:root {
    --bg-color: #0f172a;
    --card-bg: rgba(30, 41, 59, 0.7);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-color: #3b82f6;
    --accent-glow: 0 0 10px rgba(59, 130, 246, 0.5);
    --success-color: #10b981;
    --danger-color: #ef4444;
    --border-color: rgba(148, 163, 184, 0.1);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Inter', sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
}

/* Sidebar */
.sidebar {
    width: 250px;
    background: rgba(15, 23, 42, 0.9);
    border-right: 1px solid var(--border-color);
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--accent-color);
    text-shadow: var(--accent-glow);
    text-decoration: none;
}

.nav-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 1.1rem;
    transition: color 0.3s;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-links a:hover, .nav-links a.active {
    color: var(--text-primary);
    text-shadow: 0 0 5px rgba(255,255,255,0.2);
}

/* Main Content */
.main-content {
    flex: 1;
    padding: 2rem;
    overflow-y: auto;
}

header {
    margin-bottom: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

h1 {
    font-size: 2rem;
    font-weight: 600;
}

/* Cards & Glassmorphism */
.card {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    color: var(--text-secondary);
    font-weight: 500;
}

/* Buttons */
.btn {
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    border: none;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s;
    text-decoration: none;
    display: inline-block;
}

.btn-primary {
    background-color: var(--accent-color);
    color: white;
    box-shadow: var(--accent-glow);
}

.btn-primary:hover {
    background-color: #2563eb;
}

.btn-danger {
    background-color: transparent;
    border: 1px solid var(--danger-color);
    color: var(--danger-color);
}

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

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

/* Forms */
.form-group {
    margin-bottom: 1rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

input, select, textarea {
    width: 100%;
    padding: 0.75rem;
    background: rgba(15, 23, 42, 0.5);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    color: var(--text-primary);
    outline: none;
}

input:focus, select:focus, textarea:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
}

/* Status Badges */
.status {
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 500;
}

.status-connected, .status-ativo {
    background-color: rgba(16, 185, 129, 0.2);
    color: var(--success-color);
}

.status-disconnected, .status-inativo {
    background-color: rgba(239, 68, 68, 0.2);
    color: var(--danger-color);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--bg-color);
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid var(--border-color);
    width: 100%;
    max-width: 500px;
    position: relative;
}

.close-modal {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
}

#qrcode-container img {
    display: block;
    margin: 0 auto;
    max-width: 100%;
    border-radius: 0.5rem;
}