/* Apple Design System Inspired */
:root {
    --bg-color: #f5f5f7;
    --panel-bg: rgba(255, 255, 255, 0.7);
    --panel-border: rgba(0, 0, 0, 0.05);
    --text-primary: #1d1d1f;
    --text-secondary: #86868b;
    --accent: #0071e3;
    --accent-hover: #0077ed;
    --danger: #ff3b30;
    --success: #34c759;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.04);
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #000000;
        --panel-bg: rgba(28, 28, 30, 0.75);
        --panel-border: rgba(255, 255, 255, 0.1);
        --text-primary: #f5f5f7;
        --text-secondary: #a1a1a6;
        --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
    }
}

* { margin: 0; padding: 0; box-sizing: border-box; font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, Helvetica, Arial, sans-serif; }

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    min-height: 100vh;
    font-size: 15px;
    line-height: 1.47059;
    letter-spacing: -0.022em;
    -webkit-font-smoothing: antialiased;
}

.dashboard-container { display: flex; min-height: 100vh; }

/* Sidebar */
.sidebar {
    width: 260px;
    background: var(--panel-bg);
    border-right: 1px solid var(--panel-border);
    backdrop-filter: blur(30px) saturate(180%);
    -webkit-backdrop-filter: blur(30px) saturate(180%);
    padding: 2.5rem 1.5rem;
    display: flex;
    flex-direction: column;
}

.logo h2 { font-size: 1.5rem; font-weight: 700; color: var(--text-primary); margin-bottom: 2.5rem; padding-left: 0.5rem;}
.logo span { color: var(--accent); }

.nav-links { display: flex; flex-direction: column; gap: 0.25rem; }
.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.6rem 1rem;
    border-radius: 8px;
    font-weight: 500;
    transition: all 0.2s ease;
}
.nav-links a:hover {
    background: rgba(134, 134, 139, 0.1);
}
.nav-links a.active {
    background: var(--accent);
    color: #fff;
}

/* Main Content */
.main-content {
    flex: 1;
    padding: 3rem 4rem;
    overflow-y: auto;
}

.view { display: none; animation: fadeIn 0.3s cubic-bezier(0.25, 0.1, 0.25, 1); }
.view.active { display: block; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(5px); } to { opacity: 1; transform: translateY(0); } }

.header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 3rem; }
.header h1 { font-size: 2.5rem; font-weight: 700; letter-spacing: -0.003em; }

/* Components */
.glass-panel {
    background: var(--panel-bg);
    border: 1px solid var(--panel-border);
    border-radius: 18px;
    padding: 2.5rem;
    backdrop-filter: blur(20px) saturate(150%);
    -webkit-backdrop-filter: blur(20px) saturate(150%);
    box-shadow: var(--shadow);
}

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 1.5rem; }

.card { transition: transform 0.2s; }
.card:hover { transform: scale(1.01); }
.card h3 { margin-bottom: 0.75rem; font-weight: 600; font-size: 1.25rem; }
.card p { color: var(--text-secondary); margin-bottom: 1rem; }

.status-badge {
    display: inline-block; padding: 0.3rem 0.8rem; border-radius: 12px; font-size: 0.75rem; font-weight: 600; letter-spacing: 0.02em; text-transform: uppercase;
}
.status-connected { background: rgba(52, 199, 89, 0.15); color: var(--success); }
.status-disconnected { background: rgba(255, 59, 48, 0.15); color: var(--danger); }

.btn-primary {
    background: var(--accent); color: white; border: none; padding: 0.6rem 1.2rem;
    border-radius: 20px; font-weight: 600; cursor: pointer; transition: 0.2s; font-size: 0.9rem;
}
.btn-primary:hover { background: var(--accent-hover); transform: scale(1.02); }
.btn-danger {
    background: var(--danger); color: white; border: none; padding: 0.6rem 1.2rem;
    border-radius: 20px; cursor: pointer; transition: 0.2s; font-weight: 600; font-size: 0.9rem;
}

.form-group { margin-bottom: 1.5rem; }
.form-group label { display: block; margin-bottom: 0.5rem; color: var(--text-primary); font-size: 0.9rem; font-weight: 500; }
.form-group input, .form-group textarea, .form-group select {
    width: 100%; padding: 0.8rem 1rem; border-radius: 12px;
    background: var(--bg-color); border: 1px solid var(--panel-border);
    color: var(--text-primary); font-size: 1rem; transition: border-color 0.2s, box-shadow 0.2s;
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus { 
    outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(0, 113, 227, 0.2); 
}

/* Modal */
.modal {
    display: none; position: fixed; z-index: 100; left: 0; top: 0; width: 100%; height: 100%;
    background-color: rgba(0, 0, 0, 0.4); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
    justify-content: center; align-items: center;
}
.modal.active { display: flex; animation: fadeIn 0.3s; }
.modal-content { max-width: 400px; width: 100%; text-align: center; position: relative; padding: 3rem 2rem; border-radius: 24px;}
.close { position: absolute; right: 1.5rem; top: 1.5rem; font-size: 1.5rem; cursor: pointer; color: var(--text-secondary); width: 30px; height: 30px; display:flex; justify-content:center; align-items:center; border-radius:50%; background: var(--bg-color);}
.qr-box { margin: 2rem auto; width: 220px; height: 220px; background: white; border-radius: 16px; padding: 15px; display: flex; justify-content: center; align-items: center; box-shadow: 0 10px 30px rgba(0,0,0,0.1);}
.qr-box img { width: 100%; height: 100%; }

.loader {
    border: 3px solid rgba(0, 113, 227, 0.2); border-left-color: var(--accent);
    border-radius: 50%; width: 32px; height: 32px; animation: spin 1s linear infinite;
}
@keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }