100%;
    max-width: 380px;
}

.login-box h1 {
    text-align: center;
    color: var(--accent);
    margin-bottom: 4px;
}

.login-box .subtitle {
    text-align: center;
    color: var(--text-muted);
    font-size: 13px;
    margin-bottom: 24px;
}

.login-hint {
    margin-top: 16px;
    font-size: 12px;
    color: var(--text-muted);
    text-align: center;
}

/* ---------- Responsive ---------- */
@media (max-width: 800px) {
    .app-layout { flex-direction: column; }
    .sidebar { width: 100%; padding: 14px 16px; }
    .sidebar nav { display: flex; overflow-x: auto; gap: 4px; }
    .sidebar .user-box { display: none; }
    .main-content { padding: 20px; }
}